CN111537271A - Bellows type temperature control fidelity corer experiment platform - Google Patents
Bellows type temperature control fidelity corer experiment platform Download PDFInfo
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- CN111537271A CN111537271A CN202010507995.6A CN202010507995A CN111537271A CN 111537271 A CN111537271 A CN 111537271A CN 202010507995 A CN202010507995 A CN 202010507995A CN 111537271 A CN111537271 A CN 111537271A
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- 238000002474 experimental method Methods 0.000 title claims abstract description 68
- 238000012360 testing method Methods 0.000 claims abstract description 75
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 29
- 230000009471 action Effects 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 description 11
- 238000005553 drilling Methods 0.000 description 10
- 239000011435 rock Substances 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 physical mechanics Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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Abstract
The invention relates to a bellows type temperature control fidelity corer experiment platform, which comprises a box body, a temperature control system and a pressure experiment chamber, wherein the pressure experiment chamber is used for simulating a fidelity chamber of a fidelity corer; the temperature control system comprises a fan heater assembly, and an outlet of the fan heater assembly is connected with an air inlet through an air inlet pipeline; the pressure experiment cabin comprises a first test piece, a second test piece and an intermediate connecting piece, the first test piece is connected with the second test piece through the intermediate connecting piece, and a liquid injection hole is formed in the wall of the intermediate connecting piece. The invention can simulate high-temperature environment, can heat the pressure experiment chamber externally, can provide high-temperature environment for the pressure experiment chamber, and leads the experiment to be more complete and objective and the data to be more reliable; the middle connecting piece is used for connecting the test piece, so that the test piece can be prevented from being drilled, the test piece is prevented from being damaged, and the accuracy of the experiment can be improved.
Description
Technical Field
The invention relates to the technical field of test systems of coring devices, in particular to a bellows type temperature control fidelity corer test platform.
Background
The mineral resources in the shallow part of the earth are gradually exhausted, and the marching to the deep part of the earth is an important direction of scientific and technological innovation in China in the near term and in the future. The in-situ rock mechanical behavior law of different deep occurrence terranes is the guiding science and theoretical basis of deep drilling, deep resource development and utilization and earth application science.
The characteristics of deep rock such as physical mechanics, chemical biology and the like are closely related to the in-situ environmental conditions, the in-situ environmental loss in the coring process can cause the distortion and the irreversible change of the physicochemical property and the mechanical property of the rock core, and the key of the attack is how to obtain the in-situ rock core under the deep environmental conditions and carry out real-time loading test and analysis under the in-situ fidelity state.
At present, in-situ fidelity coring devices store rock cores in a core storage tube after the rock cores are drilled by a drilling tool, and realize the simulation of the in-situ environment of the rock cores through a pressure maintaining device, a heat preserving device and a moisture preserving device which are connected with the core storage tube. Before core drilling, the pressure maintaining capacity needs to be verified, so that a pressure resistance testing platform of the pressure maintaining cabin is produced.
The pressure resistance test platform of the pressure holding chamber generally comprises a pressure holding experiment chamber, a hydraulic system and the like, and the pressure holding performance of the pressure holding experiment chamber is verified by injecting high-pressure liquid into the pressure holding experiment chamber through the hydraulic system. The existing pressure resistance test platform can only perform pressure experiments, the real in-situ environment is usually a high-temperature environment, the existing pressure resistance test platform cannot simulate the high-temperature environment, and the pressure resistance of the pressure-maintaining cabin in the high-temperature environment cannot be verified.
In addition, the existing pressure maintaining experiment chamber is connected with a hydraulic pipeline by drilling a hole on the cylinder wall, and the drilling of the drilling machine can damage the pressure maintaining experiment chamber, so that the experiment result is unreliable.
Disclosure of Invention
The invention aims to provide a bellows type temperature control fidelity corer experiment platform which can simulate a high-temperature environment and is beneficial to improving the completeness and accuracy of an experiment.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a bellows type temperature control fidelity corer experiment platform comprises a box body, a temperature control system and a pressure experiment chamber used for simulating a fidelity chamber of a fidelity corer, wherein the pressure experiment chamber is arranged in the box body, and the box body is provided with an air inlet, an air outlet and a first reserved hole for an experiment pipeline to pass through;
the temperature control system comprises a fan heater assembly, and an outlet of the fan heater assembly is connected with the air inlet through an air inlet pipeline.
Further, install the governing valve on the air-supply line, the one end of air outlet connection air outlet pipeline, two branches are connected to the air outlet pipeline other end, all install the governing valve on two branches, and one of them branch road links to each other with the aspiration channel of electric fan heater subassembly, install the governing valve on the aspiration channel.
Furthermore, the other branch is connected with the air inlet pipeline, the side of the air inlet pipeline is connected with one end of an exhaust pipe, and the exhaust pipe is provided with a regulating valve.
Furthermore, a return pipeline is connected between the air suction pipe and the air exhaust pipe, and an adjusting valve is installed on the return pipeline.
Further, the outer barrel of the cabin body of the pressure experiment cabin comprises a first test piece, a second test piece and an intermediate connecting piece, the second test piece is located below the first test piece, the intermediate connecting piece connects the first test piece and the second test piece together, and a liquid injection hole is formed in the barrel wall of the intermediate connecting piece.
Preferably, the liquid injection hole is a threaded hole.
Further, the middle connecting piece is in threaded connection with the first test piece and the second test piece.
Further, a flap valve for realizing the sealing closing of the lower end of the pressure experiment chamber is arranged in the second experiment piece; the flap valve comprises a valve seat, a valve clack and an elastic part, one end of the valve clack is movably connected with the outer side wall of the upper end of the valve seat, and the top of the valve seat is provided with a valve port sealing surface matched with the valve clack.
Furthermore, the pressure experiment cabin also comprises a central rod and a core barrel, the lower end of the central rod extends into the core barrel, and a second preformed hole for lifting the central rod is arranged on the box body at a position axially opposite to the central rod;
the lower end of the central rod is provided with an outer step, the upper end of the core barrel is provided with an inner step matched with the outer step, and when the central rod is lifted upwards until the outer step is abutted against the inner step, the central rod can drive the core barrel to synchronously move upwards;
when the core barrel is positioned in the valve seat, the valve clack is opened by 90 degrees and is positioned between the core barrel and the second test piece; when the core barrel is lifted upwards to a certain height through the central rod, the valve clack returns to the top surface of the valve seat under the action of the elastic element and gravity to be in sealing contact with the valve port sealing surface;
when the central rod is lifted to the stroke end, the outer wall of the upper end of the core barrel is in sealing fit with the inner wall of the first test piece.
Further, bellows type temperature control fidelity corer experiment platform still includes the pull rod, pull rod one end is connected with well core rod.
Compared with the prior art, the invention has the following beneficial effects:
the invention can simulate high-temperature environment, can heat the pressure experiment chamber externally, can provide high-temperature environment for the pressure experiment chamber, and leads the experiment to be more complete and objective and the data to be more reliable;
2, the invention uses the middle connecting piece to connect the test piece, can avoid drilling on the test piece, and prevent the damage to the test piece, thereby reducing the pressure environment of the test piece, leading the test result to be more reliable, and improving the accuracy of the experiment.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a schematic view of the inside of a windbox;
FIG. 3 is a schematic diagram of a temperature control system of the present invention;
FIG. 4 is a schematic view of the pressure experiment chamber of the present invention;
FIG. 5 is a schematic view of the configuration of the holding pressure experiment chamber when the center pole is not lifted;
FIG. 6 is an enlarged view of a portion of FIG. 5 at A;
FIG. 7 is a schematic view of the configuration of the holding pressure test chamber when the center pole is lifted to the end of travel;
fig. 8 is a partial enlarged view at B in fig. 7;
FIG. 9 is a schematic view of the holding pressure experiment chamber when the outer cylinder is disassembled into an upper part and a lower part;
FIG. 10 is a schematic view of the construction of the intermediate link;
FIG. 11 is a schematic view of the pressure experiment chamber with the center pole not lifted;
FIG. 12 is a schematic diagram of the pressure test chamber configuration with the waveguide lifted to the end of travel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.
As shown in FIGS. 1 and 2, the bellows type temperature control fidelity corer experiment platform disclosed by the invention comprises a box body 81, a temperature control system 8 and a pressure experiment chamber 10 for simulating a fidelity chamber of a fidelity corer. The pressure experiment chamber 10 is arranged in a box body 81, a mounting seat 80 is arranged in the box body 81, and the pressure experiment chamber 10 is fixed on the mounting seat 80. Explosion-proof boxes can be selected as the box body 81.
The box 81 is provided with an air inlet 812, an air outlet 813 and a first preformed hole 810 for the experiment pipeline to pass through. The air inlet 812 and the air outlet 813 are disposed at opposite sides of the case 81.
As shown in fig. 1 and 3, the temperature control system 8 includes a fan heater assembly, the fan heater assembly includes a fan 88 and an electric air heater 87, an air inlet of the fan 88 is connected to the air suction pipe 84, and the air suction pipe 84 is provided with an adjusting valve.
The air outlet of the blower 88 is connected with the inlet of the electric air heater 87, the outlet of the electric air heater 87 is connected with one end of the air inlet pipeline 85, the other end of the air inlet pipeline 85 is connected with the air inlet 812 on the box body 81, and the air inlet pipeline 85 is provided with an adjusting valve. An inlet temperature sensor 814 is arranged at the inlet of the warm air blower assembly, an outlet temperature sensor 815 is arranged at the outlet of the warm air blower assembly, and a pressure sensor 816 is arranged on a connecting pipeline between the fan 88 and the air electric heater 87.
The air outlet 813 of box 81 connects the one end of air-out pipeline, and two branches of tee junction are passed through to the air-out pipeline other end, and two branches are first branch 89 and second branch 86 respectively, all install the governing valve on first branch 89 and the second branch 86, and first branch 89 links to each other with the aspiration channel 84 of electric fan heater subassembly, and second branch 86 links to each other with air-supply line 85, and the one end of exhaust pipe 82 is connected to air-supply line 85 side, installs the governing valve on the exhaust pipe 82. A return pipeline 83 is connected between the suction pipe 84 and the exhaust pipe 82, and a regulating valve is arranged on the return pipeline 83.
In another embodiment, the second branch 86 can be used as a discharge duct directly without the need to access the inlet duct 85.
The regulating valves on the pipelines of the temperature control system 8 are all electric valves, preferably electric butterfly valves.
The principle of temperature control of the invention is as follows:
firstly, opening the regulating valves on the air suction pipe 84, the air inlet pipeline 85 and the first branch 89, and closing the regulating valves on the air exhaust pipe 82 and the second branch 86;
the cold air enters the unit through the air suction pipe 84 under the power action of the fan 88, is heated when flowing through the air electric heater 87, then flows out of the unit, enters the air inlet pipeline 85, and enters the box body 81 through the air inlet 812, so that the pressure experiment chamber 10 in the box body 81 is heated externally, and the redundant air enters the fan heater assembly again through the air outlet 813, the air outlet pipe and the first branch 89 to be heated circularly.
The temperature sensor is installed in the pressure experiment chamber 10, and when the temperature in the pressure experiment chamber 10 reaches the preset temperature, the regulating valve on the return pipeline 83 can be opened to a certain opening degree, so that the hot air entering the box body 81 is reduced, and the temperature is maintained to be basically constant.
When the exhaust and temperature reduction are needed, the adjusting valves on the air suction pipe 84, the air inlet pipeline 85, the exhaust pipe 82 and the second branch 86 are opened, the adjusting valve on the first branch 89 is closed, and meanwhile, the power supply of the air electric heater 87 is closed;
the cold air enters the unit through the air suction pipe 84 under the power action of the fan 88, is not heated when flowing through the air electric heater 87, then flows out of the unit, enters the air inlet pipeline 85, and enters the box body 81 through the air inlet 812, so that the hot air in the box body 81 is replaced and taken away, the pressure experiment chamber 10 in the box body is cooled, and the air in the box body 81 is exhausted to the outside through the air outlet 813, the air outlet pipe, the second branch 86 and the exhaust pipe 82.
The structure of the pressure experiment chamber in this embodiment will be described in detail.
The pressure experiment chamber 10 has various structures, and can be any pressure chamber structure which can provide a sealed space. The invention provides a split type pressure experiment cabin structure which comprises a test piece and a connecting piece.
As shown in fig. 4, the split type pressure experiment chamber 10 comprises a first experiment piece 11, a second experiment piece 12 and an intermediate connection piece 13, wherein the intermediate connection piece 13 is of a cylindrical structure, a liquid injection hole 14 is formed in the wall of the intermediate connection piece 13, and the liquid injection hole 14 is used for being externally connected with a hydraulic source, so that a test piece can be prevented from being drilled, and the test piece is prevented from being damaged. To facilitate connection to the fluid line, the fluid injection port 14 is a threaded hole.
The invention uses the middle connecting piece 13 to connect the test piece, can avoid drilling on the test piece, prevent the test piece from being damaged, and can improve the accuracy of the experiment.
As shown in FIG. 1, when the pressure experiment chamber 10 is installed in the housing 81, the liquid injection hole 14 is aligned with the first reserved hole 810 of the housing 81.
In this embodiment, the first test piece 11 is the upper end of the outer cylinder of the holding pressure test chamber, and the second test piece 12 is the lower end of the outer cylinder of the holding pressure test chamber. The whole pressure maintaining experiment cabin is a test piece.
As shown in fig. 5-8, the pressure-maintaining test chamber in the present embodiment includes an outer cylinder 1, a central rod 2, a core barrel 3, and a flap valve 5 for sealing and closing the lower end of the pressure-maintaining test chamber.
The outer cylinder 1 is formed by assembling a plurality of threaded sleeves and is used for simulating a drilling machine outer cylinder of the in-situ fidelity coring device. The flap valve 5 comprises a valve seat 51, a valve clack 52 and an elastic part 53, one end of the valve clack 52 is movably connected with the outer side wall of the upper end of the valve seat 51, and the top of the valve seat 51 is provided with a valve port sealing surface matched with the valve clack 52. The elastic member 53 is a spring or a torsion spring.
The lower end of the central rod 2 extends into the core barrel 3, the lower end of the central rod 2 is provided with an outer step 23, the upper end of the core barrel 3 is provided with an inner step 32 matched with the outer step 23, and when the central rod 2 is lifted upwards until the outer step 23 abuts against the inner step 32, the central rod 2 can drive the core barrel 3 to move upwards synchronously. Meanwhile, due to the abutting of the outer step 23 and the inner step 32, sealing can be formed between the outer wall of the central rod 2 and the inner wall of the core barrel 3 at the abutting part.
As shown in fig. 5 and 9, in the present embodiment, the outer cylinder 1 of the holding pressure test chamber is separated into a first test piece 11 and a second test piece 12 from the screw connection portion of the outer cylinder 1. One end of the intermediate connecting piece 13 is an internal thread, and the other end is an external thread, so as to realize the threaded connection with the first test piece 11 and the second test piece 12. And a sealing ring 22 is arranged between the middle connecting piece 13 and the first test piece 11 and the second test piece 12, and the sealing performance can be improved by the thread sealing and the sealing ring sealing.
As shown in fig. 5, 6 and 11, in the initial state, the core barrel 3 is positioned at the lower end of the outer cylinder 1 and in the valve seat 51. When the core barrel 3 is located in the valve seat 51, the valve flap 52 opens 90 ° and is located between the core barrel 3 and the second test piece 12; when the core barrel 3 is lifted upwards to a certain height by the central rod 2, the valve clack 52 returns to the top surface of the valve seat 51 under the action of the elastic element 53 and gravity to be in sealing contact with the valve port sealing surface, and the closing of the regulating valve is realized.
As shown in fig. 7, 8 and 12, when the central rod 2 continues to be lifted upward to the end of the stroke, the outer wall of the upper end of the core barrel 3 is in sealing engagement with the inner wall of the first test piece 11.
Two sealing rings 22 are arranged on the outer wall of the upper end of the core barrel 3 to realize sealing with the barrel wall of the first test piece 11. At this time, the outer wall of the central rod 2 and the inner wall of the core barrel 3 form a seal at the abutting part of the outer step 23 and the inner step 32, thereby completing the sealing of the upper end of the outer barrel 1. The lower end of the outer cylinder 1 is closed by a flap valve 5, so that a sealed space for storing a rock core is formed in the outer cylinder 1.
The inner wall of the first test piece 11 is provided with a first limit step 16 for axially limiting the core barrel 3, and when the upper end surface 21 of the core barrel abuts against the first limit step 16, the center rod 2 is lifted to the stroke end.
In order to increase the sealing specific pressure of the flap valve 5, the pressure experiment chamber 10 further comprises a trigger mechanism 4, the trigger mechanism 4 comprises a trigger inner cylinder 41, a trigger block 42 and a trigger spring 43, a through hole is formed in the side wall of the trigger inner cylinder 41, the trigger block 42 is placed in the through hole, and a protruding part 31 matched with the trigger block 42 is arranged on the outer side wall of the bottom of the core cylinder 3; the inner wall of the second test piece 12 is provided with a bypass opening 15 matched with the trigger block 42, the trigger block 42 is positioned above the valve clack 52, and the bypass opening 15 is positioned above the trigger block 42. The bottom of the avoiding opening 15 is provided with a guiding inclined plane which is convenient for the trigger block 42 to slide into the avoiding opening 15 from bottom to top and is also convenient for the trigger block 42 to slide out of the avoiding opening 15 from top to bottom.
The trigger spring 43 is sleeved outside the trigger inner cylinder 41, a shoulder 44 is arranged on the outer wall of the trigger inner cylinder 41, the trigger spring 43 is compressed between the shoulder 44 and the step surface of the inner wall of the second test piece 12, and the trigger spring 43 is positioned above the trigger block 42;
when the core barrel 3 is positioned in the valve seat 51, the trigger inner barrel 41 is positioned between the core barrel 3 and the second test piece 12, the lower end of the trigger inner barrel 41 is matched with a spigot of the valve seat 51, and the trigger block 42 protrudes out of the inner side wall of the trigger inner barrel 41;
when the core barrel 3 is lifted upwards to the first height, the convex part 31 of the core barrel 3 supports against the trigger block 42, so that the trigger inner barrel 41 can be driven to move upwards synchronously;
when the core barrel 3 is continuously lifted upwards to the second height, the trigger block 42 is pushed into the avoidance port 15 by the convex portion 31, so that the trigger block 42 avoids the convex portion 31;
when the core barrel 3 is lifted up to the bottom of the core barrel 3 to cross the avoidance port 15, the trigger block 42 loses the acting force of the core barrel 3, and the trigger inner cylinder 41 drives the trigger block 42 to fall back to press the closed valve clack 52 under the action of gravity and the trigger spring 43.
As shown in fig. 1 and 2, a second prepared hole 811 for pulling the center rod 2 is provided on the case 81 at a position axially opposite to the center rod 2. During the test, be connected pull rod 7 one end with well core rod 2, the pull rod 7 other end passes through second preformed hole 811 and can be connected with outside well core rod actuating mechanism, can test well core rod 2 and flap valve 5 action reliably through promoting well core rod 2. The driving mechanism can be selected from a hydraulic cylinder or an air cylinder, and a piston rod of the hydraulic cylinder or the air cylinder is connected with the pull rod 7.
In use, a high-pressure pipeline of an external pressure supply system is connected with the liquid injection hole 14 on the intermediate connecting member 13 through the first reserved hole 810 on the box body 81.
Lifting the central rod 2 to the stroke end point through a driving mechanism, sealing the inner wall of the core barrel 3 and the central rod 2, and sealing and matching the outer wall of the core barrel 3 and the first test piece 11 to complete the sealing of the upper end of the outer barrel 1; the lower end flap valve 5 realizes the sealing closing of the bottom of the outer cylinder 1, so that a closed environment is formed in the pressure maintaining experiment chamber; then, the center rod 2 is kept at the end of the upper stroke;
then, injecting high-pressure liquid into the closed environment through an external pressure supply system, wherein high-pressure oil or water provided by the external pressure supply system enters an annular space between the outer barrel 1 and the core barrel 3 through a liquid injection hole 14 on the intermediate connecting piece 13, so that the whole closed environment is gradually filled, and the in-situ pressure environment is simulated;
meanwhile, the temperature control system 8 is started to externally heat the pressure experiment chamber 10, and the in-situ temperature environment is simulated.
After the specified time of pressurize heat preservation, the system carries out safe pressure release and cooling, and the specified time of pressurize heat preservation sets up according to the experiment needs.
The invention can heat and pressurize the pressure-maintaining experiment chamber, can simulate high-pressure and high-temperature environment, and has more complete and objective experiment and more reliable data. The deformation conditions of the cylinder walls of the first test piece 11 and the second test piece 12 can be monitored in the experimental process, and the strength design of the cylinder walls of the first test piece 11 and the second test piece 12 can be verified, so that the fidelity core drilling machine can be structurally and materially improved.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that all such changes and modifications as fall within the true spirit and scope of the invention be considered as within the following claims.
Claims (10)
1. The utility model provides a bellows type temperature control fidelity corer experiment platform, is including the pressure experiment cabin that is used for simulating fidelity corer fidelity cabin, its characterized in that: the pressure experiment chamber is arranged in the box body, and the box body is provided with an air inlet, an air outlet and a first preformed hole for an experiment pipeline to pass through;
the temperature control system comprises a fan heater assembly, and an outlet of the fan heater assembly is connected with the air inlet through an air inlet pipeline.
2. The bellows type temperature control fidelity corer experimental platform of claim 1, characterized in that: install the governing valve on the air-supply line, the one end of air outlet connection air outlet pipeline, two branches are connected to the air outlet pipeline other end, all install the governing valve on two branches, and one of them branch road links to each other with the aspiration channel of electric fan heater subassembly, install the governing valve on the aspiration channel.
3. The bellows type temperature control fidelity corer experimental platform of claim 2, characterized in that: the other branch is connected with the air inlet pipeline, the side of the air inlet pipeline is connected with one end of an exhaust pipe, and an adjusting valve is installed on the exhaust pipe.
4. The bellows type temperature control fidelity corer experimental platform of claim 3, characterized in that: a return pipeline is connected between the air suction pipe and the air exhaust pipe, and an adjusting valve is installed on the return pipeline.
5. The bellows type temperature control fidelity corer experimental platform of claim 1, characterized in that: the outer barrel of the cabin body of the pressure experiment cabin comprises a first test piece, a second test piece and an intermediate connecting piece, wherein the second test piece is positioned below the first test piece, the intermediate connecting piece connects the first test piece and the second test piece together, and a liquid injection hole is formed in the barrel wall of the intermediate connecting piece.
6. The bellows type temperature control fidelity corer experimental platform of claim 5, characterized in that: the liquid injection hole is a threaded hole.
7. The bellows type temperature control fidelity corer experimental platform of claim 5, characterized in that: the middle connecting piece is in threaded connection with the first test piece and the second test piece.
8. The bellows type temperature control fidelity corer experimental platform of claim 1, characterized in that: a flap valve used for realizing the sealing closing of the lower end of the pressure experiment cabin is arranged in the second experiment piece; the flap valve comprises a valve seat, a valve clack and an elastic part, one end of the valve clack is movably connected with the outer side wall of the upper end of the valve seat, and the top of the valve seat is provided with a valve port sealing surface matched with the valve clack.
9. The bellows type temperature control fidelity corer experimental platform of claim 8, characterized in that: the pressure experiment cabin also comprises a central rod and a core barrel, the lower end of the central rod extends into the core barrel, and a second reserved hole for lifting the central rod is arranged on the box body at a position axially opposite to the central rod;
the lower end of the central rod is provided with an outer step, the upper end of the core barrel is provided with an inner step matched with the outer step, and when the central rod is lifted upwards until the outer step is abutted against the inner step, the central rod can drive the core barrel to synchronously move upwards;
when the core barrel is positioned in the valve seat, the valve clack is opened by 90 degrees and is positioned between the core barrel and the second test piece; when the core barrel is lifted upwards to a certain height through the central rod, the valve clack returns to the top surface of the valve seat under the action of the elastic element and gravity to be in sealing contact with the valve port sealing surface;
when the central rod is lifted to the stroke end, the outer wall of the upper end of the core barrel is in sealing fit with the inner wall of the first test piece.
10. The bellows type temperature control fidelity corer experimental platform of claim 9, characterized in that: the pull rod is characterized by further comprising a pull rod, and one end of the pull rod is connected with the central rod.
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| CN113882824A (en) * | 2021-03-11 | 2022-01-04 | 四川大学 | Core high temperature high pressure simulation test platform is got in deep |
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