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Sample heating apparatus used for rock impact experiment

A technology of impact experiment and heating device, which is applied in the direction of using one-time impact force to test the strength of materials and the preparation of test samples. It can solve the problems of large difference in intermediate temperature and rapid drop, and prevent damage and breakdown. The effect of high-speed impact and heat loss prevention

Active Publication Date: 2009-04-08
CENT SOUTH UNIV
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Problems solved by technology

This method has two disadvantages: First, the temperature of the sample drops rapidly after it is taken out of the high-temperature furnace. When the impact test is performed, the temperature of the sample is no longer the temperature measured in the heating furnace, and the temperature of the sample needs to be corrected before the results can be used. ; Second, in the process of contacting the incident rod, the transmission rod and the sample, due to the strong thermal conductivity of the incident rod, the transmission rod and the sample, the temperature difference between the two ends and the middle of the sample is relatively large

Method used

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  • Sample heating apparatus used for rock impact experiment
  • Sample heating apparatus used for rock impact experiment
  • Sample heating apparatus used for rock impact experiment

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] See Figure 2, Figure 3 and Figure 4 , the structure of the heating device 7 is: the support 13 is provided with a thermal insulation bin 19, and the axial level in the thermal insulation bin 19 is provided with a carbon fiber reinforced alloy cylinder 18, and a heating chamber 17 is formed in the carbon fiber reinforced alloy cylinder 18, and the carbon fiber reinforced alloy cylinder 18 There is a resistance wire 11 on it, and the resistance wire 11 is electrically connected with the heating chamber temperature monitoring and control instrument 27 through the power switch 14. The heating chamber temperature monitoring and control instrument 27 is electrically connected with a thermocouple 26, and a heating The two ports of the chamber 17 correspond to the adjustable heat preservation door 15 respectively. The adjustable heat preservatio...

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Abstract

The invention provides a sample heating apparatus used for a rock impact experiments as rock SHB and combined static-dynamic load and the like. and belongs to the rock mechanics study field. The apparatus comprises an adjusting slideway (9), a locating bolt (10), a resistance wire (11), leveling bolts (12), a bracket (13), a power-supply switch (14), an adjustable insulation bin-door (15), a thermocouple access hole (16), a heating cavity (17), a carbon-fiber reinforced alloy cylinder (18) and an insulation bin (19). The invention adopts the anti-impact and anti-high-temperature carbon-fiber reinforced alloy cylinder, the adjustable insulation bin-door and four leveling bolts at the seat of the apparatus to realize the synchronous processes of preserving the constant high temperature and the loading of impact stress wave during the rock impact experiment. The invention provides a special experimental apparatus for the further rock mechanics study.

Description

technical field [0001] The invention relates to a sample heating device, in particular to a sample heating device for rock impact experiments. technical background [0002] In the process of resource extraction, rock drilling and blasting are widely used to break rocks, which requires mastering the dynamic mechanical behavior of rocks. These mechanical behaviors are usually obtained by carrying out various impact experiments in the laboratory. At present, the impact test system that is widely used and the results are relatively reliable is the SHB (Split Hopkinson Bar) device, and various deformation devices (such as rock Dynamic and static combined loading experimental device, national invention patent ZL200510032031.6). [0003] In traditional SHB tests, rock samples are often carried out at room temperature. However, as the depth of resource exploitation continues to increase, the geothermal gradient increases by 3 degrees Celsius per 100 meters. When the depth is carri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/44G01N3/30
Inventor 李夕兵周子龙尹土兵高科
Owner CENT SOUTH UNIV
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