Self-anchoring port fixedly-connecting structure

An interface and fixed welding technology, which is applied in the direction of flange connection, sleeve/socket connection, pipe/pipe joint/pipe fitting, etc., can solve the problem that the self-anchor interface cannot meet the requirements, so as to prevent mutual disengagement and reduce construction costs , The effect of bolt strength improvement

Inactive Publication Date: 2011-04-06
XINXING HEBEI ENG & RES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-slip interface designed in the past can only meet the pressure requirements of PN10 low-pressure pipelines. With the increase of pipeline pressure, the ordinary self-anchored interface can no longer meet the requirements

Method used

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  • Self-anchoring port fixedly-connecting structure
  • Self-anchoring port fixedly-connecting structure

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Embodiment Construction

[0008] As shown in the drawings, the socket 11 of the ductile iron pipe is inserted into the socket 10 of the ductile iron pipe. There is a sealing groove 9 on the inner wall of the socket 10, and a sealing ring 8 is embedded in the sealing groove 9. The left end of the socket 10 There is a pressure flange 3 on the top of the surface, and the pressure flange 3 is fixed to the socket 10 through the bolt 1, the nut 2 and the pressure block 7. The pressure flange 3 has a tapered inner hole 5, and the socket 11 in the tapered inner hole 5 is covered with a stopper. Ring 4, fixed welding ring 6 on the socket 11 of retaining ring 4 right-hand sides.

[0009] The pressure flange 3 is an integral circular ring.

[0010] When the interface is affected by the internal water pressure, an axial force is generated, and the socket 11 of the ductile iron pipe will be pulled out from the socket 10. The interaction is transmitted to the pressing block 3 and the bolt 1, and because the bolt 1 ...

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Abstract

The invention relates to a self-anchoring port fixedly-connecting structure of nodular cast iron pipes for a water pipe. A port of one nodular cast iron pipe is inserted into a bell mouth of the other nodular cast iron pipe, a sealing groove is arranged in the inner wall of the bell mouth, a sealing ring is embedded in the sealing groove, a press flange is supported against the left end face of the bell mouth, the press flange is fixed with the bell mouth through a bolt, a nut and a press block, the press flange is provided with a tapered inner hole, a port in the tapered inner hole is sleeved with a baffle ring, and a port at the right end of the baffle ring is fixed with a welding ring. Axial force generated by water pressure is resisted by using interaction among the port parts of the welding ring, the baffle ring, the press flange, the high-strength bolt and the press block, the nodular cast iron pipes can be prevented from mutually separating under a higher pipe operation pressure, setting of rest piers is avoided, thus the construction cost of the pipe is greatly lowered.

Description

technical field [0001] The invention relates to a self-anchor interface fixed connection structure of a ductile iron pipe used in a water delivery pipeline. Background technique [0002] The ductile iron pipe interface type is a connection method that must be selected in pipeline design. The slide-in T-type interface is the most commonly used in construction. It has a simple structure, is easy to install, and can ensure good sealing performance. But its disadvantage is that it does not have the performance of anti-pull-off, and it is necessary to set up buttresses where the pipeline turns, climbs, stops or changes diameters. In some special areas or where the space is limited, buttresses are not allowed, restricted joints must be used to resist the thrust generated by water pressure. The anti-slip interface designed in the past can only meet the pressure requirements of PN10 low-pressure pipelines. With the increase of pipeline pressure, the ordinary self-anchoring interfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L23/02
CPCF16L21/08
Inventor 刘志丽李军徐军叶卫合
Owner XINXING HEBEI ENG & RES INC
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