Fiber Bragg grating leading wire outlet sealing apparatus of high-confining-pressure pressure chamber
A fiber grating and sealing device technology, which is applied in the field of pressure chamber sealing and sealing devices, can solve the problems that the sealing device cannot be reused, the fiber grating is easy to break, and the fiber grating protection is easy to obtain, the damage is small, and the sealing performance is improved. Effect
Inactive Publication Date: 2015-08-05
SUN YAT SEN UNIV
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Problems solved by technology
[0002] In the existing pressure chamber, especially in the pressure chamber of the triaxial compression tester, the overall sealing device technology for the outlet of ordinary sensor wires with oil pressure as the confining pressure condition has been very mature. The brittle characteristics and the sealing device of the lead wire outlet of brittle materials with high requirements for bending are still a difficult problem, especially the sealing of the lead wire outlet of the fiber grating in the high confining pressure triaxial compression test
In the existing sealing device, the selected sealing material is difficult to protect the brittle fiber grating under high pressure environment. At the same time, the sealing device cannot be reused, which increases the cost of the experiment
Method used
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[0017] The A step of the sealing device is glued together with the upper surface of the pressure chamber bearing platform G by applying elastic and hydrophobic sealant C on the A-2 surface. The A step of the sealing device is a flat hollow cylinder, which is pressed with a heavy object On the A-1 surface of the sealing device A step, make the A-1 surface closely adhere to the upper surface of the bearing platform G, and apply sealant C on the side of the flat cylinder A step, and the B step of the sealing device is a long hollow cylinder as a whole Body, use manual extrusion to squeeze the B step into the fiber grating lead hole H of the pressure chamber platform G, so that the B-1 and B-2 surfaces of the sealing rubber and the I-1 and I of the fiber grating lead hole -2 sides fit snugly. The inner hollow cylindrical through hole E of the sealing device is used to accommodate the fiber grating D, and sealant C is applied near the junction F between the A-1 surface of the seali...
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The invention belongs to a pressure chamber sealing apparatus and especially relates to a fiber Bragg grating leading wire outlet sealing apparatus of a high-confining-pressure pressure chamber used in tri-axial compression test. The apparatus is characterized by being composed of T-shaped sealing rubber and sealant. By means of reasonable design of a conical structure of the bottom of the sealing rubber and smart utilization of the sealant, a sealing problem at a fiber Bragg grating leading wire outlet of the high-confining-pressure pressure chamber is effectively solved. The apparatus is suitable for sealing the fiber Bragg grating leading wire outlet of the high-confining-pressure pressure chamber and is simple in manufacturing process, is made from materials being easy to obtain and can be repeatedly used, is quite less in damage on a bearing bench in the pressure chamber, is strong in adaptability and is excellent in popularization value.
Description
technical field [0001] The invention belongs to a sealing device for sealing a pressure chamber, in particular to a sealing device for the outlet of an optical fiber grating lead wire in a high confining pressure chamber in a triaxial compression test, and is suitable for sealing the outlet of an optical fiber grating lead wire in a high confining pressure chamber. technical background [0002] In the existing pressure chambers, especially in the pressure chambers of triaxial compression testers, the overall sealing device technology for the outlet of ordinary sensor wires with oil pressure as the confining pressure condition has been very mature. The brittle characteristics and the sealing device of the outlet of the brittle material with high requirements on the bending degree are still difficult problems, especially the sealing of the outlet of the fiber grating in the high confining pressure triaxial compression test. In the existing sealing device, the selected sealing ...
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IPC IPC(8): G01N3/02
Inventor 周翠英易成城刘镇
Owner SUN YAT SEN UNIV