Hydraulic equipment based on prestressed stand column structure

By adopting a prestressed column structure with a steel plate-reinforced composite design, the manufacturing bottleneck and stress concentration problem of existing hydraulic equipment have been solved, achieving the effects of lightweight structure, uniform stress distribution and efficient manufacturing.

CN224276372UActive Publication Date: 2026-05-26JIANGSU NEW HENGJI SPECIAL EQUIP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JIANGSU NEW HENGJI SPECIAL EQUIP
Filing Date
2025-07-07
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing hydraulic equipment with beam-column type columns is limited by manufacturing scale, while wire-wound type has process reliability issues, and plate-frame type faces the contradiction between stress concentration and machining accuracy, making it difficult to meet the high efficiency and reliability requirements of heavy forging equipment.

Method used

The steel plate-reinforced steel composite design based on prestressed column structure is adopted. The column is a plate frame structure. Prestress is applied by tapered anchors to form a grid structure with intersecting directions. The initial prestress is applied by hydraulic tensioning method, and the pretension force of a single reinforcement is controlled at 650-750kN.

Benefits of technology

It significantly improves the overall rigidity and resistance to eccentric loads of hydraulic equipment, resulting in a lightweight structure, uniform stress distribution, convenient manufacturing, and superior fatigue performance.

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Abstract

The hydraulic equipment based on the prestress stand column structure comprises a base (101), a workbench (102), a stand column (103), a movable cross beam (104) and a fixed cross beam (106), and is characterized in that the stand column (103) is of a plate frame structure, the plate frame structure is composed of four coamings (1), a plurality of rib plates (2), an upper tensioning plate (3), a lower tensioning plate (3) and tensioning steel bars (4), the rib plates (2) are fixed in the coamings (1) to form a grid structure, and the upper tensioning plate (3) and the lower tensioning plate (3) are fixed on the workbench (102). Each grid structure is provided with a tensioning steel bar (4), the upper end and the lower end of each tensioning steel bar (4) are loaded with prestress through a conical anchorage device (5) and are fixed on the corresponding upper tensioning plate (3) and the corresponding lower tensioning plate (3), and the upper tensioning plate (3) and the lower tensioning plate (3) are installed at the upper end and the lower end of the surrounding plate (1). The hydraulic device is light in structure, uniform in stress distribution, convenient to manufacture and excellent in fatigue performance, the overall performance of the hydraulic device is remarkably improved, and the manufacturing cost is reduced.
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