Smoke exhaust pipeline and method for improving smoke measurement precision of fire experiment

By designing a smoke exhaust pipe including coaxial nested outer and inner pipes, and setting up an opening adjustment component at the connection, the problem of insufficient or too fast smoke exhaust rate in combustion experiments of different scales is solved, and the flue gas measurement accuracy and the accuracy of test data are achieved.

CN119687304AActive Publication Date: 2025-03-25SICHUAN FIRE RES INST OF MEM +1
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Patent Information

Application Number
CN202510191575.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-21
Publication Date
2025-03-25
Estimated Expiration
2045-02-21

AI Technical Summary

Technical Problem

In the prior art, the design of smoke exhaust pipes is difficult to meet the needs of combustion experiments of different scales, resulting in insufficient smoke exhaust rate and insufficient combustion in large-scale tests; in small-scale tests, the smoke exhaust rate is too fast, and the flue gas flow rate cannot be accurately measured, which affects the accuracy of flue gas composition analysis.

Method used

A smoke exhaust pipe is designed including a first pipe section and a second pipe section. The first pipe section consists of a coaxial nested outer pipe and an inner pipe, and an opening adjustment component is provided at the connection to dynamically adjust the opening of the first pipe section to meet the needs of combustion tests of different scales.

Benefits of technology

By dynamically adjusting the opening of the first pipe section, the smoke exhaust rate can be increased in large-scale tests and the combustion is avoided inadequate; in small-scale tests, ensure that the flue gas is only sucked from the inner tube with a smaller diameter, improve the accuracy of flue gas component analysis, and enhance the accuracy and credibility of the test data.

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Abstract

The invention provides a smoke exhaust pipeline and method for improving smoke measurement accuracy in a fire experiment, the smoke exhaust pipeline comprises a first pipe section and a second pipe section, the air outlet end of the first pipe section is connected with the air inlet end of the second pipe section, and an opening degree adjusting assembly is arranged at the joint and used for dynamically adjusting the opening degree of the first pipe section; the first pipe section comprises an outer pipe and an inner pipe which are coaxially nested, and a first flue gas detection assembly and a second flue gas detection assembly are respectively arranged in the inner pipe and the second pipe section. The opening degree of the first pipeline can be adjusted through the opening degree adjusting assembly, and in a large-scale test, the opening degree of the outer pipe can be increased, the smoke exhaust rate can be increased, and the situation that combustion is not sufficient enough is avoided; in a small-scale test, flue gas can be sucked only from the inner pipe with a smaller diameter, so that the flow direction and the flow speed of the flue gas can be better controlled, weak combustion reaction can be effectively collected, the analysis precision of flue gas components is improved, and the accuracy and the credibility of test data results are ensured.
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