Steel tube opening roundness restoring device and using method thereof
A steel pipe and nozzle technology, applied in the field of steel pipe nozzle repair tools, can solve the problems of pipe material waste, low construction efficiency, and excessive nozzle ellipticity, and achieve the effects of expanding application range, improving work efficiency, and improving repair quality
Inactive Publication Date: 2016-04-20
中石化石油工程技术服务有限公司 +1
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Problems solved by technology
[0002] During the manufacturing and transportation of steel pipes, due to external forces and other reasons, the ellipticity of the nozzle exceeds the standard, and the beveling and welding of the nozzle cannot be performed directly.
For steel pipes with such nozzles, the traditional repair method is to cut off the part where the ellipticity of the nozzle exceeds the standard, and then make a bevel. This method causes a certain waste of pipe materials; Use hammers and other tools to repair by knocking. This method affects the next step of groove and welding work to a certain extent, and also affects the roughness and roundness of the nozzle surface.
The above methods will lead to high labor intensity, low construction efficiency and affect the construction quality.
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[0016] The present invention will be described in detail below in conjunction with the accompanying drawings, not to limit the protection scope of the present invention, and all improvements obtained by using the design idea of the present invention belong to the protection scope of the present invention.
[0017] see figure 1 and figure 2 , the rounding device of the steel pipe mouth, including a cylindrical shell 3, the shell flange 6 is welded to the outer periphery of the two ends of the shell 3, and the fixed flange 2 is installed on the two ends of the shell 3, and the fixed flange 2 is connected by the fixed flange bolt 1 is fixed with the shell flange 6, and the oil cylinder 8 is symmetrically arranged at both ends of the inner cavity of the shell 3, and the oil cylinder 8 is installed on the fixed flange 2 through the oil cylinder fixing bolt 7; the piston ends of the two oil cylinders are respectively installed with round wedges 9 Circular wedge 9 is in the shape...
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The invention relates to a steel tube opening roundness restoring device and a using method thereof. The steel tube opening roundness restoring device and the using method thereof are used for repairing a steel tube opening. Shell flanges are welded to the peripheries of the two ends of a shell respectively, fixing flanges are installed at the two ends of the shell, and oil cylinders are symmetrically arranged at the two ends of an inner cavity of the shell and installed on the fixing flanges. Round wedge blocks are installed at the piston ends of the two oil cylinders respectively and are in a circular truncated cone shape. Inclined wedge blocks are in an arrowhead shape, the tails of the inclined wedge blocks penetrate out of radial holes of the shell, and the angle of the two edges of the arrowhead part of each inclined wedge block is equal to the included angle formed by the two round wedge blocks. Due to the fact that the hydraulic tube expansion repair technology is adopted, the labor intensity of workers is relieved, and the working efficiency and repair quality are improved; cushion blocks with different heights can be replaced in the using process, and thus the application range of the steel tube opening roundness restoring device is expanded.
Description
technical field [0001] The invention relates to a tool and a method for repairing a steel pipe mouth, in particular to a steel pipe mouth recirculation device and a use method thereof. Background technique [0002] During the manufacturing and transportation of steel pipes, due to external force and other reasons, the ellipticity of the nozzle exceeds the standard, and the beveling and welding of the nozzle cannot be performed directly. For steel pipes with such nozzles, the traditional repair method is to cut off the part where the ellipticity of the nozzle exceeds the standard, and then make a bevel. This method causes a certain waste of pipe materials; Use hammers and other tools to repair by knocking. This method affects the next step of beveling and welding to a certain extent, and also affects the roughness and roundness of the nozzle surface. The above methods will lead to high labor intensity, low construction efficiency and affect the construction quality. Conten...
Claims
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IPC IPC(8): B21D3/14
CPCB21D3/14
Inventor 耿立国苗升高原杜昊齐金盈魏中格
Owner 中石化石油工程技术服务有限公司