CN112730097A

CN112730097A - Long-duration high-precision rheological test system for simulating deep-ground complex conditions

Info

Publication number: CN112730097A
Application number: CN202110090287.1A
Authority: CN
Inventors: 刘建锋; 谢和平; 石祥超; 李存宝; 郑俊; 李化; 裴建良; 邓建辉; 雷孝章
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-04-30

Abstract

The invention belongs to the technical field of rheological test systems, and particularly provides a series of long-duration high-precision rheological test systems for simulating deep complex conditions, which comprise a triaxial compression rheological test system, a uniaxial compression rheological test system and a uniaxial tension rheological test system. According to the high-precision rheological test system provided by the invention, the pressure stabilizing load formed by the self weight of the load is transmitted to the sample through the hydraulic equipment, the constant of the applied load is ensured without electric power in the pressure stabilizing process, the high-precision rheological test system is suitable for the requirement of long-time duration load stabilization, the continuity of applying small tonnage or small stress to large tonnage or large stress in the loading process can be ensured, the problem of keeping the loading stability under the long-term loading condition is solved, the measurement is more convenient and faster, and the measurement result is more reliable.

Description

Long-duration high-precision rheological test system for simulating deep-ground complex conditions

Technical Field

The invention relates to the technical field of rheological test systems, in particular to a long-duration high-precision rheological test system which comprises a triaxial compression rheological test system, a uniaxial compression rheological test system and a uniaxial tension rheological test system and is used for simulating deep complex conditions.

Background

Any material can continuously deform when developing along with time under the action of load; with increasing temperature, an increase in the rate of deformation of the material under constant load results, which leads to a deterioration in the mechanical properties of the material. Moreover, under the effect of water seepage, the material deformation and the mechanical property deterioration process can be further accelerated. The rheological property of the material directly determines the long-term mechanical property of the material, particularly for deeply buried underground rock mass engineering, the rock presents more obvious strong rheological aging characteristics under the highly humid and hot environment of three-high complex coupling of deep buried high temperature, high stress, high seepage pressure and the like, the long-term stability of the engineering surrounding rock is directly determined, the reliable rheological mechanical property of the rock needs to be obtained through tests, and the key point is how to ensure the constancy of the test conditions in the tests.

The rock is as natural geological material, and the country rock of deeply buried rock engineering is fresh rock mass usually, and its bearing capacity is great usually, and under the lateral stress effect, its bearing capacity promotes greatly, consequently not only need guarantee the lateral stress invariant in the test process, more need to guarantee the constancy of large-tonnage load along the test piece is vertical. Under the influence of time effect, in the testing process, the side stress or the slight fluctuation of the axial load can cause the rock to generate obvious mutational change in the long-term rheological deformation, and the influence can possibly cause the misjudgment of the long-term mechanical behavior of the tested rock. Therefore, how to ensure that the test conditions are constant and unchanged in the long-time test process after the experiment begins is the key for ensuring the effectiveness of the rock rheological test result.

At present, the axial load of the rheological test is applied by a large-tonnage load in a circuit control or manual hydraulic control mode, and the applied load is ensured to be constant by depending on power supply electric power respectively. However, in the power control mode, a power failure may cause load interruption; the rock is continuously deformed, and the hydraulic loading cannot supplement liquid medium to the loaded pressure cavity in time, so that the liquid pressure is reduced, the applied load is reduced, and the load or stress under the long-term loading condition cannot be ensured to be constant. In addition, the existing gravity loading mode mainly depends on a moment arm of a lever arm to output a large-tonnage load, which causes the load to be applied from a specific certain value, and cannot realize continuous application of a low-tonnage small load to a large-tonnage large load of the same test piece in the test process.

In conclusion, the existing experimental method cannot ensure the constancy and reliability of the lateral stress and the axial load in the rheological test process and the continuous application of the load.

Disclosure of Invention

The invention aims to provide a series of high-precision rheological test systems capable of stabilizing load for a long time, wherein a stabilized pressure load formed by the self weight of a load is transmitted to a test sample through hydraulic equipment, and no electric power is needed in the pressure stabilizing process to ensure the constancy of the applied load, so that the high-precision rheological test systems are suitable for the requirement of stabilizing load for a long time, can ensure the continuity of applying a small tonnage or a small stress to a large tonnage or a large stress in the loading process, solve the problem of keeping the loading stability under the long-term loading condition, and have the advantages of more convenient measurement and more reliable measurement result.

Based on the same technical concept that the load self-weight forms the stable pressure load and is transmitted to the test sample through the hydraulic equipment, the invention provides three technical schemes of three types of high-precision rheological test systems capable of realizing long-term stable load.

The first type: a three-axis compression rheology test system;

the second type: a uniaxial compression rheology test system;

in the third category: uniaxial extensional rheology test system.

The main differences between the triaxial compression rheological test system and the uniaxial compression rheological test system in the invention are as follows: the triaxial compression rheological test system can provide axial loading and lateral loading for a sample according to actual needs. The main difference between the uniaxial compression rheological test system and the uniaxial tension rheological test system is that: the sample mounting assembly of the uniaxial compression rheology test system mainly provides the sample with an axial load for further compressing the sample, and the sample mounting assembly of the uniaxial tension rheology test system mainly provides the sample with an axial load for further stretching the sample.

The invention is realized by the following technical scheme.

The method comprises the following steps of firstly, simulating a long-duration high-precision rheological test system under deep-ground complex conditions, wherein the rheological test system is a triaxial compression rheological test system; the triaxial compression rheological test system comprises a sample mounting assembly, a loading mechanism and a hydraulic station module which is connected with the sample mounting assembly and the loading mechanism respectively for supplying liquid, wherein the sample mounting assembly and the loading mechanism are connected with each other;

the sample mounting assembly comprises a mounting rack, and a load sensor, a sample clamping assembly and an axial loading oil cylinder which are sequentially mounted in the mounting rack from top to bottom; the sample clamping assembly is provided with a sample mounting cavity for clamping a sample, the top of the sample clamping assembly is mounted on the mounting rack through a load sensor, and the bottom of the sample clamping assembly is connected with an axial loading piston of an axial loading oil cylinder;

the loading mechanism comprises an axial loading assembly hydraulically connected with the axial loading oil cylinder, a lateral loading assembly hydraulically connected with the sample clamping assembly and a loading rack;

the axial loading assembly comprises an axial labor-saving wheel unit, an axial pressure-stabilizing first transmission wheel, an axial pressure-stabilizing second transmission wheel, an axial pressure-stabilizing transmission rope, an axial pressure-stabilizing hydraulic assembly, an axial pressure-stabilizing load platform and an axial pressure-stabilizing weight; the fixed end of the axial pressure-stabilizing hydraulic component is arranged on the loading rack, and the movable end of the axial pressure-stabilizing hydraulic component is connected with the force transmission end of the axial labor-saving wheel unit; one end of the axial pressure-stabilizing transmission rope is wound on the axial labor-saving wheel unit, and the other end of the axial pressure-stabilizing transmission rope is connected to an axial pressure-stabilizing load platform for supporting an axial pressure-stabilizing weight through an axial pressure-stabilizing first transmission wheel and an axial pressure-stabilizing second transmission wheel in sequence;

the lateral loading assembly comprises a lateral labor-saving wheel unit, a lateral pressure-stabilizing first transmission wheel, a lateral pressure-stabilizing second transmission wheel, a lateral pressure-stabilizing transmission rope, a lateral pressure-stabilizing hydraulic assembly, a lateral pressure-stabilizing load platform and a lateral pressure-stabilizing weight; the fixed end of the lateral pressure-stabilizing hydraulic component is arranged on the loading rack, and the movable end of the lateral pressure-stabilizing hydraulic component is connected with the force transmission end of the lateral labor-saving wheel unit; one end of the lateral pressure stabilizing transmission rope is wound on the lateral labor-saving wheel unit, and the other end of the lateral pressure stabilizing transmission rope is connected to a lateral pressure stabilizing load platform for supporting lateral pressure stabilizing weights through a lateral pressure stabilizing first transmission wheel and a lateral pressure stabilizing second transmission wheel in sequence;

the hydraulic station module comprises a main hydraulic cylinder, and the main hydraulic cylinder is hydraulically connected with the axial loading oil cylinder, the axial pressure stabilizing oil cylinder and the lateral pressure stabilizing oil cylinder through a group of oil ways; the axial pressure stabilizing oil cylinder which can be communicated with the inner cavity of the axial loading oil cylinder is also hydraulically connected with the axial loading oil cylinder through an oil way, a pressure stabilizing oil outlet of the axial loading oil cylinder is positioned in a pressure stabilizing loading oil outlet cavity of the axial loading oil cylinder, and a pressure stabilizing oil inlet of the axial loading oil cylinder is positioned in a pressure stabilizing loading oil inlet cavity of the axial loading oil cylinder; the lateral pressure stabilizing oil cylinder which can be communicated with the sample mounting cavity of the sample clamping assembly is also hydraulically connected with the sample clamping assembly through an oil way.

Simulating a long-duration high-precision rheological test system under a deep complex condition, wherein the rheological test system is a single-shaft compression rheological test system; the single-shaft compression rheological test system comprises a sample mounting assembly, a loading mechanism and a hydraulic station module which is connected with the sample mounting assembly and the loading mechanism respectively for supplying liquid;

the loading mechanism comprises an axial loading assembly hydraulically connected with an axial loading oil cylinder;

the hydraulic station module comprises a main hydraulic cylinder, and the main hydraulic cylinder is hydraulically connected with the axial loading oil cylinder and the axial pressure stabilizing oil cylinder through a group of oil ways; the axial pressure stabilizing oil cylinder which can be communicated with the inner cavity of the axial loading oil cylinder is also hydraulically connected with the axial loading oil cylinder through an oil way, a pressure stabilizing oil outlet of the axial loading oil cylinder is positioned in a pressure stabilizing loading oil outlet cavity of the axial loading oil cylinder, and a pressure stabilizing oil inlet of the axial loading oil cylinder is positioned in a pressure stabilizing loading oil inlet cavity of the axial loading oil cylinder.

Simulating a long-duration high-precision rheological test system under deep complex conditions, wherein the rheological test system is a uniaxial tensile rheological test system; the uniaxial tension rheological test system comprises a sample mounting assembly, a loading mechanism and a hydraulic station module which is connected with the sample mounting assembly and the loading mechanism respectively for supplying liquid;

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

(1) according to the series of high-precision rheological test systems capable of realizing long-time load stabilization, the stabilized pressure load formed by the self weight of the load is transmitted to the sample through the hydraulic equipment, the constancy of the applied load is not required to be ensured by electric power in the process of stabilizing the pressure, the high-precision rheological test systems are suitable for the long-time load stabilization requirement, the continuity of applying a small tonnage or a small stress to a large tonnage or a large stress in the loading process can be ensured, the problem of keeping the loading stability under the long-term loading condition is solved, the measurement is more convenient, and the measurement result is more reliable.

(2) The invention provides three major products of a triaxial compression rheological test system, a uniaxial compression rheological test system and a uniaxial tension rheological test system under the unified technical concept, and can meet different test requirements.

(3) The triaxial compression rheological test system provided with the loading mechanism, the heating device and the seepage device can simulate the high-damp-heat environment of surrounding rock in complex coupling of deep-buried high temperature, high stress and high seepage pressure, and ensures that the result of the rock rheological test is closer to the actual data of a rock body.

Drawings

Fig. 1 is a schematic front view of a first exemplary configuration of a triaxial compression rheology test system.

Fig. 2 is a schematic top view of fig. 1.

FIG. 3 is a schematic front view of a second exemplary configuration of a triaxial compression rheology test system.

FIG. 4 is a schematic front view of a third exemplary configuration of a triaxial compression rheology test system.

FIG. 5 is a schematic front view of a first exemplary configuration of a uniaxial compression rheology test system.

FIG. 6 is a schematic front view of a second exemplary configuration of a uniaxial compressive rheology test system.

FIG. 7 is a schematic front view of a third exemplary configuration of a uniaxial compression rheology test system.

FIG. 8 is a schematic front view of a first exemplary configuration of a uniaxial extensional rheology test system.

FIG. 9 is a schematic front view of a second exemplary configuration of a uniaxial extensional rheology test system.

FIG. 10 is a schematic front view of a third exemplary configuration of a uniaxial extensional rheology test system.

FIG. 11 is a front view of a first exemplary configuration of an axial loading assembly or a side loading assembly.

FIG. 12 is a front view of a second exemplary configuration of an axial loading assembly or a lateral loading assembly.

FIG. 13 is a front view of a third exemplary configuration of an axial loading assembly or a lateral loading assembly.

Fig. 14 is a schematic view showing a typical structure of the power-saving wheel unit.

FIG. 15 is a first schematic view of the labor-saving principle of the in-line type of the power saving wheel unit.

Fig. 16 is a schematic view of the labor-saving principle of the inline type labor-saving wheel unit.

Fig. 17 is a labor-saving principle schematic diagram of a coaxial type labor-saving wheel unit.

Fig. 18 is a schematic structural diagram of the adjustable distance between two driving wheels.

FIG. 19 is a schematic view showing a connection structure of the sample holding member, the heating device and the effusion device.

Wherein:

1. installing a frame; 2. a load sensor; 3-1, an upper force transmission column; 3-2, a lower force transmission column; 4. a rock sample; 5-1, a pressure cavity shell; 5-2, a pressure cavity base; 6. axially loading the piston; 7. an axial loading oil cylinder; 8-1, an upper clamping seat; 8-2, a lower clamping seat; 9. axially loading the oil cylinder base; 10. loading the rack;

11-1, a master hydraulic cylinder; 11-2, valve A; 11-3, A oil way; 11-4, valve B; 11-5, B oil circuit; 11-6, valve C; 11-7, C oil circuit; 11-8, D valve; 11-9 and D oil way; 11-10, E valve; 11-11, E oil circuit; 11-12, F valve; 11-13, F oil circuit; 11-14, G valve; 11-15, G oil circuit; 11-16, H valve; 11-17, H oil circuit;

12. an axial pressure-stabilizing piston; 13. an axial pressure stabilizing oil cylinder; 14. an axial pressure stabilizing oil cylinder base; 15. a first bolt group; 16. an axial pressure stabilizing guide post; 17. an axial voltage-stabilizing connecting plate; 19. an axial pressure stabilizing component wheel set; 20. an axial pressure stabilizing positioning wheel set; 21. a first drive wheel for axially stabilizing pressure; 22. a second driving wheel for axially stabilizing the pressure; 23. an axial pressure-stabilizing transmission rope; 24. an axial voltage stabilization load platform; 30. axial pressure-stabilizing weights; 31. an axial pressure-stabilizing bearing plate; 32. an axial pressure stabilizing fixing column;

12-1, a lateral pressure-stabilizing piston; 13-1, a lateral pressure stabilizing oil cylinder; 14-1, a lateral pressure stabilizing oil cylinder base; 15-1, a second bolt group; 16-1, a lateral pressure stabilizing guide column; 17-1, a lateral voltage-stabilizing connecting plate; 19-1, a lateral pressure stabilizing component wheel set; 20-1, a lateral pressure stabilizing positioning wheel set; 21-1, laterally stabilizing a first transmission wheel; 22-1, a lateral pressure stabilizing second transmission wheel; 23-1, a lateral pressure-stabilizing transmission rope; 24-1, a lateral voltage-stabilizing load platform; 30-1, lateral pressure-stabilizing weights; 31-1, a lateral pressure stabilizing bearing plate; 32-1, a lateral voltage stabilizing fixing column;

19-11, a first lateral pressure stabilizing movable pulley; 19-12 a second lateral pressure-stabilizing movable pulley; 20-11, a first lateral pressure stabilizing fixed pulley; 20-12 laterally stabilizing a second fixed pulley;

25. a heating device; 26-1, a seepage water inlet pipe; 26-2, and a seepage water outlet pipe.

Detailed Description

Example 1:

the embodiment provides a long-duration high-precision rheological test system for simulating deep complex conditions, and particularly the rheological test system is a triaxial compression rheological test system.

As shown in fig. 1-4, the triaxial compression rheological test system includes a sample mounting assembly, a loading mechanism and a hydraulic station module connected to the sample mounting assembly and the loading mechanism respectively for supplying liquid;

the sample mounting assembly comprises a mounting rack 1, and a load sensor 2, a sample clamping assembly and an axial loading oil cylinder 7 which are sequentially mounted in the mounting rack 1 from top to bottom; the test sample clamping assembly is provided with a test sample mounting cavity for clamping a rock test sample 4, the top of the test sample clamping assembly is mounted on the mounting rack 1 through the load sensor 2, and the bottom of the test sample clamping assembly is connected with the axial loading piston 6 of the axial loading oil cylinder 7;

the loading mechanism comprises an axial loading assembly hydraulically connected with an axial loading oil cylinder 7, a lateral loading assembly hydraulically connected with the sample clamping assembly and a loading rack 10;

the axial loading assembly comprises an axial labor-saving wheel unit, an axial pressure-stabilizing first driving wheel 21, an axial pressure-stabilizing second driving wheel 22, an axial pressure-stabilizing driving rope 23, an axial pressure-stabilizing hydraulic assembly, an axial pressure-stabilizing load platform 24 and an axial pressure-stabilizing weight 30; the fixed end of the axial pressure-stabilizing hydraulic component is arranged on the loading frame 10, and the movable end of the axial pressure-stabilizing hydraulic component is connected with the force transmission end of the axial labor-saving wheel unit; one end of the axial pressure-stabilizing transmission rope 23 is wound on the axial labor-saving wheel unit, and the other end of the axial pressure-stabilizing transmission rope is connected to an axial pressure-stabilizing load platform 24 for supporting the axial pressure-stabilizing weight 30 through the axial pressure-stabilizing first transmission wheel 21 and the axial pressure-stabilizing second transmission wheel 22 in sequence;

the lateral loading assembly comprises a lateral labor-saving wheel unit, a lateral pressure-stabilizing first driving wheel 21-1, a lateral pressure-stabilizing second driving wheel 22-1, a lateral pressure-stabilizing driving rope 23-1, a lateral pressure-stabilizing hydraulic assembly, a lateral pressure-stabilizing load platform 24-1 and a lateral pressure-stabilizing weight 30-1; the fixed end of the lateral pressure-stabilizing hydraulic component is arranged on the loading frame 10, and the movable end of the lateral pressure-stabilizing hydraulic component is connected with the force transmission end of the lateral labor-saving wheel unit; one end of the lateral pressure-stabilizing transmission rope 23-1 is wound on the lateral labor-saving wheel unit, and the other end of the lateral pressure-stabilizing transmission rope is connected to a lateral pressure-stabilizing load platform 24-1 for bearing a lateral pressure-stabilizing weight 30-1 through a lateral pressure-stabilizing first transmission wheel 21-1 and a lateral pressure-stabilizing second transmission wheel 22-1 in sequence;

the hydraulic station module comprises a main hydraulic cylinder 11-1, and the main hydraulic cylinder 11-1 is hydraulically connected with the axial loading oil cylinder 7, the axial pressure stabilizing oil cylinder 13 and the lateral pressure stabilizing oil cylinder 13-1 through a group of oil ways; the axial pressure stabilizing oil cylinder 13 which can be communicated with the inner cavity of the axial loading oil cylinder 7 is also hydraulically connected with the axial loading oil cylinder 7 through an oil way, a pressure stabilizing oil outlet of the axial loading oil cylinder 7 is positioned in a pressure stabilizing loading oil outlet cavity of the axial loading oil cylinder 7, and a pressure stabilizing oil inlet of the axial loading oil cylinder 7 is positioned in a pressure stabilizing loading oil inlet cavity of the axial loading oil cylinder 7; and the lateral pressure stabilizing oil cylinder 13-1 which can be communicated with the sample mounting cavity of the sample clamping assembly is also hydraulically connected with the sample clamping assembly through an oil way.

Furthermore, the sample clamping assembly comprises an upper force transmission column 3-1, a lower force transmission column 3-2, a pressure cavity shell 5-1 and a pressure cavity base 5-2 which form a sample mounting cavity together; the top end of the upper force transmission column 3-1 is arranged on the mounting rack 1 through a load sensor 2, and the bottom end of the upper force transmission column 3-1 extends into the pressure cavity shell 5-1 and is in sliding connection with the pressure cavity shell 5-1; the lower force transmission column 3-2 is arranged on the top surface of the pressure cavity base 5-2, and the bottom surface of the pressure cavity base 5-2 is connected with an axial loading piston 6 of an axial loading oil cylinder 7; the pressure cavity shell 5-1 and the pressure cavity base 5-2 are detachably connected.

Further, for the triaxial compression rheological test system, the structures of the axial loading assembly and the lateral loading assembly can be the same hydraulic loading assembly or different hydraulic loading assemblies. The embodiment provides a specific scheme of three groups of axial pressure stabilizing hydraulic assemblies and lateral pressure stabilizing hydraulic assemblies which adopt hydraulic loading assemblies with the same structure.

A first group: when the first group of hydraulic loading assemblies are adopted, the specific schemes of the axial pressure stabilizing hydraulic assembly and the lateral pressure stabilizing hydraulic assembly are as follows:

as shown in fig. 1 and fig. 2, the axial pressure stabilizing hydraulic assembly includes an axial pressure stabilizing cylinder 13, and an axial pressure stabilizing cylinder base 14 of the axial pressure stabilizing cylinder 13 is directly mounted on the loading frame 10 through a first bolt group 15; an axial pressure stabilizing piston 12 of the axial pressure stabilizing oil cylinder 13 extends upwards and is connected with a force transmission end of the axial labor-saving wheel unit;

the lateral pressure stabilizing hydraulic component comprises a lateral pressure stabilizing oil cylinder 13-1, and a lateral pressure stabilizing oil cylinder base 14-1 of the lateral pressure stabilizing oil cylinder 13-1 is directly installed on the loading rack 10 through a second bolt group 15-1; a lateral pressure stabilizing piston 12-1 of the lateral pressure stabilizing oil cylinder 13-1 extends upwards and is connected with a force transmission end of the lateral labor-saving wheel unit;

and an axial loading oil cylinder base 9 of the axial loading oil cylinder 7 is arranged on the mounting rack 1 through a third bolt group.

In the first group of hydraulic loading assemblies, the axial pressure stabilizing piston 12 of the axial pressure stabilizing oil cylinder 13 faces upwards, and the axial pressure stabilizing piston 12 is positioned at the upper part of the inner cavity of the axial pressure stabilizing oil cylinder 13. At this time, the upper part of the inner cavity of the axial pressure stabilizing oil cylinder 13 is a pressure stabilizing loading oil outlet cavity. When the axial pressure-stabilizing weight 30 or other loads are placed on the axial pressure-stabilizing load platform 24, under the action of the dead weight of the axial pressure-stabilizing weight 30, the axial pressure-stabilizing transmission rope 23 amplifies the acting force of the axial pressure-stabilizing transmission rope through the axial labor-saving wheel unit and then acts on the axial pressure-stabilizing piston 12 of the axial pressure-stabilizing oil cylinder 13, the axial pressure-stabilizing piston 12 moves upwards to compress the space of the pressure-stabilizing loading oil outlet cavity at the upper part, and therefore oil in the pressure-stabilizing loading oil outlet cavity is pressed into the pressure-stabilizing loading oil inlet cavity of the axial loading oil cylinder 7 through an oil way. On the other hand, since the axial loading piston 6 of the axial loading cylinder 7 is disposed upward, that is, the axial loading piston 6 is located at the upper portion of the inner cavity of the axial loading cylinder 7, and the axial loading piston 6 of the axial loading cylinder 7 moves and applies an axial load for compressing the sample through the sample clamping assembly, the pressure-stabilizing oil inlet cavity of the axial loading cylinder 7 is located at the lower portion of the inner cavity of the axial loading cylinder 7.

Therefore, the positions of the pressure stabilizing loading oil outlet chamber of the axial pressure stabilizing cylinder 13 and the pressure stabilizing loading oil inlet chamber of the axial loading cylinder 7 in the cylinder chamber are not fixed. When a compression rheological test is required to be performed on a sample, as long as load gravity acts on the axial pressure stabilizing piston 12 of the axial pressure stabilizing oil cylinder 13, a space compressed chamber is a pressure stabilizing loading oil outlet chamber of the axial pressure stabilizing oil cylinder 13 in the structure, and after oil flows in, the axial loading piston 6 of the axial loading oil cylinder 7 is pushed to apply a compression load to the sample, and a corresponding chamber is a pressure stabilizing loading oil inlet chamber of the axial loading oil cylinder 7 in the structure.

In the first group of hydraulic loading assemblies, a lateral pressure stabilizing piston 12-1 of a lateral pressure stabilizing oil cylinder 13-1 faces upwards, and the lateral pressure stabilizing piston 12-1 is positioned at the upper part of an inner cavity of the lateral pressure stabilizing oil cylinder 13-1. At the moment, the upper space of the inner cavity of the lateral pressure stabilizing oil cylinder 13-1 is a pressure stabilizing and loading oil outlet cavity. When a lateral pressure stabilizing weight 30-1 or other loads are placed on the lateral pressure stabilizing load platform 24-1, under the action of the dead weight of the lateral pressure stabilizing weight 30-1, the lateral pressure stabilizing transmission rope 23-1 amplifies the acting force of the lateral pressure stabilizing transmission rope through the lateral labor-saving wheel unit and then acts on a lateral pressure stabilizing piston 12-1 of a lateral pressure stabilizing oil cylinder 13-1, the lateral pressure stabilizing piston 12-1 moves upwards to compress the space of the upper pressure stabilizing loading oil outlet cavity, so that oil in the pressure stabilizing loading oil outlet cavity is pressed into a sample mounting cavity through an oil way, and lateral loads are provided for a sample.

Second group: when the second group of hydraulic loading assemblies are adopted, the specific schemes of the axial pressure stabilizing hydraulic assembly and the lateral pressure stabilizing hydraulic assembly are as follows:

as shown in fig. 3, the axial pressure stabilizing hydraulic assembly includes an axial pressure stabilizing oil cylinder 13, an axial pressure stabilizing guide post 16, an axial pressure stabilizing connecting plate 17, an axial pressure stabilizing bearing plate 31, and an axial pressure stabilizing fixing post 32; the axial pressure stabilizing and bearing plate 31 is mounted on the loading rack 10 through an axial pressure stabilizing fixing column 32; an axial pressure stabilizing oil cylinder base 14 of the axial pressure stabilizing oil cylinder 13 is arranged at the bottom end of an axial pressure stabilizing guide column 16, and the top end of the axial pressure stabilizing guide column 16 penetrates through an axial pressure stabilizing bearing plate 31 to be connected with an axial pressure stabilizing connecting plate 17; the axial pressure stabilizing piston 12 of the axial pressure stabilizing oil cylinder 13 extends upwards and is connected to an upper axial pressure stabilizing bearing plate 31; the axial pressure-stabilizing connecting plate 17 is connected with the force transmission end of the upper axial labor-saving wheel unit;

the lateral pressure stabilizing hydraulic component comprises a lateral pressure stabilizing oil cylinder 13-1, a lateral pressure stabilizing guide column 16-1, a lateral pressure stabilizing connecting plate 17-1, a lateral pressure stabilizing bearing plate 31-1 and a lateral pressure stabilizing fixing column 32-1; the lateral pressure stabilizing and bearing plate 31-1 is installed on the loading rack 10 through a lateral pressure stabilizing fixing column 32-1; a lateral pressure stabilizing oil cylinder base 14-1 of the lateral pressure stabilizing oil cylinder 13-1 is installed at the bottom end of a lateral pressure stabilizing guide column 16-1, and the top end of the lateral pressure stabilizing guide column 16-1 penetrates through a lateral pressure stabilizing bearing plate 31-1 to be connected with a lateral pressure stabilizing connecting plate 17-1; a lateral pressure stabilizing piston 12-1 of the lateral pressure stabilizing oil cylinder 13-1 extends upwards and is connected to an upper lateral pressure stabilizing bearing plate 31-1; the lateral pressure-stabilizing connecting plate 17-1 is connected with the force transmission end of the lateral labor-saving wheel unit above.

In the second group of hydraulic loading assemblies, the axial pressure stabilizing piston 12 of the axial pressure stabilizing oil cylinder 13 faces upwards, and the axial pressure stabilizing piston 12 is positioned at the upper part of the inner cavity of the axial pressure stabilizing oil cylinder 13. Unlike the first group of hydraulic loading assembly structures, the axial pressure-stabilizing piston 12 is not directly connected with the axial labor-saving wheel unit, but is connected with the upper axial pressure-stabilizing bearing plate 31, and the axial pressure-stabilizing bearing plate 31 is fixed on the loading frame 10 through the axial pressure-stabilizing fixing column 32. When the axial pressure-stabilizing weight 30 or other loads are placed on the axial pressure-stabilizing load platform 24, under the action of the dead weight of the axial pressure-stabilizing weight 30, the axial pressure-stabilizing transmission rope 23 amplifies the acting force of the axial pressure-stabilizing transmission rope through the axial labor-saving wheel unit and then acts on the axial pressure-stabilizing connecting plate 17, and the axial pressure-stabilizing connecting plate 17 is transmitted to the axial pressure-stabilizing oil cylinder base 14 through the axial pressure-stabilizing guide column 16, so that the acting force is reversely acted on the axial pressure-stabilizing piston 12, and the lower space of the axial pressure-stabilizing oil cylinder 13 is compressed. At this time, the lower space of the inner cavity of the axial pressure stabilizing oil cylinder 13 is a pressure stabilizing and loading oil outlet cavity. Oil in the pressure-stabilizing loading oil outlet cavity of the axial pressure-stabilizing oil cylinder 13 is pressed into the pressure-stabilizing loading oil inlet cavity of the axial loading oil cylinder 7 through an oil way. On the other hand, since the axial loading piston 6 of the axial loading cylinder 7 is disposed upward, that is, the axial loading piston 6 is located at the upper portion of the inner cavity of the axial loading cylinder 7, and the axial loading piston 6 of the axial loading cylinder 7 moves and applies an axial load for compressing the sample through the sample clamping assembly, the pressure-stabilizing oil inlet cavity of the axial loading cylinder 7 is located at the lower portion of the inner cavity of the axial loading cylinder 7.

In the same way, the positions of the pressure stabilizing loading oil outlet cavity of the axial pressure stabilizing cylinder 13 and the pressure stabilizing loading oil inlet cavity of the axial loading cylinder 7 in the cylinder cavity are not fixed. When a compression rheological test is required to be performed on a sample, as long as load gravity acts on the axial pressure stabilizing piston 12 of the axial pressure stabilizing oil cylinder 13, a space compressed chamber is a pressure stabilizing loading oil outlet chamber of the axial pressure stabilizing oil cylinder 13 in the structure, and after oil flows in, the axial loading piston 6 of the axial loading oil cylinder 7 is pushed to apply a compression load to the sample, and a corresponding chamber is a pressure stabilizing loading oil inlet chamber of the axial loading oil cylinder 7 in the structure.

In the second group of hydraulic loading assemblies, a lateral pressure stabilizing piston 12-1 of a lateral pressure stabilizing oil cylinder 13-1 faces upwards, and the lateral pressure stabilizing piston 12-1 is positioned at the upper part of an inner cavity of the lateral pressure stabilizing oil cylinder 13-1. Unlike the first set of hydraulic loading assembly structure, the lateral pressure-stabilizing piston 12-1 is not directly connected with the lateral labor-saving wheel unit, but is connected with the lateral pressure-stabilizing bearing plate 31-1 above and the lateral pressure-stabilizing bearing plate 31-1 is fixed on the loading frame 10 through the lateral pressure-stabilizing fixing column 32-1. When a lateral pressure stabilizing weight 30-1 or other loads are placed on the lateral pressure stabilizing load platform 24-1, under the action of the self weight of the lateral pressure stabilizing weight 30-1, the acting force of the lateral pressure stabilizing transmission rope 23-1 is amplified through the lateral force-saving wheel unit and then acts on the lateral pressure stabilizing connecting plate 17-1, and the lateral pressure stabilizing connecting plate 17-1 is transmitted to the lateral pressure stabilizing oil cylinder base 14-1 through the lateral pressure stabilizing guide column 16-1, so that the lateral pressure stabilizing piston 12-1 acts in the reverse direction, and the lower space of the lateral pressure stabilizing oil cylinder 13-1 is compressed. At the moment, the lower space of the inner cavity of the lateral pressure stabilizing oil cylinder 13-1 is a pressure stabilizing and loading oil outlet cavity. Oil in the pressure stabilizing loading oil outlet cavity of the lateral pressure stabilizing oil cylinder 13-1 is pressed into the sample mounting cavity through an oil way, so that lateral load is provided for the sample.

Third group: when a third group of hydraulic loading assemblies are adopted, the specific schemes of the axial pressure stabilizing hydraulic assembly and the lateral pressure stabilizing hydraulic assembly are as follows:

as shown in fig. 4, the axial pressure stabilizing hydraulic component includes an axial pressure stabilizing oil cylinder 13, an axial pressure stabilizing guide post 16, an axial pressure stabilizing connecting plate 17, an axial pressure stabilizing bearing plate 31, and an axial pressure stabilizing fixing post 32; the axial pressure stabilizing oil cylinder base 14 of the axial pressure stabilizing oil cylinder 13 is arranged on the loading rack 10 through an axial pressure stabilizing fixing column 32; the axial pressure stabilizing piston 12 of the axial pressure stabilizing oil cylinder 13 extends downwards and is connected to the axial pressure stabilizing bearing plate 31 below; the axial pressure stabilizing bearing plate 31 is installed at the bottom end of the axial pressure stabilizing guide column 16, and the top end of the axial pressure stabilizing guide column 16 penetrates through the axial pressure stabilizing oil cylinder base 14 to be connected with the axial pressure stabilizing connecting plate 17; the axial pressure-stabilizing connecting plate 17 is connected with the force transmission end of the upper axial labor-saving wheel unit;

the lateral pressure stabilizing hydraulic component comprises a lateral pressure stabilizing oil cylinder 13-1, a lateral pressure stabilizing guide column 16-1, a lateral pressure stabilizing connecting plate 17-1, a lateral pressure stabilizing bearing plate 31-1 and a lateral pressure stabilizing fixing column 32-1; a lateral pressure stabilizing oil cylinder base 14-1 of the lateral pressure stabilizing oil cylinder 13-1 is arranged on the loading rack 10 through a lateral pressure stabilizing fixing column 32-1; a lateral pressure stabilizing piston 12-1 of the lateral pressure stabilizing oil cylinder 13-1 extends downwards and is connected to a lateral pressure stabilizing bearing plate 31-1 below; the lateral pressure stabilizing bearing plate 31-1 is installed at the bottom end of the lateral pressure stabilizing guide column 16-1, and the top end of the lateral pressure stabilizing guide column 16-1 penetrates through the lateral pressure stabilizing oil cylinder base 14-1 to be connected with the lateral pressure stabilizing connecting plate 17-1; the lateral pressure-stabilizing connecting plate 17-1 is connected with the force transmission end of the lateral labor-saving wheel unit above.

The third group of hydraulic loading assemblies is opposite to the structure of the second group of hydraulic loading assemblies in the installation direction of the axial pressure stabilizing oil cylinder 13. At this time, the axial pressure stabilizing oil cylinder base 14 is installed on the loading rack 10 through the axial pressure stabilizing fixing column 32; the axial pressure-stabilizing piston 12 is connected with an axial pressure-stabilizing bearing plate 31 below, and the axial pressure-stabilizing bearing plate 31 is connected with an axial pressure-stabilizing connecting plate 17 above the axial pressure-stabilizing oil cylinder base 14 through an axial pressure-stabilizing guide column 16. When the axial pressure-stabilizing weight 30 or other loads are placed on the axial pressure-stabilizing load platform 24, under the action of the dead weight of the axial pressure-stabilizing weight 30, the acting force of the axial pressure-stabilizing transmission rope 23 is amplified by the axial labor-saving wheel unit and then acts on the axial pressure-stabilizing connecting plate 17, the axial pressure-stabilizing connecting plate 17 is transmitted to the axial pressure-stabilizing bearing plate 31 through the axial pressure-stabilizing guide column 16, and then the axial pressure-stabilizing piston 12 is pushed, so that the lower space of the axial pressure-stabilizing oil cylinder 13 is compressed by the upper space of the compression inner cavity. At this time, the upper space of the inner cavity of the axial pressure stabilizing oil cylinder 13 is a pressure stabilizing and loading oil outlet cavity. Oil in the pressure-stabilizing loading oil outlet cavity of the axial pressure-stabilizing oil cylinder 13 is pressed into the pressure-stabilizing loading oil inlet cavity of the axial loading oil cylinder 7 through an oil way. On the other hand, since the axial loading piston 6 of the axial loading cylinder 7 is disposed upward, that is, the axial loading piston 6 is located at the upper portion of the inner cavity of the axial loading cylinder 7, and the axial loading piston 6 of the axial loading cylinder 7 moves and applies an axial load for compressing the sample through the sample clamping assembly, the pressure-stabilizing oil inlet cavity of the axial loading cylinder 7 is located at the lower portion of the inner cavity of the axial loading cylinder 7.

The third group of hydraulic loading assemblies are opposite to the structure of the second group of hydraulic loading assemblies in the installation direction of the lateral pressure stabilizing oil cylinder 13-1. At the moment, the lateral pressure stabilizing oil cylinder base 14-1 is installed on the loading rack 10 through a lateral pressure stabilizing fixing column 32-1; the lateral pressure stabilizing piston 12-1 is connected with a lateral pressure stabilizing bearing plate 31-1 below, and the lateral pressure stabilizing bearing plate 31-1 is connected with a lateral pressure stabilizing connecting plate 17-1 above the lateral pressure stabilizing oil cylinder base 14-1 through a lateral pressure stabilizing guide column 16-1. When a lateral pressure stabilizing weight 30-1 or other loads are placed on the lateral pressure stabilizing load platform 24-1, under the action of the self weight of the lateral pressure stabilizing weight 30-1, the acting force of the lateral pressure stabilizing transmission rope 23-1 is amplified through the lateral force-saving wheel unit and then acts on the lateral pressure stabilizing connecting plate 17-1, the lateral pressure stabilizing connecting plate 17-1 is transmitted to the lateral pressure stabilizing bearing plate 31-1 through the lateral pressure stabilizing guide column 16-1, and then the lateral pressure stabilizing piston 12-1 is pushed, so that the lower space of the lateral pressure stabilizing oil cylinder 13-1 is compressed by the upper space of the compression inner cavity. At the moment, the upper space of the inner cavity of the lateral pressure stabilizing oil cylinder 13-1 is a pressure stabilizing and loading oil outlet cavity. Oil in the pressure stabilizing loading oil outlet cavity of the lateral pressure stabilizing oil cylinder 13-1 is pressed into the pressure stabilizing loading oil inlet cavity of the lateral loading oil cylinder through an oil way. Oil in the pressure stabilizing loading oil outlet cavity of the lateral pressure stabilizing oil cylinder 13-1 is pressed into the sample mounting cavity through an oil way, so that lateral load is provided for the sample.

It should be noted that, in actual conditions, the axial pressure stabilizing hydraulic component and the lateral pressure stabilizing hydraulic component can be combined by adopting any one of the three hydraulic loading component structures, and no matter which structure in the three hydraulic loading component structures is adopted, the technical concept of the structure is that the load is provided by the self gravity of the axial pressure stabilizing weight 30, and the provided load is transmitted to the sample by the hydraulic transmission mode.

The present embodiment also explains the structure of the laborsaving wheel unit in detail. Two typical labor-saving wheel assembly configurations are provided in this embodiment.

The first labor-saving wheel assembly is structurally characterized in that a fixed pulley-movable pulley block which is vertically arranged is used for force transmission, so that a load formed by load gravity is amplified by the labor-saving wheel assembly and then transmitted to a pressure stabilizing oil cylinder, and is transmitted to a sample by hydraulic pressure to form axial and/or lateral pressure stabilization.

Specifically, the method comprises the following steps: the axial labor-saving wheel unit comprises an upper axial pressure-stabilizing positioning wheel set 20, a lower axial pressure-stabilizing component wheel set 19 and a first hook arranged at the top of the axial pressure-stabilizing component wheel set 19; one end of an axial pressure stabilizing transmission rope 23 is connected to the first hook, and the other end of the axial pressure stabilizing transmission rope bypasses the axial pressure stabilizing positioning wheel set 20 and the axial pressure stabilizing component wheel set 19 and then is connected to an axial pressure stabilizing load platform 24 for supporting an axial pressure stabilizing weight 30 through an axial pressure stabilizing first transmission wheel 21 and an axial pressure stabilizing second transmission wheel 22 in sequence;

the lateral labor-saving wheel unit comprises an upper lateral pressure-stabilizing positioning wheel set 20-1, a lower lateral pressure-stabilizing component wheel set 19-1 and a second hook arranged at the top of the lateral pressure-stabilizing component wheel set 19-1; one end of a lateral pressure stabilizing transmission rope 23-1 is connected to the second hook, and the other end of the lateral pressure stabilizing transmission rope bypasses the lateral pressure stabilizing positioning wheel set 20-1 and the lateral pressure stabilizing component wheel set 19-1 and then is connected to a lateral pressure stabilizing load platform 24-1 for bearing a lateral pressure stabilizing weight 30-1 through a lateral pressure stabilizing first transmission wheel 21-1 and a lateral pressure stabilizing second transmission wheel 22-1 in sequence.

Further, the axial pressure-stabilizing positioning wheel set 20 mainly comprises an upper axial pressure-stabilizing fixed pulley I, a lower axial pressure-stabilizing fixed pulley II and a first labor-saving wheel connecting plate for integrally connecting the axial pressure-stabilizing fixed pulley I and the axial pressure-stabilizing fixed pulley II; the axial pressure stabilizing component wheel set 19 mainly comprises an upper axial pressure stabilizing movable pulley I, a lower axial pressure stabilizing movable pulley II and a second labor-saving wheel connecting plate which connects the axial pressure stabilizing movable pulley I and the axial pressure stabilizing movable pulley II into a whole; the first hook is arranged at one end of the second labor-saving wheel connecting plate close to the axial pressure-stabilizing positioning wheel set 20;

the lateral pressure stabilizing and positioning wheel set 20-1 mainly comprises a first lateral pressure stabilizing fixed pulley 20-11 at the upper part, a second lateral pressure stabilizing fixed pulley 20-12 at the lower part and a third labor-saving wheel connecting plate for connecting the first lateral pressure stabilizing fixed pulley 20-11 and the second lateral pressure stabilizing fixed pulley 20-12 into a whole; the lateral pressure stabilizing component wheel set 19-1 mainly comprises a first lateral pressure stabilizing movable pulley 19-11 at the upper part, a second lateral pressure stabilizing movable pulley 19-12 at the lower part and a fourth labor-saving wheel connecting plate which connects the first lateral pressure stabilizing movable pulley 19-11 and the second lateral pressure stabilizing movable pulley 19-12 into a whole; the second hook is arranged at one end, close to the lateral pressure stabilizing positioning wheel set 20-1, of the fourth labor-saving wheel connecting plate.

The second labor-saving wheel assembly is structurally characterized in that force transmission is carried out through two coaxial pulley assemblies with different diameters, so that load formed by load gravity is amplified through the labor-saving wheel assembly and then transmitted to a pressure stabilizing oil cylinder, and is transmitted to a sample through hydraulic pressure to form axial and/or lateral pressure stabilization.

Specifically, the method comprises the following steps: the axial labor-saving wheel unit comprises an axial pressure-stabilizing wheel shaft, and an axial pressure-stabilizing small wheel and an axial pressure-stabilizing large wheel which are coaxially arranged on the axial pressure-stabilizing wheel shaft, and the diameter of the axial pressure-stabilizing small wheel is smaller than that of the axial pressure-stabilizing large wheel; the axial labor-saving wheel unit is arranged on the loading frame 10, the fixed end of one axial pressure-stabilizing transmission rope 23 is wound on the axial pressure-stabilizing small wheel, the free end of the axial pressure-stabilizing transmission rope 23 is connected with the movable end of the axial pressure-stabilizing hydraulic component below, the fixed end of the other axial pressure-stabilizing transmission rope 23 is wound on the axial pressure-stabilizing large wheel, and the free end of the axial pressure-stabilizing transmission rope 23 is connected on an axial pressure-stabilizing load platform 24 for supporting the axial pressure-stabilizing weight 30 through the axial pressure-stabilizing first transmission wheel 21 and the axial pressure-stabilizing second transmission wheel 22 in sequence;

the lateral labor-saving wheel unit comprises a lateral pressure-stabilizing wheel shaft, a lateral pressure-stabilizing small wheel and a lateral pressure-stabilizing large wheel which are coaxially arranged on the lateral pressure-stabilizing wheel shaft, and the diameter of the lateral pressure-stabilizing small wheel is smaller than that of the lateral pressure-stabilizing large wheel; the lateral force-saving wheel unit is installed on the loading frame 10, the fixed end of one lateral pressure-stabilizing transmission rope 23-1 is wound on a lateral pressure-stabilizing small wheel, the free end of the lateral pressure-stabilizing transmission rope 23-1 is connected with the movable end of a lateral pressure-stabilizing hydraulic component below the lateral pressure-stabilizing small wheel, the fixed end of the other lateral pressure-stabilizing transmission rope 23-1 is wound on a lateral pressure-stabilizing large wheel, and the free end of the lateral pressure-stabilizing transmission rope 23-1 is connected to a lateral pressure-stabilizing load platform 24-1 for bearing the lateral pressure-stabilizing weight 30-1 sequentially through a lateral pressure-stabilizing first transmission wheel 21-1 and a lateral pressure-stabilizing second transmission wheel 22-1.

In order to further solve the problem of the size of the whole device in the height direction, in the embodiment, the axial pressure stabilizing first driving wheel 21 is fixedly installed on the loading frame 10, and the axial pressure stabilizing second driving wheel 22 capable of adjusting the center distance from the axial pressure stabilizing first driving wheel 21 is installed on the loading frame 10 in a sliding limiting manner. The height of the axial pressure-stabilizing transmission rope 23 in the vertical direction is reduced by adjusting the center distance between the axial pressure-stabilizing first transmission wheel 21 and the axial pressure-stabilizing second transmission wheel 22, so that the height design value of the whole equipment can be compressed.

The lateral pressure stabilizing first driving wheel 21-1 is fixedly arranged on the loading rack 10, and a lateral pressure stabilizing second driving wheel 22-1 capable of adjusting the center distance with the lateral pressure stabilizing first driving wheel 21-1 is arranged on the loading rack 10 in a sliding limiting mode. Similarly, the height of the lateral pressure stabilizing transmission rope 23-1 in the vertical direction is reduced by adjusting the center distance between the lateral pressure stabilizing first transmission wheel 21-1 and the lateral pressure stabilizing second transmission wheel 22-1, so that the height design value of the whole equipment can be compressed.

In this embodiment, the hydraulic station module is used for providing oil scheduling. The hydraulic station module comprises a main hydraulic cylinder 11-1, an A oil way 11-3 provided with an A valve 11-2, a B oil way 11-5 provided with a B valve 11-4, a C oil way 11-7 provided with a C valve 11-6, a D oil way 11-9 provided with a D valve 11-8, an E oil way 11-11 provided with an E valve 11-10, an F oil way 11-13 provided with an F valve 11-12, a G oil way 11-15 provided with a G valve 11-14 and an H oil way 11-17 provided with an H valve 11-16; the oil circuit A11-3 and the oil circuit B11-5 are connected with the main hydraulic cylinder 11-1 and the axial loading oil cylinder 7 in an inlet-outlet mode; the C oil path 11-7 is connected with a pressure-stabilizing loading oil outlet cavity of the axial pressure-stabilizing oil cylinder 13 and a pressure-stabilizing loading oil inlet cavity of the axial loading oil cylinder 7; one inlet of the D oil path 11-9 and one inlet of the E oil path 11-11 are connected with the main hydraulic cylinder 11-1 and the axial pressure stabilizing oil cylinder 13; one inlet of the F oil path 11-13 and one inlet of the G oil path 11-15 are connected with the main hydraulic cylinder 11-1 and the lateral pressure stabilizing oil cylinder 13-1; and the H oil path 11-17 is connected with the lateral pressure stabilizing oil cylinder 13-1 and the sample mounting cavity.

Of course, in order to control the on-off of each oil path conveniently, the test device further comprises a controller which is in electrical signal connection with the master hydraulic cylinder 11-1 and is in electrical signal connection with a valve arranged on the oil path.

The technical scheme not only solves the problem of how to apply high-tonnage axial load and high-stress lateral stress in the creep test process, but also ensures the long-term constancy of the loading condition under the complex coupling conditions of temperature, stress, seepage and the like along with the time extension, and fills the gap of the effectiveness of the long-term mechanical behavior test of the rock (body) under the multi-factor coupling at present. The technical scheme has the outstanding characteristics that the condition that the small tonnage or the small stress is applied to the large tonnage or the large stress in the loading process is ensured to be continuous, the stability of the loading condition under long-term loading is maintained, the measurement is more convenient and faster, and the measurement result is more reliable.

Further, the triaxial compression rheological test system also comprises a heating device 25 which is connected with the sample clamping assembly and is used for creating a high-temperature field; the heating means 25 is installed on the peripheral wall surface of the pressure chamber housing 5-1. The heating device can adopt heating elements such as resistance wires and the like.

Furthermore, the triaxial compression rheological test system also comprises a seepage device which is connected with the sample clamping assembly and is used for carrying out seepage medium permeation measurement and control; the seepage device comprises a seepage water inlet pipe 26-1 which penetrates through the pressure cavity base 5-2 and the lower force transmission column 3-2 to introduce water into the sample installation cavity, and a seepage water outlet pipe 26-2 which penetrates through the upper force transmission column 3-1 to introduce water out of the sample installation cavity; the seepage water inlet pipe 26-1 and the seepage water outlet pipe 26-2 are simultaneously connected with a seepage measurement and control module.

As shown in fig. 19, the loading mechanism of the triaxial compression rheology test system can provide a high stress field to the rock sample 4; the heating device 25 is arranged to provide a high temperature field to the rock sample 4; the seepage means is arranged to provide a seepage test environment for the rock sample 4. Meanwhile, a triaxial compression rheological test system with a loading mechanism, a heating device 25 and a seepage device is arranged, so that a strong damp-heat environment with surrounding rock in deep-buried high temperature, high stress and high seepage pressure three-high complex coupling can be simulated, and the result of a rock rheological test is ensured to be closer to actual data of a rock body.

Example 2:

this example presents a long duration high precision rheological test system that simulates deep ground complex conditions, which is a uniaxial compression rheological test system. As illustrated in fig. 5-7, the uniaxial compressive rheological testing system provides a reduced side loading assembly providing side loading, side stability relative to the triaxial compressive rheological testing system disclosed in example 1.

The single-shaft compression rheological test system comprises a sample mounting assembly, a loading mechanism and a hydraulic station module which is connected with the sample mounting assembly and the loading mechanism respectively for supplying liquid;

the loading mechanism comprises an axial loading assembly hydraulically connected with an axial loading oil cylinder 7;

the hydraulic station module comprises a main hydraulic cylinder 11-1, and the main hydraulic cylinder 11-1 is hydraulically connected with the axial loading oil cylinder 7 and the axial pressure stabilizing oil cylinder 13 through a group of oil ways; the axial pressure stabilizing oil cylinder 13 which can be communicated with the inner cavity of the axial loading oil cylinder 7 is also hydraulically connected with the axial loading oil cylinder 7 through an oil path, a pressure stabilizing oil outlet of the axial loading oil cylinder 7 is positioned in a pressure stabilizing loading oil outlet cavity of the axial loading oil cylinder 7, and a pressure stabilizing oil inlet of the axial loading oil cylinder 7 is positioned in a pressure stabilizing loading oil inlet cavity of the axial loading oil cylinder 7.

Still further, three exemplary axial surge hydraulic assembly configurations are provided in this embodiment.

The first axial steady voltage hydraulic drive assembly structure: as shown in fig. 5, the axial pressure stabilizing hydraulic assembly includes an axial pressure stabilizing cylinder 13, and an axial pressure stabilizing cylinder base 14 of the axial pressure stabilizing cylinder 13 is directly mounted on the loading frame 10; and an axial pressure stabilizing piston 12 of the axial pressure stabilizing oil cylinder 13 extends upwards and is connected with a force transmission end of the axial labor-saving wheel unit.

The second axial steady voltage hydraulic drive assembly structure: as shown in fig. 6, the axial pressure stabilizing hydraulic component includes an axial pressure stabilizing oil cylinder 13, an axial pressure stabilizing guide post 16, an axial pressure stabilizing connecting plate 17, an axial pressure stabilizing bearing plate 31, and an axial pressure stabilizing fixing post 32; the axial pressure stabilizing and bearing plate 31 is mounted on the loading rack 10 through an axial pressure stabilizing fixing column 32; an axial pressure stabilizing oil cylinder base 14 of the axial pressure stabilizing oil cylinder 13 is arranged at the bottom end of an axial pressure stabilizing guide column 16, and the top end of the axial pressure stabilizing guide column 16 penetrates through an axial pressure stabilizing bearing plate 31 to be connected with an axial pressure stabilizing connecting plate 17; the axial pressure stabilizing piston 12 of the axial pressure stabilizing oil cylinder 13 extends upwards and is connected to an upper axial pressure stabilizing bearing plate 31; the axial pressure-stabilizing connecting plate 17 is connected with the force transmission end of the upper axial labor-saving wheel unit.

The third axial steady voltage hydraulic drive assembly structure: as shown in fig. 7, the axial pressure stabilizing hydraulic assembly includes an axial pressure stabilizing oil cylinder 13, an axial pressure stabilizing guide post 16, an axial pressure stabilizing connecting plate 17, an axial pressure stabilizing bearing plate 31, and an axial pressure stabilizing fixing post 32; the axial pressure stabilizing oil cylinder base 14 of the axial pressure stabilizing oil cylinder 13 is arranged on the loading rack 10 through an axial pressure stabilizing fixing column 32; the axial pressure stabilizing piston 12 of the axial pressure stabilizing oil cylinder 13 extends downwards and is connected to the axial pressure stabilizing bearing plate 31 below; the axial pressure stabilizing bearing plate 31 is installed at the bottom end of the axial pressure stabilizing guide column 16, and the top end of the axial pressure stabilizing guide column 16 penetrates through the axial pressure stabilizing oil cylinder base 14 to be connected with the axial pressure stabilizing connecting plate 17; the axial pressure-stabilizing connecting plate 17 is connected with the force transmission end of the upper axial labor-saving wheel unit.

In this embodiment, the hydraulic station module is used for providing oil scheduling. The hydraulic station module comprises a main hydraulic cylinder 11-1, an A oil way 11-3 provided with an A valve 11-2, a B oil way 11-5 provided with a B valve 11-4, a C oil way 11-7 provided with a C valve 11-6, a D oil way 11-9 provided with a D valve 11-8, an E oil way 11-11 provided with an E valve 11-10, an F oil way 11-13 provided with an F valve 11-12, a G oil way 11-15 provided with a G valve 11-14 and an H oil way 11-17 provided with an H valve 11-16; the oil circuit A11-3 and the oil circuit B11-5 are connected with the main hydraulic cylinder 11-1 and the axial loading oil cylinder 7 in an inlet-outlet mode; the C oil path 11-7 is connected with a pressure-stabilizing loading oil outlet cavity of the axial pressure-stabilizing oil cylinder 13 and a pressure-stabilizing loading oil inlet cavity of the axial loading oil cylinder 7; the D oil path 11-9 and the E oil path 11-11 are connected with the main hydraulic cylinder 11-1 and the axial pressure stabilizing oil cylinder 13 in an inlet-outlet mode.

Moreover, the structure of the labor-saving wheel unit in this embodiment is the same as that of the labor-saving wheel unit disclosed in embodiment 1, and therefore the description thereof is omitted. Other parts of this embodiment are the same as those of the above embodiment, and thus are not described again.

Example 3:

this example presents a long duration high precision rheological test system that simulates deep ground complex conditions, which is a uniaxial extensional rheological test system. As shown in fig. 8-10, the uniaxial extensional rheology test system provides less side loading, laterally stable side loading assembly than the triaxial compressional rheology test system disclosed in example 1, while the specimen mount assembly provides not compressive but tensile forces to the specimen.

The uniaxial tension rheological test system comprises a sample mounting assembly, a loading mechanism and a hydraulic station module which is connected with the sample mounting assembly and the loading mechanism respectively for supplying liquid;

Further, the sample clamping assembly comprises an upper clamping seat 8-1 and a lower clamping seat 8-2 which jointly form a sample installation cavity; the top end of the upper clamping seat 8-1 is arranged on the mounting rack 1 through the load sensor 2; the bottom surface of the lower clamping seat 8-2 is connected with an axial loading piston 6 of an axial loading oil cylinder 7.

The first axial steady voltage hydraulic drive assembly structure: as shown in fig. 8, the axial pressure stabilizing hydraulic assembly includes an axial pressure stabilizing cylinder 13, and an axial pressure stabilizing cylinder base 14 of the axial pressure stabilizing cylinder 13 is directly mounted on the loading frame 10; and an axial pressure stabilizing piston 12 of the axial pressure stabilizing oil cylinder 13 extends upwards and is connected with a force transmission end of the axial labor-saving wheel unit.

The second axial steady voltage hydraulic drive assembly structure: as shown in fig. 9, the axial pressure stabilizing hydraulic component includes an axial pressure stabilizing oil cylinder 13, an axial pressure stabilizing guide post 16, an axial pressure stabilizing connecting plate 17, an axial pressure stabilizing bearing plate 31, and an axial pressure stabilizing fixing post 32; the axial pressure stabilizing and bearing plate 31 is mounted on the loading rack 10 through an axial pressure stabilizing fixing column 32; an axial pressure stabilizing oil cylinder base 14 of the axial pressure stabilizing oil cylinder 13 is arranged at the bottom end of an axial pressure stabilizing guide column 16, and the top end of the axial pressure stabilizing guide column 16 penetrates through an axial pressure stabilizing bearing plate 31 to be connected with an axial pressure stabilizing connecting plate 17; the axial pressure stabilizing piston 12 of the axial pressure stabilizing oil cylinder 13 extends upwards and is connected to an upper axial pressure stabilizing bearing plate 31; the axial pressure-stabilizing connecting plate 17 is connected with the force transmission end of the upper axial labor-saving wheel unit.

The third axial steady voltage hydraulic drive assembly structure: as shown in fig. 10, the axial pressure stabilizing hydraulic component includes an axial pressure stabilizing oil cylinder 13, an axial pressure stabilizing guide post 16, an axial pressure stabilizing connecting plate 17, an axial pressure stabilizing bearing plate 31, and an axial pressure stabilizing fixing post 32; the axial pressure stabilizing oil cylinder base 14 of the axial pressure stabilizing oil cylinder 13 is arranged on the loading rack 10 through an axial pressure stabilizing fixing column 32; the axial pressure stabilizing piston 12 of the axial pressure stabilizing oil cylinder 13 extends downwards and is connected to the axial pressure stabilizing bearing plate 31 below; the axial pressure stabilizing bearing plate 31 is installed at the bottom end of the axial pressure stabilizing guide column 16, and the top end of the axial pressure stabilizing guide column 16 penetrates through the axial pressure stabilizing oil cylinder base 14 to be connected with the axial pressure stabilizing connecting plate 17; the axial pressure-stabilizing connecting plate 17 is connected with the force transmission end of the upper axial labor-saving wheel unit.

Example 4:

in this embodiment, a structure of the laborsaving wheel unit will be specifically described on the basis of any one of embodiments 1 to 3. Aiming at a triaxial compression rheological test system, an axial labor-saving wheel unit and a lateral labor-saving wheel unit are labor-saving wheel units, and the axial labor-saving wheel unit and the lateral labor-saving wheel unit can be consistent in structure or can be inconsistent in structure.

As shown in fig. 14, a specific structure of the power saving wheel unit will be described by taking a lateral power saving wheel unit as an example. The lateral pressure stabilizing and positioning wheel set 20-1 mainly comprises a first lateral pressure stabilizing fixed pulley 20-11 at the upper part, a second lateral pressure stabilizing fixed pulley 20-12 at the lower part and a third labor-saving wheel connecting plate for connecting the first lateral pressure stabilizing fixed pulley 20-11 and the second lateral pressure stabilizing fixed pulley 20-12 into a whole; the lateral pressure stabilizing component wheel set 19-1 mainly comprises a first lateral pressure stabilizing movable pulley 19-11 at the upper part, a second lateral pressure stabilizing movable pulley 19-12 at the lower part and a fourth labor-saving wheel connecting plate which connects the first lateral pressure stabilizing movable pulley 19-11 and the second lateral pressure stabilizing movable pulley 19-12 into a whole; the second hook is arranged at one end, close to the lateral pressure stabilizing positioning wheel set 20-1, of the fourth labor-saving wheel connecting plate. Force analysis was performed, and when the load applied by a weight or the like was F1 in the vertical direction, as shown in fig. 15, F1=1/5F 2. However, due to space constraints, the load applied by a load such as a weight is normally F1 in an oblique direction, and as shown in fig. 16, the vertical component force Fy =1/5F2= F1 sin θ still belongs to labor-saving operation. Moreover, the design height of the entire apparatus can be greatly reduced.

The second labor-saving wheel assembly is structurally shown in fig. 17, force is transmitted through two coaxial pulley assemblies with different diameters, so that load formed by load gravity is amplified through the labor-saving wheel assembly and then transmitted to a pressure stabilizing oil cylinder, and is transmitted to a sample through hydraulic pressure to form axial and/or lateral pressure stabilization.

Furthermore, the lateral pressure stabilizing first driving wheel 21-1 and the lateral pressure stabilizing first driving wheel 22-1 are two driving wheel assemblies, and the axial pressure stabilizing first driving wheel 21 and the axial pressure stabilizing first driving wheel 22 are also two driving wheel assemblies. As shown in fig. 18, the position of the rear driving wheel in the two driving wheel assemblies is adjustable relative to the front driving wheel, and the length of the driving rope dragged by the load is reduced, so that the total height of the testing machine is further controlled, and the testing machine is suitable for application scenes such as laboratories with low floor heights.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.

Claims

1. The long-duration high-precision rheological test system for simulating the deep complex conditions is characterized in that: the rheological test system is a triaxial compression rheological test system; the triaxial compression rheological test system comprises a sample mounting assembly, a loading mechanism and a hydraulic station module which is connected with the sample mounting assembly and the loading mechanism respectively for supplying liquid, wherein the sample mounting assembly and the loading mechanism are connected with each other;

the sample mounting assembly comprises a mounting rack (1), and a load sensor (2), a sample clamping assembly and an axial loading oil cylinder (7) which are sequentially mounted in the mounting rack (1) from top to bottom; the sample clamping assembly is provided with a sample mounting cavity for clamping a sample, the top of the sample clamping assembly is mounted on the mounting rack (1) through a load sensor (2), and the bottom of the sample clamping assembly is connected with an axial loading piston (6) of an axial loading oil cylinder (7);

the loading mechanism comprises an axial loading assembly hydraulically connected with an axial loading oil cylinder (7), a lateral loading assembly hydraulically connected with the sample clamping assembly and a loading rack (10);

the axial loading assembly comprises an axial labor-saving wheel unit, an axial pressure-stabilizing first transmission wheel (21), an axial pressure-stabilizing second transmission wheel (22), an axial pressure-stabilizing transmission rope (23), an axial pressure-stabilizing hydraulic assembly, an axial pressure-stabilizing load platform (24) and an axial pressure-stabilizing weight (30); the fixed end of the axial pressure-stabilizing hydraulic component is arranged on the loading rack (10), and the movable end of the axial pressure-stabilizing hydraulic component is connected with the force transmission end of the axial labor-saving wheel unit; one end of the axial pressure-stabilizing transmission rope (23) is wound on the axial labor-saving wheel unit, and the other end of the axial pressure-stabilizing transmission rope is connected to an axial pressure-stabilizing load platform (24) for supporting an axial pressure-stabilizing weight (30) through an axial pressure-stabilizing first transmission wheel (21) and an axial pressure-stabilizing second transmission wheel (22) in sequence;

the lateral loading assembly comprises a lateral labor-saving wheel unit, a lateral pressure-stabilizing first transmission wheel (21-1), a lateral pressure-stabilizing second transmission wheel (22-1), a lateral pressure-stabilizing transmission rope (23-1), a lateral pressure-stabilizing hydraulic assembly, a lateral pressure-stabilizing load platform (24-1) and a lateral pressure-stabilizing weight (30-1); the fixed end of the lateral pressure-stabilizing hydraulic component is arranged on the loading rack (10), and the movable end of the lateral pressure-stabilizing hydraulic component is connected with the force transmission end of the lateral labor-saving wheel unit; one end of the lateral pressure-stabilizing transmission rope (23-1) is wound on the lateral labor-saving wheel unit, and the other end of the lateral pressure-stabilizing transmission rope is connected to a lateral pressure-stabilizing load platform (24-1) for bearing a lateral pressure-stabilizing weight (30-1) through a lateral pressure-stabilizing first transmission wheel (21-1) and a lateral pressure-stabilizing second transmission wheel (22-1) in sequence;

the hydraulic station module comprises a main hydraulic cylinder (11-1), and the main hydraulic cylinder (11-1) is hydraulically connected with the axial loading oil cylinder (7), the axial pressure stabilizing oil cylinder (13) and the lateral pressure stabilizing oil cylinder (13-1) through a group of oil ways; the axial pressure stabilizing oil cylinder (13) which can be communicated with the inner cavity of the axial loading oil cylinder (7) is also hydraulically connected with the axial loading oil cylinder (7) through an oil way, a pressure stabilizing oil outlet of the axial loading oil cylinder (7) is positioned in a pressure stabilizing loading oil outlet cavity of the axial loading oil cylinder (7), and a pressure stabilizing oil inlet of the axial loading oil cylinder (7) is positioned in a pressure stabilizing loading oil inlet cavity of the axial loading oil cylinder (7); and a lateral pressure stabilizing oil cylinder (13-1) which can be communicated with the sample mounting cavity of the sample clamping assembly is also hydraulically connected with the sample clamping assembly through an oil way.

2. The long duration high precision rheology test system to simulate deep complex conditions according to claim 1 characterized by: the sample clamping assembly comprises an upper force transmission column (3-1), a lower force transmission column (3-2), a pressure cavity shell (5-1) and a pressure cavity base (5-2) which form a sample mounting cavity together; the top end of the upper force transmission column (3-1) is installed on the installation rack (1) through a load sensor (2), and the bottom end of the upper force transmission column (3-1) extends into the pressure cavity shell (5-1) to be in sliding connection with the pressure cavity shell (5-1); the lower force transmission column (3-2) is arranged on the top surface of the pressure cavity base (5-2), and the bottom surface of the pressure cavity base (5-2) is connected with an axial loading piston (6) of an axial loading oil cylinder (7); the pressure cavity shell (5-1) and the pressure cavity base (5-2) are detachably connected.

3. The long duration high precision rheology test system to simulate deep complex conditions according to claim 1 characterized by: the axial pressure stabilizing hydraulic component comprises an axial pressure stabilizing oil cylinder (13), and an axial pressure stabilizing oil cylinder base (14) of the axial pressure stabilizing oil cylinder (13) is directly arranged on the loading rack (10); an axial pressure stabilizing piston (12) of the axial pressure stabilizing oil cylinder (13) extends upwards and is connected with a force transmission end of the axial labor-saving wheel unit;

the lateral pressure stabilizing hydraulic component comprises a lateral pressure stabilizing oil cylinder (13-1), and a lateral pressure stabilizing oil cylinder base (14-1) of the lateral pressure stabilizing oil cylinder (13-1) is directly arranged on the loading rack (10); and a lateral pressure stabilizing piston (12-1) of the lateral pressure stabilizing oil cylinder (13-1) extends upwards and is connected with a force transmission end of the lateral labor-saving wheel unit.

4. The long duration high precision rheology test system to simulate deep complex conditions according to claim 1 characterized by: the axial pressure stabilizing hydraulic component comprises an axial pressure stabilizing oil cylinder (13), an axial pressure stabilizing guide column (16), an axial pressure stabilizing connecting plate (17), an axial pressure stabilizing bearing plate (31) and an axial pressure stabilizing fixing column (32); the axial pressure stabilizing and bearing plate (31) is arranged on the loading rack (10) through an axial pressure stabilizing fixing column (32); an axial pressure stabilizing oil cylinder base (14) of the axial pressure stabilizing oil cylinder (13) is installed at the bottom end of an axial pressure stabilizing guide column (16), and the top end of the axial pressure stabilizing guide column (16) penetrates through an axial pressure stabilizing bearing plate (31) to be connected with an axial pressure stabilizing connecting plate (17); an axial pressure stabilizing piston (12) of the axial pressure stabilizing oil cylinder (13) extends upwards and is connected to an upper axial pressure stabilizing bearing plate (31); the axial pressure-stabilizing connecting plate (17) is connected with the force transmission end of the upper axial labor-saving wheel unit;

the lateral pressure stabilizing hydraulic component comprises a lateral pressure stabilizing oil cylinder (13-1), a lateral pressure stabilizing guide column (16-1), a lateral pressure stabilizing connecting plate (17-1), a lateral pressure stabilizing bearing plate (31-1) and a lateral pressure stabilizing fixing column (32-1); the lateral pressure stabilizing and bearing plate (31-1) is installed on the loading rack (10) through a lateral pressure stabilizing and fixing column (32-1); a lateral pressure stabilizing oil cylinder base (14-1) of the lateral pressure stabilizing oil cylinder (13-1) is installed at the bottom end of a lateral pressure stabilizing guide column (16-1), and the top end of the lateral pressure stabilizing guide column (16-1) penetrates through a lateral pressure stabilizing bearing plate (31-1) to be connected with a lateral pressure stabilizing connecting plate (17-1); a lateral pressure stabilizing piston (12-1) of the lateral pressure stabilizing oil cylinder (13-1) extends upwards and is connected to an upper lateral pressure stabilizing bearing plate (31-1); the lateral pressure-stabilizing connecting plate (17-1) is connected with the force transmission end of the lateral labor-saving wheel unit above.

5. The long duration high precision rheology test system to simulate deep complex conditions according to claim 1 characterized by: the axial pressure stabilizing hydraulic component comprises an axial pressure stabilizing oil cylinder (13), an axial pressure stabilizing guide column (16), an axial pressure stabilizing connecting plate (17), an axial pressure stabilizing bearing plate (31) and an axial pressure stabilizing fixing column (32); an axial pressure stabilizing oil cylinder base (14) of the axial pressure stabilizing oil cylinder (13) is arranged on the loading rack (10) through an axial pressure stabilizing fixing column (32); an axial pressure stabilizing piston (12) of the axial pressure stabilizing oil cylinder (13) extends downwards and is connected to an axial pressure stabilizing bearing plate (31) below; the axial pressure stabilizing bearing plate (31) is installed at the bottom end of the axial pressure stabilizing guide column (16), and the top end of the axial pressure stabilizing guide column (16) penetrates through the axial pressure stabilizing oil cylinder base (14) to be connected with the axial pressure stabilizing connecting plate (17); the axial pressure-stabilizing connecting plate (17) is connected with the force transmission end of the upper axial labor-saving wheel unit;

the lateral pressure stabilizing hydraulic component comprises a lateral pressure stabilizing oil cylinder (13-1), a lateral pressure stabilizing guide column (16-1), a lateral pressure stabilizing connecting plate (17-1), a lateral pressure stabilizing bearing plate (31-1) and a lateral pressure stabilizing fixing column (32-1); a lateral pressure stabilizing oil cylinder base (14-1) of the lateral pressure stabilizing oil cylinder (13-1) is arranged on the loading rack (10) through a lateral pressure stabilizing fixing column (32-1); a lateral pressure stabilizing piston (12-1) of the lateral pressure stabilizing oil cylinder (13-1) extends downwards and is connected to a lateral pressure stabilizing bearing plate (31-1) below; the lateral pressure stabilizing and bearing plate (31-1) is installed at the bottom end of the lateral pressure stabilizing guide column (16-1), and the top end of the lateral pressure stabilizing guide column (16-1) penetrates through the lateral pressure stabilizing oil cylinder base (14-1) to be connected with the lateral pressure stabilizing and connecting plate (17-1); the lateral pressure-stabilizing connecting plate (17-1) is connected with the force transmission end of the lateral labor-saving wheel unit above.

6. The long duration high precision rheology test system to simulate deep complex conditions according to any of claims 1-5 characterized by: the axial labor-saving wheel unit comprises an upper axial pressure-stabilizing positioning wheel set (20), a lower axial pressure-stabilizing component force wheel set (19) and a first hook arranged at the top of the axial pressure-stabilizing component force wheel set (19); one end of an axial pressure stabilizing transmission rope (23) is connected to the first hook, and the other end of the axial pressure stabilizing transmission rope bypasses the axial pressure stabilizing positioning wheel set (20) and the axial pressure stabilizing component wheel set (19) and then is connected to an axial pressure stabilizing load platform (24) for bearing an axial pressure stabilizing weight (30) through an axial pressure stabilizing first transmission wheel (21) and an axial pressure stabilizing second transmission wheel (22) in sequence;

the lateral labor-saving wheel unit comprises an upper lateral pressure-stabilizing positioning wheel set (20-1), a lower lateral pressure-stabilizing component force wheel set (19-1) and a second hook arranged at the top of the lateral pressure-stabilizing component force wheel set (19-1); one end of a lateral pressure stabilizing transmission rope (23-1) is connected to the second hook, and the other end of the lateral pressure stabilizing transmission rope bypasses the lateral pressure stabilizing positioning wheel set (20-1) and the lateral pressure stabilizing component wheel set (19-1), and then is connected to a lateral pressure stabilizing load platform (24-1) for supporting a lateral pressure stabilizing weight (30-1) through a lateral pressure stabilizing first transmission wheel (21-1) and a lateral pressure stabilizing second transmission wheel (22-1).

7. The long duration high precision rheology test system to simulate deep complex conditions according to claim 6 characterized by: the axial pressure stabilizing and positioning wheel set (20) mainly comprises an upper axial pressure stabilizing fixed pulley I, a lower axial pressure stabilizing fixed pulley II and a first labor-saving wheel connecting plate which connects the axial pressure stabilizing fixed pulley I and the axial pressure stabilizing fixed pulley II into a whole; the axial pressure stabilizing component force wheel set (19) mainly comprises an upper axial pressure stabilizing movable pulley I, a lower axial pressure stabilizing movable pulley II and a second labor-saving wheel connecting plate which connects the axial pressure stabilizing movable pulley I and the axial pressure stabilizing movable pulley II into a whole; the first hook is arranged at one end, close to the axial pressure stabilizing positioning wheel set (20), of the second labor-saving wheel connecting plate;

the lateral pressure stabilizing and positioning wheel set (20-1) mainly comprises a first lateral pressure stabilizing fixed pulley (20-11) at the upper part, a second lateral pressure stabilizing fixed pulley (20-12) at the lower part and a third labor-saving wheel connecting plate which integrally connects the first lateral pressure stabilizing fixed pulley (20-11) and the second lateral pressure stabilizing fixed pulley (20-12); the lateral pressure stabilizing component force wheel set (19-1) mainly comprises a first lateral pressure stabilizing movable pulley (19-11) at the upper part, a second lateral pressure stabilizing movable pulley (19-12) at the lower part and a fourth labor saving wheel connecting plate which connects the first lateral pressure stabilizing movable pulley (19-11) and the second lateral pressure stabilizing movable pulley (19-12) into a whole; the second hook is arranged at one end, close to the lateral pressure stabilizing positioning wheel set (20-1), of the fourth labor-saving wheel connecting plate.

8. The long duration high precision rheology test system to simulate deep complex conditions according to any of claims 1-5 characterized by: the axial labor-saving wheel unit comprises an axial pressure-stabilizing wheel shaft, and an axial pressure-stabilizing small wheel and an axial pressure-stabilizing large wheel which are coaxially arranged on the axial pressure-stabilizing wheel shaft, and the diameter of the axial pressure-stabilizing small wheel is smaller than that of the axial pressure-stabilizing large wheel; the axial labor-saving wheel unit is installed on the loading rack (10), the fixed end of one axial pressure-stabilizing transmission rope (23) is wound on the small axial pressure-stabilizing wheel, the free end of the axial pressure-stabilizing transmission rope (23) is connected with the movable end of the axial pressure-stabilizing hydraulic component below the axial pressure-stabilizing transmission rope, the fixed end of the other axial pressure-stabilizing transmission rope (23) is wound on the large axial pressure-stabilizing wheel, and the free end of the axial pressure-stabilizing transmission rope (23) is connected to an axial pressure-stabilizing load platform (24) for supporting the axial pressure-stabilizing weight (30) through the axial pressure-stabilizing first transmission wheel (21) and the axial pressure-stabilizing second transmission wheel (22) in;

the lateral labor-saving wheel unit comprises a lateral pressure-stabilizing wheel shaft, a lateral pressure-stabilizing small wheel and a lateral pressure-stabilizing large wheel which are coaxially arranged on the lateral pressure-stabilizing wheel shaft, and the diameter of the lateral pressure-stabilizing small wheel is smaller than that of the lateral pressure-stabilizing large wheel; the lateral pressure-stabilizing power transmission device is characterized in that the lateral labor-saving wheel unit is installed on a loading rack (10), the fixed end of one lateral pressure-stabilizing transmission rope (23-1) is wound on a lateral pressure-stabilizing small wheel, the free end of the lateral pressure-stabilizing transmission rope (23-1) is connected with the movable end of a lateral pressure-stabilizing hydraulic component below, the fixed end of the other lateral pressure-stabilizing transmission rope (23-1) is wound on a lateral pressure-stabilizing large wheel, the free end of the lateral pressure-stabilizing transmission rope (23-1) sequentially passes through a lateral pressure-stabilizing first transmission wheel (21-1), and a lateral pressure-stabilizing second transmission wheel (22-1) is connected on a lateral pressure-stabilizing load platform (24-1) for bearing a lateral pressure-stabilizing weight (30-.

9. The long duration high precision rheology test system to simulate deep complex conditions according to any of claims 1-5 characterized by: the axial voltage-stabilizing first driving wheel (21) is fixedly arranged on the loading rack (10), and an axial voltage-stabilizing second driving wheel (22) capable of adjusting the center distance with the axial voltage-stabilizing first driving wheel (21) is arranged on the loading rack (10) in a sliding limiting manner;

the lateral pressure stabilizing first driving wheel (21-1) is fixedly arranged on the loading rack (10), and a lateral pressure stabilizing second driving wheel (22-1) capable of adjusting the center distance with the lateral pressure stabilizing first driving wheel (21-1) is arranged on the loading rack (10) in a sliding limiting mode.

10. The long duration high precision rheology test system to simulate deep complex conditions according to claim 1 characterized by: the hydraulic station module comprises a main hydraulic cylinder (11-1), an oil way A (11-3) provided with a valve A (11-2), an oil way B (11-5) provided with a valve B (11-4), an oil way C (11-7) provided with a valve C (11-6), an oil way D (11-9) provided with a valve D (11-8), an oil way E (11-11) provided with an valve E (11-10), an oil way F (11-13) provided with a valve F (11-12), an oil way G (11-15) provided with a valve G (11-14) and an oil way H (11-17) provided with a valve H (11-16);

the oil circuit A (11-3) and the oil circuit B (11-5) are connected with the main hydraulic cylinder (11-1) and the axial loading oil cylinder (7) in an inlet-outlet mode; the C oil way (11-7) is connected with the axial pressure stabilizing oil cylinder (13) and the axial loading oil cylinder (7); the oil passages D (11-9) and the oil passages E (11-11) are connected with the main hydraulic cylinder (11-1) and the axial pressure stabilizing oil cylinder (13) in an inlet-outlet mode; the F oil path (11-13) and the G oil path (11-15) are connected with the main hydraulic cylinder (11-1) and the lateral pressure stabilizing oil cylinder (13-1) in an inlet-outlet mode; the H oil path (11-17) is connected with the lateral pressure stabilizing oil cylinder (13-1) and the sample mounting cavity;

the high-precision rheological test system also comprises a controller which is in electrical signal connection with the master hydraulic cylinder (11-1) and is in electrical signal connection with a valve arranged on an oil way.

11. The long duration high precision rheology test system to simulate deep complex conditions according to claim 2 characterised in that: the triaxial compression rheological test system also comprises a heating device (25) which is connected with the sample clamping assembly and is used for creating a high-temperature field; the heating device (25) is arranged on the peripheral wall surface of the pressure cavity shell (5-1).

12. The long duration high precision rheology test system to simulate deep complex conditions according to claim 2 characterised in that: the triaxial compression rheological test system also comprises a seepage device which is connected with the sample clamping assembly and is used for carrying out seepage medium permeation measurement and control; the seepage device comprises a seepage water inlet pipe (26-1) which penetrates through the pressure cavity base (5-2) and the lower force transmission column (3-2) to introduce water into the sample mounting cavity, and a seepage water outlet pipe (26-2) which penetrates through the upper force transmission column (3-1) to introduce water out of the sample mounting cavity; the seepage water inlet pipe (26-1) and the seepage water outlet pipe (26-2) are simultaneously connected with a seepage measurement and control module.

13. The long-duration high-precision rheological test system for simulating the deep complex conditions is characterized in that: the rheological test system is a single-shaft compression rheological test system; the single-shaft compression rheological test system comprises a sample mounting assembly, a loading mechanism and a hydraulic station module which is connected with the sample mounting assembly and the loading mechanism respectively for supplying liquid;

the loading mechanism comprises an axial loading assembly hydraulically connected with an axial loading oil cylinder (7);

the hydraulic station module comprises a main hydraulic cylinder (11-1), and the main hydraulic cylinder (11-1) is hydraulically connected with the axial loading oil cylinder (7) and the axial pressure stabilizing oil cylinder (13) through a group of oil ways; the axial pressure stabilizing oil cylinder (13) which can be communicated with the inner cavity of the axial loading oil cylinder (7) is also hydraulically connected with the axial loading oil cylinder (7) through an oil way, a pressure stabilizing oil outlet of the axial loading oil cylinder (7) is positioned in a pressure stabilizing loading oil outlet cavity of the axial loading oil cylinder (7), and a pressure stabilizing oil inlet of the axial loading oil cylinder (7) is positioned in a pressure stabilizing loading oil inlet cavity of the axial loading oil cylinder (7).

14. The long duration high precision rheology test system to simulate deep complex conditions according to claim 13 characterised in that: the sample clamping assembly comprises an upper force transmission column (3-1), a lower force transmission column (3-2), a pressure cavity shell (5-1) and a pressure cavity base (5-2) which form a sample mounting cavity together; the top end of the upper force transmission column (3-1) is installed on the installation rack (1) through a load sensor (2), and the bottom end of the upper force transmission column (3-1) extends into the pressure cavity shell (5-1) to be in sliding connection with the pressure cavity shell (5-1); the lower force transmission column (3-2) is arranged on the top surface of the pressure cavity base (5-2), and the bottom surface of the pressure cavity base (5-2) is connected with an axial loading piston (6) of an axial loading oil cylinder (7); the pressure cavity shell (5-1) and the pressure cavity base (5-2) are detachably connected.

15. The long duration high precision rheology test system to simulate deep complex conditions according to claim 13 characterised in that: the axial pressure stabilizing hydraulic component comprises an axial pressure stabilizing oil cylinder (13), and an axial pressure stabilizing oil cylinder base (14) of the axial pressure stabilizing oil cylinder (13) is directly arranged on the loading rack (10); and an axial pressure stabilizing piston (12) of the axial pressure stabilizing oil cylinder (13) extends upwards and is connected with the force transmission end of the axial labor-saving wheel unit.

16. The long duration high precision rheology test system to simulate deep complex conditions according to claim 13 characterised in that: the axial pressure stabilizing hydraulic component comprises an axial pressure stabilizing oil cylinder (13), an axial pressure stabilizing guide column (16), an axial pressure stabilizing connecting plate (17), an axial pressure stabilizing bearing plate (31) and an axial pressure stabilizing fixing column (32); the axial pressure stabilizing and bearing plate (31) is arranged on the loading rack (10) through an axial pressure stabilizing fixing column (32); an axial pressure stabilizing oil cylinder base (14) of the axial pressure stabilizing oil cylinder (13) is installed at the bottom end of an axial pressure stabilizing guide column (16), and the top end of the axial pressure stabilizing guide column (16) penetrates through an axial pressure stabilizing bearing plate (31) to be connected with an axial pressure stabilizing connecting plate (17); an axial pressure stabilizing piston (12) of the axial pressure stabilizing oil cylinder (13) extends upwards and is connected to an upper axial pressure stabilizing bearing plate (31); and the axial pressure-stabilizing connecting plate (17) is connected with the force transmission end of the upper axial labor-saving wheel unit.

17. The long duration high precision rheology test system to simulate deep complex conditions according to claim 13 characterised in that: the axial pressure stabilizing hydraulic component comprises an axial pressure stabilizing oil cylinder (13), an axial pressure stabilizing guide column (16), an axial pressure stabilizing connecting plate (17), an axial pressure stabilizing bearing plate (31) and an axial pressure stabilizing fixing column (32); an axial pressure stabilizing oil cylinder base (14) of the axial pressure stabilizing oil cylinder (13) is arranged on the loading rack (10) through an axial pressure stabilizing fixing column (32); an axial pressure stabilizing piston (12) of the axial pressure stabilizing oil cylinder (13) extends downwards and is connected to an axial pressure stabilizing bearing plate (31) below; the axial pressure stabilizing bearing plate (31) is installed at the bottom end of the axial pressure stabilizing guide column (16), and the top end of the axial pressure stabilizing guide column (16) penetrates through the axial pressure stabilizing oil cylinder base (14) to be connected with the axial pressure stabilizing connecting plate (17); and the axial pressure-stabilizing connecting plate (17) is connected with the force transmission end of the upper axial labor-saving wheel unit.

18. The long duration high precision rheology test system to simulate deep complex conditions according to claim 14 characterised in that: the triaxial compression rheological test system also comprises a heating device (25) which is connected with the sample clamping assembly and is used for creating a high-temperature field; the heating device (25) is arranged on the peripheral wall surface of the pressure cavity shell (5-1).

19. The long duration high precision rheology test system to simulate deep complex conditions according to claim 14 characterised in that: the triaxial compression rheological test system also comprises a seepage device which is connected with the sample clamping assembly and is used for carrying out seepage medium permeation measurement and control; the seepage device comprises a seepage water inlet pipe (26-1) which penetrates through the pressure cavity base (5-2) and the lower force transmission column (3-2) to introduce water into the sample mounting cavity, and a seepage water outlet pipe (26-2) which penetrates through the upper force transmission column (3-1) to introduce water out of the sample mounting cavity; the seepage water inlet pipe (26-1) and the seepage water outlet pipe (26-2) are simultaneously connected with a seepage measurement and control module.

20. The long-duration high-precision rheological test system for simulating the deep complex conditions is characterized in that: the rheological test system is a uniaxial tensile rheological test system; the uniaxial tension rheological test system comprises a sample mounting assembly, a loading mechanism and a hydraulic station module which is connected with the sample mounting assembly and the loading mechanism respectively for supplying liquid;

21. The long duration high precision rheology test system to simulate deep complex conditions according to claim 16 characterised in that: the sample clamping assembly comprises an upper clamping seat (8-1) and a lower clamping seat (8-2) which jointly form a sample mounting cavity; the top end of the upper clamping seat (8-1) is installed on the installation rack (1) through the load sensor (2); the bottom surface of the lower clamping seat (8-2) is connected with an axial loading piston (6) of an axial loading oil cylinder (7).

22. The long duration high precision rheology test system to simulate deep complex conditions according to claim 20 characterised in that: the axial pressure stabilizing hydraulic component comprises an axial pressure stabilizing oil cylinder (13), and an axial pressure stabilizing oil cylinder base (14) of the axial pressure stabilizing oil cylinder (13) is directly arranged on the loading rack (10); and an axial pressure stabilizing piston (12) of the axial pressure stabilizing oil cylinder (13) extends upwards and is connected with the force transmission end of the axial labor-saving wheel unit.

23. The long duration high precision rheology test system to simulate deep complex conditions according to claim 20 characterised in that: the axial pressure stabilizing hydraulic component comprises an axial pressure stabilizing oil cylinder (13), an axial pressure stabilizing guide column (16), an axial pressure stabilizing connecting plate (17), an axial pressure stabilizing bearing plate (31) and an axial pressure stabilizing fixing column (32); the axial pressure stabilizing and bearing plate (31) is arranged on the loading rack (10) through an axial pressure stabilizing fixing column (32); an axial pressure stabilizing oil cylinder base (14) of the axial pressure stabilizing oil cylinder (13) is installed at the bottom end of an axial pressure stabilizing guide column (16), and the top end of the axial pressure stabilizing guide column (16) penetrates through an axial pressure stabilizing bearing plate (31) to be connected with an axial pressure stabilizing connecting plate (17); an axial pressure stabilizing piston (12) of the axial pressure stabilizing oil cylinder (13) extends upwards and is connected to an upper axial pressure stabilizing bearing plate (31); and the axial pressure-stabilizing connecting plate (17) is connected with the force transmission end of the upper axial labor-saving wheel unit.

24. The long duration high precision rheology test system to simulate deep complex conditions according to claim 20 characterised in that: the axial pressure stabilizing hydraulic component comprises an axial pressure stabilizing oil cylinder (13), an axial pressure stabilizing guide column (16), an axial pressure stabilizing connecting plate (17), an axial pressure stabilizing bearing plate (31) and an axial pressure stabilizing fixing column (32); an axial pressure stabilizing oil cylinder base (14) of the axial pressure stabilizing oil cylinder (13) is arranged on the loading rack (10) through an axial pressure stabilizing fixing column (32); an axial pressure stabilizing piston (12) of the axial pressure stabilizing oil cylinder (13) extends downwards and is connected to an axial pressure stabilizing bearing plate (31) below; the axial pressure stabilizing bearing plate (31) is installed at the bottom end of the axial pressure stabilizing guide column (16), and the top end of the axial pressure stabilizing guide column (16) penetrates through the axial pressure stabilizing oil cylinder base (14) to be connected with the axial pressure stabilizing connecting plate (17); and the axial pressure-stabilizing connecting plate (17) is connected with the force transmission end of the upper axial labor-saving wheel unit.