Installation of electric heating tube detection terminal

Installation of electric heating tube detection terminal

(1) The power supply used for the electric heating tube is a 380V three-phase power supply. To ensure the balance of the usage current of A, B, and C three-phase power supplies, the electric heating tube needs to be installed with the power box detection terminals connected in the order of ABC, BCA, and CAB. The detection terminals can only determine the current of two of the items used, so each electric heating tube needs to be installed with one detection terminal. The average length of a single electric heating tube is 1 pair/10m, so the detection terminals are also 1 pair/10m.

(2) There are a total of 5 connecting wires on the detection terminal. Lines 1 and 5 are connected to the electric heating wires on the electric heating tube, while lines 2, 3, and 4 are connected to the power supply in sequence. After installation, perform joint repair and insulation, and the inspection terminal after joint repair is completely wrapped inside the insulation layer.

2.2 Data Concentrator Installation

(1) Because the data concentrator can only collect information on the operation status of the terminal pipeline under the corresponding transformer, one data concentrator should be installed under each transformer that provides power to the electric heating tube, usually located at the well site.

(2) There are a total of 4 connection lines on the data concentrator, of which 3 lines are respectively connected to the A, B, and C power sources in the temperature control device to detect whether each section of the electric heating tube is running normally; The other line is connected to the temperature sensor in the temperature control device to read the temperature of the pipeline medium.

3. Conclusion

From 2007 to 2010, online automatic detection systems were put into operation in Daqing Oilfield Oil Production Plant 7, Oil Production Plant 9 Aonan, and Hulunbuir. In the electric heating oil collection system, the application of an online automatic detection system facilitates the daily management work of production units and reduces the workload of maintenance. However, the application of this system requires the installation of detection terminals on each single pipe, which increases potential failure points; For detection terminals that are located in humid areas for a long time, they cannot be completely kept dry and are prone to damage, making them unable to function properly.

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