JP2009174998A - Apparatus for thermomechanical analysis for wet atmospheres - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid dew condensation causing failure and degradation of apparatus bodies and attachment devices and measure stably and accurately mechanical behavior to temperature and humidity of samples. <P>SOLUTION: The apparatus for thermomechanical analysis for wet atmosphere 10 communicates the mechanical behavior of a sample 15 set within a heat-retention chamber 20 into which a wet gas is introduced to an outside measurement device 50 by a probe rod 35 engaged and inserted freely and movably within a support tube 30, in which a curtain gas supply means 56 is equipped that supplies a curtain gas to prevent dew condensation in the support tube 30 and a shielding plate 60 is provided that lies between the sample 15 in the heat-retention chamber 20 and an evacuation port 22 and introduces the flow of the curtain gas to the evacuation port 22. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a thermomechanical analyzer for a humidity atmosphere used for grasping the characteristics of a substance with respect to temperature and humidity.

  In paper, film, fiber, and other various materials and substances, mechanical behavior such as expansion / contraction with respect to temperature and humidity is often emphasized. In order to grasp this behavior, a thermomechanical analyzer for a humidity atmosphere has been conventionally provided in which a substance is placed in an environment of a predetermined temperature and humidity, and the mechanical behavior of the substance in that environment is measured. (For example, Patent Document 1).

  This thermomechanical analyzer includes a heat insulation chamber having an air supply port and an exhaust port for circulating an atmospheric gas adjusted to a predetermined temperature and humidity, and one end of the cylinder positioned in the heat insulation chamber. And a support tube having a sample support at the end of the tube, and a probe rod that is loosely inserted into the support tube to transmit and transmit the mechanical behavior of the sample to the outside. Is done.

  The probe rod is connected to a measuring device installed outside the support tube. The measuring device includes a differential transformer, a balance mechanism, and the like, and measures the mechanical behavior (characteristic) of the sample via a probe rod. By measuring the mechanical behavior of the probe rod while circulating an atmospheric gas having a predetermined temperature and humidity in the heat insulation chamber, it is possible to grasp the characteristics of the sample with respect to the temperature and humidity.

  In order to perform the analysis with the above-described apparatus with high accuracy, it is necessary to set the temperature and humidity in the heat insulation chamber with high accuracy. For this reason, the humidity generator which can set temperature and humidity with high precision is provided.

JP-A-8-145918

  In the above-described apparatus, humidity gas is introduced into the heat insulation chamber as an atmospheric gas for measurement. In order to transmit and transmit the mechanical behavior of the sample to the external measuring device with the probe rod, the probe rod is loosely inserted and communicated with the outside through the support tube.

  For this reason, a part of the humidity gas introduced into the chamber passes through the support tube to the outside. At this time, the humidity gas condenses on the way. This dew condensation causes degradation and failure of the analyzer main body and the measuring device which is an accessory device.

  Therefore, the present inventor studied supplying curtain gas (dry gas) for preventing condensation in the support tube. By supplying the curtain gas, it is possible to prevent the humidity gas from flowing into the support tube, and it is possible to avoid the occurrence of condensation in the apparatus main body and the accessory apparatus.

However, it has been found that the above-described dew evasion measures cause the following problems. That is, the dried curtain gas flows into the heat insulation chamber, disturbs the temperature and humidity conditions of the ambient gas around the sample, and is a major obstacle to measuring the mechanical behavior of the sample with respect to the temperature and humidity stably and with high accuracy. It has been found.

  The present invention solves the above-mentioned problems, and its purpose is to loosely insert the mechanical behavior of a sample installed in a heat insulation chamber into which humidity gas is introduced into a support tube. In a thermo-mechanical analyzer for humidity atmosphere that is transmitted to an external measuring device using a probe and rod, it is possible to avoid dew condensation that causes deterioration and failure of the main unit and attached devices, and the temperature and humidity of the sample. It is intended to make it possible to measure the mechanical behavior with respect to the surface stably and with high accuracy.

  Other objects and configurations of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  As means for solving the above problems, the present invention provides the following means.

(1) A heat insulation chamber having an air supply port and an exhaust port for circulating an atmospheric gas adjusted to a predetermined temperature and humidity, a cylinder end portion located in the heat insulation chamber, and its cylinder end portion A thermo-mechanical analyzer for a humidity atmosphere, comprising: a support tube provided with a sample support base; and a probe rod movably inserted into the support tube to transmit the mechanical behavior of the sample to the outside. There,
A curtain gas supply means for supplying curtain gas for preventing condensation in the support pipe is provided, and a shielding plate is provided between the sample and the exhaust port to guide the flow of the curtain gas to the exhaust port. A thermomechanical analyzer for a humidity atmosphere characterized by that.

  (2) In the means (1), the support base is attached to a cylindrical end of the support tube via a support column, and the shielding plate is fixed to the support column. apparatus.

  (3) A thermomechanical analyzer for a humidity atmosphere, characterized in that in the means (1) or (2), a heat retaining means for keeping the support tube at a temperature equal to or higher than the temperature in the heat retaining chamber is provided.

  (4) In any one of the means (1) to (3), the heat retaining chamber is formed inside a constant temperature jacket through which a heat medium having a predetermined temperature circulates, and an air supply pipe leading to the air supply port is formed at the constant temperature. A thermomechanical analyzer for a humidity atmosphere characterized in that the temperature is made constant by passing through a jacket.

  Thermomechanical analysis for humidity atmosphere in which the mechanical behavior of a sample installed in a heat insulation chamber into which humidity gas is introduced is transmitted to an external measurement device by a probe rod that is movably inserted into a support tube. In the apparatus, it is possible to avoid condensation that causes deterioration and failure of the apparatus main body and the accessory apparatus, and it is possible to measure the mechanical behavior of the sample with respect to temperature and humidity stably and with high accuracy.

  Other operations / effects of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  FIG. 1 shows an embodiment of a thermomechanical analyzer for a humidity atmosphere according to the present invention. FIG. 2 shows an enlarged view of the main part of the present invention.

  The main part of the thermomechanical analyzer 10 for humidity atmosphere shown in the figure is constituted by a heat retaining chamber 20, a sample support 25, a support tube 30, a probe rod 35, and the like.

  The heat retaining chamber 20 includes an air supply port 21 and an exhaust port 22 for circulating an atmospheric gas adjusted to a predetermined temperature and humidity. The air supply port 21 is connected to an atmospheric gas generator 52 through an air supply pipe 23.

  The atmospheric gas generator 52 generates atmospheric gas adjusted to a predetermined temperature and humidity and introduces it into the heat retaining chamber 20. The introduced atmospheric gas circulates in the heat insulation chamber 20 and is discharged from the exhaust port 22. Thereby, the atmospheric condition in the heat insulation chamber 20 is set and maintained at a predetermined temperature and humidity.

  The support tube 30 is a straight tube having both ends open, and one end of the tube is positioned in the heat retaining chamber 20, and a support base 25 for a sample (sample to be analyzed) 15 is installed at the end of the tube. Yes. The sample support base 25 is attached to the tube end of the support tube 30 via a support column (four).

  The probe rod 35 is for transmitting and transmitting the mechanical behavior of the sample 15 to the external measuring device 50, and is loosely inserted into the support tube 30 so as to be movable. One end thereof is connected to the sample of the support base 25, and the other end is connected to the measuring device 50. The measurement device 50 includes, for example, a differential transformer, a balance mechanism, and the like, and measures the mechanical behavior of the sample 15 via the probe rod 35.

  Moreover, in the said apparatus 10, the heat retention chamber 20 is formed inside the constant temperature jacket 42 through which the heat medium of predetermined temperature circulates. At the same time, the air supply pipe 23 and the exhaust pipe 24 communicating with the air supply port 21 and the exhaust port 22 of the heat retaining chamber 20 are also passed through the constant temperature jacket 42 and are made constant temperature.

  The constant temperature jacket 42 keeps the inside of the heat insulation chamber 20 at a predetermined temperature. The support tube 30 is also formed inside a constant temperature jacket 43 through which a heat medium having a predetermined temperature circulates, and is maintained at the predetermined temperature.

  The heat medium of the constant temperature jackets 42 and 43 is supplied from a constant temperature water supply device 54. Constant temperature water, which is a heat medium, is supplied from the constant temperature water supply device 54. This constant temperature water circulates through the constant temperature jacket 43 of the support tube 30, then circulates through the constant temperature jacket 42 of the heat insulation chamber 20, and finally. It is returned to the constant temperature water supply device 54 and reused.

  Furthermore, the apparatus 10 includes a curtain gas supply device 56 that supplies a dry gas for preventing condensation to the support tube 30. In addition, a shielding plate 60 is installed between the sample 15 and the exhaust port 22 to guide the flow of the curtain gas to the exhaust port 22.

  The shielding plate 60 has a disk shape slightly smaller than the inner diameter of the heat retaining chamber 20 and is fixed to the support column 26 of the support base 25 at a position close to the cylindrical end of the support tube 30. That is, it is installed in a state of covering the upper side of the support base 25. A through hole is formed in the center of the shielding plate 60 to allow the probe rod 35 to pass therethrough so as not to interfere with the operation of the probe rod 35.

In the apparatus 10, the behavior of the sample 15 in the heat retaining chamber 20 with respect to the temperature and humidity can be grasped by the external measuring device 50 through the probe rod 35. At this time, the humidity gas introduced into the heat retaining chamber 20 passes through the gap between the shielding plate 60 and the heat retaining chamber 20 and is discharged from the exhaust port 22.

  On the other hand, moisture gas is prevented from entering the support tube 30 by supplying curtain gas. Thereby, the dew condensation which causes deterioration and failure of the device is prevented. At this time, a part of the curtain gas tends to flow into the heat insulation chamber 20, but is prevented from flowing directly into the chamber 20 by the shielding plate 60, and the flow is guided to the exhaust port 22 to be in the chamber 20. It is discharged together with the atmospheric gas. Therefore, the temperature and humidity conditions of the ambient gas around the sample 15 can be maintained in a predetermined stable state without being disturbed by the curtain gas.

  Accordingly, it is possible to avoid dew condensation that causes deterioration and failure of the main body of the apparatus 10 and the attached apparatus, and it is possible to measure the mechanical behavior of the sample 15 with respect to the temperature and humidity stably and with high accuracy.

  In the above embodiment, the support base 25 of the sample 15 is attached to the cylindrical end of the support tube 30 via the support column 26, and the shielding plate 60 is fixed to the support column 26. Thus, the shielding plate 60 is attached to the curtain. It is possible to install the gas in the optimum position for suppressing disturbance and instability of the atmospheric conditions in the chamber 20 due to gas.

  The support tube 30 is formed inside the constant temperature jacket 43, so that the support tube 30 is kept at the same temperature or higher as in the heat insulation chamber 20. Thereby, the dew condensation in the support tube 30 can be prevented more reliably.

  The heat retaining chamber 20 is formed inside the constant temperature jacket 42, and an air supply pipe 23 communicating with the air supply port 21 is passed through the constant temperature jacket 42 so as to be constant temperature. Thus, the temperature and humidity conditions of the atmospheric gas introduced into the chamber 20 can be stabilized with high accuracy by a very easy method without requiring any special temperature adjustment or mechanism in the heat retaining chamber 20. . That is, the mechanical behavior of the sample 15 with respect to the temperature and humidity can be measured more stably and accurately while simplifying the configuration and operation of the apparatus 10.

  As mentioned above, although this invention was demonstrated based on the typical Example, this invention can have various aspects other than having mentioned above. For example, the constant temperature control of the heat retaining chamber 20 and the support tube 30 can be performed by electrothermal temperature adjustment.

  Thermomechanical analysis for humidity atmosphere in which the mechanical behavior of a sample installed in a heat insulation chamber into which humidity gas is introduced is transmitted to an external measuring device by a probe rod that is movably inserted into a support tube. In the apparatus, it is possible to avoid condensation that causes deterioration and failure of the apparatus main body and the accessory apparatus, and it is possible to measure the mechanical behavior of the sample with respect to temperature and humidity stably and with high accuracy.

It is sectional drawing which shows one Embodiment of the thermomechanical analyzer for humidity atmosphere by this invention. It is sectional drawing which expands and shows the principal part of FIG.

Explanation of symbols

10 Thermomechanical analyzer for humidity atmosphere 15 Sample (sample to be analyzed)
DESCRIPTION OF SYMBOLS 20 Thermal insulation chamber 21 Air supply port 22 Exhaust port 23 Air supply pipe 24 Exhaust pipe 25 Sample support stand 26 Support | pillar 30 Support pipe 35 Probe rod 42 Constant temperature jacket 43 Constant temperature jacket 50 External measuring device 52 Atmospheric gas generator 54 Constant temperature water supply device 56 Curtain gas supply device 60 Shield plate

Claims (4)

A heat insulation chamber having an air supply port and an exhaust port for circulating an atmospheric gas adjusted to a predetermined temperature and humidity inside, a cylinder end portion located in the heat insulation chamber, and a sample at the cylinder end portion A thermomechanical analyzer for a humidity atmosphere comprising a support tube provided with a support base, and a probe rod that is movably inserted into the support tube and transmits the mechanical behavior of the sample to the outside,
A curtain gas supply means for supplying curtain gas for preventing condensation in the support pipe is provided, and a shielding plate is provided between the sample and the exhaust port to guide the flow of the curtain gas to the exhaust port. A thermomechanical analyzer for a humidity atmosphere characterized by that.   2. The thermomechanical analyzer for a humidity atmosphere according to claim 1, wherein the support base is attached to a cylindrical end of the support tube via a support column, and the shielding plate is fixed to the support column.   The thermomechanical analyzer for a humidity atmosphere according to claim 1 or 2, further comprising a heat retaining means for keeping the support tube at a temperature equal to or higher than the temperature in the heat retaining chamber.   The heat insulation chamber according to any one of claims 1 to 3, wherein the heat insulation chamber is formed inside a constant temperature jacket through which a heat medium having a predetermined temperature circulates, and a supply pipe communicating with the supply port is passed through the constant temperature jacket. A thermo-mechanical analyzer for a humidity atmosphere, characterized in that

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