Title:
SLIDE GATE AND HYDRAULIC CYLINDER REMOVING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP2022057298
Kind Code:
A
Abstract:
To carry in and out a hydraulic cylinder without removing a bonnet cover when performing maintenance work on the hydraulic cylinder of a slide gate.SOLUTION: The inventive slide gate comprises a door body 14 that can open and close an opening for discharge, a hydraulic cylinder 1 that raises and lowers the door body 14, a piston rod 1b that protrudes from the hydraulic cylinder 1 and is pushed and pulled to connect the door body 14 by sandwiching and tightening it between an upper nut 2 and a lower nut 3 attached to a tip, a bonnet cover 4 that separates the inside of a slide gate body into which water flows and an operation room connected to the atmosphere, and can be opened and closed for disassembly and assembly, a gasket portion provided in a center of the bonnet cover 4 that slides in the vertical direction while the piston rod 1b penetrates for water sealing, and an inner sleeve 5 that is incorporated in the center of a gasket case 4a and that, when removed, creates an opening larger than the outside diameter of the upper nut 2, allowing the piston rod 1b to be pulled out with the upper nut 2 attached.SELECTED DRAWING: Figure 1A
Inventors:
KAWAI KOJI
Application Number:
JP2020165477A
Publication Date:
April 11, 2022
Filing Date:
September 30, 2020
Export Citation:
Assignee:
IHI INFRASTRUCTURE SYS CO LTD
International Classes:
E02B7/28
Attorney, Agent or Firm:
Maeda patent office