CN212275288U - Ultra-high pressure simulation experiment system of fidelity coring device - Google Patents

Abstract

The utility model relates to a fidelity corer superhigh pressure simulation experiment system, which comprises a pressure supply unit, a heat source supply unit, a high-temperature hyperbaric chamber, a data acquisition unit and a control unit, wherein the high-temperature hyperbaric chamber comprises an incubator and a pressure experiment chamber arranged in the incubator, and the incubator is provided with a medium inlet, a medium outlet and a first preformed hole for an experiment pipeline to pass through; the pressure supply unit is connected with the pressure experiment chamber through a pipeline so as to adjust the pressure in the pressure chamber; the heat source supply unit is connected with the incubator through a pipeline so as to adjust the temperature of the pressure experiment chamber, and the pressure supply unit, the heat source supply unit and the data acquisition unit are all connected with the control unit. The utility model discloses be provided with pressure feed unit and heat source supply unit, can simulate high temperature high pressure environment, verify the pressurize ability of pressurize experiment cabin under the high temperature high pressure condition, can improve the integrality of experiment, more do benefit to the not enough of discovery corer fidelity cabin to help improving corer fidelity cabin.

Description

Ultra-high pressure simulation experiment system of fidelity coring device

Technical Field

The utility model relates to a get core experimental apparatus technical field, especially relate to a fidelity corer superhigh pressure simulation experiment system.

Background

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.

After the drilling machine obtains a sample, the sample needs to be subjected to pressure maintaining and sealing by a pressure maintaining control device of the fidelity cabin. The pressure maintaining performance of the fidelity cabin needs to be continuously verified and improved through tests, so that a pressure maintaining characteristic test platform needs to be designed to test the pressure resisting characteristic of the pressure maintaining cabin, and test basis and data support are provided for research and development and design of the fidelity core drilling machine. However, the existing pressure maintaining characteristic test platform lacks the simulation of the in-situ temperature environment, and the pressure resistance of the pressure maintaining cabin in the 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.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fidelity corer superhigh pressure simulation experiment system can simulate high temperature high pressure environment, does benefit to integrality and the accuracy that improves the experiment.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an ultrahigh pressure simulation experiment system of a fidelity corer comprises a pressure supply unit, a heat source supply unit, a high-temperature high-pressure cabin, a data acquisition unit and a control unit, wherein the high-temperature high-pressure cabin comprises an incubator and a pressure experiment cabin arranged in the incubator, and the incubator is provided with a medium inlet, a medium outlet and a first reserved hole for an experiment pipeline to pass through;

the pressure supply unit is connected with the pressure experiment chamber through a pipeline so as to adjust the pressure in the pressure chamber; the heat source supply unit is connected with the incubator through a pipeline so as to adjust the temperature of the pressure experiment chamber, and the pressure supply unit, the heat source supply unit and the data acquisition unit are all connected with the control unit.

Further, the pressure supply unit includes liquid tank and frequency conversion superhigh pressure plunger pump, and the export of liquid tank passes through the pipeline and links to each other with the entry of frequency conversion superhigh pressure plunger pump, the export of frequency conversion superhigh pressure plunger pump passes through the pipeline and links to each other with the one end of high-pressure pipe, and the other end of high-pressure pipe passes first preformed hole on the incubator is connected with the pressure experiment cabin.

Further, the heat source supply unit comprises a fan heater assembly, and an outlet of the fan heater assembly is connected with the medium inlet through an air inlet pipeline.

Furthermore, install the governing valve on the air-supply line, the one end of air outlet pipeline is connected to the medium export, two branches are connected to the air outlet pipeline other end, all install the governing valve on two branches, and one of them branch links to each other with the aspiration channel of electric fan heater subassembly, install the governing valve on the aspiration channel.

The data acquisition unit comprises a pressure sensor and a temperature sensor, the outlet of the pressure supply unit is provided with the pressure sensor and/or the pressure sensor is arranged in the pressure experiment chamber; and a temperature sensor is arranged in the incubator and/or the pressure experiment cabin.

Further, the outer barrel of the pressure experiment cabin comprises a first test piece, a second test piece and an intermediate connecting piece, wherein the intermediate connecting piece is of a cylindrical structure; the first test piece and the second test piece are connected through an intermediate connecting piece, and a liquid injection hole is formed in the wall of the intermediate connecting piece.

Furthermore, a temperature sensor is arranged on the inner wall of the middle connecting piece.

Furthermore, the pressure experiment chamber also comprises a central rod and a core barrel, a flap valve for realizing the sealing closing of the lower end of the pressure maintaining experiment chamber is installed in the second experiment piece, the flap valve comprises a valve seat, a valve clack and an elastic piece, and one end of the valve clack is movably connected with the outer side wall of the upper end of the valve seat;

the lower end of the central rod extends into the core barrel, and a second reserved hole for lifting the central rod is formed in the position, opposite to the central rod, of the box body in the axial direction;

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, fidelity corer superhigh pressure simulation experiment system still is including being used for driving well core rod axial displacement's sharp actuating mechanism, sharp actuating mechanism fixed mounting is outside the incubator, sharp actuating mechanism's output member with well core rod links to each other in order to drive well core rod axial linear displacement.

Furthermore, a tension testing device is arranged between the output part of the linear driving mechanism and the central rod.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model is provided with a pressure supply unit and a heat source supply unit, which can simulate high temperature and high pressure environment, verify the pressure maintaining capability of the pressure maintaining experiment chamber under high temperature and high pressure, improve the integrity of the experiment, and is more beneficial to finding the shortage of the coring device fidelity chamber, thereby being beneficial to improving the coring device fidelity chamber;

2, the utility model discloses utilize the intermediate junction spare to link up the upper end and the lower extreme in pressurize experiment cabin, can avoid boring on the pressurize test cabin, prevent to cause the harm to the pressurize test cabin, can improve the accuracy of experiment.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural diagram of a pressure supply unit according to the present invention;

FIG. 3 is a schematic structural view of a heat source supply unit in the first embodiment;

FIG. 4 is a schematic view of the configuration of the holding pressure experiment chamber when the center pole is not lifted;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

FIG. 6 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. 7 is a partial enlarged view at B in FIG. 6;

FIG. 8 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. 9 is a schematic view of the construction of the intermediate link;

FIG. 10 is a schematic view of a pressure experiment chamber according to a second embodiment;

fig. 11 is a schematic structural view of a heat source supply unit in the third embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

Implementation mode one

As shown in fig. 1, 2, and 3, the system for simulating the ultra-high pressure of the fidelity coring apparatus according to the present embodiment includes a pressure supply unit 6, a heat source supply unit 8, a high-temperature high-pressure cabin, a data acquisition unit, and a control unit 100. The high-temperature high-pressure chamber comprises an incubator 9 and a pressure experiment chamber 10 arranged in the incubator 9, wherein the incubator 9 is provided with a medium inlet 92, a medium outlet 93 and a first preformed hole 91 for an experiment pipeline to pass through. The positions of the medium inlet 92 and the medium outlet 93 are set as needed, and the medium inlet 92 and the medium outlet 93 are set on the opposite side of the incubator 9 in this embodiment.

The pressure supply unit 6 is connected with the pressure experiment chamber 10 through a pipeline to adjust the pressure in the pressure chamber 2, so as to realize the simulation of the in-situ high-pressure environment. The heat source supply unit 8 is connected with the incubator 9 through a pipeline to adjust the temperature of the pressure experiment chamber 10, so that the simulation of the in-situ high-temperature environment is realized. The pressure supply unit 6, the heat source supply unit 8 and the data acquisition unit are all connected with the control unit 100.

As shown in fig. 1 and 2, in the present embodiment, the pressure supply unit 6 includes a liquid tank 61 and a variable-frequency ultrahigh-pressure plunger pump 64, an outlet of the liquid tank 61 is connected to an inlet of the variable-frequency ultrahigh-pressure plunger pump 64 through a first pipeline, an outlet of the variable-frequency ultrahigh-pressure plunger pump 64 is connected to one end of a high-pressure pipe 612 through a second pipeline 610, and the other end of the high-pressure pipe 612 passes through a first reserved hole 91 on the incubator 9 and is connected to the pressure experiment chamber 10.

The inlet and outlet of the variable-frequency ultrahigh-pressure plunger pump 64 are respectively provided with a first valve 62 and a second valve 66. The inlet of the variable-frequency ultrahigh-pressure plunger pump 64 is also provided with a liquid filter 63, and the second pipeline 610 is also provided with the liquid filter 63. Two discharge pipes are branched from the second pipeline 610, the two discharge pipes are respectively connected with the second pipeline 610 side through a tee joint, one of the discharge pipes is provided with a third valve 68, and the other discharge pipe is provided with a fourth valve 69. The third valve 68 and the fourth valve 69 are normally closed valves. Of course, the variable frequency ultra-high pressure plunger pump 64 is provided with an oil return line, and the oil return line is provided with a sixth valve 65.

The first valve 62 is a manual ball valve, the second valve 66, the third valve 68 and the sixth valve 65 are all pneumatic stop valves, and the fourth valve 69 is a manual valve.

The second pipeline 610 is provided with a safety valve 611, and when the pressure is too high, the safety valve 611 is automatically opened to release the pressure, so that the experimental safety is ensured. Pressure sensors 613 are installed at the outlet of the variable frequency ultrahigh pressure plunger pump 64 and the outlet of the pressure supply unit 6, and are used for measuring the pressure in the system.

As shown in fig. 1 and 3, the heat source supply unit 8 in this embodiment includes a fan heater assembly, the fan heater assembly includes a fan 81 and an electric air heater 87, an air suction inlet of the fan 81 is connected to an air suction pipe 84, and an adjusting valve is installed on the air suction pipe 84.

The air outlet of the fan 81 is connected with the inlet of the air electric heater 87, the outlet of the air electric 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 medium inlet 92 on the incubator 9, and the air inlet pipeline 85 is provided with an adjusting valve. Temperature sensors 810 are installed at the inlet and the outlet of the warm air blower assembly, and a pressure sensor 613 is installed on a connecting pipeline between the fan 81 and the air electric heater 87.

The medium outlet 93 of the warm box 9 is connected with one end of an air outlet pipeline 88, the other end of the air outlet pipeline 88 is connected with two branches through a tee joint, the two branches are a first branch 89 and a second branch 86 respectively, regulating valves are installed on the first branch 89 and the second branch 86, the first branch 89 is connected with an air suction pipe 84 of a fan heater assembly, the second branch 86 is connected with an air inlet pipeline 85, one end of an exhaust pipe 82 is connected to the side of the air inlet pipeline 85, and the regulating valve is installed 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. The control valves on the pipes of the heat source supply unit 8 are all electrically operated valves, preferably electrically operated butterfly valves.

In another embodiment, the second branch 86 can be used as a discharge duct directly without the need to access the inlet duct 85.

Principle of temperature control in this embodiment:

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 81, 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 incubator 9 through the medium inlet 92, so that the pressure experiment chamber 10 in the incubator 9 is heated externally, and the redundant air enters the fan heater assembly again through the medium outlet 93, the air outlet pipe and the first branch 89 for circular heating.

The pressure experiment chamber 10 and/or the incubator 9 are/is provided with a temperature sensor, and when the preset temperature is reached, the regulating valve on the return pipeline 83 can be opened to a certain opening degree, so that the hot air entering the incubator 9 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 81, 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 incubator 9 through the medium inlet 92, so that the hot air in the incubator 9 is replaced and taken away, the pressure experiment chamber 10 in the incubator 9 is cooled, and the air in the incubator 9 is exhausted to the outside through the medium outlet 93, the air outlet pipe, the second branch 86 and the exhaust pipe 82.

The data acquisition unit includes a pressure sensor 613 and a temperature sensor, which may implement feedback pressure and temperature. In the present embodiment, the control unit 100 includes a computer system for remote control, and is capable of displaying test data in real time and remotely controlling the pressure supply unit 6 and the heat source supply unit 8 in real time.

As shown in fig. 4-7, the pressure experiment chamber 10 in the present embodiment directly adopts a pressure maintaining experiment chamber, and the pressure maintaining experiment chamber includes an outer cylinder 1, a central rod 2, a core barrel 3 and a flap valve 5 for realizing the sealing closing of the lower end of the experiment chamber.

The pressure maintaining experiment chamber comprises an outer cylinder 1 which is a chamber body of the pressure experiment chamber 10. 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. The sealing properties of the abutment are related to the axial pressure between the core rod 2 and the core barrel 3. The axial pressure between the central rod 2 and the core barrel 3 is determined by the tension exerted on the central rod 2. The tensile force applied to the center rod 2 can be tested by the tensile force testing device 81, and the sealing performance of the pressure experiment chamber 10 under different tensile force conditions can be verified.

As shown in fig. 4 and 5, 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 positioned in the valve seat 51, the valve flap 52 is opened by 90 ° and is positioned between the core barrel 3 and the outer barrel 1; 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 valve is closed.

As shown in fig. 6 and 7, when the central rod 2 continues to be lifted upwards to the end of the stroke, the outer wall of the upper end of the core barrel 3 is in sealing fit with the inner wall of the outer barrel 1. Two sealing rings 22 are arranged on the outer wall of the upper end of the core barrel 3 to realize the sealing with the barrel wall of the outer barrel 1. 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 outer barrel 1 is provided with a first limiting step 16 for axially limiting the core barrel 3, and when the upper end surface 21 of the core barrel abuts against the first limiting step 16, the center rod 2 is lifted to the stroke end point.

In order to increase the sealing specific pressure of the flap valve 5, the pressure maintaining experiment chamber 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 portion 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 outer cylinder 1 is provided with an avoiding opening 15 matched with the trigger block 42, the trigger block 42 is positioned above the valve clack 52, and the avoiding 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, the outer wall of the trigger inner cylinder 41 is provided with a shoulder 44, the trigger spring 43 is compressed between the shoulder 44 and the step surface of the inner wall of the outer cylinder 1, 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 outer barrel 1, 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.

In order to perform the pressure-proof test, a high-pressure liquid needs to be injected into the holding pressure test chamber. This embodiment requires a drilling machine to drill a hole in the side wall of the outer cylinder 1 as the liquid injection hole 14 to achieve connection with the high-pressure pipe 612. To facilitate connection to the high pressure tube 612, the liquid injection hole 14 is a threaded hole.

As shown in fig. 1, the ultrahigh pressure simulation experiment system of the fidelity coring device further comprises a linear driving mechanism 7 for driving the central rod 2 to move axially, the linear driving mechanism 7 is fixedly installed outside the incubator 9, and the incubator 9 is provided with a second preformed hole 94 corresponding to the linear driving mechanism 7. The output part of the linear driving mechanism 7 passes through the second preformed hole 94 to be connected with the central rod 2 so as to drive the central rod 2 to axially and linearly move.

A tension testing device 70 is arranged between the output part of the linear driving mechanism 7 and the central rod 2, so that the sealing effect of the pressure maintaining experiment chamber under different tension conditions can be verified;

the tensile testing device 70 may be selected from a tensile gauge. The linear driving mechanism 7 can be a cylinder, a hydraulic cylinder or a linear motor. Taking the linear driving mechanism 7 as a hydraulic cylinder as an example, the cylinder body of the hydraulic cylinder is fixedly connected with the outside of the incubator 9, the output part of the hydraulic cylinder is a piston rod, one end of the tension testing device 81 is in threaded connection with the piston rod, and the other end of the tension testing device 81 is in threaded connection with the central rod 2.

As shown in fig. 1 and 2, if the linear driving mechanism 7 is a hydraulic cylinder, the pressure supply unit 6 may also supply a power source to the hydraulic cylinder. The hydraulic cylinder is a double-acting hydraulic cylinder, a branch pipe is connected to the upstream of the variable-frequency ultrahigh-pressure plunger pump 64 and connected with one oil hole of the hydraulic cylinder, a branch pipe is connected to the downstream of the variable-frequency ultrahigh-pressure plunger pump 64 and connected with the other oil hole of the hydraulic cylinder, a fifth valve 67 is mounted on the second pipeline 610, and the fifth valve 67 is located at the downstream of the liquid supply branch pipe of the hydraulic cylinder. The action of the hydraulic cylinder is controlled by pushing and pulling the variable-frequency ultrahigh-pressure plunger pump 64, so that the lifting and resetting of the central rod 2 are realized.

When the variable-frequency ultrahigh-pressure plunger pump is used, the fifth valve 67 is closed, so that the variable-frequency ultrahigh-pressure plunger pump 64 supplies liquid medium to the hydraulic cylinder, and the central rod 2 is lifted to the stroke end point through the hydraulic cylinder; then, closing valves at two oil holes of the hydraulic cylinder to keep the central rod 2 at the end point of the upper stroke;

then, the fifth valve 67 is opened, and the oil or water in the liquid tank 61 is pumped to the high-pressure pipe 612 through the variable-frequency ultrahigh-pressure plunger pump 64 and enters the annular space between the outer cylinder 1 and the core barrel 3 through the liquid injection hole 14, so that the whole sealed environment is gradually filled;

meanwhile, the heat source supply unit 8 is started to externally heat the pressure experiment chamber 10 in the incubator 9, so that a high-temperature high-pressure environment is formed in the pressure experiment chamber 10, and the simulation of the in-situ environment temperature is realized.

After the specified time of pressurize, the system carries out safe pressure release and cooling, and the specified time of pressurize sets up according to the experiment needs. The deformation condition of the cylinder wall of the pressure maintaining experiment chamber can be monitored in the process, and the strength design of the cylinder wall of the pressure maintaining experiment chamber is verified, so that the fidelity coring drilling machine is improved structurally and materially.

The utility model discloses a frequency conversion superhigh pressure plunger pump 64 can carry out 0-140 MPa's continuous pressure test to pressurize experiment cabin. The heat source supply unit 8 can heat the pressure experiment chamber 10 externally, so that a high-temperature environment is formed inside the pressure experiment chamber, the sealing performance of the pressure maintaining experiment chamber in the high-temperature and high-pressure environment can be verified, the experiment is more complete, the defect of the coring device fidelity chamber can be found more conveniently, and the improvement of the coring device fidelity chamber is facilitated.

Second embodiment

In the first embodiment, the pressure-maintaining and compacting test chamber is connected with a hydraulic pipeline by drilling a hole in the cylinder wall, and the drilling of the drilling machine can damage the pressure-maintaining test chamber, so that the test result is unreliable.

As shown in fig. 8, 9 and 10, the pressure experiment chamber 10 of the present embodiment includes a first experiment piece 11, a second experiment piece 12 and an intermediate connecting member 13, wherein the first experiment piece 11 is the upper end of the outer cylinder 1 of the pressure holding experiment chamber, the second experiment piece 12 is the lower end of the outer cylinder 1 of the pressure holding experiment chamber, and the intermediate connecting member 13 has a cylindrical structure; first experiment piece 11 links to each other through middle connecting piece 13 with second experiment piece 12, and liquid filling hole 14 is located on the section of thick bamboo wall of middle connecting piece 13 for external hydraulic pressure source, thereby can avoid drilling on the experiment piece, prevent to cause the harm to the experiment piece.

As shown in fig. 8, 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 joint of the outer cylinder 1. The first limit step 16 is positioned on the first test piece 11, and the flap valve 5 and the trigger mechanism 4 are positioned on the second test piece 12. When the central rod 2 is lifted to the stroke end, the outer wall of the upper end of the core barrel 3 is in sealing fit with the inner wall of the first test piece 11.

One end of the middle 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 experimental piece 11 and the second experimental piece 12. And sealing rings are arranged between the middle connecting piece 13 and the first experimental piece 11 and the second experimental piece 12, and the sealing performance can be improved by the thread sealing and the sealing of the sealing rings.

And a temperature sensor is arranged on the inner wall of the middle connecting piece 13 to detect the temperature inside the pressure experiment chamber 10.

This embodiment utilizes the intermediate junction spare to link up the upper end and the lower extreme in pressurize experiment cabin, can avoid drilling on the experimental part, prevents to cause the harm to the experimental part, therefore can restore the pressure environment of experimental part for the test result is more reliable, does benefit to the accuracy that improves the experiment.

Third embodiment

This embodiment differs from the first and second embodiments in that: the heat source supply unit 8 is different. As shown in fig. 11, the heat source supply unit 8 in this embodiment includes a liquid supply system including an oil tank 801 and a pump 802, an outlet of the oil tank 801 is connected to an inlet of the pump 802, an outlet of the pump 802 is connected to an inlet of the electric heater 805, and an outlet of the electric heater 805 is connected to the medium inlet 92 of the incubator 9 through a liquid inlet line 803.

The medium outlet 93 of the warm box 9 is connected with one end of the liquid outlet pipe 804, and the other end of the liquid outlet pipe 804 is connected with the oil tank 801. A connecting pipeline between the pump 802 and the electric heater 805 is provided with a filter, a pressure gauge, a safety valve 611 and an external discharge pipeline.

A return line is provided between the pump 802 and the electric heater 805, which leads to a tank 801. The pump 802 may alternatively be a variable frequency pump, and the fluid flow rate may be controlled by varying the speed of the pump.

The utility model discloses temperature control's principle:

oil or water in the oil tank 801 is heated when flowing through the electric heater 805 under the action of the pump 802, then enters the liquid inlet pipeline 803, and enters the incubator 9 through the liquid inlet 812, so that the pressure experiment chamber 10 in the incubator 9 is heated externally, and redundant liquid returns to the oil tank 801 through the medium outlet 93 and the liquid outlet pipeline 804, thereby forming a closed cycle.

A temperature sensor is arranged in the pressure experiment chamber 10, and when the temperature in the pressure experiment chamber 10 reaches a preset temperature, the electric heater 805 is turned off; when the temperature drops to a preset value, the electric heater 805 is turned on, so that the temperature of the pressure experiment chamber 10 is maintained within a certain range.

The utility model discloses be provided with pressure feed unit and heat source supply unit, can simulate high temperature high pressure environment, verify the pressurize ability of pressurize experiment cabin under the high temperature high pressure condition, can improve the integrality of experiment, more do benefit to the not enough of discovery corer fidelity cabin to help improving corer fidelity cabin.

Of course, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and that such changes and modifications are intended to be included within the scope of the appended claims.

Claims (10)

1. The utility model provides a fidelity corer superhigh pressure simulation experiment system which characterized in that: the device comprises a pressure supply unit, a heat source supply unit, a high-temperature high-pressure cabin, a data acquisition unit and a control unit, wherein the high-temperature high-pressure cabin comprises an incubator and a pressure experiment cabin arranged in the incubator, and the incubator is provided with a medium inlet, a medium outlet and a first preformed hole for an experiment pipeline to pass through;

the pressure supply unit is connected with the pressure experiment chamber through a pipeline so as to adjust the pressure in the pressure chamber; the heat source supply unit is connected with the incubator through a pipeline so as to adjust the temperature of the pressure experiment chamber, and the pressure supply unit, the heat source supply unit and the data acquisition unit are all connected with the control unit.

2. The fidelity corer ultrahigh pressure simulation experiment system of claim 1, characterized in that: the pressure supply unit comprises a liquid tank and a variable-frequency ultrahigh-pressure plunger pump, the outlet of the liquid tank is connected with the inlet of the variable-frequency ultrahigh-pressure plunger pump through a pipeline, the outlet of the variable-frequency ultrahigh-pressure plunger pump is connected with one end of a high-pressure pipe through a pipeline, and the other end of the high-pressure pipe penetrates through a first preformed hole in the incubator and is connected with the pressure experiment cabin.

3. The fidelity corer ultrahigh pressure simulation experiment system of claim 1 or 2, characterized in that: the heat source supply unit comprises a fan heater assembly, and an outlet of the fan heater assembly is connected with the medium inlet through an air inlet pipeline.

4. The fidelity corer ultrahigh pressure simulation experiment system of claim 3, characterized in that: the air inlet pipe is provided with a regulating valve, the medium outlet is connected with one end of the air outlet pipeline, the other end of the air outlet pipeline is connected with two branches, the two branches are provided with the regulating valve, one branch is connected with the air suction pipe of the fan heater assembly, and the air suction pipe is provided with the regulating valve.

5. The fidelity corer ultrahigh pressure simulation experiment system of claim 1, characterized in that: the data acquisition unit comprises a pressure sensor and a temperature sensor, the outlet of the pressure supply unit is provided with the pressure sensor and/or the pressure sensor is arranged in the pressure experiment chamber; and a temperature sensor is arranged in the incubator and/or the pressure experiment cabin.

6. The ultra-high pressure simulation experiment system of the fidelity coring device of claim 1 or 5, wherein: the outer barrel of the pressure experiment cabin comprises a first test piece, a second test piece and an intermediate connecting piece, wherein the intermediate connecting piece is of a cylindrical structure;

the first test piece and the second test piece are connected through an intermediate connecting piece, and a liquid injection hole is formed in the wall of the intermediate connecting piece.

7. The ultra-high pressure simulation experiment system of the fidelity coring device of claim 6, wherein: and a temperature sensor is arranged on the inner wall of the middle connecting piece.

8. The ultra-high pressure simulation experiment system of the fidelity coring device of claim 6, wherein: the pressure experiment chamber also comprises a central rod and a core barrel, a flap valve used for realizing the sealing closing of the lower end of the pressure maintaining experiment chamber is installed in the second experiment piece, the flap valve comprises a valve seat, a valve clack and an elastic piece, and one end of the valve clack is movably connected with the outer side wall of the upper end of the valve seat;

the lower end of the central rod extends into the core barrel, and a second reserved hole for lifting the central rod is formed in the position, opposite to the central rod, of the box body in the axial direction;

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.

9. The fidelity corer ultrahigh pressure simulation experiment system of claim 8, characterized in that: the linear driving mechanism is fixedly installed outside the incubator, and an output part of the linear driving mechanism is connected with the central rod to drive the central rod to axially and linearly move.

10. The fidelity corer ultrahigh pressure simulation experiment system of claim 9, characterized in that: and a tension testing device is arranged between the output part of the linear driving mechanism and the central rod.

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