CN211856208U - Industrial CT machine matched dynamic and static combined loading rock fracture characterization test device - Google Patents
Industrial CT machine matched dynamic and static combined loading rock fracture characterization test device Download PDFInfo
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- CN211856208U CN211856208U CN202020315223.8U CN202020315223U CN211856208U CN 211856208 U CN211856208 U CN 211856208U CN 202020315223 U CN202020315223 U CN 202020315223U CN 211856208 U CN211856208 U CN 211856208U
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Abstract
The utility model provides a supporting sound combination loading rock rupture sign test device of industry CT belongs to ground mechanics technical field. The device comprises an axial compression system, a confining pressure system, a rotating system and a scanning system. The axial pressure system realizes axial dynamic and static combined stress disturbance loading on a sample, the confining pressure system applies confining pressure on the sample, the rotary system drives the testing machine to rotate through the rotary table, and the scanning system obtains the absorption coefficient of a scanned object through scanning at different angles to perform three-dimensional imaging. The utility model discloses utilize industry CT scanning technique, survey in real time the rock and at the microscopical damage and the dynamic evolution process that breaks under the disturbance of sound combination stress, carry out visual, digital sign to the evolution process that breaks of rock. The utility model discloses well pressure chamber adopts the special material carbon fiber, has the little advantage of intensity height, density, has improved the ray energy attenuation condition when X ray passes the pressure chamber under satisfying the functional requirement to pressure chamber triaxial cylinder wall bears the loading reaction force.
Description
Technical Field
The utility model relates to a ground mechanics technical field especially indicates a supporting sound combination loading rock rupture characterization test device of industry CT.
Background
With the reduction of shallow mineral resources, more and more metal mines tend to develop deep. The deep hard rock mine has large ground stress and high energy storage, and because the buried depth span is large, in order to ensure the mining intensity, the multi-middle-section multi-chamber simultaneous operation is generally carried out, underground chambers are overlapped layer by layer, and various ore removal, excavation and blasting operations are continuous. In a deep stope, a thick ore body is mined out along with ore collapse of large explosive amount, and high-stress surrounding rocks and a large-area dead zone are left. As the balance state of the original rock is broken, the internal stress transfer, crack propagation and instability damage of the surrounding rock are abnormally active. In addition, from the analysis of stress, the ore falling of any stope and the engineering excavation disturbance thereof can cause the stress redistribution of the whole mining system, the dynamic process can also cause the change of the stored energy of the rock mass, and a series of dynamic disasters such as rock caving, even rock burst and the like are easily induced. The deep rock is in a three-dimensional static stress action state before mining (excavation), and mining and excavation activities can be regarded as dynamic disturbance relative to the initial static state of the deep rock, so that the deep rock essentially always bears the dynamic and static combined load action in the mining activities. Therefore, the research on the microscopic damage and dynamic fracture evolution process of the rock under the dynamic and static combined load has great significance.
The macroscopic deformation failure mechanism of the rock under the stress action can be obtained through a triaxial test, but the triaxial test can only obtain the failure state of the rock sample after the test is finished, and the fracture evolution process of the rock cannot be observed in real time. At present, the industrial CT scanning technology provides an effective experimental technical means for researching the internal structure of a material, and the industrial CT can utilize X rays to penetrate through the cross section of an object to carry out rotary scanning and realize the reconstruction of an internal image by means of a high-performance computer system. Therefore, the industrial CT scanning technology becomes an important means for researching the mesoscopic damage and dynamic fracture evolution process of the rock under the dynamic and static combined load, and the technical key lies in researching and developing a dynamic and static combined loading rock dynamic fracture visual characterization test device and a test method matched with an industrial CT machine.
Based on the requirements, the dynamic and static combined loading rock dynamic fracture visual characterization test device and method matched with the industrial CT machine are invented, the mesoscopic damage and dynamic fracture evolution process of the rock under dynamic and static combined stress disturbance is observed in real time by utilizing the industrial CT scanning technology, the fracture evolution process of the rock is visually and digitally characterized, and theoretical support is provided for the stability of the rock during deep mining of a mine.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a supporting sound combination loading rock rupture characterization test device of industry CT, this test device and experimental method main function are the dynamic disturbance of simulation to the rock sample, promptly under sound combination load experimental condition, obtain rock sample mesoscopic damage and dynamic rupture evolution process under sound combination stress disturbance in real time through industry CT scanning technique, this test device and experimental method also can carry out under the conventional triaxial test mesoscopic damage and the dynamic rupture evolution process that obtain the rock in real time through industry CT scanning technique simultaneously.
The device comprises a testing machine base, an axial compression system, a confining pressure system, a rotating system and a scanning system, wherein the axial compression system comprises an upper oil cylinder rigid body, an upper oil cylinder upper cover, an upper oil cylinder lower cover connecting plate, an upper oil cylinder piston, a lower oil cylinder lower cover, a lower oil cylinder upper cover connecting plate, a lower oil cylinder barrel, a lower oil cylinder rigid body and a lower oil cylinder piston, the confining pressure system comprises a pressure chamber, a built-in pressure sensor, an external pressure sensor, an upper pressure head, a lower pressure head, a lifting oil cylinder lifting rod, a lifting oil cylinder base and a lifting oil cylinder cross beam, the rotating system comprises a rotary table, an upper rotating slip ring stator, an upper rotating slip ring rotor, a lower rotating slip ring stator and a lower rotating slip ring rotor, and the scanning system comprises an X-ray transmitter, an X-ray detector, a transmission motor, a transmission speed reducer, a transmission motor.
The testing machine is characterized in that the turntable is arranged on a base of the testing machine and is connected with a lower rotating slip ring rotor through a lower rotating slip ring stator, the turntable is connected with a lower oil cylinder lower cover, the lower oil cylinder lower part is arranged on the lower oil cylinder lower cover, a lower oil cylinder upper cover connecting plate is arranged on the upper part of the lower oil cylinder, a pressure chamber is arranged on the upper part of the lower oil cylinder upper cover connecting plate, a lower pressure head is arranged on the lower part of the pressure chamber, an upper pressure head is correspondingly arranged on the upper part of the lower pressure head, an upper oil cylinder rigid body is arranged on the upper part of the pressure chamber, the lower part of the upper oil cylinder rigid body is an upper oil cylinder lower cover connecting plate, the upper part.
The lower part in the lower oil cylinder barrel is provided with a lower oil cylinder piston, the upper part is provided with a pressure chamber piston, and an upper oil cylinder piston is arranged in the upper oil cylinder rigid body.
An external pressure sensor is arranged outside the lower oil cylinder barrel, and an internal pressure sensor is arranged above the inside of the pressure chamber.
The sample is placed between the upper pressure head and the lower pressure head.
The lifting oil cylinder base is connected with a lifting oil cylinder cross beam through a lifting oil cylinder lifting rod and stretches over the testing machine base, a hole is reserved in the middle of the lifting oil cylinder cross beam, and the upper rotating slip ring rotor is installed in the hole.
The testing machine base is arranged on the sizing block, two ends of the sizing block are respectively provided with a vertical frame, namely a vertical frame I and a vertical frame II, the X-ray transmitter is installed on the vertical frame I through a transmission lead screw, the X-ray detector is installed on the vertical frame II, the vertical frame I is provided with a transmission motor, the transmission motor is installed on a transmission motor base through a transmission speed reducer, and the lower part of the transmission lead screw is connected with a transmission bearing seat.
The pressure chamber is made of carbon fiber, and flanges are arranged at two ends of the pressure chamber and are used for being connected with an upper oil cylinder lower cover connecting plate and a lower oil cylinder upper cover connecting plate.
The method for applying the test device comprises the following steps:
s1: preparing a rock sample, and wrapping the rock sample by using a transparent plastic tube for testing;
s2: starting a lifting oil cylinder, enabling a lifting rod of the lifting oil cylinder to drive a pressure chamber and an upper structure to rise, then installing a sample, enabling the lifting rod of the lifting oil cylinder to descend after the sample is installed, and enabling the lifting rod of the lifting oil cylinder to be stably connected with a rotary table through a bottom connecting piece, so that the axis line of the sample is aligned with the axis lines of an upper pressure head and a lower pressure head of the pressure chamber;
s3: checking the upper device of the rotary table to determine that the fixation is good;
s4: closing a main power supply of the power distribution cabinet, and electrifying each system;
s5: starting the X-ray machine, selecting a preheating mode according to the time length of the last shutdown and the present shutdown, preheating, and simultaneously starting a computer system;
s6: setting rock sample information, selecting or modifying scanning parameters on a computer system control station;
s7: when scanning starts, the X-ray machine emits beams, the detector receives signals, the scanning device subsystem completes various required motions, and the scanning control subsystem performs real-time control;
s8: opening a control valve of the supercharger, filling nitrogen in the supercharger into the pressure chamber along a reserved air guide pipe, applying confining pressure on the sample, and closing the control valve of the supercharger when the confining pressure reaches a pressure value set by a test;
s9: starting the testing machine, and feeding oil to the upper oil cylinder and the lower oil cylinder to apply dynamic load to the sample;
s10: scanning at different stages of the rock disturbed by fatigue, wherein a mechanical loading test must be stopped when CT scanning imaging is carried out, an X-ray machine emits beams when scanning at each stage, a detector receives signals, a scanning device subsystem finishes various required movements, and a scanning control subsystem carries out real-time control to obtain CT images at different stages; when scanning is finished each time, stopping the X-ray machine to emit beams, and stopping the motion of each device of the subsystem of the scanning device;
s11: checking the obtained CT image, positioning the defect height on the image when a suspicious defect is found on the image, and carrying out CT scanning reconstruction or secondary experiment on the specified detection height;
s12: closing the radioactive source of the CT machine, unloading the horizontal loading device and the vertical loading device, dismantling the sample and ending the test;
s13: the above-mentioned S2-S12 are CT scan tests under the condition of once dynamic and static combined cyclic loading, repeat S2-S12, carry on the test many times;
s14: and analyzing the obtained test data, acquiring a crack evolution process of the rock in a deformation and damage process under dynamic and static combined load, performing three-dimensional reconstruction, damage evolution description and damage variable analysis on the sample cracks, and realizing visualization and digital representation of the rock fracture process under dynamic and static combined stress disturbance.
The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:
in the scheme, the mesoscopic damage and dynamic fracture evolution process of the rock under the dynamic and static combined stress disturbance is observed in real time by utilizing an industrial CT scanning technology, and the fracture evolution process of the rock is visually and digitally represented. The upper pressure head and the lower pressure head of the sample rotate accurately and synchronously, so that the sample is not influenced by any torque when being loaded. The pressure chamber is made of special materials, such as carbon fibers, has the advantages of high strength and low density, improves the ray energy attenuation condition when X rays pass through the pressure chamber under the condition of meeting the functional requirements, and the triaxial cylinder wall of the pressure chamber bears the loading reaction force.
Drawings
FIG. 1 is a schematic structural diagram of the whole system of the dynamic and static combined loading rock fracture characterization test device matched with the industrial CT machine of the present invention;
FIG. 2 is a schematic structural view of the dynamic and static combined loading rock fracture characterization test device matched with the industrial CT machine of the present invention;
FIG. 3 is a schematic view of an industrial CT assembly structure of the present invention;
fig. 4 is a schematic structural view of the pressure chamber of the present invention;
fig. 5 is the structural schematic diagram of the lift cylinder of the confining pressure system of the present invention.
Wherein: 1-tester base; 2-oil cylinder discharging; 3, lower oil cylinder lower cover; 4-lower cylinder piston; 5, connecting a lower cover of the upper oil cylinder; 6-connecting plate of upper cover of lower oil cylinder; 7-a pressure chamber; 8-pressure chamber piston; 9-built-in pressure sensor; 10-upper cylinder piston; 11-applying a cylinder rigid body; 12-mounting an upper cover of the oil cylinder; 13-upper rotating slip ring stator; 14-upper rotating slip ring rotor; 15-a turntable; 16-external pressure sensor; 17-lower rotating slip ring stator; 18-lower rotating slip ring rotor; 19-an upper pressure head; 20-pressing head; 21-sample; 22-lifting the cylinder base; 23-lifting the oil cylinder lifting rod; 24-lifting the cylinder beam; 25-sizing block; 26-an X-ray transmitter; 27-a vertical frame I; 28-a vertical frame II; 29-a drive motor; 30-a transmission motor base; 31-a transmission reducer; 32-a drive screw; 33-a transmission bearing seat; 34-X-ray detector.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The utility model provides a supporting sound combination loading rock rupture sign test device of industry CT.
As shown in figures 1 and 2, the device comprises a tester base 1, an axial compression system, a confining pressure system, a rotating system and a scanning system, wherein the axial compression system comprises an upper cylinder rigid body 11, an upper cylinder upper cover 12, an upper cylinder lower cover connecting plate 5, an upper cylinder piston 10, a lower cylinder lower cover 3, a lower cylinder upper cover connecting plate 6, a lower cylinder barrel 2, a lower cylinder rigid body and a lower cylinder piston 4, the confining pressure system comprises a pressure chamber 7, an internal pressure sensor 9, an external pressure sensor 16, an upper pressure head 19, a lower pressure head 20, a lifting cylinder lifting rod 23, a lifting cylinder base 22 and a lifting cylinder cross beam 24, the rotating system comprises a rotary table 15, an upper rotating slip ring stator 13, an upper rotating slip ring rotor 14, a lower rotating slip ring stator 17 and a lower rotating slip ring rotor 18, and the scanning system comprises an X-ray emitter 26, an X-ray detector 34, a transmission motor 29 and a transmission speed reducer 31, The device comprises a transmission motor base 30, a transmission bearing seat 33, a transmission lead screw 32, a sizing block 25 and a vertical frame.
The rotary table 15 is arranged on the testing machine base 1 and is connected with the lower rotary slip ring rotor 18 through the lower rotary slip ring stator 17, the rotary table 15 is connected with the lower oil cylinder lower cover 3, the lower oil cylinder lower cover 3 is arranged on the lower part of the lower oil cylinder 2, the lower oil cylinder upper cover connecting plate 6 is arranged on the upper part of the lower oil cylinder 2, the upper part of the lower oil cylinder upper cover connecting plate 6 is a pressure chamber 7, the lower part of the pressure chamber 7 is provided with a lower pressure head 20, an upper pressure head 19 is correspondingly arranged above the lower pressure head 20, an upper oil cylinder rigid body 11 is arranged above the pressure chamber 7, the lower part of the upper oil cylinder rigid body 11 is provided with an upper oil cylinder lower cover connecting plate 5, the upper part of the upper oil cylinder rigid body 11 is an upper oil cylinder upper.
The lower part in the lower oil cylinder barrel 2 is provided with a lower oil cylinder piston 4, the upper part is provided with a pressure chamber piston 8, and an upper oil cylinder piston 10 is arranged in an upper oil cylinder rigid body 11.
An external pressure sensor 16 is arranged outside the lower oil cylinder barrel 2, and as shown in fig. 4, an internal pressure sensor 9 is arranged above the inside of the pressure chamber 7.
Between the upper ram 19 and the lower ram 20, a sample 21 is placed.
As shown in fig. 5, the lifting cylinder base 22 is connected with a lifting cylinder beam 24 through a lifting cylinder lifting rod 23, and spans over the tester base 1, a hole is reserved in the middle of the lifting cylinder beam 24, and the upper rotating slip ring rotor 14 is installed in the hole.
As shown in fig. 1 and 3, the tester base 1 is arranged on a sizing block 25, two ends of the sizing block 25 are respectively provided with a vertical frame, namely a vertical frame I27 and a vertical frame II 28, the X-ray transmitter 26 is arranged on the vertical frame I27 through a transmission lead screw 32, the X-ray detector 34 is arranged on the vertical frame II 28, the vertical frame I27 is provided with a transmission motor 29, the transmission motor 29 is arranged on a transmission motor base 30 through a transmission speed reducer 31, and the lower part of the transmission lead screw 32 is connected with a transmission bearing base 33.
The pressure chamber 7 is made of carbon fiber, and flanges are arranged at two ends of the pressure chamber 7 and are used for being connected with the upper oil cylinder lower cover connecting plate 5 and the lower oil cylinder upper cover connecting plate 6.
In the specific design, the lower oil cylinder piston is designed in a hollow mode and is used for enabling a signal wire and confining oil in a pressure chamber to penetrate through a rotor of the rotary slip ring. The upper oil cylinder and the lower oil cylinder make hydraulic oil enter the oil cylinder through a hydraulic pipeline by the driving force of a pump, and the disturbance loading of axial dynamic and static combined stress is realized on a prepared sample. When loading is carried out, the lower oil cylinder applies pressure to the sample to simulate vertical static stress borne by the rock, then confining pressure is applied to simulate static stress, and then the upper oil cylinder applies disturbance stress to the sample. The waveform of the disturbance load has various forms: the amplitude of the applied disturbing force is divided into displacement and load, the test can realize the loading of different strain rates by adjusting the loading frequency, and the simulation of different dynamic disturbance amplitudes by adjusting the amplitude. The whole loading device is arranged on the turntable and rotates through the rotating system, and the reaction force when the sample is loaded is completely born by the three-axis cylinder wall of the pressure chamber.
The pressure chamber is made of special materials, has the advantages of high strength and low density, for example, carbon fibers improve the energy attenuation condition of X-rays when the X-rays pass through the pressure chamber under the condition of meeting the functional requirements. Flanges are arranged at two ends of the pressure chamber and are used for being connected with an upper oil cylinder lower cover connecting plate and a lower oil cylinder upper cover connecting plate. The lifting oil cylinder is used for lifting the testing machine and providing counter force for the upper sliding ring. After the sample is prepared, the lifting oil cylinder is started, the lifting oil cylinder lifting rod drives the pressure chamber and the upper structure to ascend, and after the sample is installed, the lifting oil cylinder lifting rod descends. The bottom of the pressure chamber is connected with the rotary table through a bottom connecting piece, so that the pressure chamber is stably connected with the rotary table during working. And (3) filling nitrogen into the pressure chamber through the reserved air guide pipe during the application of the confining pressure, firstly opening a control valve of the supercharger, and filling the nitrogen in the supercharger into the pressure chamber along the reserved air guide pipe so as to apply the confining pressure on the sample.
The upper part of the rotary table is connected with the lower cover of the lower oil cylinder and used for driving the testing machine to rotate, and the lower part of the rotary table is connected with the base of the testing machine. The upper rotating slip ring is provided with two liquid paths for the liquid supply slip ring and is used for supplying oil to the upper oil cylinder, the upper rotating slip ring stator is connected with a lifting oil cylinder cross beam and does not rotate along with the testing machine when working, the upper rotating slip ring rotor is connected with an upper end cover of the upper oil cylinder, and the upper rotating slip ring rotor synchronously rotates along with the testing machine when working. The lower rotary slip ring is a multi-path liquid supply and power supply slip ring and is used for surrounding pressure liquid supply of the lower oil cylinder and the pressure chamber, transmission of a deformation sensor, a built-in pressure sensor and even an acoustic emission signal in the pressure chamber, a rotor of the lower rotary slip ring is connected with a lower cover of the lower oil cylinder and rotates along with the testing machine, and a stator of the lower rotary slip ring is connected with a base of the testing machine and does not rotate along with the testing machine.
The X-ray transmitter emits X-rays, the X-rays penetrate through a scanned object, part of the X-rays are absorbed by the scanned object, and the penetrated rays are received by the detector. The absorption coefficient of the scanned object is obtained through a series of scans at different angles, and three-dimensional imaging is carried out. The micro-mechanism of the macroscopic mechanics behavior of the rock is revealed through the analysis of the original texture of the rock under the disturbance of the dynamic and static combined stress, the internal structure evolution law of the cracked structure, particularly the deformation cracking process.
The method for applying the device comprises the following steps:
s1: preparation of
The rock sample is wrapped by a transparent plastic tube for testing;
s2: and starting the lifting oil cylinder, enabling the lifting oil cylinder lifting rod to drive the pressure chamber and the upper structure to rise, then installing the sample, and enabling the lifting oil cylinder lifting rod to descend after the sample is installed, so that the lifting oil cylinder lifting rod is stably connected with the rotary table through a bottom connecting piece. In the process, the axial lead of the sample needs to be aligned with the axial leads of the upper pressure head and the lower pressure head of the pressure chamber;
s3: checking the upper device of the rotary table to determine that the fixation is good;
s4: and closing the main power supply of the power distribution cabinet, and lighting a power supply indicator lamp to indicate that the main power supply works normally. Powering on each subsystem: sequentially closing power supplies of all subsystems, electrifying an X-ray machine control box, electrifying a detector, a data acquisition subsystem, a trigger module, a scanning control subsystem, a camera monitoring device and the like;
s5: starting the X-ray machine, selecting a preheating mode according to the time length of the last shutdown and the present, and preheating. Simultaneously starting a computer system, running corresponding software and establishing connection through Ethernet;
s6: setting rock sample information, selecting or modifying scanning parameters (such as scanning height range, rotary table rotating speed, lifting speed, translation speed, step length, micro-motion parameters and the like) on a computer system control station;
s7: the scan begins. The X-ray machine emits beams, the detector receives signals, the scanning device subsystem completes various required movements, and the scanning control subsystem performs real-time control. The initial state of the rock can be obtained by scanning in the starting stage;
s8: opening a control valve of the supercharger, filling nitrogen in the supercharger into the pressure chamber along a reserved air guide pipe, applying confining pressure on the sample, and closing the control valve of the supercharger when the confining pressure reaches a pressure value set by a test;
s9: and starting the testing machine, rotating at a certain speed, and feeding oil to the upper oil cylinder and the lower oil cylinder to apply dynamic load to the sample. The method comprises the steps that firstly, a lower oil cylinder applies pressure to a sample to simulate vertical static stress borne by a rock, then confining pressure is applied to simulate the static stress, and then an upper oil cylinder applies disturbance stress to the sample. The waveform of the disturbance load has various forms: the amplitude of the applied disturbing force is divided into displacement and load, the test can realize the loading of different strain rates by adjusting the loading frequency, and the simulation of different dynamic disturbance amplitudes by adjusting the amplitude. During scanning, the oil pressure of the upper oil cylinder and the lower oil cylinder is adjusted, so that the loading of the sample is changed, and the dynamic and static combined stress disturbance of the sample is achieved.
S10: the scanning is carried out at different stages of the rock being disturbed by fatigue, and the mechanical loading test must be stopped when CT scanning imaging is carried out. The X-ray machine emits beams during scanning at each stage, the detector receives signals, the scanning device subsystem completes various required movements, and the scanning control subsystem performs real-time control to obtain CT images at different stages; when scanning is finished each time, stopping the X-ray machine to emit beams, and stopping the motion of each device of the subsystem of the scanning device;
s11: checking the obtained CT image, positioning the defect height on the image when a suspicious defect is found on the image, and carrying out CT scanning reconstruction or secondary experiment on the specified detection height;
s12: closing the radioactive source of the CT machine, unloading the horizontal loading device and the vertical loading device (namely, a pressure chamber), dismantling the sample and ending the test;
s13: the above-mentioned S2-S12 are CT scan tests under the condition of once dynamic and static combined cyclic loading, repeat S2-S12, carry on the test many times;
s14: after all detection tasks are finished, after the X-ray machine is cooled, turning off a power supply of the X-ray machine, turning off a power supply of a computer and a power supply of a numerical control system, turning off switches of all subsystems and turning off a main power supply of the system;
s15: and analyzing the obtained test data, acquiring a crack evolution (such as crack width, length and spatial position) process of the rock in a deformation and damage process under dynamic and static combined load, performing three-dimensional reconstruction, damage evolution description and damage variable analysis on the sample cracks, and realizing visualization and digital representation of the rock cracking process under dynamic and static combined stress disturbance.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a supporting sound combination loading rock rupture characterization test device of industry CT machine which characterized in that: the device comprises a tester base (1), an axial compression system, a confining pressure system, a rotating system and a scanning system, wherein the axial compression system comprises an upper oil cylinder rigid body (11), an upper oil cylinder upper cover (12), an upper oil cylinder lower cover connecting plate (5), an upper oil cylinder piston (10), a lower oil cylinder lower cover (3), a lower oil cylinder upper cover connecting plate (6), a lower oil cylinder barrel (2), a lower oil cylinder rigid body and a lower oil cylinder piston (4), the confining pressure system comprises a pressure chamber (7), a built-in pressure sensor (9), an external pressure sensor (16), an upper pressure head (19), a lower pressure head (20), a lifting oil cylinder lifting rod (23), a lifting oil cylinder base (22) and a lifting oil cylinder cross beam (24), the rotating system comprises a rotary table (15), an upper rotating slip ring stator (13), an upper rotating slip ring rotor (14), a lower rotating slip ring stator (17) and a lower rotating slip ring rotor (18), and the scanning system comprises an X-, The X-ray detector (34), the transmission motor (29), the transmission speed reducer (31), the transmission motor base (30), the transmission bearing base (33), the transmission lead screw (32), the sizing block (25) and the vertical rack.
2. The industrial CT machine matched dynamic and static combined loading rock fracture characterization test device according to claim 1, characterized in that: the testing machine is characterized in that the turntable (15) is arranged on the testing machine base (1), the turntable is connected with the lower rotating slip ring rotor (18) through the lower rotating slip ring stator (17), the turntable (15) is connected with the lower oil cylinder lower cover (3), the lower oil cylinder lower cover (3) is arranged on the lower oil cylinder lower part, the lower oil cylinder upper cover connecting plate (6) is arranged on the upper part of the lower oil cylinder lower cover (2), the upper oil cylinder upper cover connecting plate (6) is arranged on the upper part of the lower oil cylinder upper cover connecting plate (6) and is a pressure chamber (7), the lower pressure head (20) is arranged on the lower part of the pressure chamber (7), the upper pressure head (19) is correspondingly arranged on the upper part of the lower pressure head (20), the upper oil cylinder rigid body (11) is arranged on the upper part of the pressure chamber (7), the lower part of the upper oil cylinder rigid body (11) is the upper cover connecting plate (5), the upper oil cylinder upper cover (12.
3. The industrial CT machine matched dynamic and static combined loading rock fracture characterization test device according to claim 1, characterized in that: the lower oil cylinder (2) is internally provided with a lower oil cylinder piston (4) at the lower part, a pressure chamber piston (8) at the upper part and an upper oil cylinder piston (10) in an upper oil cylinder rigid body (11).
4. The industrial CT machine matched dynamic and static combined loading rock fracture characterization test device according to claim 1, characterized in that: an external pressure sensor (16) is arranged outside the lower oil cylinder barrel (2), and an internal pressure sensor (9) is arranged above the inner part of the pressure chamber (7).
5. The industrial CT machine matched dynamic and static combined loading rock fracture characterization test device according to claim 1, characterized in that: a sample (21) is arranged between the upper pressure head (19) and the lower pressure head (20).
6. The industrial CT machine matched dynamic and static combined loading rock fracture characterization test device according to claim 1, characterized in that: the lifting oil cylinder base (22) is connected with a lifting oil cylinder cross beam (24) through a lifting oil cylinder lifting rod (23) and stretches over the tester base (1), a hole is reserved in the middle of the lifting oil cylinder cross beam (24), and the upper rotating slip ring rotor (14) is installed in the hole.
7. The industrial CT machine matched dynamic and static combined loading rock fracture characterization test device according to claim 1, characterized in that: the testing machine is characterized in that the testing machine base (1) is arranged on the sizing block (25), two ends of the sizing block (25) are respectively provided with a vertical rack, the vertical rack is a first vertical rack (27) and a second vertical rack (28), the X-ray transmitter (26) is installed on the first vertical rack (27) through the transmission lead screw (32), the X-ray detector (34) is installed on the second vertical rack (28), the first vertical rack (27) is provided with the transmission motor (29), the transmission motor (29) is installed on the transmission motor base (30) through the transmission speed reducer (31), and the transmission lead screw (32) is connected with the transmission bearing base (33) in the lower portion.
8. The industrial CT machine matched dynamic and static combined loading rock fracture characterization test device according to claim 1, characterized in that: the pressure chamber (7) is made of carbon fibers, and flanges are arranged at two ends of the pressure chamber (7) and are used for being connected with the upper oil cylinder lower cover connecting plate (5) and the lower oil cylinder upper cover connecting plate (6).
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| CN202020315223.8U CN211856208U (en) | 2020-03-14 | 2020-03-14 | Industrial CT machine matched dynamic and static combined loading rock fracture characterization test device |
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| CN202020315223.8U CN211856208U (en) | 2020-03-14 | 2020-03-14 | Industrial CT machine matched dynamic and static combined loading rock fracture characterization test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111238973A (en) * | 2020-03-14 | 2020-06-05 | 北京科技大学 | Industrial CT machine matched dynamic and static combined loading rock fracture characterization test device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111238973A (en) * | 2020-03-14 | 2020-06-05 | 北京科技大学 | Industrial CT machine matched dynamic and static combined loading rock fracture characterization test device and method |
| CN111238973B (en) * | 2020-03-14 | 2023-05-02 | 北京科技大学 | Industrial CT machine matched dynamic and static combination loading rock fracture characterization test device and method |
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