Experimental test device for simulating internal heat transfer mechanism of multi-layer protective clothes

A test device and heat transfer technology, applied in the direction of thermal conductivity of materials, etc., can solve the problems such as the inability to simulate the heat transfer of protective clothing, the inability to consider the continuous sweating of the human body, and the inability to accurately measure the temperature of protective clothing, etc., to achieve repeatable operation, The effect of stable working performance and reasonable device structure

Inactive Publication Date: 2011-09-14
UNIV OF SCI & TECH OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the moisture inside the protective clothing will gradually decrease over time, this type of device cannot consider the continuous application of external moisture and the continuous sweating of the human body, so it cannot simulate the internal heat transfer of protective clothing under real c

Method used

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  • Experimental test device for simulating internal heat transfer mechanism of multi-layer protective clothes
  • Experimental test device for simulating internal heat transfer mechanism of multi-layer protective clothes
  • Experimental test device for simulating internal heat transfer mechanism of multi-layer protective clothes

Examples

Experimental program
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Example Embodiment

[0022] Example 1:

[0023] figure 1A schematic diagram of the configuration and structure principle of the experimental testing device for simulating the internal heat transfer mechanism of the multi-layer protective clothing of the present invention is given; figure 2 is a schematic structural diagram of the sweating plate 16 therein; image 3 is the structural schematic diagram of the front splint 6 of the sample; Figure 4 It is a schematic diagram of the structure of the splint 8 after the sample. As shown in the above drawings, the experimental test device for simulating the internal heat transfer mechanism of the multi-layer protective clothing of the present invention includes a heat source (2) whose heat dissipation surface is a vertical plane, a preheating shielding plate (3), and a water spray system (12). ), the sample front splint (6), the sample rear splint (8), the sweating system (14) and the measurement and control system (19); There are sample holes (9a) ...

Example Embodiment

[0031] Example 2:

[0032]In this embodiment, the tested sample (7) with thermocouples installed in each layer is placed on the sample bottom plate (6C), and the sample positioning pin (10) on the sample bottom plate (6C) passes through the tested sample (7) ; In this embodiment, do not add a gasket on the fixed rod (33), but directly insert the fixed rod hole (39) around the sweat plate (16) into the fixed rod (33), and in each fixed rod (33) Screw on. At this time, the sample to be tested (7) is located between the sweat plate (16) and the sample bottom plate (6C), the sample to be tested (7) is close to the sweat plate (16), and the sample to be tested (7) is connected to the sweat plate (6C). 16) and the air layer gap between each layer of fabric is 0. The sample installation method of this embodiment can simulate the heat transfer inside the fabric when the fabric is close to the skin.

Example Embodiment

[0033] Example 3:

[0034] The heat source (2) in this embodiment adopts a resistance wire heater, and a resistance wire with a diameter of 3 mm is wound on 12 carbon rods with a length of 460 mm and a diameter of 25 mm, and the carbon rods (25) wound with the resistance wire are separated by 25 mm. , placed in parallel in the heat-insulating frame (24) perpendicular to the bottom plate (1) to form a heat-dissipating surface with a vertical plane and a heat-dissipating area of ​​625mm×460mm, and the heat flow intensity is taken as 15kw / m 2 . After passing each layer of the tested sample (7) through the sample positioning needles (10) on the sample bottom plate (6C), add a spacer with an inner diameter of 1 mm and a thickness of 2 mm to each sample positioning needle (10) , after each layer of samples is fixed, insert the fixing rod holes (39) around the rear splint (8) of the sample into the fixing rods (33), and screw on each fixing rod (33); The valve of the water system (...

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Abstract

The invention discloses a test device for simulating an internal heat transfer mechanism of multi-layer protective clothes. The test device is characterized in that: a sweating board capable of sweating continuously is arranged on the side of a tested sample; the sweating board can adjust water temperature and components and can adjust sweat components, sweat temperature, sweating quantity and sweating speed by controlling overflowed water quantity; the sample is fixed by a sample front clamping plate and a sample rear clamping plate and by adopting pinhole structures; air layer thickness among each layer of fabric can be adjusted by changing pads on pins, so that layer quantity, thickness, structure and surface state of the sample can be adjusted according to requirements without limit, and the tested samples have more types and are more flexible in use; and the defect that the influence of continuous water application on the internal heat transfer of the protective clothes cannot be measured in the prior art is overcome, so that the test data has higher authenticity. The test device has a reasonable structure and stable working performance, is easy to operate, can realize repeated operation, can provide basis for establishment of a protective clothes internal heat and dampness transfer mechanism model, and meets requirements of the test and production.

Description

technical field [0001] The invention belongs to the technical field of thermal safety engineering testing, and in particular relates to a simulation experiment testing device for the internal heat transfer mechanism of multi-layer fabrics, especially firefighters' fire extinguishing protective clothing. Background technique [0002] Firefighters wear protective clothing to carry out fire fighting and rescue in dangerous and harsh environments. The thermal protection performance and comfort of protective clothing directly affect the life safety of firefighters. Measuring the internal heat transfer parameters of protective clothing under different radiation conditions and establishing the heat transfer model of protective clothing is the key to improving the thermal protection performance of firefighting clothing, improving the safety of firefighters during fire fighting and rescue, and increasing the comfort of firefighters' protective clothing during fire fighting and rescue....

Claims

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Application Information

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IPC IPC(8): G01N25/18
Inventor 黄冬梅张和平赵庆漆政昆许磊何松程旭东
Owner UNIV OF SCI & TECH OF CHINA
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