CN111840881B - Preparation method of gel fire extinguishing agent - Google Patents
Preparation method of gel fire extinguishing agent Download PDFInfo
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- CN111840881B CN111840881B CN202010913957.0A CN202010913957A CN111840881B CN 111840881 B CN111840881 B CN 111840881B CN 202010913957 A CN202010913957 A CN 202010913957A CN 111840881 B CN111840881 B CN 111840881B
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0064—Gels; Film-forming compositions
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Abstract
The invention discloses a preparation method of a gel fire extinguishing agent, which is characterized in that water is taken from a main pipeline of fire fighting equipment under pressure, the taken water and gel powder are mixed for the first time outside the main pipeline to form a high-concentration gel liquid with fluidity, the mixed gel liquid is returned to the main pipeline and is mixed with water in the main pipeline for the second time to form the fire extinguishing agent, the output water quantity and the conveying pressure of the fire fighting equipment are not changed in the whole preparation process, and the fire extinguishing agent is continuously and synchronously prepared in the working time of the fire fighting equipment. The invention can change the pressure water output by the fire fighting equipment into gel for fire extinguishing on the premise of not changing any structure of the fire fighting equipment, hardly changes the output water quantity and the conveying pressure of the fire fighting equipment in the whole process, does not change any working condition of the fire fighting equipment, ensures that the gel powder and the water are secondarily mixed to finally reach the fire extinguishing use concentration, realizes continuous and synchronous glue making within the working time of the fire fighting equipment, and effectively solves the technical problem that the glue making can not be carried out under the condition of the pressure of the fire fighting water in the industry.
Description
Technical Field
The invention belongs to the technical field of fire fighting, and particularly relates to a preparation method of a gel fire extinguishing agent for extinguishing fire by using gel.
Background
The gel powder is mainly prepared from food-grade konjac flour, water-based diatom ooze, food-grade montmorillonite and the like through weighing and proportioning, and is in a fine granular shape under a normal state. The gel powder has extremely strong water absorption, can quickly form gel with very strong adhesiveness after being uniformly mixed with water according to a proportion, thereby being used as a gel fire extinguishing agent, the gel fire extinguishing agent can be sprayed and covered on the surface of an inflamer to form an isolating layer, namely, the cooling effect of the water is exerted, the gel fire extinguishing agent can also be covered on the surface of the inflamer for a long time to form the isolating layer to be isolated from oxygen, the gel fire extinguishing agent is particularly suitable for extinguishing A-type fires, particularly forest fires, the fire extinguishing effect is excellent, the gel can be sprayed on un-ignited trees to form a fire-proof isolating belt, and the gel can be naturally degraded after fire extinguishing, is nontoxic and harmless, and has no pollution to the environment. It can be seen that the use of gel as a fire extinguishing agent has higher economy and greater fire extinguishing ability than other water-based fire extinguishing agents.
Because of the extremely strong water absorption of the gel powder, the gel powder is stored in a closed container at ordinary times, and can be opened when in use, otherwise, the gel powder absorbs moisture in the air and turns into blocks, so that the physical state is greatly changed to influence the use function of the gel powder.
The gel has wide application range, can be used as a fire extinguishing agent of a main fighting fire truck, and can also be equipped with other mobile fire extinguishing equipment. In the prior art, gel is applied by premixing water and gel powder according to a fixed proportion to form gel, and then pressurizing and conveying the gel to a fire extinguishing gun or a fixed fire monitor through a fire pump to extinguish fire, namely, the gel can be prepared on the premise that fire-fighting water does not have pressure.
The main problems in the prior art are that once the premixed gel is used, the gel needs to be premixed again, the gel cannot be continuously prepared, the premixing process is complicated, the required time is long, and the time is life in the presence of an actual fire, so that the gel powder has many advantages, but the gel powder is not popularized and used in a large area in the market all the time, and the reason is that the gel powder is used.
Disclosure of Invention
The invention aims to: aiming at the existing problems, the preparation method of the gel fire extinguishing agent is capable of continuously and synchronously preparing the gel in the working time of the fire fighting equipment under the condition of the fire fighting water pressure.
The technical scheme of the invention is realized as follows: a preparation method of a gel fire extinguishing agent is characterized by comprising the following steps: the main pipeline of by fire-fighting equipment carries out the water intaking under the condition of area pressure, mixes the water of getting and gel powder once outside the main pipeline, forms the high concentration gel liquid that has mobility, and the gel liquid after will mixing is sent back to in the main pipeline again to mix with the water secondary in the main pipeline and form fire extinguishing agent, whole preparation process does not change fire-fighting equipment output water yield and delivery pressure, lasts in the fire-fighting equipment operating time and prepares fire extinguishing agent in step.
The preparation method of the gel fire extinguishing agent comprises the steps of collecting the flow of a main pipeline through a flowmeter, injecting the primarily mixed gel liquid into the main pipeline through a gel injection pump, controlling the addition amount of the gel powder before mixing with the water intake through a gel metering and adding device, and matching the amount of the released gel powder of the gel metering and adding device with the flow of the main pipeline during primary mixing, namely changing the addition amount of the gel powder along with the change of the flow of the main pipeline.
The preparation method of the gel fire extinguishing agent comprises the following specific steps of when high-concentration gel liquid with fluidity is prepared by one-time mixing:
according to known conditions:
collecting the flow Q of the main pipeline through a flowmeter;
rated flow rate of gel injection pump is Q1；
The water intake pipeline has the water intake flow ofQ2；
The concentration of gel required for fire extinguishing is N per thousand;
the gel concentration in the mixing hopper is as follows: (NQ/Q)1)‰；
The release amount of the gel metering and adding device is as follows: [ (NQ Q)2)/Q1]In units of g/s;
in the above parameters Q1、Q2And the fire extinguishing concentration is quantitative, only the flow Q of the main pipeline is variable, and the addition amount of the gel is changed according to the Q value, so that the control is realized only by controlling the release amount of the gel metering and adding device per second to be matched with the flow Q of the main pipeline.
The preparation method of the gel fire extinguishing agent comprises the steps that the water intake flow in the water intake pipeline is adjusted through the matching of the pressure reducing valve and the throttle orifice, the flow passing through the throttle orifice is a fixed value after the water pressure in the pipeline is constant through the pressure reducing valve, or the water intake flow in the water intake pipeline is adjusted through controlling the flow adjusting valve through the control system.
According to the preparation method of the gel fire extinguishing agent, gel powder is stored in a gel tank, an outlet at the bottom of the gel tank is connected with a mixing hopper through a gel metering and adding device, the gel powder is mixed in the mixing hopper at one time, a flow meter arranged on a main pipeline collects flow signals of the main pipeline and transmits the flow signals to a control system, and the control system controls a driving device of the gel metering and adding device according to the flow signals of the main pipeline so as to control the release amount of the gel powder in the gel tank.
The gel fire extinguishing agent preparation method comprises the steps of taking water into a main pressure pipeline through a water taking pipeline, arranging an electromagnetic valve on the water taking pipeline, arranging a one-way valve on a pipeline connecting a gel injection pump and the main pipeline, connecting the gel injection pump with a driving mechanism through an electromagnetic clutch, and after the fire extinguishing agent spraying at the outlet end of the main pipeline is stopped, controlling the electromagnetic valve to be turned off and controlling the electromagnetic clutch to enable the driving mechanism to stop driving the gel injection pump to stop pumping gel liquid, wherein the one-way valve is used for preventing high-pressure water in the main pipeline from flowing back into the gel injection pump.
According to the preparation method of the gel fire extinguishing agent, the fire extinguishing equipment is a main fighting fire truck, a driving mechanism of a pumping device is started, all electrical elements are electrified, the whole device is in a quasi-working state, pressure water output by the main fighting fire truck is connected to the device for preparing the fire extinguishing agent through a water taking pipeline on a main pipeline, and the driving mechanism controls the action of a gel injection pump through an electromagnetic clutch.
The invention mainly aims at the defect that continuous glue making can not be carried out in the prior art, pressure water output by the fire fighting equipment is changed into gel and then is used for extinguishing fire on the premise of not changing any structure of the fire fighting equipment, the water output quantity and the conveying pressure of the fire fighting equipment are hardly changed in the whole process, and any working condition of the fire fighting equipment is not changed, so that gel powder and water are secondarily mixed to finally reach the fire extinguishing use concentration, and then the gel powder and the water are conveyed to a fire extinguishing gun or a fixed fire monitor through a pipeline to extinguish the fire, thereby realizing continuous and synchronous glue making in the working time of the fire fighting equipment and effectively solving the technical problem that glue making can not be carried out under the condition of fire fighting water pressure in the industry.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Fig. 2 is another schematic structure of the present invention.
The labels in the figure are: the device comprises a water taking pipeline, a gel injection pump, a main pipeline, a mixing hopper, a gel tank, a gel metering and adding device, a flow guide blade, a flow meter, a liquid level control contact, an electromagnetic valve, an electromagnetic clutch, an electric stop valve, a check valve, a control system, a driving mechanism, a weighing device, a pressure reducing valve, a throttling orifice plate and a ball valve, wherein the water taking pipeline is 1, the gel injection pump is 2, the main pipeline is 3, the mixing hopper is 4, the gel tank is 5, the gel metering and adding device is 6, the flow guide blade is 7, the flow meter is 8, the liquid level meter is 9, the liquid level control contact is 10, the electromagnetic valve is 11, the electromagnetic clutch is 12, the electric stop valve is 13, the check valve is 14, the control system is 15, the driving mechanism is 16, the weighing device is 17, the pressure reducing valve is 18, the throttling orifice plate is 19, and the ball valve is 20.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that the indication of the orientation or the positional relationship is based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, or the orientation or the positional relationship which is usually understood by those skilled in the art, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, cannot be understood as limiting the present invention. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be further noted that the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases by those skilled in the art; the drawings in the embodiments are used for clearly and completely describing the technical scheme in the embodiments of the invention, and obviously, the described embodiments are a part of the embodiments of the invention, but not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
As shown in fig. 1, in order to realize the fire extinguishing agent preparation device corresponding to the gel fire extinguishing agent preparation method of the present invention, the fire extinguishing agent preparation device comprises a water intake pipe 1, a mixing mechanism and a gel injection pump 2, wherein a water inlet end of the water intake pipe 1 is connected with a main pipe 3 with pressure to form a water intake branch, a water outlet end of the water intake pipe 1 is connected with the mixing mechanism, and the water intake branch is used for mixing gel powder in the mixing mechanism with water to form a high concentration gel liquid with fluidity, the high concentration refers to a concentration higher than that of the gel liquid sprayed after secondary mixing and has a highest concentration value under the condition of fluidity, in the embodiment, the concentration of the gel liquid sprayed for fire extinguishing is 2-5% o, and the gel with a concentration exceeding 30% basically has no fluidity, so the concentration of the high concentration gel is 5-30% o, the water intake pipe 1 is provided with an electromagnetic valve 11, and the electromagnetic valve 11 is connected with a control system 15, compounding mechanism is connected with trunk line 3 through the pipeline that is provided with gel infusion pump 2 for in pouring into trunk line 3 with gel liquid into, and mix with the water secondary in trunk line 3 and form fire extinguishing agent, the trunk line is provided with two imports and two exports, but the exclusive use also can guarantee that two fire-fighting equipment use simultaneously.
In this embodiment, the mixing mechanism includes a mixing hopper 4 and a gel tank 5, the gel tank 5 is arranged above the mixing hopper 4, a discharge port of the gel tank 5 is connected with the mixing hopper 4 through a gel metering adding device 6, a water outlet end of the water taking pipeline 1 is connected with the upper part of the mixing hopper 4, a pressure reducing valve 18 is arranged on a pipeline where the electromagnetic valve 11 is connected with the mixing hopper 4, a throttling orifice plate 19 is arranged in a pipeline behind the pressure reducing valve 18, an outlet at the bottom of the mixing hopper 4 is connected with the main pipeline 3 through a pipeline provided with a gel injection pump 2, a flowmeter 8 is arranged on the main pipeline 3 and upstream of a water inlet of the water taking pipeline 1, the flowmeter 8 and the gel metering adding device 6 are respectively connected with a control system 15, the flowmeter 8 is used for collecting water flow in the main pipeline 3 and controlling a driving device of the gel metering adding device 6 through the control system 15, to control the amount of release of the gel powder in the gel tank 5.
Based on the fire extinguishing agent preparation device, the gel fire extinguishing agent preparation method provided by the invention specifically comprises the following steps: the main pipeline of by fire-fighting equipment carries out the water intaking under the condition of area pressure, mixes the water of getting and gel powder once outside the main pipeline, forms the high concentration gel liquid that has mobility, and the gel liquid after will mixing is sent back to in the main pipeline again to mix with the water secondary in the main pipeline and form fire extinguishing agent, whole preparation process does not change fire-fighting equipment output water yield and delivery pressure, lasts in the fire-fighting equipment operating time and prepares fire extinguishing agent in step.
Specifically, the gel powder is stored in the gel tank, the outlet at the bottom of the gel tank is connected with the mixing hopper through the gel metering and adding device, the gel powder is mixed in the mixing hopper at one time, a flow meter arranged on the main pipeline collects flow signals of the main pipeline and transmits the flow signals to the control system, and the control system controls the driving device of the gel metering and adding device according to the flow signals of the main pipeline so as to control the release amount of the gel powder in the gel tank. Gather the flow of trunk line through the flowmeter, pour into the trunk line into through the gel infusion pump with the gel liquid of once mixing in, the addition of gel powder before mixing with the water intaking is controlled by gel measurement interpolation device, and when once mixing, the gel measurement interpolation device's the volume of releasing gel powder and trunk line flow phase-match, the addition of gel powder changes along with the change of trunk line flow promptly.
In the mixing hopper, because of the extremely strong water absorption capacity of the gel powder, the concentration of the gel needs to be accurately proportioned, and if the concentration of the gel reaches 30 per mill, the formed gel basically has no fluidity. It is obvious that the technical difficulty here is that the water intake flow rate and the rated flow rate of the gel injection pump must be matched to ensure that the high-concentration gel liquid is injected into the main fire fighting pipeline within the gel forming time, otherwise, once the high-concentration gel liquid forms gel, the high-concentration gel liquid does not have fluidity, and any pumping device on the market at present cannot inject the high-concentration gel or gel powder which does not have fluidity into the pressure pipeline.
In order to solve the technical problems, the invention specifically prepares the high-concentration gel liquid with fluidity by mixing the components once, and the preparation method comprises the following steps:
according to known conditions:
collecting the flow Q of the main pipeline through a flowmeter;
rated flow rate of gel injection pump is Q1；
The water intake flow of the water intake pipeline is Q2；
The concentration of gel required for fire extinguishing is N per thousand;
the gel concentration in the mixing hopper is as follows: (NQ/Q)1)‰；
The release amount of the gel metering and adding device is as follows: [ (NQ Q)2)/Q1]In units of g/s;
in the above parameters Q1、Q2And the fire extinguishing concentration is quantitative, only the flow Q of the main pipeline is variable, and the addition amount of the gel is changed according to the Q value, so that the control is realized only by controlling the release amount of the gel metering and adding device per second to be matched with the flow Q of the main pipeline.
Wherein the rated flow rate Q of the gel injection pump1Is a fixed quantity determined by the self equipment parameters of the gel injection pump and the water intake flow Q of the water intake pipeline2When the pressure is constant to a certain value by the pressure reducing valve, the flow passing through the orifice plate is determined to be a constant value so as to ensure that the water intake quantity is unchanged.
In addition, flow control valves can be used for controlling the flow on the water intake pipeline to adjust the flow, control logics need to be added when the flow control valves are used, control is delayed to a certain degree, and cost is higher than that of the throttling orifice plate. And flow is adjusted through the cooperation of orifice plate and relief pressure valve, its structure is simpler, and the operation is more reliable and more economical.
In order to further guarantee the normal use of fire-fighting water, be provided with ball valve 20 on the water intaking pipeline between solenoid valve and trunk line, ball valve 20 can guarantee when the device breaks down, still can ensure that the fire-fighting water is not influenced.
In order to further improve the monitoring and control of the device, a weighing device 17 is arranged below the mixing hopper 4, the weighing device 17 is connected with a control system 15, the height liquid level in the barrel is controlled through the weight change of the mixing hopper, automatic balance is realized, when the weight of the mixing hopper reaches a set upper limit value, the liquid phase in the mixing hopper reaches the set upper limit value, and the control system can control the water taking amount; the gel injection pump 2 is connected with a driving mechanism 16 through an electromagnetic clutch 12, the driving mechanism 16 and the electromagnetic clutch 12 are respectively connected with a control system 15, wherein the driving mechanism 16 can adopt a gasoline engine, a diesel engine, a motor and the like.
Wherein be provided with electric stop valve 13 on the pipeline that gel infusion pump 2 and trunk line 3 are connected, electric stop valve 13 is connected with control system 15, electric stop valve possesses the effect of washing and pressure release be provided with check valve 14 on the pipeline that gel infusion pump 2 and trunk line 3 are connected to in avoiding the water in the trunk line to get into the mixing hopper.
As shown in fig. 2, as another monitoring and controlling method for the device, a liquid level meter 9 may be disposed in the mixing hopper 4, a liquid level control contact 10 of the liquid level meter 9 is connected to a control system 15, and when the liquid level meter contacts with the liquid level control contact, a liquid phase in the mixing hopper reaches a set upper limit, and the control system controls the water intake amount.
As another structure design, a flow guide device 7 corresponding to the water outlet of the water taking pipeline 1 is arranged in the mixing hopper 4, and water taking can be guided through the flow guide device to be fully mixed with gel powder in the mixing hopper.
Carry out the water intaking to taking in the area trunk line through the water intaking pipeline, be provided with the solenoid valve on the water intaking pipeline, be provided with the check valve on the pipeline that gel infusion pump and trunk line are connected, the gel infusion pump is connected with actuating mechanism through electromagnetic clutch, stops the fire extinguishing agent spraying back when the exit end of trunk line, and control system control solenoid valve cuts off to control electromagnetic clutch makes actuating mechanism stop the drive to the gel infusion pump and stops the pumping of gel liquid, the check valve is used for preventing the interior high pressure water reflux of trunk line to gel infusion pump in.
In this embodiment, the fire extinguishing apparatus is a main fighting fire truck, the driving mechanism of the pumping device is turned on, all electrical components are powered on, the whole device is in a quasi-working state, pressure water output by the main fighting fire truck is connected to the device for preparing the fire extinguishing agent through a water intake pipeline on a main pipeline, and the driving mechanism controls the action of the gel injection pump through an electromagnetic clutch.
The working principle of the invention is as follows:
the invention takes a main fighting fire truck as an example, a driving mechanism of a pumping device is started, all electrical elements are electrified, the whole device is in a quasi-working state, pressure water output by the main fighting fire truck is connected to an inlet of a fire extinguishing agent preparation device through a pipeline, when the pressure water passes through a main pipeline, the device intercepts a small part of fire fighting water from the main pipeline with pressure through a water taking pipeline and enters a mixing hopper, a flowmeter acquires signals to control a driving device of a gel metering and adding device, gel is added according to a fixed proportion of the total water flow Q, gel powder and a small amount of intercepted water are mixed in the mixing hopper to form high-concentration gel liquid, a gel injection pump is started while the gel metering and adding device works, and before the gel liquid has fluidity, the high-concentration gel liquid is injected into the main pipeline through the gel injection pump and is mixed with fire fighting water in the main pipeline again, thereby forming gel with concentration ratio required for extinguishing fire.
According to the method, the flow signal acquired from the main pipeline is used for controlling the gel powder metering and adding device to realize accurate proportioning, the water intake amount is only a small part of the water output amount of the main firefighting truck, the conveying pressure of the main pipeline is not lost basically during water intake, and the water intake amount is injected into the main pipeline again through the gel injection pump, so that the pressure and the flow of the main pipeline are not changed in the whole preparation process.
The invention adopts the technical scheme that the main pipeline bypass is firstly premixed with the high-concentration gel liquid with fluidity, then the high-concentration gel liquid is pumped back into the main pipeline and is secondarily mixed with the pressurized fire-fighting water in the main pipeline to form the gel fire-fighting agent with the concentration required by spraying.
The glue prepared by other methods has certain disadvantages: if the solid gel powder is directly injected into a fire fighting pipeline with pressure through a pumping device, the physical properties of the solid gel powder after being pressed are greatly changed and the solid gel powder cannot be uniformly mixed with water; if high-pressure gas is used as a medium to convey the solid gel powder to a pressure water pipeline, the gas used as the medium is difficult to remove, so that a pipe network vibrates, the spraying distance is shortened, and the fire extinguishing efficiency is seriously influenced; if utilize the venturi principle to adopt the negative pressure to inhale the solid gel powder in the pipeline, can lead to loss of pressure too big, and can't solve the problem that the powder export was blocked up in the time of closing the rifle to the water backward flow.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A preparation method of a gel fire extinguishing agent is characterized by comprising the following steps: taking water from a main pipeline of the fire fighting equipment under the condition of pressure, mixing the taken water and gel powder outside the main pipeline for the first time to form high-concentration gel liquid with fluidity, sending the mixed gel liquid back to the main pipeline, and mixing the gel liquid and the water in the main pipeline for the second time to form a fire extinguishing agent, wherein the output water quantity and the conveying pressure of the fire fighting equipment are not changed in the whole preparation process, and the fire extinguishing agent is continuously and synchronously prepared in the working time of the fire fighting equipment;
the flow of a main pipeline is collected through a flowmeter, the gel liquid which is mixed for the first time is injected into the main pipeline through a gel injection pump, the addition amount of the gel powder before mixing with the water is controlled by a gel metering and adding device, and the amount of the released gel powder of the gel metering and adding device is matched with the flow of the main pipeline during the first mixing, namely the addition amount of the gel powder is changed along with the change of the flow of the main pipeline; the gel powder is stored in the gel tank, an outlet at the bottom of the gel tank is connected with the mixing hopper through the gel metering and adding device, the gel powder is mixed in the mixing hopper at one time, a flow meter arranged on the main pipeline collects flow signals of the main pipeline and transmits the flow signals to the control system, and the control system controls a driving device of the gel metering and adding device according to the flow signals of the main pipeline so as to control the release amount of the gel powder in the gel tank;
when the high-concentration gel liquid with fluidity is prepared by one-time mixing, the specific preparation method comprises the following steps:
according to known conditions:
collecting the flow Q of the main pipeline through a flowmeter;
rated flow rate of gel injection pump is Q1；
The water intake flow of the water intake pipeline is Q2；
The concentration of gel required for fire extinguishing is N per thousand;
the gel concentration in the mixing hopper is as follows: (NQ/Q)1)‰；
The release amount of the gel metering and adding device is as follows: [ (NQ Q)2)/Q1]In units of g/s;
in the above parameters Q1、Q2And the fire extinguishing concentration is quantitative, only the flow Q of the main pipeline is variable, and the addition amount of the gel is changed according to the Q value, so that the control is realized only by controlling the release amount of the gel metering and adding device per second to be matched with the flow Q of the main pipeline.
2. The method for preparing a gel fire extinguishing agent according to claim 1, wherein: the water intake flow in the water intake pipeline is adjusted by the matching of the pressure reducing valve and the throttle orifice, after the water pressure in the pipeline is constant by the pressure reducing valve, the flow passing through the throttle orifice is a fixed value, or the water intake flow in the water intake pipeline is adjusted by controlling the flow adjusting valve by the control system.
3. The method for preparing a gel fire extinguishing agent according to claim 1, wherein: carry out the water intaking to taking in the area trunk line through the water intaking pipeline, be provided with the solenoid valve on the water intaking pipeline, be provided with the check valve on the pipeline that gel infusion pump and trunk line are connected, the gel infusion pump is connected with actuating mechanism through electromagnetic clutch, stops the fire extinguishing agent spraying back when the exit end of trunk line, and control system control solenoid valve cuts off to control electromagnetic clutch makes actuating mechanism stop the drive to the gel infusion pump and stops the pumping of gel liquid, the check valve is used for preventing the interior high pressure water reflux of trunk line to gel infusion pump in.
4. The method for preparing a gel fire extinguishing agent according to claim 3, wherein: the fire extinguishing apparatus is a main fighting fire truck, a driving mechanism of the pumping device is started, all electrical elements are electrified, the whole device is in a quasi-working state, pressure water output by the main fighting fire truck is connected to a device for preparing a fire extinguishing agent through a water taking pipeline on a main pipeline, and the driving mechanism controls the action of a gel injection pump through an electromagnetic clutch.
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| CN103182132B (en) * | 2011-12-30 | 2015-09-30 | 北京谊安医疗系统股份有限公司 | There is the temperature-sensing valve of flow-compensated function and comprise its anesthesia evaporator |
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| CN107823821B (en) * | 2017-12-07 | 2023-01-13 | 国网湖南省电力有限公司 | Water mist fire extinguishing system capable of accurately mixing fire extinguishing liquid in real time and application method thereof |
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| CN110354422B (en) * | 2019-07-08 | 2021-02-09 | 中国石油化工股份有限公司 | Negative pressure mobile three-phase foam generating device and method |
| CN110384883A (en) * | 2019-07-08 | 2019-10-29 | 中国石油化工股份有限公司 | A kind of positive pressure movable type three-phase froth generating device and method |
| CN110339508A (en) * | 2019-07-08 | 2019-10-18 | 中国石油化工股份有限公司 | A kind of Petrochemical three-phase froth generation and injection apparatus |
| CN210845063U (en) * | 2019-08-23 | 2020-06-26 | 威特龙消防安全集团股份公司 | Actuating mechanism for adding water-based polymer fire extinguishing additive |
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