Temperature detection device for high-temperature and high-pressure environment and preparation method of device

Abstract

The invention discloses a temperature detection device for a high-temperature and high-pressure environment. The detection environment of the temperature detection device is as follows: the temperature is not higher than 800 DEG C, and the pressure is not higher than 30MPa; the temperature detection device comprises a temperature sensor and a sleeve; the sleeve comprises a sleeve body and a combination part which is arranged on the peripheral surface of the sleeve body and seals the opening of a container; the sleeve body comprises a first end far away from a tested high-temperature and high-pressure environment and a second end extending into the tested high-temperature and high-pressure environment; the detection end, extending into the high-temperature and high-pressure environment, ofthe temperature sensor is exposed out of the sleeve body, and the compensation end of the temperature sensor penetrates through the sleeve body and then is exposed out of the sleeve body; and a filling layer for sealing a gap between the temperature sensor and the sleeve body fills a position between the part, positioned in the sleeve body, of the temperature sensor and the sleeve body. The response speed and strength of the temperature detection device are improved.

Description

technical field [0001] The invention relates to the field of temperature monitoring, in particular to a sealing method and device for detecting the temperature in a high-temperature and high-pressure environment. Background technique [0002] In modern industrial production, temperature measurement is used in almost all aspects of the production process, and temperature measurement in high-temperature and high-pressure environments is also widely used. For example, the temperature measurement of the pressure vessel of the nuclear power plant, the maximum ambient temperature is 350°C, and the pressure is 18MPa, but most of them are non-contact temperature measurement, that is, the pressure vessel is welded with a pressure measuring conduit, and then the temperature sensor is inserted into the conduit to measure the pressure inside the pressure vessel. temperature. The temperature sensor of this measurement method does not need to bear pressure and does not require sealing. H...

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Problems solved by technology

[0004] Although the above-mentioned installation structure forms a seal at the junction of the sealing clamp X and the temperature sensor 11, since the sealing structure is formed by the sealing clamp X pressing the temperature sensor 11, it will damage the outer shell of the temperature sensor 11 to a certain extent. , for the temperature sensor 11 with a small outer diameter (for example, the outer diameter is only 1.0~2.0), the metal casing of the temperature sensor 11 is very thin (the wall thickness is about 0.1~0.3mm), and the temperature and pressure are low (the temperature is lower than 400 ° C, It is feasible when the pressure is less than 18MPa), but it cannot be used when the temperature reaches 800°C and the pressure reaches 30MPa.

In addition, this kind of sealing method is more unreliable under high flow rate environmental conditions. For example, when the temperature of the fluid (fluid is oil) in pressure vessel A is as high as 800°C, the strength of the metal material drops sharply. If the temperature sensor 1 is used In the above-mentioned direct mechanical seal method, the sealing surface is easily broken due to the stress concentration caused by the scouring of high-speed fluid, and serious leakage accidents occur

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