High-low pump combination hydraulic system

A technology of hydraulic system and high and low pressure pump, applied in the field of combined hydraulic system of high and low pressure pump, can solve the problems of single traveling speed, poor compression effect, low efficiency, etc., to improve work efficiency, increase speed and pressure adjustment range, and ensure tightness The effect of cable construction quality

Active Publication Date: 2008-05-14
CCCC SECOND HIGHWAY ENG CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydraulic system of the main cable tightening machine of the suspension bridge that has been built in China generally uses a hydraulic pump and several jacks in parallel, so its traveling speed is single, the efficiency is low, and the tightening effect is poor.

Method used

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  • High-low pump combination hydraulic system

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Embodiment Construction

[0012] In Figure 1, the new high-low pressure pump combined hydraulic system is the power part of the main cable tightening machine. It includes a hydraulic pump station 13 placed in a hydraulic oil tank 15, an operating table 14, a vertical jack 8, a horizontal jack 9, and a hydraulic pump station. 13 is connected with the operating table 14 by pipeline, and the operating table 14 is connected with the vertical jack 8 and the horizontal jack 9 through the quick-change joint 10 and the hydraulic hose 11 respectively. The hydraulic pump station 13 includes two sets of hydraulic units consisting of a high-pressure pump 1, a low-pressure pump 2, a high-pressure relief valve 4, and a low-pressure relief valve 3. The high-pressure pump 1 in each set of hydraulic units is connected to the high-pressure relief valve 4, and the low-pressure pump 2 It is connected with the low pressure relief valve 3 , and the low pressure pump 2 is connected with the high pressure pump 1 through the hy...

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Abstract

The invention relates to a combination hydraulic system of high-low pressure pumps, in particular to a combination hydraulic system of high-low pressure pumps used for tight rope equipment in the construction of a main cable and a tight rope of a suspension bridge. The invention is characterized in that an operation platform (14) is connected with a vertical jack (8) and a level jack (9); a hydraulic pump station (13) comprises two sets of hydraulic units consisting of a high pressure pump (1), a low pressure pump (2), a high pressure overflow valve (4) and a low pressure overflow valve (3); the high pressure pump (1) of each hydraulic unit is connected with the high pressure overflow valve (4); the low pressure pump (2) is connected with the low pressure overflow valve (3); the low pressure pump (2) is connected with the high pressure pump (1) through an one-way hydraulic control valve (12). The invention has the advantages of good tightening effect, high efficiency, leading the main cable to be uniformly forced within and outside, and ensuring porosity of the main cable to meet design requirements, thus realizing the purpose of high efficiency and quality tightening operation.

Description

technical field [0001] The invention relates to a combined hydraulic system of high and low pressure pumps, in particular to a combined hydraulic system of high and low pressure pumps used in cable tightening equipment in the construction of main cable tightening of suspension bridges. Background technique [0002] With the rapid development of infrastructure such as highway transportation in my country, as the suspension bridge with the strongest spanning ability, it has gradually become one of the preferred bridge types for cross-river and cross-sea passages. The main cable of a suspension bridge is the main load-bearing structure of the suspension bridge, which is generally composed of dozens or hundreds of prefabricated parallel wire bundles (PWS commonly known as cable strands). The apparent diameter is much larger than the required diameter. In order to carry out the subsequent engineering construction smoothly, it is necessary to tighten the main cable section into a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D11/02F15B11/16
Inventor 张腾
Owner CCCC SECOND HIGHWAY ENG CO LTD
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