Diameter-expanding device for shape memory alloy reducing tube joint

A memory alloy and reducing pipe technology, which is applied in the field of shape memory alloy reducing pipe joint diameter expansion devices, can solve the problems of design and diameter expansion, etc.

Inactive Publication Date: 2016-12-14
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the design and diameter expansion of shape memory alloy reducing pipe joints have not been seen so far.

Method used

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  • Diameter-expanding device for shape memory alloy reducing tube joint
  • Diameter-expanding device for shape memory alloy reducing tube joint
  • Diameter-expanding device for shape memory alloy reducing tube joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Such as Figure 1 to Figure 6 The diameter expansion device of a shape memory alloy variable diameter pipe joint shown includes: a base 2, a guide bush 3, a diameter expansion pressure rod 4 and a split expansion block 5;

[0028] The upper end of the base 2 is preset with a longitudinally extending sleeve guide hole 2-1;

[0029] The guide bush 3 is assembled in the bush guide hole 2-1, and the height of the guide bush 3 is equal to the depth of the bush guide hole 2-1;

[0030] Expanding pressure rod 4 is a variable-diameter cylindrical rod body, the lower part of which is processed into a guide section 4-3 with a smaller diameter, the middle transition part is processed into a conical reaming section 4-1, and the upper part of the conical reaming section 4-1 is processed into The retaining section 4-2 with a larger diameter, the upper part of the retaining section 4-2 is processed into an unloading section 4-4 whose diameter is smaller than that of the retaining sec...

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PUM

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Abstract

The invention discloses a diameter-expanding device for a shape memory alloy reducing tube joint. The device comprises a base, a guide shaft sleeve, a reducing compression bar and split diameter-expanding blocks, wherein a shaft sleeve guide hole which extends longitudinally is pre-formed in the upper part of the base; the guide shaft sleeve is assembled in the shaft sleeve guide hole; a push rod guide hole which extends longitudinally is machined at the center of the guide shaft sleeve; the diameter-expanding compression bar is a reducing cylindrical bar body, the lower part is machined to a guide section with a relatively small diameter and the middle transitional part is machined to a cone-shaped hole-expanding section, the upper part of the cone-shaped hole-expanding section is machined to a retaining section which is relatively greater in diameter, and the upper part of the retaining part is machined to a sleeve removing section which is smaller than the retaining section in diameter; the split diameter-expanding blocks are fan-shaped blocks which averagely cut a ring, and the cutting quantity is greater than or equal to 2; the split diameter-expanding blocks are embedded into the large-diameter part of the shape memory alloy reducing tube joint. According to the device disclosed by the invention, the diameter-expanding compression bar presses downward gradually, so that the cone-shaped hole-expanding section and the retaining section successively act on the split diameter-expanding blocks inside the small-diameter part and the large-diameter part of the shape memory alloy reducing tube joint so as to integrally expand the diameter.

Description

technical field [0001] The invention relates to a mechanical diameter expanding device, in particular to a diameter expanding device of a shape memory alloy variable diameter pipe joint. Background technique [0002] Shape memory alloy is a metal functional material with shape memory effect, and pipe joint is one of its successful applications. [0003] The shape memory alloy variable diameter pipe joint can connect two pipelines with different diameters, which is different from the traditional electric welding and threaded connection. The shape memory alloy variable diameter pipe joint is formed by superimposing two cylindrical sleeves, including the small end and the large end. It is machined in the parent phase state, and its inner diameter is slightly smaller than the outer diameter of the connected parts. In application, the shape memory alloy variable diameter pipe joint is cooled to the martensitic state, and the diameter of the variable diameter pipe joint is expand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D39/20B21D39/04
CPCB21D39/046B21D39/20
Inventor 林成新姜东刘志杰
Owner DALIAN MARITIME UNIVERSITY
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