阅读说明：本技术 基于油浴式的内外温控保真取芯器实验平台 (Oil bath type internal and external temperature control fidelity corer experiment platform ) 是由 陈领 谢和平 高明忠 李聪 吴年汉 李佳南 何志强 杨明庆 余波 胡云起 黄伟 于 2020-06-05 设计创作，主要内容包括：本发明涉及基于油浴式的内外温控保真取芯器实验平台,包括箱体、外部加热系统以及用于模拟保真取芯器保真舱的压力实验舱,压力实验舱的舱体的内壁设有电加热结构,压力实验舱的舱壁上设有侧孔；压力实验舱置于箱体中,箱体上设有进液口和出液口,外部加热系统包括供液系统和电加热器,供液系统的出口与电加热器的入口相连,电加热器的出口通过进液管路与进液口相连。本发明可模拟高温环境,可给压力实验舱提供高温环境,利于还原真实的原位环境,使实验更为完整、客观,数据更加可靠；本发明可内外同时加热,可提高加热效率,利于缩短实验时间,提高实验效率；内部的电加热结构设于加压加热中间件上,不用改变保压实验舱的结构,可降低实验成本。(The invention relates to an oil bath-based internal and external temperature control fidelity corer experiment platform, which comprises a box body, an external heating system and a pressure experiment chamber used for simulating a fidelity chamber of a fidelity corer, wherein the inner wall of the chamber body of the pressure experiment chamber is provided with an electric heating structure, and the chamber wall of the pressure experiment chamber is provided with a side hole; the pressure experiment chamber is arranged in the box body, a liquid inlet and a liquid outlet are arranged on the box body, the external heating system comprises a liquid supply system and an electric heater, an outlet of the liquid supply system is connected with an inlet of the electric heater, and an outlet of the electric heater is connected with the liquid inlet through a liquid inlet pipeline. The invention can simulate high-temperature environment, can provide high-temperature environment for the pressure experiment chamber, is beneficial to restoring real in-situ environment, and ensures that the experiment is more complete and objective and the data is more reliable; the invention can heat inside and outside simultaneously, can improve the heating efficiency, is beneficial to shortening the experimental time and improving the experimental efficiency; the internal electric heating structure is arranged on the pressurizing and heating middleware, the structure of the pressure maintaining experiment chamber is not required to be changed, and the experiment cost can be reduced.)

1. Interior outer control by temperature change fidelity corer experiment platform based on oil bath formula, including the pressure experiment cabin that is used for simulating fidelity corer fidelity cabin, its characterized in that: the pressure experiment chamber also comprises a box body and an external heating system, wherein the inner wall of the chamber body of the pressure experiment chamber is provided with an electric heating structure, and the chamber wall of the pressure experiment chamber is provided with a side hole;

the pressure experiment chamber is arranged in a box body, and a liquid inlet, a liquid outlet and a first preformed hole for an experiment pipeline to pass through are formed in the box body; the external heating system comprises a liquid supply system and an electric heater, wherein an outlet of the liquid supply system is connected with an inlet of the electric heater, and an outlet of the electric heater is connected with the liquid inlet through a liquid inlet pipeline.

2. The oil bath based internal and external temperature control fidelity corer experimental platform of claim 1, wherein: the cabin body of pressure experiment cabin includes first test piece, second test piece and pressurized heating middleware, and first test piece passes through the pressurized heating middleware with the second test piece and links to each other, the electrical heating structure all locates on the pressurized heating middleware with the side opening.

3. The oil bath based internal and external temperature control fidelity corer experimental platform of claim 2, wherein: a flap valve used for realizing the sealing closing of the lower end of the pressure maintaining experiment cabin is arranged in the second test 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.

4. The oil bath based internal and external temperature control fidelity corer experimental platform of claim 3, wherein: 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.

5. The oil bath based internal and external temperature control fidelity corer experimental platform of claim 1, 2, 3 or 4, characterized in that: the electrical heating structure comprises a graphene film.

6. The oil bath based internal and external temperature control fidelity corer experimental platform of claim 5, wherein: the electric heating structure further comprises an aluminum cylinder, the graphene film is plated on the inner cylinder wall of the aluminum cylinder, and the aluminum cylinder is embedded in the annular groove in the inner wall of the cabin body.

7. The oil bath based internal and external temperature control fidelity corer experimental platform of claim 1, 2, 3 or 4, characterized in that: the electrical heating structure includes a helical thermal coil.

8. The oil bath based internal and external temperature control fidelity corer experimental platform of claim 1, wherein: the liquid supply system comprises an oil tank and a pump, wherein an outlet of the oil tank is connected with an inlet of the pump, and an outlet of the pump is connected with an inlet of the electric heater.

9. The oil bath based internal and external temperature control fidelity corer experimental platform of claim 8, wherein: the liquid outlet is connected with one end of a liquid outlet pipeline, and the other end of the liquid outlet pipeline is connected with the oil tank.

10. The oil bath based internal and external temperature control fidelity corer experimental platform of claim 8 or 9, characterized in that: a return pipeline is arranged between the pump and the electric heater and is communicated with the oil tank.

Technical Field

The invention relates to the technical field of test systems of coring devices, in particular to an oil bath-based internal and external 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 an oil bath-based internal and external 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:

the oil bath-based internal and external temperature control fidelity corer experiment platform comprises a box body, an external heating system and a pressure experiment chamber for simulating a fidelity chamber of a fidelity corer, wherein the inner wall of the chamber body of the pressure experiment chamber is provided with an electric heating structure, and the chamber wall of the pressure experiment chamber is provided with a side hole;

the pressure experiment chamber is arranged in a box body, and a liquid inlet, a liquid outlet and a first preformed hole for an experiment pipeline to pass through are formed in the box body; the external heating system comprises a liquid supply system and an electric heater, wherein an outlet of the liquid supply system is connected with an inlet of the electric heater, and an outlet of the electric heater is connected with the liquid inlet through a liquid inlet pipeline.

Further, the cabin body of the pressure experiment cabin comprises a first test piece, a second test piece and a pressurizing and heating intermediate piece, the first test piece is connected with the second test piece through the pressurizing and heating intermediate piece, and the electric heating structure and the side holes are arranged on the pressurizing and heating intermediate piece.

Further, a flap valve for realizing the sealing closing of the lower end of the pressure maintaining experiment cabin is arranged in the second test 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 chamber 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 pulling 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, the electrical heating structure comprises a graphene film.

Further, the electric heating structure further comprises an aluminum cylinder, the graphene film is plated on the inner cylinder wall of the aluminum cylinder, and the aluminum cylinder is embedded in an annular groove in the inner wall of the cabin body.

Further, the electrical heating structure comprises a helical thermal coil.

Further, the liquid supply system comprises an oil tank and a pump, wherein an outlet of the oil tank is connected with an inlet of the pump, and an outlet of the pump is connected with an inlet of the electric heater.

Furthermore, the liquid outlet is connected with one end of a liquid outlet pipeline, and the other end of the liquid outlet pipeline is connected with the oil tank.

Wherein, a return line is arranged between the pump and the electric heater, and the return line leads to the oil tank.

Compared with the prior art, the invention has the following beneficial effects:

the invention can simulate high-temperature environment, can provide high-temperature environment for a pressure experiment chamber, is beneficial to restoring real in-situ environment, and ensures that the experiment is more complete and objective and the data is more reliable;

2, the invention can heat inside and outside simultaneously, can improve the heating efficiency, is favorable for shortening the experimental time and improving the experimental efficiency;

3, the internal electric heating structure is arranged on the pressurizing and heating middleware, so that the structure of the pressure maintaining experiment chamber is not required to be changed, and the experiment cost can be reduced;

4, the middle connecting piece is used for connecting the test piece, so that the drilling on the test piece can be avoided, the damage to the test piece can be prevented, the pressure environment of the test piece can be restored, the test result is more reliable, and the accuracy of the experiment can be improved.

Drawings

FIG. 1 is a schematic diagram of the present invention;

FIG. 2 is a schematic view of the interior of the case;

FIG. 3 is a schematic view of the configuration of the holding pressure experiment chamber when the center pole is not lifted;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 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. 6 is a partial enlarged view at B in FIG. 5;

FIG. 7 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. 8 is a schematic view showing the structure of a pressure heating intermediate member in the first embodiment;

FIG. 9 is a schematic view of the pressure experiment chamber with the center pole not lifted;

FIG. 10 is a schematic view of the pressure test chamber with the center pole raised to the end of travel;

fig. 11 is a schematic structural view of a pressure heating intermediate member in the second embodiment.

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.