Protection device of temperature detector

Abstract

The invention discloses a protection device of a temperature detector. The invention belongs to the field of temperature detection in metallurgical industry. The device comprises an outer protection box and an inner protection box, the outer protection box is provided with an inner containing chamber and an outer protection box cooling medium bin. The inner protection box is inserted into the inner containing chamber; the inner protection box is provided with an equipment cabin and an inner protection box cooling medium cabin; and the wire outlet end of the inner protection box is provided with an installation window. The temperature detector is arranged in the equipment cabin from the installation window; the temperature sensor penetrates through the outer protection box from the inner protection box and extends to the outer side of the outer protection box; the outer protection box cooling medium bin and the inner protection box cooling medium bin cool and protect the temperature detector and the cold end of the temperature sensor together, the problem of abnormal thermocouple compensation is avoided, and the reliability of monitoring data is improved. Installation of the temperature sensor is restrained through the restraining frame, the installation firmness degree of the temperature sensor can be improved, and meanwhile disordered installation of the temperature sensor canbe avoided.

Description

technical field [0001] The invention relates to the technical field of temperature detection in the metallurgical industry, and more specifically relates to a protection device for a temperature detector. Background technique [0002] Due to the demand for heating process management in the metallurgical industry, it is necessary to regularly detect the temperature uniformity of the continuous heating furnace. The known method of protecting the temperature detector is to place the temperature detector in the protection device and pass through the furnace with the furnace. During the body process, the temperature detector is protected by the protection device. [0003] For the heating furnace, the materials heated in the furnace are generally in a state of motion. In the process, not only the surface temperature of the materials must be understood, but also the temperature distribution inside the materials must be mastered. As a temperature uniformity detection device, the te...

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Problems solved by technology

In the single protective box structure, the temperature detector is often placed in the semi-open inner cabin of the outer protective box; In the protection box, due to the consideration of the connection requirements between the temperature detector and the temperature sensor, the convenience of sensor wiring and equipment safety are often not compatible

[0007] In the single protective box of the open inner cabin, the outlet area of ​​the temperature detector directly faces the heat insulation fiber filled outside the single protective box, so the pulling and heat insulation material fibers in the temperature sensor installation are broken in the high temperature environment, and the porosity increases. Under the large double impact, the high-temperature furnace gas will invade the inner cabin of the single protection box along the collapsed heat insulation fiber and sensor gap, causing protection failure

[0008] In addition, in the structure with an inner protective box, the convenience of sensor wiring is often not considered enough, and the cold end of the temperature sensor is not well organized, restrained and protected.

When there are many detection sensors, it will lead to difficulties in installing the sensors, and even the situation that the external protective box cannot be fully assembled in place

At the same time, in the installation work before the temperature uniformity test, when the external protective box is moved or the temperature sensor is improperly pulled during the installation process, the installed sensor will be undetected. The position is protruding, which leads to the problem of high temperature furnace gas intrusion in the detection

[0009] In the above two configurations, the common feature is that the temperature sensors are all designed with positive outlets, that is, the wiring interface of the temperature detector faces the outside of the protection box. This structural design results in a short distance for the temperature sensor to penetrate into the equipment compartment

In the above two situations where high-temperature furnace gas will be intruded, when the temperature of the cold end of the equipment compartment exceeds 100°C, it will cause varying degrees of abnormal thermocouple compensation, which will affect the authenticity of the test record data. Cause damage to temperature detector and temperature sensor

[0010] 2. The configuration design of the protection box for the known temperature detector does not have the position of the temperature measurement point inside the cabin and the temperature measurement point of the external protection box, and does not have the function of checking the remaining amount of cooling medium

It is also due to the above-mentioned structural defects that the reliability of the protective box needs to be improved.

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