CN111103200A - Real-time loading heating leaching test device in CT scanning process - Google Patents
Real-time loading heating leaching test device in CT scanning process Download PDFInfo
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- CN111103200A CN111103200A CN201911231200.7A CN201911231200A CN111103200A CN 111103200 A CN111103200 A CN 111103200A CN 201911231200 A CN201911231200 A CN 201911231200A CN 111103200 A CN111103200 A CN 111103200A
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- loading
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- end cover
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
Abstract
The invention relates to a real-time loading and heating leaching test device in a CT scanning process, which belongs to the technical field of rock indoor loading tests. The oil cylinder and the base of the device rotate through an upper rotating bearing and a lower rotating bearing, and the upper transmission gear and the lower transmission gear are meshed with two pinions on the upper portion and the lower portion of the transmission rod to achieve synchronous rotation of the oil cylinder and the base. The device avoids the single-axis loading realized by the sleeve, and avoids the great attenuation of rays after the rays pass through metal materials. The temperature of the liquid is adjusted by the temperature sensor and the heating rod together. The invention can realize the real-time scanning of the micro CT while performing the thermal-force-liquid coupling effect on the test piece, can obtain the stress-strain curve of the test piece in the loading process, and provides the realization method of the correspondence between the expansion of the pore crack and the constitutive relation of the test piece in the thermal-force-liquid coupling effect process.
Description
Technical Field
The invention relates to the technical field of indoor rock loading tests, in particular to a real-time loading heating leaching test device in a CT scanning process.
Background
Ct (industrial Computer tomography) scanning technology, namely, industrial computed tomography imaging technology, is a nondestructive detection technology, can clearly, intuitively and accurately show the internal structure and condition of an object to be detected, and is widely applied to industrial production in various fields. The rock testing machine is a basic testing instrument for researching the constitutive relation of rock, and the change of the internal condition of a sample in a pressed state can be intuitively observed through the combination of the rock testing machine and a CT testing machine.
The method has important guiding significance for engineering practice by researching the deformation condition of the rock in the complex environment. Domestic and foreign research shows that a real-time loading scanning instrument combined with CT is in an initial research and development stage, and China mining university researches a real-time loading device combined with CT, but only can realize a single physical field mechanical loading function. The tai yuan university studies a loading device combined with CT, but cannot realize a real-time loading function in the scanning process. The invention patent CN105928793A discloses a rock mechanical testing machine arranged on a rotary table, which mainly solves the problem of relative rotation between a rock sample and a CT scanner. But the mechanical research on the rock under the multi-field coupling effect cannot be met.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a real-time loading heating leaching test apparatus in the CT scanning process, aiming at the above-mentioned defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: construct a real-time loading and heating leaching test device in the CT scanning process, comprising: a fixed frame, a pressure loading, a mechanical rotation, a liquid leaching and a displacement sensor;
the fixing frame part comprises a cylindrical support, an end cover, an upper fixing part and a supporting device fixing screw hole; the end covers comprise upper and lower end covers which are circular, are fixedly connected with the cylindrical support and are used for sealing the cylinder openings at two ends of the cylindrical support; two rectangular windows are formed in the middle of the cylindrical support to realize ray penetration and disassembly and assembly of a test piece in the cylinder; the upper fixing part is annular and is fixedly arranged in the cylindrical bracket, and the holder fixing screw hole is arranged on the outer side wall of the cylindrical bracket;
the pressure loading part comprises a loading oil cylinder, a loading piston, a centering raised head, a centering cushion block, a test piece seat and a base; the upper end of the loading oil cylinder penetrates through a middle round hole of an upper end cover in the end cover, and the base penetrates through a middle round hole of a lower end cover in the end cover, so that friction-free mounting and moving are realized; the upper end of the loading oil cylinder is provided with a working oil port, and the loading oil cylinder is fixedly connected with the cylindrical support through an upper fixing part; the lower end of the test piece seat is screwed on the base through threads, a cylindrical rock test piece is placed at the upper end of the test piece seat, and a heating rod and a temperature sensor are installed on the base through a through hole so as to install the temperature sensor and the heating rod on the test piece seat;
the mechanical rotating part comprises an upper rotating bearing, a lower rotating bearing, a transmission gear and a transmission shaft, wherein the transmission gear is matched with the upper rotating bearing; the loading oil cylinder and the base are provided with rotating bearings, so that the test piece can rotate relative to the cylindrical frame, a transmission gear is arranged above the upper end cover and fixed on the loading oil cylinder, a transmission gear is arranged below the lower end cover and fixed on the base, and the upper transmission gear and the lower transmission gear are meshed with an upper pinion and a lower pinion of the transmission rod to realize synchronous rotation;
the liquid leaching part comprises a liquid container, a temperature sensor, a heating rod and a temperature controller; the liquid container is arranged in the clamping groove of the test piece seat, and the temperature sensor and the heating rod are connected with a temperature controller (24) through electric wires, so that the temperature is accurately controlled;
the displacement sensor comprises a measuring rod, a magnetic ring and a wire outlet; the measuring rod is inserted into the loading piston, the magnetic ring is attached to the upper portion of the loading piston and moves up and down along with the loading piston, and the wire outlet and the cable are connected with the PCL data acquisition system.
The invention provides a real-time loading and heating leaching test device in a CT scanning process, which is different from the prior art, belongs to the technical field of rock indoor loading tests, and mainly structurally comprises a fixed frame, a pressure loading part, a mechanical rotation part, a liquid leaching part and a displacement sensor. The oil cylinder and the base of the device rotate through an upper rotating bearing and a lower rotating bearing, and the upper transmission gear and the lower transmission gear are meshed with two pinions on the upper portion and the lower portion of the transmission rod to achieve synchronous rotation of the oil cylinder and the base. The device avoids the single-axis loading realized by the sleeve, and avoids the great attenuation of rays after the rays pass through metal materials. The temperature of the liquid is adjusted by the temperature sensor and the heating rod together. The invention can realize the real-time scanning of the micro CT while performing the thermal-force-liquid coupling effect on the test piece, can obtain the stress-strain curve of the test piece in the loading process, and provides the realization method of the correspondence between the expansion of the pore crack and the constitutive relation of the test piece in the thermal-force-liquid coupling effect process.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic structural diagram of a real-time loading, heating and leaching test device in a CT scanning process provided by the invention.
FIG. 2 is a schematic diagram of the operation of an X-ray generator in a real-time loading, warming and leaching test device in a CT scanning process according to the present invention.
In the figure, 1-cylindrical frame, 2-end cover, 3-upper fixing part, 4-loading oil cylinder, 5-loading piston, 6-centering raised head, 7-centering cushion block, 8-test piece seat, 9-base, 10-working oil port, 11-rotating bearing, 12-a \ 12-b-transmission gear, 13-transmission shaft, 14-liquid container, 15-temperature sensor, 16-heating rod, 17-measuring rod, 18-magnetic ring, 19-outlet, 20-CT turntable three-grab, 21-test piece, 24-temperature controller and 25-holder fixing screw hole.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
The real-time loading heating leaching test device in the CT scanning process comprises: a fixed frame, a pressure loading, a mechanical rotation, a liquid leaching and a displacement sensor;
the fixing frame part comprises a cylindrical support 1, an end cover 2, an upper fixing part 3 and a supporting device fixing screw hole 25; the end cover 2 comprises an upper end cover and a lower end cover which are circular, fixedly connected with the cylindrical support 1 and used for sealing the cylinder openings at two ends of the cylindrical support 1; two rectangular windows are formed in the middle of the cylindrical support 1 so as to realize ray penetration and disassembly and assembly of a test piece in the cylinder; the upper fixing part 3 is annular and is fixedly arranged inside the cylindrical bracket 1, and the holder fixing screw hole 25 is arranged on the outer side wall of the cylindrical bracket 1;
the pressure loading part comprises a loading oil cylinder 4, a loading piston 5, a centering raised head 6, a centering cushion block 7, a test piece seat 8 and a base 9; the upper end of the loading oil cylinder 4 penetrates through a middle round hole of an upper end cover in the end cover 2, and the base 9 penetrates through a middle round hole of a lower end cover in the end cover 2, so that friction-free mounting and moving are realized; the upper end of the loading oil cylinder 4 is provided with a working oil port 10, and the loading oil cylinder 4 is fixedly connected with the cylindrical support 1 through the upper fixing part 3; the lower end of the test piece seat 8 is screwed on the base 9 through threads, the cylindrical rock test piece 21 is placed at the upper end of the test piece seat 8, and the base 9 is provided with a through hole for installing the heating rod 16 and the temperature sensor 15 so as to install the temperature sensor 15 and the heating rod 16 on the test piece seat 8;
the mechanical rotating part comprises an upper rotating bearing 11, a lower rotating bearing 11, transmission gears 12-a and 12-b which are matched with each other, and a transmission shaft 13; the loading oil cylinder 4 and the base 9 are provided with rotating bearings 11 which can realize the rotation of the test piece 21 relative to the cylindrical frame 1, a transmission gear 12-a is arranged above the upper end cover and fixed on the loading oil cylinder 4, a transmission gear 12-a is arranged below the lower end cover and fixed on the base 9, and the upper transmission gear 12-a and the lower transmission gear 12-a are meshed with the upper pinion 12-b and the lower pinion 12-b of the transmission rod 13 to realize synchronous rotation;
the liquid leaching part comprises a liquid container 14, a temperature sensor 15, a heating rod 16 and a temperature controller 24; the liquid container 14 is arranged in a clamping groove of the test piece seat 8, and the temperature sensor 15 and the heating rod 16 are connected with the temperature controller 24 through electric wires, so that the temperature is accurately controlled;
the displacement sensor comprises a measuring rod 17, a magnetic ring 18 and an outlet 19; the measuring rod 17 is inserted into the loading piston 5, the magnetic ring 18 is attached to the upper part of the loading piston 5 and moves up and down along with the loading piston 5, and the cable outlet 19 is connected with the PCL data acquisition system.
After the instrument and the test piece are installed and connected, adding a leaching liquid into the liquid container 14; switching on the power supply, setting a preset heating temperature, starting heating the leaching liquid by the heating rod 16, and keeping the liquid temperature dynamic stability by the temperature controller 24 after the temperature reaches the preset value; heating the test piece, and simultaneously supplying liquid to the loading oil cylinder 4 through a stress control system to carry out stress loading on the test piece; keeping the stress stable after reaching the preset value; and (3) starting to carry out micro CT scanning on the test piece after the state of the test piece meets the test requirement, enabling the X-ray generated by the X-ray generator to pass through the liquid container 14 and the test piece through the window on the cylindrical frame 1 and then reach the flat panel detector 23, and keeping the temperature and the stress stable in the process. As shown in fig. 2.
When CT scanning is carried out, a three-claw 20 of a CT turntable clamps a base 9 of a loading device to drive the base 9, a test piece seat 8, a test piece and lower end transmission gears 12-a and 12-b fixed on the base 9 to rotate, an upper loading oil cylinder 4 and upper end transmission gears 12-a and 12-b are fixed together, an upper part and a lower part are meshed together through a gear on a transmission shaft 13, and a rotating mechanism on a CT testing machine drives the upper part and the lower part to synchronously rotate. The base 9 and the loading oil cylinder 4 are connected with the cylindrical frame 1 through an upper rotating bearing and a lower rotating bearing, so that the upper part and the lower part synchronously rotate, the cylindrical frame 1 is static relative to the CT testing machine, and the test piece rotates relative to the CT testing machine.
The invention provides a real-time loading and heating leaching test device in a CT scanning process, which is different from the prior art, belongs to the technical field of rock indoor loading tests, and mainly structurally comprises a fixed frame, a pressure loading part, a mechanical rotation part, a liquid leaching part and a displacement sensor. The oil cylinder and the base of the device rotate through an upper rotating bearing and a lower rotating bearing, and the upper transmission gear and the lower transmission gear are meshed with two pinions on the upper portion and the lower portion of the transmission rod to achieve synchronous rotation of the oil cylinder and the base. The device avoids the single-axis loading realized by the sleeve, and avoids the great attenuation of rays after the rays pass through metal materials. The temperature of the liquid is adjusted by the temperature sensor and the heating rod together. The invention can realize the real-time scanning of the micro CT while performing the thermal-force-liquid coupling effect on the test piece, can obtain the stress-strain curve of the test piece in the loading process, and provides the realization method of the correspondence between the expansion of the pore crack and the constitutive relation of the test piece in the thermal-force-liquid coupling effect process.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (1)
1. The utility model provides a real-time loading of CT scanning in-process heats leaching test device which characterized in that includes:
a fixed frame, a pressure loading, a mechanical rotation, a liquid leaching and a displacement sensor;
the fixing frame part comprises a cylindrical support (1), an end cover (2), an upper fixing part (3) and a supporting device fixing screw hole (25); the end cover (2) comprises an upper end cover and a lower end cover which are circular, fixedly connected with the cylindrical support (1) and used for sealing the cylinder openings at the two ends of the cylindrical support (1); two rectangular windows are formed in the middle of the cylindrical support (1) so as to realize ray penetration and disassembly and assembly of a test piece in the cylinder; the upper fixing part (3) is annular and is fixedly arranged in the cylindrical support (1), and the holder fixing screw hole (25) is arranged on the outer side wall of the cylindrical support (1);
the pressure loading part comprises a loading oil cylinder (4), a loading piston (5), a centering raised head (6), a centering cushion block (7), a test piece seat (8) and a base (9); the upper end of the loading oil cylinder (4) penetrates through a middle round hole of an upper end cover in the end cover (2), and the base (9) penetrates through a middle round hole of a lower end cover in the end cover (2), so that friction-free mounting and moving are realized; the upper end of the loading oil cylinder (4) is provided with a working oil port (10), and the loading oil cylinder (4) is fixedly connected with the cylindrical support (1) through the upper fixing part (3); the lower end of the test piece seat (8) is screwed on the base (9) through threads, a cylindrical rock test piece (21) is placed at the upper end of the test piece seat (8), a through hole is formed in the base (9) and is used for installing a heating rod (16) and a temperature sensor (15), and the temperature sensor (15) and the heating rod (16) are installed on the test piece seat (8);
the mechanical rotating part comprises an upper rotating bearing (11), a lower rotating bearing (11), transmission gears (12-a) and (12-b) which are matched with each other, and a transmission shaft (13); the loading oil cylinder (4) and the base (9) are provided with rotating bearings (11) which can realize the rotation of the test piece (21) relative to the cylindrical frame (1), a transmission gear (12-a) is arranged above the upper end cover and fixed on the loading oil cylinder (4), a transmission gear (12-a) is arranged below the lower end cover and fixed on the base (9), and the upper and lower transmission gears (12-a) are meshed with the upper and lower pinions (12-b) of the transmission rod (13) to realize synchronous rotation;
the liquid leaching part comprises a liquid container (14), a temperature sensor (15), a heating rod (16) and a temperature controller (24); the liquid container (14) is arranged in a clamping groove of the test piece seat (8), and the temperature sensor (15) and the heating rod (16) are connected with the temperature controller (24) through electric wires to realize the accurate control of the temperature;
the displacement sensor comprises a measuring rod (17), a magnetic ring (18) and an outlet (19); the measuring rod (17) is inserted into the loading piston (5), the magnetic ring (18) is attached to the upper part of the loading piston (5) and moves up and down along with the loading piston (5), and the cable at the wire outlet (19) is connected with the PCL data acquisition system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911231200.7A CN111103200A (en) | 2019-12-05 | 2019-12-05 | Real-time loading heating leaching test device in CT scanning process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911231200.7A CN111103200A (en) | 2019-12-05 | 2019-12-05 | Real-time loading heating leaching test device in CT scanning process |
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| CN111103200A true CN111103200A (en) | 2020-05-05 |
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| CN201911231200.7A Pending CN111103200A (en) | 2019-12-05 | 2019-12-05 | Real-time loading heating leaching test device in CT scanning process |
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