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Threaded joint for forming telescopic flexible pipe fitting

A technology of threaded joints and pipe fittings, which is applied in the direction of pipe components, adjustable connections, pipes/pipe joints/pipe fittings, etc., can solve the problems of complex process, high material consumption and high cost of scalable flexible pipe fittings, and achieve saving stainless steel materials, The effect of strong competitiveness and high cost

Active Publication Date: 2014-08-20
四川民生管业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The threaded joints that make up the telescopic flexible pipe fittings proposed by the present invention solve the problem that the existing telescopic flexible pipe fittings have complex processes, many materials, and high cost; they can only be used for pipe fittings of stainless steel pipes; The solution to the leakage of various media pipelines under thermal expansion and contraction and various external forces

Method used

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  • Threaded joint for forming telescopic flexible pipe fitting

Examples

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Effect test

Embodiment 1

[0026] Threaded joints that make up telescopically flexible pipe fittings. For direct fittings. See Figure 4 -See Figure 9 , Figure 10 , Figure 11 .

[0027] 1) see Figure 4 , the pipe fitting is provided with a pipe fitting sleeve 1, and the outer circumference of the pipe fitting sleeve is covered with an externally threaded wire ring 2; the rear end of the wire ring 2 is provided with an inner bell mouth 2.2, which is used to expand the outer opening 1.1 of the pipe fitting sleeve. match. The outer thread 2.1 of the silk ring engages with the inner thread 3.1 of the lock nut to lock the threaded joint. 2) The X-Y shape of the above-mentioned flared longitudinal section can be one of the following three types: ① see Figure 5 , and the axis X has a hypotenuse 1.1a with an angle α1 of 50°, which is called single external expansion. The filling area of ​​the sealing rubber ring is the area Sa of a right triangle. See Figure 8 , The circular cross-sectional are...

Embodiment 2

[0035] Threaded joints that make up telescopically flexible pipe fittings. For tee fittings. See Figure 4 -See Figure 9 , Figure 12 , Figure 13 . Present embodiment 2, except that following structure is different from embodiment 1, it is exactly the same: see Figure 12 , in this embodiment 2, the telescopic flexible threaded joint is used for the three-way pipe fittings, which are three joints, which are respectively connected according to the above-mentioned joints at the joints. Figure 4 The connected pipe 4 at the three ends is adorned with three sets of threaded joints. Figure 4 The pipe fitting sleeve 1 in the three-way pipe fitting is called the three-way pipe fitting sleeve 13 (three ports), see Figure 13 Draw the three-way pipe fitting sleeve pipe 13 one-piece figures among. When the working pressure of the pipeline is not greater than 2.5MPa, the pipe sleeve 13 is a thin-walled pipe with a wall thickness of ≤2mm.

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Abstract

The invention relates to a threaded joint for forming a telescopic flexible pipe fitting. The pipe fitting consists of a pipe fitting sleeve and an external-thread screw ring outside the pipe fitting sleeve. A locknut, a rubber sealing ring, a gasket, a snap ring and a snap ring groove are arranged outside a connected pipe which is inserted into the pipe fitting sleeve, wherein the locknut is provided with internal threads which are engaged with external threads, the rubber sealing ring and the gasket are arranged in an external expansion port of the pipe fitting sleeve, and the rear end of the connected pipe is provided with the snap ring and the snap ring groove. The rear end of the locknut is provided with a circular-ring-shaped sliding chute and an anti-pull-out internal lug boss. A reasonable matching gap between the snap ring and the circular-ring-shaped sliding chute is selected, so that the situation that the snap ring moves and is difficultly subjected to radial slippage when the connected pipe is subjected to expansion caused by heat and contraction caused by cold is guaranteed, and the trouble-free operation is realized. A rubber compression amount and a matching gap which are appropriate are selected so as to enable the telescopic flexivity to be greater than or equal to + / -2.2. Without increasing the cost, the inserted length can be increased, and the reliability can be improved. The pipe fitting sleeve is made of a thin-walled pipe, so that the one-piece casting is not required, the materials are saved, and the cost is low. The threaded joint is arranged outside the external expansion port and isolated from a medium, thereby being applicable to any pipeline for conveying any medium, e.g. stainless steel, carbon steel, ductile cast iron, plastics, glass fiber reinforced plastics, and the like. Furthermore, the threaded joint is universal to pipeline interfaces with the same pipe diameter.

Description

[0001] (1) Technical field: The threaded joint that forms the flexible flexible pipe fitting is a kind of pipe fitting used for pipeline connection, which belongs to the pipe joint or pipe fitting category (F16L). (2) Background technology: [0002] With the development of modernization, the pipelines that transport various media today include the following: high-rise water supply, gas supply pipelines, high and low pressure gas transmission pipelines, airport oil depot pipelines, underground buried pipelines in earthquake-prone areas, and underground pipeline networks connected across roads , ship pipelines, missile launch sites and satellite launch base pipeline systems, etc. The pipelines and fittings in these important places are subjected to thermal expansion and contraction, various external forces and vibrations, which lead to leakage accidents of the medium transported by pipelines, especially dangerous. Leakage of dangerous media, in order to effectively protect the sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L27/00F16L51/00
Inventor 廖仲力
Owner 四川民生管业有限责任公司
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