A start-up protection system for pipe end bevel cutting equipment

Abstract

The invention discloses a starting protection system of pipeline end face groove cutting equipment. The system comprises an oil tank, expansion shoe lifting valves, a cartridg valve, a rotary large-disc hydraulic motor, motor oil inlet paths, expansion cylinder lifting oil cylinders which are used for controlling the expansion shoe to extend out, a left hydraulic valve and a right hydraulic valvewhich are located at the lower ends of two protective devices of the left protective device and the right protective device correspondingly; an expansion shoe oil inlet path of the expansion shoe lifting oil cylinders is connected with the expansion shoe oil lifting valves, an expansion shoe oil outlet path of the expansion shoe lifting oil cylinders is connected with the expansion shoe oil lifting valves, an control oil inlet path of the cartridg valve communicates with the expansion shoe oil inlet path which is located between the expansion shoe lifting oil cylinders and the expansion shoe lifting valves, and the left hydraulic valve and the right hydraulic valve are arranged on the control oil inlet path of the cartridge valve in series; and the motor oil inlet paths are correspondinglycommunicate with an oil inlet of the cartridge valve and an oil inlet of the rotary large-disc hydraulic motor. According to the system, the machining safety of the end surface groove of the pipelinecan be greatly improved.

Description

technical field [0001] The invention relates to the technical field of pipe end bevel processing, in particular to a start-up protection system for pipe end bevel cutting equipment. Background technique [0002] With the improvement of the country's requirements for the welding quality of long-distance pipelines, the increase in the strength grade of pipeline steel, and the substantial increase in labor costs, more and more full-position automatic long-distance pipeline welding has been used. Long-distance pipelines need to realize automatic welding. The first step is to solve the problem of standard process bevel processing of the two end faces of long-distance pipelines. However, none of the pipe end bevel equipment on the market has the protection function of rotating the large plate to start the rotation, that is, the worker does not extend the expansion shoe to fix it. steel pipe, and the left and right protective devices can also be started to rotate without putting do...

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Problems solved by technology

[0002] With the improvement of the country's requirements for the welding quality of long-distance pipelines, the increase in the strength grade of pipeline steel, and the substantial increase in labor costs, more and more full-position automatic long-distance pipeline welding has been used. Long-distance pipelines need to realize automatic welding. The first step is to solve the problem of standard process bevel processing of the two end faces of long-distance pipelines. However, none of the pipe end bevel equipment on the market has the protection function of rotating the large plate to start the rotation, that is, the worker does not extend the expansion shoe to fix it. Steel pipe, and the rotating large plate can be started to rotate without putting down the left and right protective devices, which is prone to safety accidents

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