Adjustable armored thermocouple (resistor) with multipoint leakage resistance

Abstract

The invention belongs to an adjustable armored thermocouple (resistor) with multipoint leakage resistance, comprising a junction box, a protection sleeve and a temperature measuring element; wherein the upper end of the protection sleeve is fixedly arranged on the junction box; the temperature measuring element is coaxially arranged in the protection sleeve, a soft wire of the temperature measuring element is fixedly arranged on the junction box, and the lower end of the temperature measuring element is positioned and arranged through a leakage-resisting seal seat, wherein the lower end of the protection sleeve and the leakage-resisting seal seat are coaxially arranged through an adjustable lock nut, and a compressed leakage-resisting device of the temperature measuring element is arranged on the leakage-resisting seal seat. The invention realizes that the measuring position of the temperature measuring element in the protection sleeve is adjusted at will, is convenient to replace the temperature measuring element and has higher measurement precision and security, better vibration resistance and longer service life.

Description

technical field [0001] The invention belongs to the thermocouple (resistance) in the field of temperature sensors, in particular to a multi-point leak-proof adjustable armored thermocouple (resistance). Background technique [0002] Thermocouple (resistance) is one of the commonly used temperature sensors. At present, multi-point armored thermocouples are commonly used in industrial tank farms to measure the temperature at multiple points of the tank. The thermocouple is mainly composed of a junction box, a protective sleeve and multiple A temperature measuring element consists of three parts. Multiple temperature measuring elements are fixed in the protective casing and connected to the junction box. The protective casing is composed of an upper protective casing and a lower protective casing. The upper end of the upper protective casing is fixed to the junction box. , the outer wall of the lower end is made of external thread and the inner thread of the upper inner wall of...

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Problems solved by technology

[0002] Thermocouple (resistance) is one of the commonly used temperature sensors. At present, multi-point armored thermocouples are commonly used in industrial tank farms to measure the temperature at multiple points of the tank. The thermocouple is mainly composed of a junction box, a protective sleeve and multiple A temperature measuring element consists of three parts. Multiple temperature measuring elements are fixed in the protective casing and connected to the junction box. The protective casing is composed of an upper protective casing and a lower protective casing. The upper end of the upper protective casing is fixed to the junction box. , the outer wall of the lower end is made of external thread and the inner thread of the upper inner wall of the lower protective sleeve is engaged and installed. During field installation, the lower protective sleeve is fixed with the tank to be tested, and then the upper protective sleeve and junction box are installed. This structure exists as follows Problems: 1. When the protective sleeve is damaged due to corrosion or wear, the corrosive medium will directly enter the junction box or enter the external environment, posing a great safety hazard; 2. The temperature measuring element is fixed in the protective sleeve, and its length cannot Adjustment, once the design length does not match the actual length, it cannot be adjusted, resulting in an error between the measured temperature and the actual required station temperature; 3. The armored thermocouple element is assembled as a whole, once damaged, It can only be replaced as a whole, resulting in high repair and maintenance costs; 4. After the junction box is fixedly installed on the upper end of the upper protective sleeve, and then installed with the lower protective sleeve, the final direction of the electrical outlet of the junction box may rotate to an inconvenient on-site installation location, resulting in longer installation time and higher cost

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