CN108671448A - It is a kind of to gather liquid-supplying system and operating method for fire fighting truck - Google Patents
It is a kind of to gather liquid-supplying system and operating method for fire fighting truck Download PDFInfo
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- CN108671448A CN108671448A CN201810479091.XA CN201810479091A CN108671448A CN 108671448 A CN108671448 A CN 108671448A CN 201810479091 A CN201810479091 A CN 201810479091A CN 108671448 A CN108671448 A CN 108671448A
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- branch
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Classifications
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- 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
- A62C31/00—Delivery of fire-extinguishing material
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
Gathering liquid-supplying system for fire fighting truck the invention discloses a kind of, including water tender, branch, gathers pipeline, controller and main line；Water tender have it is multiple, water tender corresponding branch using by way of in parallel with gather piping connection；Branch road is equipped with electric control valve, pressure transmitter and non-return valve；Gather pipeline to connect with main line, is equipped with decompression venting valve, the 5th pressure transmitter, electromagnetic flowmeter, vehicle-mounted centrifugal pump and fire monitor on main line successively；Controller is connect with electric control valve, pressure transmitter, decompression venting valve, the 5th pressure transmitter and electromagnetic flowmeter respectively.Present invention can ensure that fire fighting truck Vehicle loaded pump water is lasting, stable, various water demands can be met according to scene of a fire size, especially suitable for big flow needed for large-sized fire, high pressure occasion.The present invention takes full advantage of the pressure of water tender offer, and a part of power of offset fire fighting truck Vehicle loaded pump is energy saving.
Description
Technical field
Gather liquid-supplying system and behaviour the present invention relates to waterworks for firefighting field more particularly to a kind of fire fighting truck Vehicle loaded pump
Make method.
Background technology
With the fast development of China's city sizeization, population agglomeration, residence district is increasing with high-rise building, and city disappears
It is anti-to have welcome new challenge.The problems such as urban fire control vehicle is faced at present, and floor is excessively high, road is narrow, vehicle-mounted fire-fighting system supply
Water is in the form of a single, and water supply capacity is poor, cannot be satisfied the duration for the water supply that space has under extreme position；Also it cannot be satisfied the large-scale scene of a fire
The requirement of duration and stability to high pressure, big flow feed flow.
In existing hydrotechny, method that more water tenders supply water to a fire fighting truck be by simple tank,
I.e. water tender supplies water to simple tank, and fire fighting truck Vehicle loaded pump draws the water in simple tank and is used for putting out a fire.But existing skill
Art is inconvenient for operation, and simple water storage tankage is limited, needs the regular hour to pour water to tank, when wasting valuable rescue
Between, and have no idea, using the hydraulic pressure of water tender, certain pressure to be caused to waste.
Invention content
Based on background technology there are the problem of, what the present invention proposed a kind of fire fighting truck Vehicle loaded pump gathers liquid-supplying system, is used for
More water tenders ensure the stabilization of the pressure to supply water and flow, continue to the operating mode of a vehicle-mounted water supplying pump of fire fighting truck.
It is proposed by the present invention it is a kind of gathering liquid-supplying system for fire fighting truck, including water tender, branch, gather pipeline, control
Device and main line processed；Water tender have it is multiple, water tender corresponding branch using by way of in parallel with gather piping connection；Branch
Road is equipped with electric control valve, pressure transmitter and non-return valve；It is to summarize multichannel water for water all the way to gather pipeline, and structure is more
Kind is various, according to multiple ontology process medium fluid Impact Law, selects simple Demountable modular structure, while converging pipeline
Diameter is much larger than the diameter of branch；Gather pipeline to connect with main line, is equipped with decompression venting valve, the 5th pressure on main line successively
Transmitter, electromagnetic flowmeter, vehicle-mounted centrifugal pump and fire monitor；Controller is steady with electric control valve, pressure transmitter, decompression respectively
Pressure valve, the 5th pressure transmitter and electromagnetic flowmeter connection；
Electric control valve can carry out the adjusting of valve opening according to input signal；Electromagnetic flowmeter and the exportable pressure of pressure transmitter
Power and flow signal；The pressure of pressure-reduced and-regulated valve outlet is constant, will not change because of the variation of inlet pressure and flow, go out
Mouth pressure can be adjusted in a certain range；
The major function of controller is to be compared bypass flow and pressure with main line flow and pressure value, and according to comparing
Output control motorized adjustment valve regulation aperture；It is equipped with the control device of decompression venting valve in controller, can be inputted out on panel
Mouth pressure value, decompression venting valve automatic adjustment.
As an improvement, controller uses PID controller.
As an improvement, decompression venting valve is equipped with pilot valve, controller is connect by electromagnetic control apparatus with pilot valve.
The present invention also provides a kind of operating methods for gathering liquid-supplying system, include the following steps：
A. it keeps the aperture of electric control valve minimum, opens the fire pump of water tender successively;
B. controller carries out aperture regulation according to branch pressure transmitter value to electric control valve, under the premise of ensureing flow,
Keep the differing pressure in branch smaller;
C. controller is adjusted automatically according to the numerical value of the 5th pressure transmitter on the pressure transmitter and main line of branch road simultaneously
Whole setup pressure value, the front and back pressure difference for making decompression venting valve in a certain range, will not lead to larger flow loss；
D. when main line underfed, controller reduces the pressure difference of decompression venting valve by the aperture of increase electric control valve,
For increasing the flow of main line, when main line flow is excessive, reverse operating electric control valve and decompression venting valve；
E. when water tender water-holding quantity will exhaust, the pressure reduction in branch, the electric control valve on controller controlling brancher is opened
Until closing, the motorized adjustment valve opening controlled on remaining bypass line increases for degree reduction, and synchronous unlatching water tender, makes water supply
Vehicle and water tender can realize synchronism switching；
F. the step of controller progress b, c and d is carried out.
In the present invention, the electric control valve of each branch is opened first minimum aperture；Then according on convergence main road
Pressure and flow control the aperture of electric control valve by controller, and then adjust pressure and flow on convergence main road；When certain
When the water of one water tender is close to the lowest limit, this branch road flow and pressure can continuously decrease, to ensure on convergence main line
Flow, needs to increase new water tender at this time and replaces, to ensure the continual and steady of main line pressure and flow；It is supplying water
It, can be synchronous to open by further opening the aperture of electric control valve to ensure the stability of flow of main line in vehicle handoff procedure
The valve of the water tender branch newly increased, the water that the water tender that filling up will exhaust is provided；
Advantageous effect：It is provided by the invention a kind of to gather liquid-supplying system for fire fighting truck, it is ensured that fire fighting truck Vehicle loaded pump is used
Lasting, the stabilization of water, can meet various water demands, especially suitable for being flowed greatly needed for large-sized fire according to scene of a fire size
Amount, high pressure occasion.Scheme compared with prior art, floor space is small, does not need time, can come into operation in real time, extends
Rescue time；The pressure of water tender offer is taken full advantage of simultaneously, and a part of power of offset fire fighting truck Vehicle loaded pump is energy saving.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
In figure：A1, the first water tender, A2, the second water tender, A3, third water tender, A4, the 4th water tender, B1, the first branch,
B2, the second branch, B3, third branch, B4, the 4th branch, C1, the first electric control valve, C2, the second electric control valve, C3,
Three electric control valves, C4, the 4th electric control valve, D1, first pressure transmitter, D2, second pressure transmitter, D3, third pressure
Power transmitter, D4, the 4th pressure transmitter, E1, the first non-return valve, E2, the second non-return valve, E3, third non-return valve, E4, the 4th
Non-return valve, 4, gather pipeline, 5, decompression venting valve, the 6, the 5th pressure transmitter, 7, electromagnetic flowmeter, 8, vehicle-mounted centrifugal pump, 9,
Fire monitor, 10, controller, 11, main line.
Specific implementation mode
Now by taking the water tender A of the same model of same type as an example, the performance of every water tender A is metered flow 15L/s, volume
The metered flow of constant-pressure 1MPa, the vehicle-mounted centrifugal pump 8 of fire fighting truck are 40L/s, rated pressure 2.5MPa.
As shown in Figure 1, the system proposed by the present invention for gathering feed flow for fire fighting truck, including four water tenders（A1、A2、
A3、A4）, four branches（B1、B2、B3、B4）, gather pipeline 4, controller 10 and main line 11；Four water tenders（A1、A2、
A3、A4）Pass through corresponding branch（B1、B2、B3、B4）It is connect with aggregation pipeline 4 by the way of in parallel；Four branches（B1、
B2、B3、B4）On set altogether there are four electric control valve（C1、C2、C3、C4）, four pressure transmitters（D1、D2、D3、D4）And four
A non-return valve（E1、E2、E3、E4）；The pipeline 4 that gathers is connect with main line 11, is equipped with pressure-reduced and-regulated on main line 11 successively
Valve 5, the 5th pressure transmitter 6, electromagnetic flowmeter 7, vehicle-mounted centrifugal pump 8 and fire monitor 9；Controller 10 uses PID controller, control
Device 10 processed respectively with electric control valve（C 1、C2、C3、C4）, pressure transmitter（D1、D2、D3、D4）, the 5th pressure transmitter 6
And electromagnetic flowmeter 7 connects；Decompression venting valve 5 is equipped with pilot valve, and controller 10 is connect by electromagnetic control apparatus with pilot valve.
Water tender in the present embodiment（A1、A2、A3）Normal boot-strap supplies water, the vehicle-mounted centrifugal pump 8 for meeting fire fighting truck
Water consumption；Water tender A4 is spare, when first three water tender（A1、A2、A3）In a certain water when exhausting, water tender A4 is used for generation
For water supply, ensure the water consumption of fire fighting truck Vehicle loaded pump 8.
Detailed process is as follows：It keeps the aperture of electric control valve C minimum, opens the fire pump of water tender, non-return valve E successively
For preventing aqueous reflux to the branch B for the water tender fire pump subsequently opened；Pressure water is delivered to collection through different length branch B
Poly- pipeline 4, different branch B waters reach the entrance of decompression venting valve 5 after convergence in gathering pipeline 4；Pass through pressure-reduced and-regulated
The outlet of valve 5 measures the pressure of water using the 5th pressure transmitter 6 and electromagnetic flowmeter 7 and flow is used to feed back to controller
10；Then the entrance for reaching fire fighting truck Vehicle loaded pump 8 is pumped into fire monitor 9 by vehicle-mounted centrifugal pump 8 and sprays fire extinguishing.
Because the water strip length in branch B is different in the present embodiment, pipeline is different in water tender A, causes liquid resistance different, needs root
The pressure measured according to branch pressure transmitter D carries out aperture regulation by controller 10 to electric control valve C, is ensureing flow
Under the premise of, it keeps the differing pressure in branch B smaller, adverse current will not be caused.
The outlet pressure of decompression venting valve 5 will not change because of the variation of inlet pressure in the present embodiment, be depressurized when adjusting
After the pilot valve of pressure maintaining valve 5 sets certain pressure value, pressure that outlet pressure will be kept constant.Reduction is brought because of voltage stabilizing
Changes in flow rate needs controller 10 according to the 5th pressure transmitter 6 on the pressure transmitter D and main line 11 on branch B
Numerical value, adjusts setup pressure value, and the front and back pressure difference for making decompression venting valve 5 in a certain range, will not lead to larger stream
Amount loss.Electromagnetic flowmeter 7 is used for measuring the flow of main line 11, and when 11 underfed of main line, controller 10 passes through increasing
The aperture of big electric control valve C, reduces the pressure difference of decompression venting valve 5, for increasing the flow of main line 11, when main line 11 flows
When measuring excessive, reverse operating electric control valve C and decompression venting valve 5.
When water tender A3 water-holding quantities will exhaust in the present embodiment, the pressure reduction in branch B3, controller 10 controls B3
The electric control valve C3 apertures of branch road reduce until closing, controls electric control valve C1, C2 on remaining branch B1, B2 pipeline
Aperture increases, and synchronous unlatching water tender A4, and water tender A3 and water tender A4 is enable to realize synchronism switching.Switched at this
Cheng Zhong, controller 10 are set according to the numerical value of the 5th pressure transmitter 6 of pressure transmitter D and main line 11 on each branch B, adjustment
Level pressure force value, the front and back pressure difference for making decompression venting valve 5 in a certain range, will not lead to larger flow loss.According to
The measured value of electromagnetic flowmeter 7, when main line flow is excessive, controller 10 controls the electric control valve C apertures of each branch road
Reduce, the flow of main line 11 is made to reduce to the requirements of vehicle-mounted centrifugal pump 8.
The operating method provided by the invention for gathering liquid-supplying system, includes the following steps：
A. electric control valve is kept（C1、C2、C3）Aperture it is minimum, open water tender successively（A1、A2、A3）Fire pump;
B. controller 10 is according to branch pressure transmitter（D1、D2、D3）Value is to electric control valve（C1、C2、C3）Carry out aperture tune
Section keeps the differing pressure in branch smaller under the premise of ensureing flow;
C. simultaneously controller 10 according to the pressure transmitter of branch road（D1、D2、D3）With the 5th pressure inverting on main line 11
The numerical value of device 6, adjust automatically setup pressure value, the front and back pressure difference for making decompression venting valve 5 in a certain range, will not cause
Larger flow loss；
D. when 11 underfed of main line, controller 10 is by increasing electric control valve（C1、C2、C3）Aperture, reduction subtracts
The pressure difference for pressing pressure maintaining valve 5, for increasing the flow of main line 11, when 11 flow of main line is excessive, reverse operating motorized adjustment
Valve（C1、C2、C3）With decompression venting valve 5;
E. when water tender A3 water-holding quantities will exhaust, the pressure reduction in branch B3, controller 10 controls the electronic of B3 branch road
Regulating valve C3 apertures reduce until closing, controls remaining branch（B1、B2）Electric control valve on pipeline（C1、C2）Aperture increases
Greatly, and unlatching water tender A4 is synchronized, water tender A3 and water tender A4 is enable to realize synchronism switching；
F. the step of progress of controller 10 b, c and d is carried out.
Description of the invention provides for the sake of example and description, and is not exhaustively or will be of the invention
It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches
It states embodiment and is to more preferably illustrate the principle of the present invention and practical application, and those skilled in the art is enable to manage
Various embodiments with various modifications of the solution present invention to design suitable for special-purpose.
Claims (4)
1. a kind of gathering liquid-supplying system, including water tender for fire fighting truck（A）, branch（B）, gather pipeline（4）, controller
（10）And main line（11）；It is characterized in that：The water tender（A）There is multiple, water tender（A）Pass through corresponding branch（B）It adopts
With mode in parallel and gather pipeline（4）Connection；The branch（B）It is equipped with electric control valve（C）, pressure transmitter（D）And
Non-return valve（E）；It is described to gather pipeline（4）With main line（11）Connection, main line（11）On successively be equipped with decompression venting valve（5）、
5th pressure transmitter（6）, electromagnetic flowmeter（7）, vehicle-mounted centrifugal pump（8）And fire monitor（9）；The controller（10）Respectively with
Electric control valve（C）, pressure transmitter（D）, decompression venting valve（5）, the 5th pressure transmitter（6）And electromagnetic flowmeter（7）Even
It connects.
2. according to claim 1 gather liquid-supplying system for fire fighting truck, it is characterised in that：The controller（10）It adopts
Use PID controller.
3. gathering liquid-supplying system as described in claim 1, it is characterised in that：The decompression venting valve（5）Equipped with pilot valve, control
Device（10）It is connect with pilot valve by electromagnetic control apparatus.
4. a kind of based on the operating method for gathering liquid-supplying system described in claim 1, feature includes the following steps：
A. electric control valve is kept（C1、C2、C3）Minimum aperture, open water tender successively（A1、A2、A3）Fire pump;
B. controller（10）According to branch pressure transmitter（D1、D2、D3）Value is to electric control valve（C1、C2、C3）Carry out aperture
It adjusts, under the premise of ensureing flow, keeps the differing pressure in branch smaller;
C. simultaneously controller（10）According to the pressure transmitter of branch road（D1、D2、D3）And main line（11）On the 5th pressure
Transmitter（6）Numerical value, adjust automatically setup pressure value makes decompression venting valve（5）Front and back pressure difference in a certain range,
It will not lead to larger flow loss；
D. work as main line（11）When underfed, controller（10）By increasing electric control valve（C1、C2、C3）Aperture, subtract
Small decompression venting valve（5）Pressure difference, for increasing main line（11）Flow, work as main line（11）It is reversed to grasp when flow is excessive
Make electric control valve（C1、C2、C3）And decompression venting valve（5）;
E. water tender（A3）When water-holding quantity will exhaust, branch（B3）In pressure reduction, controller（10）Control（B3）Branch
On electric control valve（C3）Aperture reduces until closing, controls remaining branch（B1、B2）Electric control valve on pipeline（C1、
C2）Aperture increases, and synchronous unlatching water tender（A4）, make water tender（A3）And water tender（A4）It can realize synchronism switching；
F. controller（10）The step of carrying out b, c and d carries out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810479091.XA CN108671448B (en) | 2018-05-18 | 2018-05-18 | Centralized liquid supply system for fire fighting truck and operation method |
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| CN201810479091.XA CN108671448B (en) | 2018-05-18 | 2018-05-18 | Centralized liquid supply system for fire fighting truck and operation method |
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| CN108671448A true CN108671448A (en) | 2018-10-19 |
| CN108671448B CN108671448B (en) | 2020-10-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170133A (en) * | 2019-06-25 | 2019-08-27 | 徐工消防安全装备有限公司 | Fire-fighting liquid-supplying system and control method |
| CN112023316A (en) * | 2020-08-24 | 2020-12-04 | 国网新疆电力有限公司检修公司 | Intelligent water-saving type transformer and reactor fire extinguishing system and fire extinguishing method thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09154974A (en) * | 1995-12-06 | 1997-06-17 | Tohatsu Corp | Relay operating control for a succession of transportable fire pumps and pumps to be used in this operation |
| CN201502074U (en) * | 2009-09-03 | 2010-06-09 | 格兰富水泵(苏州)有限公司 | Digital pipe network laminated water supply equipment |
| CN202370039U (en) * | 2011-12-06 | 2012-08-08 | 上海华虹Nec电子有限公司 | Water supply system used for semiconductor production |
| CN202440876U (en) * | 2012-02-24 | 2012-09-19 | 周刚 | Intelligent pipe network control system |
| CN103088872A (en) * | 2013-02-01 | 2013-05-08 | 天津大学 | Water supplying system for flow device |
| CN202925609U (en) * | 2012-10-19 | 2013-05-08 | 浙江方圆造船有限公司 | Energy-saving type water supply device capable of automatically regulating speeds |
| CN203160317U (en) * | 2013-02-19 | 2013-08-28 | 河南环通电气有限责任公司 | Double-closed-loop automatic constant-pressure water supply control device of parallelly-connected pipe network |
| CN203874326U (en) * | 2014-06-10 | 2014-10-15 | 天津龙盛世博安全设备有限公司 | Large-flow remote combination mobile fire-extinguishing water supply device for fire protection |
| CN105022418A (en) * | 2015-08-04 | 2015-11-04 | 衡阳中微科技开发有限公司 | Method for stabilization of air flow of negative pressure pneumatic transport system through flow automatic regulator |
| CN206034534U (en) * | 2016-08-10 | 2017-03-22 | 北京诚益通控制工程科技股份有限公司 | Pressure automatically regulated water reticulation system |
| CN107390520A (en) * | 2017-06-27 | 2017-11-24 | 江苏大学镇江流体工程装备技术研究院 | A kind of fire fighting supply pumping station controlling system and its design method |
-
2018
- 2018-05-18 CN CN201810479091.XA patent/CN108671448B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09154974A (en) * | 1995-12-06 | 1997-06-17 | Tohatsu Corp | Relay operating control for a succession of transportable fire pumps and pumps to be used in this operation |
| CN201502074U (en) * | 2009-09-03 | 2010-06-09 | 格兰富水泵(苏州)有限公司 | Digital pipe network laminated water supply equipment |
| CN202370039U (en) * | 2011-12-06 | 2012-08-08 | 上海华虹Nec电子有限公司 | Water supply system used for semiconductor production |
| CN202440876U (en) * | 2012-02-24 | 2012-09-19 | 周刚 | Intelligent pipe network control system |
| CN202925609U (en) * | 2012-10-19 | 2013-05-08 | 浙江方圆造船有限公司 | Energy-saving type water supply device capable of automatically regulating speeds |
| CN103088872A (en) * | 2013-02-01 | 2013-05-08 | 天津大学 | Water supplying system for flow device |
| CN203160317U (en) * | 2013-02-19 | 2013-08-28 | 河南环通电气有限责任公司 | Double-closed-loop automatic constant-pressure water supply control device of parallelly-connected pipe network |
| CN203874326U (en) * | 2014-06-10 | 2014-10-15 | 天津龙盛世博安全设备有限公司 | Large-flow remote combination mobile fire-extinguishing water supply device for fire protection |
| CN105022418A (en) * | 2015-08-04 | 2015-11-04 | 衡阳中微科技开发有限公司 | Method for stabilization of air flow of negative pressure pneumatic transport system through flow automatic regulator |
| CN206034534U (en) * | 2016-08-10 | 2017-03-22 | 北京诚益通控制工程科技股份有限公司 | Pressure automatically regulated water reticulation system |
| CN107390520A (en) * | 2017-06-27 | 2017-11-24 | 江苏大学镇江流体工程装备技术研究院 | A kind of fire fighting supply pumping station controlling system and its design method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170133A (en) * | 2019-06-25 | 2019-08-27 | 徐工消防安全装备有限公司 | Fire-fighting liquid-supplying system and control method |
| CN112023316A (en) * | 2020-08-24 | 2020-12-04 | 国网新疆电力有限公司检修公司 | Intelligent water-saving type transformer and reactor fire extinguishing system and fire extinguishing method thereof |
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|---|---|
| CN108671448B (en) | 2020-10-16 |
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