SU414071A1 - - Google Patents

Description

one

The inner centralizer is designed for the assembly and automatic welding of tubular billets into sections.

Internal centralizers for assembling pipes for welding are known that contain expanding elements that are hinged through a system of levers with movable and fixed faceplates, and the nodes of hinge mounting of levers on the movable faceplate are located at the same distance from its axis.

The proposed device differs from the known ones in that the attachment points are located on the movable faceplate by the Rusas and their number in the Rus is directly proportional to the distance from the axis of the faceplate, which ensures the assembly of pipes with a wide range of diameters, maintaining a constant distance between the expanding elements in the place of their contact with the product.

FIG. 1 shows a constructive scheme of the proposed centralizer; in fig. 2 is a section along A-A in FIG. one.

The inner centralizer consists of two identical, connected by the rod 1, mechanisms, each of which includes a fixed faceplate 2 rigidly fixed on the rod 1 and a movable faceplate 3 mounted on the rod 1 with the possibility of limiting movement. A fixed hydraulic cylinder 4 is attached to the fixed faceplate .2, the rod 5 of which is connected to the mobile faceplate 3. The mobile and fixed faceplates have nests 6, located around the circumference of the faceplates as Rus 7, 8. Number of nests 6

In rusah 7, 8, the more, the larger the radius of the rus. Detachable three-hinged levers 9, fastened with a threaded faceplate 10, are inserted into the sockets 6. On the middle hinge 11 of the levers 9, expansion elements 12, for example rollers, are installed.

The device works as follows. Using the rod 1, the device is installed inside the pipes to be welded, so that the joint is located between the expanding rollers 12

two mechanisms. The hydraulic cylinders 4 are turned on, the movable faceplate 2 moves along the rod 1, and the three-hinged levers 9 with the rollers 12 unclench the pipes and ensure the alignment of the edges of the pipes for welding.

When centering pipes of smaller diameters, the levers are inserted into the jacks of Russ 8, while the number of levers 9 with rollers 12 unclenching the tube is equal to the number of slots 6 in this tub.

When centering pipes of large diameter to maintain an optimal distance between the rollers 12 around the perimeter of the pipe, the three-hinged levers 9 are relocated to Rus 7, in which a greater number of

sockets 6, 3 Subject of the invention an internal centralizer for assembling pipes for welding, comprising expanding elements pivotally connected through a system of levers c5 of a movable and fixed faceplate, characterized in that, in order to increase ff; 4 of the quality of assembly and expansion of the range of pipes assembled for welding by locating the hinge assemblies of the levers on the movable faceplate, the number of attachment points of the levers in rus is directly proportional to their distance from the axis of the faceplate. Uh

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