概述：铠装热电偶具有能弯曲，耐高压，热响应时间快和坚固耐用等许多优点，它与可拆卸式热电偶一样作为测量温度的变送器，通常和显示仪表，记录仪表和电子调节器配套使用，同时，亦可以作为可拆卸式热电偶的感温元件。 I. Overview of WRK series armored thermocouples : Armored thermocouples have many advantages such as bending, high voltage resistance, fast thermal response time, and ruggedness. They are the same as detachable thermocouples as temperature transmitters. Display instruments, recording instruments and electronic regulators are used together. At the same time, they can also be used as temperature sensing elements for detachable thermocouples. It can directly measure the liquid, steam and gas valence and the temperature of solid surface in the range of 0 ～ 800 ℃ in various production processes.
2. Working principle and basic structure of WRK series armored thermocouples: The working principles and basic characteristics of armored thermocouples are the same as ordinary thermocouples. The structural principle of the armored thermocouple is made of a conductor and a high-insulation magnesium oxide jacket 1Cr18Ni9Ti stainless steel protective tube, which is drawn in one piece multiple times. Armored thermocouple is mainly composed of junction box, terminal block and armored thermocouple core, and is equipped with various fixing devices. There are three types of armored thermocouples: open-end, insulated, and shell-type: 1. the structural form of the armored thermocouple material 2. the structural form of the measuring end (hot end) 3. the type of fixed device and the fixed type of armored thermocouple : Fixed card type, movable card type, fixed flange type, and movable flange type. Card sleeve threaded joints: Note: The specifications in the brackets are generally not used. If special specifications are required, they can be ordered. In order to meet the needs of different industries for the welding structure and size of the fixed flange, users can make special orders according to the actual situation. Note: Yu specifications are generally not used. For special orders only. 4. Armored thermocouple junction box forms: Armored junction boxes are currently available in simple, waterproof, handle, small junction box, plug-in, and compensating wire types.
主要技术参数：1.测量范围和允差注:(1) |t|为被测温度的绝对值(2)分度号为T的产品需要与公司协商订货2.铠装热电偶热响应时间、铠装热电偶热响应时间不大于下表的规定:3.绝缘电阻、当周围空气湿度为15～35℃,相对湿度不大于80%时,绝缘型铠装热电偶的偶丝与外套管之间的绝缘电阻值应符合下表的规定:4.可挠度、铠装热电偶的可挠曲率半径不小于其外径的5倍。 Third, WRK series armored thermocouple main technical parameters: 1. Measurement range and tolerances Note: (1) | t | is the absolute value of the measured temperature (2) the index number of T products need to negotiate with the company to order 2 The thermal response time of the armored thermocouple and the thermal response time of the armored thermocouple are not greater than the following table: 3. Insulation resistance, when the ambient air humidity is 15 ～ 35 ℃ and the relative humidity is not more than 80%, the insulation armored The insulation resistance value between the thermocouple's wire and the outer tube should meet the requirements of the following table: 4. Flexibility, the radius of flexibility of the armored thermocouple should not be less than 5 times its outer diameter.
The difference between armored thermocouples and assembled thermocouples
1. Armored thermocouples have many advantages such as bending, high pressure resistance, fast thermal response time, and ruggedness. They are the same as industrial assembled thermocouples. As a transmitter for measuring temperature, they are usually used as display instruments, recording instruments and The electronic regulator is used together, and it can also be used as a temperature sensing element for assembled thermocouples. It can directly measure the temperature of liquid, steam and gas media and solid surfaces in the range of 0 ~ 800 ℃ during the production process.
2. Armored thermocouples have the advantages of bending, high voltage resistance, fast thermal response time, and durability. Armored thermocouples are the same as fabricated thermocouples. As temperature sensors, they are usually armored thermocouples and display instruments, records The instrument and the electronic regulator are used together. At the same time, the armored thermocouple can also be used as the temperature sensing element of the assembled thermocouple. Armored thermocouples can directly measure the temperature of liquid, steam and gaseous media and solid surfaces in the range of 0 ℃ ～ 1100 ℃ in various production processes.
The working principle of armored thermocouples is that two ends of conductors of two different components are welded to form a loop. The direct temperature measurement end is called the working end, and the terminal end is called the cold end, also called the reference end. When there is a temperature difference between the working end and the reference end, a thermal current will be generated in the circuit. Connect the display instrument, and the instrument will indicate the corresponding temperature value of the thermoelectromotive force generated by the thermocouple. The thermoelectromotive force of the armored thermocouple will increase as the temperature of the measurement terminal increases. The size of the thermoelectromotive force is only related to the material of the thermocouple conductor and the temperature difference between the two ends, and has nothing to do with the length and diameter of the thermocouple.
产品主要由接线盒、接线端子和铠装热电偶组成基本结构，并配以各种安装固定装置组成。 Armored thermocouple products are mainly composed of junction boxes, terminal blocks and armored thermocouples, and are equipped with various mounting fixtures. There are two types of armored thermocouples: insulated and shell-type.