Non-outflow type gas pressure/volume control device

A volume control and gas pressure technology, applied in liquid/fluid solid measurement, measurement device, optical device, etc., can solve problems such as sealing of moving parts, and achieve the effect of preventing leakage, high measurement accuracy and good economy.

Inactive Publication Date: 2012-09-05
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to solve the problem of sealing of moving parts, realize the control of gas pressure and the detection of gas volume change

Method used

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  • Non-outflow type gas pressure/volume control device
  • Non-outflow type gas pressure/volume control device
  • Non-outflow type gas pressure/volume control device

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Embodiment Construction

[0015] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0016] as attached Figure 1~4 As shown, the parts are cleaned with kerosene during assembly, and the mating surface is oiled after drying. The unprocessed surface of each part should be cleaned, the burrs should be removed, and the anti-rust paint should be dipped; When the deceleration servo motor 36 of the cylinder 31 is in operation, the leading screw of the ball screw 14 is driven to rotate. Since the push plate 19 connected to the rear end of the nut is connected with the grating ruler 13 through the connecting rod 17, the push plate 19 will move linearly, thereby driving The main cylinder piston rod 7 fixed on the lower side of the baffle moves, so that the main cylinder piston 5 moves, compresses the gas in the main cylinder 31, and generates pressure; at the same time, the deceleration servo motor 36 of the...

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Abstract

The invention discloses a non-outflow type gas pressure / volume control device, in particular to a device for controlling gas pressure and detecting volume change, which belongs to the technical field of mechanical-engineering testing and relates to a soil-mechanical triaxial test. The non-outflow type gas pressure / volume control device is characterized by comprising a pair of reducing servo motors, a ball screw, a main cylinder, a pressure retaining cylinder, a gas pressure transducer, a linear scale, a monitoring and controlling unit, and the like. In the device, a tiny cavity is formed at the position of a piston of the main cylinder by using a piston baffle, and the cavity and the pressure cavities of the cylinders are filled with air with equal pressure so as to make the pressure difference between the two ends of the piston very small, thereby realizing 'zero leakage' in theory and solving the problem of gas leakage well; and the linear displacement of the piston of the main cylinder is measured by a displacement transducer of the linear scale so as to calculate the change of gas volume in the cylinder and realize the detection on the volume of constant pressure gas adsorbed in soil samples. The device has the advantages of realizing 'zero leakage' in theory, along with light structure, low cost and reasonable overall design.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering testing, and relates to a triaxial test of soil mechanics, in particular to a device for gas pressure control and volume change detection. Background technique [0002] To measure the strength and deformation of soils a triaxial tester is often used, which is widely used and can be used to measure a variety of parameters including shear strength properties, consolidation characteristics and soil permeability. Its main functional equipment includes the control of principal stress, drainage control and measurement of pore pressure. The gas pressure / volume control device is an important part of the triaxial experimental system. In general, it takes more than ten hours or even several days to complete an experiment. On the one hand, it is necessary to keep the pressure of the gas pressure / volume control device stable, and on the other hand, it is necessary to detect the volume of the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/02G01F22/02G01B11/00
Inventor 桑勇邵龙潭刘阳冯忠帅
Owner DALIAN UNIV OF TECH
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