Automatic measuring system and method for axial and radial thermal expansion coefficients of rock sample
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A thermal expansion rate and measurement system technology, which is applied in the direction of material thermal expansion coefficient, can solve the problems of increasing the waste of manpower, reducing the measurement efficiency of rock thermal expansion coefficient, and not being able to realize automatic measurement.
Inactive Publication Date: 2021-03-16
GUIZHOU UNIV
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Problems solved by technology
At present, most of the devices used to test the thermal expansion coefficient are not suitable for measuring the thermal expansion coefficient of rocks. Some use non-contact measurement methods and use optical signals to measure, and the principle is complicated; some instruments use two samples for comparison. big error
In addition, automatic measurement cannot be realized, which reduces the measurement efficiency of rock thermal expansion coefficient and increases the waste of manpower to a certain extent.
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Embodiment 1
[0040] refer to figure 1 It is an overall layout diagram of an automatic measurement system for axial and radial thermal expansion rates of rock samples in the present invention. Specifically, the system includes: a control module 1 and a measurement device; the control module 1 can be a computer, a processor, etc. equipment.
[0041] The control system 1 includes a displacement sensor 4, a heating device 5, a displacement transmission rod 6, a temperature measuring thermocouple 7, a furnace wall 11, a top cover 12, and a base 3; wherein, the control module 1 and the displacement sensor 4, the heating device 5, and the temperature measuring The thermocouple 7 is connected to each other for measuring the axial and radial thermal expansion rates of the rock sample 10;
[0042] The rock sample 10 is arranged in the middle of the furnace wall 11, and a top cover 12 is arranged above the furnace wall 11. The furnace wall 11 and the top cover 12 are connected by bolts 9. The heatin...
Embodiment 2
[0060] Based on the automatic measurement system of the axial and radial thermal expansion rate of a kind of rock sample in embodiment 1, the automatic measurement method of the axial and radial thermal expansion rate of a kind of rock sample comprises the following steps:
[0061] S1: Place the rock sample to be tested in the middle of the furnace wall, adjust the displacement transmission rod so that one end of the displacement transmission rod is closely connected with the axial and radial directions of the rock sample, and the other end is connected with the displacement sensor;
[0062] In this embodiment, select a rock sample with a suitable shape, such as a cuboid, cylinder, regular polyhedron, etc., put the rock sample to be tested on the base, and place it in the middle of the furnace wall, select a displacement transmission rod with an appropriate length, and one end is in close contact The other end of the rock sample to be tested is connected to the displacement sen...
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Abstract
The invention provides an automatic measuring system and method for axial and radial thermal expansion coefficients of a rock sample. The system comprises a control module and a measuring device. Thecontrol system comprises a displacement sensor, a heating device, a displacement transmission rod, a temperature thermocouple, a furnace wall and a top cover; the control module is in signal connection with the displacement sensor, the heating device and the temperature thermocouple and is used for measuring the axial and radial thermal expansion rates of the rock sample; the rock sample is arranged in the middle of the furnace wall, the top cover is arranged above the furnace wall, the heating device is arranged on the side, facing the rock sample, of the furnace wall, and the temperature thermocouple penetrates the top cover. A displacement sensor is radially arranged on the furnace wall, and a displacement sensor is also longitudinally arranged on the top cover; one ends of partial displacement transmission rods are in close contact with the rock sample, and the other ends penetrate through the heating device and the furnace wall to be connected with displacement sensors; and the other ends of the displacement transmission rods penetrate through the top cover and are connected with the displacement sensor. The system can be used for measuring the axial and radial thermal expansion rates of a rock sample at different temperatures, and is simple in structure.
Description
technical field [0001] The invention belongs to the technical field of thermal expansion detection of rocks, and in particular relates to an automatic measurement system and method for axial and radial thermal expansion rates of rock samples. Background technique [0002] As the burial depth increases, the temperature of the formation also continues to increase. In the subway construction area using the shield method, the temperature between the cutter head and the rock formation is extremely high as the depth increases. In practice, geotechnical engineering is constantly involved in thermosolid coupling problems. It is extremely important to consider the law of mechanical properties of rocks under different temperatures, and the coefficient of thermal expansion of rocks is an important parameter in the study of this law. [0003] However, diagenesis is an extremely complicated process. Rocks are heterogeneous bodies composed of various minerals, and the thermal expansion co...
Claims
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Application Information
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