CN107982828B - Foam mixing device of foam liquid supply vehicle and control method thereof - Google Patents
Foam mixing device of foam liquid supply vehicle and control method thereof Download PDFInfo
- Publication number
- CN107982828B CN107982828B CN201810013811.3A CN201810013811A CN107982828B CN 107982828 B CN107982828 B CN 107982828B CN 201810013811 A CN201810013811 A CN 201810013811A CN 107982828 B CN107982828 B CN 107982828B
- Authority
- CN
- China
- Prior art keywords
- foam
- control valve
- proportional control
- electric proportional
- liquid supply
- Prior art date
- 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.)
- Active
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C5/00—Making of fire-extinguishing materials immediately before use
- A62C5/02—Making of fire-extinguishing materials immediately before use of foam
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C27/00—Fire-fighting land vehicles
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C5/00—Making of fire-extinguishing materials immediately before use
- A62C5/002—Apparatus for mixing extinguishants with water
Abstract
The invention provides a foam mixing device of a foam liquid supply vehicle and a control method thereof. The foam mixing device comprises a foam pump, a straight-section water pipeline, a foam flowmeter, a first electric proportional control valve and a second electric proportional control valve, wherein an outlet of the foam pump sequentially passes through the foam flowmeter and the first electric proportional control valve and is connected with a joint on the side wall of the straight-section water pipeline, and one end of the foam flowmeter, which is connected with an outlet of the foam pump, is connected with an inlet of the foam pump through the second electric proportional control valve. The invention can directly inject the foam stock solution into the foam liquid supply vehicle according to the preset foam proportion after the conveying water belt of the water supply fire fighting vehicle passes through the pipeline connected with the foam liquid supply vehicle, the mixed liquid is conveyed to the water pump inlet of the front main fighting fire fighting vehicle, and the main fighting fire fighting vehicle directly carries out the coupling foam injection operation for fire extinguishing.
Description
Technical Field
The invention relates to the technical field of fire fighting, in particular to a foam mixing device of a foam liquid supply vehicle and a control method thereof.
Background
In numerous conflagrations, conflagrations such as petrochemical industry class quantity constantly increases, present fire brigade adopts city owner to fight foam fire engine to put out a fire mostly, but this car is used for the city mostly, and the volume of water pitcher and foam jar is less, so need the supply of large-tonnage water supply vehicle and foam confession liquid car, and traditional solution is during the water pitcher of giving main war fire engine with the water supply of large-tonnage water supply vehicle, and the foam confession liquid car gives main war fire engine's foam jar with foam stoste in with the foam, thereby main war fire engine self carries out the foam again and mixes the injection foam and put out a fire.
At present, liquid supply fire trucks of all domestic manufacturers do not have automatic foam proportion mixing devices, the simple foam supply form is adopted, fire extinguishing needs to be carried out for a long time in a complex fire situation, and the phenomenon that foam liquid of a conventional foam truck equipped by a fire brigade is insufficient needs to be supplied by the foam liquid supply truck. The following disadvantages are present in relation to the present invention:
(1) The foam liquid supply vehicle needs to go deep into the first line of a fire scene to supply foam liquid;
(2) Because the foam stock solution is firstly injected into the foam tank of the main fighting fire truck, and then the foam fire extinguishing can be carried out after the water tank is supplied by the water supply truck, the expansion operation time is long, and the valuable fire extinguishing time can be delayed for the fire extinguishing operation;
(3) If the front first-line fire truck is a non-foam fire truck and is a common water tank truck, foam jet fire extinguishing cannot be carried out.
Disclosure of Invention
The invention aims to provide a foam mixing device of a foam liquid supply vehicle and a control method thereof, and aims to solve the problems that foam stock solution needs to be firstly injected into a foam tank of a main fighting fire truck, and then foam fire extinguishing can be carried out after a water tank is supplied by a water supply vehicle, the expansion operation time is long, and the valuable fire extinguishing time is delayed for fire extinguishing operation in the prior art.
In order to solve the technical problem, the invention provides a foam mixing device of a foam liquid supply vehicle, which comprises a foam pump, a straight-section water pipeline, a foam flowmeter, a first electric proportional control valve and a second electric proportional control valve, wherein an outlet of the foam pump is connected with a connector on the side wall of the straight-section water pipeline sequentially through the foam flowmeter and the first electric proportional control valve, and one end of the foam flowmeter, which is connected with the outlet of the foam pump, is connected with an inlet of the foam pump through the second electric proportional control valve.
Preferably, a water flow meter and a pressure sensor are arranged on the straight-section water pipeline.
Preferably, the first electric proportional control valve and the second electric proportional control valve are proportional valves.
The invention also provides a control method of the foam mixing device of the foam liquid supply vehicle, wherein the control method comprises a first mode for controlling the opening degree of the first electric proportional control valve to adjust the foam injection proportion and a second mode for controlling the opening degree of the second electric proportional control valve to perform pressure relief operation, and the control method is characterized by comprising the following steps of:
step 1, opening degrees of a first electric proportional control valve and a second electric proportional control valve in an initial state are 50%;
step 2, under the condition of keeping the opening of the second electric proportional control valve unchanged, adjusting the opening of the first electric proportional control valve to enter a first mode;
and step 3, switching between the first mode and the second mode according to the following conditions:
step 31, activating the first mode when one of the following conditions is met: the opening degree of the second electric proportional control valve is more than 95%, or the opening degree of the second electric proportional control valve is less than 3%, or the outlet pressure of the foam pump is more than 600KPA and the actual foam flow is less than the set flow;
step 32, activating the second mode when one of the following conditions is met: the opening degree of the first electric proportional control valve is larger than 95%, or the opening degree of the first electric proportional control valve is smaller than 18%, or the outlet pressure of the foam pump is larger than 600KPA and the actual flow is larger than the set flow, or the set flow is smaller than 3L/s, the foam proportion is smaller than 5%, the opening degree of the pressure release valve is smaller than 10%, and the actual flow is larger than the set flow.
The invention can directly inject the foam stock solution into the foam liquid supply vehicle according to the preset foam proportion after the conveying water belt of the water supply fire fighting vehicle passes through the pipeline connected with the foam liquid supply vehicle, the mixed liquid is conveyed to the water pump inlet of the front main fighting fire fighting vehicle, and the main fighting fire fighting vehicle directly carries out the coupling foam injection operation for fire extinguishing. Therefore, the foam liquid supply vehicle does not need to supply foam stock solution at the forefront end of a fire scene, can directly inject foam at the periphery of the fire scene, and removes the limitation of narrow terrains; the operation steps are simplified, and the foam fire extinguishing speed for the front main fighting fire truck can be greatly improved; the mixed liquid is directly injected into a water pump of the main fighting fire truck to be pumped into a water gap for coupling operation, so that the fire extinguishing performance is improved; even if the foam fire truck in the front non-main fighting is a common water tank fire truck, the foam can be directly sprayed to extinguish fire.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of the present invention.
Reference numbers in the figures: 1. a foam pump; 2. a straight section water pipeline; 3. a foam flow meter; 4. a first electric proportional control valve; 5. a second electric proportional control valve; 6. a water flow meter; 7. a pressure sensor.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
The invention provides a foam mixing device of a foam liquid supply vehicle, which comprises a foam pump 1, a straight-section water pipeline 2, a foam flow meter 3, a first electric proportional regulating valve 4 and a second electric proportional regulating valve 5, wherein an outlet of the foam pump 1 is connected with a connector on the side wall of the straight-section water pipeline 2 sequentially through the foam flow meter 3 and the first electric proportional regulating valve 4, and one end of the foam flow meter 3, which is connected with the outlet of the foam pump 1, is connected with an inlet of the foam pump 1 through the second electric proportional regulating valve 5. Preferably, the straight water pipeline 2 is provided with a water flow meter 6 and a pressure sensor 7. Preferably, the first electric proportional control valve 4 and the second electric proportional control valve 5 are both proportional valves.
Referring to fig. 1, when in use, positive pressure water enters the straight water pipe 2 from the direction of arrow D, and simultaneously positive pressure foam enters the inlet of the foam pump 1 from the direction of arrow a and then flows out from the outlet of the foam pump 1, wherein a part of the positive pressure foam flows out from the direction of arrow B, and the other part of the positive pressure foam flows into the straight water pipe 2 after flowing through the foam flow meter 3 and the first electric proportional control valve 4 along the direction of arrow C, and then is mixed with water in the straight water pipe 2 and flows out from the straight water pipe in the direction of arrow E for fire fighting. In addition, the outlet of the foam pump 1 is connected with the inlet thereof through the second electric proportional control valve 5, so that the pressure relief can be adjusted through adjusting the second electric proportional control valve 5, thereby further achieving the adjustment of the foam pressure in the injected water.
During the use, the hosepipe with the water supply vehicle is connected and is supplied the straight section water pipeline 2 of liquid vehicle, and the pipeline other end passes through the hosepipe and connects on main chariot, namely passes through the liquid vehicle pipeline with former water supply hosepipe, carries out the foam and pours into.
According to the invention, after a water conveying belt of the water supply fire truck passes through a pipeline connected with the foam liquid supply truck, the foam liquid supply truck directly injects foam stock solution according to a preset foam proportion, the mixed solution is conveyed to a water pump inlet of a front main fighting fire truck, and the main fighting fire truck directly carries out coupling injection foam operation for fire extinguishing. Therefore, the foam liquid supply vehicle does not need to supply foam stock solution at the forefront end of a fire scene, can directly inject foam at the periphery of the fire scene, and removes the limitation of narrow terrains; the operation steps are simplified, and the foam fire extinguishing speed for the front main fighting fire truck can be greatly improved; the mixed liquid is directly injected into a water pump of the main fighting fire truck to be pumped into a water gap for coupling operation, so that the fire extinguishing performance is improved; even if the foam fire truck in the front non-main fighting is a common water tank fire truck, the foam can be directly sprayed to extinguish fire.
The invention also provides a control method of the foam mixing device of the foam liquid supply vehicle, wherein the double closed-loop PID control adjusts two electric proportional control valves, namely a first mode and a second mode, the foam mixing device of the foam liquid supply vehicle comprises a first mode for controlling the opening degree of a first electric proportional control valve 4 to adjust the foam injection proportion and a second mode for controlling the opening degree of a second electric proportional control valve 5 to perform pressure relief operation, and the control method is characterized by comprising the following steps:
step 1, the opening degree of the first electric proportional control valve 4 and the second electric proportional control valve 5 in the initial state is 50%; the opening degree control of the first electric proportional control valve 4 and the second electric proportional control valve 5 can be realized by using a conventional PID algorithm in the prior art.
Step 2, under the condition that the opening degree of the second electric proportional control valve 5 is kept unchanged, the opening degree of the first electric proportional control valve 4 is adjusted to enter a first mode;
and step 3, switching between the first mode and the second mode according to the following conditions:
step 31, activating the first mode when one of the following conditions is met: the opening degree of the second electric proportional control valve 5 is more than 95%, or the opening degree of the second electric proportional control valve 5 is less than 3%, or the outlet pressure of the foam pump 1 is more than 600KPA and the actual foam flow is less than the set flow;
step 32, activating the second mode when one of the following conditions is met: the opening degree of the first electric proportional control valve 4 is larger than 95%, or the opening degree of the first electric proportional control valve 4 is smaller than 18%, or the outlet pressure of the foam pump 1 is larger than 600KPA and the actual flow is larger than the set flow, or the set flow is smaller than 3L/s, the foam proportion is smaller than 5%, the opening degree of the pressure release valve is smaller than 10%, and the actual flow is larger than the set flow.
This equipment has been solved the foam and has been supplied the liquid car and can directly pour into the foam stoste into the large-tonnage water supply fire engine water outlet hose according to predetermined foam proportion, but form the foam mixed liquid that the direct injection was put out a fire, supplies the place ahead fire engine direct injection foam to put out a fire.
The key points and the protection points of the invention are as follows
A: the idea is innovative: the direct foam stock solution is directly injected into a water supply hose according to a preset proportion, and the foam stock solution is not injected into a foam tank of a fire engine, so that the two concepts are completely different.
B: the automation degree is high: the PLC controls the double-proportion regulating valve to respectively control the foam injection amount and pressure protection.
C: the reliability is high, and the maintenance cost is low: the device can be seen to be composed of mechanical structural parts and controlled by a PLC program, the probability of failure is low, and later maintenance is convenient.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The using method of the foam mixing device of the foam liquid supply vehicle is characterized in that the foam mixing device of the foam liquid supply vehicle comprises a foam pump (1), a straight-section water pipeline (2), a foam flow meter (3), a first electric proportional control valve (4) and a second electric proportional control valve (5), an outlet of the foam pump (1) is connected with a connector on the side wall of the straight-section water pipeline (2) sequentially through the foam flow meter (3) and the first electric proportional control valve (4), and one end of the foam flow meter (3), which is connected with the outlet of the foam pump (1), is connected with an inlet of the foam pump (1) through the second electric proportional control valve (5);
the use method of the foam mixing device of the foam liquid supply vehicle comprises the following steps:
when the water supply fire fighting truck is used, the water of the water supply fire fighting truck is connected to the straight section water pipeline (2) of the liquid supply truck, and the other end of the straight section water pipeline (2) is connected to a main fighting truck through the water;
after a water conveying belt of the water supply fire truck passes through the straight section water pipeline (2) connected with the foam liquid supply truck, foam stock solution is directly injected into the foam liquid supply truck according to a preset foam proportion, mixed liquid is conveyed to a water pump of a front main fighting fire truck to be pumped into a water gap, and the main fighting fire truck directly carries out coupling injection foam operation to extinguish fire.
2. The use method of the foam mixing device of the foam liquid supply vehicle according to claim 1, wherein a water flow meter (6) and a pressure sensor (7) are arranged on the straight-section water pipeline (2).
3. The use method of the foam mixing device of the foam liquid supply vehicle according to claim 1, wherein the first electric proportional control valve (4) and the second electric proportional control valve (5) are proportional valves.
4. The method for using the foam mixing device of the foam liquid supply vehicle according to claim 3, wherein the foam mixing device adopts a double closed loop PID control to regulate two electric proportional control valves, which is a first mode for controlling the opening degree of a first electric proportional control valve (4) to regulate the foam injection proportion and a second mode for controlling the opening degree of a second electric proportional control valve (5) to perform a pressure relief operation, and specifically comprises the following steps:
step 1, opening degrees of a first electric proportional control valve (4) and a second electric proportional control valve (5) in an initial state are 50%;
step 2, under the condition that the opening degree of a second electric proportional control valve (5) is kept unchanged, the opening degree of a first electric proportional control valve (4) is adjusted to enter a first mode;
and step 3, switching between the first mode and the second mode according to the following conditions:
step 31, activating the first mode when one of the following conditions is met: the opening degree of the second electric proportional control valve (5) is more than 95%, or the opening degree of the second electric proportional control valve (5) is less than 3%, or the outlet pressure of the foam pump (1) is more than 600KPA and the actual foam flow is less than the set flow;
step 32, activating the second mode when one of the following conditions is met: the opening degree of the first electric proportional control valve (4) is larger than 95%, or the opening degree of the first electric proportional control valve (4) is smaller than 18%, or the outlet pressure of the foam pump (1) is larger than 600KPA, the actual flow is larger than the set flow, or the set flow is smaller than 3L/s, the foam proportion is smaller than 5%, the opening degree of the pressure release valve is smaller than 10%, and the actual flow is larger than the set flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810013811.3A CN107982828B (en) | 2018-01-08 | 2018-01-08 | Foam mixing device of foam liquid supply vehicle and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810013811.3A CN107982828B (en) | 2018-01-08 | 2018-01-08 | Foam mixing device of foam liquid supply vehicle and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107982828A CN107982828A (en) | 2018-05-04 |
| CN107982828B true CN107982828B (en) | 2022-12-09 |
Family
ID=62039691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810013811.3A Active CN107982828B (en) | 2018-01-08 | 2018-01-08 | Foam mixing device of foam liquid supply vehicle and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107982828B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111265806A (en) * | 2020-03-01 | 2020-06-12 | 北京中卓时代消防装备科技有限公司 | Positive pressure B-type foam liquid supply system and method for fire fighting truck |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6991041B2 (en) * | 2003-02-28 | 2006-01-31 | Hale Products, Inc. | Compressed air foam pumping system |
| CN102049115B (en) * | 2009-11-03 | 2013-01-09 | 徐州重型机械有限公司 | Fire truck and fire protection foam system thereof |
| CN202822547U (en) * | 2012-07-30 | 2013-03-27 | 吴尚桦 | Foam type fire extinguishing device |
| CN203154668U (en) * | 2013-03-29 | 2013-08-28 | 西华大学 | Compressed gas foam proportioning device |
| CN104492008B (en) * | 2015-01-05 | 2016-04-13 | 北京中卓时代消防装备科技有限公司 | The pouring-in positive/negative-pressure foam proportioning system of a kind of foam truck |
| CN105056434A (en) * | 2015-07-09 | 2015-11-18 | 福建新偌环境科技有限公司 | Trailer fire extinguishing device with foam carrying pressure and expanding actively |
| CN206483032U (en) * | 2017-02-09 | 2017-09-12 | 北京中卓时代消防装备科技有限公司 | A kind of integrated control froth fire extinguishing system |
| CN107007958B (en) * | 2017-06-06 | 2022-08-30 | 明光浩淼安防科技股份公司 | Novel foam fire engine and foam supply and conveying device |
| CN107213564A (en) * | 2017-07-05 | 2017-09-29 | 九江中船消防设备有限公司 | A kind of froth fire extinguishing system measures self-balancing type hybrid technology |
| CN207871317U (en) * | 2018-01-08 | 2018-09-18 | 北京中卓时代消防装备科技有限公司 | The foams mix device of foam liquid supply vehicle |
-
2018
- 2018-01-08 CN CN201810013811.3A patent/CN107982828B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107982828A (en) | 2018-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11135461B2 (en) | Fire suppression system component integration | |
| CN104958847B (en) | Compressed air foam fire-extinguishing apparatus for large-scale floating roof tank | |
| CN206700539U (en) | A kind of fixed CAFS | |
| US5996700A (en) | Foam proportioner system | |
| CN201529337U (en) | Fire-fighting foam mixing ratio control system and fire engine with same | |
| CN104971454B (en) | The special compressed-air foam automatic fire extinguishing system in tunnel | |
| WO2021120532A1 (en) | Foam uniform-mixing pipe, mixed foam fire extinguishing system, control method therefor, and fire fighting truck | |
| CN203154668U (en) | Compressed gas foam proportioning device | |
| WO2018231096A1 (en) | Mobile fire extinguishing apparatus with pressurized foam generation | |
| CN107982828B (en) | Foam mixing device of foam liquid supply vehicle and control method thereof | |
| CN115350427B (en) | Fire fighting foam foamer, system and foaming method | |
| CN103055455B (en) | Multifunctional compressed air foam fire extinguishing device | |
| CN107823821B (en) | Water mist fire extinguishing system capable of accurately mixing fire extinguishing liquid in real time and application method thereof | |
| CN104922830A (en) | High-flow negative pressure type foam generator | |
| CN102784449B (en) | Remote automatic water supply system | |
| CN209005106U (en) | Fire fighting truck pipe defroster and fire fighting truck | |
| CN115350426B (en) | Fire-fighting foam foaming device, fire-fighting foam foaming system and foaming method | |
| CN207871317U (en) | The foams mix device of foam liquid supply vehicle | |
| CN205460597U (en) | Fire engine is with flowing buret way | |
| CN210170719U (en) | Fire control foam liquid long-range recovery unit and system thereof | |
| CN209576351U (en) | Hybrid system before denitration pumps | |
| CN209262685U (en) | A kind of intelligence defoaming device | |
| CN208465030U (en) | A kind of big flow water-foam solution mixing arrangement | |
| CN208641606U (en) | A kind of uninterrupted foam liquid supply vehicle for inhaling feed flow | |
| CN203577194U (en) | Foam proportionally-mixing unit of airport fire fighting truck |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |