Oil pipe internal coating layer point leakage detection device

Abstract

The invention relates to an oil pipe internal coating layer point leakage detection device. The device comprises a sliding rail rack. A pulley is arranged on the sliding rail rack. A detection pipe is fixedly arranged on the pulley. A roller used for supporting the detection pipe is arranged on the sliding rail rack. A support used for placing an oil pipe is arranged in a position, opposite to the detection pipe, of one side of the sliding rail rack. A wiring end connected with the oil pipe is connected with a detection computer. The detection pipe comprises an outer pipe and an inner pipe. The inner pipe is connected with a detection liquid pump. The outer pipe and the inner pipe form a loop space. The loop space is connected with a negative pressure absorption pump. The inner pipe is connected with a through pipe and is connected with a space outside the outer pipe. A detection head is arranged on the outer pipe. Absorbent cotton is arranged at two ends of the detection head. Holes are arranged in positions, opposite to the absorbent cotton, of the outer wall of the outer pipe. The through pipe is arranged corresponding to the detection head. The detection head is connected with a detection line. The detection line is connected with a computer. Coating layer quality is not affected, quality of a coating layer in an oil pipe can be detected time more than once, continuously and repeatedly, the detection precision is high, and the accuracy is high.

Description

technical field [0001] The invention relates to an oil pipe inner coating leakage detection device. Background technique [0002] At present, many oil fields use electric sparks to detect leaks in the inner coating of oil pipes. Because the electric spark detection instrument applies a certain pulse voltage to the surface of various conductive substrate anti-corrosion coatings, the generation of electric sparks will affect the quality of the coating, especially when the coating is relatively thin, breakdown will occur. [0003] For the problems referred to above, the patent No.: 201310330200.9, the title of invention is: oil pipe inner coating leak detection device and detection method, a new solution is provided. The scheme acts like a resistance detector, sensitive to the resistance of the inner coating and water injection pinholes. If a pinhole is encountered, the water in the conductive sponge will seep into the pinhole, the current will be turned on, and the alarm sig...

AI Technical Summary

Problems solved by technology

However, the water content of the conductive sponge in this technical solution is limited, and it is also related to the water absorption performance of the conductive sponge. During use, water cannot be applied to the inner wall of the oil pipe, resulting in missed inspections.

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