Miniature loess power loading system

Abstract

The invention discloses a miniature loess power loading system, which comprises a main body assembly, a power loading assembly arranged in a main box body, and an interaction piece arranged in the main box body, the power loading assembly comprises a gear motor, a proximity switch, a lever, an eccentric wheel and a weight, the eccentric wheel is arranged on the gear motor, a lever connecting frame used for being connected with the lever is arranged in the main box body, the weight is arranged at the end, away from the eccentric wheel, of the lever, and an eccentric pulley is arranged on the eccentric wheel; the eccentric pulley rotates along with the eccentric wheel and then drives the lever to rotate; according to the system, the displacement precision is controlled to be 0.001 mm, the size of a sample is adjustable, the power loading device is controlled by a direct current motor, the frequency is adjustable, the multi-size and multi-frequency test conditions are achieved, secondly, the system achieves power loading of a millimeter-level sample for the first time, and the test efficiency is improved. The displacement change condition of the sample can be detected in real time in the loading process.

Description

Technical Field

[0001] The invention relates to the technical field of geological engineering experimental testing, and in particular to a micro loess dynamic loading system. Background Art

[0002] Strong structural soils, represented by loess, have the characteristics of particle contact and open pore structure. The bonding force between soil particles is very weak and the strength is low. Under the action of earthquake force or traffic vibration load, the large pore structure is destroyed and the powder particles fall into the large pores. Macroscopically, it manifests as sudden subsidence of the soil, causing deformation or even failure of the foundation of the building (structure). The microstructural characteristics of loess, such as particle contact mode, pore size, and pore structure characteristics, have a fundamental impact on the earthquake (vibration) subsidence deformation of the soil. Studying the evolution law of microstructure during soil deformation is an important means to analyze the physical and mechanical properties of soil and the deformation and failure mechanism.

[0003] At present, the main means of analyzing the microstructure of loess and other strongly structural soils include microscopes, scanning electron microscopes and CT technology, which have been widely used in the microstructure research of structural soils, especially high-precision µm-CT. Compared with microscopes and scanning electron microscopes, it can achieve non-destructive observation with micron and nanometer resolution, and obtain two-dimensional and three-dimensional microstructure images of soil microstructures. It has become the core observation method in the field of microstructure research. The microstructure observation accuracy based on µm-CT is closely related to the soil particle size and the scanning sample size. First, the loess particle size is concentrated between a few microns and tens of microns, which requires the microstructure observation accuracy to reach the micron level; secondly, the scanning accuracy of µm-CT is inversely proportional to the size of the sample. The micron-level accuracy requires the sample size to be at the millimeter level.

[0004] At present, the size of the test specimens commonly used for dynamic properties testing of structural soils such as loess is tens of centimeters, which cannot achieve high-precision µm-CT dynamic scanning, greatly restricting related research on the response mechanism of the microstructure of strong structural soils such as loess under dynamic loads. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above-mentioned problems existing in the existing micro loess dynamic loading system, the present invention is proposed.

[0007] Therefore, the object of the present invention is to provide a micro loess dynamic loading system.

[0008] To solve the above technical problems, the present invention provides the following technical solutions: a micro loess power loading system, comprising: a main body component, including a main box, a power loading component arranged in the main box, and an interactive component arranged in the main box; the power loading component includes a reduction motor, a proximity switch, a proximity switch sensor, a lever, an eccentric wheel, and a weight, the eccentric wheel is arranged on the reduction motor, a lever connecting frame for connecting the lever is provided in the main box, the weight is arranged at one end of the lever away from the eccentric wheel, an eccentric pulley is provided on the eccentric wheel, and the eccentric pulley drives the lever to rotate after the eccentric wheel rotates; and a measuring component, the measuring component is arranged in the main box.

[0009] As a preferred solution of the micro loess power loading system described in the present invention, the interactive component includes an interactive display arranged on the main box, a switch component arranged on the main box, a frequency adjustment component arranged on the main box, and a sensor module arranged in the main box. A main control circuit is arranged in the main box, the main control circuit is electrically connected to the sensor module, and the switch component is used to control the opening and closing of the main control circuit.

[0010] As a preferred solution of the micro loess power loading system described in the present invention, the ratio of the straight-line length between the left end of the lever and the hinge to the straight-line length between the right end of the lever and the hinge is 1:2, a connecting screw is provided at the end of the lever away from the eccentric wheel, the weight is threadedly connected to the connecting screw, and a loading head is provided at the lower end of the connecting screw that passes through the lever downward.

[0011] As a preferred solution of the micro loess power loading system described in the present invention, wherein: a base is provided in the main box body, a straightening sleeve is provided on the base, a linear shaft is provided in the straightening sleeve, the inner diameter of the straightening sleeve is the same as the outer diameter of the linear shaft, a displacement plate is provided in the main box body, and the lever contacts the displacement plate after moving.

[0012] As a preferred solution of the micro loess dynamic loading system described in the present invention, wherein: a sample sleeve is provided inside the righting sleeve, the base is a hollow cylindrical structure, the righting sleeve is located inside the base, and its maximum outer diameter is the same as the inner diameter of the base, the sample sleeve is fixed by the righting sleeve, the inside of the righting sleeve is a hollow cylindrical structure, and the inner diameter of the righting sleeve is the same as the outer diameter of the sample sleeve.

[0013] As a preferred solution of the micro loess dynamic loading system of the present invention, the pressure head is located above the sample, and there is a linear axis above the pressure head. The pressure head is fixed on the linear axis and the straightening sleeve is tightly attached.

[0014] As a preferred solution of the micro loess power loading system described in the present invention, wherein: a guide rail is provided on the inner surface of the main box body, a slider is provided on the guide rail, a fixed pulley is provided between the two guide rails, a steel wire is provided on the fixed pulley, and both ends of the steel wire are respectively connected to the sliders on the two guide rails.

[0015] As a preferred solution of the micro loess dynamic loading system described in the present invention, the measuring component includes a laser displacement sensor arranged in the main box, the laser displacement sensor detects displacement changes, collects data information and outputs it through the upper computer software, and an adjustment component is provided on the laser displacement sensor.

[0016] As a preferred solution of the micro loess power loading system described in the present invention, the adjustment component includes a mounting block arranged in the main box body, a slot opened in the mounting block, a first movable plate and a second movable plate arranged in the slot, the first movable plate is provided with a first clamping tooth, the second movable plate is provided with a second clamping tooth, the second movable plate is located below the first movable plate, and the second movable plate is provided with a clamping piece close to the side of the first movable plate, and the clamping piece cooperates with the first clamping tooth.

[0017] As a preferred solution of the micro loess power loading system described in the present invention, wherein: a connecting block is provided on the laser displacement sensor, a clamp is also provided on the connecting block, the clamp cooperates with the second clamp, baffles are provided on the side walls of the first movable plate and the second movable plate, a connecting frame rod is provided on the mounting block, the lower end of the connecting frame rod is hinged to the mounting block, four connecting frame rods are provided, arranged opposite to each other, and driving cylinders are provided at the ends of two adjacent connecting frame rods, a sleeve is provided on the output shaft of the driving cylinder, and the sleeve is connected to the connecting block.

[0018] Beneficial effects of the present invention: The power loading assembly is composed of a reduction motor, a lever, an eccentric wheel, a loading head, etc. The lever, driven by the reduction motor, provides power by driving the weight upward (the weight moves downward as a free fall motion), and the displacement measuring device is located between the two guide rails, which is used to detect the displacement change of the sample in real time. The system developed this time controls the displacement accuracy to 0.001mm, and the sample size is adjustable. The power loading device is controlled by a DC motor with an adjustable frequency, realizing multi-size and multi-frequency test conditions. Secondly, this system realizes the power loading of millimeter-level samples for the first time, and can detect the displacement change of the sample in real time during the loading process. The sample can be freely disassembled and taken out during the loading process for a series of operations such as µm-CT scanning, realizing the full tracking of the microstructure during the sample loading and deformation process, and providing strong equipment support for the study of the microstructure evolution of soil samples under dynamic loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 It is a front view schematic diagram of the overall structure of the micro loess dynamic loading system of the present invention.

[0020] Figure 2 This is a side view of the overall structure of the micro loess dynamic loading system of the present invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the micro loess dynamic loading system of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of the straightening sleeve described in the micro loess dynamic loading system of the present invention.

[0023] Figure 5 This is a schematic diagram of the adjustment components of the micro loess power loading system of the present invention.

[0024] Figure 6 It is a cross-sectional schematic diagram of the adjustment components of the micro loess dynamic loading system of the present invention.

[0025] Figure 7 This is an exploded schematic diagram of the adjustment components described in the micro loess dynamic loading system of the present invention.

[0026] Figure 8 It is a schematic diagram of the sample strain-vibration number curve described in the micro loess dynamic loading system of the present invention. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. Example 1

[0028] Reference Figure 1-7 A micro loess power loading system is provided, including a main component 100. In this embodiment, the main component 100 includes a main box 101, a power loading component 200 arranged in the main box 101, and an interactive component 103 arranged in the main box 101. The main material of the main box 101 is aluminum alloy and stainless steel, which ensures the stability and firmness of the box structure.

[0029] Preferably, the interactive component 103 includes an interactive display 103a arranged on the main box 101, a switch component 103b arranged on the main box 101, a frequency adjustment component 103c arranged on the main box 101, and a sensor module 103d arranged in the main box 101. A main control circuit is arranged in the main box 101, and the main control circuit is electrically connected to the sensor module 103d. The main control circuit serves as the main circuit and software storage module of the entire system. A processor is arranged inside the main control circuit for handling all tasks. The switch component 103b is used to control the opening and closing of the main control circuit.

[0030] Furthermore, the present invention also includes a power loading component 200. In the present embodiment, the power loading component 200 includes a reduction motor 201, a proximity switch 202, a proximity switch 202 sensor, a lever 204, an eccentric wheel 205, and a weight 206. The eccentric wheel 205 is arranged on the reduction motor 201. A lever 204 connecting frame for connecting the lever 204 is provided in the main box 101. The weight 206 is arranged at one end of the lever 204 away from the eccentric wheel 205. An eccentric pulley 205a is provided on the eccentric wheel 205. The eccentric pulley 205a drives the lever 204 to rotate after the eccentric wheel 205 rotates.

[0031] Furthermore, the weight 206 is located on the left side of the lever 204. The weight 206 can be freely removed and replaced with different weights, and can be used in combination. When the lever 204 drives the weight 206 to move up to the loading head 103e and not in contact with the displacement plate 105, the pressure is zero. When the lever 204 moves down to contact with the displacement plate 105, the pressure value borne by the sample is the weight of the weight 206.

[0032] Preferably, the axial force range, i.e. the weight of the weight 206, is divided into 8 levels and can be freely assembled (respectively: 0.1N, 0.2N, 0.5N, 1N, 2N, 5N, 10N, 20N), and the frequency control range is 0.5HZ, 1HZ, 2HZ.

[0033] During operation, the operator turns on the switch, sets the frequency, and the reduction motor 201 starts working. The reduction motor 201 rotates to drive the eccentric wheel 205 and the eccentric pulley 205a to rotate. At this time, the lever 204 starts to drive the weight 206 to move upward under the drive of the eccentric pulley 205a. At this time, the weight 206 is not in contact with the displacement plate 105. The weight 206 moves downward (free fall) until the loading head 103e starts to contact the displacement plate 105. At this time, the displacement plate 105 is pressed down, and the linear shaft 104b is pressed down to drive the pressure head 106 to press down. The pressure is the weight of the weight 206.

[0034] Preferably, the ratio of the straight-line length between the left end of the lever 204 and the hinge to the straight-line length between the right end of the lever 204 and the hinge is 1:2, a connecting screw is provided at the end of the lever 204 away from the eccentric wheel 205, the weight 206 is threadedly connected to the connecting screw, and an extension rod is provided at the lower end of the connecting screw and passes downward through the lever 204.

[0035] Furthermore, a base 104 is provided in the main housing 101, a stabilizing sleeve 104a is provided on the base 104, a linear shaft 104b is provided in the stabilizing sleeve 104a, the inner diameter of the stabilizing sleeve is the same as the outer diameter of the linear shaft 104b, a loading head 103e is provided in the main housing 101, a displacement plate 105 is provided in the main housing 101, and the lever 204 contacts the displacement plate 105 after moving.

[0036] When the displacement plate 105 begins to move downward under pressure, the displacement plate 105 will simultaneously drive the linear shaft 104b to move downward. The linear shaft 104b is connected to the pressure head 106, and the pressure head 106 applies force to the sample inside the sample sleeve.

[0037] Furthermore, a sample sleeve is provided in the righting sleeve 104a, the base 104 is a hollow cylindrical structure, the righting sleeve 104a is located in the base 104, and its maximum outer diameter is the same as the inner diameter of the base 104, the sample sleeve is fixed by the righting sleeve 104a, the inside of the righting sleeve 104a is a hollow cylindrical structure, and the inner diameter of the righting sleeve 104a is the same as the outer diameter of the sample sleeve.

[0038] Furthermore, the pressure head 106 is located above the sample, and above the pressure head 106 is a linear shaft 104b, the pressure head 106 is fixed on the linear shaft 104b and the straightening sleeve is tightly attached. Preferably, the pressure head 106 is equipped with three groups, and the sizes match the three groups of sample sleeves.

[0039] Furthermore, a guide rail 207a is provided on the inner surface of the main box body 101, and there are two guide rails 207a, which are arranged opposite to each other. A slider 207b is provided on each guide rail 207a, and a fixed pulley 207c is provided between the two guide rails 207a. A steel wire 207d is provided on the fixed pulley 207c, and both ends of the steel wire 207d are respectively connected to the sliders 207b on the two guide rails 207a, and the displacement plate 105 is respectively provided on each slider 207b, and slides with the sliding of the slider 207b.

[0040] Furthermore, the present invention also includes a measuring component 208, which is arranged in the main box 101. The measuring component 208 includes a laser displacement sensor 208a arranged in the main box 101. The laser displacement sensor 208a detects displacement changes, collects data information and outputs it through the upper computer software. The laser displacement sensor 208a is provided with an adjustment component 300.

[0041] In this embodiment, the adjustment component 300 includes a mounting block 301 arranged in the main box body, a slot 302 is opened in the mounting block 301, a retaining ring is also arranged at the notch position of the slot 302, the retaining ring is made of rubber, and the slot 302 is blocked, and a first movable plate 303 and a second movable plate 304 are also arranged in the slot 302. The first movable plate 303 and the second movable plate 304 are arc-shaped, and when observed from the notch of the slot 302, the first movable plate 303 and the second movable plate 304 are perpendicular to each other, the first movable plate 303 is arranged at the bottom of the slot 302, and the second movable plate 304 is arranged at the notch position close to the slot 302.

[0042] Furthermore, a first latch tooth 305 is provided on the first movable plate 303, and the first latch teeth 305 are arranged equidistantly, and a second latch tooth 306 is provided on the second movable plate 304. The setting method of the first latch tooth 305 is consistent with the setting method of the second latch tooth 306, and the second movable plate 304 is located below the first movable plate 303, and a clamping member 307 is provided on the side of the second movable plate 304 close to the first movable plate 303. In this embodiment, the clamping member 307 is fixed to the side wall of the second movable plate 304 by bolts as a whole, and a mating protrusion that cooperates with the first latch tooth 305 is formed on the side of the clamping member 307 away from the second movable plate 304. When the second movable plate 304 moves, the clamping member 307 continuously meshes with the first latch tooth 305, and then the setting density of the first latch tooth 305 and the size setting of the clamping member 307 can set the moving gear of the second movable plate 304.

[0043] Further, a connecting block 308 is provided on the laser displacement sensor, and a clamping member 307 is also provided on the connecting block 308. The clamping member 307 cooperates with the second clamping tooth 306. A baffle 309 is provided on the side wall of the first movable plate 303 and the second movable plate 304. Further, baffles 309 are fixed on the side walls of the first movable plate 303 and the second movable plate 304. The shape of the baffle 309 is the same as the cross-sectional shape of the first movable plate 303 and the second movable plate 304, and the area of ​​the baffle 309 is slightly larger, and the height is the height of the first clamping tooth 305. The purpose of providing the baffle 309 is to prevent the connecting block 308 from moving in the second movable plate 303. When the movable plate 304 moves in the length direction, the card strip on the second movable plate 304 will drive the first movable plate 303 to move under the action of the baffle 309, so that the first movable plate 303 can slide on the second movable plate 304, thereby realizing the movement of the connecting block 308 in the length direction of the second movable plate 304. At the same time, when the card strip on the second movable plate 304 or the card strip on the connecting block 308 moves on their respective first movable plate 303 or second movable plate 304, the baffle 309 will prevent the card strip on the second movable plate 304 or the card strip on the connecting block 308 from detaching from the first movable plate 303 or the second movable plate 304.

[0044] Furthermore, a connecting rod 309a is provided on the mounting block 301, and the lower end of the connecting rod 309a is hinged to the mounting block 301. There are four connecting rods 309a, which are arranged opposite to each other in pairs, and driving cylinders 309b are provided at the ends of two adjacent connecting rods 309a. A sleeve 309c is provided on the output shaft of the driving cylinder 309b, and the sleeve 309c is connected to the connecting block 308. A sleeve 309c is also provided on the connecting rod 309a opposite to this connecting rod 309a, and is also sleeved on the connecting block 308. Example 2

[0045] Reference Figure 8 , this embodiment proves the beneficial effects by setting specific implementation cases: This case uses a sample with a height of 33mm and a diameter of 20mm for the experiment. The following is the specific experimental method: S1: Place the device on a level table or platform.

[0046] S2: Lift the linear shaft 104b and install the pressure head 106 matching the sample sleeve.

[0047] S3: Place the dry permeable gasket into the straightening sleeve and place clean filter paper on top.

[0048] S4: Place the straightening sleeve 104a matching the sample sleeve inside the base 104, above the water-permeable gasket.

[0049] S5: The organic glass tube containing the soil sample is inserted into the central hole inside the straightening sleeve 104a, and the tube wall is tightly fitted with the inner wall of the hole.

[0050] S6: Gently lower the linear axis 104b and place the fixed pulley 207c in a balanced position.

[0051] S7: Replace the weight 206 to the required weight.

[0052] S8: Gently place the lever 204 in a balanced position, with the right side of the lever 204 in contact with the eccentric pulley 205a.

[0053] S9: Turn on the switch and adjust the speed to 60 (vibration frequency 1 Hz), the reduction motor 201 starts to rotate, and the lever 204 drives the weight 206 to move upward.

[0054] S10: Observe the displacement sensor readings. When numbers start to appear on the displacement sensor, start collecting data.

[0055] S11: According to the test plan, when the displacement data changes significantly, stop loading, gently lift the linear axis 104b by hand, carefully take out the plexiglass tube and soil sample, and put them into the CT scanning room for scanning after packaging with a moisturizing film.

[0056] S12: If subsequent loading is necessary, the moisturizing film can be removed, and the soil sample can be repositioned according to the above steps and the loading process can be repeated.

[0057] See also Figure 8 The figure shows the sample strain-vibration number curve. The soil sample uses original loess. The curve reproduces the very obvious strain characteristics of the soil sample under dynamic load, especially when the vibration number reaches 40 and 120 times, there will be an obvious sudden increase in strain.

[0058] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0059] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0060] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A micro loess dynamic loading system, characterized in that: include, The main body assembly (100) comprises a main box (101), a power loading assembly (200) arranged in the main box (101), and an interactive component (103) arranged in the main box (101); The power loading assembly (200) comprises a reduction motor (201), a proximity switch (202), a proximity switch (202) sensor, a lever (204), an eccentric wheel (205), and a weight (206); the eccentric wheel (205) is arranged on the reduction motor (201); a lever (204) connecting frame for connecting the lever (204) is arranged in the main housing (101); the weight (206) is arranged at one end of the lever (204) away from the eccentric wheel (205); an eccentric pulley (205a) is arranged on the eccentric wheel (205); the eccentric pulley (205a) drives the lever (204) to rotate after the eccentric wheel (205) rotates; and, A measuring component (208), wherein the measuring component (208) is arranged in the main box (101).

2. The micro loess dynamic loading system according to claim 1, characterized in that: The interactive component (103) comprises an interactive display (103a) arranged on the main box (101), a switch component (103b) arranged on the main box (101), a frequency adjustment component (103c) arranged on the main box (101), and a sensor module (103d) arranged in the main box (101); a main control circuit is arranged in the main box (101); the main control circuit is electrically connected to the sensor module (103d); and the switch component (103b) is used to control the opening and closing of the main control circuit.

3. The micro loess dynamic loading system according to claim 1 or 2, characterized in that: The ratio of the straight line length between the left end of the lever (204) and the hinge point to the straight line length between the right end of the lever (204) and the hinge point is 1:

2. A connecting screw is provided at one end of the lever (204) away from the eccentric wheel (205). The weight (206) is threadedly connected to the connecting screw. A loading head (103e) is provided at the lower end of the connecting screw that passes through the lever (204) downward.

4. The micro loess dynamic loading system according to claim 1, characterized in that: A base (104) is provided in the main box (101), a straightening sleeve (104a) is provided on the base (104), a linear shaft (104b) is provided in the straightening sleeve (104a), the inner diameter of the straightening sleeve is the same as the outer diameter of the linear shaft (104b), a displacement plate (105) is provided in the main box (101), and the lever (204) contacts the displacement plate (105) after moving.

5. The micro loess dynamic loading system according to claim 4, characterized in that: The straightening sleeve (104a) is provided with a sample sleeve inside. The base (104) is a hollow cylindrical structure. The straightening sleeve (104a) is located inside the base (104). Its maximum outer diameter is the same as the inner diameter of the base (104). The sample sleeve is fixed by the straightening sleeve (104a). The straightening sleeve (104a) is provided with a hollow cylindrical structure inside. The inner diameter of the straightening sleeve (104a) is the same as the outer diameter of the sample sleeve.

6. The micro loess dynamic loading system according to claim 5, characterized in that: The pressure head (106) is located above the sample, and a linear shaft (104b) is located above the pressure head (106). The pressure head (106) is fixed on the linear shaft (104b) and the straightening sleeve is tightly attached thereto.

7. The micro loess dynamic loading system according to claim 1 or 6, characterized in that: A guide rail (207a) is provided on the inner surface of the main box body (101), a slider (207b) is provided on the guide rail (207a), a fixed pulley (207c) is provided between the two guide rails (207a), a steel wire (207d) is provided on the fixed pulley (207c), and two ends of the steel wire (207d) are respectively connected to the sliders (207b) on the two guide rails (207a).

8. The micro loess dynamic loading system according to claim 1, characterized in that: The measuring component (208) comprises a laser displacement sensor (208a) arranged in the main box (101); the laser displacement sensor (208a) detects displacement changes, collects data information and outputs it through upper computer software; and an adjustment component (300) is arranged on the laser displacement sensor (208a).

9. The micro loess dynamic loading system according to claim 8, characterized in that: The adjustment assembly (300) comprises a mounting block (301) arranged in a main housing (101), a slot (302) provided in the mounting block (301), a first movable plate (303) and a second movable plate (304) arranged in the slot (302), the first movable plate (303) being provided with a first latching tooth (305), the second movable plate (304) being provided with a second latching tooth (306), the second movable plate (304) being located below the first movable plate (303), and a latching member (307) being provided on a side of the second movable plate (304) close to the first movable plate (303), the latching member (307) being engaged with the first latching tooth (305).

10. The micro loess dynamic loading system according to claim 9, characterized in that: The laser displacement sensor is provided with a connecting block (308), and a clamping piece (307) is also provided on the connecting block (308), and the clamping piece (307) cooperates with the second clamping tooth (306); baffles (309) are provided on the side walls of the first movable plate (303) and the second movable plate (304); a connecting frame rod (309a) is provided on the mounting block (301); the lower end of the connecting frame rod (309a) is hinged to the mounting block (301); four connecting frame rods (309a) are provided, and are arranged opposite to each other in pairs; the ends of two adjacent connecting frame rods (309a) are provided with driving cylinders (309b); a sleeve (309c) is provided on the output shaft of the driving cylinder (309b), and the sleeve (309c) is connected to the connecting block (308).

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