CN110448848B - Range-extending type remote dry powder fire-fighting system and operation method - Google Patents
Range-extending type remote dry powder fire-fighting system and operation method Download PDFInfo
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- CN110448848B CN110448848B CN201910699713.4A CN201910699713A CN110448848B CN 110448848 B CN110448848 B CN 110448848B CN 201910699713 A CN201910699713 A CN 201910699713A CN 110448848 B CN110448848 B CN 110448848B
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
Abstract
The application relates to a range-extending type remote dry powder fire-fighting system and an operation method, wherein the range-extending type remote dry powder fire-fighting system comprises a pressure-resistant powder tank and an inert gas source, one end of a pressure-dividing pipeline is communicated with the inert gas source, the other end of the pressure-dividing pipeline is divided into two branches, one branch is a connecting pipeline, and the connecting pipeline is simultaneously communicated with the pressure-resistant powder tank; one end of the conveying pipeline is communicated with the pressure-resistant powder tank, and the other end of the conveying pipeline is communicated with the conveying terminal; a hopper for conveying the dry powder extinguishing agent is arranged at the top of the pressure-resistant powder tank; the other branch of the pressure dividing pipeline is a pressure increasing pipeline, the pressure increasing pipeline is communicated with the conveying pipeline through at least one communicating pipeline, and one communicating pipeline corresponds to one-way valve; the application can use the dry powder extinguishing agent as the extinguishing medium on the high-altitude fire-fighting platform, fully utilizes the characteristic of light dead weight of the gas-powder two-phase mixed flow of the dry powder medium, ensures that the extinguishing medium easily reaches higher height, and solves the dilemma of high-altitude fire-fighting.
Description
Technical Field
The application relates to a range-extended remote dry powder fire-fighting system and an operation method thereof, belonging to the field of information and automatic control for fire-fighting systems.
Background
With the acceleration of urban modernization progress, more and more high-rise super high-rise buildings are in the city, and compared with the increasingly high-rise buildings, the high-rise building fire rescue faces a dilemma. The main fire extinguishing medium for high-rise fire control is water, which is limited by the high dead weight of the water medium, and the spraying height of the fire-fighting lance and the water cannon is generally less than 50 meters. The high-flow and high-emission fire water monitor has extremely high stability requirements on a carrying platform, the lifting height of the existing domestic ascending fire truck is more concentrated below 68 meters, and only a few cities have hundreds of meters of fire trucks; how to reduce the dead weight of the fire-fighting medium and to improve the height limit of the fire-fighting platform has great social significance and wide application prospect.
The dry powder extinguishing agent is also called as powder extinguishing agent, and can extinguish A, B, C fire; the fire-fighting fire-extinguishing agent is widely applied to fire fighting and extinguishment of oil fields, oil reservoirs, oil refineries, chemical plants, chemical warehouses, ships, airports and industrial and mining enterprises. The gas-powder two-phase mixed flow is formed by using inert gas to drive and carrying the dry powder extinguishing agent by the inert gas, and the remote transmission of the dry powder extinguishing agent can be realized through a pipeline; the specific gravity of the gas-powder two-phase mixed flow is far lower than that of the water medium, so that the gas-powder two-phase mixed flow has the weight advantage of long-distance high-altitude fire-fighting transportation; however, the pipe network type dry powder system is not used for high-altitude fire control at present, and the main reason is that the pipe network type dry powder system is carried out in a one-time pressurizing mode, the transmission distance is limited, the spraying time is short, the fire extinguishing duration is poor, and the requirement of high-altitude fire control is difficult to meet, so that the pipe network type dry powder system is mainly used for initial fire extinguishing of fixed equipment and sites.
Disclosure of Invention
The application provides a range-extending type remote dry powder fire-fighting system and an operation method, which can use a dry powder fire-extinguishing agent as a fire-extinguishing medium on a high-altitude fire-fighting platform, fully utilize the characteristic of light self weight of a gas-powder two-phase mixed flow of the dry powder medium, enable the fire-extinguishing medium to easily reach a higher height and solve the dilemma of high-altitude fire-fighting.
The technical scheme adopted for solving the technical problems is as follows:
a range-extended remote dry powder fire-fighting system,
the pressure-resistant powder tank comprises a pressure-resistant powder tank and an inert gas source, wherein one end of a pressure-dividing pipeline is communicated with the inert gas source, the other end of the pressure-dividing pipeline is divided into two branches, one branch is a connecting pipeline, and the connecting pipeline is simultaneously communicated with the pressure-resistant powder tank;
comprises a conveying pipeline, one end of which is communicated with a pressure-resistant powder tank, and the other end of which is communicated with a conveying terminal;
a hopper for conveying the dry powder extinguishing agent is arranged at the top of the pressure-resistant powder tank;
a pressure reducing valve and a first quick-opening air valve are arranged on the pressure dividing pipeline, a second quick-opening air valve is arranged on the connecting pipeline, a quick-opening ball valve is arranged at a position, close to the pressure-resistant powder tank, of the conveying pipeline, and at least one-way valve is arranged on the conveying pipeline;
the other branch of the pressure dividing pipeline is a pressure increasing pipeline, the pressure increasing pipeline is communicated with the conveying pipeline through at least one communicating pipeline, one communicating pipeline corresponds to one-way valve, and meanwhile, the distance between each one-way valve and the pressure-resistant powder tank is smaller than the distance between the communicating pipeline and the pressure-resistant powder tank;
a third quick-opening air valve is arranged on each communication pipeline;
as a further preferred feature of the application,
the other branch of the pressure dividing pipeline is a pressurizing pipeline, and the pressure dividing pipeline further comprises two connecting pipelines, namely a first connecting pipeline and a second connecting pipeline, wherein one end of each connecting pipeline is communicated with the pressurizing pipeline, and the other end of each connecting pipeline is communicated with the conveying pipeline;
the pressure reducing valve and the first quick-opening air valve are arranged on the pressure dividing pipeline, the second quick-opening air valve is arranged on the connecting pipeline, the quick-opening ball valve and the two one-way valves are sequentially arranged on the conveying pipeline, the first connecting pipeline is positioned between the two one-way valves, and the third quick-opening air valve is arranged on the first connecting pipeline and the second connecting pipeline;
as a further preferred feature of the application,
the hopper is fixed at the top of the pressure-resistant powder tank through the rotary feeder;
the rotary feeder is a spiral feeder;
as a further preferred feature of the application,
the inert gas source comprises at least one high-pressure nitrogen cylinder, wherein the at least one high-pressure nitrogen cylinder is formed by connecting the high-pressure nitrogen cylinders in series, each high-pressure nitrogen cylinder contains 50Lda nitrogen, and the pressure gas quantity is 15Mpa;
as a further preferred feature of the application,
the second quick-opening air valve, the quick-opening ball valve and the third quick-opening air valve are controlled by a signal controller, and a main control chip of the signal controller adopts a floating point type central processing unit TMS320F28335;
as a further preferred feature of the application,
the screw feeder is communicated with the signal controller, and a main control chip of the signal controller adopts a floating point type central processing unit TMS320F28335;
an operation method of a range-extended remote dry powder fire protection system comprises the following steps:
the first step: the pressure-resistant powder tank is not pressurized, the dry powder extinguishing agent is contained in the hopper, the spiral feeder is started, and the pressure-resistant powder tank is charged with the dry powder extinguishing agent;
and a second step of: starting a pressure reducing valve, and reducing the pressure of the inert gas source to a matched pressure;
and a third step of: the first quick-opening air valve is kept normally open, and the pressure dividing pipeline and the pressure boosting pipeline are communicated;
fourth step: the signal controller controls the second quick-opening air valve to be opened, the pressure dividing pipeline is communicated with the connecting pipeline, and the dry powder extinguishing agent put into the pressure-resistant powder tank is mixed with inert gas conveyed by the inert gas source to form a gas-powder two-phase mixed flow state until the internal pressure of the pressure-resistant powder tank is stable;
fifth step: the signal controller controls the second quick-opening valve to be closed, meanwhile, the signal controller controls the quick-opening ball valve to be opened, the pressure-resistant powder tank is communicated with the conveying pipeline, the gas-powder two-phase mixed flow is discharged into the conveying pipeline, after the gas-powder two-phase mixed flow in the pressure-resistant powder tank is emptied, the quick-opening ball valve is closed, and under the action of the one-way valve, the gas-powder two-phase mixed flow is directly conveyed to the conveying terminal;
sixth step: the signal controller controls the third quick-opening air valve to be opened, the pressurizing pipeline and the communicating pipeline are communicated with the conveying pipeline, and the gas-powder two-phase mixed flow is further conveyed to the conveying terminal in the conveying pipeline under the pushing of the newly pressurized inert gas;
seventh step: after the quick-opening ball valve is closed, the signal controller controls the screw feeder to be opened for feeding, and simultaneously, the signal controller controls the second quick-opening air valve to be opened for mixing the dry powder extinguishing agent of the next round with the inert gas conveyed by the inert gas source.
Through the technical scheme, compared with the prior art, the application has the following beneficial effects:
1. the inert gas source provides driving force for the dry powder fire extinguishing system, and the inert gas and the dry powder extinguishing agent are fully mixed to form a gas-powder two-phase mixed flow so as to drive the dry powder extinguishing agent to move;
2. the pressure reducing valve reduces the pressure of the high-pressure inert gas source to proper pressure, and sends the high-pressure inert gas source into the pressurizing pipeline and the connecting pipeline;
3. the first quick-opening air valve and the third quick-opening air valve are control valves of the pressurizing pipeline, and each quick-opening air valve can be independently opened and closed under the control of the signal controller to provide independent driving air flow for each pressurizing section on the conveying pipeline;
4. the pressure-resistant powder tank provides a container for fully mixing and stirring the dry powder extinguishing agent and the inert gas entering the conveying pipeline, so that the dry powder extinguishing agent and the inert gas can form a gas-powder two-phase mixed flow with proper density, and the dry powder extinguishing agent can be conveyed in the conveying pipeline quickly;
5. the hopper of the application provides a feeding container of the dry powder extinguishing agent, so as to ensure the continuous supply of the subsequent dry powder extinguishing agent;
6. the spiral feeder adopts a one-way feeding structure, so that gas powder cannot leak from a feeding port in the pressurizing process of the pressure-resistant powder tank, and meanwhile, continuous dry powder extinguishing agent can be provided for a conveying pipeline;
7. the quick-opening ball valve disclosed by the application is kept in a closed state when the pressure-resistant powder tank is pressurized and mixed, and when the gas-powder mixing is finished, the quick-opening ball valve is quickly opened to quickly discharge a gas-powder two-phase mixed flow in the pressure-resistant powder tank and send the gas-powder two-phase mixed flow into a conveying pipeline;
8. the at least one-way valve ensures the one-way flow of the gas-powder two-phase mixed flow in the conveying pipeline when the pressurizing pipeline is used for sectionalized pressurizing relay;
9. when the system is operated, the pressurizing pipeline always maintains high-pressure filling of inert gas, and a continuous conveying power source is provided for the gas-powder two-phase mixed flow through each sectional quick-opening air valve;
10. the signal controller provided by the application is used for respectively controlling the quick-opening ball valve and each quick-opening air valve, providing time sequence pulse signals for each valve, and sequentially opening the ball valve and each continuous segmented quick-opening air valve in the gas-powder two-phase mixed flow transportation process so as to realize continuous transportation of the gas-powder two-phase mixed flow.
Drawings
The application will be further described with reference to the drawings and examples.
FIG. 1 is a schematic overall construction of a preferred embodiment of the present application;
figure 2 is a waveform diagram of the sequence of signals from the various valves, screw feeders, and ball valves of the preferred embodiment of the present application as controlled by the signal controller.
In the figure: the device comprises an inert gas source 1, a pressure reducing valve 2, a pressure dividing pipeline 3, a first quick-opening gas valve 4, a second quick-opening gas valve 5, a connecting pipeline 6, a pressurizing pipeline 7, a hopper 8, a pressure-resistant powder tank 9, a screw feeder 10, a conveying pipeline 11, a quick-opening ball valve 12, a one-way valve 13, a third quick-opening gas valve 14, a communicating pipeline 15 and a signal controller 16.
Detailed Description
The application will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the application and therefore show only the structures which are relevant to the application.
As shown in fig. 1, the present application includes the following features: the device comprises an inert gas source 1, a pressure reducing valve 2, a pressure dividing pipeline 3, a first quick-opening gas valve 4, a second quick-opening gas valve 5, a connecting pipeline 6, a pressurizing pipeline 7, a hopper 8, a pressure-resistant powder tank 9, a screw feeder 10, a conveying pipeline 11, a quick-opening ball valve 12, a one-way valve 13, a third quick-opening gas valve 14, a communicating pipeline 15 and a signal controller 16.
The application relates to a range-extended remote dry powder fire-fighting system,
the pressure-resistant powder tank comprises a pressure-resistant powder tank and an inert gas source, wherein one end of a pressure-dividing pipeline is communicated with the inert gas source, the other end of the pressure-dividing pipeline is divided into two branches, one branch is a connecting pipeline, and the connecting pipeline is simultaneously communicated with the pressure-resistant powder tank;
comprises a conveying pipeline, one end of which is communicated with a pressure-resistant powder tank, and the other end of which is communicated with a conveying terminal;
a hopper for conveying the dry powder extinguishing agent is arranged at the top of the pressure-resistant powder tank;
a pressure reducing valve and a first quick-opening air valve are arranged on the pressure dividing pipeline, a second quick-opening air valve is arranged on the connecting pipeline, a quick-opening ball valve is arranged at a position, close to the pressure-resistant powder tank, of the conveying pipeline, and at least one-way valve is arranged on the conveying pipeline;
the other branch of the pressure dividing pipeline is a pressure increasing pipeline, the pressure increasing pipeline is communicated with the conveying pipeline through at least one communicating pipeline, one communicating pipeline corresponds to one-way valve, and meanwhile, the distance between each one-way valve and the pressure-resistant powder tank is smaller than the distance between the communicating pipeline and the pressure-resistant powder tank;
a third quick-opening air valve is arranged on each communication pipeline;
preferred embodiments based on the above system are as follows:
the remote dry powder fire-fighting system comprises a pressure-resistant powder tank and an inert gas source, wherein one end of a pressure-dividing pipeline is communicated with the inert gas source, the other end of the pressure-dividing pipeline is divided into two branches, one branch is a connecting pipeline, and the connecting pipeline is simultaneously communicated with the pressure-resistant powder tank;
comprises a conveying pipeline, one end of which is communicated with a pressure-resistant powder tank, and the other end of which is communicated with a conveying terminal;
a hopper for conveying the dry powder extinguishing agent is arranged at the top of the pressure-resistant powder tank;
the other branch of the pressure dividing pipeline is a pressurizing pipeline, and the pressure dividing pipeline further comprises two connecting pipelines, namely a first connecting pipeline and a second connecting pipeline, wherein one end of each connecting pipeline is communicated with the pressurizing pipeline, and the other end of each connecting pipeline is communicated with the conveying pipeline;
the pressure reducing valve and the first quick-opening air valve are arranged on the pressure dividing pipeline, the second quick-opening air valve is arranged on the connecting pipeline, the quick-opening ball valve and the two one-way valves are sequentially arranged on the conveying pipeline, the first connecting pipeline is positioned between the two one-way valves, and the third quick-opening air valve is arranged on the first connecting pipeline and the second connecting pipeline;
preferably, the pressure reducing valve type can be YQD-370.6x25 pressure reducing valves, the first quick-opening air valve, the second quick-opening air valve and the third quick-opening air valve can be ZCFK58-DBS type valves, and the quick-opening ball valve is Q981F quick-opening electric ball valve;
it should be noted that in practice, the transmission pipeline may be divided into a plurality of groups, each group including a third quick-opening valve and a check valve, and in the preferred embodiment of the present application, two sections are preferred.
The inert gas source comprises at least one high-pressure nitrogen cylinder, the at least one high-pressure nitrogen cylinder is formed by connecting the high-pressure nitrogen cylinders in series, each nitrogen cylinder provides 15Mpa of pressure 50Lda of nitrogen, the inert gas source is provided with a safety release valve, and when the pressure of the inert gas source reaches the upper limit due to external environment factors, the pressure is automatically released, so that the safety is ensured;
the pressure reducing valve reduces the pressure of the nitrogen cylinder with the pressure of 15MPa by less than 1.0MPa, and provides a power source for the pressure-resistant powder tank and the pressurizing pipeline;
the first quick-opening air valve, the second quick-opening air valve and the third quick-opening air valve are respectively provided with a quick-opening and quick-closing electromagnetic valve, so that a power source can be quickly provided for the pressure-resistant powder tank and the conveying pipeline section, and the air source can be quickly cut off after the gas-powder two-phase mixed flow is continuously conveyed into the next section;
the quick-opening ball valve adopts an electromagnetic driving mode to control the output of the gas-powder mixed flow in the pressure-resistant powder tank;
the rotary feeder consists of a conveying channel, a screw shaft and a one-way check valve, can continuously convey dry powder medium into the pressure-resistant powder tank, and simultaneously ensures that gas-powder mixed flow in the pressure-resistant powder tank cannot leak from the feeder;
it should be noted that, the rotary feeder in the present application is selected from YCGN-70 rotary feeders, so that no excessive description is made here;
FIG. 2 is a timing diagram of waveforms of a sequence signal generated by a signal controller, wherein the sequence signal can be adjusted according to the flow rate and the flow rate of a gas-powder mixed flow so as to meet the requirements of different application occasions; the signal controller main control chip adopts a high-performance floating point type central processing unit TMS320F28335, the clock frequency is up to 150MHz, various forms of high-speed time sequence signals are provided, and meanwhile, the rapid acquisition of sensor information can be completed.
The operation method based on the fire protection system comprises the following steps:
the first step: the pressure-resistant powder tank is not pressurized, the dry powder extinguishing agent is contained in the hopper, the spiral feeder is started, and the pressure-resistant powder tank is charged with the dry powder extinguishing agent;
and a second step of: starting a pressure reducing valve, and reducing the pressure of the inert gas source to a matched pressure;
and a third step of: the first quick-opening air valve is kept normally open, and the pressure dividing pipeline and the pressure boosting pipeline are communicated;
fourth step: the signal controller controls the second quick-opening air valve to be opened, the pressure dividing pipeline is communicated with the connecting pipeline, and the dry powder extinguishing agent put into the pressure-resistant powder tank is mixed with inert gas conveyed by the inert gas source to form a gas-powder two-phase mixed flow state until the internal pressure of the pressure-resistant powder tank is stable;
fifth step: the signal controller controls the second quick-opening valve to be closed, meanwhile, the signal controller controls the quick-opening ball valve to be opened, the pressure-resistant powder tank is communicated with the conveying pipeline, the gas-powder two-phase mixed flow is discharged into the conveying pipeline, after the gas-powder two-phase mixed flow in the pressure-resistant powder tank is emptied, the quick-opening ball valve is closed, and under the action of the one-way valve, the gas-powder two-phase mixed flow is directly conveyed to the conveying terminal;
sixth step: the signal controller controls the third quick-opening air valve to be opened, the pressurizing pipeline and the communicating pipeline are communicated with the conveying pipeline, and the gas-powder two-phase mixed flow is further conveyed to the conveying terminal in the conveying pipeline under the pushing of the newly pressurized inert gas;
seventh step: after the quick-opening ball valve is closed, the signal controller controls the screw feeder to be opened for feeding, and simultaneously, the signal controller controls the second quick-opening air valve to be opened for mixing the dry powder extinguishing agent of the next round with the inert gas conveyed by the inert gas source.
Based on the fire extinguishing system and the operation method, the extended range type remote dry powder fire extinguishing system can realize remote continuous transmission of dry powder extinguishing agent, and solves the defect of short transmission distance and short spraying time of the traditional pipe network type dry powder system; the limit height of the existing fire-fighting system can be greatly improved by combining with the high-altitude fire-fighting platform. It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" in the present application means that each exists alone or both exist.
"connected" as used herein means either a direct connection between components or an indirect connection between components via other components.
With the above-described preferred embodiments according to the present application as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the description, but must be determined according to the scope of claims.
Claims (1)
1. An operation method of a range-extended remote dry powder fire-fighting system is characterized in that: the extended range type remote dry powder fire-fighting system comprises a pressure-resistant powder tank and an inert gas source, wherein one end of a pressure-dividing pipeline is communicated with the inert gas source, the other end of the pressure-dividing pipeline is divided into two branches, one branch is a connecting pipeline, and the connecting pipeline is simultaneously communicated with the pressure-resistant powder tank;
comprises a conveying pipeline, one end of which is communicated with a pressure-resistant powder tank, and the other end of which is communicated with a conveying terminal;
a hopper for conveying the dry powder extinguishing agent is arranged at the top of the pressure-resistant powder tank;
a pressure reducing valve and a first quick-opening air valve are arranged on the pressure dividing pipeline, a second quick-opening air valve is arranged on the connecting pipeline, a quick-opening ball valve is arranged at a position, close to the pressure-resistant powder tank, of the conveying pipeline, and at least one-way valve is arranged on the conveying pipeline;
the other branch of the pressure dividing pipeline is a pressure increasing pipeline, the pressure increasing pipeline is communicated with the conveying pipeline through at least one communicating pipeline, one communicating pipeline corresponds to one-way valve, and meanwhile, the distance between each one-way valve and the pressure-resistant powder tank is smaller than the distance between the communicating pipeline and the pressure-resistant powder tank;
a third quick-opening air valve is arranged on each communication pipeline;
the other branch of the pressure dividing pipeline is a pressurizing pipeline, and the pressure dividing pipeline further comprises two connecting pipelines, namely a first connecting pipeline and a second connecting pipeline, wherein one end of each connecting pipeline is communicated with the pressurizing pipeline, and the other end of each connecting pipeline is communicated with the conveying pipeline;
the pressure reducing valve and the first quick-opening air valve are arranged on the pressure dividing pipeline, the second quick-opening air valve is arranged on the connecting pipeline, the quick-opening ball valve and the two one-way valves are sequentially arranged on the conveying pipeline, the first connecting pipeline is positioned between the two one-way valves, and the third quick-opening air valve is arranged on the first connecting pipeline and the second connecting pipeline;
the hopper is fixed at the top of the pressure-resistant powder tank through the rotary feeder;
the rotary feeder is a spiral feeder;
the inert gas source comprises at least one high-pressure nitrogen cylinder, wherein the at least one high-pressure nitrogen cylinder is formed by connecting the high-pressure nitrogen cylinders in series, each high-pressure nitrogen cylinder contains 50Lda nitrogen, and the pressure gas quantity is 15Mpa;
the second quick-opening air valve, the quick-opening ball valve and the third quick-opening air valve are controlled by a signal controller, and a main control chip of the signal controller adopts a floating point type central processing unit TMS320F28335;
the screw feeder is communicated with the signal controller, and a main control chip of the signal controller adopts a floating point type central processing unit TMS320F28335;
the method comprises the following steps:
the first step: the pressure-resistant powder tank is not pressurized, the dry powder extinguishing agent is contained in the hopper, the spiral feeder is started, and the pressure-resistant powder tank is charged with the dry powder extinguishing agent;
and a second step of: starting a pressure reducing valve, and reducing the pressure of the inert gas source to a matched pressure;
and a third step of: the first quick-opening air valve is kept normally open, and the pressure dividing pipeline and the pressure boosting pipeline are communicated;
fourth step: the signal controller controls the second quick-opening air valve to be opened, the pressure dividing pipeline is communicated with the connecting pipeline, and the dry powder extinguishing agent put into the pressure-resistant powder tank is mixed with inert gas conveyed by the inert gas source to form a gas-powder two-phase mixed flow state until the internal pressure of the pressure-resistant powder tank is stable;
fifth step: the signal controller controls the second quick-opening valve to be closed, meanwhile, the signal controller controls the quick-opening ball valve to be opened, the pressure-resistant powder tank is communicated with the conveying pipeline, the gas-powder two-phase mixed flow is discharged into the conveying pipeline, after the gas-powder two-phase mixed flow in the pressure-resistant powder tank is emptied, the quick-opening ball valve is closed, and under the action of the one-way valve, the gas-powder two-phase mixed flow is directly conveyed to the conveying terminal;
sixth step: the signal controller controls the third quick-opening air valve to be opened, the pressurizing pipeline and the communicating pipeline are communicated with the conveying pipeline, and the gas-powder two-phase mixed flow is further conveyed to the conveying terminal in the conveying pipeline under the pushing of the newly pressurized inert gas;
seventh step: after the quick-opening ball valve is closed, the signal controller controls the screw feeder to be opened for feeding, and simultaneously, the signal controller controls the second quick-opening air valve to be opened for mixing the dry powder extinguishing agent of the next round with the inert gas conveyed by the inert gas source.
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| CN114100043B (en) * | 2020-09-01 | 2023-02-17 | 中国石油化工股份有限公司 | Foam fire extinguishing system and foam fire extinguishing method |
| CN114652989A (en) * | 2020-12-22 | 2022-06-24 | 中国石油化工股份有限公司 | Storage tank fire extinguishing system for large area fires |
| CN113384840B (en) * | 2021-07-04 | 2022-04-26 | 兴化市方圆消防器材有限公司 | Can supplementary type remove dry powder extinguishing device |
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