PIPE CENTERING DEVICE Russian patent published in 2023 - IPC F16L1/10 F16L55/18 

FIELD: pipelines.

SUBSTANCE: repair of main pipelines used when replacing a defective section of a pipeline. The device for centering pipes includes clamps of two fastened halves, equipped with locking devices at the ends. The clamps are connected by a power set of stringers with the ability to move relative to each other with subsequent fixation. The clamps at the ends, covering the removed section of pipes on both sides, are made in pairs. The clamps in a pair are located at a distance from each other, which prevents distortion of the pipes after removing a section of the pipe. Each half of the clamps is equipped with a replaceable internal corresponding die that interacts with the surface of the pipe and is made in the form of a semi-ring. Half of the clamp is equipped with at least two radial threaded holes, and from the inside - an annular recess for the outer annular protrusion of the die. The inner diameter of the die is 1-2% larger than the outer diameter of the pipe, the outer diameter is 1-2% less than the inner diameter of the clamp, and the diameter of the die protrusion is 1-2% less than the diameter of the annular sample of the clamp. The protrusion of the die is inserted into the annular recess of the corresponding half of the clamp with the possibility of movement and fixation limited by the semi-ring and the inner surface of this half by adjusting screws installed in the radial threaded holes of the corresponding half of the clamp. The device allows to cover not strictly cylindrical and/or slightly curved pipes due to the limited mobility of the dies inside the clamp. Replaceable dies allow to adjust the clamps for different pipe sizes.

EFFECT: reliability of fixing the ends of pipes without a significant increase in metal consumption is ensured through the use of paired dies, spaced apart from each other in pairs at a distance that prevents distortion of the pipes.

2 cl, 6 dwg