Double-layer shielding type ultra-deep stratum concrete flow state detection device and method

Abstract

The application discloses a double-layer shielding type super-deep stratum concrete flow state detection device and method, belongs to the technical field of water conservancy and hydropower foundation construction, and comprises a box body, a pressure sensor and a driving mechanism are arranged in the box body, and further comprises a detection mechanism, the detection mechanism comprises an outer sleeve, an inner push rod, a driving assembly and a detection assembly; the outer sleeve is axially connected with the pressure sensor, the inner push rod and the driving assembly are arranged in the outer sleeve, a detection cavity is surrounded between the inner push rod and the outer sleeve, and the detection assembly is arranged at one end of the inner push rod close to the detection cavity. The double-layer shielding type nested structure formed by the outer sleeve and the inner push rod makes the stress signal collected by the detection assembly only be the pure axial resistance exerted by the concrete to be detected on the end face of the inner push rod, solves the defects of the existing detection device, such as detection data distortion and insufficient precision caused by resistance superposition, eliminates the detection error caused by resistance superposition, and guarantees the reliability and accuracy of the detection data.

Description

Technical Field

[0001] This invention relates to the field of water conservancy and hydropower foundation construction technology, and more particularly to the field of stratum seepage prevention walls, stratum concrete structure construction devices and methods, specifically to a double-layer shielded ultra-deep stratum concrete flow state detection device and method. Background Technology

[0002] In the construction of ground-level anti-seepage walls and ultra-deep concrete structures for water conservancy and hydropower foundations, accurate detection of the concrete setting state is a crucial step in controlling construction quality and subsequent procedures. Current technologies for detecting the setting state of ultra-deep concrete often rely on ground-based equivalent model simulations or empirical estimations based on the initial setting time corresponding to the concrete grade. Both methods have significant technical drawbacks: ground-based equivalent model tests cannot accurately reproduce the complex real-world conditions of ultra-deep strata, such as high pressure, temperature fluctuations, and groundwater inflow. Because the model environment differs significantly from the in-situ stratum conditions, the actual concrete setting state deviates considerably from the model test results, and the detection data cannot accurately reflect the actual pile quality of the underground concrete. Furthermore, empirical estimation methods based on initial setting time fail to consider factors such as changes in concrete concentration and fluctuations in setting rate caused by disturbances in the ultra-deep environment, easily leading to errors in judging the setting state. If subsequent construction is guided by these errors, it can easily result in poor anti-seepage wall formation, insufficient structural density, and substandard concrete strength, among other engineering quality hazards.

[0003] To overcome the shortcomings of model simulation and empirical prediction, existing technologies have developed axial pushing detection devices that directly insert probes into the interior of ultra-deep concrete strata. Specifically, such as... Figure 1 and Figure 2 As shown, existing detection devices typically use a drive mechanism to axially push a probe to compress concrete, and determine the concrete's solidification state based on the axial force collected by a pressure sensor. This type of device achieves in-situ detection of the concrete's solidification state, improving real-time performance to some extent. However, this type of device still suffers from a core accuracy defect: because its probe is usually a single unit, its outer circumference comes into direct contact with the concrete after insertion. The high viscosity of the concrete causes significant frictional resistance on the probe's outer wall. This lateral frictional resistance is superimposed on the axial resistance of the concrete against the probe tip, resulting in the pressure sensor collecting composite resistance data rather than the pure axial resistance that reflects the concrete's solidification state. This easily leads to data distortion and makes it difficult to accurately reflect the actual degree of concrete solidification. Furthermore, the high-pressure environment of ultra-deep strata further increases the contact pressure between the probe and the concrete, amplifying the interference effect of the lateral frictional resistance.

[0004] Furthermore, existing axial pushing testing devices all adopt a single testing mode, which can only collect force data for a single axial pushing. They lack a secondary verification mechanism for the hardening grade of solid concrete, which can easily lead to construction personnel being unable to accurately control the actual setting process of concrete based on the test data. If construction personnel rely on this single test result to guide the connection of subsequent construction procedures of the anti-seepage wall, they may easily make mistakes in judging the setting state, resulting in improper selection of the construction timing, which in turn leads to subsequent engineering quality problems such as insufficient compaction of the anti-seepage wall and uneven structural strength.

[0005] Currently, there is no effective technical means to solve the detection error problem caused by the superposition of side friction and axial resistance of the probe. It is impossible to eliminate the interference of side friction on the axial detection of concrete from the root. Therefore, there is an urgent need for a device that can effectively isolate side friction, realize accurate in-situ detection of the solidification state of ultra-deep strata concrete, and perform secondary verification of solid concrete, so as to meet the quality control requirements of ultra-deep strata concrete construction in water conservancy and hydropower. Summary of the Invention

[0006] The main objective of this invention is to overcome the deficiencies of the existing technology and provide a double-layer shielded ultra-deep concrete flow state detection device and method that can effectively shield side friction resistance, eliminate detection errors caused by resistance superposition, accurately collect the pure axial resistance of concrete, realize in-situ accurate detection of ultra-deep concrete flow state, and perform secondary verification of solid concrete.

[0007] To achieve the above objectives, the present invention provides a double-layer shielded ultra-deep concrete flow state detection device, comprising a box disposed within a connector pipe, wherein a pressure sensor for collecting axial pressure and a drive mechanism connected to the pressure sensor and providing axial driving force are disposed within the box, characterized in that it further comprises a detection mechanism, wherein the detection mechanism comprises an outer sleeve, an inner push rod, a drive assembly and a detection assembly;

[0008] The outer sleeve is axially connected to the pressure sensor and is driven by the drive mechanism to extend axially out of the housing to contact the concrete. The inner push rod and drive assembly are provided inside the outer sleeve. The outer wall of the inner push rod is slidably sealed to the inner wall of the outer sleeve, and the front end face of the inner push rod and the front end port of the outer sleeve form a detection cavity for concrete to enter. The drive assembly is used to drive the inner push rod to move axially within the outer sleeve so that the front end of the inner push rod squeezes the concrete in the detection cavity. The detection assembly is provided at one end of the inner push rod near the detection cavity, and the detection assembly is used to detect the force signal when the inner push rod moves axially.

[0009] Preferably, the inner push rod near the detection cavity is further provided with a push block for blocking the detection component, and the outer wall of the push block is in sliding sealing fit with the inner wall of the outer sleeve.

[0010] Preferably, the inner wall of the outer sleeve is provided with a plurality of pressure relief holes that communicate with the inner cavity of the box along its circumference, and the plurality of pressure relief holes are all located between the push block and the drive assembly.

[0011] Preferably, a cone head is detachably mounted on the end face of the pusher block facing the detection cavity.

[0012] Preferably, a plurality of guide holes are provided on the inner wall of the outer sleeve corresponding to the position of the detection cavity.

[0013] Preferably, the end face of the push block facing the detection cavity is further provided with a plurality of guide grooves, the plurality of guide grooves extending from the cone head to the outer wall of the push block, and the plurality of guide grooves are used to guide the concrete in the detection cavity to the guide hole.

[0014] Preferably, two annular grooves are spaced apart along the axial direction on the outer wall of the pusher block. A dustproof ring is provided in the annular groove closer to the detection chamber. The lip of the dustproof ring faces the detection chamber and is used to scrape off mud and sand. A sealing ring is provided in the other annular groove. The sealing ring is used to seal the high-pressure slurry.

[0015] Preferably, the drive assembly includes a hydraulic pump, a water tank, a cylinder, a piston, and an end cap. The cylinder is disposed inside the outer sleeve, and the end cap is disposed at one end of the cylinder. One end of the inner push rod passes through the end cap and extends into the cylinder, and the end of the inner push rod located inside the cylinder is connected to the piston, which slides and seals with the inner wall of the cylinder. An inlet and outlet communicating with the hydraulic pump are provided on the side wall of the cylinder, and the hydraulic pump is connected to the water tank through a delivery pipe.

[0016] Preferably, the drive assembly further includes an elastic element, which is sleeved on the inner push rod. The two ends of the elastic element are respectively connected to the end cap and the piston, and the end cap and the piston are respectively provided with grooves for the elastic element to extend into.

[0017] A double-layer shielded ultra-deep concrete flow regime detection method, employing the double-layer shielded ultra-deep concrete flow regime detection device as described above, specifically includes the following steps:

[0018] S1. Macroscopic detection step: Control the drive mechanism to drive the outer sleeve to extend out of the box to contact the concrete, and obtain the first axial resistance signal of the outer sleeve through the pressure sensor;

[0019] S2. Initial State Judgment Step: The macroscopic state of the concrete is determined based on the first axial resistance signal. If the first axial resistance signal is greater than the preset solid state threshold, the concrete is determined to be in a solid or hard plastic state. The drive assembly is controlled to drive the inner push rod to move axially until the push block is flush with the front end face of the outer sleeve. The push block squeezes the concrete and obtains the second axial resistance signal through the detection assembly to assist in verifying the solid / hard plastic state level. If the first axial resistance signal is less than the preset solid state threshold, the outer sleeve continues to penetrate deeper, allowing the concrete to enter the detection cavity at the front end of the outer sleeve.

[0020] S3. Microscopic detection steps: When concrete enters the detection chamber, the driving assembly is controlled to drive the inner push rod to move axially. The push block at the front end of the inner push rod squeezes the concrete in the detection chamber, causing the concrete to be discharged outward through the guide hole. At the same time, the second axial resistance signal of the inner push rod is obtained through the detection assembly.

[0021] S4. Flow determination step: Based on the magnitude and trend of the second axial resistance signal, analyze the rheological parameters of the concrete to determine the flow level of the concrete.

[0022] S5. Component Reset Step: After the test is completed, the hydraulic pump is controlled to draw back the driving medium in the cylinder through the infusion pipe. Under the action of the elastic reset force of the elastic element, the piston drives the inner push rod to move in the opposite direction along the axis to the initial position. At the same time, the drive mechanism drives the outer sleeve to retract axially into the box, completing the reset of one test process.

[0023] Beneficial effects:

[0024] 1. The present invention discloses a double-layer shielded ultra-deep stratum concrete flow state detection device. Through a double-layer shielded nested structure composed of an outer sleeve and an inner push rod, it completely avoids the interference of side friction resistance generated by the contact between the outer wall and the concrete in existing integrated detection probes. This ensures that the force signal collected by the detection component is only the pure axial resistance exerted by the concrete under test on the end face of the inner push rod, rather than the composite resistance formed by the superposition of side friction resistance and axial resistance. This fundamentally solves the defects of existing detection devices caused by resistance superposition, such as data distortion and insufficient accuracy. It also eliminates the detection error caused by resistance superposition, ensuring the reliability and accuracy of detection data even under the high pressure environment of ultra-deep strata.

[0025] 2. The present invention provides a double-layer shielded ultra-deep stratum concrete flow state detection device. Through the coordinated use of the drive mechanism and drive components, it can effectively prevent residual materials from solidifying and hardening in the detection chamber, preventing problems such as internal push rod jamming and detection chamber volume deviation during subsequent detection processes. It also ensures the stability and consistency of detection accuracy of the detection device after repeated use. The detection chamber can be self-cleaned without the need for an additional cleaning mechanism, making it suitable for the working environment in ultra-deep stratum construction where manual disassembly and cleaning are difficult to carry out, thus reducing the device maintenance cost during on-site construction.

[0026] 3. The present invention discloses a double-layer shielded ultra-deep concrete flow state detection device. Through a dual-drive, dual-detection design where the drive mechanism and drive components are independent of each other, and the pressure sensor and detection components are independent of each other, it can quickly screen the macroscopic solidification state of concrete through the axial pushing of the outer sleeve, and accurately detect the flow state of concrete through the axial compression of the inner push rod. At the same time, it can also perform secondary verification of solid concrete, thereby assisting construction personnel in determining the hardening grade of concrete. This forms a dual detection system of macroscopic initial judgment by the outer sleeve and precise verification by the inner push rod, effectively avoiding the misjudgment problem caused by single detection data and significantly improving the reliability and accuracy of the detection results.

[0027] 4. The present invention provides a double-layer shielded ultra-deep concrete flow state detection device. Through a dual-drive, dual-detection design where the drive mechanism and drive components are independent of each other, and the pressure sensor and detection components are independent of each other, it can fully adapt to the full solidification cycle detection needs of concrete from dilute flow state, plastic flow state, hard plastic state to completely solid state. Without replacing detection components or adjusting the device structure, it can complete the entire process detection of initial setting time determination, solidification process tracking, and final hardening grade verification after concrete pouring. It can fully meet the quality control needs of the entire construction process of ultra-deep anti-seepage walls in water conservancy and hydropower projects, and has significant engineering practical value.

[0028] 5. Other beneficial effects or advantages of the double-layer shielded ultra-deep concrete flow state detection device of the present invention will be described in detail in the specific embodiments. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a diagram showing the operational status of an axial pushing type detection device in the existing technology during operation.

[0031] Figure 2 This is a force analysis diagram of an axial pushing type testing device in the prior art during operation;

[0032] Figure 3 This is an isometric sectional view of a double-layer shielded ultra-deep concrete flow state detection device in a joint pipe according to an embodiment of the present invention.

[0033] Figure 4 This is a schematic diagram of the structure of a double-layer shielded ultra-deep concrete flow state detection device according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the detection mechanism, pressure sensor, and drive mechanism in a double-layer shielded ultra-deep concrete flow state detection device according to an embodiment of the present invention.

[0035] Figure 6 This is an isometric sectional view of the detection mechanism in a double-layer shielded ultra-deep concrete flow state detection device according to an embodiment of the present invention;

[0036] Figure 7 This is a partial structural schematic diagram of the drive component in a double-layer shielded ultra-deep concrete flow state detection device according to an embodiment of the present invention.

[0037] Figure 8 yes Figure 7 Cross-sectional view at point AA.

[0038] In the diagram: 100-Axial pushing detection device; 200-Pouring pipe; 300-Concrete to be tested; 400-Soil layer; 500-Connector pipe; 1-Box body; 2-Pressure sensor; 3-Drive mechanism; 4-Outer sleeve; 5-Inner push rod; 6-Detection chamber; 7-Push block; 8-Pressure relief hole; 9-Cone; 10-Guide groove; 11-Dustproof ring; 12-Sealing ring; 13-Hydraulic pump; 14-Water tank; 15-Cylinder body; 16-Piston; 17-End cap; 18-Elastic element. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use, is merely for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is merely for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0043] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0044] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] Example 1:

[0046] This invention proposes a double-layer shielded ultra-deep concrete flow state detection device.

[0047] In one embodiment of the present invention, a double-layer shielded ultra-deep stratum concrete flow state detection device includes a box 1 disposed in a joint pipe 500, a pressure sensor 2 for collecting axial pressure and a drive mechanism 3 connected to the pressure sensor 2 and providing axial driving force, and also includes a detection mechanism, which includes an outer sleeve 4, an inner push rod 5, a drive assembly and a detection assembly.

[0048] The outer sleeve 4 is axially connected to the pressure sensor 2 and is driven by the drive mechanism 3 to extend axially out of the housing 1 to contact the concrete. The outer sleeve 4 is provided with an inner push rod 5 and a drive assembly. The outer wall of the inner push rod 5 is slidably sealed with the inner wall of the outer sleeve 4, and the front end face of the inner push rod 5 and the front end port of the outer sleeve 4 form a detection cavity 6 for the concrete to enter. The drive assembly is used to drive the inner push rod 5 to move axially within the outer sleeve 4 so that the front end of the inner push rod 5 squeezes the concrete in the detection cavity 6. A detection assembly is provided at one end of the inner push rod 5 near the detection cavity 6. The detection assembly is used to detect the force signal when the inner push rod 5 moves axially.

[0049] Working Principle: In the detection process of this invention, a double-layer shielded ultra-deep stratum concrete flow state detection device, by axially connecting the outer sleeve 4 to the pressure sensor 2, the outer sleeve 4 can extend axially out of the housing 1 under the drive of the drive mechanism 3 and directly contact the concrete to be tested. At this time, the outer sleeve 4 acts as the outer shielding structure, and its outer wall directly contacts the concrete and bears all the side friction resistance. The inner push rod 5 is coaxially set inside the outer sleeve 4, and its outer wall slides and seals with the inner wall of the outer sleeve 4. Moreover, its outer wall does not directly contact the external concrete throughout the process, thereby completely avoiding the external friction resistance generated by the high viscosity characteristics of concrete on the inner push rod 5. This fundamentally eliminates the problem of the superposition of side friction resistance and axial blocking resistance in existing integrated probes, avoids the distortion of pressure acquisition data due to composite resistance, and also solves the industry pain point of amplifying the interference effect of side friction resistance in ultra-deep stratum high-pressure environment.

[0050] Specifically, such as Figures 3 to 8As shown, in this embodiment, since the box 1 is set inside the connector pipe 500, the connector pipe 500 is a conventional tool in the construction of ultra-deep anti-seepage walls for water conservancy and hydropower. It is a closed rigid tubular structure, which can shield and protect the box 1 through the connector pipe 500, preventing high-pressure mud, sand particles, groundwater, uncured concrete slurry and other substances in the ultra-deep strata from corroding the box 1 and its internal components, thus ensuring the normal operation of the detection device. At the same time, since the box 1 is equipped with a pressure sensor 2 for collecting axial pressure and a drive mechanism 3 connected to the pressure sensor 2 and providing axial driving force, and the outer sleeve 4 in the detection mechanism can be driven by the drive mechanism 3 to extend axially out of the box 1 to contact the concrete, the detection device can push the outer sleeve 4 to be tested by the drive mechanism 3 during use. The pressure sensor 2 measures the resistance exerted by the concrete to be tested on the outer sleeve 4, thereby preliminarily judging and detecting the solidification state of the concrete to be tested. The structural design is simple and reasonable.

[0051] Furthermore, during the testing process, when the resistance detected by the pressure sensor 2 is less than the preset threshold, it indicates that the concrete to be tested is in a dilute flow state. As the outer sleeve 4 comes into contact with the concrete to be tested under the action of the drive mechanism 3, the front end face of the inner push rod 5 and the front end port of the outer sleeve 4 form a testing cavity 6 for the concrete to enter. At this time, the concrete to be tested will enter the testing cavity 6. The drive assembly can drive the inner push rod 5 to move axially within the outer sleeve 4, so that its end face directly contacts the concrete to be tested and pushes it, thereby detecting the pure axial resistance data of the concrete to be tested. This allows construction personnel to accurately analyze the actual rheological characteristics and solidification process of the concrete based on the resistance data. During this testing process, the inner push rod 5 remains entirely within the internal cavity of the outer sleeve 4. Its outer wall only forms a sliding seal with the inner wall of the outer sleeve 4, without any direct contact with the concrete to be tested. This completely avoids the interference of side friction caused by the contact between the outer wall and the concrete in existing integrated testing probes. As a result, the force signal collected by the testing component at the end of the inner push rod 5 is only the pure axial resistance exerted by the concrete to be tested on the end face of the inner push rod 5, rather than the composite resistance formed by the superposition of side friction and axial resistance. This fundamentally solves the defects of existing testing devices caused by the superposition of resistance, such as distorted test data and insufficient accuracy. It also eliminates the test error caused by the superposition of resistance, ensuring the reliability and accuracy of the test data even in the high-pressure environment of ultra-deep strata.

[0052] Understandably, after the test is completed, the drive mechanism 3 can drive the outer sleeve 4 to retract into the housing 1, while the drive component can simultaneously drive the inner push rod 5 to push the concrete to be tested and make it flow back to the outside of the test chamber 6. This not only completely discharges the residual concrete, mud and sand particles in the test chamber 6 to the outside of the outer sleeve 4, effectively preventing the residual materials from solidifying and hardening in the test chamber 6, and preventing problems such as the inner push rod 5 getting stuck and the volume deviation of the test chamber 6 during subsequent tests, but also ensures the stability and consistency of the test accuracy of the test device after multiple reuses. The test chamber 6 can be self-cleaned without the need for an additional cleaning mechanism, which is suitable for the working environment in ultra-deep strata construction where it is difficult to carry out manual disassembly and cleaning, and reduces the device maintenance cost during on-site construction.

[0053] Furthermore, when the resistance detected by the pressure sensor 2 is equal to or greater than the preset threshold, it indicates that the concrete to be tested is in a solidified state. At this time, the concrete to be tested is difficult to effectively enter the testing chamber 6, and the outer sleeve 4 does not need to go deeper. The inner push rod 5 is driven by the drive component to move along the axis of the outer sleeve 4 toward the concrete to be tested, so that the front end face of the inner push rod 5 directly contacts the concrete to be tested and completes the axial pushing action. During this process, the inner push rod 5 is in the internal cavity of the outer sleeve 4 throughout, and its outer wall is still only in sliding and sealing cooperation with the inner wall of the outer sleeve 4, without any contact with the external concrete, thus maintaining the complete double-layer shielding effect and completely avoiding the interference of side friction resistance. Then, the axial force signal of the inner push rod 5 during the pushing process is collected by the detection component at the end of the inner push rod 5, thereby completing the secondary verification of the solidification state of the concrete to be tested. This can help construction personnel determine the hardening grade of the concrete, forming a dual detection of macroscopic initial judgment by the outer sleeve 4 and precise verification by the inner push rod 5, thereby effectively avoiding the misjudgment problem caused by single detection data and significantly improving the reliability and accuracy of the detection results.

[0054] Therefore, the testing scheme of this embodiment can fully adapt to the testing needs of concrete throughout the entire solidification cycle, from the dilute flow state, plastic flow state, hard plastic state to the completely solid state. It can complete the entire process of testing after concrete pouring, including determining the initial setting time, tracking the solidification process, and verifying the final hardening grade, without replacing the testing components or adjusting the device structure. It can fully meet the quality control needs of the entire construction process of ultra-deep anti-seepage walls in water conservancy and hydropower projects, and has great practical engineering value.

[0055] It should be noted that, as one implementation method, the drive mechanism 3 can be selected as a screw transmission mechanism driven by a servo motor in the prior art. On the one hand, the drive mechanism 3 can drive the outer sleeve 4 to move telescopically relative to the box 1, thereby realizing the preliminary detection of the concrete to be tested. On the other hand, the drive mechanism 3 can also drive the outer sleeve 4 to rotate relative to the box 1, so that it can be screwed into the concrete to be tested, rather than directly penetrating it. This can significantly reduce the impact and structural disturbance on the front end of the outer sleeve 4 and the concrete to be tested. Especially for non-solidified concrete in a dilute or plastic flow state, it can effectively avoid problems such as concrete segregation and changes in rheological state caused by direct penetration. Furthermore, the preset threshold mentioned in this embodiment is a conventional value pre-calibrated by those skilled in the art based on the design grade, target strength, and working condition parameters of the ultra-deep strata of the concrete to be tested. It can be dynamically adjusted according to the actual situation of on-site construction. The detection component is a conventional force sensing element in the prior art that can collect axial force signals, including but not limited to miniature pressure sensors, strain gauge force sensors, piezoelectric force sensors, etc. Its sampling frequency and range can be adapted and adjusted according to the actual needs of concrete testing to ensure that the pure axial force signal during the axial movement of the inner push rod 5 can be accurately collected.

[0056] Example 2:

[0057] This embodiment, based on Embodiment 1, further optimizes the structure and adds functions to the detection mechanism to further improve the detection accuracy and operational stability of the device under ultra-deep, high-pressure, and multi-impurity conditions. Specifically, as follows... Figures 4 to 8 As shown, the inner push rod 5 is also provided with a push block 7 for blocking the detection component at one end near the detection cavity 6. The outer wall of the push block 7 slides and seals with the inner wall of the outer sleeve 4.

[0058] In this embodiment, since the inner push rod 5 is also provided with a push block 7 for shielding the detection component at the end near the detection cavity 6, it can not only avoid the detection component from directly contacting the concrete slurry, mud, and sand particles, thus shortening its service life, but also avoid the detection component from being affected by the distortion of force signal acquisition, thus affecting the accuracy of the detection results. At the same time, through the sliding sealing cooperation between the outer wall of the push block 7 and the inner wall of the outer sleeve 4, the isolation effect between the detection cavity 6 and the inner cavity of the outer sleeve 4 can be ensured, thereby effectively preventing the concrete slurry, mud, and sand in the detection cavity 6 from leaking into the inner sleeve 4, avoiding impurities from entering the inner sleeve 4 and causing jamming and wear to the drive component, thus ensuring the operational stability of the drive component.

[0059] Example 3:

[0060] This embodiment, based on embodiment 2, further optimizes the structure and adds functions to the detection mechanism to ensure the smooth axial movement of the inner push rod 5. Specifically, as follows... Figures 4 to 8As shown, the inner wall of the outer sleeve 4 is provided with a plurality of pressure relief holes 8 that communicate with the inner cavity of the housing 1 along its circumference. The plurality of pressure relief holes 8 are all located between the push block 7 and the drive assembly.

[0061] Because the inner wall of the outer sleeve 4 is provided with several pressure relief holes 8 that communicate with the inner cavity of the housing 1 at intervals along its circumference, when the drive assembly drives the inner push rod 5 to retract towards the detection cavity 6, the volume of the inner cavity of the outer sleeve 4 between the push block 7 and the drive assembly will gradually decrease as the push block 7 moves. If the cavity is in a sealed state, the gas inside cannot be discharged and will form a continuously increasing back pressure. This back pressure will not only hinder the smooth axial movement of the inner push rod 5, but will also generate additional force and mix into the signal collected by the detection assembly, causing secondary distortion of the detection data. In this embodiment, the pressure relief hole 8 connects the sealed cavity to the inner cavity of the box 1, thereby achieving real-time pressure balance between the inner cavity of the outer sleeve 4 and the box 1. That is, during the movement of the push block 7, the compressed gas in the cavity and the small amount of leaked slurry can be smoothly discharged into the inner cavity of the box 1 through the pressure relief hole 8, thereby completely eliminating the dual interference of back pressure on the detection process. This not only ensures the stability of the axial movement of the inner push rod 5, but also further ensures that the force signal collected by the detection component is only the pure axial resistance applied by the concrete, thus further improving the accuracy of the detection data.

[0062] Example 4:

[0063] This embodiment, based on embodiment 3, further enhances the device's adaptability to detecting complex concrete conditions in ultra-deep strata by adding a new cone 9. Specifically, as shown... Figure 5 , Figure 6 and Figure 8 As shown, a cone 9 is detachably mounted on the end face of the push block 7 facing the detection cavity 6.

[0064] In this embodiment, when the inner push rod 5 drives the push block 7 to move axially along the outer sleeve 4 to squeeze the concrete in the detection chamber 6, the cone head 9 will first contact the concrete in the detection chamber 6. Through the piercing effect of the cone-shaped structure of the cone head 9, the concrete in the detection chamber 6 is pre-guided and dispersed. Especially for concrete with local initial set lumps and mixed sand and gravel particles in the detection chamber 6, it can effectively break up the lumps and guide the sand and gravel, greatly reducing the local resistance encountered by the push block 7 when directly pushing the concrete. This avoids the pushing action jamming caused by sudden changes in local resistance, and at the same time prevents the force signal of the detection component from fluctuating drastically due to sudden changes in resistance, ensuring the continuity and stability of the detection signal. The detachable installation design of the cone head 9, such as using a threaded connection, can adapt to the long-term testing needs of ultra-deep strata. After wear and deformation, it can be disassembled and replaced separately without replacing the entire push block 7, which greatly reduces the later maintenance cost of the device. At the same time, the cone head 9 with different cone angles can be replaced according to the grade and flow characteristics of the concrete to be tested, improving the device's adaptability to the testing of concrete under different working conditions.

[0065] Example 5:

[0066] Based on Example 4, this embodiment effectively avoids the pressure buildup problem in the detection chamber 6 caused by the inability of concrete to be discharged in time by adding a guide hole, and ensures that the axial pushing action of the pusher block 7 remains stable. Specifically, as Figure 5 , Figure 6 and Figure 8 As shown, several guide holes are provided on the inner wall of the outer sleeve 4 at the position corresponding to the detection cavity 6.

[0067] In this embodiment, when the pusher 7 drives the cone 9 to squeeze the concrete in the detection chamber 6, the concrete in the detection chamber 6 will have an outward flow tendency due to the squeezing. The guide hole can provide a stable and smooth discharge channel for this part of the concrete, so that the squeezed concrete in the detection chamber 6 can be quickly discharged to the outside of the outer sleeve 4 along the guide hole. This effectively avoids the problem of pressure buildup caused by the inability of concrete to be discharged in time in the detection chamber 6, and keeps the axial pushing action of the pusher 7 stable. At the same time, the simple axial squeezing detection is transformed into an extrusion detection that is more in line with the needs of rheological detection. During the extrusion process of concrete through the guide hole, its rheological characteristics such as viscous resistance and shear yield stress will be more intuitively reflected in the force signal collected by the detection component. This allows construction personnel to analyze the rheological parameters of concrete more accurately based on the signal and achieve a refined determination of the flow state level of concrete.

[0068] Example 6:

[0069] This embodiment, based on embodiment 5, achieves directional and smooth flow of concrete within the detection chamber 6 through the addition of a guide channel 10, making the extrusion and flow of concrete smoother. Specifically, as... Figure 5 , Figure 6 and Figure 8 As shown, the end face of the push block 7 facing the detection chamber 6 is also provided with several guide grooves 10. The guide grooves 10 extend from the cone head 9 to the outer wall of the push block 7. The guide grooves 10 are used to guide the concrete in the detection chamber 6 to the guide holes. In this embodiment, when the push block 7 drives the cone head 9 to squeeze the concrete in the detection chamber 6, after the cone head 9 completes the piercing and guiding of the concrete, the concrete in the detection chamber 6 will flow under the action of the squeezing force. The guide grooves 10 can provide a fixed guiding path for the flow of concrete, so that the concrete can flow quickly and orderly from around the cone head 9 along the guide grooves 10 to the outer wall of the push block 7, and be accurately guided to the guide holes on the outer sleeve 4. This avoids the problems of local accumulation and uneven flow of concrete in the detection chamber 6, prevents the poor feeding of the guide holes and the local pressure in the detection chamber 6 caused by disordered concrete flow, and improves the smoothness of concrete extrusion flow.

[0070] Example 7:

[0071] This embodiment, based on embodiment 6, improves the sealing and isolation effect between the pusher block 7 and the outer sleeve 4 by providing a dustproof ring 11 and a sealing ring 12 on the outer wall of the pusher block 7. This makes the device more adaptable to the harsh working conditions of ultra-deep formations with high mud, abundant sand and gravel, and high-pressure slurry. Figure 6 and Figure 8 As shown, two annular grooves are spaced apart along the axial direction on the outer wall of the pusher block 7. A dustproof ring 11 is provided in the annular groove near the detection chamber 6. The lip of the dustproof ring 11 faces the detection chamber 6 and is used to scrape off mud and sand. A sealing ring 12 is provided in the other annular groove. The sealing ring 12 is used to seal the high-pressure slurry.

[0072] In this embodiment, two annular grooves are spaced apart along the axial direction on the outer wall of the push block 7. The two annular grooves are radially recessed along the push block 7, and the groove dimensions match the suitable sealing elements and are used to install the dustproof ring 11 and the sealing ring 12, respectively. The dustproof ring 11 is provided in the annular groove near the detection chamber 6, and the lip of the dustproof ring 11 is set towards the detection chamber 6. During the process of the push block 7 moving axially along the inner wall of the outer sleeve 4 with the inner push rod 5, the lip of the dustproof ring 11 is always in close contact with the inner wall of the outer sleeve 4, thereby scraping off the mud and sand particles attached to the inner wall of the outer sleeve 4. Solid impurities are removed, and sand and gravel in the detection chamber 6 are prevented from entering the gap between the push block 7 and the outer sleeve 4. This ensures the smooth sliding of the push block 7 and provides structural protection for subsequent high-pressure sealing, extending the service life of the overall sealing structure. Meanwhile, a sealing ring 12 is installed in another annular groove away from the detection chamber 6. The sealing ring 12 can block the high-pressure slurry in ultra-deep formations, thus forming a second sealing line on the push block 7. This further improves the isolation effect between the detection chamber 6 and the internal cavity of the outer sleeve 4, ensuring the cleanliness and dryness of the cavity behind the push block 7 and its internal structure.

[0073] Furthermore, it should be noted that although the sliding fit between the sealing ring 12 and the inner wall of the outer sleeve 4 generates a certain mechanical frictional resistance, this frictional resistance is a controllable and fixed friction within the device. The value of this frictional force is far less than the lateral frictional resistance generated by the direct contact between the integrated detection probe and concrete in existing technologies. Moreover, it will not change with pressure variations in ultra-deep strata, or with fluctuations in the viscosity and flow regime of the concrete, and its impact on the force signal acquired by the detection component is negligible. Simultaneously, this frictional resistance can be accurately compensated for through prior calibration. Only simple parameter calibration during data processing is required to completely eliminate its interference with the pure axial resistance signal, thus preventing data distortion. In contrast, existing integrated probes suffer from side friction resistance due to the high viscosity of concrete and the high pressure of ultra-deep strata. This resistance is large and fluctuates wildly, and it also combines with axial resistance to form a compound resistance, which is the core reason for the distortion of the detection data. The present invention completely eliminates this kind of uncontrollable side friction resistance through the double-layer shielding structure of the outer sleeve 4 and the inner push rod 5, and introduces only a small amount of calibrable and negligible fixed sealing friction, which fundamentally and significantly reduces the detection error.

[0074] Example 8:

[0075] This embodiment, based on embodiment 7, makes specific structural limitations on the drive assembly. By adopting a hydraulically driven structural design, it provides a stable, precise, and adaptable driving force for the axial movement of the inner push rod 5 under ultra-deep formation and high-pressure conditions, while maintaining the compactness of the overall device structure. Specifically, as shown... Figures 6 to 8 As shown, the drive assembly includes a hydraulic pump 13, a water tank 14, a cylinder 15, a piston 16, and an end cap 17. The cylinder 15 is disposed inside the outer sleeve 4, and an end cap 17 is provided at one end of the cylinder 15. One end of the inner push rod 5 passes through the end cap 17 and extends into the cylinder 15, and the end of the inner push rod 5 located inside the cylinder 15 is connected to the piston 16, which slides and seals with the inner wall of the cylinder 15. An inlet and outlet communicating with the hydraulic pump 13 are provided on the side wall of the cylinder 15, and the hydraulic pump 13 is connected to the water tank 14 through a liquid delivery pipe.

[0076] In this embodiment, the cylinder 15 in the drive assembly is coaxially disposed inside the outer sleeve 4, and an end cap 17 is fixedly disposed at one end. The end cap 17 can not only form a sealing protection for the end of the cylinder 15, but also provide positioning guidance for the insertion of the inner push rod 5. At the same time, the end of the inner push rod 5 away from the detection cavity 6 passes through the end cap 17 and extends coaxially into the cylinder 15, and is fixedly connected to the piston 16. The outer wall of the piston 16 and the inner wall of the cylinder 15 achieve a high-precision sliding seal fit, thereby ensuring the sealing performance of the hydraulic drive and the effectiveness of power transmission, and avoiding problems such as insufficient driving force or action jamming caused by hydraulic medium leakage. In addition, since the cylinder body 15 has inlet and outlet on its side wall, the inlet and outlet can be connected to the hydraulic pump 13 through hydraulic pipelines. The hydraulic pump 13 is connected to the water tank 14 through the liquid delivery pipe. This allows the water tank 14 to provide sufficient hydraulic medium for hydraulic drive. The hydraulic pump 13 serves as a power source to pressurize, deliver and pump back the hydraulic medium, thus forming a complete hydraulic medium circulation link. The structural design is simple and reasonable.

[0077] Furthermore, in this embodiment, when the drive assembly is working, the hydraulic pump 13 draws hydraulic medium from the water tank 14 and pressurizes it, then delivers it to one side of the piston 16 inside the cylinder 15 through the inlet and outlet on the cylinder 15. The high-pressure thrust of the hydraulic medium pushes the piston 16 to move axially along the inner wall of the cylinder 15. The piston 16 simultaneously drives the inner push rod 5 to move towards the detection chamber 6 inside the outer sleeve 4, thereby enabling the extrusion action on the concrete inside the detection chamber 6. When it is necessary to drive the inner push rod 5 to reverse and reset, the hydraulic pump 13 draws back the hydraulic medium inside the cylinder 15 through the inlet and outlet. The pressure difference inside the cylinder 15 drives the piston 16 to move in the opposite direction, thereby pulling the inner push rod 5 back to the initial position. Compared to other linear drive methods, the advantage of hydraulic drive lies in its ability to provide a smooth and precisely adjustable axial driving force for the inner push rod 5. It can flexibly adjust the moving speed and pushing pressure of the inner push rod 5 according to the flow characteristics of the concrete to be tested. This avoids excessive disturbance of the concrete flow due to excessive pushing force, while ensuring effective compression of stiff plastic concrete. It is suitable for testing concrete in all flow states, from dilute to stiff plastic. At the same time, the hydraulic drive system has a stronger load-bearing capacity and can effectively overcome the external resistance brought by the high-pressure environment of ultra-deep strata, ensuring that the axial movement of the inner push rod 5 is precise and smooth, without insufficient power or jamming.

[0078] Example 9:

[0079] This embodiment, based on embodiment 8, further optimizes the structure and adds functionality to the drive assembly. By adding an elastic element 18, it achieves precise assistance in the reset action of the inner push rod 5 and buffers and reduces vibrations during the drive process, further improving the stability of the drive assembly's operation and the reliability of its reset. Specifically, as shown... Figures 6 to 8As shown, the drive assembly also includes an elastic element 18, which is sleeved on the inner push rod 5. The two ends of the elastic element 18 are connected to the end cap 17 and the piston 16 respectively, and the end cap 17 and the piston 16 are respectively provided with grooves for the elastic element 18 to extend into.

[0080] In this embodiment, the elastic element 18 serves to assist in reset and provide cushioning and shock absorption. Specifically, regarding the assisted reset, when the component reset state is entered after the detection is completed, the hydraulic pump 13 draws back the driving medium in the cylinder 15 through the infusion pipe, and the hydraulic driving force in the cylinder 15 disappears. At this time, the elastic element 18 begins to recover from the compression deformation caused by the forward movement of the inner push rod 5 in the early stage. The elastic reset force it releases directly acts on the piston 16, thereby driving the piston 16 to move axially along the inner wall of the cylinder 15 away from the detection chamber 6, and thus pulling the inner push rod 5 to move synchronously in the opposite direction to the initial position. The elastic reset force of the elastic element 18 can provide effective auxiliary power for hydraulic reset, avoiding problems such as untimely reset, incomplete reset, and jamming of the inner push rod 5 after the hydraulic drive draws back the medium, making the reset action of the inner push rod 5 faster and more accurate.

[0081] Meanwhile, in terms of buffering and shock absorption, when the hydraulic pump 13 drives the piston 16 to move the inner push rod 5 towards the detection chamber 6 and squeezes the concrete in the detection chamber 6, the elastic element 18 is compressed synchronously with the movement of the piston 16. This effectively buffers the hard contact impact between the piston 16 and the end cover 17, effectively preventing mechanical wear and component deformation caused by the piston 16 colliding with the end cover 17 when it moves to the limit position, and extending the service life of the precision components inside the drive assembly. In addition, during the process of squeezing concrete, if there are concrete lumps, sand particles, etc. in the detection chamber 6, causing a sudden increase in the resistance of the push block 7, the compression deformation of the elastic element 18 can absorb the impact caused by the sudden change in resistance, keeping the axial movement of the inner push rod 5 stable, avoiding violent fluctuations in the force signal of the detection assembly caused by the sudden change in resistance, and making the resistance signal collected by the detection assembly more stable and continuous, which is conducive to improving the accuracy of subsequent concrete rheological parameter analysis and flow level determination.

[0082] Example 10:

[0083] like Figures 4 to 8 As shown, this embodiment provides a double-layer shielded ultra-deep concrete flow regime detection method, which utilizes the double-layer shielded ultra-deep concrete flow regime detection device as described above, and specifically includes the following steps:

[0084] S1. Macroscopic detection steps: Control the drive mechanism 3 to drive the outer sleeve 4 to extend out of the box 1 to contact the concrete, and obtain the first axial resistance signal of the outer sleeve 4 through the pressure sensor 2.

[0085] S2. Initial state judgment step: The macroscopic state of the concrete is judged based on the first axial resistance signal. If the first axial resistance signal is greater than the preset solid state threshold, the concrete is determined to be in a solid or hard plastic state. The control drive component drives the inner push rod 5 to move axially until the push block 7 is flush with the front end face of the outer sleeve 4. The push block 7 squeezes the concrete and obtains the second axial resistance signal through the detection component to assist in verifying the solid / hard plastic state level. If the first axial resistance signal is less than the preset solid state threshold, the outer sleeve 4 continues to go deeper, allowing the concrete to enter the detection cavity 6 at the front end of the outer sleeve 4.

[0086] S3. Microscopic detection steps: When concrete enters the detection chamber 6, the control drive assembly drives the inner push rod 5 to move axially. The push block 7 at the front end of the inner push rod 5 squeezes the concrete in the detection chamber 6, causing the concrete to be discharged outward through the guide hole. At the same time, the detection assembly obtains the second axial resistance signal received by the inner push rod 5.

[0087] S4. Flow determination step: Based on the magnitude and trend of the second axial resistance signal, analyze the rheological parameters of the concrete to determine the flow level of the concrete.

[0088] S5. Component Reset Step: After the test is completed, the hydraulic pump 13 is controlled to draw back the driving medium in the cylinder 15 through the infusion pipe. Under the action of the elastic reset force of the elastic element 18, the piston 16 drives the inner push rod 5 to move in the reverse direction along the axis to the initial position. At the same time, the drive mechanism 3 drives the outer sleeve 4 to retract axially into the housing 1, completing the reset of one test process.

[0089] Working Principle: The detection method in this embodiment is based on the double-layer shielding detection principle and graded detection strategy, realizing accurate detection of ultra-deep concrete throughout its entire lifecycle from fluid to solid state. Step S1 is the macroscopic detection stage. The drive mechanism 3 drives the outer sleeve 4 to extend. The outer sleeve 4, as the outer shielding structure, first contacts the concrete. At this time, the first axial resistance signal collected by the pressure sensor 2 reflects the comprehensive resistance encountered by the outer sleeve 4 during its advancement. This step can quickly perform a preliminary screening of the macroscopic state of the concrete. Step S2 is the initial state judgment and diversion processing stage. The first axial resistance signal is compared with a preset solid state threshold. If the resistance is greater than the threshold, it indicates that the concrete has solidified or is in a hard plastic state. At this time, the outer sleeve 4 is difficult to penetrate deeply. The inner push rod 5 is directly controlled to extend to be flush with the end face of the outer sleeve 4. The push block 7 is used to push the concrete. The second axial resistance signal obtained by the detection component is used for auxiliary verification, thereby accurately determining the hardening level and avoiding damage to the device or concrete structure caused by forced penetration. If the resistance is less than the threshold, it indicates that the concrete is in a thin flow state or a plastic flow state. The outer sleeve 4 continues to penetrate deeply so that the concrete fills the detection cavity 6, providing a sample for subsequent microscopic detection.

[0090] Step S3 is the core microscopic detection stage. After the concrete enters the detection chamber 6, the drive assembly drives the inner push rod 5 to compress the concrete. Since the inner push rod 5 is located inside the outer sleeve 4, its sidewall does not contact the external concrete, effectively shielding it from interference from external side friction. The second axial resistance signal collected by the detection assembly is only the pure axial resistance of the push block 7 compressing the concrete. In particular, when the concrete is compressed and discharged outward through the guide hole, this process is essentially an extrusion process. The magnitude and trend of the second axial resistance signal directly map the rheological parameters of the concrete, such as yield stress and plastic viscosity, thereby enabling accurate determination of the flow regime of the concrete. Step S4 is the flow regime determination stage, where the resistance signal is analyzed to achieve a quantitative assessment of the rheological properties of the concrete. Step S5 is the reset and self-cleaning stage. After the test is completed, the hydraulic pump 13 draws back the driving medium, the piston 16 resets under the action of the elastic element 18, and the drive mechanism 3 retracts the outer sleeve 4. During this process, the retraction action of the outer sleeve 4 allows the concrete attached to its outer wall to be scraped off under the action of the joint pipe 500, realizing the self-cleaning of the outer sleeve 4 and preventing the concrete from solidifying on the outer wall of the outer sleeve 4, which would cause subsequent expansion and contraction to become stuck.

[0091] The beneficial effects of this embodiment are as follows: The detection method of this embodiment is simple and easy to operate. Based on the detection device of embodiments 1-9, it realizes in-situ real-time detection of the flow state of ultra-deep stratum concrete, abandons the existing technology of ground equivalent model simulation detection and empirical prediction of concrete initial setting time, fundamentally overcomes the detection error caused by stratum environmental disturbance (high pressure, temperature change, water inrush, etc.), and the detection data can truly reflect the actual flow state and solidification state of ultra-deep stratum concrete, providing accurate judgment basis for the subsequent procedures of water conservancy and hydropower ultra-deep anti-seepage wall construction.

[0092] This testing method employs a two-stage testing logic: macroscopic initial judgment using the outer sleeve 4 and precise detection using the inner push rod 5. This not only enables rapid initial screening of the concrete's flow state but also allows for the detection of rheological parameters or verification of solidification grade for concrete with different flow states. This effectively avoids misjudgment caused by single testing and significantly improves the reliability and accuracy of the test results. Furthermore, the double-layer shielding structure of the device throughout the testing process completely eliminates the interference of side friction on the test data.

[0093] The method is highly integrated with the structural design of the device. The rotation and screwing of the outer sleeve 4, the extrusion detection of the inner push rod 5, and the self-cleaning reset of the device can all be automatically controlled by motors and hydraulic components, eliminating the need for manual on-site operation and reducing the operational difficulty of ultra-deep concrete testing. Furthermore, after the test is completed, the self-cleaning structure of the device can clean the impurities in the test chamber 6 and the outer sleeve 4, eliminating the need for additional cleaning procedures and improving the efficiency of construction testing. This method is suitable for the continuous testing needs of multiple points and frequencies in the construction of ultra-deep seepage prevention walls.

[0094] Furthermore, this testing method can flexibly adjust parameters such as the screwing speed of the outer sleeve 4, the extrusion speed of the inner push rod 5, and the preset threshold according to the actual construction conditions of ultra-deep strata, adapting to the testing needs of concrete of different design grades and different solidification stages. At the same time, it is compatible with all structural optimization designs of the device (double-stage sealing, flow guiding of the cone head 9, auxiliary reset of the elastic element 18, etc.), further improving the adaptability and practicality of the method and fully meeting the quality control requirements of ultra-deep strata concrete construction in water conservancy and hydropower projects.

[0095] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A double-layer shielded ultra-deep concrete flow state detection device, comprising a box (1) disposed within a connector pipe, wherein a pressure sensor (2) for collecting axial pressure is disposed within the box (1), and a drive mechanism (3) connected to the pressure sensor (2) and providing axial driving force is provided therein, characterized in that, It also includes a detection mechanism, which includes an outer sleeve (4), an inner push rod (5), a drive assembly, and a detection assembly; The outer sleeve (4) is axially connected to the pressure sensor (2) and is driven by the drive mechanism (3) to extend axially out of the box (1) to contact the concrete. The inner push rod (5) and the drive assembly are provided inside the outer sleeve (4). The outer wall of the inner push rod (5) is slidably sealed with the inner wall of the outer sleeve (4), and the front end face of the inner push rod (5) and the front end port of the outer sleeve (4) form a detection cavity (6) for the concrete to enter. The drive assembly is used to drive the inner push rod (5) to move axially inside the outer sleeve (4) so ​​that the front end of the inner push rod (5) squeezes the concrete in the detection cavity (6). The detection assembly is provided at one end of the inner push rod (5) near the detection cavity (6). The detection assembly is used to detect the force signal when the inner push rod (5) moves axially.

2. The double-layer shielded ultra-deep concrete flow regime detection device according to claim 1, characterized in that, The inner push rod (5) near the detection cavity (6) is also provided with a push block (7) for shielding the detection component. The outer wall of the push block (7) is in sliding sealing cooperation with the inner wall of the outer sleeve (4).

3. The double-layer shielded ultra-deep concrete flow regime detection device according to claim 2, characterized in that, The inner wall of the outer sleeve (4) is provided with a plurality of pressure relief holes (8) that communicate with the inner cavity of the box body (1) at intervals along its circumference. The plurality of pressure relief holes (8) are all located between the push block (7) and the drive assembly.

4. The double-layer shielded ultra-deep concrete flow regime detection device according to claim 3, characterized in that, A cone (9) is detachably mounted on the end face of the push block (7) facing the detection cavity (6).

5. A double-layer shielded ultra-deep concrete flow regime detection device according to claim 4, characterized in that, The inner wall of the outer sleeve (4) is provided with several guide holes corresponding to the position of the detection cavity (6).

6. The double-layer shielded ultra-deep concrete flow detection device according to claim 5, characterized in that, The push block (7) has several guide grooves (10) on its end face facing the detection cavity (6). The guide grooves (10) extend from the cone head (9) to the outer wall of the push block (7). The guide grooves (10) are used to guide the concrete in the detection cavity (6) to the guide hole.

7. A double-layer shielded ultra-deep concrete flow regime detection device according to claim 6, characterized in that, Two annular grooves are spaced apart along the axial direction on the outer wall of the pusher (7). A dustproof ring (11) is provided in the annular groove near the detection chamber (6). The lip of the dustproof ring (11) is set towards the detection chamber (6) and is used to scrape off mud and sand. A sealing ring (12) is provided in the other annular groove. The sealing ring (12) is used to seal the high-pressure slurry.

8. A double-layer shielded ultra-deep concrete flow regime detection device according to claim 7, characterized in that, The drive assembly includes a hydraulic pump (13), a water tank (14), a cylinder (15), a piston (16), and an end cap (17). The cylinder (15) is located inside the outer sleeve (4), and the end cap (17) is provided at one end of the cylinder (15). One end of the inner push rod (5) passes through the end cap (17) and extends into the cylinder (15), and the end of the inner push rod (5) located inside the cylinder (15) is connected to the piston (16) which slides and seals with the inner wall of the cylinder (15). The side wall of the cylinder (15) is provided with an inlet and outlet that communicate with the hydraulic pump (13), and the hydraulic pump (13) is connected to the water tank (14) through a liquid delivery pipe.

9. A double-layer shielded ultra-deep concrete flow regime detection device according to claim 8, characterized in that, The drive assembly also includes an elastic element (18), which is sleeved on the inner push rod (5). The two ends of the elastic element (18) are respectively connected to the end cap (17) and the piston (16), and the end cap (17) and the piston (16) are respectively provided with grooves for the elastic element (18) to extend into.

10. A method for detecting the flow regime of ultra-deep concrete in a double-layer shielded system, comprising the double-layer shielded ultra-deep concrete flow regime detection device as described in claim 9, characterized in that, Includes the following steps: S1. Macroscopic detection steps: Control the drive mechanism (3) to drive the outer sleeve (4) to extend out of the box (1) to contact the concrete, and obtain the first axial resistance signal of the outer sleeve (4) through the pressure sensor (2); S2, Initial State Judgment Step: The macroscopic state of the concrete is determined based on the first axial resistance signal. If the first axial resistance signal is greater than the preset solid threshold, the concrete is determined to be in a solid or hard plastic state. The driving component is controlled to drive the inner push rod (5) to move axially until the push block (7) is flush with the front end face of the outer sleeve (4). The push block (7) squeezes the concrete and obtains the second axial resistance signal through the detection component to assist in verifying the solid / hard plastic state level. If the first axial resistance signal is less than the preset solid threshold, the outer sleeve (4) continues to penetrate deeper, allowing the concrete to enter the detection cavity (6) at the front end of the outer sleeve (4). S3. Microscopic detection steps: When concrete enters the detection chamber (6), the driving component is controlled to drive the inner push rod (5) to move axially. The push block (7) at the front end of the inner push rod (5) squeezes the concrete in the detection chamber (6) so that the concrete is discharged outward through the guide hole. At the same time, the second axial resistance signal of the inner push rod (5) is obtained through the detection component. S4. Flow determination step: Based on the magnitude and trend of the second axial resistance signal, analyze the rheological parameters of the concrete to determine the flow level of the concrete. S5. Component reset step: After the test is completed, the hydraulic pump (13) is controlled to draw back the driving medium in the cylinder (15) through the infusion pipe. Under the action of the elastic reset force of the elastic element (18), the piston (16) drives the inner push rod (5) to move in the opposite direction along the axis to the initial position. At the same time, the drive mechanism (3) drives the outer sleeve (4) to retract axially into the box (1) to complete the reset of one test process.

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