Force transfer capsule capable of realizing ultrahigh hydraulic loading

Abstract

The invention discloses a force transfer capsule capable of realizing ultrahigh hydraulic loading, which comprises a capsule body, and the capsule body is provided with an inwards turned skirt interface. The self-tightening sealing of the capsule body can be realized, and the sealing effect is better along with the increase of the loading pressure; particularly, the loading requirement of ultrahigh hydraulic pressure up to dozens of megapascals and even hundreds of megapascals can be met, the problem of flexible large load loading is ingeniously solved, and the loading pressure of the force transfer capsule is remarkably improved by dozens of times and even hundreds of times; besides, under the condition that the same hydraulic loading is realized, the size of the force transmission capsule can be easily miniaturized, and the true triaxial test device and the CT scanning technology can be more favorably combined; in addition, the force transfer capsule has the advantages of being simple in structure, easy to machine, good in sealing performance, convenient to use and the like.

Description

technical field [0001] The invention relates to a force transmission capsule, in particular to a force transmission capsule capable of realizing ultra-high hydraulic loading, and belongs to the technical field of rock mechanics test instruments. Background technique [0002] The force transmission capsule is a capsule made of high elastic rubber, which is used for flexible loading in a specific direction in a specific space. When used for hydraulic loading, one or more liquid inlet and outlet interfaces need to be provided on the capsule body. When the liquid with pressure enters the capsule body through the interface on the capsule body, the capsule body will be deformed under hydraulic pressure. When used for hydraulic loading, rigid constraints are usually imposed on the outside of the capsule body, allowing the capsule body to expand in only one direction or a few directions. Since the capsule body cannot be deformed in the direction of the rigid constraint, the deforma...

AI Technical Summary

Problems solved by technology

Since this sealed connection structure will generate a lot of stress locally, and there are obvious boundaries between the upper and lower gaskets and the capsule wall, so that the rubber wall at the interface of the capsule body will be sheared, therefore, in the liquid When the pressure reaches several MPa or even below one MPa, shear fracture may occur locally, so that the pressure cannot be increased any more.

That is to say, with the existing capsule body interface and its sealed connection structure with the external joint of the pressurized liquid, when the pressure in the capsule increases, the rubber at the capsule entrance will be partially squeezed by the high-pressure metal gasket. Pressure or shear, so it is easy to cause local rupture, leading to pressure leakage and loading failure, so that the liquid pressure in the capsule cannot be greatly increased, and the pressure loading of a few MPa can only be achieved at most, so that it has fallen into an application bottleneck

[0004] In addition, in the field of rock mechanics, the simulation test of rock under the true triaxial stress state has become a technical problem to be solved urgently in this field; especially, because CT scanning technology can realize the characterization of the microstructure inside the rock, it can accurately obtain Pore ​​structure is an effective method to reveal the seepage characteristics and mechanism of porous media without causing damage to the internal structure of the rock. Therefore, it has become the main research direction in this field to realize the combination of true triaxial test equipment and CT scanning technology. , and in order to realize the combination of true triaxial test device and CT scanning technology, it is first necessary to solve the problem that the transmission force capsule can realize ultra-high hydraulic pressure (such as: 30-100 MPa or even higher pressure) loading, but so far it has not been realized. The launch of force-transmitting capsule products loaded with ultra-high hydraulic pressure (up to tens of MPa, or even hundreds of MPa) and related technology reports

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