A backdraft test device for fire simulation

Abstract

The utility model relates to a kind of back burning test device for fire-fighting simulation, including back burning box, combustion rack and moving frame;When needing to simulate back burning phenomenon in the process of fire-fighting simulation, combustible can be placed on combustion rack, and it is ignited, then first damper and second damper are closed, after flame is extinguished by oxygen deficiency, first damper can be opened, make external air enter back burning box through first air inlet, and observe back burning phenomenon, then close first damper, make flame be extinguished by oxygen deficiency, then first damper and second damper are opened simultaneously, make a large amount of external air enter back burning box through first air inlet and second air inlet, observe more intense back burning phenomenon, simultaneously, temperature sensing piece is inducted stably, flue gas inductor analyzes flue gas concentration and flue gas composition, thus can better simulate experiment to back burning phenomenon more conveniently, reduce cost, and it is convenient to collect experimental data.

Description

Technical Field

[0001] This utility model relates to the field of fire simulation, and in particular to a backfire test device for fire simulation. Background Technology

[0002] Reignition, also known as deflagration, flashover, or resurgence, refers to the explosive and violent combustion that occurs when a large amount of fresh air rushes into a fire scene that was previously in an oxygen-deficient environment.

[0003] Flashback typically occurs in poorly ventilated indoor fires. When a room door is suddenly opened, or when the fire environment is disrupted, a large amount of air rushes in, causing the indoor oxygen concentration to rise rapidly. This brings the flammable gas mixture into the range of its explosive limits, resulting in an explosion or rapid combustion.

[0004] To better conduct fire rescue operations, fire brigades often conduct backfire simulation experiments. Traditional backfire simulation experiments are usually conducted in empty rooms. However, using empty rooms for backfire simulation experiments is not convenient, is costly, and makes it difficult to collect experimental data. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the aforementioned problems in the prior art, this utility model provides a fire simulation flashback test device that can better and more conveniently simulate flashback phenomena, reduce costs, and facilitate the collection of experimental data.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] A fire-fighting simulation flashback test device includes a flashback chamber, a combustion rack, and a movable frame. The combustion rack is installed inside the flashback chamber, and the movable frame is provided at the lower part of the flashback chamber.

[0010] A first air inlet is provided on one side of the combustion chamber, and a second air inlet is provided on the other side of the combustion chamber. A first air damper is provided on the first air inlet, and a second air damper is provided on the second air inlet.

[0011] The interior of the combustion chamber is lined with several temperature sensors.

[0012] A smoke sensor is installed in the upper part of the interior of the combustion chamber.

[0013] Furthermore, the combustion chamber is also equipped with a gas ignition source interface, and the gas ignition source interface is equipped with a sealing cover.

[0014] Furthermore, the mobile frame is connected to the lower part of the combustion chamber via several weight sensors.

[0015] Furthermore, the combustion chamber is also provided with an observation port, and the observation port is fitted with an observation window.

[0016] Furthermore, there are two first air inlets, and one of the first air dampers is connected to one of the first air inlets via a hinge.

[0017] Furthermore, the second damper is connected to the second air inlet via a hinge.

[0018] Furthermore, the combustion chamber is composed of six heat insulation panels, the interior of which is filled with heat insulation material.

[0019] Furthermore, it also includes a controller, which is electrically connected to the temperature sensor, the smoke sensor and the weight sensor respectively.

[0020] (III) Beneficial Effects

[0021] The beneficial effects of this invention are as follows: When it is necessary to simulate the flashback phenomenon during fire simulation, combustibles can be placed on the combustion rack and ignited. Then, the first and second air dampers are closed. After the flame is extinguished due to lack of oxygen, the first air damper can be opened to allow external air to enter the flashback chamber through the first air inlet, and the flashback phenomenon can be observed. Then, the first air damper is closed again to extinguish the flame due to lack of oxygen. Then, the first and second air dampers are opened simultaneously to allow a large amount of external air to enter the flashback chamber through the first and second air inlets, and a more intense flashback phenomenon can be observed. At the same time, the temperature sensor is used to stabilize the temperature, and the smoke concentration and composition are analyzed by the smoke sensor. This allows for better and more convenient simulation experiments of the flashback phenomenon, reduces costs, and facilitates the collection of experimental data. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the fire-fighting simulation flashback test device according to an embodiment of the present invention;

[0023] Figure 2 This is a front view of the overall structure of the fire-fighting simulation flashback test device according to an embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of the flashback chamber in the fire simulation flashback test device according to an embodiment of the present invention;

[0025] [Explanation of Labels in the Attached Image]

[0026] 1. Reburning box; 2. First air damper; 3. Moving frame; 4. Observation window; 5. Combustion frame; 6. Weight sensor; 7. Second air damper; 8. Heat insulation material; 9. Smoke sensor; 10. Temperature sensor; 11. Gas ignition source interface. Detailed Implementation

[0027] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Please refer to Figures 1 to 3 As shown, a fire simulation flashback test device of this utility model includes a flashback box 1, a combustion rack 5 and a movable frame 3. The combustion rack 5 is installed inside the flashback box 1, and the movable frame 3 is provided at the lower part of the flashback box 1.

[0029] A first air inlet is provided on one side of the combustion chamber 1, and a second air inlet is provided on the other side of the combustion chamber 1. A first air damper 2 is provided on the first air inlet, and a second air damper 7 is provided on the second air inlet.

[0030] The interior of the combustion chamber 1 is lined with several temperature sensing elements 10;

[0031] A smoke sensor 9 is installed in the upper part of the interior of the combustion chamber 1.

[0032] The working principle of this utility model is as follows: When it is necessary to simulate the flashback phenomenon during the fire simulation process, the combustible material can be placed on the combustion rack 5 and ignited. Then, the first air door 2 and the second air door 7 are closed. After the flame is extinguished due to lack of oxygen, the first air door 2 can be opened to allow external air to enter the flashback box 1 through the first air inlet and observe the flashback phenomenon. Then, the first air door 2 is closed to extinguish the flame due to lack of oxygen. Then, the first air door 2 and the second air door 7 are opened simultaneously to allow a large amount of external air to enter the flashback box 1 through the first air inlet and the second air inlet, and observe a more intense flashback phenomenon. At the same time, the temperature sensor 10 senses the stability, and the smoke concentration and smoke composition are analyzed by the smoke sensor 9.

[0033] Furthermore, the combustion chamber 1 is also provided with a gas ignition source interface 11, and the gas ignition source interface 11 is provided with a sealing cover.

[0034] As can be seen from the above description, it is beneficial to introduce combustion gas into the interior of the combustion chamber 1 through the gas ignition source interface 11 to promote combustion.

[0035] Furthermore, the mobile frame 3 is connected to the lower part of the combustion chamber 1 via several weight sensors 6.

[0036] As can be seen from the above description, it is beneficial to use the weight sensor 6 to sense the consumption of burning materials and reflect the degree to which the fire is affected by ventilation.

[0037] Furthermore, the combustion chamber 1 is also provided with an observation port, and an observation window 4 is embedded in the observation port.

[0038] As can be seen from the above description, it is beneficial to observe the combustion situation inside the combustion chamber 1 through the observation window 4.

[0039] Furthermore, there are two first air inlets, and one of the first air dampers 2 is connected to one of the first air inlets via a hinge.

[0040] As can be seen from the above description, it is beneficial to observe the backfire situation by opening different numbers of the first air doors 2.

[0041] Furthermore, the second damper 7 is connected to the second air inlet via a hinge.

[0042] As can be seen from the above description, it is beneficial to observe the backfire situation by opening the second air door 7.

[0043] Furthermore, the combustion chamber 1 is composed of six heat insulation panels, and the interior of the heat insulation panels is filled with heat insulation material 8.

[0044] As can be seen from the above description, it is beneficial to reduce the heat loss from the combustion chamber 1 by using the heat insulation material 8.

[0045] Furthermore, it also includes a controller, which is electrically connected to the temperature sensor 10, the smoke sensor 9 and the weight sensor 6 respectively.

[0046] As can be seen from the above description, it is advantageous to receive signals from the temperature sensor 10, the smoke sensor 9, and the weight sensor 6 through the controller. Example 1

[0047] Please refer to Figures 1 to 3 A fire-fighting simulation flashback test device includes a flashback chamber 1, a combustion rack 5, and a movable frame 3. The combustion rack 5 is installed inside the flashback chamber 1, and the movable frame 3 is provided at the lower part of the flashback chamber 1.

[0048] A first air inlet is provided on one side of the combustion chamber 1, and a second air inlet is provided on the other side of the combustion chamber 1. A first air damper 2 is provided on the first air inlet, and a second air damper 7 is provided on the second air inlet.

[0049] The interior of the combustion chamber 1 is lined with several temperature sensing elements 10;

[0050] The temperature sensing element 10 is a thermocouple;

[0051] A smoke sensor 9 is installed in the upper part of the interior of the combustion chamber 1;

[0052] The flue gas sensor 9 is an electrochemical sensor;

[0053] The combustion chamber 1 is also provided with a gas ignition source interface 11, and the gas ignition source interface 11 is provided with a sealing cover;

[0054] The mobile frame 3 is connected to the lower part of the combustion chamber 1 through several weight sensors 6;

[0055] The combustion chamber 1 is also provided with an observation port, and an observation window 4 is embedded in the observation port;

[0056] The observation window 4 is made of high-temperature resistant glass;

[0057] There are two first air inlets, and one first air damper 2 is connected to one of the first air inlets by a hinge;

[0058] The second damper 7 is connected to the second air inlet via a hinge;

[0059] The combustion chamber 1 is composed of six heat insulation panels, and the interior of the heat insulation panels is filled with heat insulation material 8.

[0060] The heat insulation material 8 is made of glass fiber;

[0061] It also includes a controller, which is electrically connected to the temperature sensor 10, the smoke sensor 9 and the weight sensor 6 respectively.

[0062] The above describes the basic principles, main features, and advantages of this utility model. All standard parts used in this utility model can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods for each part all adopt conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and the circuit connections adopt conventional connection methods in the prior art, which will not be detailed here.

[0063] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A fire-fighting simulation flashback test device, characterized in that: It includes a combustion chamber, a combustion rack, and a movable frame. The combustion rack is installed inside the combustion chamber, and the movable frame is provided at the lower part of the combustion chamber. A first air inlet is provided on one side of the combustion chamber, and a second air inlet is provided on the other side of the combustion chamber. A first air damper is provided on the first air inlet, and a second air damper is provided on the second air inlet. The interior of the combustion chamber is equipped with several temperature sensors; A smoke sensor is installed in the upper part of the interior of the combustion chamber.

2. The fire simulation flashback test device as described in claim 1, characterized in that: The combustion chamber is also equipped with a gas ignition source interface, and the gas ignition source interface is equipped with a sealing cover.

3. The fire simulation flashback test device as described in claim 1, characterized in that: The mobile frame is connected to the lower part of the combustion chamber via several weight sensors.

4. The fire simulation flashback test device as described in claim 1, characterized in that: The combustion chamber is also equipped with an observation port, which has an observation window embedded in it.

5. The fire simulation flashback test device as described in claim 1, characterized in that: There are two first air inlets, and one of the first air dampers is connected to one of the first air inlets via a hinge.

6. The fire simulation flashback test apparatus as described in claim 5, characterized in that: The second damper is connected to the second air inlet via a hinge.

7. The fire simulation flashback test device as described in claim 1, characterized in that: The combustion chamber consists of six heat insulation panels, the interior of which is filled with heat insulation material.

8. The fire simulation flashback test device as described in claim 3, characterized in that: It also includes a controller, which is electrically connected to the temperature sensor, the smoke sensor and the weight sensor respectively.

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