Device for measuring heat insulation effect

Abstract

The utility model belongs to the field of heat insulation detection, and particularly relates to a device for measuring a heat insulation effect. Comprising a gas source, a gas heating device and a tubular furnace which are sequentially connected through a pipeline, the output end of the tubular furnace is connected with the external environment, and a multifunctional recorder is further arranged in an inner cavity of the tubular furnace; a temperature measurer, a temperature controller and a first thermocouple are arranged in the gas heating device, the output end of the gas source is connected with the input end of the temperature controller, and the output end of the temperature controller is connected with the input end of the tubular furnace; the output end of the first thermocouple is connected with the temperature measurer, and the measuring end is located in the temperature controller; by heating the gas, the temperature difference between the inner and outer surfaces of the tubular sample can be ensured, and the tubular sample is prevented from being damaged due to temperature difference caused by overlarge temperature difference between the inner and outer surfaces. By arranging a fourth thermocouple and a fifth thermocouple, it is determined that the temperature of the input gas is more stable.

Description

Technical Field

[0001] The utility model belongs to the field of heat insulation detection, and particularly relates to a device for measuring heat insulation effect. Background Art

[0002] At present, when measuring the performance of a thermal barrier coating, the common measurement method is to open a hole in the furnace door of a muffle furnace, face the side coated with the thermal barrier coating towards the furnace chamber of the muffle furnace, weld a thermocouple on the back and place it in the air, heat up the muffle furnace, and measure the temperature difference between the back and the muffle furnace to obtain the performance of the thermal barrier coating.

[0003] However, this measurement method for heat insulation effect is relatively rough, and when measuring the temperature difference between the back and the muffle furnace, the measurement result is inaccurate and the measurement process is dangerous. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above-mentioned disadvantages of the prior art and provide a device for measuring heat insulation effect.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a device for measuring heat insulation effect, which includes a gas source, a gas heating device, and a tubular furnace connected in sequence through a pipeline. The output end of the tubular furnace is placed in the external environment, and the inner cavity of the tubular furnace is connected to the input end of a multi-functional recorder;

[0007] A temperature controller and a first thermocouple for measuring the gas temperature in the temperature controller are arranged in the gas heating device. The output end of the gas source is connected to the input end of the temperature controller, and the output end of the temperature controller is connected to the input end of the tubular furnace; the measuring end of the first thermocouple is placed in the temperature controller, and the output end of the first thermocouple is connected to a temperature measuring device;

[0008] A fourth thermocouple and a fifth thermocouple are arranged in the tubular furnace. The measuring end of the fourth thermocouple measures the inner surface temperature of the tubular specimen, and the measuring end of the fifth thermocouple measures the outer surface temperature of the tubular specimen. The output ends of the fourth thermocouple and the fifth thermocouple are both connected to the multi-functional recorder; the heat insulation effect of the thermal barrier coating coated on the outer surface of the tubular specimen is detected by taking the difference between the inner surface temperature and the outer surface temperature.

[0009] Furthermore, blind holes are opened on the thermal barrier coating coated on the outer surface of the tubular specimen, and the temperature in the blind holes measured by the measuring end of the fifth thermocouple is used as the outer surface temperature of the tubular specimen, where: the depth of the blind holes is less than the thickness of the thermal barrier coating.

[0010] Further, a second thermocouple is also provided inside the gas heating device. The output end of the second thermocouple is connected to a temperature measuring device, and the measuring end of the second thermocouple is located at the output end of the temperature controller.

[0011] Further, a third thermocouple is also provided inside the tubular furnace. The measuring end of the third thermocouple is located at the input end of the tubular furnace, and the output end of the third thermocouple is connected to a temperature measuring device.

[0012] Further, a flow meter for detecting the flow rate of the gas is provided between the temperature controller and the tubular furnace.

[0013] Further, a pressure valve is provided on the gas source.

[0014] Further, the gas source contains an inert gas.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] 1. Since the first thermocouple, the second thermocouple and the third thermocouple are used to accurately measure the temperature of the gas entering the tubular furnace, it can ensure that the temperature of the gas in the tubular furnace is always at the set temperature, guarantee stable heating, make there be a temperature difference between the inner and outer surfaces of the tubular specimen, and ensure that the temperature difference between the inner and outer surfaces will not be too large to cause damage to the tubular specimen due to the temperature difference.

[0017] 2. The present utility model obtains the test results of the accurate heat insulation effect by setting the temperature detected by the fourth thermocouple and measuring the temperatures of the inner and outer surfaces of the tubular specimen by the fifth thermocouple.

[0018] 3. By setting the first thermocouple to measure the temperature of the gas in the temperature controller, it is further convenient to control the gas for heating or cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings here are incorporated into the specification and form a part of this specification, and are used together with the specification to explain the principle of the present utility model.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these accompanying drawings.

[0021] Figure 1 It is a structural block diagram of the present utility model.

[0022] Description of the reference numerals: 1 is the gas source; 2 is the gas heating device; 3 is the tubular furnace; 4 is the multi-functional recorder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Here, exemplary embodiments will be described in detail. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present utility model. On the contrary, they are merely examples of devices consistent with some aspects of the present utility model detailed in the appended claims.

[0024] Embodiment

[0025] A device for measuring the heat insulation effect, comprising a gas source 1, a gas heating device 2, and a tube furnace 3 connected in sequence through a pipeline. The output end of the tube furnace 3 is placed in the external environment, and the inner cavity of the tube furnace 3 is connected to the input end of a multi-functional recorder 4;

[0026] A temperature controller and a first thermocouple for measuring the gas temperature in the temperature controller are provided in the gas heating device 2. The output end of the gas source 1 is connected to the input end of the temperature controller, and the output end of the temperature controller is connected to the input end of the tube furnace 3; the measuring end of the first thermocouple is placed in the temperature controller;

[0027] A fourth thermocouple and a fifth thermocouple are provided in the tube furnace 3. The measuring end of the fourth thermocouple measures the inner surface temperature of the tubular specimen, and the measuring end of the fifth thermocouple measures the outer surface temperature of the tubular specimen; the heat insulation effect of the thermal barrier coating coated on the outer surface of the tubular specimen is detected by taking the difference between the inner surface temperature and the outer surface temperature.

[0028] A temperature measuring device is also provided in the gas heating device 2. The output end of the first thermocouple is connected to the temperature measuring device, and the output ends of the fourth thermocouple and the fifth thermocouple are both connected to the multi-functional recorder 4.

[0029] When it is necessary to detect the heat insulation effect of the thermal barrier coating coated on the surface of the tubular specimen, blind holes need to be prepared on the surface of the tubular specimen first. These blind holes do not penetrate the thermal barrier coating. Then, the tubular specimen is placed in the tube furnace 3. At this time, the measuring end of the fourth thermocouple is in contact with the inner surface of the tubular specimen, and the output end is connected to the multi-functional recorder 4 for measuring the inner surface temperature of the tubular specimen; the measuring end of the fifth thermocouple is located in the blind hole on the surface of the tubular specimen to make the measurement of the outer surface temperature of the tubular specimen more accurate. The output end is connected to the multi-functional recorder 4 for measuring the outer surface temperature of the tubular specimen. Then, subtracting the measured inner surface temperature of the tubular specimen from the outer surface temperature of the tubular specimen can obtain the heat insulation effect of the specimen coated with the thermal barrier coating (the tubular specimen is generally made of alloy material and has no heat insulation effect).

[0030] The gas released by the gas source 1 enters the tube furnace 3 after being heated by the gas heating device 2. At the same time, the furnace temperature control cabinet raises the temperature of the furnace chamber of the tube furnace 3.

[0031] Further, a second thermocouple is also provided in the gas heating device 2. The output end of the second thermocouple is connected to the temperature measuring device, and the measuring end of the second thermocouple is located at the output end of the gas temperature controller. The second thermocouple is used to detect the temperature of the gas output by the temperature controller.

[0032] Further, a third thermocouple is also provided in the tubular furnace 3. The measuring end of the third thermocouple is located at the inlet of the tubular furnace 3. The output end of the third thermocouple is connected to the temperature measuring device. The third thermocouple is used to measure whether the temperature of the gas entering the tubular furnace 3 meets the requirements.

[0033] Further, a flow meter for detecting the flow rate of the gas is provided between the temperature controller and the tubular furnace 3.

[0034] In addition, the gas heating device 2 ensures that the gas heating temperature is below 1300 °C.

[0035] Further, a pressure valve is provided on the gas source 1. The pressure valve is used to control the pressure of the gas released from the gas source 1.

[0036] Further, the gas source 1 contains an inert gas. The gas source 1 is a tank filled with an inert gas. Preferably, the gas is argon.

[0037] The using process of the present utility model: First, turn on the multi-functional recorder 4 and the gas heating device 2, then turn on the gas source 1 to heat the gas, turn on the tubular furnace 3, use the first thermocouple to measure the temperature of the gas in the temperature controller, so as to more conveniently control the heating or cooling of the gas, use the second thermocouple to detect the temperature of the gas output by the temperature controller, use the third thermocouple to measure whether the temperature of the gas entering the tubular furnace 3 meets the requirements, use the temperature detected by the fourth thermocouple and the fifth thermocouple to measure the temperatures of the inner surface and the outer surface of the tubular specimen. Taking the difference between the temperatures of the inner surface and the outer surface of the tubular specimen can detect the heat insulation performance of the tubular specimen.

[0038] The above are only the specific embodiments of the present utility model, enabling those skilled in the art to understand or implement the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model.

[0039] It should be understood that the present utility model is not limited to the above-described content and can be variously modified and changed without departing from its scope. The scope of the present utility model is only limited by the appended claims.

Claims

1. A device for measuring thermal insulation effect, characterized in that: It comprises a gas source (1), a gas heating device (2), and a tubular furnace (3) which are sequentially connected via a pipeline, wherein the output end of the tubular furnace (3) is placed in an external environment, and the inner cavity of the tubular furnace (3) is connected to the input end of a multifunctional recorder (4); The gas heating device (2) is provided with a temperature controller, a temperature measuring device and a first thermocouple for measuring the temperature of the gas in the temperature controller; the output end of the gas source (1) is connected to the input end of the temperature controller, and the output end of the temperature controller is connected to the input end of the tube furnace (3); the measuring end of the first thermocouple is placed in the temperature controller, and the output end of the first thermocouple is connected to the temperature measuring device; A fourth thermocouple and a fifth thermocouple are arranged in the tubular furnace (3); the measuring end of the fourth thermocouple measures the inner surface temperature of the tubular sample, and the measuring end of the fifth thermocouple measures the outer surface temperature of the tubular sample; the output ends of the fourth thermocouple and the fifth thermocouple are both connected to a multifunctional recorder (4); the heat insulation effect of the thermal barrier coating coated on the outer surface of the tubular sample is detected by taking the difference between the inner surface temperature and the outer surface temperature.

2. A device for measuring thermal insulation effect according to claim 1, characterized in that: A blind hole is provided on the thermal barrier coating coated on the outer surface of the tubular sample, and the temperature in the blind hole measured by the measuring end of the fifth thermocouple is used as the outer surface temperature of the tubular sample.

3. The device for measuring thermal insulation effect according to claim 1, characterized in that: A second thermocouple is also provided in the gas heating device (2), the output end of the second thermocouple is connected to the temperature measuring device, and the measuring end of the second thermocouple is located at the output end of the temperature controller.

4. The device for measuring thermal insulation effect according to claim 1, characterized in that: A third thermocouple is also arranged in the tubular furnace (3), the measuring end of the third thermocouple is located at the input end of the tubular furnace (3), and the output end of the third thermocouple is connected to a temperature measuring device.

5. The device for measuring thermal insulation effect according to claim 1, characterized in that: A flow meter for detecting the flow rate of the gas is arranged between the temperature controller and the tubular furnace (3).

6. The device for measuring thermal insulation effect according to claim 1, characterized in that: The gas source (1) is provided with a pressure valve.

7. The device for measuring thermal insulation effect according to claim 1, characterized in that: The gas source (1) contains inert gas.

Images