Highpower density immersion electric heating element electric-insulating sealing device

Abstract

The invention discloses a kind of high power density extract electric heating element wire insulation seal device belongs to heating element insulation seal technology. Setting the inner cutting ferrule in the seal cutting ferrule, clamping screw into the cutting ferrule, compressing the inner cutting ferrule, the high-temperature insulation lead cross the inner cutting ferrule , it contacts tightly with the compressed deformation inner cutting ferrule; the cover of the heater seal link with the seal cutting ferrule. The invention uses the assembly structure composed of compress nuts, PTFE inner cutting ferrule and the seal cutting ferrule, it has overcame the shortage that the seal insulation end ages of the resin, it is easy to crack, impact of the insulation seal in present technology, the insulation is good when the device works for a long time in high power density, it achieved the effect that the electrode insulation impedance can be always bigger than 200M after it through the pressure test, pressure cycling test, temperature cycling test, temperature test .

Description

technical field [0001] The invention belongs to the technical field of insulation and sealing of heating elements, and in particular relates to a high-power-density immersion type electric heating element lead-in insulation and sealing device. Background technique [0002] Recently, the electric heating elements manufactured by domestic electric heating element manufacturers usually use resin glue for insulation and sealing at the ends, especially the insulation and sealing structure of the high-power-density liquid-immersion electric heating element and the double-ended lead-in structure are completely immersed in water. And when the pressure and temperature are high, it is difficult to ensure the insulation and sealing performance of the heating element with both ends immersed in water under high temperature and pressure conditions. For example, in an environment where the medium is water, the temperature is 250°C, and the pressure is 5MPa, the working current is about 17A...

AI Technical Summary

Problems solved by technology

[0002] Recently, the electric heating elements manufactured by domestic electric heating element manufacturers usually use resin glue for insulation and sealing at the ends, especially the insulation and sealing structure of the high-power-density liquid-immersion electric heating element and the double-ended lead-in structure are completely immersed in water. And when the pressure and temperature are high, it is difficult to ensure the insulation and sealing performance of the heating element after the two ends of the heating element are immersed in water under high temperature and pressure conditions.

For example, in an environment where the medium is water, the temperature is 250°C, and the pressure is 5MPa, the working current is about 17A, the heating power is 3.8kW, and the heat flux is about 15W / cm 2 After a long period of use, the end of the insulation seal with resin glue is aging and prone to cracks, and the use of resin glue will affect the insulation seal. There is no product that can meet this requirement on the market.

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