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Flexible pipe joint

A flexible pipe and pipe body technology, applied in the field of flexible pipe joints, can solve problems such as the inability to achieve sludge accumulation flow loss and other problems

Inactive Publication Date: 2004-04-21
WATERWORKS TECH DEV ORG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, because any kind of situation all can not completely bury the recessed part that forms at the partial spherical outer surface 2a of 1 side, 1d and the partial spherical inner surface 3a of the 2nd tubular body 3 relative sliding range, so can not To fully prevent the accumulation of sludge and reduce the effect of flow loss

Method used

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  • Flexible pipe joint
  • Flexible pipe joint
  • Flexible pipe joint

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0064] Figure 1 to Figure 7 It shows the telescopic flexible pipe joint provided in the piping system of the sewer pipe which is an example of a fluid pipe. On both ends of the first pipe body 1 made of cast iron, which is formed as a socket pipe and formed in a straight pipe shape, a cast iron pipe body made of cast iron made of a partially spherical outer surface 2a is fitted in a relatively slidable manner in the direction of the pipe axis X direction, respectively. Spherical ring 2. In addition, on each spherical ring 2, a second pipe body 3 made of cast iron formed as a socket pipe is externally fitted and connected along the partially spherical outer surface 2a of the spherical ring 2 to slide (freely bend) relatively. Part spherical inner surface 3a at one end.

[0065] On each of the two ends of the tube axis X direction on the outer surface of the first tube body 1, the length of the tube axis X direction is one The annular restricting groove 4 formed on the side ...

no. 2 Embodiment approach

[0079] Figure 8 , Figure 9 An improved form of the telescopic flexible pipe joint described in the first embodiment is shown. The sleeve 15 is provided with a fixing mechanism A that prevents relative movement in the direction of the tube axis X with respect to one of the second tube bodies 3 . There are also a plurality of temporary fixing protrusions 15c in the circumferential direction that engage with the annular recess 1b formed on the inner surface 1a of the other first tube body 1 to prevent the relative movement of the two 15, 3 in the X direction of the tube axis. . Thereby, the said temporary fixing protrusion 15c is comprised so that temporary fixing may be released by shearing by the external force in the direction of pipe axis X direction by an earthquake etc. FIG.

[0080] The base end side of the sleeve 15 is fixed on the second tubular body 3 on one side by the fixing mechanism A. In addition, because the insertion front end side of the sleeve 15 is connec...

no. 3 Embodiment approach

[0084] Figure 10 Another embodiment of the fixing mechanism A described in the first embodiment is shown. On the outer surface of the sleeve 15, the entire circumferential direction engaged with the engaging groove 1c formed on the inner surface 1a of the first tubular body 1 is shown. A plurality of locking protrusions 15d are formed. Accordingly, it is configured to prevent relative movement between the sleeve 15 and the first pipe body 1 in the direction of the pipe axis X.

[0085] In this embodiment, contrary to the first embodiment, the sleeve 15 and the second pipe body 3 are relatively freely slidable in the X direction of the pipe axis.

[0086] In addition, since the other configurations are the same as those described in the first embodiment, the same configuration parts are denoted by the same symbols as in the first embodiment, and their descriptions are omitted.

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PUM

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Abstract

A flexible pipe joint joins, in a bendable manner, a first pipe member (1) provided with a partially spherical outer circumferential surface (2a) that protrudes outward in radial direction and a second pipe member (3) provided with a partially spherical inner surface (3a) that can slide along the partially spherical outer circumferential surface (2a). A sleeve (15) made of a synthetic resin is inserted and fitted in a state of contact, bridging the inner circumferential surfaces of the two pipe members. The sleeve has a length that covers a cavity portion that opens inward in radial direction at a location where the two pipe members are joined together, and is elastically deformed substantially maintaining its circular tube shape when following a flexure of the two pipe members. The flexible pipe joint effectively suppresses impediments to the flow volume such as the deposition of sludge and grime while ensuring the intended bendability due to relative sliding of a partially spherical outer circumferential surface (2a) of a first pipe member (1) and a partially spherical inner circumferential surface (3a) of a second pipe member (3).

Description

technical field [0001] The present invention relates to the ability to operate when external forces such as shearing force and bending moment in the direction intersecting the axis of the pipe core due to earthquakes and various subsidences act on the piping system of fluid pipes such as sewer pipes buried underground. The pipe joint part absorbs this external force as much as possible and prevents damage to the fragile part of the piping system. Specifically, it relates to a first tubular body having a partially spherical outer surface protruding outward in the radial direction, and a second tubular body having a partially spherical inner surface slidable along the partially spherical outer surface is freely bent and connected. flexible pipe joints. Background technique [0002] As such a flexible pipe joint, there are the following two types. [0003] (A) if Figure 13 The flexible pipe joint of the shown type passes through a pair of diametrically opposed notches formed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L27/12F16L27/04F16L27/06
CPCF16L27/026F16L27/04F16L27/06
Inventor 户次浩之净住勤
Owner WATERWORKS TECH DEV ORG CO LTD