A kind of gel fire extinguishing agent preparation device

Abstract

The present invention discloses a gel fire extinguishing agent preparation device, including a water intake pipeline, a mixing mechanism and a gel injection pump, wherein the water inlet end of the water intake pipeline is connected to a pressurized main pipeline to form a water intake branch, the water outlet end of the water intake pipeline is connected to the mixing mechanism, and the mixing mechanism is connected to the main pipeline through a pipeline provided with a gel injection pump. The present invention mainly aims at the drawback that the prior art cannot continuously make gel. Without changing any structure of the fire-fighting equipment, the pressure water output by the fire-fighting equipment is converted into gel and then used for fire-fighting. The whole process hardly changes the output water volume and delivery pressure of the fire-fighting equipment, nor does it change any working conditions of the fire-fighting equipment. The gel powder and water are mixed twice to finally reach the concentration used for fire extinguishing, and then transported to the fire-fighting gun or fixed fire-fighting cannon through a pipeline for fire-fighting, realizing continuous and synchronous gel making during the working time of the fire-fighting equipment, and effectively solving the technical problem that the industry cannot make gel when the fire-fighting water is under pressure.

Description

Technical Field

[0001] The invention belongs to the technical field of fire fighting and extinguishing, and in particular relates to a device for preparing a gel fire extinguishing agent for extinguishing fire by using gel. Background Art

[0002] The gel powder main component is that the raw materials such as food-grade konjac flour, water-based diatom mud, food-grade montmorillonite are formed through weighing proportioning, and gel powder is fine granular under normal conditions. The water absorption of gel powder is particularly strong. After uniformly mixing with water in proportion, it can rapidly form a gel with very strong adhesiveness, thereby as a gel fire extinguishing agent, it is covered on the burning object surface after spraying to form an isolation layer, namely, it has played the cooling effect of water, and can be covered on the burning object surface for a long time to form an isolation layer and be isolated from oxygen, and is particularly suitable for extinguishing Class A fires, especially for forest fires, not only fire extinguishing effect is splendid, gel can also be sprayed on trees that are not on fire, forming a fireproof isolation belt, and gel can be naturally degraded after extinguishing the fire, non-toxic and harmless, without any pollution to the environment. As can be seen, adopting gel as fire extinguishing agent, it has higher economy and stronger fire extinguishing ability compared with other water-based fire extinguishing agents.

[0003] Due to its strong water absorption, gel powder should be stored in a sealed container and opened only when in use. Otherwise, the gel powder will absorb moisture in the air and become lumpy, causing a significant change in its physical state and affecting its function.

[0004] Gel has a wide range of applications, including as an extinguishing agent for main fire trucks and other mobile firefighting equipment. Existing technologies primarily premix water and gel powder in a fixed ratio to form a gel, which is then pumped under pressure by a fire pump to fire extinguishers or fixed fire monitors for firefighting. This requires no pressure on the firefighting water supply to produce the gel.

[0005] The main problem with the existing technology is that once the premixed gel is used up, it needs to be premixed again, and the gel cannot be continuously produced. In addition, the premixing process is cumbersome and time-consuming. In the face of an actual fire, time is life. Therefore, although gel powder has many advantages, it has not been widely promoted and used in the market. This is the reason. Summary of the Invention

[0006] The purpose of the present invention is to address the above-mentioned problems and provide a device for preparing a gel fire extinguishing agent that can continuously and synchronously produce gel during the working hours of fire fighting equipment when fire fighting water is under pressure.

[0007] The technical solution of the present invention is implemented as follows: a gel fire extinguishing agent preparation device, characterized in that it includes a water intake pipe, a mixing mechanism and a gel injection pump, the water inlet end of the water intake pipe is connected to the pressurized main pipe to form a water intake branch, the water outlet end of the water intake pipe is connected to the mixing mechanism, which is used to mix the gel powder in the mixing mechanism with water to form a high-concentration gel liquid with fluidity, and the mixing mechanism is connected to the main pipe through a pipe equipped with a gel injection pump, which is used to inject the gel liquid into the main pipe and mix it with the water in the main pipe for a second time to form a fire extinguishing agent.

[0008] The gel fire extinguishing agent preparation device of the present invention has a mixing mechanism comprising a mixing hopper and a gel tank. The gel tank is arranged above the mixing hopper, and the discharge port of the gel tank is connected to the mixing hopper via a gel metering and adding device. The water outlet end of the water intake pipe is connected to the upper part of the mixing hopper, and the bottom outlet of the mixing hopper is connected to the main pipeline via a pipeline provided with a gel injection pump.

[0009] The gel fire extinguishing agent preparation device of the present invention is provided with a flow meter on the main pipeline, upstream of the water inlet of the water intake pipeline. The flow meter and the gel metering and addition device are respectively connected to a control system. The flow meter is used to collect the water flow in the main pipeline and control the driving device of the gel metering and addition device through the control system to control the release amount of gel powder in the gel tank.

[0010] The gel fire extinguishing agent preparation device of the present invention has a weighing device provided below the mixing hopper, the weighing device is connected to a control system, or a liquid level gauge is provided in the mixing hopper, the liquid level control contact of the liquid level gauge is connected to the control system.

[0011] The gel fire extinguishing agent preparation device of the present invention is provided with a solenoid valve on the water intake pipe, the solenoid valve is connected to a control system, a pressure reducing valve is provided on the pipe connecting the solenoid valve and the mixing hopper, a throttling orifice is provided in the pipe after the pressure reducing valve, or a flow regulating valve is provided on the pipe connecting the solenoid valve and the mixing hopper, the flow regulating valve is connected to the control system.

[0012] In the gel fire extinguishing agent preparation device of the present invention, the gel injection pump is connected to the driving mechanism via an electromagnetic clutch, and the driving mechanism and the electromagnetic clutch are respectively connected to a control system.

[0013] The gel fire extinguishing agent preparation device of the present invention is provided with an electric stop valve on the pipeline connecting the gel injection pump and the main pipeline, and the electric stop valve is connected to the control system.

[0014] The gel fire extinguishing agent preparation device of the present invention is provided with a one-way valve on the pipeline connecting the gel injection pump and the main pipeline.

[0015] The gel fire extinguishing agent preparation device of the present invention has a main pipeline provided with a plurality of inlets and a corresponding plurality of outlets.

[0016] The gel fire extinguishing agent preparation device of the present invention is provided with a ball valve on the water intake pipe between the solenoid valve and the main pipe.

[0017] The present invention mainly addresses the drawback that the existing technology cannot continuously produce glue. Without changing any structure of the fire-fighting equipment, an independent glue-making device is used to convert the pressurized water output by the fire-fighting equipment into gel before using it for fire extinguishing. The entire process hardly changes the water output and delivery pressure of the fire-fighting equipment, nor does it change any working conditions of the fire-fighting equipment. The gel powder and water are mixed twice to finally reach the concentration used for fire extinguishing, and then transported to the fire extinguishing gun or fixed fire monitor through a pipeline for fire extinguishing, realizing continuous and synchronous glue production during the working hours of the fire-fighting equipment, and effectively solving the technical problem in the industry that glue cannot be produced when the fire-fighting water is under pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is another structural schematic diagram of the present invention.

[0020] Markings in the figure: 1 is the water intake pipe, 2 is the gel injection pump, 3 is the main pipe, 4 is the mixing hopper, 5 is the gel tank, 6 is the gel metering and adding device, 7 is the guide vane, 8 is the flow meter, 9 is the liquid level meter, 10 is the liquid level control contact, 11 is the solenoid valve, 12 is the electromagnetic clutch, 13 is the electric stop valve, 14 is the one-way valve, 15 is the control system, 16 is the driving mechanism, 17 is the weighing device, 18 is the pressure reducing valve, 19 is the throttling orifice plate, and 20 is the ball valve. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0025] In the description of the embodiments of the present invention, it should be noted that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use, or the orientations or positional relationships commonly understood by those skilled in the art, or the orientations or positional relationships in which the inventive product is typically placed when in use. These are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used only to distinguish descriptions and should not be understood as indicating or implying relative importance.

[0026] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances; the drawings in the embodiments are used to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] like Figure 1As shown, a gel fire extinguishing agent preparation device includes a water intake pipe 1, a mixing mechanism, and a gel injection pump 2. The water inlet end of the water intake pipe 1 is connected to a pressurized main pipe 3 to form a water intake branch. The water outlet end of the water intake pipe 1 is connected to the mixing mechanism, which is used to mix the gel powder in the mixing mechanism with water to form a high-concentration gel liquid with fluidity. The so-called high concentration refers to a concentration higher than the gel liquid for spraying after secondary mixing and the highest concentration value under fluidity. In this embodiment, the concentration of the gel liquid sprayed for fire extinguishing is 2-5‰. When the concentration exceeds 30‰, the gel has essentially no fluidity. Therefore, the concentration of the high-concentration gel is 5‰-30‰. A solenoid valve 11 is provided on the water intake pipe 1, and the solenoid valve 11 is connected to a control system 15. The mixing mechanism is connected to the main pipe 3 via a pipe provided with the gel injection pump 2, and is used to inject the gel liquid into the main pipe 3. After secondary mixing with the water in the main pipe 3, it forms a fire extinguishing agent. The main pipe is provided with two inlets and two outlets, which can be used alone or to ensure the simultaneous use of two fire fighting equipment.

[0028] 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. The discharge port of the gel tank 5 is connected to the mixing hopper 4 through a gel metering and adding device 6. The outlet end of the water intake pipe 1 is connected to the upper part of the mixing hopper 4. A pressure reducing valve 18 is provided on the pipe connecting the solenoid valve 11 and the mixing hopper 4. A throttling orifice plate 19 is provided in the pipe after the pressure reducing valve 18. The bottom outlet of the mixing hopper 4 is connected to the main pipe 3 through a pipe provided with a gel injection pump 2. A flow meter 8 is provided on the main pipe 3, upstream of the water inlet of the water intake pipe 1. The flow meter 8 and the gel metering and adding device 6 are respectively connected to the control system 15. The flow meter 8 is used to collect the water flow in the main pipe 3 and control the driving device of the gel metering and adding device 6 through the control system 15 to control the release amount of gel powder in the gel tank 5.

[0029] In the mixing hopper, the gel powder's strong water absorption capacity requires precise gel concentration. If the gel concentration exceeds 30‰, the resulting gel will have virtually no fluidity. The technical difficulty lies in the matching of the water intake flow rate and the rated flow rate of the gel injection pump to ensure that the highly concentrated gel solution is injected into the fire main pipeline within the gelling time. Otherwise, once the highly concentrated gel solution forms a gel, it will lose fluidity. Currently, no pumping device on the market is capable of injecting highly concentrated, non-fluid gel or gel powder into a pressure pipeline.

[0030] In response to the above technical problems, the method of the present invention for achieving precise gel concentration ratio is:

[0031] Known conditions: The flow rate Q of the main pipeline is collected through a flow meter;

[0032] The rated flow rate of the gel injection pump is Q1;

[0033] The water intake flow rate of the water intake pipeline is Q2;

[0034] The gel concentration required for fire extinguishing is N‰;

[0035] The gel concentration in the mixing hopper is: (NQ / Q1)‰;

[0036] The release rate of the gel metering device is: [(NQ*Q2) / Q1], in g / s;

[0037] Among the above parameters, Q1, Q2 and fire extinguishing concentration are all quantitative, and only the main pipeline flow rate Q is a variable. The amount of gel added changes with the change of Q. Therefore, in terms of control, it is only necessary to control the release rate of the gel metering device per second to match the main pipeline flow rate Q.

[0038] Among them, the rated flow rate Q1 of the gel injection pump is a quantity determined by the equipment parameters of the gel injection pump itself, and the water intake flow rate Q2 of the water intake pipeline is determined to be a constant value when the pressure reducing valve keeps the pressure constant at a certain value, and the flow rate passing through the throttling orifice plate is determined to be a constant value to ensure that the water intake volume remains unchanged.

[0039] Flow control valves can also be used to regulate flow in water intake pipes. However, using a flow control valve requires additional control logic, introduces a certain control delay, and is more expensive than using a throttling orifice. However, using a throttling orifice in conjunction with a pressure reducing valve to regulate flow offers a simpler structure, more reliable operation, and greater economics.

[0040] In order to further ensure the normal use of fire-fighting water, a ball valve 20 is provided on the water intake pipe between the solenoid valve and the main pipe. The ball valve 20 can ensure that the fire-fighting water is not affected when the device fails.

[0041] In order to further improve the monitoring and control of the device, a weighing device 17 is provided below the mixing hopper 4. The weighing device 17 is connected to the control system 15. The high and low liquid levels in the barrel are controlled by the weight change of the mixing hopper to achieve automatic balance. When the weight of the mixing hopper reaches the set upper limit value, the liquid phase in the mixing hopper reaches the set upper limit, and the control system will control the water intake; the gel injection pump 2 is connected to the drive mechanism 16 through the electromagnetic clutch 12, and the drive mechanism 16 and the electromagnetic clutch 12 are respectively connected to the control system 15, wherein the drive mechanism 16 can adopt a gasoline engine, a diesel engine, an electric motor, etc.

[0042] Among them, an electric stop valve 13 is provided on the pipe connecting the gel injection pump 2 and the main pipe 3. The electric stop valve 13 is connected to the control system 15. The electric stop valve has the functions of cleaning and pressure relief; a one-way valve 14 is provided on the pipe connecting the gel injection pump 2 and the main pipe 3 to prevent water in the main pipe from entering the mixing hopper.

[0043] like Figure 2 As shown, as another way to monitor and control the device, a liquid level meter 9 can also be provided in the mixing hopper 4. The liquid level control contact 10 of the liquid level meter 9 is connected to the control system 15. When the liquid level meter contacts the liquid level control contact, the liquid phase in the mixing hopper reaches the set upper limit, and the control system will control the water intake.

[0044] As another structural design, a diversion device 7 corresponding to the water outlet of the water intake pipe 1 is provided in the mixing hopper 4. The diversion device can divert the intake water so that it is fully mixed with the gel powder in the mixing hopper.

[0045] The working principle of the present invention is:

[0046] Taking a main battle fire truck as an example, the present invention uses a driving mechanism of a pumping device as an example. All electrical components are energized, and the entire device is in a quasi-working state. The pressurized water output by the main battle fire truck is connected to the inlet of a gel fire extinguishing agent preparation device through a pipe. After the pressurized water passes through the main pipeline, the device intercepts a small amount of fire-fighting water from the pressurized main pipeline through a water intake pipe and enters a mixing hopper. The flow meter collects signals to control the driving device of the gel metering and adding device, allowing it to add gel in a fixed proportion according to the total water flow Q. The gel powder is mixed with the intercepted small amount of water in the mixing hopper to form a high-concentration gel liquid. The gel metering and adding device is started while the gel injection pump is turned on. Before the gel liquid has fluidity, the high-concentration gel liquid is injected into the main pipeline through the gel injection pump and mixed again with the fire-fighting water in the main pipeline to form a gel with the concentration ratio required for fire extinguishing. This device uses the flow signal collected on the main pipeline to control the gel powder metering and adding device to achieve precise mixing ratio. The amount of water taken is only a small part of the water output of the main battle fire truck, and the main pipeline's delivery pressure is basically not lost when taking water. The taken water is injected into the main pipeline again through the gel injection pump, so the entire preparation process does not change the pressure and flow of the main pipeline.

[0047] The present invention uses a main pipeline bypass to premix a fluid, high-concentration gel liquid, then pumps the high-concentration gel liquid back into the main pipeline for secondary mixing with pressurized fire water in the main pipeline to form a gel fire extinguishing agent with the concentration required for spraying. The preparation method of the gel fire extinguishing agent is a technical solution that has been experimentally verified and can effectively solve current technical problems.

[0048] However, there are certain disadvantages in using other methods to make gel: if the solid gel powder is directly injected into the pressurized fire-fighting pipe through a pumping device, the physical properties of the solid gel powder will change greatly after being pressurized and it will be impossible to mix evenly with water; if high-pressure gas is used as the medium to transport the solid gel powder to the pressure water pipe, it will make the gas as the medium difficult to remove, causing the pipe network to vibrate and shortening the spraying distance, seriously affecting the fire extinguishing efficiency; if the Venturi principle is used to use negative pressure to suck the solid gel powder into the pipe, it will cause excessive pressure loss and cannot solve the problem of water backflow blocking the powder outlet when the gun is turned off.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gel fire extinguishing agent preparation device, characterized in that: The invention comprises a water intake pipeline (1), a mixing mechanism and a gel injection pump (2); the water inlet end of the water intake pipeline (1) is connected to a pressurized main pipeline (3) to form a water intake branch; the water outlet end of the water intake pipeline (1) is connected to the mixing mechanism, and is used to mix gel powder in the mixing mechanism with water outside the main pipeline (3) to form a high-concentration gel liquid with fluidity; the mixing mechanism is connected to the main pipeline (3) through a pipeline provided with the gel injection pump (2), and is used to inject the gel liquid into the main pipeline (3), and mix it with the water in the main pipeline (3) for secondary formation of a fire extinguishing agent; the entire preparation process does not change the output water volume and delivery pressure of the fire-fighting equipment, and the fire-fighting equipment continuously and synchronously prepares the fire-fighting agent during working hours; The mixing mechanism comprises a mixing hopper (4) and a gel tank (5), wherein the gel tank (5) is arranged above the mixing hopper (4), the discharge port of the gel tank (5) is connected to the mixing hopper (4) via a gel metering and adding device (6), the water outlet end of the water intake pipeline (1) is connected to the upper part of the mixing hopper (4), and the bottom outlet of the mixing hopper (4) is connected to the main pipeline (3) via a pipeline provided with a gel injection pump (2); a flow meter (8) is arranged on the main pipeline (3) upstream of the water inlet of the water intake pipeline (1), the flow meter (8) and the gel metering and adding device (6) are respectively connected to a control system, the flow meter (8) is used to collect the water flow in the main pipeline (3), and control the driving device of the gel metering and adding device (6) through the control system to control the release amount of gel powder in the gel tank (5); The precise concentration ratio of gel is achieved by collecting the flow rate Q of the main pipeline through a flow meter; The rated flow rate of the gel injection pump is Q1; The water intake flow rate of the water intake pipeline is Q2; The gel concentration required for fire extinguishing is N‰; The gel concentration in the mixing hopper is: (NQ / Q1)‰; The release amount of the gel metering device is: [(NQ*Q2) / Q1], in g / s; Among the above parameters, Q1, Q2 and fire extinguishing concentration are all quantitative, and only the main pipeline flow Q is a variable. The amount of gel added changes with the change of Q. Therefore, in terms of control, it is only necessary to control the release amount per second of the gel metering device to match the main pipeline flow Q.

2. The gel fire extinguishing agent preparation device according to claim 1, characterized in that: A weighing device (17) is arranged below the mixing hopper (4), and the weighing device (17) is connected to a control system (15); or a liquid level meter (9) is arranged inside the mixing hopper (4), and a liquid level control contact (10) of the liquid level meter (9) is connected to a control system (15).

3. The gel fire extinguishing agent preparation device according to claim 1, characterized in that: A solenoid valve (11) is provided on the water intake pipeline (1), and the solenoid valve (11) is connected to a control system (15). A pressure reducing valve (18) is provided on the pipeline connecting the solenoid valve (11) and the mixing hopper (4), and a throttling orifice plate (19) is provided in the pipeline behind the pressure reducing valve (18), or a flow regulating valve is provided on the pipeline connecting the solenoid valve (11) and the mixing hopper (4), and the flow regulating valve is connected to the control system (15).

4. The gel fire extinguishing agent preparation device according to claim 1, characterized in that: The gel injection pump (2) is connected to a driving mechanism (16) via an electromagnetic clutch (12), and the driving mechanism (16) and the electromagnetic clutch (12) are respectively connected to a control system (15).

5. The gel fire extinguishing agent preparation device according to claim 1, characterized in that: An electric stop valve (13) is provided on the pipeline connecting the gel injection pump (2) and the main pipeline (3), and the electric stop valve (13) is connected to a control system (15).

6. The gel fire extinguishing agent preparation device according to claim 1, characterized in that: A one-way valve (14) is provided on the pipeline connecting the gel injection pump (2) and the main pipeline (3).

7. The gel fire extinguishing agent preparation device according to claim 1, characterized in that: The main pipeline (3) is provided with a plurality of inlets and a corresponding plurality of outlets.

8. The gel fire extinguishing agent preparation device according to claim 3, characterized in that: A ball valve (20) is provided on the water intake pipeline (1) between the solenoid valve (11) and the main pipeline (3).

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