TENSIONING DEVICE FOR WINDING METAL TUBES INTO A COIL

Abstract

A tensioning device for winding metal pipes into a coil contains an upper replaceable roller and two lower replaceable rollers mounted with the possibility of rotation. The upper roller is mounted with the possibility of vertical movement. The device is equipped with a caliper with the possibility of longitudinal movement, a housing mounted on the caliper with the possibility of rotation around the axis and fixation. The housing contains a control unit for longitudinal movement of the caliper depending on the angular movement of the spindle shaft at a given step of winding metal pipes. The upper and lower rollers are mounted in conical bearings in the housing and are made multi-pass with a distance L between the centers of the passes, which sets the winding density of the coil. The upper roller is installed with the possibility of vertical movement by means of sliders and adjusting screws.

Claims

1. A tensioning device for winding metal pipes into a coil, comprising an upper replaceable roller and two lower replaceable rollers mounted with the possibility of rotation, wherein the upper roller is mounted with the possibility of vertical movement, characterized in that it is equipped with a caliper made with the possibility of longitudinal movement, a housing mounted on the caliper with the possibility of rotation around the axis and fixation, and a control unit mounted in the housing for longitudinal movement of the caliper depending on the angular movement of the spindle shaft at a given step of winding metal pipes, wherein the upper and lower rollers are mounted in conical bearings in the housing and are made multi-pass with a distance L between the centers of the passes, which sets the winding density of the coil, and the upper roller is installed with the possibility of vertical movement by means of sliders and adjusting screws.

2. The device according to claim 1, characterized in that the distance between the centers of the roller grooves is determined by the formula $L=D+T,$ where D is the outer diameter of the wound pipe, T is the gap between the pipes.

3. The device according to claim 1, characterized in that it is made with the possibility of simultaneous winding of metal tubes, the maximum number of which is eight.

Description

LIST OF FIGURES, DRAWINGS AND OTHER MATERIALS

[0017] The invention is clarified with drawings.

[0018] FIG. 1, 3 show rolls with rollers.

[0019] FIG. 2 is an end view of this device.

[0020] The tensioning device for winding metal pipes into a coil consists of a caliper 1 (FIG. 1) in the bracket of which on the axis 2 (FIG. 3), necessary for lifting the tensioning device when installing pipe, a housing 3 (FIG. 1) is fixed with multi-pass removable rollers 5, 6 (FIG. 1) mounted in it on conical bearings 4 (FIG. 2). The axes of the lower rollers are fixed permanently, the axis of the upper roller 6 is mounted in sliders 7, which, with the help of screws 8, have the ability to move vertically.

DETAILS CONFIRMING THE FEASIBILITY OF EMBODIMENT OF THE INVENTION

[0021] The tensioning device for winding metal pipes into a coil operates as follows. When the upper roller is displaced towards the lower rollers, the pipe jams in the roller grooves (microbending), the pipe advancement force increases, i.e. the pipe tension required to produce a tightly coiled heat exchanger is created. The control unit (not shown in the drawings) is mounted in the caliper housing and is designed to automate the process of winding tubes of coiled heat exchangers and implements the principle of coordinated control of the longitudinal movement of the device caliper depending on the angular movement of the spindle shaft at a given step of winding. The control is carried out by an industrial controller that reads information from the spindle shaft speed sensor. The received information is sent to the control rectifier that maintains the optimum rotation speed of the caliper motor.

[0022] The tensioning device for winding metal pipes into a coil allows to expand the technological capabilities of the device and wind heat exchangers with a diameter of up to 2800 mm

[0023] Thus, the present device allows to obtain close-packed bundles of pipes with different diameters and thicknesses and significantly increase the winding performance by 1.8-2 times.