Foundation pit support anchor rod tension testing device
Patent Information
- Application Number
- CN202522375259.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-11-07
AI Technical Summary
[0005]本实用新型的目的在于提供一种基坑支护锚杆拉力测试装置，以解决上述背景技术中现有拉力测试牵引机，对于锚杆杆体内部的微裂纹、夹渣，或锚杆与注浆体的局部脱粘等隐性缺陷，需依赖测试前的人工预检，如目视、简单敲击等进行检测，存在漏检风险的问题
[0016]第一、本实用新型通过将锚杆放入拉伸测试机构的内部，在通过拉伸测试机构对锚杆测试前开启内嵌式驱动电机，通过内嵌式驱动电机的输出轴带动往复丝杆进行转动，通过往复丝杆的转动从而带动滚珠螺母副连接的螺纹块进行移动，通过螺纹块的移动进而带动连接环进行移动，连接环通过多个弹簧从而带动磁环在锚杆的表面进行往复移动，且在移动过程中，通过磁性检测器持续的监测磁环，通过上述技术方案，通过磁性检测器监测磁环的晃动，铁磁性材质锚杆在无缺陷时，其周围的磁场分布相对均匀，当存在表面缺陷，如裂纹、凹坑时，缺陷处的磁导率、电导率会发生变化，导致磁场出现局部畸变，如磁场强度骤增、磁场方向偏转，通过移动磁环在穿过畸变区域时，会因电磁力的变化产生机械响应，表现为轻微的晃动、振动或位置偏移，同时通过往复丝杆带动螺纹块实现磁环的往复移动，可确保监测范围覆盖锚杆全长，避免传统固定点位监测的漏检问题，弹簧连接磁环适应锚杆表面的圆度偏差或安装微量晃动，维持磁环与锚杆间的最佳检测间隙，保障磁场信号的稳定性。
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Figure CN224906491U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anchor bolt tension testing technology, specifically to a foundation pit support anchor bolt tension testing device. Background Technology
[0002] Anchor bolts are support components used in geotechnical engineering to reinforce structures such as slopes, foundation pits, and tunnels. They are usually made of metal rods, such as threaded steel bars or steel strands, and are fixed inside the soil and rock layers by grouting or mechanical anchoring. They can transfer the lateral pressure of the soil and rock mass to the stable strata and prevent structural instability.
[0003] The tensile testing traction machine is the core equipment for testing the anchoring performance of anchor bolts. It is connected to the exposed end of the anchor bolt through a hydraulic or mechanical transmission system, and applies a controllable axial tensile force. Combined with load, displacement and other monitoring modules, it obtains key parameters such as the pull-out bearing capacity and displacement characteristics of the anchor bolt, and verifies whether the anchor bolt meets the design safety requirements.
[0004] Existing tensile testing traction machines require manual pre-testing, such as visual inspection or simple tapping, to detect hidden defects such as micro-cracks, slag inclusions, or localized debonding between the anchor bolt and the grouting body inside the anchor bolt, which carries the risk of missing detections. Utility Model Content
[0005] The purpose of this utility model is to provide a tensile testing device for foundation pit support anchor bolts, so as to solve the problem that the existing tensile testing traction machine in the above-mentioned background technology requires manual pre-inspection before testing for hidden defects such as micro-cracks, slag inclusions, or local debonding between the anchor bolt and the grouting body. Such inspections are carried out by visual inspection or simple tapping, which poses a risk of missed detection.
[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a tensile testing device for foundation pit support anchor bolts, including a tensile testing mechanism and a magnetic detector, wherein the tensile testing mechanism is provided with auxiliary components and a buoyancy component;
[0007] The auxiliary component includes a reciprocating lead screw, which is rotatably embedded inside the tensile testing mechanism. The reciprocating lead screw ball nut pair is connected to a threaded block. A connecting ring is fixedly connected to one side of the outer surface of the threaded block, and multiple springs are fixedly connected to one side of the outer surface of the connecting ring. A magnetic ring is fixedly connected to one side of the outer surface of each of the multiple springs.
[0008] The blowing assembly includes an air cylinder, and a slide rod is slidably embedded inside the air cylinder in a vertical direction. A connecting block is fixedly connected to one side of the outer surface of the threaded block, and one side of the outer surface of the connecting block is fixedly connected to the slide rod. An annular nozzle is fixedly connected to one side of the outer surface of the connecting ring.
[0009] Preferably, a limiting rod is fixedly connected to one side of the outer surface of the tensile testing mechanism, and a limiting block is fixedly connected to one side of the outer surface of the limiting rod.
[0010] Preferably, the reciprocating lead screw is rotatably embedded inside the limiting block, and the threaded block is slidably sleeved on the outer surface of the limiting rod in a vertical direction.
[0011] Preferably, a piston is fixedly connected to one side of the outer surface of the slide rod, and the piston is slidably embedded inside the air cylinder in a vertical direction.
[0012] Preferably, an air inlet pipe is fixedly connected to the outer surface of the air cylinder, and a one-way valve is provided inside the air inlet pipe.
[0013] Preferably, the air cylinder is provided with an air delivery pipe inside, and the end of the air delivery pipe away from the air cylinder is located inside the annular nozzle.
[0014] Preferably, the tensile testing mechanism is equipped with an embedded drive motor, and the output shaft of the embedded drive motor is fixedly connected to the reciprocating lead screw.
[0015] Compared with the prior art, the beneficial effects achieved by this utility model are:
[0016] First, this utility model places the anchor rod inside a tensile testing mechanism. Before testing the anchor rod, the embedded drive motor is activated. The output shaft of the embedded drive motor drives a reciprocating screw to rotate. The rotation of the reciprocating screw moves the threaded block connected to the ball nut assembly. The movement of the threaded block moves the connecting ring. The connecting ring, through multiple springs, moves the magnetic ring reciprocally across the surface of the anchor rod. During this movement, a magnetic detector continuously monitors the magnetic ring. Through the above technical solution, the magnetic detector monitors the swaying of the magnetic ring. When the ferromagnetic anchor rod is defect-free, the magnetic field around it... The magnetic ring is relatively uniformly distributed. When surface defects such as cracks or pits are present, the magnetic permeability and conductivity at the defect locations will change, causing local distortion of the magnetic field, such as a sudden increase in magnetic field strength or a deflection of the magnetic field direction. When the moving magnetic ring passes through the distorted area, it will generate a mechanical response due to the change in electromagnetic force, which manifests as slight shaking, vibration, or positional displacement. At the same time, the reciprocating screw drives the threaded block to achieve the reciprocating movement of the magnetic ring, which can ensure that the monitoring range covers the entire length of the anchor rod and avoid the missed detection problem of traditional fixed-point monitoring. The spring-connected magnetic ring adapts to the roundness deviation of the anchor rod surface or the slight shaking during installation, maintaining the optimal detection gap between the magnetic ring and the anchor rod and ensuring the stability of the magnetic field signal.
[0017] Secondly, in this invention, during the movement of the magnetic ring driven by the threaded block, the connecting block connected to the threaded block drives the slide rod to move vertically. The movement of the slide rod causes the piston to slide inside the air cylinder. The piston compresses the space inside the air cylinder, thereby delivering the gas inside the air cylinder to the annular nozzle through the air delivery pipe. Then, the annular nozzle blows the gas onto the surface of the anchor rod. Through the above technical solution, the annular nozzle cleans the debris residue on the surface of the anchor rod. The air pressure is dynamically adjusted according to the moving speed of the threaded block. It can blow away light debris such as dust and oil stains without damaging the surface of the anchor rod or the magnetic ring. The annular nozzle removes debris from the surface of the anchor rod, avoiding the problem of false magnetic field distortion caused by debris. It ensures that the magnetic field signal captured by the magnetic ring only reflects the defects of the anchor rod itself, such as internal cracks and slag inclusions, thus improving the authenticity of the monitoring data. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0019] Figure 2 This is one of the three-dimensional structural schematic diagrams of this utility model;
[0020] Figure 3 This utility model Figure 2 Enlarged 3D structural diagram at point A in the middle;
[0021] Figure 4 This is a second three-dimensional structural schematic diagram of this utility model.
[0022] The components include: 1. Tensile testing mechanism; 2. Magnetic detector; 3. Reciprocating lead screw; 301. Limiting rod; 302. Limiting block; 303. Threaded block; 304. Connecting block; 305. Connecting ring; 4. Magnetic ring; 401. Spring; 5. Air cylinder; 501. Air inlet pipe; 502. One-way valve; 6. Slide rod; 601. Piston; 602. Air delivery pipe; 603. Annular nozzle; 7. Embedded drive motor. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0024] Please see Figures 1-4 A tensile testing device for foundation pit support anchor bolts includes a tensile testing mechanism 1 and a magnetic detector 2. The tensile testing mechanism 1 is equipped with auxiliary components and a buoyancy component.
[0025] The auxiliary components include a reciprocating screw 3, which is rotatably embedded inside the tensile testing mechanism 1. The reciprocating screw 3 is connected to a threaded block 303 by a ball nut pair. A connecting ring 305 is fixedly connected to one side of the outer surface of the threaded block 303. Multiple springs 401 are fixedly connected to one side of the outer surface of the connecting ring 305. A magnetic ring 4 is fixedly connected to one side of the outer surface of each of the multiple springs 401.
[0026] The blowing assembly includes an air cylinder 5, and a slide rod 6 is slidably embedded inside the air cylinder 5 in a vertical direction. A connecting block 304 is fixedly connected to one side of the outer surface of the threaded block 303, and one side of the outer surface of the connecting block 304 is fixedly connected to the slide rod 6. An annular nozzle 603 is fixedly connected to one side of the outer surface of the connecting ring 305.
[0027] Through the above technical solution, the anchor rod is placed inside the tensile testing mechanism 1. Before testing the anchor rod through the tensile testing mechanism 1, the embedded drive motor 7 is turned on. The output shaft of the embedded drive motor 7 drives the reciprocating screw 3 to rotate. The rotation of the reciprocating screw 3 drives the threaded block 303 connected to the ball nut pair to move. The movement of the threaded block 303 drives the connecting ring 305 to move. The connecting ring 305 drives the magnetic ring 4 to reciprocate on the surface of the anchor rod through multiple springs 401. During the movement, the magnetic detector 2 continuously monitors the magnetic ring 4. Through the above technical solution, the magnetic detector 2 monitors the shaking of the magnetic ring 4. The ferromagnetic material anchor rod is defect-free. When the magnetic field around the anchor rod is relatively uniform, the magnetic permeability and conductivity at the defect location will change, causing local distortion of the magnetic field, such as a sudden increase in magnetic field strength or a deflection of magnetic field direction. When the moving magnetic ring 4 passes through the distorted area, it will generate a mechanical response due to the change in electromagnetic force, which manifests as slight shaking, vibration or positional displacement. At the same time, the reciprocating screw 3 drives the threaded block 303 to realize the reciprocating movement of the magnetic ring 4, which can ensure that the monitoring range covers the entire length of the anchor rod and avoid the missed detection problem of traditional fixed point monitoring. The spring 401 connects the magnetic ring 4 to adapt to the roundness deviation of the anchor rod surface or the slight shaking during installation, maintains the optimal detection gap between the magnetic ring 4 and the anchor rod, and ensures the stability of the magnetic field signal.
[0028] Through the above technical solution, during the movement of the magnetic ring 4 driven by the threaded block 303, the connecting block 304 connected to the threaded block 303 drives the slide rod 6 to move vertically. The movement of the slide rod 6 drives the piston 601 to slide inside the air cylinder 5. The piston 601 compresses the space inside the air cylinder 5, thereby delivering the gas inside the air cylinder 5 to the annular nozzle 603 through the air delivery pipe 602. Then, the gas is blown onto the surface of the anchor rod by the annular nozzle 603. Through the above technical solution, the air blown by the annular nozzle 603 cleans the debris residue on the surface of the anchor rod. The air pressure is dynamically adjusted with the moving speed of the threaded block 303, which can blow away light debris such as dust and oil stains without damaging the surface of the anchor rod or the magnetic ring 4. The annular nozzle 603 blows away the debris on the surface of the anchor rod, avoiding the problem of false magnetic field distortion caused by debris, and ensuring that the magnetic field signal captured by the magnetic ring 4 only reflects the defects of the anchor rod itself, such as internal cracks and slag inclusions, thus improving the authenticity of the monitoring data.
[0029] Specifically, a limiting rod 301 is fixedly connected to one side of the outer surface of the tensile testing mechanism 1, and a limiting block 302 is fixedly connected to one side of the outer surface of the limiting rod 301.
[0030] Through the above technical solution, the limiting rod 301 and the limiting block 302 are fixedly connected.
[0031] Specifically, the reciprocating lead screw 3 is rotatably embedded inside the limiting block 302, and the threaded block 303 is slidably sleeved on the outer surface of the limiting rod 301 in a vertical direction.
[0032] The above technical solution limits the threaded block 303 by means of the limiting rod 301.
[0033] Specifically, a piston 601 is fixedly connected to one side of the outer surface of the slide rod 6, and the piston 601 is slidably embedded in the air cylinder 5 in a vertical direction.
[0034] The above technical solution uses piston 601 to compress the space inside cylinder 5.
[0035] Specifically, an air inlet pipe 501 is fixedly connected to the outer surface of the air cylinder 5, and a one-way valve 502 is installed inside the air inlet pipe 501.
[0036] The above technical solution allows air to enter through the intake pipe 501 and prevents backflow of gas through the one-way valve 502.
[0037] Specifically, the air cylinder 5 is equipped with an air supply pipe 602, and the end of the air supply pipe 602 away from the air cylinder 5 is located inside the annular nozzle 603.
[0038] Through the above technical solution, the gas inside the air cylinder 5 is delivered to the annular nozzle 603 through the air delivery pipe 602, and then blown onto the surface of the anchor rod through the annular nozzle 603.
[0039] Specifically, the tensile testing mechanism 1 is equipped with an embedded drive motor 7, and the output shaft of the embedded drive motor 7 is fixedly connected to the reciprocating lead screw 3.
[0040] Through the above technical solution, the output shaft of the embedded drive motor 7 drives the reciprocating lead screw 3 to rotate.
[0041] In use, the anchor rod is placed inside the tensile testing mechanism 1. Before testing the anchor rod through the tensile testing mechanism 1, the embedded drive motor 7 is turned on. The output shaft of the embedded drive motor 7 drives the reciprocating screw 3 to rotate. The rotation of the reciprocating screw 3 drives the threaded block 303 connected to the ball nut pair to move. The movement of the threaded block 303 drives the connecting ring 305 to move. The connecting ring 305, through multiple springs 401, drives the magnetic ring 4 to reciprocate on the surface of the anchor rod. During the movement, the magnetic detector 2 continuously monitors the magnetic ring 4. Through the above technical solution, the magnetic detector 2 monitors the shaking of the magnetic ring 4. When the ferromagnetic anchor rod is defect-free, The magnetic field distribution around it is relatively uniform. When there are surface defects, such as cracks or pits, the magnetic permeability and conductivity at the defect will change, causing local distortion of the magnetic field, such as a sudden increase in magnetic field strength or a deflection of magnetic field direction. When the moving magnetic ring 4 passes through the distorted area, it will produce a mechanical response due to the change in electromagnetic force, which manifests as slight shaking, vibration or positional displacement. At the same time, the reciprocating screw 3 drives the threaded block 303 to realize the reciprocating movement of the magnetic ring 4, which can ensure that the monitoring range covers the entire length of the anchor rod and avoid the missed detection problem of traditional fixed point monitoring. The spring 401 connects the magnetic ring 4 to adapt to the roundness deviation of the anchor rod surface or the slight shaking during installation, maintain the optimal detection gap between the magnetic ring 4 and the anchor rod, and ensure the stability of the magnetic field signal.
[0042] During the movement of the magnetic ring 4 driven by the threaded block 303, the connecting block 304 connected to the threaded block 303 drives the slide rod 6 to move vertically. The movement of the slide rod 6 causes the piston 601 to slide inside the air cylinder 5. The piston 601 compresses the space inside the air cylinder 5, thereby delivering the gas inside the air cylinder 5 to the annular nozzle 603 through the air delivery pipe 602. Then, the gas is blown onto the surface of the anchor rod by the annular nozzle 603. Through the above technical solution, the air nozzle 603 cleans the debris residue on the surface of the anchor rod. The air pressure is dynamically adjusted with the moving speed of the threaded block 303, which can blow away light debris such as dust and oil stains without damaging the surface of the anchor rod or the magnetic ring 4. The annular nozzle 603 blows away the debris on the surface of the anchor rod, avoiding the problem of false magnetic field distortion caused by debris, and ensuring that the magnetic field signal captured by the magnetic ring 4 only reflects the defects of the anchor rod itself, such as internal cracks and slag inclusions, thus improving the authenticity of the monitoring data.
[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A tensile testing device for foundation pit support anchor bolts, comprising a tensile testing mechanism (1) and a magnetic detector (2), characterized in that: The tensile testing mechanism (1) is equipped with auxiliary components inside, and the tensile testing mechanism (1) is equipped with a blowing component inside; The auxiliary component includes a reciprocating screw (3), which is rotatably embedded inside the tensile testing mechanism (1). The reciprocating screw (3) is connected to a threaded block (303) with a ball nut pair. A connecting ring (305) is fixedly connected to one side of the outer surface of the threaded block (303), and multiple springs (401) are fixedly connected to one side of the outer surface of the connecting ring (305). A magnetic ring (4) is fixedly connected to one side of the outer surface of each of the multiple springs (401). The blowing assembly includes an air cylinder (5), and a slide rod (6) is slidably embedded inside the air cylinder (5) in a vertical direction. A connecting block (304) is fixedly connected to one side of the outer surface of the threaded block (303), and one side of the outer surface of the connecting block (304) is fixedly connected to the slide rod (6). An annular nozzle (603) is fixedly connected to one side of the outer surface of the connecting ring (305).
2. The foundation pit support anchor bolt tension testing device according to claim 1, characterized in that: A limiting rod (301) is fixedly connected to one side of the outer surface of the tensile testing mechanism (1), and a limiting block (302) is fixedly connected to one side of the outer surface of the limiting rod (301).
3. The foundation pit support anchor bolt tension testing device according to claim 2, characterized in that: The reciprocating lead screw (3) is rotatably embedded inside the limiting block (302), and the threaded block (303) is slidably sleeved on the outer surface of the limiting rod (301) in a vertical direction.
4. The foundation pit support anchor bolt tension testing device according to claim 1, characterized in that: A piston (601) is fixedly connected to one side of the outer surface of the slide rod (6), and the piston (601) is slidably embedded in the air cylinder (5) in a vertical direction.
5. The foundation pit support anchor bolt tension testing device according to claim 1, characterized in that: An air inlet pipe (501) is fixedly connected to the outer surface of the air cylinder (5), and a one-way valve (502) is provided inside the air inlet pipe (501).
6. The foundation pit support anchor bolt tension testing device according to claim 1, characterized in that: The air cylinder (5) is provided with an air supply pipe (602) inside, and the end of the air supply pipe (602) away from the air cylinder (5) is located inside the annular nozzle (603).
7. The foundation pit support anchor bolt tension testing device according to claim 1, characterized in that: The tensile testing mechanism (1) is equipped with an embedded drive motor (7), and the output shaft of the embedded drive motor (7) is fixedly connected to the reciprocating lead screw (3).