JPH0656738U - Gas temperature measuring device - Google Patents

Abstract

(57) [Abstract] [Purpose] To ensure the strength of the gas temperature measurement point where the thermocouple is incorporated and to improve the accuracy of the thermocouple measurement data. A gas temperature of a structure in which a gas passage 6 is provided so as to penetrate through a ceramic cylindrical jacket 1 extending long in the vertical axis direction, the inlet of the gas passage 6 is widened, and the outlet is relatively narrowed. In a gas temperature measuring device in which a thermocouple 4 is incorporated at a measuring point, a temperature measuring jacket 2 is provided integrally with and crosses the tubular jacket 1, and a gas passage 3 is provided in the temperature measuring jacket 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of a gas temperature measuring device.

[0002]

[Prior art]

 Conventionally, there is an apparatus shown in FIG. 7 for measuring a high gas temperature.

A portion for measuring a high temperature gas is provided with a gas passage 6 penetrating the jacket 1, an inlet 6a of which is relatively widened, and an outlet 6b of which is relatively narrowed. The thermocouple 4b is incorporated in such a portion and the temperature of the gas G flowing as indicated by the arrow is measured.

The jacket 1 that divides the gas passage 6 is usually made of stainless steel. However, when the gas temperature exceeds 1000 ° C., the thermocouple 4 causes a cooling fluid to flow to the temperature sensing section or a temperature measurement. The use of platinum or a platinum alloy for the part contributes to the thermal effect of high-temperature gas.

[0005]

[Problems to be solved by the device]

 However, when the cooling fluid is flown through the temperature sensing part to measure the gas temperature, the data has a large variation in accuracy, and when platinum or platinum alloy is used in the temperature sensing part, the cost becomes high. have.

By the way, recently, when measuring a gas temperature using a thermocouple, we have seen the publication of a technique intended to improve the accuracy and cost of the thermocouple by using a ceramic material at the measurement site ( Actual public Sho 63-6658).

According to this technique, when a thermocouple is incorporated in the measurement site made of ceramics, the thermocouple is supported by a support base to support the thermal stress and tensile stress generated in the thermocouple, and also the turbulent flow of gas. It also tries to resist the vibration problem caused by the above.

However, since the measurement port made of ceramics is provided, there is some concern about the strength of the measurement site, and the size of the measurement port complicates the gas flow, resulting in highly accurate data. There is a problem that you can not hope. In view of the above point, the present invention aims to publicize a gas temperature measuring device that enhances the strength of a measurement site and obtains highly accurate data.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a gas passage through a ceramic-made cylindrical jacket extending long in the vertical axis direction, expands the inlet of this gas passage, and makes the outlet relatively open. In a gas temperature measuring device that incorporates a thermocouple at a gas temperature measuring location with a narrow opening, a ceramic temperature measuring jacket is provided integrally with and crosses the ceramic cylindrical jacket. It is characterized in that the temperature measuring jacket is provided with a gas passage.

[0010]

[Action]

 According to the above configuration, the gas whose temperature is measured by the thermocouple incorporated in the ceramic temperature measuring jacket is discharged through the gas passage without passing through the ceramic temperature measuring jacket after passing through this. However, this gas passage is opened as a plurality of small holes in the ceramic temperature measuring jacket.

Therefore, since the gas passage is a small hole, there is no need to worry about the strength assurance of the ceramic temperature measuring jacket, and the gas flow does not stagnate, so that the measurement accuracy of the thermocouple is improved.

[0012]

【Example】

 An embodiment of the gas temperature measuring device according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic vertical cross-sectional view of a gas temperature measuring device according to the present invention, in which a cylindrical outer jacket 1 made of ceramic extends long in the vertical axis direction. A temperature measuring jacket 2 made of ceramics is integrally formed with the cylindrical jacket 1 and extends transversely. The thermocouple 4 has an inverted L-shape and is made of a ceramic cylindrical jacket. 1. It is installed over the temperature measuring jacket 2. The temperature measuring jacket 2 has a gas passage 3 which is opened as a plurality of small holes as shown in FIG. In such a configuration, the gas G flows into the temperature measuring jacket 2, the temperature of the gas is measured by the thermocouple 4, and the measured gas G is discharged through the gas passage 3.

As described above, since the gas G is discharged from the gas passage 3 through the thermocouple 4 incorporated in the temperature measuring jacket 2, the gas G smoothly flows without stagnation in the temperature measuring jacket 2. Flowing. Therefore, the thermocouple 4 is not thermally affected by the stagnation of the gas G, and the measurement accuracy is further improved. Further, as can be seen in FIG. 2, the gas passage 3 is a small hole for the opening degree of the temperature-measuring envelope 2. Therefore, even if this material is a ceramic, there is no fear of a decrease in strength.

3 and 4 show a cross section of the tubular jacket 1. Whether the tubular jacket 1 is circular or elliptical, the thermocouple 4 has an inverted L-shape. As a result, the location of each of them is close to the wall surface and is from the center point as shown in the figure. For this reason, the thermocouple 4 is affected by the thermal effect of the gas, deviates from the initial position of the head, and the reliability of the measurement data remains unsatisfactory.

FIG. 5 is based on such a problem. The support part 5 is provided in the thermocouple 4 incorporated in the tubular jacket 1, and the support part 5 allows the support part 5 to be seen in FIG. Since the thermocouple 4 is held at the initial position, the accuracy of the measurement data of the thermocouple 4 can be improved.

[0017]

[Effect of device]

 As described above, in the gas temperature measuring device according to the present invention, the temperature measuring jacket is provided across the tubular jacket incorporating the thermocouple, and the gas measuring port is provided in the temperature measuring jacket. Therefore, the gas flow becomes smooth and the accuracy of the measurement data becomes higher. Further, the gas passage has a small hole in comparison with the diameter of the temperature measuring jacket, and therefore has an advantage that the strength of the ceramic does not decrease.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing an example of a gas temperature measuring device according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG.

FIG. 4 is a cross-sectional view of a tubular jacket.

FIG. 5 is a schematic vertical sectional view showing another embodiment of the gas temperature measuring device according to the present invention.

6 is a sectional view taken along the line CC of FIG.

FIG. 7 is a schematic view showing a conventional embodiment.

[Explanation of symbols]

 1 Cylindrical jacket 2 Temperature measuring jacket 3 Gas port 4 Thermocouple 6 Gas passage

Claims (1)

[Scope of utility model registration request] 1. A gas temperature measurement having a structure in which a gas passage is provided through a cylindrical cylindrical outer jacket extending in the vertical axis direction, the inlet of the gas passage is widened, and the outlet is relatively narrowed. In a gas temperature measuring device incorporating a thermocouple at a location, a ceramic temperature measuring jacket is provided integrally with and crosses the ceramic cylindrical jacket, and a gas inlet is provided in the ceramic temperature measuring jacket. A gas temperature measuring device characterized by being provided.