CN86203302U

CN86203302U - Slide proof device for removed iron core in holing pipeline

Info

Publication number: CN86203302U
Application number: CN 86203302
Authority: CN
Inventors: 吴孝衡
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-05-22
Filing date: 1986-05-22
Publication date: 1987-04-15

Abstract

The utility model relates to a cutting device which prevents an iron core from sliding into a pipe when a pipeline is holed. The utility model is characterized in that the iron core is directly taken out from the working surface. The device is composed of a hollow milling cutter and a composite cutting tool, wherein, the composite cutting tool is positioned in the hollow milling cutter, and is composed of a drill head and a screw tap. When the hollow milling cutter mills the iron core from the pipe wall, the screw tap of the composite cutting tool is in threaded connection with the iron core and can be directly taken out along with a cutter bar. Thereby, the iron core is prevented from sliding in the pipeline.

Description

Slide proof device for removed iron core in holing pipeline

The utility model is perforate and prevent that core iron from sliding into the topping machanism in the pipe on pipeline.

Methods such as the gas cutting that perforate is adopted on pipeline at present, milling tend to make core iron to fall into pipeline, and it is very inconvenient to take out core iron.

The purpose of this utility model be to provide a kind of can be on pipeline perforate and prevent that core iron from sliding into the topping machanism of pipeline.This device is achieved in that and is fixed on the knife bar with the composite cutting tool that has drill bit, screw tap having hollow multiple tooth milling cutter that composite cutting tool is positioned among the cavity of milling cutter.When milling cutter when tube wall mills down core iron, can utilize the thread connection of screw tap and core iron, with knife bar core iron is taken out of.Concrete structure of the present utility model is provided by following examples and accompanying drawing.

Accompanying drawing is a generalized section of the present utility model.When brill milled operation, knife bar (4) drove milling cutter (3) and composite cutting tool (2) rotation by flat key (5), and composite cutting tool (2) is made up of drill bit and screw tap two parts.Drill bit is break-through tube wall (1) at first, plays positioning action, gets out datum hole for next step screw tap tapping simultaneously.When milling cutter (3) milling tube wall, the tapping on the datum hole that drill bit gets out simultaneously of the screw tap of composite cutting tool (2).When milling cutter (3) when tube wall mills out the cake core iron, the datum hole of core iron becomes thread connection with screw tap, milling cutter (3) can be taken core iron out of when withdrawing from knife bar (4) with composite cutting tool (2), has avoided core iron to slip in the pipeline.

Claims

A kind of can be on pipeline perforate and prevent the topping machanism of core iron landing, it is characterized in that this device is made of the composite cutting tool [2] that is fixed on the hollow multitoothed cutter [3] on the knife bar [4] and has drill bit, a screw tap, composite cutting tool [2] is positioned among the cavity of milling cutter [3].