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Positive lock system for restrained joints of ductile iron spun pipes and fittings

A ductile iron pipe, centrifugal casting technology, applied in the direction of pipe/pipe joint/pipe fitting, packing and sealing connection with fluid pressure, passing through components, etc., can solve problems such as ease of use and limitations of speed joint pressure level

Active Publication Date: 2020-01-24
JINDAL SAW LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing constrained joints have limitations in terms of ease and speed of assembly, need for a large number of parts, joint pressure ratings

Method used

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  • Positive lock system for restrained joints of ductile iron spun pipes and fittings
  • Positive lock system for restrained joints of ductile iron spun pipes and fittings
  • Positive lock system for restrained joints of ductile iron spun pipes and fittings

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Embodiment Construction

[0046] A detailed description of various embodiments of the invention is presented below with reference to the accompanying drawings.

[0047] Embodiments of the present invention are described in detail with reference to the drawings. However, the present invention is not limited to the Examples, which are provided only to explain the present subject matter more clearly to those skilled in the art of the present disclosure. In the drawings, the same reference numerals are used to denote the same components.

[0048] The specification may refer to "a", "an", "different" or "some" embodiments in several places. This does not necessarily mean that such references are all to the same embodiment, or that a feature is only applicable to a single embodiment. Single features of different embodiments may also be combined to provide other embodiments.

[0049] As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless expressly st...

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PUM

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Abstract

The present invention relates to novel positive lock system for restrained joints of ductile iron spun pipes and fittings which are able to take all the thrust loads produced due to transmitting fluids pressure and provide certain angular deflections to the axis of two pipes. For ductile iron pipe to be joined, a socket (bell shape) and a spigot (plain end) sections are provided in pipes. For joining plain end is inserted in bell shape end. As the water pressure surges, the joint tends to disengage due to increasing axial loads. To take these axial loads, a circumferential chamber is providedin bell shape end and plain end is provided with a weld bead of suitable size. Axial forces generated due to water pressure are transmitted to pipe socket through welding via locking segments. Lockingsegments are inserted in circumferential chamber and they stays between chamber and welding bead. Circumferential chamber has suitable clearances to provide the required angular deviations at the joint.

Description

technical field [0001] The present invention relates to a positive lock coupling system for ductile iron centrifugally cast pipes and fittings. More specifically, the present invention relates to a lockout system for constraining joints of ductile iron centrifugally cast pipe and fittings and a process for its assembly. Background technique [0002] Ductile iron centrifugally cast pipe has been used to distribute potable water and sewage since the late 1950s. Due to its better structural properties and various other features, this type of pipe is a direct development of earlier cast iron pipes. [0003] Ductile iron pipe is manufactured by centrifugal casting of molten metal. Several types of rubber gasket joints are available with ductile iron pipe and fittings to suit various applications. In addition to flanged joints, the following two types of joints are possible: [0004] a. Push-in fittings, [0005] b. Constrained joints. [0006] The most widely used fittings ...

Claims

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Application Information

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IPC IPC(8): F16L17/00F16L37/00
CPCF16L21/08
Inventor 阿努拉克·什里瓦斯塔瓦V·拉贾塞卡兰帕塔·博斯K·苏布拉莫尼安
Owner JINDAL SAW LTD