A push-pull hydraulic cylinder system for ladle sliding nozzle

By designing automatic cooling liquid and extracting inert gas in the sliding port of the ladle hydraulic cylinder system, the problems of hydraulic oil heating and pollution caused by the direct contact between the piston rod and the hydraulic oil are solved, and the stable use of the hydraulic cylinder and the improvement of the equipment life are achieved.

CN119755170AInactive Publication Date: 2025-04-04SHANGHAI LONGZHENG HYDRAULIC EQUIP MFG CO LTD
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Patent Information

Application Number
CN202510233126.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-28
Publication Date
2025-04-04
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

In the prior art, the piston rod is directly in contact with the hydraulic oil, causing the hydraulic oil to heat up under a high temperature environment and generate pollutants, affecting the stable use of the hydraulic cylinder.

Method used

A ladle sliding water port push-pull hydraulic cylinder system is designed. When the piston rod is driven to extend and retract through the piston head, it cooperates with the liquid inlet pipe and drain hole to automatically replace the coolant, and heat exchange is performed when the piston rod is retracted. At the same time, inert gas is extracted through the ventilation holes to prevent heat from being transferred into the hydraulic oil.

Benefits of technology

It effectively prevents the hydraulic oil from heating up and contaminating in high temperature environments, and maintains the stable use of the hydraulic cylinder and the equipment life.

✦ Generated by Eureka AI based on patent content.
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Abstract

The present invention relates to the technical field of sliding nozzle hydraulic cylinder, and specifically to a ladle sliding nozzle push-pull hydraulic cylinder system, comprising a cylinder body, a piston tube is arranged in the cylinder body, a cavity is arranged between the outer wall of the piston tube and the cylinder body, a hydraulic oil hole 1 and a hydraulic oil hole 2 are arranged on the cylinder body respectively connected with the two sides of the piston tube, and a liquid inlet pipe is arranged on the piston tube; a push-pull assembly, the push-pull assembly comprises a piston head located in the piston tube, the piston head is slidably connected with the liquid inlet pipe, a sealing cover is arranged at one end of the piston tube, a piston rod slidably connected with the sealing cover is arranged on the piston head, a fixed sleeve 1 is arranged on the side of the piston head facing the sealing cover, a fixed sleeve 2 is arranged on the side of the sealing cover facing the piston head, the fixed sleeve 2 is slidably connected with the fixed sleeve 1, and a drainage hole is arranged on the sealing cover. The present invention automatically replaces the coolant between the piston rod and the fixed sleeve 2, effectively avoiding the local cooling liquid from being retained between the cylinder body and the piston tube for a long time, improving the heat dissipation effect, and maintaining the stable use of the equipment.
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