Novel temperature thermocouple for turboset

Abstract

The invention discloses a novel temperature thermocouple for a turboset, and the thermocouple comprises a temperature measurement mechanism which comprises a protection tube, an armored thermocouple wire with one end disposed in the protection tube, and sealing members disposed on the armored thermocouple wire at intervals; the fixing mechanism comprises a hollow fixing box with an upward opening, a sealing block arranged at the opening of the upper end of the hollow fixing box, a hollow pipe communicating with the middles of the two sides of the hollow fixing box, an expansion assembly matched with the hollow pipe, an extrusion assembly matched with the expansion assembly, and a containing box arranged outside the expansion assembly and the extrusion assembly in a sleeving mode. One end of the sheathed thermocouple wire and the sealing element are arranged in the hollow fixed box; the stability and the sealing performance of the temperature measuring mechanism in the using process are further improved through an expansion assembly and an extrusion assembly in the fixing mechanism.

Description

technical field [0001] The invention relates to the technical field of thermal power generation, in particular to a novel temperature measuring thermocouple for steam turbine units. Background technique [0002] Thermal power generation generally refers to the general term for the use of thermal energy generated when fuels such as coal, oil and natural gas are burned to heat water, turn the water into high-temperature, high-pressure steam, and then use the steam to drive a generator to generate electricity. The power plant is mainly coal-fired, and the temperature difference between the upper and lower cylinders of the steam turbine is one of the important indicators of unit control. Accurately monitoring and measuring the cylinder temperature and controlling the cylinder temperature difference within the allowable range are of great significance to ensure the safety of the unit. For the measurement of the temperature of the medium pressure cylinder, the imported thermocoupl...

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Problems solved by technology

[0002] Thermal power generation generally refers to the general term for using the heat generated by the combustion of fuels such as coal, oil, and natural gas to heat water, turning the water into high-temperature, high-pressure steam, and then using the steam to drive a generator to generate electricity. Power plants are mainly coal-fired, and the temperature difference between the upper and lower cylinders of the steam turbine is one of the important indicators for unit control. Accurately monitoring and measuring the cylinder temperature and controlling the cylinder temperature difference within the allowable range are of great significance to ensure the safety of the unit. The measurement of the temperature of the medium pressure cylinder has been using imported thermocouple elements. The thermocouple temperature elements have the following disadvantages in use. First, the lead-out wires of the thermocouples in the imported thermocouple elements are soldered to the terminals in the protective sleeve by soldering. Long-term use is easy to remove tin and cause the measurement circuit to be disconnected, resulting in bad points in the cylinder temperature display. Secondly, the thermocouple element is led out of the inner cylinder of the steam turbine and sealed with a clamp. After installation, the clamp is easily stuck in the base, and the maintenance can only be cut off again Due to the above shortcomings, the safe and stable operation of the steam turbine unit has been greatly affected. Therefore, we have proposed a new type of temperature measuring thermocouple for the steam turbine unit.

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