KR-20260066544-A - Angle Adjustable Heat Shield for Thermocouple

Abstract

The present invention relates to an angle-adjustable heat shield for a temperature sensor capable of shielding and protecting a temperature sensor that measures convective or leaking heat from a gas turbine of a power plant. The feature of the present invention includes a shielding part (100) that shields a temperature sensor (20) installed in a gas turbine casing and measures temperature, and a fixing part (200) that fixes the shielding part (100) in a shielding state.

Inventors

• 길세진
• 유흥수
• 김경래
• 김경훈

Assignees

• 한국중부발전(주)

Dates

Publication Date

20260512

Application Date

20241104

Claims (4)

1. A shielding part (100) that shields a temperature sensor (20) installed in a gas turbine casing to measure temperature and surrounds it. An angle-adjustable heat shield for a temperature sensor, characterized by including a fixing part (200) that fixes the wrapping state of the shielding part (100).
2. In claim 1, One end of the shielding part (100) is formed convexly in an arc shape and the other end is formed concavely in an arc shape, so that when rolled up, one side overlaps the other side to form a cone shape. An angle-adjustable heat shield for a temperature sensor, characterized in that the measuring part (21) of the temperature sensor (20) penetrates when the part formed concavely in an arc shape is rolled up to form a circle.
3. In claim 2, The shielding part (100) has an elongated hole (110) formed on one side for fixing the fixing part (200), and a through hole (120) formed on the other side for fixing the fixing part (200) while communicating with the elongated hole (110). An angle-adjustable heat shield plate for a temperature sensor, characterized in that the fixing part (200) includes a bolt that penetrates the elongated hole (110) and the through hole (120) of the shielding part (100) and a nut that is coupled to the bolt.
4. In claim 1, The shielding portion (100) includes a support portion (130) formed on both sides and supported by the measuring portion (21) of the temperature sensor (20). The support member (130) A fixing piece (131) fixed to a shielding part (100), and A support piece (132) supported on the measuring part (21) of the temperature sensor (20) and An angle-adjustable heat shield for a temperature sensor, characterized by including an elastic piece (133) that connects a support (132) to a fixed piece (131).

Description

Angle Adjustable Heat Shield for Thermocouple The present invention relates to an angle-adjustable heat shield for a temperature sensor capable of shielding and protecting a temperature sensor that measures convective or leaking heat from a gas turbine of a power plant. Generally, gas turbine power plants are structured to generate electricity by burning natural gas. In this process, the supply of natural gas is controlled by measuring the temperature of the exhaust gas generated after combustion in the gas turbine; if the exhaust gas temperature is higher than the reference temperature, the supply of natural gas is reduced, and if the exhaust gas temperature is lower than the reference temperature, the supply of natural gas is increased. However, there is a problem in that the temperature sensor is mounted in a well or flange formed in the gas turbine casing, and even after insulation, hot air comes into direct contact with the temperature sensor head due to convective heat or heat leakage from the casing, causing errors in temperature sensing or damage to wires. In addition, temperature sensors directly attached to the gas turbine body face the problem of a persistent risk of tripping due to temperature rise caused by high-temperature degradation and in remote areas. The background technology of the present invention is 'Gas turbine exhaust gas temperature sensor device', registered as Patent Publication No. 10-0868525 of the Korean Intellectual Property Office on October 22, 2012. A conventional gas turbine exhaust gas temperature sensor device measures the temperature of the gas turbine exhaust gas by installing a temperature sensor in a casing surrounded by insulation material and then using the temperature sensor. However, there is a problem in that the temperature sensor is directly exposed to high temperatures. Therefore, there is a need to develop a device that can protect the temperature sensor to prevent errors in temperature sensing and prevent damage to the temperature sensor. FIG. 1 is a drawing showing an angle-adjustable heat shield plate for a temperature sensor unfolded according to an embodiment of the present invention. FIG. 2 is a perspective view showing the shielding plate of the present invention rolled into a cone shape. FIGS. 3(a) and 3(b) are drawings showing the shielding plate of the present invention in a state where it is rolled narrowly or widely. FIG. 4 is a diagram showing the state in which the present invention shields a temperature sensor. FIG. 5 is a drawing showing another embodiment of the present invention. FIG. 6 is a drawing showing another embodiment of the present invention. Hereinafter, the present invention will be examined in detail with reference to the attached drawings. The present invention is susceptible to various modifications and may take various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the invention to the specific disclosed forms, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. Similar reference numerals have been used for similar components in the description of each drawing. In the accompanying drawings, the dimensions of structures are depicted enlarged or reduced to the actual size to ensure clarity of the invention or to allow for a schematic understanding of the configuration. As illustrated in FIGS. 1 to 4, it includes a shielding part (100) that shields a temperature sensor (20) installed in a gas turbine casing to measure temperature, and a fixing part (200) that fixes the shielding part (100) in a shielding state. First, the temperature sensor (20) includes a measuring part (21) that detects temperature, a sensor head (22) that converts the temperature detected by the measuring part (21) into information, and a connecting part (23) that connects the measuring part (21) to the sensor head (22). The measuring part (21) is formed in a pin shape that is smaller in diameter and longer than the sensor head (22) to measure temperature. The connecting part (23) is formed in a hexagonal nut shape that is larger in diameter than the measuring part (21) so that the end of the shielding part (100) is caught and supported. These temperature sensors (20) measure heat convected or leaked from the gas turbine of the power plant. The shielding part (100) is composed of a metal plate having high heat resistance, corrosion resistance, chemical resistance, and elasticity, and has an insulating material formed on its surface. Therefore, the worker can easily roll the shielding part (100) into a cone shape by hand, and can also protect the temperature sensor (20) for a long period of time once installed. One end of the shielding part (100) is formed convexly in an arc shape, and the other end is formed concavely in an arc shape. When this shielding part