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Pipe jacking machine unit

A pipe jacking machine and unit technology, applied in the field of machinery, can solve problems such as inability to automatically adjust online, achieve the effect of increasing production flexibility and improving dimensional accuracy

Active Publication Date: 2013-05-01
CISDI ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the existing pipe jacking machine, the pass pattern of the roller mold is set in advance, the outer diameter and wall thickness of the hollow pipe produced are fixed, and cannot be automatically adjusted online

Method used

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  • Pipe jacking machine unit
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  • Pipe jacking machine unit

Examples

Experimental program
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Effect test

Embodiment Construction

[0020] The present invention will be further described below with reference to the drawings and embodiments.

[0021] A pipe jacking unit includes a pipe jacking machine, a top bed 7 and a fixed roller die 8 installed on the top bed 7. The unit also includes a hollow pipe 6 and a mandrel 5 used to treat the fixed roller die 8 The adjustable roll mold 9 assembly for reprocessing. The adjustable roll mold assembly 9 is located behind the fixed roll mold 8. The adjustable roll mold assembly 9 includes a large base 12, three balancing hydraulic cylinders 18, and three pressing hydraulic cylinders 13 , A small frame 15 and three adjustable roll bearing seat assembly 14, three balancing hydraulic cylinders 18 are installed on the large base 12, each depressing hydraulic cylinder 13 is installed on a corresponding balancing hydraulic cylinder 18, Three adjustable roll bearing seat assemblies 14 are installed on the small frame 15, and the small frame 15 is set on the large base 12. Each...

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PUM

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Abstract

The invention provides a pipe jacking machine unit, belongs to the technical field of machinery, and particularly relates to a pipe jacking machine. A plurality of adjustable roll dies on an outlet of the pipe jacking machine are provided with a hydraulic automatic pressing device, and the hole type and the size can be automatically adjusted on line. Compared with the prior art, the pipe jacking machine has the advantages that the hole type and the size of each adjustable roll die can be automatically adjusted on line, and the outer diameter and the wall thickness of a produced hollow pipe can be changed; the production flexibility is high; and according to the on-line feedback and adjustment of the size error of the hollow pipe on the outlet, the size precision of the outer diameter and the wall thickness of the hollow pipe is improved.

Description

Technical field [0001] The invention relates to the technical field of machinery, in particular to a pipe jacking unit. Background technique [0002] Among the various hot-rolled seamless steel pipe production processes, the pipe jacking process is one of the important methods. The main process is to use a heating furnace to heat the solid tube to about 1250°C, and then the cross-rolling piercing machine will The tube blank is threaded into a hollow tube, and then a mandrel is inserted into the hollow tube, the head of the hollow tube is pressed on the "step" of the head of the mandrel with a tube end necking machine, and then the core is pushed by the pushing rack driven by the gear The rod and the hollow tube pass through a series of roll dies. Three passive rolls form a round hole inside each roll die. The outer surface of the hollow tube is pressed by the rolls, and the inner surface of the hollow tube is pressed against the core. The rod is tightly attached, and the outer s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B25/00
Inventor 肖伟穆东陈碧楠
Owner CISDI ENG CO LTD