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Eccentric disc insertion tapered pipe fitting and manufacture method thereof

A manufacturing method and technology for reducing pipe, which are applied in the direction of pipes/pipe joints/fittings, manufacturing tools, passing elements, etc., can solve the problems of low efficiency, inability to prepare eccentric disk inserting reducing pipe fittings, time-consuming and labor-intensive, etc. High efficiency, convenient and unified excavation, good economical and practical effect

Active Publication Date: 2014-02-26
XINXING DUCTILE IRON PIPES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the conventional production method of pipe fittings is not suitable for the production of this kind of eccentric disc tapered pipe fittings, because the conventional concentric tapered pipe fittings have simple structure and axial symmetry, and the internal and external cavities of the pipe fittings are usually shaped by scrapers, which is time-consuming and labor-intensive. , the efficiency is low, and due to the axial asymmetry of the eccentric taper and the unique structure, it is impossible to prepare the invented eccentric disc insert taper with the existing scraper technology

Method used

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  • Eccentric disc insertion tapered pipe fitting and manufacture method thereof
  • Eccentric disc insertion tapered pipe fitting and manufacture method thereof
  • Eccentric disc insertion tapered pipe fitting and manufacture method thereof

Examples

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Effect test

Embodiment 1

[0031] To make DN 600*500 PN 16 eccentric disc tapered pipe fittings, choose DN 600 PN 16 flanges, the socket is DN500, the length is 110mm, the overall height of the pipe fittings is 600mm, the wall thickness of the flange end pipe fittings is 13.2mm, the socket The wall thickness of the pipe fittings is 12mm. The specific production steps are as follows:

[0032] (1) Make the lower box: Put the mold corresponding to the flange chassis 1 into the sand box and fix it, fill it with sand and shape it, then paint it and dry it to make the lower box;

[0033] (2) To make sand cores for eccentric tapered tubes: Firstly, according to the shape of the sand cores corresponding to the eccentric tapered tubes 2 to be manufactured, splice and weld 3-5 mm thick steel plates to make eccentric tapered core box molds. Then weld the core iron, put the finished core iron into the eccentric tapered core box mold, fill sand to shape, and then take the formed eccentric tapered tube body sand cor...

Embodiment 2

[0045] To make DN 1200*1000 PN 10 eccentric disc tapered pipe fittings, choose DN 1200 PN 10 flanges, the socket is DN1000, the length is 130mm, the overall height of the pipe fittings is 790mm, the wall thickness of the flange end pipe fittings is 20.4mm, the socket section The pipe wall thickness is 18mm. Concrete manufacturing steps are with embodiment 1.

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Abstract

The invention discloses an eccentric disc insertion tapered pipe fitting and a manufacture method thereof, and belongs to the technical field of nodular cast iron pipes. The manufacture method of the eccentric disc insertion tapered pipe fitting comprises the following specific steps of: manufacturing a lower box; manufacturing a sand core of an eccentric tapered pipe body; manufacturing a sand sheet; manufacturing a shape mould of the eccentric tapered pipe body; manufacturing a middle box; manufacturing an upper box; taking out a dead head mould from the upper box; taking out a sprue mould from the middle box; taking out a flange chassis module from the lower box, repairing the outer surface of a cavity and a runner system of the lower box, brushing dope and drying; combing the upper box, the middle box and the lower box, and manufacturing a sand box of the eccentric disc insertion tapered pipe fitting; pouring, and manufacturing a bland of the eccentric disc insertion tapered pipe fitting; processing by precise dimension, and manufacturing the eccentric disc insertion tapered pipe fitting which is needed. The invention has the following beneficial effects: (1) by utilizing the method for adhering the sand sheet to the exterior of the sand core of the eccentric tapered pipe body, and manufacturing the shape mould of the eccentric tapered pipe body, the manufacture cost of the mould is reduced with good economic usefulness; (2) the method disclosed by the invention is time-saving and labor-saving, and is high in efficiency.

Description

technical field [0001] The invention relates to an eccentric disc-inserted tapered pipe fitting and a manufacturing method thereof, belonging to the technical field of cast iron pipe fitting casting. Background technique [0002] At present, reducing pipe fittings are often used for pipe diameter reduction, and reducing fittings are generally designed and manufactured according to ISO2531, EN545 and EN598, such as double-support reducing fittings and double-disc reducing fittings, which are often used in pipeline installation, but these fittings They are all concentrically tapered, and the concentrically tapered pipe fittings are symmetrical in structure, simple in manufacture, and beautiful in appearance, but there are inconsistencies in the depth of trenching between large pipes and small pipes during pipeline laying, and inconsistent liquid levels at the bottom of large pipes and small pipes in use. Effusion is easy to appear in the pipeline. Especially in the environmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L25/14B22C9/24
Inventor 信绍广王黎晖吕金霞
Owner XINXING DUCTILE IRON PIPES CO LTD
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