Needle flame test device for sound-absorbing cotton

Abstract

The utility model discloses a needle flame test device for sound-absorbing cotton. The needle flame test device for the sound-absorbing cotton comprises an ignition module, a quality inspection module and a clamping module, the ignition module is used for igniting the sound-absorbing cotton; the quality inspection module is located on the front side of the ignition module and used for identifying the states of the ignition module and the sound-absorbing cotton; the clamping module is located on the rear side of the ignition module and used for clamping sound-absorbing cotton. The clamping module comprises a lifting assembly and a clamp arranged on the lifting assembly. The lifting assembly drives the clamp to move up and down. The clamping module is connected with an external computer through a network cable; compared with the prior art, the position between flame and a sound-absorbing cotton sample can be adjusted in the detection process, so that the sound-absorbing cotton sample is completely combusted within specified time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of combustion test, specifically relates to a needle flame test device of sound absorbing cotton. BACKGROUND

[0002] Sound absorbing cotton is a kind of artificial inorganic fiber. It is made of natural minerals such as quartz sand, limestone and dolomite as main raw materials, combined with some chemical raw materials such as soda ash and borax to melt into glass. In the molten state, it is blown into a flocculent fine fiber by external force, and the fibers are cross-linked and intertwined with each other, showing many small gaps, which can effectively absorb sound energy and reduce noise. Sound absorbing cotton has good sound absorption rate, heat insulation, environmental protection, recyclability and adaptability to various environmental conditions, so it is widely used in building, interior decoration, transportation tools, industrial equipment and other fields to improve the acoustic environment and sound quality. Therefore, using sound absorbing cotton for range hood is an effective noise reduction measure. Sound absorbing cotton can absorb and reduce the noise generated during the operation of the range hood, improving the comfort of the kitchen.

[0003] The combustion test of sound absorbing cotton is to evaluate the combustion behavior of the material in a fire, including the burning speed, whether it will produce dripping, the amount of smoke released during combustion and the heat generated during combustion. These tests are crucial to ensure the safety of the material in environments such as buildings or vehicles.

[0004] The existing sound absorbing cotton combustion test is usually fixed by using a fixture clamp, then the needle flame device is moved horizontally to the sample for testing, the duration of applying the flame is 30s±1s, and the top center of the burner should always maintain a certain distance from the sample during the test, then the flame is automatically moved away.

[0005] However, when testing the sound absorbing cotton for range hood using the existing combustion test device according to the aforementioned method, the needle flame device is moved horizontally to the sample for testing, and after applying the flame, due to the fast burning speed of the sound absorbing cotton sample, the fixed sound absorbing cotton cannot meet the test requirements of maintaining a certain distance between the top center of the burner and the sample during the test, and therefore cannot better simulate the actual effect. For example, the Chinese invention patent with application number 202310829902.5 (grant announcement number CN117092277B) discloses a solid fuel combustion reaction kinetics parameter dynamic analysis device and method, the device includes a solid fuel combustion module, a solid fuel sampling module, a gas flow control module, an ignition module, a combustion image detection and analysis module, and a combustion spectrum detection and analysis module. The device realizes the visualization of the solid fuel combustion process, but during the test, the sample cannot be moved, so it cannot meet the test requirement of maintaining a certain distance between the top center of the burner and the sample. Utility model content

[0006] The utility model provides a needle flame test device of sound absorbing cotton, which can make the sound absorbing cotton sample burn out within a specified time during the detection process.

[0007] The utility model provides a needle flame test device of sound absorbing cotton, which can make the sound absorbing cotton sample burn out within a specified time during the detection process.

[0008] The ignition module is used for igniting the sound absorbing cotton.

[0009] The quality inspection module is located on the front side of the ignition module and is used for identifying the state of the ignition module and the sound absorbing cotton.

[0010] The needle flame test device further comprises a clamping module, which is located on the rear side of the ignition module and is used for clamping the sound absorbing cotton.

[0011] In order to drive the clamp to lift, preferably, the lifting assembly comprises:

[0012] A fixed plate;

[0013] A lifting rod, which is arranged in a spaced manner with the fixed plate and is provided with an external thread; and

[0014] A sliding block, which is arranged on the lifting rod, one side of the sliding block is connected with the fixed plate in a sliding manner, and the other side is fixedly connected with the clamp; the sliding block is provided with a through hole with an internal thread;

[0015] The lifting rod rotates to drive the sliding block to move up and down.

[0016] In order to provide power to the lifting assembly and control the lifting of the lifting assembly, preferably, the lifting assembly further comprises a motor, the power output end of the motor is connected with the lifting rod, and the motor is connected with the external computer.

[0017] In order to buffer and realize the stable connection between the lifting rod and the motor, preferably, a shaft coupling is arranged between the lifting rod and the output end of the motor; the lifting rod is arranged on the top of the shaft coupling.

[0018] Preferably, the fixed plate is provided with a guide groove, and correspondingly, the sliding block is provided with a guide block installed in the guide groove; the guide groove extends in the vertical direction.

[0019] In order to adjust the position of each module to adapt to different experimental conditions, preferably, the needle flame test device also includes two supports and a slide rail on the supports. The lifting component, quality inspection module and ignition module are all located on the slide rail and can move relative to the slide rail.

[0020] In order to move the quality inspection module and adapt to different experimental conditions, preferably, the quality inspection module includes a quality inspection base, which is disposed on a slide rail and can move relative to the slide rail;

[0021] The camera module is located on top of the quality inspection base and is connected to an external computer via a network cable.

[0022] Preferably, the imaging component includes two cameras spaced apart from each other. The two cameras capture two images of the same scene from different perspectives, and an external computer can then use the parallax information between these two images to calculate the three-dimensional position and depth distance of objects in the scene.

[0023] To enable ignition and allow the ignition module to be moved to adapt to different experimental conditions, preferably, the ignition module includes:

[0024] An ignition base is mounted on the slide rail and can move relative to the slide rail;

[0025] The bracket is located on top of the ignition base;

[0026] A burner, mounted on the bracket, is used to ignite the sound-absorbing cotton.

[0027] Preferably, the lifting assembly further includes a lifting base, which is disposed on a slide rail and can move relative to the slide rail; the fixing plate and the lifting rod are disposed on the lifting base.

[0028] Compared with the prior art, the advantages of this utility model are as follows: the clamping module includes a lifting component and a clamp on the lifting component. The lifting component can drive the clamp to move up and down, thereby causing the sound-absorbing cotton sample on the clamp to move relative to the ignition module. During the test, since the quality inspection module and the lifting component are connected to an external computer, after the quality inspection module identifies the status of the ignition module and the sound-absorbing cotton, the computer will control the lifting component of the clamping module through an algorithm to drive the clamp to move up and down, so that the sample and the flame of the ignition module always maintain a certain distance, thereby indirectly controlling the combustion state of the sound-absorbing cotton and ensuring that the sound-absorbing cotton burns out within a specified time. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0030] Figure 2 This is an exploded view of the clamping module in an embodiment;

[0031] Figure 3This is a schematic diagram of the quality inspection module in an embodiment;

[0032] Figure 4 This is a schematic diagram of the ignition module in an embodiment. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] like Figures 1-4 The diagram shows a preferred embodiment of this utility model. The needle flame test device for sound-absorbing cotton includes an ignition module 1, a quality inspection module 2, a clamping module 3, and a slide rail 4.

[0035] like Figure 1 and Figure 4 As shown, the ignition module 1 is used to ignite the sound-absorbing cotton; the ignition module 1 includes an ignition base 11, a bracket 12, and a burner 13. The ignition base 11 is mounted on the slide rail 4 and can move relative to the slide rail 4; the bracket 12 is mounted on the top of the ignition base 11; the burner 13 is mounted on the bracket 12 and is used to ignite the sound-absorbing cotton.

[0036] like Figure 3 As shown, the quality inspection module 2 is located in front of the ignition module 1. The quality inspection module 2 includes a quality inspection base 21 and a camera assembly 22. The quality inspection base 21 is mounted on a slide rail 4 and can move relative to the slide rail 4; the camera assembly 22 is located on top of the quality inspection base 21 and is connected to an external computer via a network cable. The camera assembly 22 includes two cameras spaced apart from each other. Two images of the same scene are captured from different perspectives by the two cameras. The parallax information between these two images is then used to calculate the three-dimensional position and depth distance of objects in the scene. This information is fed back to the PLC control system in the external computer, which adjusts the forward and reverse rotation angles of the servo motors based on the distance calculation results to achieve the lifting and lowering of the clamping device. Flame characteristics are identified through image processing algorithms based on the color, shape, and texture (dynamic changes of the flame).

[0037] The clamping module 3 is located behind the ignition module 1 and is used to clamp the sound-absorbing cotton. The clamping module 3 includes a lifting assembly 31 and a clamp 32. The clamp 32 and the lifting assembly 31 drive the clamp 32 to move up and down. The clamp 32 includes two clamping plates that are fixed to each other by screws and nuts.

[0038] like Figure 1 and Figure 2As shown, the lifting assembly 31 includes a fixed plate 33, a lifting rod 34, a slider 35, a motor 36, a coupling 38, and a lifting base 37. The fixed plate 33 has a guide groove 331, and correspondingly, the slider 35 has a guide block 351 installed within the guide groove 331; the guide groove 331 extends vertically. The lifting rod 34 is spaced apart from the fixed plate 33 and has external threads; the coupling 38 is located between the lifting rod 34 and the output end of the motor 36; the lifting rod 34 is located on top of the coupling 38. The slider 35 is located on the lifting rod 34, with one side slidably connected to the fixed plate 33 and the other side fixedly connected to the clamp 32. The slider 35 has a through hole with internal threads; the rotation of the lifting rod 34 drives the slider 35 to move up and down. The motor 36 provides power for the rotation of the lifting rod 34 and is connected to an external computer. The lifting base 37 is located on the slide rail 4 and can move relative to the slide rail 4; the fixed plate 33 and the lifting rod 34 are located on the lifting base 37.

[0039] The slide rail 4 is mounted on two supports 41. The clamping module 3, the quality inspection module 2 and the ignition module 1 are all mounted on the slide rail 4 and can move relative to the slide rail 4.

[0040] The usage process of this embodiment is as follows:

[0041] The sound-absorbing cotton to be tested is placed between the two clamps of the fixture 32 and clamped. The lifting base 37 is moved so that the lower left corner of the sound-absorbing cotton is 10mm above the top of the burner 13. The sound-absorbing cotton to be tested is then removed. After that, the burner 13 is ignited with a needle flame, and the flame height is adjusted to 12±1mm. The camera of the imaging component 22 is calibrated at a distance and parameters are set in the PLC control system of the external computer. The focal length of the camera is adjusted according to the distance measurement results to maintain the clarity and size of the flame and the object in the image. A standard allowable difference between the flame tip and the sample distance is set, and a test start and stop button is set. After the flame is extinguished, the sound-absorbing cotton to be tested is placed back in the fixture 32, the needle flame is ignited, and the test begins. During the test, when the camera detects in real time that the distance difference is greater than the standard difference, the system will issue a forward and reverse angle command of the motor corresponding to the same height at the distance through an algorithm, so that the sound-absorbing cotton to be tested and the burner 13 always maintain a certain distance to meet the requirement that the duration of the applied flame is 30s±1s.

Claims

1. A needle flame testing device for sound-absorbing cotton, comprising: Ignition module (1) is used to ignite the sound-absorbing cotton; The quality inspection module (2), located in front of the ignition module (1), is used to identify the status of the ignition module (1) and the sound-absorbing cotton; its features are: The needle flame test device also includes a clamping module (3), which is located behind the ignition module (1) and is used to clamp the sound-absorbing cotton. The clamping module (3) includes a lifting assembly (31) and a clamp (32) provided on the lifting assembly (31). The lifting assembly (31) drives the clamp (32) to move up and down. The quality inspection module (2) and the lifting assembly (31) are connected to an external computer.

2. The needle flame test device for sound-absorbing cotton according to claim 1, characterized in that: The lifting assembly (31) includes: Fixing plate (33); The lifting rod (34) is spaced apart from the fixed plate (33) and is provided with external threads; and A slider (35) is mounted on a lifting rod (34). One side of the slider (35) is slidably connected to a fixing plate (33), and the other side is fixedly connected to a clamp (32). The slider (35) is provided with a through hole with internal threads. The lifting rod (34) rotates, causing the slider (35) to move up and down.

3. The needle flame test device for sound-absorbing cotton according to claim 2, characterized in that: The lifting assembly (31) also includes a motor (36), the power output end of which is connected to the lifting rod (34), and the motor (36) is connected to an external computer.

4. The needle flame test device for sound-absorbing cotton according to claim 3, characterized in that: A coupling (38) is provided between the lifting rod (34) and the output end of the motor (36); the lifting rod (34) is located at the top of the coupling (38).

5. The needle flame test device for sound-absorbing cotton according to claim 2, characterized in that: The fixed plate (33) is provided with a guide groove (331), and the corresponding slider (35) is provided with a guide block (351) installed in the guide groove (331); the guide groove (331) extends in the vertical direction.

6. The needle flame test apparatus for sound-absorbing cotton according to any one of claims 1-5, characterized in that: The needle flame test device also includes a support (41) and a slide rail (4) on the support (41). The lifting component (31), the quality inspection module (2) and the ignition module (1) are all located on the slide rail (4) and can move relative to the slide rail (4).

7. The needle flame test device for sound-absorbing cotton according to claim 6, characterized in that: The quality inspection module (2) includes The quality inspection base (21) is mounted on the slide rail (4) and can move relative to the slide rail (4); The camera assembly (22) is located on top of the quality inspection base (21) and is connected to an external computer via a network cable.

8. The needle flame test device for sound-absorbing cotton according to claim 7, characterized in that: The shooting assembly (22) includes two cameras (221) spaced apart from each other.

9. The needle flame test device for sound-absorbing cotton according to claim 6, characterized in that: The ignition module (1) includes: Ignition base (11) is provided on the slide rail (4) and can move relative to the slide rail (4); A bracket (12) is disposed on top of the ignition base (11); and, A burner (13) is mounted on the bracket (12) and is used to ignite the sound-absorbing cotton.

10. The needle flame test device for sound-absorbing cotton according to claim 6, characterized in that: The lifting assembly (31) also includes a lifting base (37), which is mounted on the slide rail (4) and can move relative to the slide rail (4).

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