CN-122006193-A - Dynamic differential pressure regulating double-medium fire-fighting system, fire truck and control method

CN122006193ACN 122006193 ACN122006193 ACN 122006193ACN-122006193-A

Abstract

The invention relates to the technical field of fire control, in particular to a dynamic pressure difference adjusting double-medium fire control system, a fire engine and a control method. The dynamic pressure difference adjusting double-medium fire-fighting system comprises a water tank, a fire monitor, a water outlet device, a foam tank and a central controller, wherein a water pump and a water pressure sensor are arranged on a main waterway, foam pumps are arranged on a foam main pipe, foam pressure sensors are arranged on branch pipelines and connecting pipelines, the central controller is respectively and electrically connected with the foam pumps, the water pump, the water pressure sensor and the foam pressure sensor, and the central controller is configured to be capable of adjusting the foam pumps and the water pump so that the pressure value of the foam pressure sensor is larger than that of the water pressure sensor. Therefore, the foam can be guaranteed to be accurately sucked and mixed, and the multi-scene fire extinguishing requirement is met.

Inventors

WU DONG
MA YULONG
SHE YUNTAO
CAI JINCHENG
LIANG ZHIQIANG
HUANG WENZHENG

Assignees

四川川消消防车辆制造有限公司

Dates

Publication Date: 20260512
Application Date: 20260212

Claims (11)

1. A dynamic pressure differential accommodating dual medium fire protection system comprising: the fire monitor comprises a water tank (11), a fire monitor (13), a water outlet device (14), a foam tank (15) and a central controller; The water outlet device (14) comprises a foam mixed liquid outlet and a pure water outlet, wherein the outlet of the water tank (11) is connected with the inlet of a main waterway (110), the outlet of the main waterway (110) is respectively connected with the fire monitor (13) through a gun tube waterway (130) and is connected with the pure water outlet of the water outlet device (14) through a branch waterway (120), and the main waterway (110) is provided with a water pump (12) and a water pressure sensor (112); The outlet of the foam tank (15) is connected with the inlet of the foam main pipe (210), and the foam main pipe (210) can be connected with the foam mixed liquid outlet of the water outlet device (14) through a separation pipeline (220) and is connected with the fire monitor (13) through a connecting pipeline (310); foam pumps (16) are arranged on the foam main pipe (210), and foam pressure sensors (232) are arranged on the branch pipelines (220) and the connecting pipelines (310); The central controller is electrically connected with the foam pump (16), the water pump (12), the water pressure sensor (112) and the foam pressure sensor (232) respectively; The central controller is configured to enable a pressure value of the foam pressure sensor to be greater than a pressure value of a water pressure sensor (112) by adjusting the foam pump (16) and the water pump (12).
2. The dynamic pressure differential accommodating dual medium fire protection system of claim 1, wherein: The throat parts of the venturi tube of the foam mixed liquid outlet and the venturi tube of the fire monitor (13) are respectively provided with a first throat pressure sensor (610), and the throat part of the venturi tube of the liquid outlet of the fire monitor (13) is provided with a second throat pressure sensor (620); A first foam pressure sensor (710) is arranged on the branch pipeline (220), and a second foam pressure sensor (720) is arranged on the connecting pipeline (310); The central controller is configured to be able to adjust the pressure of the fire monitor (13) and the water outlet device (14) by means of the foam pump (16) and the water pump (12) so that the pressure value of the second foam pressure sensor (720) is greater than the pressure value of the second throat pressure sensor (620); And/or the central controller is configured to be able to adjust the pressure of the fire monitor (13) and the water outlet device (14) by means of the foam pump (16) and the water pump (12) such that the pressure value of the first foam pressure sensor (710) is greater than the pressure value of the first throat pressure sensor (610).
3. The dynamic pressure differential accommodating dual medium fire protection system of claim 2, wherein: The fire monitor (13) is provided with a first electric control valve (800) electrically connected with the central controller; The central controller is configured to adjust the opening of the first electronically controlled valve (800) and/or to adjust the rotational speed of the foam pump (16) to achieve a pressure value of the second foam pressure sensor (720) that is greater than a pressure value of the second throat pressure sensor (620).
4. The dynamic pressure differential accommodating dual medium fire protection system of claim 2, wherein: The central controller is configured to adjust a rotational speed of the foam pump (16) to achieve a pressure value of the first foam pressure sensor (710) that is greater than a pressure value of the first throat pressure sensor (610).
5. The dynamic pressure differential accommodating dual medium fire protection system of claim 2, wherein: The central controller is configured to adjust the pressure at the fire monitor (13) and/or the pressure at the foam mixture outlet of the water outlet device (14) when simultaneously adjusting the pressure state of the foam main pipe (210), the branch pipe (220).
6. The dynamic pressure differential accommodating dual medium fire protection system of claim 3, wherein: -at the foam mix outlet, there is a pressure difference Δp1 between the first foam pressure sensor (710) and the first throat pressure sensor (610); -at the outlet of the fire monitor (13), a pressure difference Δp2 is present between the second foam pressure sensor (720) and the second throat pressure sensor (620); And the central controller is configured to adjust an increase in the opening of the first electronically controlled valve (800) or an increase in the rotational speed of the foam pump (16) to adjust the pressure value of Δp1 or Δp2.
7. The dynamic pressure differential accommodating dual medium fire protection system of claim 6, wherein: When the value of delta P1 or delta P2 is less than or equal to a preset calibration value, the central controller is configured to adjust the increase of the opening degree of the first electric control valve (800) to be +/-2% or adjust the increase of the rotating speed of the foam pump (16) to be +/-20 r/min; When the value of Δp1 or Δp2 > the preset calibration value, the central controller is configured to adjust the increase in the opening of the first electronically controlled valve (800) to ±5% or to adjust the increase in the rotational speed of the foam pump (16) to ±50r/min.
8. The dynamic pressure differential accommodating dual medium fire protection system of claim 2, wherein: The central controller is configured to cause a pressure value of the first throat pressure sensor (610) to be greater than a pressure value of the second throat pressure sensor (620).
9. The dynamic pressure differential accommodating dual medium fire protection system of claim 8, wherein: -at the outlet of the fire monitor (13), there is a pressure difference Δp2 between the second foam pressure sensor (720) and the second throat pressure sensor (620); -a differential pressure Δp3 between the first throat pressure sensor (610) and the second throat pressure sensor (620); When Δp3 is smaller than a preset value, the central controller is configured to cause the foam mixture outlet of the water outlet device (14) to form a local negative pressure by raising the pressure Δp2 at the corresponding fire monitor (13).
10. A fire engine comprising the dynamic pressure differential accommodating dual medium fire protection system of any one of claims 1-9.
11. A control method, characterized in that it adjusts a dual medium fire protection system based on the dynamic pressure differential of any one of claims 1-9; the control method comprises the following steps that a delta P1 is arranged between a first foam pressure sensor (710) and a first throat pressure sensor (610) at the outlet of the foam mixed liquid, a differential pressure delta P2 is arranged between a second foam pressure sensor (720) and a second throat pressure sensor (620) at the outlet of the fire monitor (13), a differential pressure delta P3 is arranged between the first throat pressure sensor (610) and the second throat pressure sensor (620), a connecting part of a connecting pipeline (310) and a gun barrel waterway (130), a connecting part of a branch waterway (120) and a water outlet device (14) and a connecting part of a branch pipeline (220) and the water outlet device (14) are respectively provided with one-way valves (17), and the control method at least comprises the following steps: s1, the central controller sets Δp1=a first set value, Δp2=a second set value, and Δp3=a third set value; s2, starting a foam pump (16) and opening the one-way valve (17); S3, the central controller monitors delta P1 and delta P2 in real time, and adjusts delta P1 to a first set value and delta P2 to a second set value; And S4, the central controller adjusts delta P3 to a third set value.

Description

Dynamic differential pressure regulating double-medium fire-fighting system, fire truck and control method Technical Field The invention relates to the technical field of fire control, in particular to a dynamic pressure difference adjusting double-medium fire control system, a fire engine and a control method. Background In the fire-fighting emergency rescue scene, water and foam are two core fire-extinguishing media, wherein the water mainly realizes fire extinguishment through cooling effect, and the foam has irreplaceable fire-extinguishing effect on special fires (B type fires) such as oils, chemical industry and the like through covering and asphyxiating effect. The core pain point of the existing fire truck foam system is caused by lack of differential pressure control or inefficiency: When the foam injection device is used, foam needs to be injected into a pipeline of a water system to realize mixing, if the foam pressure is lower than the water pressure, the phenomenon that the water back pressure blocks the injection of the foam (namely, the water pressure is too high, so that water enters the foam pipeline to block the output of foam liquid, and the phenomenon that the foam is not mixed effectively is caused, the existing system is used for adjusting the rotating speed of a foam pump by relying on manual experience, the pressure control hysteresis is strong, and the problems of foam breaking (namely, foam input is stopped) or excessive foam dilution are easy to occur. Specific: 1. The traditional system adopts a fixed foam pump rotating speed, when the water flow pressure fluctuates, the pressure difference (delta P) between foam and water changes along with the fluctuation, and the numerical value of the mixing ratio is often more than +/-3 percent. This results in a differential imbalance leading to a numerical value of the mixing ratio; 2. when the two media share the pipeline, the pure water flow change can interfere with the foam branch pressure difference, further aggravate the mixing ratio fluctuation. Disclosure of Invention The invention aims to provide a dynamic differential pressure regulating dual-medium fire-fighting system, a fire truck and a control method, which can ensure accurate foam suction and mixing and adapt to multi-scene fire-extinguishing requirements. Embodiments of the invention may be implemented as follows: In a first aspect, the invention provides a dynamic differential pressure regulating dual-medium fire-fighting system, comprising a water tank, a fire monitor, a water outlet device, a foam tank and a central controller; the water outlet device comprises a foam mixed liquid outlet and a pure water outlet, wherein the outlet of the water tank is connected with the inlet of a main waterway, the outlet of the main waterway is respectively connected with the fire monitor through a gun tube waterway and the pure water outlet of the water outlet device through a branch waterway, and the main waterway is provided with a water pump and a water pressure sensor; the outlet of the foam tank is connected with the inlet of the foam main pipe, and the foam main pipe can be connected with the foam mixed liquid outlet of the water outlet device through a separation pipeline and the fire monitor through a connecting pipeline respectively; the foam main pipe is provided with a foam pump, and foam pressure sensors are arranged on the branch pipeline and the connecting pipeline; the central controller is respectively and electrically connected with the foam pump, the water pressure sensor and the foam pressure sensor; The central controller is configured to be able to adjust the foam pump and the water pump such that the pressure value of the foam pressure sensor is greater than the pressure value of the water pressure sensor. So can guarantee that the pressure in the foam pipeline (being the foam is responsible for, divide pipeline and connecting tube, and the same, the description is not repeated) is greater than the pressure in the water route pipeline to make the foam can continuously get into the water route pipeline with the mode of malleation and form foam mixed solution, when thus guaranteeing the synchronous output of water-foam double media, foam mixed solution can smoothly, stably mix. In an alternative embodiment, the venturi tubes are arranged in the foam mixed liquid outlet and the liquid outlet of the fire monitor, the throat part of the venturi tube of the foam mixed liquid outlet is provided with a first throat pressure sensor, and the throat part of the venturi tube of the liquid outlet of the fire monitor is provided with a second throat pressure sensor; the first foam pressure sensor is arranged on the branch pipeline, and the second foam pressure sensor is arranged on the connecting pipeline; The central controller is configured to be able to adjust the pressure of the fire monitor and the water outlet device by the foam pump and the water pump so that the pressu