A cutting device for pipe

Abstract

The invention relates to the technical field of cutting equipment, and discloses a cutting equipment for pipes, including a positioning ring, the edge of the positioning ring is hingedly connected with three sets of adjustment arms that keep rotating synchronously, and the ends of the adjustment arms are connected with A moving wheel that can move both radially and axially, and the adjustment arm is in a maximum open state when it is not squeezed. In this cutting equipment for pipes, the nozzle rotates along the axis of the pipe, and the distance between its end and the pipe wall is always kept constant, so as to ensure that the movement of the nozzle is always adapted to the arc of the pipe during cutting, and the distance between the two is always kept constant. , which can not only ensure the best cutting effect, but also prevent the nozzle from being melted by high temperature. Secondly, the nozzle rotates inside the pipe to cut, and the driving equipment is small, which is more suitable for outdoor cutting. At the same time, cutting from the inside to the outside can be It is easier to observe the cutting spark and adjust the feed speed.

Description

technical field [0001] The invention relates to the technical field of cutting equipment, in particular to a cutting equipment for pipes. Background technique [0002] Large-diameter pipes are usually made of high-strength steel pipes, and the pipes need to be cut during installation, and the long pipes are cut apart for subsequent beveling and welding. Plasma pipe cutting machine is a commonly used cutting equipment, which has the advantages of high cutting efficiency, low loss and wide application range. [0003] Plasma cutting is a processing method that uses the heat of a high-temperature plasma arc to melt (and evaporate) the metal part or part at the incision of the workpiece, and uses the momentum of high-speed plasma to remove the molten metal to form a processing method. During processing, the plasma nozzle and the workpiece are processed. There is an optimal distance between the nozzle and the workpiece. If the distance between the nozzle and the workpiece is too ...

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Problems solved by technology

[0003] Plasma cutting is a processing method that uses the heat of the high-temperature plasma arc to partially or partially melt (and evaporate) the metal at the incision of the workpiece, and uses the momentum of the high-speed plasma to remove the molten metal to form an incision. During processing, the plasma nozzle and the workpiece There is an optimal distance between the nozzle and the workpiece. If the distance between the nozzle and the workpiece is too close, the high temperature generated by the arc and the plasma nozzle will be melted. If the distance is too far, the efficiency will be reduced. Always maintain the optimum distance between the nozzle and the workpiece

[0004] Secondly, when cutting a large pipe, the position of the nozzle is fixed at the same time, and the pipe is rotated to realize the cutting of the pipe. However, on the one hand, the mass and volume of the large pipe are large, resulting in a large device for driving the pipe rotation, which cannot be used in outdoor sites. On the other hand, for pipe cutting, at the same time, the cutting speed is set to ensure the cutting through of the workpiece. In order to ensure the cutting through, the cutting time will be redundant, which reduces the cutting efficiency and energy consumption. For outdoor cutting At the same time, due to the high brightness during plasma cutting, it is not easy to observe whether the cutting is through, and then control the feed speed

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