Multi-path high-accuracy hydraulic loading/unloading servo control system suitable for model test

Abstract

The invention discloses a multi-path high-accuracy hydraulic loading / unloading servo control system suitable for a model test, comprising a hydraulic station, a loading / unloading control system, a main oil path and at least one auxiliary oil path, wherein the hydraulic station is connected with the main oil path; the main oil path is connected with each auxiliary oil path via a connecting pipeline; each auxiliary oil path is connected with a flow division valve and a double-acting oil cylinder; the loading / unloading control system is connected with the control hydraulic station, the main oil path and each auxiliary oil path respectively; and the loading / unloading control system performs high-accuracy hydraulic loading / unloading servo control on the hydraulic station, the main oil path and each auxiliary oil path by operating computer software. The system uses a design of modularized auxiliary oil paths, the main oil path controls the pressure by using an electrohydraulic proportional overflow valve, and each auxiliary oil path realizes connection and disconnection with the main oil path, as well as the set pressure thereof by using a controllable electromagnetic check valve and a three-position four-way electromagnetic valve, thus realizing computer servo intelligent high-accuracy control for the loading and unloading of the model test.

Description

technical field [0001] The invention relates to a geotechnical engineering technology field such as mining, energy, hydropower, transportation, national defense, etc., and in particular to a multi-channel system suitable for model tests that realizes servo control of high-precision loading and unloading of models in similar model tests of geotechnical engineering. High-precision hydraulic loading and unloading servo control system. Background technique [0002] At present, in the underground engineering in the fields of hydropower, transportation, energy, resources and national defense engineering, with the increase of burial depth, the structure, mechanical properties and engineering response of the surrounding rock of the cavern appear under the condition of high ground stress. A series of new characteristic scientific phenomena such as zonal rupture, large deformation, and impact damage, for these characteristic scientific phenomena, on the one hand, it is necessary to re...

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Problems solved by technology

[0012] The purpose of the present invention is to solve the problem that the unloading step by step cannot be realized in the underground engineering model test existing in the prior art, and the loading and unloading accuracy and the long-term pressure holding effect are not ideal; to provide a multi-channel high-precision hydraulic pressure pump suitable for model tests Loading and unloading servo control system; Modularized oil circuit design is adopted, the total oil circuit adopts electro-hydraulic proportional relief valve to control the pressure, and each branch circuit adopts controllable electromagnetic one-way valve and three-position four-way solenoid valve to realize the connection with the total oil circuit. The connection and disconnection of each branch realize the set pressure of each oil circuit, and realize the computer servo intelligent high-precision control of loading and unloading of the model test

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