Hydropower station embedded hanging ring bearing capacity detection device and method

Abstract

The invention discloses a hydropower station pre-embedded hanging ring bearing capacity detection device and method. The hydropower station pre-embedded hanging ring bearing capacity detection device comprises a supporting frame, a loading hook and a telescopic assembly. The supporting end of the supporting frame is used for being connected with a wall where a hanging ring is embedded. The fixed end of the telescopic assembly is arranged on the supporting frame, and the movable end of the telescopic assembly is far away from the supporting end of the supporting frame. The hook end of the loading lifting hook is used for being connected with an embedded lifting ring, and the traction end of the loading lifting hook is connected with the moving end of the telescopic assembly; and a force sensor is arranged between the loading lifting hook and the telescopic assembly. The tension force applied to the embedded hanging ring by the telescopic assembly and the loading lifting hook is collected through the force sensor, and accurate data collected in the testing process is used for evaluating the bearing capacity of the embedded hanging ring; the bearing capacity test of the pre-embedded lifting ring is verified by means of theoretically calculating a test threshold value, gradually loading and verifying a theoretical value, and verifying a short-time overload working condition by a dynamic load test, so that the accuracy and safety of the bearing capacity detection of the pre-embedded lifting ring are improved.

Description

Technical Field

[0001] This invention relates to the field of embedded lifting ring testing technology, and in particular to a device and method for testing the load-bearing capacity of embedded lifting rings in hydropower stations. Background Technology

[0002] Embedded lifting rings are critical load-bearing components in the lifting and transportation of hydropower station facilities and equipment, and their load-bearing capacity directly affects the safety and stability of the structure. Currently, the pull-out test method is mainly used to test the load-bearing capacity of embedded lifting rings. However, the ultimate load-bearing capacity of embedded lifting rings is difficult to obtain, and excessive loading can easily cause structural damage to the embedded lifting rings. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a device and method for testing the bearing capacity of pre-embedded lifting rings in hydropower stations, so as to improve the accuracy and safety of testing the bearing capacity of pre-embedded lifting rings.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A device for testing the load-bearing capacity of a pre-embedded lifting ring in a hydropower station includes a support frame, a loading hook, and a telescopic assembly. The support end of the support frame is used to connect to the wall containing the pre-embedded lifting ring. The fixed end of the telescopic assembly is disposed on the support frame, and the movable end of the telescopic assembly is located away from the support end of the support frame. The hook end of the loading hook is used to connect to the pre-embedded lifting ring, and the pulling end of the loading hook is connected to the movable end of the telescopic assembly. A force sensor is disposed between the loading hook and the telescopic assembly.

[0005] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows: A method for testing the bearing capacity of pre-embedded lifting rings in hydropower stations, applied to the aforementioned testing device for the bearing capacity of pre-embedded lifting rings in hydropower stations, the method comprising: Connect the support frame to the wall structure with the pre-embedded lifting ring; Connect the hook end of the loading hook to the pre-embedded lifting ring; The telescopic assembly is controlled to tighten the loading hook; Calculate the test threshold of the pre-embedded lifting ring; The test threshold is verified by gradually adjusting the tension force of the telescopic component on the loading hook. The short-term overload condition was verified by adjusting the pulling force of the telescopic component on the loading hook under dynamic load test conditions.

[0006] The beneficial effects of this invention are as follows: A hydropower station pre-embedded lifting ring bearing capacity testing device is constructed using a support frame, a loading hook, and a telescopic assembly. The support frame, connected to the wall of the pre-embedded lifting ring, provides overall support. A telescopic assembly is installed on the support frame, connecting the hook end of the loading hook to the pre-embedded lifting ring and the pulling end of the loading hook to the moving end of the telescopic assembly. By controlling the telescopic assembly, the pulling force of the loading hook on the pre-embedded lifting ring can be adjusted. A force sensor is also installed between the loading hook and the telescopic assembly, allowing the force sensor to collect the pulling force applied to the pre-embedded lifting ring by the telescopic assembly and the loading hook. Accurate data is collected during the test to evaluate the bearing capacity of the pre-embedded lifting ring. Furthermore, the bearing capacity of the pre-embedded lifting ring is tested and verified by theoretically calculating the test threshold, verifying the theoretical value through step-by-step loading, and verifying the short-term overload condition through dynamic load testing, thereby improving the accuracy and safety of the pre-embedded lifting ring bearing capacity testing. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of a hydropower station pre-embedded lifting ring bearing capacity testing device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the application structure of a hydropower station pre-embedded lifting ring bearing capacity testing device according to an embodiment of the present invention; Figure 3 This is a flowchart illustrating the steps of a method for detecting the bearing capacity of a pre-embedded lifting ring in a hydropower station, according to an embodiment of the present invention. Label Explanation: 1. Support frame; 11. Central crossbar; 12. Supporting steel frame; 2. Load the hook; 21. Pull the lead wire; 3. Telescopic assembly; 31. Pressure cylinder; 311. Piston rod; 32. Pulling plate; 4. Ring deformation collector; 5. Displacement sensor. Detailed Implementation

[0008] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0009] As a critical load-bearing component in the lifting and transport of hydropower station facilities and equipment, the load-bearing capacity of embedded lifting rings directly affects the safety and stability of the structure. Currently, the main technology used in this field is the pull-out test method to test the load-bearing capacity of embedded lifting rings. This involves applying a tensile force to the embedded lifting ring using a pull-out device and determining its load-bearing capacity based on the maximum pull-out force. However, due to factors such as missing drawings and structural aging, the ultimate load-bearing capacity of embedded lifting rings is difficult to obtain. Using only the pull-out test method cannot monitor the deformation of the embedded lifting ring and the surrounding concrete structure in real time, and excessive loading can easily cause structural damage to the embedded lifting ring. Therefore, the main problems with the load-bearing capacity testing of embedded lifting rings in this field are as follows: 1. Single testing dimension: The ultimate bearing capacity of the lifting ring is judged only by the constant load pull-out force, without considering the short-term overload that may occur during the actual use of the embedded lifting ring. As a result, the test results cannot reflect the actual stress state and deformation trend of the embedded lifting ring, which can easily lead to misjudgment of the bearing capacity of the embedded lifting ring.

[0010] 2. Insufficient data accuracy: Traditional pull-out testing only relies on visual identification of changes in the lifting ring under different tensile forces. It is difficult to capture the subtle deformation of the embedded lifting ring during the stress process, and it is impossible to grasp the subtle deformation of the embedded lifting ring itself and the surrounding concrete and the precise deformation data. Therefore, it cannot provide comprehensive data support for the safety assessment of the embedded lifting ring.

[0011] 3. Low detection efficiency: Existing detection devices require manual data recording and cannot achieve synchronous analysis of pull-out force and displacement data, resulting in long processing time for subsequent data.

[0012] To address the aforementioned technical problems, this invention provides a detection device and method capable of simultaneously detecting pull-out force and displacement around the embedded lifting ring, thereby improving the accuracy and safety of embedded lifting ring bearing capacity detection.

[0013] Please refer to Figure 1 A device for testing the load-bearing capacity of a pre-embedded lifting ring in a hydropower station includes a support frame 1, a loading hook 2, and a telescopic assembly 3. The support end of the support frame 1 is used to connect with the wall of the pre-embedded lifting ring. The fixed end of the telescopic assembly 3 is disposed on the support frame 1, and the moving end of the telescopic assembly 3 is away from the support end of the support frame 1. The hook end of the loading hook 2 is used to connect with the pre-embedded lifting ring, and the pulling end of the loading hook 2 is connected with the moving end of the telescopic assembly 3. A force sensor is disposed between the loading hook 2 and the telescopic assembly 3.

[0014] As described above, the beneficial effects of this invention are as follows: A hydropower station pre-embedded lifting ring bearing capacity testing device is constructed using a support frame 1, a loading hook 2, and a telescopic assembly 3. The support frame 1, connected to the wall of the pre-embedded lifting ring, provides overall support for the device. The telescopic assembly 3 is installed on the support frame 1, connecting the hook end of the loading hook 2 to the pre-embedded lifting ring and the pulling end of the loading hook 2 to the moving end of the telescopic assembly 3. By controlling the telescopic assembly 3, the pulling force of the loading hook 2 on the pre-embedded lifting ring can be adjusted. Furthermore, a force sensor is installed between the loading hook 2 and the telescopic assembly 3, allowing the force sensor to collect the pulling force applied to the pre-embedded lifting ring by the telescopic assembly 3 and the loading hook 2. Accurate data is collected during the testing process to evaluate the bearing capacity of the pre-embedded lifting ring, thereby improving the accuracy and safety of the pre-embedded lifting ring bearing capacity testing.

[0015] In one embodiment of this application, the telescopic assembly 3 includes a pressure cylinder 31; the fixed end of the pressure cylinder 31 is connected to the support frame 1; and the piston rod 311 of the pressure cylinder 31 is connected to the pulling end of the loading hook 2. For example, a hydraulic cylinder, pneumatic cylinder, or other pressure cylinder 31 can be used as the telescopic assembly 3.

[0016] As described above, a pressure cylinder 31 is used as the telescopic component 3. The pressure cylinder 31 is fixed on the support frame 1, and the piston rod 311 is connected to the pulling end of the loading hook 2. Thus, the movement of the pulling end of the loading hook 2 can be controlled by the piston rod 311 of the pressure cylinder 31, thereby adjusting the pulling force.

[0017] In one embodiment of this application, the telescopic assembly 3 further includes a traction plate 32; the center of the traction plate 32 is connected to the piston rod 311; the traction end of the loading hook 2 is provided with at least two traction leads 21; all the traction leads 21 are evenly connected to the traction plate 32 with the piston rod 311 as the center.

[0018] As can be seen from the above description, by connecting the piston rod 311 to the center of the pulling plate 32, and by providing multiple pulling leads 21 at the pulling end of the loading hook 2, and by connecting all the pulling leads 21 evenly to the pulling plate 32 with the piston rod 311 as the center, the hook end of the loading hook 2 can be subjected to uniform tension in all directions.

[0019] In one embodiment of this application, a central crossbar 11 is provided at the end of the support frame 1 away from the support end; the central crossbar 11 passes through the center point of the horizontal cross section of the support frame 1; the fixed end of the telescopic component 3 is provided on the central crossbar 11, and the movable end is on the side away from the support end.

[0020] As can be seen from the above description, by setting a central crossbar 11 on the support frame 1 and making the central crossbar 11 pass through the center point of the horizontal section of the support frame 1, the telescopic component 3 can be set at the center position of the support frame 1, so that the telescopic component 3 is subjected to a uniform supporting force.

[0021] In one embodiment of this application, the support frame 1 includes at least three support steel frames 12; all the support steel frames 12 are connected in sequence and form a regular polygon in the horizontal cross section; the telescopic component 3 is disposed at the center of the regular polygon.

[0022] As can be seen from the above description, by setting up a support frame 12 to form a regular polygonal support frame 1, and placing the telescopic component 3 at the center of the regular polygon, the telescopic component 3 is subjected to a uniform support force.

[0023] In one embodiment of this application, a ring deformation collector 4 is also included; the ring deformation collector 4 is used to be installed on the pre-embedded ring.

[0024] As described above, by adding the lifting ring deformation collector 4 and setting the lifting ring deformation collector 4 on the pre-embedded lifting ring, the elastic-plastic deformation value of the pre-embedded lifting ring under different stress conditions can be collected through the lifting ring deformation collector 4.

[0025] In one embodiment of this application, a displacement sensor 5 is also included; the displacement sensor 5 is used to be installed on the wall of the pre-embedded lifting ring.

[0026] As described above, by adding displacement sensor 5 and setting displacement sensor 5 on the wall where the pre-embedded lifting ring is installed, the deformation data of the wall after the pre-embedded lifting ring is subjected to force can be detected by displacement sensor 5.

[0027] Please refer to Figure 2 Another embodiment of the present invention provides a method for testing the bearing capacity of pre-embedded lifting rings in hydropower stations, applied to a pre-embedded lifting ring bearing capacity testing device for hydropower stations as described above, the method comprising: S1. Connect the support frame 1 to the wall structure with the pre-embedded lifting ring; S2. Connect the hook end of the loading hook 2 to the pre-embedded lifting ring; S3. Control the telescopic assembly 3 to tighten the loading hook 2; S4. Adjust the pulling force of the telescopic component 3 on the loading hook 2 according to the preset test conditions, and record the test results.

[0028] As described above, by connecting the support frame 1 to the wall of the pre-embedded lifting ring to support the entire device, the hook end of the loading hook 2 is connected to the pre-embedded lifting ring, and the pulling end of the loading hook 2 is connected to the moving end of the telescopic component 3. The telescopic component 3 is then controlled to tighten the loading hook 2. By controlling the telescopic component 3, the pulling force of the loading hook 2 on the pre-embedded lifting ring can be adjusted, and relevant data can be collected by sensors to evaluate the load-bearing capacity of the pre-embedded lifting ring, thereby improving the accuracy and safety of the load-bearing capacity detection of the pre-embedded lifting ring.

[0029] In one embodiment of this application, adjusting the pulling force of the telescopic component 3 on the loading hook 2 according to preset test conditions and recording the test results includes: The tension force of the telescopic component 3 on the loading hook 2 is adjusted in stages according to the preset loading level. When the target loading level is reached, loading data is collected and a constant load force model is constructed. Maintain the target loading level until a preset time threshold is reached, then unload the system and collect unloading data. Determine whether the unloading data conforms to the loading force model. If not, use the target loading level as the upper limit of the bearing capacity of the pre-embedded lifting ring. If yes, adjust the pulling force of the telescopic component 3 on the loading hook 2 at the next loading level until the target loading level reaches the test threshold.

[0030] As described above, by loading the pre-embedded lifting ring in stages, collecting loading data and constructing a constant load force model, and collecting unloading data after unloading, and by comparing the unloading data with the loading force model, if irreversible micro-plastic deformation occurs after unloading, then the current tensile force is considered to be the upper limit of the bearing capacity of the lifting ring, thus realizing the constant load detection and analysis of the bearing capacity of the pre-embedded lifting ring.

[0031] In one embodiment of this application, adjusting the pulling force of the telescopic component 3 on the loading hook 2 according to preset test conditions and recording the test results includes: Adjust the tension of the telescopic component 3 on the loading hook 2 to a preset multiple of the upper limit of the bearing capacity; Within a preset time period, the load-bearing capacity is gradually unloaded to the test threshold, and the first unloading data is collected to construct a dynamic load model; When the load-bearing capacity reaches the test threshold, the test threshold is held for a preset time before unloading, and second unloading data is collected. Determine whether the second unloading data conforms to the dynamic load model. If yes, output the upper limit value of the bearing capacity as the actual usage load limit; otherwise, modify the upper limit value of the bearing capacity.

[0032] As described above, by using a preset multiple of the upper limit of the bearing capacity as the initial value for the dynamic load test, the instantaneous overload state during the start-up of the hoisting and transportation of large components can be simulated. During the gradual unloading process, the first unloading data is collected to construct a dynamic load stress model, and the second unloading data is collected again after the bearing capacity reaches the test threshold. By comparing the second unloading data with the dynamic load stress model, it is determined that when irreversible plastic micro-deformation occurs in the lifting ring and the surrounding concrete after unloading, it indicates that the lifting ring does not have sufficient safety margin under the current bearing capacity condition, and the upper limit of the bearing capacity needs to be modified, thereby realizing the dynamic load detection and analysis of the bearing capacity of the embedded lifting ring.

[0033] Please refer to Figure 1 One embodiment of the present invention is as follows: A device for testing the load-bearing capacity of a pre-embedded lifting ring in a hydropower station includes a support frame 1, a loading hook 2, and a telescopic assembly 3. The support end of the support frame 1 is connected to the wall of the pre-embedded lifting ring. The fixed end of the telescopic assembly 3 is disposed on the support frame 1, and the movable end of the telescopic assembly 3 is away from the support end of the support frame 1. The hook end of the loading hook 2 is connected to the pre-embedded lifting ring, and the pulling end of the loading hook 2 is connected to the movable end of the telescopic assembly 3. A force sensor is disposed between the loading hook 2 and the telescopic assembly 3. The force sensor is used to collect the pull-out force value in real time and transmit the force signal to the testing device.

[0034] The telescopic assembly 3 includes a pressure cylinder 31, for example, a hydraulic jack is used as the telescopic assembly 3 in this embodiment; the fixed end of the pressure cylinder 31 is connected to the support frame 1; the piston rod 311 of the pressure cylinder 31 is connected to the pulling end of the loading hook 2. The telescopic assembly 3 also includes a pulling plate 32; the center of the pulling plate 32 is connected to the piston rod 311; the pulling end of the loading hook 2 is provided with at least two pulling leads 21; all the pulling leads 21 are evenly connected to the pulling plate 32 with the piston rod 311 as the center.

[0035] A central crossbar 11 is provided at one end of the support frame 1 away from the support end; the central crossbar 11 passes through the center point of the horizontal cross section of the support frame 1; the fixed end of the telescopic component 3 is provided on the central crossbar 11, and the movable end is located on the side away from the support end.

[0036] The support frame 1 includes at least three supporting steel frames 12; all the supporting steel frames 12 are connected in sequence and form a regular polygon in the horizontal cross-section; the telescopic component 3 is located at the center of the regular polygon. Figure 1 As shown, it includes four supporting steel frames 12 forming a regular square prism structure, and the hydraulic jack is set in the center position through the central crossbar 11.

[0037] This embodiment also includes a lifting ring deformation collector 4 and a displacement sensor 5. The lifting ring deformation collector 4 is installed on the pre-embedded lifting ring, and the displacement sensor 5 is installed on the wall of the pre-embedded lifting ring. Specifically, a set of lifting ring component deformation collectors is installed on both sides of the pre-embedded lifting ring. Each collector consists of a servo controller, an extensometer, and a deformation acquisition module. These collectors are used to collect the elastic-plastic deformation values ​​of the lifting ring under different stress conditions, as well as its residual deformation after unloading. The collectors are controlled by the servo controller and transmit the deformation values ​​of the lifting ring component itself to the detection and evaluation system through the deformation acquisition module, thereby determining whether the lifting ring component itself has reached its yield limit and produced irreversible residual deformation.

[0038] A concrete reinforcement detector is used to measure the concrete structure around the lifting ring, initially determining the size and location of the embedded components of the lifting ring. At least four displacement sensors 5 are evenly arranged around the embedded components to detect wall deformation, serving as a concrete structure deformation acquisition device. This device can also employ laser displacement sensors 5 or wire-type displacement sensors 5, with the sensor's detection end facing the anchorage of the embedded lifting ring, to collect real-time displacement data in all directions around the embedded lifting ring during stress. The installation height of the displacement sensors 5 is flush with the anchorage end of the embedded lifting ring to ensure the accuracy of the detection data.

[0039] The analysis and testing device is an industrial computer or embedded controller with built-in data processing software, capable of synchronously receiving, storing, and analyzing load data, wall displacement data, and lifting ring deformation data. It can automatically perform dead load and dynamic load analysis, and automatically generate a pre-embedded lifting ring bearing capacity test report and output the actual usage limits of the lifting ring based on preset bearing capacity judgment standards. In this embodiment, the bearing capacity pull-out device, concrete structure deformation acquisition device, lifting ring deformation acquisition device 4, and analysis and testing device constitute the pre-embedded lifting ring bearing capacity testing system. These components work together to achieve comprehensive testing of the pre-embedded lifting ring bearing capacity.

[0040] Please refer to Figure 2 Another embodiment of the present invention provides a method for detecting the bearing capacity of pre-embedded lifting rings in hydropower stations, applied to the aforementioned device for detecting the bearing capacity of pre-embedded lifting rings in hydropower stations. The method includes: S1. Connect the support frame 1 to the wall structure with the pre-embedded lifting ring.

[0041] S2. Connect the hook end of the loading hook 2 to the pre-embedded lifting ring.

[0042] S3. Control the telescopic assembly 3 to tighten the loading hook 2. That is, through S1-S3, connect the loading hook 2 of the load-bearing pull-out device to the pre-embedded lifting ring to be tested, install the support frame 1 legs on the wall, and adjust the telescopic legs of the support frame 1 so that the wire rope is in a taut state. Before testing, each data acquisition device also needs to be installed: S31. Installation of concrete deformation acquisition device: Use a concrete reinforcement detector to scan the concrete structure around the lifting ring to preliminarily determine the size and location of the embedded components of the lifting ring; evenly install displacement sensors 5 around the embedded lifting ring, and adjust the detection angle and distance of the sensors so that the sensors can accurately collect displacement data around the embedded lifting ring.

[0043] S32. Installation of the ring deformation collector 4: Install a set of ring deformation collectors 4 on both sides of the ring. The collectors can be fixed to the ring by rubber bands.

[0044] S33. Connect the tension sensor, displacement sensor 5, extensometer deformation acquisition sensor to the analysis and detection terminal, and reset all values ​​to zero.

[0045] S4. Calculate the test threshold of the embedded lifting ring. That is, before starting the test, it is necessary to calculate the test load-bearing capacity threshold: (1) Based on the diameter and material of the reinforcing bar of the lifting ring, estimate the theoretical yield strength of the lifting ring using the empirical formula for composition, that is: σ s =235+30×(C+Mn / 6)+10×Si, where C, Mn, and Si are the mass fractions (%) of carbon, manganese, and silicon, respectively; 235 is the basic strength unit (MPa, corresponding to the theoretical yield strength of Q235 steel reinforcement); σ s This represents the theoretical yield strength.

[0046] (2) The theoretical yield strength multiplied by the safety margin factor of 0.6 is used as the test threshold L1 for the bearing capacity of the lifting ring.

[0047] S5. Gradually adjust the tension force of the telescopic component on the loading hook to verify the test threshold. This involves performing a constant load capacity test and analysis: The tension force of the telescopic component 3 on the loading hook 2 is adjusted sequentially at preset load levels. When the target load level is reached, loading data is collected and a constant load force model is constructed. The target load level is maintained until a preset time threshold is reached, then unloading is performed, and unloading data is collected. It is determined whether the unloading data conforms to the loading force model. If not, the target load level is used as the upper limit of the load capacity of the embedded lifting ring. If yes, the tension force of the telescopic component 3 on the loading hook 2 is adjusted at the next load level until the target load level reaches the test threshold.

[0048] For example, perform the following steps in a specific test scenario: S51. Set the initial values ​​of each test sensor to zero and input the load-bearing capacity test threshold L1.

[0049] S52. Apply load in stages, with each load level being 0.1 MPa, and maintain a constant load for 5 minutes.

[0050] S53. Collect data on the deformation of the concrete structure and the lifting ring structure under loading conditions, and construct the tension-lifting ring structure deformation and tension-concrete structure deformation curve model diagrams respectively to obtain the loading force model.

[0051] S54. After 5 minutes of constant load, unload the load and collect data on the deformation of the concrete structure and the lifting ring structure under the unloading condition. Obtain the unloading data and observe whether there is any irreversible micro-plastic deformation.

[0052] S55. If irreversible micro-plastic deformation occurs in the concrete structure or lifting ring structure, the current tensile force shall be taken as the upper limit value L of the bearing capacity of the lifting ring. max Otherwise, continue loading and repeat test steps (1.2)-(1.4) until the test load capacity reaches L1.

[0053] S6. Adjust the tension force of the telescopic component on the loading hook through dynamic load test conditions to verify the short-term overload condition, i.e., perform dynamic load detection and analysis of bearing capacity: adjust the tension force of the telescopic component 3 on the loading hook 2 to a preset multiple of the upper limit of the bearing capacity; gradually unload the bearing capacity to the test threshold within a preset time and collect the first unloading data to construct a dynamic load force model; when the bearing capacity reaches the test threshold, maintain the test threshold (i.e., constant load) for a preset time before unloading and collect the second unloading data; determine whether the second unloading data conforms to the dynamic load force model. If yes, output the upper limit of the bearing capacity as the actual use load limit; if not, modify the upper limit of the bearing capacity.

[0054] For example, perform the following steps in a specific test scenario: S61, using the test load-bearing capacity upper limit value L max 1.5 times the theoretical yield strength σ s The initial value of the dynamic load test was 0.9 times the value of the lifting ring structure. This simulated the instantaneous overload state when the large component was lifted and transported. The load was then steadily unloaded to L1. Data on the deformation of the concrete structure and the lifting ring structure under the overload state were collected. The tension-lifting ring structure deformation and tension-concrete structure deformation curve models were constructed to obtain the dynamic load model.

[0055] S62. After the test bearing capacity recovers to L1, maintain constant load for 5 minutes, then unload and collect data on the deformation of the concrete structure and the lifting ring structure under the unloading condition, i.e., collect the second unloading data, and observe whether there is any irreversible plastic micro-deformation.

[0056] S63. If, after unloading, the lifting ring and surrounding concrete structure undergo elastic deformation (returning to their original state after unloading), and the current test bearing capacity upper limit value L is output... max This serves as the actual load limit for the lifting ring. If, after unloading, irreversible micro-plastic deformation occurs in the lifting ring and surrounding concrete, it indicates that the lifting ring does not have sufficient safety margin under the current load-bearing conditions, and the upper limit of the tested load-bearing capacity L needs to be increased. max Divide by 1.5 (i.e., the theoretical yield strength σ) s The actual load limit for the lifting ring is 0.4 times the rated load.

[0057] Based on the test data, an inspection report is automatically generated. The report includes the inspection time, information on the embedded lifting rings, pull-out force data, displacement data, pull-out force-displacement curve, and the actual service load limit determination result.

[0058] In summary, this invention discloses a device and method for detecting the bearing capacity of embedded lifting rings in hydropower stations. The bearing capacity detection device, along with a concrete structure deformation acquisition device, a lifting ring deformation acquisition device, and an analysis and detection device, constitutes an embedded lifting ring bearing capacity detection system. This system can collect stress-strain information of the embedded lifting ring and the deformation of the surrounding concrete in real time under different tensile conditions during graded loading. By combining the pull-out force data, a stress-deformation relationship model of the lifting ring is established, and the bearing capacity detection results are automatically determined, achieving accurate and safe detection of the embedded lifting ring bearing capacity. It also has the following advantages: (1) Comprehensive testing dimensions: High-precision sensors are used to evaluate the bearing capacity of the embedded lifting ring from two testing dimensions: the deformation of the lifting ring itself and the deformation of the embedded concrete structure. This solves the problem that the deformation of components and structures can only be identified by the naked eye in the traditional lifting ring pull-out test, thus improving the reliability of the test results.

[0059] (2) High safety: The upper limit of the load-bearing capacity of the lifting ring is gradually confirmed by theoretical calculation and step loading. The dynamic load test is used to simulate the short-term overload condition in actual use, which effectively verifies the safety margin of the test load limit value and further enhances the safety of the lifting ring in actual use projects.

[0060] (3) High data accuracy: The displacement sensor collects the minute displacements around the pre-embedded lifting ring in real time, and combined with the pull-out force data of the force sensor, it can accurately reflect the stress deformation characteristics of the pre-embedded lifting ring, and provide comprehensive data support for the safety assessment of the pre-embedded lifting ring.

[0061] (4) High degree of automation: The data acquisition module and the processing terminal are seamlessly connected, automatically completing data acquisition, analysis and report generation, reducing manual intervention and improving detection efficiency.

[0062] (5) Wide range of applications: It can be applied to the detection of various embedded lifting rings in fields such as construction, fire protection, and geotechnical engineering. The sensor installation method is flexible and can adapt to the detection needs of embedded lifting rings in different scenarios.

[0063] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A device for testing the bearing capacity of pre-embedded lifting rings in hydropower stations, characterized in that, Includes support frame, loading hook, and telescopic assembly; The support end of the support frame is used to connect with the wall with the pre-embedded lifting ring; The fixed end of the telescopic component is disposed on the support frame, and the moving end of the telescopic component is away from the supporting end of the support frame. The hook end of the loading hook is used to connect with the pre-embedded lifting ring, and the pulling end of the loading hook is connected to the moving end of the telescopic component; A force sensor is installed between the loading hook and the telescopic assembly.

2. The device for detecting the bearing capacity of a pre-embedded lifting ring in a hydropower station according to claim 1, characterized in that, The telescopic assembly includes a pressure cylinder; The fixed end of the pressure cylinder is connected to the support frame; The piston rod of the pressure cylinder is connected to the pulling end of the loading hook.

3. The device for detecting the bearing capacity of a pre-embedded lifting ring in a hydropower station according to claim 2, characterized in that, The telescopic assembly also includes a tension plate; The center of the traction plate is connected to the piston rod; The pulling end of the loading hook is provided with at least two pulling leads; All the aforementioned traction leads are uniformly connected to the traction plate with the piston rod as the center.

4. The device for detecting the bearing capacity of a pre-embedded lifting ring in a hydropower station according to claim 2, characterized in that, A central crossbar is provided at the end of the support frame away from the support end; The central crossbar passes through the center point of the horizontal cross section of the support frame; The fixed end of the telescopic component is located on the central crossbar, and the movable end is located away from the supporting end.

5. The device for detecting the bearing capacity of a pre-embedded lifting ring in a hydropower station according to claim 1, characterized in that, The support frame includes at least three supporting steel frames; All the aforementioned supporting steel frames are connected in sequence, and their cross-section in the horizontal direction forms a regular polygon; The telescopic component is located at the center of the regular polygon.

6. The device for detecting the bearing capacity of a pre-embedded lifting ring in a hydropower station according to claim 1, characterized in that, It also includes a ring deformation collector; The ring deformation collector is used to be installed on the pre-embedded ring.

7. The device for detecting the bearing capacity of a pre-embedded lifting ring in a hydropower station according to claim 1, characterized in that, It also includes displacement sensors; The displacement sensor is used to install on the wall of the pre-embedded lifting ring.

8. A method for testing the bearing capacity of pre-embedded lifting rings in hydropower stations, characterized in that, The method for using a hydropower station pre-embedded lifting ring bearing capacity testing device as described in any one of claims 1-7 includes: Connect the support frame to the wall structure with the pre-embedded lifting ring; Connect the hook end of the loading hook to the pre-embedded lifting ring; The telescopic assembly is controlled to tighten the loading hook; Calculate the test threshold of the pre-embedded lifting ring; The test threshold is verified by gradually adjusting the tension force of the telescopic component on the loading hook. The short-term overload condition was verified by adjusting the pulling force of the telescopic component on the loading hook under dynamic load test conditions.

9. A device for detecting the bearing capacity of a pre-embedded lifting ring in a hydropower station according to claim 8, characterized in that, The stepwise adjustment of the tension force of the telescopic component on the loading hook to verify the test threshold includes: The tension force of the telescopic component on the loading hook is adjusted in stages according to the preset loading level. When the target loading level is reached, loading data is collected and a constant load force model is constructed. Maintain the target loading level until a preset time threshold is reached, then unload the system and collect unloading data. Determine whether the unloading data conforms to the loading force model. If not, use the target loading level as the upper limit of the bearing capacity of the pre-embedded lifting ring. If yes, adjust the tension of the telescopic component on the loading hook at the next loading level until the target loading level reaches the test threshold.

10. A device for detecting the bearing capacity of a pre-embedded lifting ring in a hydropower station according to claim 9, characterized in that, The step of adjusting the tension force of the telescopic assembly on the loading hook through dynamic load test conditions to verify the short-term overload condition includes: Adjust the telescopic component to exert a pulling force on the loading hook to a preset multiple of the upper limit of the bearing capacity; Within a preset time period, the load-bearing capacity is gradually unloaded to the test threshold, and the first unloading data is collected to construct a dynamic load model; When the load-bearing capacity reaches the test threshold, the test threshold is held for a preset time before unloading, and second unloading data is collected. Determine whether the second unloading data conforms to the dynamic load model. If yes, output the upper limit value of the bearing capacity as the actual usage load limit; otherwise, modify the upper limit value of the bearing capacity.

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