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Transfiguration air box

A gas-holding and gas-box technology, which is used in measurement devices, analysis of suspensions and porous materials, instruments, etc., can solve the problems of low permeability coefficients that cannot be measured by variable volume containers, and achieves reduction of test costs and complexity, and fast time measurement. , Economical effect

Inactive Publication Date: 2009-08-12
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings and deficiencies that the variable volume vessel in the original variable volume pulse method device cannot measure the low permeability coefficient. Variation Vessel in Experimental Device for Measuring Rock Fluid Permeability Coefficient by Pulse Method

Method used

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Embodiment Construction

[0039] Below in conjunction with accompanying drawing and implementation example the present invention is further described:

[0040] 1. The structure of each component

[0041] 1. Lining 13

[0042] according to figure 1 , figure 2 , Figure 4 and Figure 5 As shown, it can be seen that the inner liner 13 is arranged inside the outer cylinder 12 of the air box part 10, and is closely attached to the inner wall of the outer cylinder 12, completely fitting without gaps. The inner liner 13 and the disc surface of the piston head 21 and the sealing ring 22 on the side form an airtight air chamber 14 . Liner 13 is made of a kind of high sliding property, non-stick, wear-resistant, pressure-resistant, heat-resistant, corrosion-resistant material such as figure 2 The cylindrical member shown. The inner lining 13 is a cylindrical lining made of high sliding and pressure-resistant materials. The inner liner 13 is made by a general pressure vessel forming method (all those sk...

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Abstract

The invention discloses a variable volume air box, which consists of an air box, a piston and a reading part. An inlet / outlet is arranged in the front of an outer cylinder; the inner side of the outer cylinder is stuck with an liner; the liner and a piston head are surrounded into an air cavity; a cover plate is connected with the outer cylinder through a bolt; and a locking device is arranged at the side of the cover plate. The front half part of a piston part is placed in the air box; a sealing ring is embedded in a groove at the side of a circular plate of the piston head; and the front end of a piston shaft is inserted into a bearing and inserted into the center of the rear end of the piston head along the bearing together so as to seal the piston head. The tail end of a high-precision screw rod is inserted into a base; and a knob is inserted into the rear end of the base. A support sleeve is sleeved outside the piston shaft; the front end is embedded in the rear end of the cover plate of the air box part; a fixing sleeve is tightly sleeved outside of the supporting sleeve and is fixed on the supporting sleeve by a dowel; the front end face of a micro-drum clings to the fixing sleeve; and the rear end face of the micro-drum clings to the base. The variable volume air box has simple operation, convenient reading, a stable device, high precision of constrictive reading of the air cavity and wide measuring range, has high testing speed for measuring a low-permeability test piece and improves the measuring precision.

Description

technical field [0001] The present invention relates to a variable volume air box, more particularly to a variable volume container in an experimental device for measuring the permeability coefficient of rock fluid by a variable volume pressure pulse method; it is especially suitable for low-permeability and impermeable rocks (such as mudstone, rock salt, etc.) Fast and accurate measurement of fluid permeability coefficient changes over a wide range. Background technique [0002] Permeability is an important property of porous and fractured media. In recent years, due to the safety evaluation of oil and gas underground storage and compressed air energy storage projects, it is necessary to study the permeability changes of rock salt and mudstone in the process of deformation and failure under cyclic loading. This puts forward very high requirements on the permeability coefficient measuring device: 1. It can measure low permeability coefficient (as low as 10 -22 m 2 ); 2. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/10G01N15/08
Inventor 李小春王颖魏宁
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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