CN108671448B - Centralized liquid supply system for fire fighting truck and operation method - Google Patents
Centralized liquid supply system for fire fighting truck and operation method Download PDFInfo
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- CN108671448B CN108671448B CN201810479091.XA CN201810479091A CN108671448B CN 108671448 B CN108671448 B CN 108671448B CN 201810479091 A CN201810479091 A CN 201810479091A CN 108671448 B CN108671448 B CN 108671448B
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- 239000007788 liquid Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- 230000001105 regulatory effect Effects 0.000 claims abstract description 34
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 31
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000008400 supply water Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C27/00—Fire-fighting land vehicles
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- 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
The invention discloses a gathering liquid supply system for a fire fighting truck, which comprises a water supply truck, a branch, a gathering pipeline, a controller and a main pipeline, wherein the water supply truck is connected with the branch; the water supply vehicles are connected with the gathering pipeline in a parallel mode through corresponding branches; the branch is provided with an electric regulating valve, a pressure transmitter and a check valve; the gathering pipeline is connected with the main pipeline, and a pressure reducing and stabilizing valve, a fifth pressure transmitter, an electromagnetic flowmeter, a vehicle-mounted centrifugal pump and a fire monitor are sequentially arranged on the main pipeline; the controller is respectively connected with the electric regulating valve, the pressure transmitter, the pressure reducing and stabilizing valve, the fifth pressure transmitter and the electromagnetic flowmeter. The invention can ensure the continuous and stable water use of the vehicle-mounted pump of the fire engine, can meet various water use requirements according to the size of a fire scene, and is particularly suitable for large-flow and high-pressure occasions required in large-scale fire disasters. The invention fully utilizes the pressure provided by the water supply vehicle to impact part of the power of the vehicle-mounted pump of the fire fighting vehicle, thereby saving energy.
Description
Technical Field
The invention relates to the field of fire-fighting water supply systems, in particular to a centralized liquid supply system of a fire-fighting truck-mounted pump and an operation method.
Background
Along with the large-scale and rapid development of cities in China, people gather, living communities and high-rise buildings are increasing day by day, and urban fire fighting is facing new challenges. At present, urban fire engines face the problems of overhigh floor, narrow road and the like, and a vehicle-mounted fire-fighting system is single in water supply form, poor in water supply capacity and incapable of meeting the continuity of water supply in a limited space position; the requirements of the large-scale fire scene on the continuity and the stability of high-pressure and large-flow liquid supply cannot be met.
In the existing water supply technology, a method for supplying water to a fire fighting truck by a plurality of water supply trucks is to supply water to a simple water storage tank through the simple water storage tank, namely the water supply trucks, and a pump on a fire fighting truck absorbs the water in the simple water storage tank for fire extinguishing. However, in the prior art, the operation is inconvenient, the capacity of the simple water storage tank is limited, a certain time is needed for filling water into the water storage tank, the valuable rescue time is wasted, and a certain pressure waste is caused by no way of utilizing the water pressure of a water supply vehicle.
Disclosure of Invention
Based on the problems in the prior art, the invention provides a centralized liquid supply system of a fire fighting truck-mounted pump, which is used for the working condition that a plurality of water supply trucks supply water to one fire fighting truck-mounted pump, and ensures the stability and the continuity of the pressure and the flow of the water supply.
The invention provides a gathering liquid supply system for a fire fighting truck, which comprises a water supply truck, a branch, a gathering pipeline, a controller and a main pipeline, wherein the branch is connected with the water supply truck; the water supply vehicles are connected with the gathering pipeline in a parallel mode through corresponding branches; the branch is provided with an electric regulating valve, a pressure transmitter and a check valve; the gathering pipeline gathers multiple paths of water into one path of water, has various structures, adopts a simple detachable modular structure according to the fluid impact rule in the parallel connection process of multiple pumps, and has a diameter far larger than that of a branch; the gathering pipeline is connected with the main pipeline, and a pressure reducing and stabilizing valve, a fifth pressure transmitter, an electromagnetic flowmeter, a vehicle-mounted centrifugal pump and a fire monitor are sequentially arranged on the main pipeline; the controller is respectively connected with the electric regulating valve, the pressure transmitter, the pressure reducing and stabilizing valve, the fifth pressure transmitter and the electromagnetic flowmeter;
the electric regulating valve can regulate the opening of the valve according to the input signal; the electromagnetic flowmeter and the pressure transmitter can output pressure and flow signals; the pressure at the outlet of the pressure reducing and stabilizing valve is constant and cannot be changed due to the change of the inlet pressure and the flow, and the outlet pressure of the pressure reducing and stabilizing valve can be adjusted within a certain range;
the controller has the main functions of comparing the branch flow and pressure with the main pipeline flow and pressure value and controlling the electric regulating valve to regulate the opening according to the comparison result; the controller is internally provided with a control device of a pressure reducing and stabilizing valve, and the pressure value of an outlet can be input on a panel, and the pressure reducing and stabilizing valve can be automatically adjusted.
As an improvement, the controller adopts a PID controller.
As an improvement, the pressure reducing and stabilizing valve is provided with a pilot valve, and the controller is connected with the pilot valve through an electromagnetic control device.
The invention also provides an operation method of the centralized liquid supply system, which comprises the following steps:
a. keeping the opening degree of the electric regulating valve to be minimum, and sequentially starting a fire pump of the water supply vehicle;
b. the controller adjusts the opening of the electric regulating valve according to the branch pressure transmitter value, and keeps the pressure difference in the branch smaller on the premise of ensuring the flow;
c. meanwhile, the controller automatically adjusts the set pressure value according to the numerical values of the pressure transmitter on the branch pipeline and the fifth pressure transmitter on the main pipeline, so that the pressure difference between the front and the rear of the pressure reducing and stabilizing valve is in a certain range, and larger flow loss cannot be caused;
d. when the flow of the main pipeline is insufficient, the controller reduces the pressure difference of the pressure reducing and stabilizing valve by increasing the opening of the electric regulating valve so as to increase the flow of the main pipeline, and when the flow of the main pipeline is overlarge, the electric regulating valve and the pressure reducing and stabilizing valve are operated reversely;
e. when the water storage amount of the water supply vehicle is about to be exhausted, the pressure in the branch is reduced, the controller controls the opening degree of the electric regulating valves on the branch to be reduced until the branch is closed, controls the opening degree of the electric regulating valves on the pipelines of the other branches to be increased, and synchronously opens the water supply vehicle, so that the water supply vehicle and the water supply vehicle can realize synchronous switching;
f. the controller performs the steps of b, c and d.
In the invention, firstly, the electric regulating valves of all branches are opened to the minimum opening degree; then according to the pressure and the flow on the main convergence path, the opening of the electric regulating valve is controlled by the controller, and the pressure and the flow on the main convergence path are further regulated; when the water amount of a certain water supply vehicle is close to the bottom limit, the flow and the pressure on the branch line are gradually reduced, and in order to ensure that the flow on the main pipeline is converged, a new water supply vehicle is required to be added for replacing the flow, so that the continuous stability of the pressure and the flow of the main pipeline is ensured; in the switching process of the water supply vehicles, in order to ensure the stable flow of the main pipeline, the opening of the electric regulating valve is further opened, the newly added valves of the branch circuits of the water supply vehicles are synchronously opened, and the water quantity provided by the water supply vehicles which are about to be exhausted is filled;
has the advantages that: the centralized liquid supply system for the fire fighting truck can ensure the continuity and stability of water for the vehicle-mounted pump of the fire fighting truck, can meet various water requirements according to the size of a fire scene, and is particularly suitable for large-flow and high-pressure occasions required in large-scale fire disasters. Compared with the prior art, the device has the advantages that the occupied area is small, the preparation time is not needed, the device can be put into use in real time, and the rescue time is prolonged; meanwhile, the pressure provided by the water supply vehicle is fully utilized, and part of power of the vehicle-mounted pump of the fire fighting vehicle is flushed, so that energy is saved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: a1, a first water supply vehicle, A2, a second water supply vehicle, A3, a third water supply vehicle, A4, a fourth water supply vehicle, B1, a first branch, B2, a second branch, B3, a third branch, B4, a fourth branch, C1, a first electric regulating valve, C2, a second electric regulating valve, C3, a third electric regulating valve, C4, a fourth electric regulating valve, D1, a first pressure transmitter, D2, a second pressure transmitter, D3, a third pressure transmitter, D4, a fourth pressure transmitter, E1, a first check valve, E2, a second check valve, E3, a third check valve, E4, a fourth check valve, 4, a gathering pipeline, 5, a pressure reducing and stabilizing valve, 6, a fifth pressure transmitter, 7, an electromagnetic flowmeter, 8, a vehicle-mounted main pipe, 9, a fire fighting cannon, 10, a controller, 11, and a gathering pipeline.
Detailed Description
Taking water supply vehicles A of the same type and the same model as an example, the performance of each water supply vehicle A is rated flow 15L/s and rated pressure 1MPa, and the rated flow of a vehicle-mounted centrifugal pump 8 of a fire fighting vehicle is rated flow 40L/s and rated pressure 2.5 MPa.
As shown in FIG. 1, the system for centralized liquid supply of a fire fighting truck comprises four water supply trucks (A1, A2, A3 and A4), four branches (B1, B2, B3 and B4), a centralized pipeline 4, a controller 10 and a main pipeline 11; four water supply vehicles (A1, A2, A3 and A4) are connected with the gathering pipeline 4 in a parallel mode through corresponding branches (B1, B2, B3 and B4); the four branches (B1, B2, B3 and B4) are provided with four electric regulating valves (C1, C2, C3 and C4), four pressure transmitters (D1, D2, D3 and D4) and four check valves (E1, E2, E3 and E4); the gathering pipeline 4 is connected with a main pipeline 11, and a pressure reducing and stabilizing valve 5, a fifth pressure transmitter 6, an electromagnetic flowmeter 7, a vehicle-mounted centrifugal pump 8 and a fire monitor 9 are sequentially arranged on the main pipeline 11; the controller 10 adopts a PID controller, and the controller 10 is respectively connected with the electric regulating valves (C1, C2, C3 and C4), the pressure transmitters (D1, D2, D3 and D4), the fifth pressure transmitter 6 and the electromagnetic flowmeter 7; the pressure reducing and stabilizing valve 5 is provided with a pilot valve, and the controller 10 is connected with the pilot valve through an electromagnetic control device.
In the embodiment, the water supply vehicles (A1, A2 and A3) are normally started to supply water and are used for meeting the water consumption of the vehicle-mounted centrifugal pump 8 of the fire engine; the water supply vehicle A4 is standby, when one of the three water supply vehicles (A1, A2 and A3) is used up, the water supply vehicle A4 is used for replacing water supply, and the water consumption of the fire fighting vehicle-mounted pump 8 is guaranteed.
The specific process is as follows: keeping the opening degree of the electric regulating valve C to be minimum, sequentially starting the fire pumps of the water supply vehicle, wherein the check valve E is used for preventing water from flowing backwards to a branch B of the subsequently started fire pump of the water supply vehicle; the pressure water is conveyed to the gathering pipeline 4 through the branches B with different lengths, and the water from the different branches B in the gathering pipeline 4 is gathered and then reaches the inlet of the pressure reducing and stabilizing valve 5; measuring the pressure and flow of the water through the outlet of the pressure reducing and stabilizing valve 5 using a fifth pressure transducer 6 and an electromagnetic flow meter 7 for feedback to the controller 10; then reaches the inlet of a vehicle-mounted pump 8 of the fire engine, and is pumped into a fire monitor 9 through the vehicle-mounted centrifugal pump 8 to extinguish fire.
In this embodiment, because of the difference in the length of the water hose in the branch circuit B, the pipelines in the water supply vehicle a are different, resulting in different liquid resistance, and the opening degree of the electric control valve C needs to be adjusted through the controller 10 according to the pressure measured by the branch circuit pressure transmitter D, so that on the premise of ensuring the flow rate, the pressure difference in the branch circuit B is kept small, and the backflow cannot be caused.
In this embodiment, the outlet pressure of the pressure reducing and stabilizing valve 5 does not change due to the change of the inlet pressure, and the outlet pressure can keep constant pressure after the pilot valve of the pressure reducing and stabilizing valve 5 is adjusted to set a certain pressure value. In order to reduce the flow change caused by pressure stabilization, the controller 10 is required to adjust the set pressure value according to the values of the pressure transmitter D on the branch line B and the fifth pressure transmitter 6 on the main line 11, so that the pressure difference between the front and the rear of the pressure reducing and stabilizing valve 5 is within a certain range, and a large flow loss cannot be caused. The electromagnetic flowmeter 7 is used for measuring the flow of the main pipeline 11, when the flow of the main pipeline 11 is insufficient, the controller 10 reduces the pressure difference of the pressure reducing and stabilizing valve 5 by increasing the opening degree of the electric regulating valve C to increase the flow of the main pipeline 11, and when the flow of the main pipeline 11 is overlarge, the electric regulating valve C and the pressure reducing and stabilizing valve 5 are operated reversely.
When the water storage amount of the water supply vehicle A3 is about to be exhausted in the embodiment, the pressure in the branch B3 is reduced, the controller 10 controls the opening degree of the electric control valve C3 on the branch B3 to be reduced until the branch B3 is closed, controls the opening degrees of the electric control valves C1 and C2 on the pipelines of the rest branches B1 and B2 to be increased, and synchronously opens the water supply vehicle A4, so that the water supply vehicle A3 and the water supply vehicle A4 can realize synchronous switching. In the switching process, the controller 10 adjusts the set pressure value according to the values of the pressure transmitter D on each branch B and the fifth pressure transmitter 6 of the main pipeline 11, so that the pressure difference between the front and the rear of the pressure reducing and stabilizing valve 5 is within a certain range, and large flow loss cannot be caused. According to the measured value of the electromagnetic flowmeter 7, when the flow of the main pipeline is overlarge, the controller 10 controls the opening degree of the electric control valve C on each branch pipeline to be reduced, so that the flow of the main pipeline 11 is reduced to the required value of the vehicle-mounted centrifugal pump 8.
The invention provides an operation method of a gathering liquid supply system, which comprises the following steps:
a. keeping the opening degree of the electric regulating valves (C1, C2 and C3) to be minimum, and sequentially starting fire pumps of the water supply vehicles (A1, A2 and A3);
b. the controller 10 adjusts the opening degree of the electric regulating valves (C1, C2 and C3) according to the branch pressure transmitters (D1, D2 and D3), and on the premise of ensuring the flow rate, the pressure difference in the branches is kept small;
c. meanwhile, the controller 10 automatically adjusts the set pressure value according to the values of the pressure transmitters (D1, D2 and D3) on the branch circuit and the fifth pressure transmitter 6 on the main pipeline 11, so that the pressure difference between the front and the rear of the pressure reducing and stabilizing valve 5 is in a certain range, and large flow loss cannot be caused;
d. when the flow of the main pipeline 11 is insufficient, the controller 10 reduces the pressure difference of the pressure reducing and stabilizing valve 5 by increasing the opening degree of the electric regulating valves (C1, C2 and C3) to increase the flow of the main pipeline 11, and when the flow of the main pipeline 11 is overlarge, reversely operates the electric regulating valves (C1, C2 and C3) and the pressure reducing and stabilizing valve 5;
e. when the water storage amount of the water supply vehicle A3 is about to be exhausted, the pressure in the branch B3 is reduced, the controller 10 controls the opening degree of an electric control valve C3 on the branch B3 to be reduced until the opening degree is closed, controls the opening degrees of electric control valves C1 and C2 on pipelines of the other branches B1 and B2 to be increased, and synchronously opens the water supply vehicle A4, so that the water supply vehicle A3 and the water supply vehicle A4 can realize synchronous switching;
f. the controller 10 performs the steps of b, c and d.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (1)
1. An operation method of a centralized liquid supply system for a fire fighting truck is characterized by comprising the centralized liquid supply system for the fire fighting truck; the gathering liquid supply system for the fire fighting truck comprises a water supply truck (A), a branch (B), a gathering pipeline (4), a controller (10) and a main pipeline (11); the water supply vehicles (A) are connected with the gathering pipeline (4) in a parallel mode through corresponding branches (B); an electric regulating valve (C), a pressure transmitter (D) and a check valve (E) are arranged on the branch (B); the gathering pipeline (4) is connected with a main pipeline (11), and a pressure reducing and stabilizing valve (5), a fifth pressure transmitter (6), an electromagnetic flowmeter (7), a vehicle-mounted centrifugal pump (8) and a fire monitor (9) are sequentially arranged on the main pipeline (11); the controller (10) is respectively connected with the electric regulating valve (C), the pressure transmitter (D), the pressure reducing and stabilizing valve (5), the fifth pressure transmitter (6) and the electromagnetic flowmeter (7);
the method of operating the aggregate liquid supply system for a fire fighting vehicle further comprises the steps of:
a. the fire pump of the water supply vehicle (A1, A2, A3) is started in sequence while the minimum opening degree of the electric control valves (C1, C2, C3) is maintained;
b. the controller (10) adjusts the opening degree of the electric regulating valves (C1, C2 and C3) according to the branch pressure transmitters (D1, D2 and D3), and on the premise of ensuring the flow rate, the pressure difference in the branches is kept small;
c. meanwhile, the controller (10) automatically adjusts the set pressure value according to the numerical values of the pressure transmitters (D1, D2 and D3) on the branch and the fifth pressure transmitter (6) on the main pipeline (11), so that the pressure difference between the front and the back of the pressure reducing and stabilizing valve (5) is in a certain range, and large flow loss cannot be caused;
d. when the flow of the main pipeline (11) is insufficient, the controller (10) reduces the pressure difference of the pressure reducing and stabilizing valve (5) by increasing the opening degree of the electric regulating valves (C1, C2 and C3) to increase the flow of the main pipeline (11), and when the flow of the main pipeline (11) is overlarge, the electric regulating valves (C1, C2 and C3) and the pressure reducing and stabilizing valve (5) are reversely operated;
e. when the water storage amount of the water supply vehicle (A3) is about to be exhausted, the pressure in the branch (B3) is reduced, the controller (10) controls the opening degree of the electric control valve (C3) on the branch (B3) to be reduced until the branch is closed, controls the opening degrees of the electric control valves (C1 and C2) on pipelines of the other branches (B1 and B2) to be increased, and synchronously opens the water supply vehicle (A4) to ensure that the water supply vehicle (A3) and the water supply vehicle (A4) can realize synchronous switching;
f. the controller (10) proceeds as steps b, c and d.
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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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| CN110170133B (en) * | 2019-06-25 | 2024-09-06 | 徐工消防安全装备有限公司 | Fire-fighting liquid supply 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN105022418B (en) * | 2015-08-04 | 2018-12-14 | 衡阳中微科技开发有限公司 | Stablize the method for negative-pressure pneumatic transmission system air flow rate by automatic flow rate adjusting device |
| 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 |
| CN107390520B (en) * | 2017-06-27 | 2019-10-01 | 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 |
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