Thermocouple thermal resistance connecting head device on a pipe or equipment when some problems that should be pay attention to release time: 2019 - 05 - 31 reading

Thermal resistance connecting head on the piping or equipment device technology should pay attention to some problems, first, the device on the straight pipe; Once again, to make corrosion of thermal resistance and bimetallic thermometer sheath end in the middle of the pipe. Best use flange connection, the attention to join head don't make a mistake. Thermal resistance, thermocouple head deep cohesion to more than 40 mm, best for 43 mm, sealing surface. Bimetallic thermometer head deep cohesion to less than 20 mm, the best is 16 mm, sealing surface. The best and weld on the flange of DN25D cohesion head. Popular recipients of bimetallic thermometer apply pressure pipe nozzle and technology into a 45 ° Angle. Thermal resistance thermocouple exchange in the factory, can be summed up in 2 ~ 3 kinds of standards. Device in a straight pipe and the bend it doesn't matter, the most important is if the device on the straight pipe to pay more attention to in depth, device to media attention to flow direction in turning, heat resistance and bimetallic thermometer cohesion to the flow direction of medium head to inverse the device. At one end of the thermal resistance of the roots join a lead, on the other end to connect two fuses method called three wire system, this method is generally applied with bridge, can eliminate the influence of the lead resistance, good is the most commonly used in industrial process control. On the thermal resistance of the device, should pay attention to is advantageous to the temperature measurement precision, safe and reliable and convenient maintenance, and shall not affect the equipment operation and production operations. To satisfied with the above requirements, the selection of heat resistance of plant site and in depth to pay more attention to the following points in order to make the measurement end of the thermal resistance and plenty of heat exchange between the measured medium, should be reasonable selection of measuring point position, as far as possible to prevent the valve, elbow and pipe and equipment installing heat resistance near the corner of the relevant parameters. In the temperature precision demand high contrast, contrast the sensors. Thermal resistance sensor has large temperature coefficient of resistance, wide linear good, stable performance, using temperature scale, easy processing and other features. Used for measure - Within 200 ℃ ~ + 500 ℃ temperature. Thermal resistance temperature measurement is based on the metal conductor resistance with temperature of add and add this feature for temperature measurement. Thermal resistance are mostly made of pure metal material, is currently the most used platinum and copper, moreover, is now beginning to choose nickel, manganese and rhodium etc manufacturing thermal resistance.