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Fitting

A technology of pipe joints and flexible pipes, applied in the field of pipe joints, can solve problems such as long time

Active Publication Date: 2020-06-16
HITACHI METALS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the pipe joint described in the background art, since the selectively permeable member is covered by the joint main body, it is impossible to know where the selectively permeable member is located around the outer circumference of the joint main body, so it is difficult to connect the gas sensor closely. hole opening
Therefore, it may take a long time to detect the poor opening of the metal bellows
It should be noted that such a problem is not limited to the above-mentioned pipe joint in which a selectively permeable member is installed in the communication hole connecting the inner side and the outer side, and a pipe joint with a structure in which no selectively permeable member is disposed in the communication hole. also have the same problem

Method used

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Effect test

no. 1 approach

[0023] The pipe joint according to the first embodiment of the present invention has a structure in which sealing between the pipe joint and the flexible pipe joint is possible by performing an inserting step of inserting a flexible pipe into the pipe joint and a locking step of coupling the inserted flexible pipe to the pipe joint. A flexible tube is combined in a state between the sex tubes.

[0024] figure 1 It is a partial sectional side view showing the state after the insertion process of the pipe joint 10 according to the first embodiment of the present invention, figure 2 It is a partial cross-sectional side view showing the state of the pipe joint 10 after the locking process. image 3 It is a cross-sectional view showing a disassembled state of the pipe joint 10 . exist Figure 1 ~ Figure 3 Here, the X direction is a direction (axial direction) along the central axis OX of the pipe joint 10 . Hereinafter, the direction on the right side in the figure of the X di...

no. 2 approach

[0047] Figure 8 It is a top view of the periphery of the push nut 230 included in the pipe joint according to the second embodiment of the present invention. Figure 8 is the same as in the first embodiment Figure 7 The corresponding figure shows the periphery of the push nut 230 in the state after the locking process. The pipe joint in the second embodiment differs from the pipe joint 10 in the first embodiment in that the position of the communication hole 231d in which the selectively permeable member 110 is fitted is different. The other structures of the pipe joint in the second embodiment are the same as those of the pipe joint 10 in the first embodiment, so regarding the same constituent elements, Figure 8 marked with Figure 7 The same reference numerals are used and descriptions thereof are omitted.

[0048] The communication hole 231d is located more than the communication hole 31d in the first embodiment (refer to Figure 5 ) on the +X direction side, in the...

no. 3 approach

[0051] Figure 9 It is a top view of the periphery of the push nut 330 included in the pipe joint according to the third embodiment of the present invention. Figure 9 is the same as in the second embodiment Figure 8 The corresponding figure shows the periphery of the push nut 330 in the state after the locking process. The pipe joint in the third embodiment differs from the pipe joint in the second embodiment in that it does not have a spot facing portion, and a diamond-shaped mark 332 a is attached to the position where the spot facing portion is formed in the second embodiment. Since other structures of the pipe joint in the third embodiment are the same as those of the pipe joint in the second embodiment, regarding the same constituent elements, in Figure 9 marked with Figure 8 The same reference numerals are used and descriptions thereof are omitted. The marks 332 may be formed in other shapes such as a triangle or an arrow instead of a rhombus. Mark 332 correspon...

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Abstract

An object of the present invention is to shorten the time required for detecting a hole failure of a metal bellows. The present invention relates to a pipe joint for joining a flexible pipe in a sealed state with the flexible pipe. This pipe joint includes: a joint main body having an inner hole into which a flexible tube is inserted from one end in the axial direction; and a moving member which is an annular member into which the flexible tube is inserted, The end part of the inner hole is partially inserted into the inner hole and can move to a predetermined locking position. The moving member has a communication hole connecting the inner side and the outer side. When the moving member moves to the locking position, the communicating hole At least a part of the outer opening of the hole is covered by the joint main body, and the pipe joint further includes an indicator showing the position of the outer opening.

Description

[0001] This application claims priority based on Japanese Patent Application No. JP2017-70665 filed on March 31, 2017, and the entire disclosure thereof is incorporated into this application by reference. technical field [0002] The invention relates to a pipe joint. Background technique [0003] In general, in gas supply piping such as city gas, flexible pipes including corrugated metal bellows and pipe joints coupled to the flexible pipes are widely used from the viewpoint of workability and the like. For example, as shown in JP2004-316733A, the existing pipe joint has: a joint main body having an inner hole for inserting a flexible pipe; a holder provided in the inner hole; Press the retainer at the sliding position of the retainer so that the claws provided on the retainer are engaged with the retainer pressing member on the valley portion of the metal bellows. [0004] In the pipe joint shown in JP2004-316733A, a structure is described in which a communication hole co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L33/00
CPCF16L33/00
Inventor 猪谷崇明
Owner HITACHI METALS LTD
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