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A Y-shaped corrugated pipe with one-way elongation compensation, forming device and forming method

A bellows, one-way technology, applied in the expansion compensation device for pipelines, pipe components, pipes/pipe joints/fittings, etc., can solve the problem that the bellows cannot meet the requirements, so as to reduce the mold design and processing costs, High axial load capacity and the effect of improving the service life

Active Publication Date: 2020-12-01
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing bellows with retractable compensation cannot meet the requirements

Method used

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  • A Y-shaped corrugated pipe with one-way elongation compensation, forming device and forming method
  • A Y-shaped corrugated pipe with one-way elongation compensation, forming device and forming method
  • A Y-shaped corrugated pipe with one-way elongation compensation, forming device and forming method

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specific Embodiment

[0067] Fix the fixed ends of the upper die 2, the lower die 17, the upper positioning die 3, and the lower positioning die 16 on the upper and lower beams of the expansion wave machine respectively, and at the same time, fix the multiple split punches on the uniform through their respective push rods. On the piston rod of the cloth hydraulic cylinder, the molds are arranged in order from left to right, that is, the upper die, the lower die, the upper positioning die, the lower positioning die and multiple split punches, the upper die, the lower die and the upper die. The locating mold and the lower locating mold hold the tube blank 6 tightly from the outside under the action of the upper beam and the lower beam of the expansion machine, as image 3 shown.

[0068]Place the four sealing rings in the bellows tube blank, and the first sealing ring 19 is pushed by the first oil discharge rod to the position where its smooth surface is on the same surface as the force point of the ...

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Abstract

The invention provides a Y-shaped corrugated pipe with unidirectional elongation compensation, wherein the edge part of the corrugated pipe comprises a plurality of adjacently arranged waveform structures, each waveform structure comprises a wave crest of a Y-shaped structure and a groove of a drop-shaped structure, the wave crest of the Y-shaped structure comprises two U-shaped waves, and the twoU-shaped waves form two branches of the Y-shaped structure. Meanwhile, the invention further provides a forming device and a forming method of the Y-shaped corrugated pipe with the one-way extensioncompensation function. The Y-shaped corrugated pipe has good axial elongation compensation capacity and higher axial bearing capacity, the corrugated pipe can meet axial elongation displacement compensation under the high-temperature condition, and the service life of the corrugated pipe is prolonged. According to the method, a two-step forming process can be adopted, the die design and machiningcost is reduced, and meanwhile the production efficiency of the corrugated pipe is improved.

Description

technical field [0001] The invention relates to a corrugated pipe forming method, in particular to a Y-shaped corrugated pipe with unidirectional elongation compensation and a forming method. Background technique [0002] Bellows is a high-quality flexible pipe in modern industrial pipelines. It has good flexibility, fatigue resistance, high pressure bearing, good temperature resistance, corrosion resistance, and strong sealing. Widely used in petroleum, aviation, aerospace, chemical industry, electric power, transportation and other industries. With the development of modern industry, the demand for high-quality and high-performance bellows is increasing. At present, the simple U-shaped, S-shaped and Ω-shaped bellows have limited ability to bear axial loads. Higher requirements are put forward for the unidirectional elongation compensation ability and axial bearing capacity. Existing bellows that are scalable and compensated cannot meet the requirements. Therefore, it is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/045B21D26/047F16L51/02
CPCB21D26/045B21D26/047F16L51/02
Inventor 骆俊廷顾勇飞郝增亮王凤双张春祥
Owner YANSHAN UNIV
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