A device for testing the water film performance of a foam extinguishing agent

Abstract

The utility model relates to foaming extinguishing agent performance test technical field, specifically disclose a kind of foaming extinguishing agent water film performance testing device, comprising: display, high-definition video microscope, high-speed camera, syringe mechanism, oil pan and timing igniter, the display is respectively connected with high-definition video microscope, high-speed camera, the oil pan is used to hold fuel, the high-definition video microscope is placed in oil pan side, its lens is flush with fuel surface in oil pan, the high-speed camera is placed perpendicularly to fuel surface, syringe mechanism and timing igniter are placed in oil pan side, the syringe mechanism is used to inject foaming extinguishing agent in oil pan, the timing igniter is used to ignite fuel. The utility model can measure water film thickness, water film diffusion speed and the closed inhibition time of water film, realize the role of quantitative comprehensive evaluation water film performance, provide data support for more perfect evaluation foaming extinguishing agent performance.

Description

Technical Field

[0001] This utility model relates to the field of foam fire extinguishing agent performance testing technology, and in particular to a foam fire extinguishing agent water film performance testing device. Background Technology

[0002] Film-forming foam extinguishing agents are currently the most widely stockpiled and used type of foam extinguishing agent. The water film is a surfactant solution that diffuses onto the fuel surface after foam exudation. The water film plays a crucial role in achieving rapid fire extinguishing. However, current research focusing solely on the water film after foam stripping is limited; most studies indirectly and generally conclude that the water film is beneficial for fire extinguishing by comparing film-forming and non-film-forming foams. The GB 15308-2025 standard for foam extinguishing agents only determines the presence of a water film by calculating a positive diffusion coefficient. It does not address water film characteristic parameters or the differences in fuel containment and inhibition effects between different types of water films, which hinders in-depth research on foam extinguishing agents. Utility Model Content

[0003] This invention aims to solve the aforementioned problems. To this end, this invention provides a foam extinguishing agent water film performance testing device, capable of measuring water film thickness, water film diffusion rate, and water film sealing and inhibition time, thereby achieving a quantitative and comprehensive evaluation of water film performance and providing data support for a more complete assessment of foam extinguishing agent performance.

[0004] This utility model provides a foam extinguishing agent water film performance testing device, the technical solution of which is as follows: It includes a display, a high-definition video microscope, a high-speed camera, a syringe mechanism, an oil pan, and a timed igniter. The display is connected to the high-definition video microscope and the high-speed camera. The oil pan is used to hold fuel. The high-definition video microscope is placed next to the oil pan, with its lens flush with the surface of the fuel in the oil pan. The high-speed camera is placed perpendicular to the fuel surface. The syringe mechanism and the timed igniter are placed next to the oil pan. The syringe mechanism is used to inject foam extinguishing agent into the oil pan, and the timed igniter is used to ignite the fuel.

[0005] Furthermore, the oil pan is made of plexiglass.

[0006] Furthermore, the high-speed camera is positioned vertically above the oil pan, and its frame rate is 1000fps.

[0007] Furthermore, the high-definition video microscope is placed horizontally, with a magnification of 200x.

[0008] Furthermore, the needle of the syringe mechanism is in close contact with the inner wall of the oil pan.

[0009] Furthermore, the syringe mechanism is connected to the foam tube and the pigment tube respectively, and both the foam tube and the pigment tube are equipped with a one-way valve.

[0010] Furthermore, the timed igniter is placed horizontally, with its height from the fuel surface being 3-5 centimeters.

[0011] Furthermore, the timed igniter is fixed to the iron frame.

[0012] The above-described one or more technical solutions in the embodiments of this utility model have at least one of the following technical effects: This invention measures water film thickness using a high-definition video microscope with 200x magnification, records the diffusion process using a high-speed camera with 1000fps frame rate, and obtains the sealing inhibition time using a timed igniter. This allows for the simultaneous acquisition of key film formation parameters, providing accurate data support for performance evaluation.

[0013] The oil pan of this utility model is made of transparent organic glass. The high-definition video microscope lens is flush with the fuel surface and the high-speed camera is placed vertically. Combined with the mixed design of water-soluble pigment and foam extinguishing agent, it can clearly capture the complete process of water film diffusion and spreading, avoiding blind spots or blurry problems.

[0014] The syringe mechanism of this invention has a needle that fits tightly against the inner wall of the oil pan, ensuring that the foam solution flows slowly along the wall and avoiding disturbance to the fuel surface; the timer igniter is fixed to the iron stand and its height is adjustable, reducing human interference during the test.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram provided by this utility model.

[0018] Figure 2 This is a schematic diagram of the syringe mechanism provided by this utility model.

[0019] Figure label: 1. Monitor; 2. High-definition video microscope; 3. High-speed camera; 4. Syringe mechanism; 5. Fuel; 6. Oil pan; 7. Timer igniter; 8. Iron stand; 9. Foam tube; 10. Pigment tube; 11. One-way valve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The following embodiments are used to illustrate this utility model but should not be used to limit its scope.

[0021] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0022] The following is combined with Figure 1 and Figure 2 This invention provides a more detailed description of a foam fire extinguishing agent water film performance testing device: In this embodiment, as Figure 1 As shown, a foam fire extinguishing agent water film performance testing device is provided, including: a display 1, a high-definition video microscope 2, a high-speed camera 3, a syringe mechanism 4, an oil pan 6, and a timed igniter 7.

[0023] The display 1 is connected to both the high-definition video microscope 2 and the high-speed camera 3, with the high-definition video microscope 2 and the high-speed camera 3 sharing the display 1. The oil pan 6 is used to hold the fuel 5. The high-definition video microscope 2 is placed next to the oil pan 6, and is horizontally positioned with its lens flush with the surface of the fuel 5 in the oil pan 6. The high-speed camera 3 is located above the oil pan 6, and is vertically positioned perpendicular to the surface of the fuel 5.

[0024] The oil pan 6 is made of a transparent material. In this embodiment, the oil pan 6 is made of plexiglass. To clearly capture the foam extinguishing agent water film, the high-definition video microscope 2 has a magnification of 200x, and the high-speed camera 3 has a frame rate of 1000fps.

[0025] A syringe mechanism 4 and a timed igniter 7 are placed beside the oil pan 6. The syringe mechanism 4 is used to inject foam extinguishing agent into the oil pan 6. The needle of the syringe mechanism 4 is in close contact with the inner wall of the oil pan 6. The timed igniter 7 is used to ignite the fuel 5. The timed igniter 7 is fixed on the iron frame 8. The timed igniter 7 is placed horizontally above the oil pan 6.

[0026] In another embodiment, the needle of the syringe mechanism 4 is 1-2 cm above the surface of the fuel 5; preferably, it is 1 cm.

[0027] In another embodiment, water-soluble pigments are mixed into the foam extinguishing agent to enable clear imaging of the foam extinguishing agent water film. For example... Figure 2 As shown, the syringe mechanism 4 is connected to the foam tube 9 and the pigment tube 10, respectively, and both the foam tube 9 and the pigment tube 10 are equipped with a one-way valve 11. The foam tube 9 is used to deliver foam extinguishing agent into the syringe mechanism 4. The pigment tube 10 is used to deliver water-soluble pigment into the syringe mechanism 4.

[0028] In another embodiment, the timer igniter 7 is 3-5 cm above the surface of the fuel 5; preferably, it is 4 cm.

[0029] The working process of this embodiment is as follows: S1: The syringe mechanism 4 contains a colored foam solution. The foam concentrate is diluted with water to prepare a foam solution, which is then mixed with an appropriate amount of water-soluble pigment to obtain a colored foam solution. The oil pan 6 contains fuel 5. The high-definition video microscope 2 and the high-speed camera 3 are turned on.

[0030] S2: The needle of the syringe mechanism 4 presses against the inner wall of the oil pan 6 and injects a colored foam solution. The colored foam solution slowly flows along the pan wall to the surface of the fuel 5 contained in the oil pan 6 and diffuses to form a water film. During this process, the time it takes for the water film to diffuse from one end of the pan wall to the other is recorded by the high-speed camera 3, and the water film diffusion rate is calculated; the thickness of the water film is captured and measured by the high-definition video microscope 2.

[0031] S3: After the water film has fully spread for 30 seconds, use the timed igniter 7 to ignite at a frequency of 2 minutes / time until the fuel 5 in the oil pan 6 is ignited. Record the time from the first ignition to the combustion of fuel 5, which is recorded as the sealing and suppression time of the water film on the fuel.

[0032] Water film diffusion rate, water film thickness, and the time of water film's containment and inhibition of fuel can be used to evaluate the film-forming performance of foam extinguishing agents.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for testing the water film performance of foam fire extinguishing agents, characterized in that, include: The system includes a display, a high-definition video microscope, a high-speed camera, a syringe mechanism, an oil pan, and a timed igniter. The display is connected to both the high-definition video microscope and the high-speed camera. The oil pan is used to hold fuel. The high-definition video microscope is placed next to the oil pan with its lens flush with the surface of the fuel in the oil pan. The high-speed camera is placed perpendicular to the surface of the fuel. The syringe mechanism and the timed igniter are placed next to the oil pan. The syringe mechanism is used to inject foam extinguishing agent into the oil pan, and the timed igniter is used to ignite the fuel.

2. The foam fire extinguishing agent water film performance testing device as described in claim 1, characterized in that, The oil pan is made of plexiglass.

3. The foam fire extinguishing agent water film performance testing device as described in claim 1 or 2, characterized in that, The high-speed camera is located above the oil pan, placed vertically, and has a frame rate of 1000fps.

4. A foam fire extinguishing agent water film performance testing device as described in claim 1 or 2, characterized in that, The high-definition video microscope is placed horizontally and has a magnification of 200x.

5. The foam fire extinguishing agent water film performance testing device as described in claim 1, characterized in that, The needle of the syringe mechanism is in close contact with the inner wall of the oil pan.

6. The foam fire extinguishing agent water film performance testing device as described in claim 1, characterized in that, The syringe mechanism is connected to the foam tube and the pigment tube respectively, and both the foam tube and the pigment tube are equipped with a one-way valve.

7. The foam fire extinguishing agent water film performance testing device as described in claim 1, characterized in that, The timed igniter is placed horizontally, at a height of 3-5 cm above the fuel surface.

8. A foam fire extinguishing agent water film performance testing device as described in claim 1 or 7, characterized in that, The timed igniter is fixed to the iron frame.

Images