The installation of radial type bimetallic thermometer

Radial type bimetal thermometer, it is a kind of appropriate measurement field detection instrument of high temperature, can be used to directly measure the liquefaction, the temperature of the gas. Type of radial bimetallic thermometer device, should watch out its temperature measurement accuracy, insurance and maintenance convenience, and shall not affect the equipment operation to yield control. More than satisfied with the request of radial type of the installation of the bimetallic thermometer should be paid attention to the following aspects: 1, the radial type bimetal thermometer, with maintenance casing thermal resistance of heat transfer and heat loss, in order to increase the measurement deviation, thermocouple and thermal resistance should have sufficient draw depth. ( 1) The temperature of the core fluid thermal resistance, the individual should pull out the measurement end to the tube core ( Vertical device or tilted device) 。 As the current body of pipe diameter is 200 mm, the thermal resistance should draw depth choice 100 mm. ( 2) For low temperature high pressure and high velocity of temperature measurement, Such as main steam temperature) , in order to reduce maintenance set for fluid resistance and avoid maintenance set in the fluid under the influence of fracture can be used to maintain tube shallow plugging method or thermal resistance of thermal sleeve type. Shallow inserted type thermal resistance of casing maintenance, the pull out the depth of the main steam pipe shall be not less than 75 mm; The scale of the shell hot resistance pull out a depth of 100 mm. ( 3) If need to measure is the temperature of flue gas, flue 4 m diameter, and heat resistance pull out the depth of 1 m. ( 4) Radial type bimetallic thermometer when measuring original draw depth beyond 1 m, should as far as possible the vertical device, casing or add support frame with maintenance. 2, in order to make the measurement end of the thermal resistance and plenty of heat exchange between measured medium, measuring point position, should be reasonable choices just prevent the valve, elbow and pipe with the death of equipment Angle of adjacent furnish heat resistance.