Device for testing axial thermal conductivity of tubular materials

A thermal conductivity and tubular technology, which is applied in the field of devices for testing the axial thermal conductivity of tubular materials, can solve the problem of no axial thermal conductivity of tubular materials, and achieve the effect of avoiding heat loss

Active Publication Date: 2015-09-23
RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is currently no test method for the axial thermal conductivity of tubular materials

Method used

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  • Device for testing axial thermal conductivity of tubular materials
  • Device for testing axial thermal conductivity of tubular materials

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Embodiment Construction

[0023] A device for testing the axial thermal conductivity of tubular materials of the present invention will be described in detail below in conjunction with the accompanying drawings and specific examples:

[0024] like figure 1 As shown, a device for testing the axial thermal conductivity of tubular materials includes an annular heater 1 arranged between the end faces of two tubular materials to be tested 9 that are identical in material and appearance size, and the tubular materials to be tested 9 are far away from One end of the ring heater 1 is provided with a cooling ring 2; the ring heater 1 is an annular sheet, and the inner diameter and the outer diameter of the ring heater 1 are the same as the inner diameter and the outer diameter of the tubular material 9 to be tested; No less than three temperature-measuring elements 3 are pasted on the outer walls of both ends of the tubular material 9, and the temperature-measuring elements 3 at each end are evenly distributed ...

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Abstract

The invention discloses a device for testing axial heat conduction coefficient of a tubular material, which belongs to the field of heat conduction coefficient tests. The device comprises an annular heater which is arranged between the end surfaces of two tubular materials to be tested with the identical material and appearance size, wherein one end, away from the annular heater, of each tubular material to be tested is provided with a heat radiating ring; the annular heater is an annular sheet, and the inner diameter and the outer diameter of the annular heater are identical to those of the tubular material to be tested; the outer walls of two ends of the tubular material to be tested are respectively provided with at least three temperature measuring elements in an adhering manner, and the temperature measuring elements on each end are uniformly distributed along an annular form parallel to the end surface of the tubular material to be tested; the temperature measuring elements are connected with a temperature display instrument through a lead. By adopting the device, the problem for measuring the axial heat conduction coefficient of the tubular material with anisotropy of the heat conduction performance can be solved, and by adopting the method that two samples to be tested are symmetrically distributed, the measurement error problem caused by the heat loss of the heater can be avoided.

Description

technical field [0001] The invention belongs to the field of thermal conductivity testing, in particular to a device for testing axial thermal conductivity of tubular materials. Background technique [0002] Experimental measurement is the main method to obtain the thermal conductivity of materials. According to the change of temperature with time in the test measurement process, it is mainly divided into two categories: steady-state method and transient method (or dynamic method). Steady-state methods include heat flow meter method, protected hot plate method, circular tube method, etc.; transient methods include hot wire method, tropical method, constant power heat source method, laser flash method, etc. The steady-state method has the characteristics of clear principle and can obtain the thermal conductivity accurately and directly. It is suitable for the measurement of a wide temperature range. Its principle is to measure the thermal conductivity by using the heat trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/20G01N25/18
Inventor 冉波王黎明赵伟利郭子学龚江城姜宏民赵君陶丽茹李德鑫
Owner RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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