CN204203144U - Vertically fixing molten thermoplastic material drips the experiment porch that ignites - Google Patents

Abstract

The utility model discloses a kind of vertically fixing molten thermoplastic material and drip the experiment porch that ignites, comprise radiation source support (1#), radiant heating source (2#), specimen mounting (3#) and Weighing system (4#), can be heated vertically fixing sample by radiation source, can study respectively and naturally to ignite without electric spark and electric spark ignites two kinds of different operating modes, and measure the mass change of material monolithic and the mass change of melting drippage part by two electronic balances simultaneously, thermopair and heat flow meter is utilized to measure material surface temperature and heat flux distribution rule.In radiation heating process, studied the melting drippage ignition behavior of thermoplastic by the situation of change measuring burning time, quality and the temperature of vertically fixing thermoplastic under the factor impacts such as different sparking mode, different radiation intensity.This experiment porch research external wall organic insulation material is lighted and burning behavior significant.

Description

Vertically fixing molten thermoplastic material drips the experiment porch that ignites

Technical field

The utility model belongs to technical field of fire safety, specifically for the experiment porch of the melting drippage ignition behavior under vertical radiation heating condition of thermoplastic (XPS, EPS) in typical organic architecture external thermal insulation system.

Background technology

Along with improving constantly of socioeconomic develop rapidly and people's lives quality, people are also growing to the demand of the energy." energy-saving and emission-reduction " have become the Important Action ensureing Chinese national economy sustainable development, and building energy conservation is a wherein particularly important ring.But, owing to lacking the assessment of corresponding fire precautions legislation and relevant fire risk, external-wall heat-insulation material flammable, inflammable is in a large number used to large public building and skyscraper, fire failure is in recent years caused to happen occasionally, serious threat people's life and property safety, cause negative social influence.Finding shows, with EPS, XPS thin-coat plaster system is that organic external thermal insulation system of representative accounts for major part at external thermal insulation system, and there is higher fire risk, research EPS, XPS this kind of Typical thermoplastic material and its by thermal ignition rule, there is very strong realistic meaning outside in wall outer heat preservation system.

The cone calorimetry specification of ISO5660 is mainly contained in existing standard, but under only considering sample horizontal positioned condition by thermal ignition rule, be not suitable for studying melting drippage that sample causes due to Action of Gravity Field under vertical heating condition to its influence by thermal ignition, the fire risk for research external thermal insulation system is difficult to consider real environmental baseline.In prior art, close file such as number of patent application 200910184963.0 (application publication number CN 101696888 A) discloses a kind of fire test device, and it only considers the impact of indoor flooded conditions on buildings outside wall surface; Burning chamber volume is immutable; Research emphasis is different: documents data stresses the impact of indoor overflow for other building wall on slope.Number of patent application 201310323651.X (application publication number CN 103389254 A) also refer to the insulation material Spread Characteristics experimental provision under a kind of external radiation condition, the fire spread behavior after but this device ignites mainly for material, sample surfaces cannot obtain uniform radiant heat flux, the heat trnasfer behavior of its inside is complicated Three Dimensional Thermal conduction, is not the One-dimensional heat transfer process of thickness direction; In addition arrange the gentle trickling groove of test days between the specimen holder of this experimental provision and radiation source, both spacing regulate and are restricted, and sample surfaces cannot obtain the radiant heat flux of high strength.

Summary of the invention

The utility model mainly considers under vertical radiation heating condition; in external thermal insulation system thermoplastic with or without protective seam, material thickness to its heat shrinkable; melting is dripped, and the impact that pyrolysis is ignited, analyzes the relation that its mass change and sample surfaces and internal temperature change.

The technical solution adopted in the utility model is: a kind of vertically fixing molten thermoplastic material drips the experiment porch that ignites, it is characterized in that: comprise adjustable radiation source support 1#, radiant heating source 2#, specimen mounting 3# and Weighing system 4#, wherein radiant heating source 2# is vertically fixed on radiation source support 1#, Weighing system 4# is positioned at immediately below specimen mounting 3#, radiation source support 1# and specimen mounting 3# place face-to-face and mutual spacing from adjusting arbitrarily;

Temperature acquisition system, especially by the many groups thermopair be arranged on sample axis, measures the change of the temperature of specimen surface and the temperature at the sample back side; Often organize thermopair to be made up of the thermopair of 2 diameter 1mm; 2 thermopairs are arranged in surface and the back side of sample;

This radiation source support height is 1100mm, and base depth is 450mm, and width is 300mm;

This radiant heating source height 775mm, wide 300mm, thick 60mm;

This specimen mounting fixes laboratory sample by groove, and it is high that this groove surfaces is of a size of 400mm, and 100mm is wide.

The utility model advantage is compared with prior art:

1), the utility model can the feature of melting drippage after being heated in conjunction with the radiation of current external wall organic insulation material (thermoplastic), research object is vertically fixed on specimen mounting, can studies its melting drippage and to ignite behavior;

2) radiation heating is carried out to vertically fixing sample in the electric radiation source that, this platform utilizes standard adjustable;

3), this platform considers and naturally to ignite without electric spark and two kinds of scenes that electric spark ignites;

4), this platform can change and melting drippage sample segment mass change by synchro measure sample total quality;

5), this platform can measure surface and internal temperature change in molten thermoplastic material drippage process.

Accompanying drawing explanation

Fig. 1 is that experiment porch is always schemed;

Fig. 2 is radiation source bracket side view;

Fig. 3 is radiation source front elevation;

Fig. 4 is the oblique 45° angle schematic diagram of sample mount and electronic balance;

Fig. 5 is facing and side view of temperature measurement system thermopair position.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further illustrated.

The utility model amounts to 4 part compositions primarily of 1#, 2#, 3#, 4#, as shown in Figure 1.Radiant heating source 2# is vertically fixed on radiation source support 1# by 4 screws; Weighing system 4# is positioned at immediately below specimen mounting 3#, and wherein large electronic balance contacts with specimen mounting, and for measuring the change of sample total quality, little electronic balance does not contact with specimen mounting, measures melting drippage sample segment mass change by feeder; Radiation source support 1# and specimen mounting 3# place face-to-face and mutual spacing from adjusting arbitrarily.

1# is radiation source support, as shown in Figure 2.Radiation source support height is 1100mm, and base depth is 450mm, and width is 300mm.Support by carbon steel processing and manufacturing, and has 4 hole slots above support, can combine the height regulating radiant panel with radiant panel.

2# is radiation source, as shown in Figure 3.This radiation source height 775mm, wide 300mm, thick 60mm, the quartz electrothermal tube 2-1# vertically arranged by 15 and pad etc. form, single electrothermal tube can provide the power stage of 2.5kW, total can provide the power stage of 37.5kW, and is equipped with power regulating eqiupment that radiant panel can be regulated to export different radiation powers, meets the requirement of experiment under different distance, different radiation intensity condition; 2-2# is the insulated heat device at side and the back side adopting ceramic beaverboard to make, and can ensure that the power of radiation more arrives specimen surface as much as possible, improve the efficiency of radiant heating panel; 2-3# is stainless steel casing, plays fixing effect.Radiation source is fixed on radiation source support by 4 screws, and can experimentally require to regulate radiant panel height, meets the requirement of heating the sample of differing heights position.

3# is specimen mounting, as shown in Figure 4.Laboratory sample is fixed mainly through groove 3-1#, and the requirement of different-thickness sample is met by adjustable bolt, wherein to be of a size of 400mm high for groove surfaces, and 100mm is wide, sample surfaces size much smaller than radiation source size to ensure that in experimentation, sample surfaces radiation intensity is even; The building enclosure 3-2# that sample surrounding is made by ceramic beaverboard, with the adiabatic environment of the surrounding and the back side that ensure sample.

4# Weighing system, as shown in Figure 4.Be mainly used in the device weighing sample mass and drippage quality, be made up of 2 electronic balances and supporting structure, to ensure the change of synchronous Weighing system quality and drippage quality.Wherein large electronic balance 4-1# is positioned at immediately below specimen mounting, directly contacts with specimen mounting; Little electronic balance 4-2# is positioned at the proceeds posterolateral of specimen mounting, and extends to below sample by a metal support by the feeder collecting melting drippage sample, contacts without any with whole specimen mounting system.

Temperature testing device is shown in Fig. 5, the temperature on the main sample back side, measurement differing heights position and surface, thermopair group is made up of the thermopair of 2 diameter 1mm, the mark in accompanying drawing 5 is seen in position, is arranged in sample surfaces and the sample back side respectively and measures its temperature variations under radiation heating condition.

As shown in Figure 1, first the distance between radiation source and specimen surface is demarcated, and it can be used as the initial parameter of experiment, then sample is fixed on the 3# experimental provision of Fig. 1 mark, the thermofin that fiberboard makes is around sample, ensure that the side surrounding of sample and the back side are adiabatic environment, mass measurement collects by the feeder below experiment table the part that sample melting drips, and by the mass change of 4-1# and the 4-2# electronic balance synchro measure gross mass marked and melting drippage part.The thermocouple location vertically disposed thermopair group measurement of many groups is as shown in Figure 5 arranged in temperature survey, Fig. 5 is shown in by the arrangement detail drawing of thermopair, its each thermopair group is made up of the surface and the back side that are arranged in sample 2 thermopairs, the ceramic fiber postlaminar part at the sample back side is equipped with rotary screw, can the position of adjusting sample back side ceramic beaverboard, meet the requirement of experiment of different-thickness sample.

Claims (1)

1. the molten thermoplastic material vertically fixed drips the experiment porch that ignites, it is characterized in that: comprise radiation source support (1#), radiant heating source (2#), specimen mounting (3#) and Weighing system (4#), wherein radiant heating source (2#) is vertically fixed on radiation source support (1#), Weighing system (4#) is positioned at immediately below specimen mounting (3#), radiation source support (1#) and specimen mounting (3#) place face-to-face and mutual spacing from adjusting arbitrarily;

Temperature acquisition system, especially by the many groups thermopair be arranged on sample axis, measures the change of the temperature of specimen surface and the temperature at the sample back side; Often organize thermopair to be made up of the thermopair of 2 diameter 1mm; 2 thermopairs are arranged in surface and the back side of sample;

This radiation source support (1#) is highly 1100mm, and base depth is 450mm, and width is 300mm;

This radiant heating source (2#) high 775mm, wide 300mm, thick 60mm;

This specimen mounting (3#) fixes laboratory sample by groove (3-1#), and this groove (3-1#) surface size is that 400mm is high, and 100mm is wide.