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Three-level double-action self-attaching hydraulic jack

A hydraulic jack, three-stage double-acting technology, applied in the direction of lifting devices, etc., can solve the problems of automatic cylinder retraction and oil recovery

Active Publication Date: 2015-06-10
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that the synchronous fall process of the traditional jack can only rely on the self-weight of the beam body to press back the hydraulic oil inside the jack, and cannot realize automatic cylinder and oil return.

Method used

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  • Three-level double-action self-attaching hydraulic jack
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  • Three-level double-action self-attaching hydraulic jack

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Embodiment Construction

[0033] See attached Figure 1 to Figure 19 As shown, the present embodiment provides a three-stage double-acting self-fitting hydraulic jack 7 and a hydraulic pump station system 44 for automatic control and distribution of oil volume. The external structure of each three-stage double-acting self-fitting hydraulic jack 7 consists of a first-stage piston cylinder 6, a second-stage piston cylinder 5, a third-stage piston cylinder 1, an external oil cylinder 43, and a digital flowmeter 8 (equipped with Digital flowmeter data line 22), oil cylinder oil inlet 9 are jointly formed, as figure 1 and Figure 15 As shown, the second-stage piston-cylinder body 5 and the third-stage piston-cylinder body 1 are arranged inside the first-stage piston-cylinder body 6 . The hydraulic pumping station system 44 with automatic control of oil quantity distribution sets multiple three-stage double-acting self-adhesive hydraulic jacks 7 of the same type and specification between the bridge girder ...

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Abstract

The invention provides a three-level double-action self-attaching hydraulic jack. The hydraulic jack comprises an outer oil cylinder, a first-level piston cylinder, a second-level piston cylinder and a third-level piston cylinder which are sequentially connected in a sleeved manner, wherein an oil passage communicated to the second-level piston cylinder is arranged in the first-level piston cylinder, and a bidirectional pressure valve is disposed on the oil passage. The level-by-level jacking and automatic ordered return of the three-level double-action self-attaching hydraulic jack are reasonably controlled by reasonably setting the pressure value of the bidirectional pressure valve.

Description

technical field [0001] The invention relates to the technical field of hydraulic jacking, in particular to a three-stage double-acting self-fitting hydraulic jack. Background technique [0002] During the bridge jacking construction process, the traditional hydraulic jack is composed of cylinders, pistons, sealing rings, bases and hydraulic oil, etc., with a programmable logic controller (Programmable Logic Controller, PLC) system, balanced oil circuit distributor and high-pressure oil pipes , hydraulic oil single-acting oil pump and precise displacement monitoring device (displacement sensor) to realize the synchronous jacking and falling operation of the whole or partial components of the bridge. At present, the upper beam structure of most viaducts adopts hollow plate girder, box girder, channel beam and T-shaped plate beam, and the main structure of the supporting beam body is the cover beam, and rubber support is set between the beam body and the cover beam. The bridge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66F3/25
CPCB66F3/25
Inventor 蔡伟潘璇黄铭丰陈殷刘钧伟周丹王春晖余墩旻
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD