HCZ type drilling conservator stress gauge pressurization type

  HCZ type drilling conservator stress gauge pressurized 1、 Precautions: 1
Please fill up the hydraulic oil before use; 2
When in use, both ends of the copper tube shall not be bent 2、 Overview: HCZ type borehole conservator stress gauge is used to measure the relative pressure at different depths in the coal and rock body under the coal mine, as well as the advance pressure and coal pillar pressure of the mining face
The product has the advantages of simple structure, small volume, light weight, easy operation, intuitive pressure display on the pressure gauge and reliable quality
Note: when placing the conservator stress gauge in the borehole, the pressure bearing end face (i
e
the side with oblique key strip on the oil box) must be placed in the direction of measured pressure 3、 Main technical parameters of HCZ drilling conservator stress gauge: measurement range: 0 & mdash; 25/40/60MPa； Accuracy: grade 2
5; Oil conservator diameter: 40mm (chamfered in front of metal manufacturing) oil conservator length: no less than 200mm total length of oil conservator stress gauge: 7m (appropriately increased according to user needs) display mode: pressure gauge (oil pressure) pointer display hydraulic pipe material: copper pipe or iron pipe (pressure above 60MPa) technical standard specification: in line with relevant regulations of coal industry, the pressure interface can be connected with? 10 international high pressure pipe connection 4、 Advantages of HCZ drilling conservator stress gauge: A
simple structure B: small volume C: light weight D: easy operation e: intuitive pressure display of pressure gauge f: Reliable quality 5、 Working principle of drilling oil pressure conservator stress gauge: Oil conservator oil conservator stress gauge is a kind of hydraulic sensing element
In the surrounding rock of the shaft wall to be measured, use an air drill to drill a hole with a diameter of 50mm, and the hole depth shall be determined according to the requirements
The embedding method is the same as that of small strain gauge
After dry consolidation, pressurize to the original stress state
During observation, read out the pressure value and its difference from the initial pressure from the pressure gauge, and then convert the stress value with the calibration curve
In the surrounding rock of the shaft wall to be measured, use an air drill to drill a hole with a diameter of 50mm, and the hole depth shall be determined according to the requirements
The embedding method is the same as that of small strain gauge
After dry consolidation, pressurize to the original stress state
During observation, read out the pressure value and its difference from the initial pressure from the pressure gauge, and then convert the stress value with the calibration curve 6、 Installation instructions of drilling conservator stress gauge Firstly, clean the drilling hole, place the instrument at the measuring position, and its stress surface is perpendicular to the direction of the stress to be measured
Push the circular hydraulic pillow forward as much as possible to make the semicircular stress block contact with the drilling wall, and pour the fast cement into the drilling hole with a certain initial installation stress