Pipeline opening expanding device

By using the through-hole and enlargement design of the clamping plate, as well as the detachable ruler plate and positioning components, combined with the motor-driven telescopic universal joint and stop, the problem of inconsistent copper tube expansion depth is solved, achieving consistent copper tube expansion dimensions and automated production, thus improving production efficiency and adaptability.

CN223981074UActive Publication Date: 2026-03-10BEIJING GERCHIN SCI & TECH LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-11
Publication Date
2026-03-10

AI Technical Summary

Technical Problem

Existing manual expansion machines result in inconsistent expansion depths of copper tubes, leading to inconsistencies in the shape and size of the sealing surface at the expansion joint, which affects the stability of the interface performance.

Method used

It adopts a clamping plate through-hole and enlarged hole design, combined with a detachable ruler plate and positioning components. The automatic positioning and radial expansion of the clamping plate are achieved by a motor-driven telescopic universal joint and stop block. It provides multiple levels of flaring depth selection and supports automatic and manual control modes.

Benefits of technology

To ensure consistent copper tube expansion joint dimensions, improve production efficiency, achieve automated production and simplify operations, and adapt to different working conditions.

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    Figure CN223981074U_ABST
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Abstract

The utility model relates to the technical field of pipeline machining, and discloses a pipeline opening expanding device which comprises a rack. The opening expanding device is mounted on the rack; the clamping plate is installed in the eccentric conical head steel ball positioning part of the expanding device, a through hole and an expanded hole are formed in the clamping plate, a copper pipe is inserted into the through hole, and the copper pipe is expanded to be in contact with the expanded hole; the positioning assembly is installed on the rack and used for fixing the clamping plate and the ruler plate, installation holes with different depths are formed in the positioning assembly, and when the clamping plate is attached to the ruler plate, the through hole and the installation holes are coaxially communicated. The device can adapt to different flaring depth requirements, and the copper pipe flaring quality is improved.
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