Piezoelectric detection device for engineering soil consolidation experiment

Abstract

The utility model relates to the technical field of soil parameter testing, in particular to a piezoelectric detection device for an engineering soil consolidation experiment, which comprises a base, a piezoelectric detection mechanism, a consolidation mechanism, a lifting mechanism and a cleaning mechanism, the piezoelectric detection mechanism comprises a horizontal moving platform and a piezoelectric detection equipment body; the consolidation mechanism comprises a hoisting plate, a pressurization structure, a consolidation cylinder and four first connecting arm assemblies, the hoisting plate is arranged at the upper end of the base in parallel, the pressurization structure comprises a downward pressing driver, the downward pressing driver is installed on the hoisting plate, a hoisting support, a connecting shaft and a pressurization column are sequentially arranged at the lower end of the downward pressing driver, and the consolidation cylinder is arranged at the lower end of the pressurization column; the lifting mechanism is arranged at the upper end of the hoisting plate; the cleaning mechanism is arranged on the hoisting bracket; according to the utility model, the piezoelectric detection mechanism, the fixing mechanism, the lifting mechanism and the cleaning mechanism are arranged, so that synchronous sample unloading and cleaning of the consolidation cylinder are realized, and the use efficiency of the consolidation cylinder is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of soil parameter testing technology, specifically to a piezoelectric detection device for engineering soil consolidation experiments. Background Technology

[0002] In engineering geology and civil engineering, in-depth research on the consolidation characteristics of soil is crucial. Consolidation tests aim to obtain the relationship between the change in soil volume and the duration of the external force under a certain magnitude. The piezoelectric effect is a physical phenomenon in which certain crystalline or ceramic materials generate uneven charge distribution when subjected to external pressure or deformation, thus producing an electric field and voltage signal. This effect allows piezoelectric materials to generate electrical signals under mechanical stress, providing a new approach to measuring the mechanical properties of soil. Currently, testing equipment struggles to clean the consolidated soil after the soil sample consolidation test structure tree.

[0003] Chinese Patent Publication No. CN209231113U discloses a piezoelectric soil consolidation test device. During soil testing, a drive cylinder is activated, causing a telescopic rod to extend downwards, pushing a pressure plate downwards along a guide column and compressing the upper buffer spring. This, in turn, causes a sliding plate to slide downwards and the lower buffer spring to compress downwards until the pressure column enters the sample slot of the consolidation cylinder and compresses the soil sample. The piezoelectric slot is engaged with the piezoelectric sensor, applying pressure to the sensor. At this time, the piezoelectric sensor detects the compressive force on the soil sample. Within the pressure chamber formed by the consolidation cylinder, the pressure column, and the sample holder, the soil sample cannot scatter or break down, ensuring the integrity of the soil sample. When cleaning the soil sample inside the consolidation cylinder, the consolidation cylinder is unscrewed and removed. Applying force from one end allows the soil sample in the sample slot to be pushed out from the other end. The through-type consolidation cylinder facilitates the cleaning of the soil sample.

[0004] Although the above method removes the consolidation cylinder from the testing device for cleaning, the consolidation cylinder will vibrate during the disassembly process. The vibration is transmitted to the soil sample inside, causing some soil sample to fall onto the sample mounting base or other places. This means that not only the inside of the consolidation cylinder needs to be cleaned, but other places also need to be cleaned. If the sample mounting base is not cleaned properly, the consolidation cylinder may not be able to be accurately placed into the sample mounting base, resulting in a longer sample preparation process for the next time. Utility Model Content

[0005] To address the aforementioned problems, a piezoelectric detection device for engineering soil consolidation experiments is provided. This invention includes a piezoelectric detection mechanism, a fixing mechanism, a lifting mechanism, and a cleaning mechanism, thereby achieving simultaneous sample unloading and cleaning of the consolidation cylinder and effectively improving the utilization efficiency of the consolidation cylinder.

[0006] To address the problems of existing technologies, this utility model provides a piezoelectric detection device for engineering soil consolidation experiments, comprising a base, a piezoelectric detection mechanism, a consolidation mechanism, a lifting mechanism, and a cleaning mechanism. The base is horizontally positioned, with a sample unloading port on one side of its surface near the end. The piezoelectric detection mechanism includes a horizontal moving platform and a piezoelectric detection device body, with the horizontal moving platform mounted on the base and the piezoelectric detection device body mounted on the horizontal moving platform. The consolidation mechanism includes a lifting plate, a pressure structure, a consolidation cylinder, and four first connecting arm assemblies. The lifting plate is parallel to the upper end of the base. The pressure structure includes a downward pressure driver mounted on the lifting plate. From top to bottom, the lower end of the downward pressure driver is sequentially provided with a lifting bracket, a connecting shaft, and a pressure column. The consolidation cylinder is located at the lower end of the pressure column. The four first connecting arm assemblies are respectively located at the four corners of the consolidation cylinder, with both ends of the first connecting arm assemblies connected to the lifting plate and the consolidation cylinder, respectively. The lifting mechanism is located at the upper end of the lifting plate and connected to the lifting plate. The cleaning mechanism is located on the lifting bracket and at the upper end of the pressure column.

[0007] Preferably, the cleaning mechanism includes a connecting sleeve, a mounting ring, several cleaning structures, and a rotary drive structure; the connecting sleeve is sleeved on the connecting shaft, and the connecting sleeve and the connecting shaft are connected by a bearing; the mounting ring is sleeved on one end of the connecting sleeve, and the mounting ring is fixedly connected to the connecting sleeve; several cleaning structures are evenly distributed around the mounting ring, and each cleaning structure includes a cleaning brush, which is connected to the mounting ring; the rotary drive structure is located on one side of the connecting sleeve, and the rotary drive structure is driven by the connecting sleeve.

[0008] Preferably, the cleaning structure further includes a second connecting arm assembly, which includes a second telescopic column and a third spring; the two ends of the second telescopic column are respectively connected to the mounting ring and the cleaning brush; the third spring is sleeved on the second telescopic column, and the two ends of the third spring are respectively connected to the two ends of the second telescopic column.

[0009] Preferably, the hoisting bracket is fitted with an annular rubber ring, the outer diameter of which is larger than the inner diameter of the consolidation cylinder.

[0010] Preferably, the consolidation mechanism further includes four closing structures, which are respectively disposed on the four side walls of the consolidation cylinder. Each of the four side walls of the consolidation cylinder has an installation groove for accommodating the closing structure. The closing structure includes a closing plate, a closing reset structure, and a driving plate. The closing plate is disposed at the lower end of the consolidation cylinder, and the middle part of the closing plate is hinged to the consolidation cylinder. The closing reset structure is disposed in the installation groove. The driving plate is disposed between the closing plate and the closing reset structure, and one end of the driving plate is hinged to one end of the closing plate.

[0011] Preferably, the lifting mechanism includes a lifting plate and two lifting drive structures; the middle part of the lifting plate is connected to the hoisting plate; the two lifting drive structures are respectively arranged at both ends of the lifting plate and are connected to the lifting plate.

[0012] The advantages of this utility model compared to the prior art are:

[0013] This invention comprises a piezoelectric detection mechanism, a fixing mechanism, a lifting mechanism, and a cleaning mechanism. The lifting mechanism drives the lower end of the consolidation cylinder to make close contact with the piezoelectric detection device body, ensuring complete sealing during the test. The pressurizing structure applies uniform and stable pressure to the soil sample inside the consolidation cylinder, enabling the piezoelectric detection mechanism to accurately detect soil consolidation data. After the test, the horizontal moving platform drives the piezoelectric detection device body to one side, exposing the lower end of the consolidation cylinder and the sample discharge port. The cleaning mechanism continues to follow the movement trajectory of the pressurizing structure, extending into the consolidation cylinder. After the pressurizing structure pushes out the soil sample from the consolidation cylinder, the cleaning mechanism immediately thoroughly cleans the inside of the consolidation cylinder to ensure no residue remains. This achieves simultaneous sample discharge and cleaning of the consolidation cylinder, effectively improving its utilization efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional view of a piezoelectric detection device for engineering soil consolidation experiments according to this utility model.

[0015] Figure 2 This is a front view of a piezoelectric detection device for engineering soil consolidation experiments according to this utility model.

[0016] Figure 3 yes Figure 2 A three-dimensional sectional view at point AA.

[0017] Figure 4 This is a perspective view of the hoisting bracket, connecting shaft, consolidation cylinder, and cleaning mechanism in a piezoelectric testing device for engineering soil consolidation experiments according to this utility model.

[0018] Figure 5 This is a perspective view of the connecting shaft and cleaning mechanism in a piezoelectric testing device for engineering soil consolidation experiments according to this utility model.

[0019] Figure 6 This is a three-dimensional view of the hoisting bracket, annular rubber ring, and consolidation cylinder in a piezoelectric testing device for engineering soil consolidation experiments according to this utility model.

[0020] Figure 7 This is a three-dimensional view of the consolidation cylinder and closed structure in a piezoelectric detection device for engineering soil consolidation experiments according to this utility model.

[0021] Figure 8This is a three-dimensional view of the consolidation mechanism and lifting mechanism in a piezoelectric detection device for engineering soil consolidation experiments according to this utility model.

[0022] The diagram is labeled as follows: 1. Base; 11. Sample unloading port; 2. Piezoelectric detection mechanism; 21. Horizontal moving platform; 22. Piezoelectric detection equipment body; 3. Consolidation mechanism; 31. Lifting plate; 32. Pressurization structure; 321. Downward pressure driver; 322. Lifting bracket; 3221. Annular rubber ring; 323. Connecting shaft; 324. Pressurization column; 33. Consolidation cylinder; 34. First connecting arm assembly; 341. First telescopic column; 342. First spring; 35. Closing structure; 351. Closing plate; 352. Closing reset structure; 3521. First guide... 3522, Column; 3523, Slider; 3524, Second Spring; 3525, Connecting Rod; 353, Drive Plate; 4, Lifting Mechanism; 41, Lifting Plate; 42, Lifting Drive Structure; 421, Vertical Plate; 422, Second Guide Column; 423, Lifting Driver; 5, Cleaning Mechanism; 51, Connecting Sleeve; 52, Mounting Ring; 53, Cleaning Structure; 531, Cleaning Brush; 532, Second Connecting Arm Assembly; 5321, Second Telescopic Column; 5322, Third Spring; 54, Rotary Drive Structure; 541, External Gear Ring; 542, Gear; 543, Rotary Driver. Detailed Implementation

[0023] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0024] Reference Figures 1 to 8As shown: A piezoelectric detection device for engineering soil consolidation experiments includes a base 1, a piezoelectric detection mechanism 2, a consolidation mechanism 3, a lifting mechanism 4, and a cleaning mechanism 5. The base 1 is horizontally arranged, and a sample discharge port 11 is opened on the side of the surface of the base 1 near the end. The piezoelectric detection mechanism 2 includes a horizontal moving platform 21 and a piezoelectric detection device body 22. The horizontal moving platform 21 is set on the base 1, and the piezoelectric detection device body 22 is installed on the horizontal moving platform 21. The consolidation mechanism 3 is set above the sample discharge port 11. The consolidation mechanism 3 includes a lifting plate 31, a pressurizing structure 32, a consolidation cylinder 33, and four first connecting arm assemblies 34. The lifting plate 31 is arranged parallel to the upper end of the base 1. The pressurizing structure 32 includes a downward pressure driver 321, which is installed on the lifting plate 31. The lower end of the downward pressure driver 321... The hoisting bracket 322, connecting shaft 323, and pressure column 324 are arranged sequentially from top to bottom. The consolidation cylinder 33 is located at the lower end of the pressure column 324. Four first connecting arm assemblies 34 are respectively located at the four corners of the consolidation cylinder 33. The two ends of the first connecting arm assemblies 34 are respectively connected to the hoisting plate 31 and the consolidation cylinder 33. The first connecting arm assembly 34 includes a first telescopic column 341 and a first spring 342. The two ends of the first telescopic column 341 are respectively connected to the hoisting plate 31 and the consolidation cylinder 33. The first spring 342 is sleeved on the first telescopic column 341, and the two ends of the first spring 342 are respectively connected to the two ends of the first telescopic column 341. The lifting mechanism 4 is located at the upper end of the hoisting plate 31 and is connected to the hoisting plate 31. The cleaning mechanism 5 is located on the hoisting bracket 322 and is located at the upper end of the pressure column 324.

[0025] In the initial state, the piezoelectric detection device body 22 is placed between the sample discharge port 11 and the consolidation cylinder 33. The lifting mechanism 4 is activated, driving the lower end of the consolidation cylinder 33 to abut against the piezoelectric detection device body 22, forming a closed state. The soil sample is then placed into the consolidation cylinder 33, ensuring it is evenly spread. Next, the pressure structure 32 operates, and the downward pressure driver 321 applies a thrust towards the interior of the consolidation cylinder 33. This thrust is transmitted to the pressure column 324 via the lifting bracket 322 and connecting shaft 323. The pressure column 324 applies compressive force to the soil sample inside the consolidation cylinder 33. After the soil sample is compressed, the first connecting arm assembly 34 extends, allowing the compressive force on the soil to be transmitted to the piezoelectric detection device body 22. After the soil sample consolidation test is completed, the horizontal moving platform 21 is activated. The piezoelectric testing device body 22 is moved to one side of the base 1, exposing the sample discharge port 11 on the base 1. At this time, the pressure drive 321 continues to apply thrust toward the interior of the consolidation cylinder 33. The hoisting bracket 322, connecting shaft 323, and pressure column 324 move synchronously toward the interior of the consolidation cylinder 33. Under the action of the pressure column 324, the soil test sample inside the consolidation cylinder 33 is pushed out and falls from the sample discharge port 11. At the same time, the connecting shaft 323 drives the cleaning mechanism 5 to extend into the consolidation cylinder 33 to clean the interior of the consolidation cylinder 33. After cleaning, the pressure structure 32 and the lifting mechanism 4 are restarted, driving each mechanism to reset to the initial state. Through the above process, the synchronous sample discharge and cleaning of the consolidation cylinder 33 are achieved, effectively improving the utilization efficiency of the consolidation cylinder 33.

[0026] Reference Figure 3 , Figure 4 and Figure 5 As shown: The cleaning mechanism 5 includes a connecting sleeve 51, a mounting ring 52, several cleaning structures 53, and a rotary drive structure 54; the connecting sleeve 51 is sleeved on the connecting shaft 323, and the connecting sleeve 51 and the connecting shaft 323 are connected by a bearing; the mounting ring 52 is sleeved on one end of the connecting sleeve 51, and the mounting ring 52 is fixedly connected to the connecting sleeve 51; several cleaning structures 53 are evenly distributed around the mounting ring 52, and each cleaning structure 53 includes a cleaning brush 531, which is connected to the mounting ring 52; the rotary drive structure 54 is located on one side of the connecting sleeve 51, and is drively connected to the connecting sleeve 51; the rotary drive structure 54 includes an external gear ring 541, a gear 542, and a rotary driver 543; the external gear ring 541 is sleeved on the other end of the connecting sleeve 51, the gear 542 meshes with the external gear ring 541, and the rotary driver 543 is located on one side of the gear 542, and the output shaft of the rotary driver 543 is connected to the gear 542.

[0027] After the soil consolidation experiment is completed, the cleaning mechanism 5 starts working. Driven by the connecting shaft 323, the cleaning mechanism 5 moves from top to bottom toward the interior of the consolidation cylinder 33. At this time, the rotary drive structure 54 operates, and the output shaft of the rotary driver 543 drives the gear 542 to start rotating. The rotation of the gear 542 drives the outer gear ring 541 to rotate synchronously. The outer gear ring 541 rotates around the axis of the connecting shaft 323 through the connecting sleeve 51. The rotation of the connecting sleeve 51 drives the synchronous rotation of the mounting ring 52, which in turn causes several cleaning brushes 531 around the mounting ring 52 to rotate around the axis of the connecting shaft 323. While the cleaning brushes 531 are rotating, they also move toward the interior of the consolidation cylinder 33 along with the movement of the connecting shaft 323. Under the dual action of rotation and movement, it is ensured that the cleaning brushes 531 can thoroughly and evenly clean the inner wall of the consolidation cylinder 33.

[0028] Reference Figure 3 , Figure 4 and Figure 5 As shown: The cleaning structure 53 also includes a second connecting arm assembly 532, which includes a second telescopic column 5321 and a third spring 5322; the two ends of the second telescopic column 5321 are respectively connected to the mounting ring 52 and the cleaning brush 531; the third spring 5322 is sleeved on the second telescopic column 5321, and the two ends of the third spring 5322 are respectively connected to the two ends of the second telescopic column 5321.

[0029] The second telescopic column 5321 and the third spring 5322 form an elastic support system. When the axes of the connecting sleeves 51 of the several cleaning structures 53 begin to rotate, the cleaning brush 531 is subjected to centrifugal force. This centrifugal force acts on the second connecting arm assembly 532, which extends along its length. However, the cleaning brush 531 is physically restricted by the inner wall of the consolidation cylinder 33 and cannot move along the straight line of the second connecting arm assembly 532, resulting in the second connecting arm assembly 532 not actually being able to extend. During this process, the inner wall of the consolidation cylinder 33 becomes the main part bearing the centrifugal force, ensuring that the cleaning brush 531 can fit tightly against the inner wall of the consolidation cylinder 33, so that the cleaning structure 53 can effectively clean those soil samples that are more tightly adhered, thereby significantly improving the cleaning efficiency and effect.

[0030] Reference Figure 3 and Figure 6 As shown: The hoisting bracket 322 is fitted with an annular rubber ring 3221, and the outer diameter of the annular rubber ring 3221 is larger than the inner diameter of the consolidation cylinder 33.

[0031] When the cleaning brush 531 performs its cleaning task and removes most of the soil sample from the inner wall of the consolidation cylinder 33, some fine soil sample particles may be adsorbed onto the inner wall of the consolidation cylinder 33 due to electrostatic effect. Therefore, an annular rubber ring 3221 with a diameter larger than the inner diameter of the consolidation cylinder 33 is provided. The annular rubber ring 3221 enters the consolidation cylinder 33 immediately after the cleaning brush 531, and its outer surface contacts the inner wall of the consolidation cylinder 33. As the lifting bracket 322 and the attached cleaning brush 531 and annular rubber ring 3221 move together along the inner wall of the consolidation cylinder 33, the annular rubber ring 3221 uses its elasticity and friction to effectively scrape off the fine soil sample particles that are adsorbed onto the inner wall of the consolidation cylinder 33 by electrostatic effect, thereby improving the overall cleaning quality.

[0032] Reference Figure 3 and Figure 7 As shown: The consolidation mechanism 3 also includes a closing structure 35. There are four closing structures 35, each disposed on one of the four side walls of the consolidation cylinder 33. Each of the four side walls of the consolidation cylinder 33 has a mounting groove for accommodating the closing structure 35. Each closing structure 35 includes a closing plate 351, a closing reset structure 352, and a driving plate 353. The closing plate 351 is disposed at the lower end of the consolidation cylinder 33, and its middle portion is hinged to the consolidation cylinder 33. The closing reset structure 352 is disposed within the mounting groove and includes two first guide posts 3521, two sliders 3522, two second springs 3523, and a connecting... The connecting rod 3524 has two first guide posts 3521 arranged in parallel within the mounting groove, two sliders 3522 slidably mounted on the two first guide posts 3521, and two second springs 3523 respectively sleeved on the first guide posts 3521. The two ends of the second springs 3523 abut against the ends of the first guide posts 3521 and the sliders 3522, respectively. The two ends of the connecting rod 3524 are connected to the two sliders 3522, respectively. The driving plate 353 is disposed between the closing plate 351 and the closing reset structure 352. One end of the driving plate 353 is hinged to one end of the closing plate 351, and the other end of the driving plate 353 is connected to the connecting rod 3524.

[0033] When the piezoelectric detection device body 22 is connected to the lower opening of the consolidation cylinder 33 to form a closed state, moving the piezoelectric detection device body 22 by the horizontal moving platform 21 may cause soil sample residue. Therefore, four closing structures 35 are set at the lower end of the consolidation cylinder 33. Under static conditions, the four closing plates 351 maintain a horizontal state together, tightly sealing the lower end of the consolidation cylinder 33, ensuring that the soil sample is completely placed inside the consolidation cylinder 33. When the lifting mechanism 4 drives the consolidation cylinder 33 to move towards the unloading port 11, one end of the closing plate 351 touches the edge of the unloading port 11 and is blocked, and then rotates around its hinge point with the consolidation cylinder 33. At this time, one end of the closing plate 351 tilts upward and the other end rotates downward, realizing the consolidation. As the lower end of the consolidation cylinder 33 opens, the rotation of the closing plate 351 is transmitted to the slider 3522 via the drive plate 353 and the connecting rod 3524. This pushes the slider 3522 to move along the first guide post 3521 and compress the second spring 3523. After the sample is unloaded, the lifting mechanism 4 resets the consolidation cylinder 33. At this time, the second spring 3523 releases its stored energy, pushing the slider 3522 to move in the opposite direction. Through the action of the connecting rod 3524 and the drive plate 353, the closing plate 351 rotates again around its hinge point with the consolidation cylinder 33 to a horizontal state, tightly sealing the lower end of the consolidation cylinder 33. This effectively prevents the soil sample from falling onto the surface of the piezoelectric detection device body 22, keeping its surface clean.

[0034] Reference Figure 3 and Figure 8 As shown: The lifting mechanism 4 includes a lifting plate 41 and two lifting drive structures 42; the middle part of the lifting plate 41 is connected to the hoisting plate 31; the two lifting drive structures 42 are respectively arranged at both ends of the lifting plate 41 and are connected to the lifting plate 41. The lifting drive structure 42 includes a vertical plate 421, two second guide columns 422 and a lifting driver 423. The lower end of the vertical plate 421 is connected to the lifting plate 41. The two second guide columns 422 are arranged parallel inside the vertical plate 421. The end of the lifting plate 41 is slidably connected to the two second guide columns 422. The lifting driver 423 is arranged between the two second guide columns 422. The lifting driver 423 is installed on the vertical plate 421 and the output end of the lifting driver 423 is connected to the lifting plate 41.

[0035] When the lifting mechanism 4 drives the solidified cylinder 33 to move toward the piezoelectric testing equipment body 22, the two lifting drive structures 42 work simultaneously, and the two lifting drivers 423 in the two lifting drive structures 42 work simultaneously, applying a downward driving force to both ends of the lifting plate 41. Since both ends of the lifting plate 41 are guided and restricted by the second guide column 422, the stability of the lifting plate 41 during the movement is ensured. Therefore, the lifting plate 41 can smoothly drive the hoisting plate 31 and the solidified cylinder 33 to move simultaneously, so that the lower end of the solidified cylinder 33 can smoothly move toward the piezoelectric testing equipment body 22, ensuring that the lower end of the solidified cylinder 33 can fully contact the piezoelectric testing equipment body 22, and maintaining the maximum contact area each time it contacts, thereby achieving effective control of the contact area between the solidified cylinder 33 and the piezoelectric testing equipment body 22.

[0036] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A piezoelectric detection device for engineering soil consolidation experiments, characterized in that, It includes a base (1), a piezoelectric detection mechanism (2), a consolidation mechanism (3), a lifting mechanism (4), and a cleaning mechanism (5); The base (1) is set horizontally, and a sample unloading port (11) is opened on the side of the surface of the base (1) near the end; The piezoelectric testing mechanism (2) includes a horizontal moving platform (21) and a piezoelectric testing equipment body (22). The horizontal moving platform (21) is set on the base (1), and the piezoelectric testing equipment body (22) is installed on the horizontal moving platform (21). The consolidation mechanism (3) includes a lifting plate (31), a pressure structure (32), a consolidation cylinder (33), and four first connecting arm assemblies (34). The lifting plate (31) is arranged parallel to the upper end of the base (1). The pressure structure (32) includes a downward driver (321). The downward driver (321) is installed on the lifting plate (31). The lower end of the downward driver (321) is arranged from top to bottom as a lifting bracket (322), a connecting shaft (323), and a pressure column (324). The consolidation cylinder (33) is arranged at the lower end of the pressure column (324). The four first connecting arm assemblies (34) are respectively arranged at the four corners of the consolidation cylinder (33). The two ends of the first connecting arm assemblies (34) are respectively connected to the lifting plate (31) and the consolidation cylinder (33). The lifting mechanism (4) is set on the upper end of the hoisting plate (31), and the lifting mechanism (4) is connected to the hoisting plate (31); The cleaning mechanism (5) is mounted on the hoisting bracket (322) and is located at the upper end of the pressure column (324).

2. The piezoelectric detection device for engineering soil consolidation experiments according to claim 1, characterized in that, The cleaning mechanism (5) includes a connecting sleeve (51), a mounting ring (52), several cleaning structures (53) and a rotary drive structure (54); The connecting sleeve (51) is sleeved on the connecting shaft (323), and the connecting sleeve (51) and the connecting shaft (323) are connected by a bearing; The mounting ring (52) is sleeved on one end of the connecting sleeve (51), and the mounting ring (52) is fixedly connected to the connecting sleeve (51); Several cleaning structures (53) are evenly distributed around the mounting ring (52). Each cleaning structure (53) includes a cleaning brush (531) connected to the mounting ring (52). The rotary drive structure (54) is disposed on one side of the connecting sleeve (51), and the rotary drive structure (54) is connected to the connecting sleeve (51) in a transmission manner.

3. The piezoelectric detection device for engineering soil consolidation experiments according to claim 2, characterized in that, The cleaning structure (53) also includes a second connecting arm assembly (532), which includes a second telescopic column (5321) and a third spring (5322); The two ends of the second telescopic column (5321) are connected to the mounting ring (52) and the cleaning brush (531) respectively; The third spring (5322) is sleeved on the second telescopic column (5321), and the two ends of the third spring (5322) are respectively connected to the two ends of the second telescopic column (5321).

4. The piezoelectric detection device for engineering soil consolidation experiments according to claim 1, characterized in that, The hoisting bracket (322) is fitted with an annular rubber ring (3221), the outer diameter of which is larger than the inner diameter of the consolidation cylinder (33).

5. The piezoelectric detection device for engineering soil consolidation experiments according to claim 1, characterized in that, The consolidation mechanism (3) also includes a closing structure (35), which has four closing structures (35). The closing structures (35) are respectively set on the four side walls of the consolidation cylinder (33). The four side walls of the consolidation cylinder (33) are provided with mounting grooves to accommodate the closing structures (35). The closing structure (35) includes a closing plate (351), a closing reset structure (352), and a drive plate (353). The closing plate (351) is located at the lower end of the consolidation cylinder (33), and the middle part of the closing plate (351) is hinged to the consolidation cylinder (33); The closed reset structure (352) is installed in the mounting slot; The drive plate (353) is disposed between the closing plate (351) and the closing reset structure (352), and one end of the drive plate (353) is hinged to one end of the closing plate (351).

6. The piezoelectric detection device for engineering soil consolidation experiments according to claim 1, characterized in that, The lifting mechanism (4) includes a lifting plate (41) and two lifting drive structures (42); The middle part of the lifting plate (41) is connected to the hoisting plate (31); Two lifting drive structures (42) are respectively set at both ends of the lifting plate (41), and the lifting drive structures (42) are connected to the lifting plate (41).

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