Ultra-low permeability measurer adopting sine pressure wave oscillation method
An ultra-low permeability, pressure wave technology, applied in permeability/surface area analysis, measurement devices, scientific instruments, etc., can solve problems such as long pressure pulse balance time, environmental factors, and no core holder design, and achieve Easy and fast loading and unloading
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[0041] Such as figure 1 As shown, the sine pressure wave oscillation method ultra-low permeability tester of the present invention includes a triaxial pressure core holder (2), a columnar core (3), a sine pressure wave generator (4), and a vacuum pump system (5). ), base pressure booster pump (6), ring pressure / axial pressure booster pump (7), microcomputer (8) and fixed value container (9),
[0042] The triaxial pressure core holder includes a floating plug (2-1), a fixed plug (2-2), a piston (2-3), a pressure cap (2-4), a rubber sleeve (3- 1) and the steel sleeve (3-2), the floating plug (2-1) and the fixed plug (2-2) are respectively fixed on the piston (2-3) and the pressure cap through a quick bayonet connection form On (2-4), the outlet of the floating plug (2-1) and the outlet of the fixed plug (2-2) are connected through a pipeline, and a ball valve (11) is connected in series in the middle;
[0043] The floating plug (2-1) of the triaxial pressure core holder (2) has a sm...
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