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Pipe joint

A technology for pipe joints and pipe walls, applied in the field of pipe joints, can solve problems such as difficulty in maintaining pipe holding conditions and sealing conditions, and weakening conditions of sleeve 104 biting pipe 101, etc., to achieve the effects of reducing manufacturing costs and improving efficiency and productivity

Inactive Publication Date: 2007-09-19
DENSO CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this configuration, however, if the tube 101 is pulled or jerked, the condition for the sleeve 104 to bite into the tube 101 will be weakened
Therefore, for long-term use, it will be difficult to maintain the tube holding condition and sealing condition using the sleeve 104

Method used

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Embodiment Construction

[0025] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2 . As shown in FIG. 1 , the pipe joint is used to connect the straight ends of two pipes 1 at the same time. Hereinafter, the right tube 1 in FIGS. 1 and 2 is called the first tube 1 , and the left tube in FIGS. 1 and 2 is called the second tube 1 .

[0026] The pipe joint usually has a joint body 2, a union nut 3 screwed on the joint body 2, and a lock ring 4 on the inner circumference of the joint body 2 and the union nut 3, and the lock ring 4 is connected to the first tube 1a is joined to the second pipe 1b. In addition, the pipe joint has a tightening distance restricting portion 5 a for restricting the tightening distance or tightening amount of the union nut 3 relative to the joint main body 2 .

[0027] The joint main body 2 is made of, for example, a metal having a predetermined hardness, such as carbon steel, stainless steel, or copper alloy. The joint main ...

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PUM

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Abstract

A pipe joint has a joint main body, a union nut connected to the joint main body, and a lock ring. The lock ring has a tubular wall, and a first axial end and a second axial end of the tubular wall are deformable by inner walls of tapered hole portion of the joint main body and the union nut. The lock ring has a first tapered opening portion providing a first groove for receiving a first end of a first pipe member and a second tapered opening portion providing a second groove for receiving a second end of a second pipe member, in a radial inside of the tubular wall. A radial outer surface of the first tapered opening portion and a radial outer surface of the second tapered opening portion are tapered such that the first groove and the second groove are narrowed toward its ends, respectively.

Description

technical field [0001] The invention relates to a pipe joint. Background technique [0002] Various different pipe connection methods are known. For example, it is known to weld the ends of two tubes with the ends of the tubes facing each other, or where the ends of one tube are inserted into the ends of the other tube. However, to weld a sealed tube having sufficient strength and high reliability at the welded portion requires skill and experience. Additionally, fire protection is required. [0003] Further, it is known to adopt the pipe joint shown in FIG. 3 as such a method that does not require such experience and firearms. As shown in FIG. 3 , tube 101 is connected to tubular fitting body 102 using union nut 103 and tubular sleeve 104 . This method is disclosed, for example, in US Patent Publication No. 2006 / 0091672A1 (JP-A-2004-44633). [0004] The joint body 102 has a threaded portion 102a on its first end to connect to an object such as an external device. The ...

Claims

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Application Information

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IPC IPC(8): F16L19/04
Inventor 落合优土本胜己中村文昭小野高志落合金次
Owner DENSO CORP
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