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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 conditions, and the above-mentioned device Only measuring the temperature of the heated surface and the back surface of the protective clothing, or setting a small number of measuring points inside the protective clothing, cannot accurately measure the temperature of each layer inside the protective clothing

Method used

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

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Embodiment 1

[0023] figure 1A schematic diagram of the configuration and structure principle of the experimental test device for simulating the internal heat transfer mechanism of multi-layer protective clothing is provided; figure 2 It is a structural schematic diagram of the sweating plate 16; image 3 It is a structural schematic diagram of the front splint 6 of the sample; Figure 4 It is a schematic diagram of the structure of the rear splint 8 of the sample. As shown in the accompanying drawings, the present invention simulates the experimental test device of the internal heat transfer mechanism of multi-layer protective clothing, including a heat source (2) whose cooling surface is a vertical plane, a preheating shielding plate (3), 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) and (9b) which are similar in shape to the periphery of the tested ...

Embodiment 2

[0032]In this embodiment, the tested sample (7) with thermocouples installed on each layer is placed on the sample bottom plate (6C), and the sample positioning needle (10) on the sample bottom plate (6C) passes through the tested sample (7) In the present embodiment, pads are not added on the fixed rod (33), but the fixed rod hole (39) around the sweating plate (16) is directly penetrated into the fixed rod (33), and each fixed rod (33) Tighten the screws. At this time, the tested sample (7) is located between the sweating plate (16) and the sample bottom plate (6C), the tested sample (7) is close to the sweating plate (16), and the tested sample (7) is in contact with the sweating plate ( 16) The air layer gaps between and between layers of fabrics are all 0. The sample installation method of this embodiment can simulate the heat transfer inside the fabric when the fabric is close to the skin.

Embodiment 3

[0034] Heat source (2) among the present embodiment adopts resistance wire heater, and the resistance wire that diameter is 3mm is wound on 460mm long, and diameter is on 12 carbon rods of 25mm, and the carbon rod (25) that has wound resistance wire is mutually spaced 25mm , framed in parallel in the heat-insulating frame (24) perpendicular to the bottom plate (1), forming a heat-dissipating surface with a vertical plane and a heat-dissipating area of ​​625mm×460mm, and the heat flow intensity is 15kw / m 2 . After passing each layer of the sample to be tested (7) through the sample positioning needle (10) on the sample bottom plate (6C), add a gasket with an inner diameter of 1mm and a thickness of 2mm on each sample positioning needle (10) , after each layer of samples is fixed, insert the fixing rod holes (39) around the sample rear splint (8) into the fixing rods (33), and screw on each fixing rod (33); When the valve of the water system (12) is closed, the effect of human ...

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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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