CN211740921U - Deep high-temperature and high-pressure environment rock stretching and tension-compression circulating mechanical experiment device - Google Patents
Deep high-temperature and high-pressure environment rock stretching and tension-compression circulating mechanical experiment device Download PDFInfo
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- CN211740921U CN211740921U CN202020488617.3U CN202020488617U CN211740921U CN 211740921 U CN211740921 U CN 211740921U CN 202020488617 U CN202020488617 U CN 202020488617U CN 211740921 U CN211740921 U CN 211740921U
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Abstract
The utility model provides a deep high temperature high pressure environment rock is tensile and draw pressure cycle mechanics experimental apparatus, relate to deep rock mechanics test technical field, it is including sealed triaxial chamber, be provided with confining pressure analog module and temperature analog module around the test piece chamber in the triaxial chamber, the top and the below in test piece chamber are provided with upper pressure head system and next pressure head system respectively, be provided with osmotic pressure analog module in upper pressure head system and the next pressure head system, be provided with confining pressure oil between upper pressure head system and the next pressure head system and the confining pressure analog module and separate absolute seal, next pressure head system sealing connection is in the bottom of triaxial chamber, upper pressure head system sliding seal connects in the top of triaxial chamber. The problem of high temperature high pressure rock triaxial mechanics experimental system among the prior art can't carry out rock tensile and draw and press cyclic loading under the deep environment is solved.
Description
Technical Field
The utility model relates to a deep rock mechanics tests technical field, especially relates to a deep high temperature high pressure environment rock is tensile and draw pressure circulation mechanics experimental apparatus.
Background
Engineering rock masses in the deep rock engineering field such as deep resource exploitation and deep space utilization are often in complex environments such as high temperature, high stress, high osmotic pressure and the like, rock mechanical parameters are basic data for developing deep engineering design and construction and deep resource exploitation design and optimization, and the accurate testing and acquisition of the rock mechanical parameters in the deep environment is undoubtedly a key link and a pre-guiding task of deep rock engineering practice. Under the common influence of factors such as complex geological structure, ground stress environment, engineering activities and the like, the deep rock tensile stress and even tensile-compression cyclic stress loading are quite common, for example, the rock tensile fracture or the tensile-compression cyclic failure can be caused by reservoir fatigue pneumatic transformation of unconventional oil and gas development, hydraulic fracturing test of ground stress test, excavation disturbance of deep surrounding rocks and the like. Therefore, how to accurately test and acquire the mechanical properties of the rock tensile and tension-compression cycles in the deep environment is very important.
Rock mechanics behavior and parameter testing under the deep environment must rely on rock mechanics test equipment that can realize deep environment loading, and rock compression and triaxial shear mechanics tests under high temperature, high stress, high osmotic pressure can all be realized to current high temperature high pressure rock triaxial mechanics experiment system to can accurately obtain rock compression strength, mole coulomb shear strength parameter under different high temperature high pressure environment etc.. The deep high-stress environment is mainly realized by applying a confining pressure equal to the deep stress. However, the existing high-temperature and high-pressure rock triaxial mechanical testing system, such as the world-known rock mechanical testing system MTS815, can only realize compression loading in a triaxial environment, and because confining pressure and axial pressure are not separated, such equipment cannot realize tensile loading under high confining pressure, so that rock tensile and tension-compression cyclic loading in a deep environment cannot be carried out, and further rock tensile strength and tension-compression cyclic mechanical properties in the deep environment cannot be obtained.
On the other hand, commercial force sensors of such rock triaxial mechanical devices do not provide a solution for separating confining pressure from axial pressure, and therefore cannot be modified to form a seal to isolate the action of confining pressure oil so as to actually measure the force acting on the sample. However, such equipment has excellent confining pressure control system, temperature control system and permeability control system, and how to fully utilize these systems to carry out deep high-temperature high-pressure environment rock stretching and tension-compression cycle mechanics experiments becomes a problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem among the prior art, the utility model provides a deep high temperature high pressure environment rock is tensile with draw and press circulation mechanics experimental apparatus has solved the high temperature high pressure rock triaxial mechanics experimental system among the prior art and can't develop the rock tensile and draw and press the loaded problem of circulation under the deep environment.
In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows:
the utility model provides a tensile and drawing pressure cycle mechanics experimental apparatus of deep high temperature high pressure environment rock, it is including sealed triaxial chamber, be provided with confining pressure simulation module and temperature simulation module around the test piece chamber in the triaxial chamber, the top and the below in test piece chamber are provided with upper pressure head system and next pressure head system respectively, be provided with osmotic pressure simulation module in upper pressure head system and the next pressure head system, be provided with confining pressure oil isolation sealing member between upper pressure head system and the next pressure head system and the confining pressure simulation module, next pressure head system sealing connection is in the bottom of triaxial chamber, upper pressure head system sliding seal connects in the top of triaxial chamber.
The utility model has the advantages that: the upper pressure head system is detachably connected with the upper pressure head of the existing triaxial mechanical experiment system, the lower pressure head system is detachably connected with the upper disc centering of the axial actuator of the existing triaxial mechanical experiment system, so that the upper pressure head of the existing triaxial mechanical experiment system is enabled to be connected, the axial actuator is not required to stretch into a high-temperature high-pressure triaxial chamber and can transmit axial stretching and compressing acting force to a test piece, the sensor for detecting a pressure value is not required to be placed in the high-temperature high-pressure triaxial chamber, the performance requirement on the sensor is greatly reduced, the use cost of the sensor is reduced, and the service life of the sensor is prolonged. The sensors used in the triaxial mechanical experiment are all small-range sensors, the precision of the sensors is easily influenced by a high-temperature and high-pressure environment, so that the measured data is inaccurate, the accuracy of the detected data of the sensors is ensured after the mechanical experiment device is used, and the defect that the high-temperature and high-pressure sensors are not suitable for stretching small-range high-precision loading due to the large range is overcome.
Be provided with the isolated sealing member of confining pressure oil between upper pressure head system and the next pressure head system and the confining pressure simulation module, can separate confining pressure and axle pressure through this isolated sealing member of confining pressure oil, axle pressure and confining pressure are independent each other, make can enough compress and also can carry out tensile test to the test piece, thereby can stretch and draw pressure cycle loading to the rock under high temperature high pressure environment, thereby can simulate deep high temperature high pressure environment more comprehensively and truly and then let the rock mechanics data that record more accurate. And the device can be popularized and applied to compression loading under high temperature and high pressure, and the function of a three-axis press is realized.
The mechanical experiment device is an improvement on the existing triaxial mechanical experiment system, has simple and ingenious structure, is easy to process and manufacture, is convenient to install, has low application cost and is favorable for popularization and use.
Drawings
FIG. 1 is a schematic structural diagram of a rock stretching and tension-compression cyclic mechanics experimental device in a deep high-temperature and high-pressure environment.
Wherein, 1, a triaxial chamber; 2. a test piece cavity; 3. a confining pressure simulation module; 31. a confining pressure oil pipeline; 4. a temperature simulation module; 41. a heater; 5. an upper ram system; 51. an upper penetration pressure head; 52. switching a pressure head; 521. a limiting block; 53. an upper pressure head; 531. an upper connector; 54. steel jacket; 55. an upper adhesive layer; 56. a first limit concave-convex structure; 6. a lower ram system; 61. a lower infiltration pressure head; 611. a lower adhesive layer; 612. a second limiting concave-convex structure; 62. a lower pressure head; 621. a lower connector; 7. a penetrating die simulation module; 71. an upper permeate tube; 72. an upper infiltration opening; 73. a lower infiltration opening; 74. a lower infiltration pipe; 8. a confining pressure oil isolation seal; 9. a sealing film; 10. a circumferential extensometer; 101. and a chain.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes will be apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all inventions contemplated by the present invention are protected.
As shown in fig. 1, this tensile and tension-compression cycle mechanics experimental apparatus of deep high temperature and high pressure environment rock includes sealed triaxial chamber 1, be provided with confining pressure simulation module 3 and temperature simulation module 4 around test piece chamber 2 in triaxial chamber 1, the top and the below of test piece chamber 2 are provided with upper pressure head system 5 and lower pressure head system 6 respectively, be provided with osmotic pressure simulation module 7 in upper pressure head system 5 and the lower pressure head system 6, be provided with confining pressure oil isolation sealing member 8 between upper pressure head system 5 and the lower pressure head system 6 and confining pressure simulation module 3, lower pressure head system 6 sealing connection is in the bottom of triaxial chamber 1, upper pressure head system 5 sliding seal connects in the top of triaxial chamber 1.
The side plates, the top plate and the bottom plate which surround the triaxial chamber 1 are integral tank bodies with the rigidity not lower than 0.5MN, and the side plates of the triaxial chamber 1 are cylindrical. The heater 41 in the temperature simulation module 4 is packaged in the side plate of the triaxial chamber 1, the heater 41 is connected with a temperature control system in the existing triaxial mechanical experiment system through a high-temperature and high-pressure resistant cable which is also packaged in the integral tank body, and the heating temperature and the heating time of the heater 41 are controlled through the temperature control system.
The cavity between the test piece cavity 2 and the triaxial chamber 1 is wrapped by confining pressure oil, the confining pressure oil is sent into the triaxial chamber 1 through a confining pressure oil pipeline 31 packaged in a bottom plate of the triaxial chamber 1, the confining pressure oil pipeline 31 is connected with a confining pressure oil source and a confining pressure oil control system in the existing triaxial mechanical experiment system, and the input amount and the input pressure of the confining pressure oil in the confining pressure oil source are controlled through the confining pressure oil control system.
The upper pressure head system 5 comprises an upper permeation pressure head 51, a transfer pressure head 52 and an upper pressure head 53 which are sequentially connected from bottom to top. The upper pressure head 53 is in threaded connection with the osmotic pressure head 51 through the adapter pressure head 52, and the upper pressure head 53 is in threaded connection with the osmotic pressure head 51, so that the length of a threaded connection section can be adjusted to coordinate the magnitude of the applied pretightening force.
An upper connector 531 is integrally formed at one end of the upper pressure head 53, which is far away from the upper permeation pressure head 51, the upper pressure head 53 and the upper connector 531 form a T-shaped structure, and the bottom surface of the upper connector 531 abuts against the top surface of the adapter pressure head 52. The upper connector 531 is used for being connected with an upper pressure head of the existing triaxial mechanical experiment system through a threaded fastener.
The adapter ram 52 passes through the shaft hole of the steel sleeve 54, the outer cylindrical surface of the adapter ram 52 is in sliding connection with the inner cylindrical surface of the steel sleeve 54, and a dynamic sealing O-shaped sealing ring is arranged on the sliding surface for sliding sealing. The steel bushing 54 is screwed into a threaded hole through the top plate of the triaxial chamber 1. An upper bonding layer 55 is arranged on the bottom surface of the upper permeation pressure head 51, and the upper bonding layer 55 is glue coated on the whole bottom surface and used for bonding a rock test piece.
The top and the bottom of switching pressure head 52 are provided with stopper 521 respectively, limit switching pressure head 52's sliding distance through the butt of stopper 521 and two terminal surfaces of steel bushing 54, and the distance between two stopper 521 equals the distance that allows switching pressure head 52 to slide, realizes tensile and the motion stroke control of pulling and pressing through two stopper 521 to prevent switching pressure head 52 and deviate from steel bushing 54.
Be provided with first spacing concave-convex structure 56 between the top surface of going up infiltration pressure head 51 and the switching pressure head 52 bottom surface, first spacing concave-convex structure 56 includes integrated into one piece in the annular boss in switching pressure head 52 bottom surface middle part, and processing has the annular groove that supplies the embedding of annular boss on the top surface of last infiltration pressure head 51, comes the restriction to go up infiltration pressure head 51 and the relative movement of switching pressure head 52 on the horizontal plane through first spacing concave-convex structure 56.
The confining pressure oil isolation sealing piece 8 is arranged at the joint of the upper permeation pressure head 51 and the switching pressure head 52, the confining pressure oil isolation sealing piece 8 is an O-shaped sealing ring resistant to high temperature and high pressure, and is used for isolating confining pressure oil in the triaxial chamber 1 from entering the upper pressure head system 5 and playing the aims of isolating confining pressure and axial pressure.
The lower indenter system 6 includes a lower infiltration indenter 61 placed on the bottom surface of the triaxial chamber, and a lower adhesive layer 611 is provided on the top surface of the lower infiltration indenter 61, and the lower adhesive layer 611 is the same as the upper adhesive layer 55, and the function is realized to fix the lower infiltration indenter to the test piece.
Be provided with the spacing concave-convex structure of second 612 down between infiltration pressure head 61 and the triaxial chamber bottom surface, the spacing concave-convex structure of second 612 includes integrated into one piece in the annular boss in the middle part of infiltration pressure head 61 bottom surface, is processed on the triaxial chamber bottom surface and is supplied the annular groove of annular boss embedding, restricts infiltration pressure head 61 and the relative movement of triaxial chamber bottom surface on the horizontal plane down through the spacing concave-convex structure of second 612.
The lower pressure head 62 penetrates through the bottom plate of the triaxial chamber 1 to be in threaded connection with the lower permeation pressure head 61, a lower connecting head 621 is integrally formed at one end of the lower pressure head 62, which is far away from the lower permeation pressure head 61, the lower pressure head 62 and the lower connecting head 621 form a T-shaped structure, and the lower connecting head 621 abuts against the bottom plate of the triaxial chamber 1. And a confining pressure oil isolating sealing part 8 is arranged at the joint of the lower penetration pressure head 61 and the bottom surface of the triaxial chamber, and confining pressure oil is isolated by the confining pressure oil isolating sealing part 8 and enters the lower pressure head system 6.
The osmotic pressure simulation module 7 comprises an upper osmotic pipe 71 which penetrates through and is plugged along the axial direction of the adapting pressure head 52, and an upper osmotic hole 72 which is arranged on the upper osmotic pressure head 51 and communicates the upper osmotic pipe 71 with the test piece cavity 2, wherein one end of the upper osmotic pipe 71, which is far away from the upper osmotic hole 72, is connected with a liquid outlet collecting device, which is generally a collecting barrel and a pipeline which communicates the collecting barrel with the upper osmotic pipe 71 and is used for receiving substances such as osmotic liquid flowing out from the upper osmotic pipe 71.
The lower infiltration pressure head 61 is provided with an infiltration channel 73 with one end being introduced into the test piece cavity 2, and the other end of the infiltration channel 73 is connected with an infiltration pressure generating device through an infiltration pipe 74. The osmotic pressure generating device is a spare part in the existing rock mechanical testing machine, generally comprises equipment such as a water pump and an air pump, and is used for simulating osmotic pressure in a real rock environment.
The upper permeation tube 71 and the lower permeation tube 74 are hollow tubes with connecting threads machined on the outer cylindrical surfaces, the upper permeation tube 71 is fixed on the adapter press head 52 through threaded connection, and the lower permeation tube 74 is fixed on the bottom plate of the triaxial chamber 1 through threaded connection. Sealing rings for preventing leakage of permeation media are arranged at the joint of the upper permeation tube 71 and the upper permeation pore canal 72 and the joint of the lower permeation tube 74 and the lower permeation pore canal 73, so that stability of permeation pressure is guaranteed.
The test piece cavity 2 and the confining pressure oil are separated by a high-temperature and high-pressure resistant sealing film 9, and a chain 101 of a circumferential extensometer 10 is sleeved on the sealing film 9 and used for detecting the deformation of the rock test piece.
In the test process, a plurality of rock test pieces are usually required to be tested, the upper infiltration pressure head 51 and the lower infiltration pressure head 61 are bonded at two ends of the rock test piece in a centering way to form a test piece whole in advance, and then the test piece whole is placed into the test piece cavity 2. Because the dynamic seal installation requirement between the steel sleeve 54 and the adapting pressure head 52 is high, and the adapting pressure head 52 is not suitable for frequent disassembly, the steel sleeve 54, the upper pressure head 53, the adapting pressure head 52 and the limiting block 521 do not need to be disassembled after being assembled once, the whole is directly screwed into a threaded hole on a top plate of a three-axis chamber in each use, then the upper pressure head 53 and the upper infiltration pressure head 51 are screwed, the lower pressure head 62 and the lower infiltration pressure head 61 are screwed, the upper pressure head 53 in the scheme is connected with the upper pressure head of the existing three-axis mechanics experiment system through a threaded fastener, the lower pressure head 62 and an axial actuator of the existing three-axis mechanics experiment system are in centering threaded connection, and finally, pipelines and cables related to the confining pressure simulation module 3, the temperature simulation module 4 and the infiltration simulation module 7 are connected into corresponding supply sources and control systems.
Claims (10)
1. A deep high-temperature high-pressure environment rock stretching and tension-compression cyclic mechanics experimental device is characterized by comprising a sealed triaxial chamber (1), a confining pressure simulation module (3) and a temperature simulation module (4) are arranged around the test piece cavity (2) in the triaxial chamber (1), an upper pressure head system (5) and a lower pressure head system (6) are respectively arranged above and below the test piece cavity (2), osmotic pressure simulation modules (7) are arranged in the upper pressure head system (5) and the lower pressure head system (6), a confining pressure oil isolating sealing piece (8) is arranged between the upper pressure head system (5) and the confining pressure simulation module (3) and between the lower pressure head system (6), the lower pressure head system (6) is connected with the bottom end of the three-axis chamber (1) in a sealing way, and the upper pressure head system (5) is connected to the top end of the triaxial chamber (1) in a sliding and sealing manner.
2. The deep high-temperature high-pressure environment rock stretching and tension-compression cyclic mechanical experiment device is characterized in that the upper pressure head system (5) comprises an upper penetration pressure head (51), an adapter pressure head (52) and an upper pressure head (53) which are sequentially connected from bottom to top, the upper pressure head (53) penetrates through the adapter pressure head (52) and is detachably connected to the penetration pressure head (51), the adapter pressure head (52) is connected to a shaft hole of a steel sleeve (54) in a sliding and sealing mode, the steel sleeve (54) is detachably connected to the top end of the triaxial chamber (1), and an upper bonding layer (55) is arranged on the bottom surface of the upper penetration pressure head (51).
3. The deep high-temperature high-pressure environment rock tensile and tension-compression cycle mechanics experiment device according to claim 2, characterized in that one end of the upper pressure head (53) far away from the upper permeation pressure head (51) is provided with an upper connector (531), and the bottom surface of the upper connector (531) abuts against the top surface of the adapter pressure head (52).
4. The deep high-temperature high-pressure environment rock tensile and tensile compression cyclic mechanics experiment device according to claim 2, characterized in that the top end and the bottom end of the adapter indenter (52) are respectively provided with a limiting block (521).
5. The deep high-temperature high-pressure environment rock tensile and tensile-compression cyclic mechanical experiment device is characterized in that a first limiting concave-convex structure (56) is arranged between the top surface of the upper penetration pressure head (51) and the bottom surface of the adapter pressure head (52).
6. The deep high-temperature high-pressure environment rock tensile and tension-compression cycle mechanics experiment device according to claim 2, characterized in that the confining pressure oil isolation seal (8) is arranged at the joint of the upper penetration pressure head (51) and the adapter pressure head (52).
7. The deep high-temperature high-pressure environment rock tensile and tension-compression cycle mechanical experiment device is characterized in that the infiltration die simulation module (7) comprises an upper infiltration pipe (71) which is inserted in a penetrating manner along the axial direction of the adapter ram (52), and an upper infiltration pore canal (72) which is arranged on the upper infiltration ram (51) and communicates the upper infiltration pipe (71) with the test piece cavity (2), wherein one end, far away from the upper infiltration pore canal (72), of the upper infiltration pipe (71) is connected with a liquid outlet collecting device.
8. The deep high-temperature high-pressure environment rock tensile and tension-compression cycle mechanical experiment device is characterized in that the lower pressure head system (6) comprises a lower penetration pressure head (61) connected to the bottom surface of a triaxial chamber, a lower pressure head (62) penetrates through the bottom plate of the triaxial chamber (1) to be detachably connected with the lower penetration pressure head (61), and a lower connecting head (621) is arranged at one end, away from the lower penetration pressure head (61), of the lower pressure head (62); and the joint of the lower penetration pressure head (61) and the bottom surface of the triaxial chamber is provided with the confining pressure oil isolation sealing piece (8).
9. The deep high-temperature high-pressure environment rock tensile and tension-compression cycle mechanics experimental device according to claim 8, wherein a lower bonding layer (611) is arranged on the top surface of the lower penetration pressure head (61), a second limiting concave-convex structure (612) is arranged between the lower penetration pressure head (61) and the bottom surface of the triaxial chamber, a lower penetration pore (73) with one end opening into the test piece cavity (2) is arranged on the lower penetration pressure head (61), and the other end of the lower penetration pore (73) is connected with a penetration pressure generating device through a lower penetration pipe (74).
10. The deep high-temperature high-pressure environment rock tensile and tensile compression cycle mechanics experimental device according to claim 1, characterized in that side plates, a top plate and a bottom plate which surround the triaxial chamber (1) are integral tank bodies with rigidity not lower than 0.5MN, and a heater (41) in the temperature simulation module (4) is sealed in the side plates of the triaxial chamber (1).
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| CN202020488617.3U CN211740921U (en) | 2020-04-07 | 2020-04-07 | Deep high-temperature and high-pressure environment rock stretching and tension-compression circulating mechanical experiment device |
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| CN202020488617.3U CN211740921U (en) | 2020-04-07 | 2020-04-07 | Deep high-temperature and high-pressure environment rock stretching and tension-compression circulating mechanical experiment device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307606A (en) * | 2020-04-07 | 2020-06-19 | 四川大学 | Deep high-temperature and high-pressure environment rock stretching and tension-compression circulating mechanical experiment device |
| CN112964573A (en) * | 2021-02-08 | 2021-06-15 | 四川大学 | Cylindrical surface direct shear rheological testing machine for cylindrical rock core in deep-ground environment |
-
2020
- 2020-04-07 CN CN202020488617.3U patent/CN211740921U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307606A (en) * | 2020-04-07 | 2020-06-19 | 四川大学 | Deep high-temperature and high-pressure environment rock stretching and tension-compression circulating mechanical experiment device |
| CN111307606B (en) * | 2020-04-07 | 2024-05-14 | 四川大学 | Deep high-temperature high-pressure environment rock stretching and pulling-pressing cyclic mechanics experimental device |
| CN112964573A (en) * | 2021-02-08 | 2021-06-15 | 四川大学 | Cylindrical surface direct shear rheological testing machine for cylindrical rock core in deep-ground environment |
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