Special explosion-proof electric heater for oil tank of oil field

The utility model relates to a special explosion-proof electric heater for an oil tank in an oil field, which mainly comprises an explosion-proof wiring cavity barrel, a flange, an electric heating tube, a low-temperature sensor, a high-temperature sensor, an electric heating tube sleeve, a high-temperature switch, a low-temperature switch, an alternating-current contactor and the like, and is characterized in that the electric heating tube sleeve is sleeved outside the electric heating tube and is 8300mm long. A support is installed in the explosion-proof wiring cavity cylinder body, and a high-temperature switch, a low-temperature switch and an alternating-current contactor are installed on the support. The low-temperature sensor is connected with the low-temperature switch, and the high-temperature sensor is connected with the high-temperature switch. Through the interaction of the low-temperature switch, the high-temperature switch and the alternating current contactor, the temperature can be automaticall