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Spigot and socket joint steel pipe and its manufacture

A technology of socket type and steel pipe, which is applied in the direction of sleeve/socket connection, pipe/pipe joint/pipe fitting, passing components, etc., which can solve the problems of unreliable insertion and achieve good sealing, convenient socketing, The effect of a stable connection

Inactive Publication Date: 2006-08-16
ZHEJIANG KINGLAND PIPELINE & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the water pipe connection is a more convenient socket-type structure, its socket head is only composed of a straight pipe section and a circular arc transition section.

Method used

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  • Spigot and socket joint steel pipe and its manufacture
  • Spigot and socket joint steel pipe and its manufacture
  • Spigot and socket joint steel pipe and its manufacture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] In this embodiment, spiral welded steel pipes are used. A retaining ring 2 is welded on the circumference of one end of the pipe body 3, and the pipe end becomes the plug 1. Above-mentioned retaining ring 2 can be made with round steel or the edge lath cut off with spiral steel pipe. The diameter of the round steel or the height of the lath is 0.25-0.75 times of the diameter of the radial section of the neck body of the O-ring. The socket head 9 at the other end of the pipe body 3 is composed of the arc transition section 4, the short tube load-bearing section 5, the arc transition section 6, the short tube sealing section 7 and the insertion guide section 8, that is, the inner part of the short tube sealing section 7 open end. An expanded diameter port composed of a pour port and integrally formed. Among them, the function of the short pipe load-bearing section 5 is to bear the weight of the steel pipe plug and compensate the thermal expansion and contraction of the ...

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Abstract

The spigot and socket jointed steel pipe consists of integrated socket, pipe body and spigot and features that socket formed by one retaining ring fixed onto one end of the pipe body and the spigot comprising one first arced transition section, one force bearing short pipe section, one second arced transition section, one sealing short pipe section and one inserting guide section connected successively. The manufacture process of the spigot and socket jointed steel pipe includes heating one processed end to 800-1100 deg.c upset forging and hole enlargement with a spigot die to form the spigot, and welding one retaining ring at the other end. The spigot and socket jointed steel pipe is simple in structure, easy to connect, high in sealing performance, high in strength and relatively light and may be used to replace cast iron pipe after being anticorrosion treated.

Description

technical field [0001] The invention belongs to the technical field of pipes, in particular to a steel pipe with a socket joint and a processing method thereof. Background technique [0002] Socket connection is a commonly used connection method for cement pipes and cast iron pipes with larger diameters. It has simple structure, convenient installation and construction, and high work efficiency. However, cement pipes and cast iron pipes have the disadvantages of low compressive strength, bulky wall thickness, poor plasticity and toughness, which make them unsuitable for use in situations such as high conveying pressure and overhead pipes. However, steel pipes can overcome the above-mentioned shortcomings of cement pipes and cast iron pipes, but there are some difficulties in field construction for the connection of larger diameter steel pipes, because the usual screw thread or flange connection methods are not suitable due to difficult operation o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L21/00B21D41/02
Inventor 潘克云
Owner ZHEJIANG KINGLAND PIPELINE & TECH CO LTD