Sample containing device for cone calorimeter and method for measuring fused solid and liquid samples by using same

Abstract

The invention discloses a sample containing device for a cone calorimeter and a method for measuring fused solid and liquid samples by using the same. The sample containing device comprises a containing cavity, side walls for enclosing the containing cavity and a bottom wall, wherein the cross section of the containing cavity is circular; the sample containing device is further provided with a movable baffle for shielding the containing cavity; the interiors of the side walls and / or the bottom wall form a cavity; the cavity is internally provided with a high-temperature-resisting heat-insulation filler layer; scales are arranged on one side of the containing cavity enclosed by the side walls. The sample containing device disclosed by the invention is especially suitable for determining powder and liquid samples by matching with the cone calorimeter; the structure guarantees that the samples can be heated uniformly in the detection process and the testing accuracy is improved; the sample containing device is easy to clean and is good in heat-insulation effect; the testing method does not need to use an aluminum foil so that the cost is saved and sample preparation is simplified; meanwhile, an error caused by combusting the aluminum foil in the testing process is reduced and the testing is accurate.

Description

technical field [0001] The invention belongs to the field of material combustion performance analysis, in particular to a sample holding device for a cone calorimeter and a method for measuring molten solid and liquid samples by using the device. Background technique [0002] With economic development and social progress, the frequency of fires and the losses they cause are also increasing. Nowadays, the loss caused by fire every year cannot be counted, so people pay more and more attention to the research of fire. The test environment of the cone calorimeter is considered to be the most representative of the combustion environment of the actual fire. Since it was launched by the National Institute of Standards and Technology NIST (formerly the National Bureau of Standards NBS) in 1982, it has been adopted by more and more laboratories around the world. Adoption, the function of the instrument is more and more perfect. The cone calorimeter can classify the combustion haza...

AI Technical Summary

Problems solved by technology

When the cone calorimeter tests a liquid sample or a sample that melts and drips when it is burned, the test will be inaccurate and the repeatability will be poor due to the failure of the device described in ISO:5660-2002 or the loss of mass during combustion

[0003] For the current testing of powder or liquid samples, patent CN102175718A discloses a method for measuring the combustion performance of powder or liquid samples with a cone calorimeter, and specifically discloses a device for this test method, a specific box Crucible, but this device has poor heat insulation and serious heat loss, which affects the accuracy of the test results; and the square structure of the device is difficult to ensure uniform radiation intensity on the entire heating surface, especially at the corners, so that the accuracy of the test cannot be guaranteed. For volatile samples (such as alcohol), it is easy to cause mass loss before ignition, which will affect the accuracy of the test results; because there is no scale, it is difficult to guarantee the actual radiation intensity of the sample and the accuracy of the results.

It can be seen that although the device and its test method disclosed in the patent CN102175718A can guarantee the consistency in the parallel sample test, the accuracy is difficult to guarantee

Images