Anti-corrosion temperature sensor

A temperature sensor and corrosion-resistant technology, used in thermometers, thermometer parts, instruments, etc., can solve the problems of protecting the shell from rusting, polluting the test environment, complex structure, etc., to reduce heat loss and corrosion resistance. good thermal insulation performance

Inactive Publication Date: 2015-11-11
WUHAN UNIV OF TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Since the temperature measurement environment is an acid and alkali environment, the temperature sensor is corroded in an acid and alkali environment, and the protective shell will rust and pollute the test environment. At the same time, the replacement of the protective shell becomes more frequent, which is not conducive to long-term temperature observation
The traditional protective shell is stainless steel, but in some extreme environments, stainless steel will quickly rust and need to be replaced, which is very inconvenient to use; the structure is complex and the design is unreasonable

Method used

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with specific examples and accompanying drawings.

[0016] A corrosion resistant temperature sensor such as figure 1 As shown, it includes a body 1 and a plug 4 that are connected to each other. The body 1 is composed of a protective shell 3 and a thermistor 2. The thermistor 2 is located in the protective shell 3 and leads out the plug 4 through a wire 5. protective casing such as figure 2 As shown, it includes a stainless steel layer 7, a graphite layer 8, an active metal layer 9 and a thermally conductive insulating material layer 10 from outside to inside, wherein the active metal refers to a metal that is more active than stainless steel.

[0017] Preferably, the plug is a PPR plug, which has good heat insulation performance and small heat absorption, which can reduce heat loss during heat transfer.

[0018] Preferably, the thermally conductive insulating material layer is thermally conductive ...

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Abstract

The invention provides an anti-corrosion temperature sensor, including a body and a plug which are mutually connected. The body is composed of a protection shell and a thermistor. The thermistor is positioned in the protection shell, and the plug is led out through a lead. The protection shell comprises a stainless steel layer, a graphite layer, an active metal layer and a heat-conducting insulation material layer from outside to inside, wherein the active metal layer refers to metal which is more active than stainless steel. With the adoption of the protection shell structure, the active metal layer is enabled to have a chemical or electrochemical reaction first as electrons of the stainless steel layer are conducted to a magnesium thin sheet layer due to corrosion, thereby reducing the corrosion resistance of the stainless steel layer, and meanwhile, the oxidized active metal layer cannot affect the thermal conductivity of the whole temperature sensor. The invention is simple and reasonable in structure.

Description

technical field [0001] The invention relates to a temperature sensor, in particular to a corrosion-resistant temperature sensor. Background technique [0002] A temperature sensor is a sensor that senses temperature and converts it into a usable output signal. The temperature sensor is the core part of the temperature measuring instrument, and there are many varieties. According to the measurement method, it can be divided into two categories: contact type and non-contact type. According to the characteristics of sensor materials and electronic components, it can be divided into two types: thermal resistance and thermocouple. [0003] At present, ordinary liquid temperature sensors are packaged in stainless steel or copper, with a plug-type shape, which is characterized by easy installation and strong corrosion resistance. Ordinary liquid temperature sensors are packaged with metal materials, and the isolation level from the outer surface of the package to the thermal eleme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K1/10G01K1/18G01K7/22
Inventor 徐小强刘欣宇
Owner WUHAN UNIV OF TECH
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