Liquefied petroleum gas rail tanker safety device - — The thermometer

Must be configured in rail tanker liquefied petroleum gas thermometer and pressure gauge, is in order to measure and control the temperature and pressure of medium tank. Convenient tank filling and escort personnel in the process of filling and transport according to the thermometer table reflects the data to adjust working condition of tank car, to ensure the safe operation of tank car filling and. A thermometer, the structure type of liquefied petroleum gas thermometer for bimetallic thermometer of rail tanker selection. By the thermal element ( Thermal bimetallic strip) , fine axis, dial, Pointers and protecting tubes. The graph is dial the structure of the tube when the vertical plane and protection ( The axial type) When dial plane and protect GuanPing falls ( The radial type) Steering rotational mechanism by pointer. Second, the principle of thermometer bimetallic thermometer is made of round into a spiral heat dual metallic piece as temperature components, heat element in a protection tube, one end fixed ( Fixed end) And the other end, The free end) , directly connected on a thin shaft, shaft end is equipped with a pointer. When temperature changes, the free end of the rotating heat component, driven in a pointer, which indicates that the change in temperature on the dial. Three, the key points of the selection and installation of the thermometer ( 1) The rail tanker liquefied gas safety management regulation requirements liquefied petroleum gas (LPG) must be set in rail tanker has a temperature measuring device. To measure dielectric liquid temperature, the measuring temperature range shall be the one of 40 ℃ 80 ℃ ~ 10. Figure bimetallic thermometer ( 2) To remind the operating personnel and escort personnel attention and vigilance, 40 ℃ and 50 ℃ should be on the dial are coated with red alert. ( 3) The thermal part of thermometer shall be the tank liquid, to measure liquid temperature, and should be able to bear the pressure of hydrostatic test of tank. ( 4) Thermometer should be installed in the easy work, not collision, reduce the vibration. Four, thermometer using considerations ( 1) Thermometer should be kept clean, glass on the dial to be bright and clear, make the dial pointer indicating temperature can clearly visible. ( 2) Newly installed thermometer should be by the department of national metrology accreditation. Use the thermometer should check at least once a year, temperature measurement error should be within the scope of the allowed. After the check should be sealed and fill in check record and calibration certificate, indicating the date of the next check on the dial. ( 3) Tank car management and escort personnel should often to use the thermometer to check, found that check expiration, failure or damage to the thermometer should be replaced immediately, may not continue to use.