Need to pay attention to the somebody else all say winter protection level gauge, pressure transmitter is in the winter also need protection? Answer, of course, need, no matter what instrumentation equipment, such as high temperature and high pressure in low temperature low pressure under some special conditions, generally need to pay attention to protect the key element is damaged, so what kind of things do in winter can protect the pressure transmitter, make its normal operation to achieve good measurement effect? Please see the following notice:
Low winter temperatures, prone to freezing phenomenon, first of all, the pressure transmitter shell or periphery may freeze the screen frozen bad; Second, if the temperature is too low to a certain degree, the pressure fluid may freeze in the mouth, once the ice volume will cause damage, inflation will squeeze the sensor effect measurement,
So how to prevent frostbite?
General instrument commonly used antifreezing measures is heating, steam heating or electric heating, if have winter low temperature factors working conditions on site, so should be considered when selecting the supplementary insulation device box,
1, what is a steam heating
Is binding pipeline, bubbled into steam or heat insulation effect, therefore, if take the steam thermal insulation pipe, so before the heat preservation, need to check the steam or heat pipe was clear, in the winter to heat preservation, basic it is open 24 hours a day, and the temperature of the steam or heat is set according to the environmental temperature,
2, what is a thermal device box
Is a body, wrapped in pressure transmitter, mainly insulation element is heater, heat preservation device will install a socket on the side of the box, convenient power on, but there need to add a temperature controller, when the casing temperature rise to set the temperature range, the temperature controller to control power off; When the temperature drops to a value, to control the power supply continues to heat up, connect
In general, the electric heating tube heater materials can be divided into the brass, carbon steel pipe, stainless steel pipe, generally used stainless steel pipe, some places need explosion-proof heater,
3, type of insulation measures: electric heating cable
Is cable winding contact instrument housing, when when the power is on, the electric energy can be converted into heat energy, then through contact, heat transfer to the instrument housing, thereby to heat up, or the heating cables attached to the meter box inside, can also,
Helpful hints: antifreezing measures above, if there is human's permission, you need to hold people daily insist on insulation device or the condition of the thermal insulation material, if there is any breakage, leakage, or blocking need timely repair or replacement, lest cause a greater loss, if you don't have the manpower, material resources, can install sound and light alarm, such as some gas detection alarming device, if the insulation failure, equipment damage cause gas leakage or liquid leakage, can detect the overweight and alarm parameters, can also play the role of timely alarm and immediately repaired or replaced, loss reduction,