High-temperature-resistance oxygen sensor device

Abstract

The invention relates to a high-temperature-resistance oxygen sensor device. The high-temperature-resistance oxygen sensor device comprises an oxygen sensor, a heat-insulating insulating pipe and a protective sealing cylinder; one end of the oxygen sensor is connected with one end of the heat-insulating insulating pipe, and the protective sealing cylinder is arranged on the outer side of the heat-insulating insulating pipe in a sleeving mode; the oxygen sensor is a detecting main body, one end of the oxygen sensor is connected with a plurality of cables, a plurality of through holes are formedin the heat-insulating insulating pipe in the length direction of the heat-insulating insulating pipe, and the multiple cables penetrate through the multiple through holes in a one-to-one correspondence mode; and the space between the protective sealing cylinder and the heat-insulating insulating pipe is filled with a heat-insulating material, one end of the protective sealing cylinder is connected with the oxygen sensor, and sealing is formed by the other end of the protective sealing cylinder and the heat-insulating insulating pipe through a plugging plate. According to the high-temperature-resistance oxygen sensor device, the working life of a common oxygen sensor is effectively prolonged, the operation damage rate of the high-temperature-resistance oxygen sensor device in the high temperature environment is decreased, and normal transmission of a measuring signal value is ensured.

Description

technical field [0001] The invention relates to the technical field of measuring devices, in particular to a high temperature resistant oxygen sensing device. Background technique [0002] The working principle of the oxygen sensor is similar to that of a battery, and the zirconia element in the sensor acts like an electrolyte. Its basic working principle is: under certain conditions (high temperature and platinum catalysis), the difference in oxygen concentration between the inside and outside of platinum oxide is used to generate a potential difference, and the greater the concentration difference, the greater the potential difference. The oxygen content in the atmosphere is 21%. The exhaust gas after the rich mixture combustion actually does not contain oxygen. The exhaust gas generated after the lean mixture combustion or the exhaust gas produced by lack of fire contains more oxygen, but it is still higher than the oxygen in the atmosphere. Much less. Under the high te...

AI Technical Summary

Problems solved by technology

When the ordinary oxygen sensor is used in an environment higher than 200°C, long-term high-temperature corrosion will damage the sensor and the tail cable of the sensor, resulting in an increase in the resistance of the line and affecting the measurement accuracy, and even short circuit, open circuit, etc.

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