Bridge structure stress-strain monitoring device
By automating the fixing and bending of steel bars using mechanical structures, the problem of high labor intensity caused by manual bending of steel bars in existing technologies has been solved, enabling efficient and accurate detection of stress and strain in bridge structures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN ZHIXIN TRANSPORTATION TECH CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-05-26
AI Technical Summary
In existing technologies, steel bar strain testing requires workers to manually bend the steel bars, resulting in high workload and making it impossible to achieve continuous and efficient testing.
The mechanical structure uses a motor-driven screw and V-shaped plate to automatically fix and bend steel bars, and combines an electric telescopic rod and a semi-circular block to achieve precise extrusion and automated strain detection.
It improves detection accuracy and reliability, reduces manpower consumption, ensures data accuracy and repeatability, and simplifies the maintenance process.
Smart Images
Figure CN224286571U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing equipment technology, specifically a stress-strain monitoring device for bridge structures. Background Technology
[0002] Steel bars in bridge structures are the core component of reinforced concrete or prestressed concrete bridges. By working together with concrete, they significantly improve the load-bearing capacity, crack resistance, and durability of bridges. As a key internal component of bridge structures, the stress and strain data of steel bars are an important basis for assessing the health status of the structure.
[0003] Existing technologies for stress and strain testing of reinforcing bars first use a flap grinder to polish the surface of the reinforcing bars to ensure flatness. Dry and wet disinfectant wipes are then used to clean the surface, ensuring a dust-free and pollution-free environment for strain gauge adhesion. 101 glue, electrical tape, AB glue, silicone, and gauze are then used to adhere and fix the strain gauges, and the resistance value of the strain gauges is measured. Subsequently, the data cable is connected to the SG04 device, and the operator holds both ends of the reinforcing bar and performs a bending test to achieve micro-strain testing. However, existing technologies require manual bending of the reinforcing bars for strain testing. When a large number of reinforcing bars need to be tested, this significantly increases the workload for the operator, making it impossible to achieve continuous and efficient strain testing and causing inconvenience for the operator.
[0004] A stress-strain monitoring device for bridge structures is proposed to address the problems mentioned above. Utility Model Content
[0005] The purpose of this invention is to provide a bridge structure stress-strain monitoring device to solve the problems mentioned in the background art. Currently, the process involves grinding the surface of reinforcing bars with a flap wheel grinder to ensure flatness, cleaning the surface with dry and wet disinfectant cotton pads, and then using 101 glue, electrical tape, AB glue, silicone, and gauze to attach and fix strain gauges, measuring the resistance value of the strain gauges, and then connecting the data cable to the SG04 device. The operator then holds both ends of the reinforcing bar and performs a bending test. However, in the prior art, strain testing of reinforcing bars requires manual bending, which greatly increases the workload when testing a large number of reinforcing bars, making it impossible to achieve continuous and efficient strain monitoring.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a bridge structure stress and strain monitoring device, including a workbench, a back plate fixedly installed on one side of the top of the workbench, and support legs symmetrically fixedly installed on the bottom of the back plate; an adjustment mechanism is provided between the workbench and the back plate, and a fixing component is provided inside the adjustment mechanism;
[0007] The adjustment mechanism includes a sliding groove inside the workbench, with support plates symmetrically fixedly connected to the bottom of the workbench. A first threaded block is slidably connected inside the sliding groove, and a first bidirectional screw is rotatably connected between the support plates. The first threaded block is located outside the first bidirectional screw and threadedly connected to it. A first forward / reverse motor is fixedly connected to one end of the first bidirectional screw, and a first V-shaped plate is fixedly installed on the top of the first threaded block. A sliding box is located on one side of the front of the back plate, and a second bidirectional screw is rotatably connected inside the sliding box. A second forward / reverse motor is fixedly installed at one end of the second bidirectional screw, and second threaded blocks are symmetrically threaded to the outer ends of both ends of the second bidirectional screw. A second V-shaped plate is fixedly installed at the bottom of the second threaded block, and a first electric telescopic rod is fixedly installed on the inner top of the back plate.
[0008] Preferably, a fixing plate is fixedly connected to one side of the front of the workbench, and a second electric telescopic rod is fixedly connected to one side of the fixing plate, and a semi-circular block is provided at the output end of the second electric telescopic rod.
[0009] Preferably, the top of the sliding box is symmetrically and fixedly connected with guide rods, and the top of the guide rods penetrates through the back plate and is slidably connected to the back plate, and the top of the guide rods is fixedly connected with a stop block.
[0010] Preferably, the fixing component includes a positioning plate fixedly installed on one side of the semicircular block, and an insert plate is fixedly connected to the output end of the second electric telescopic rod. The insert plate and the positioning plate are interlocked. A limit box is symmetrically fixedly connected to one side of the positioning plate. A threaded tube is fixedly connected inside the limit box. A threaded rod is threadedly connected inside the threaded tube. A push plate is rotatably connected to one end of the threaded rod. Insert blocks are welded to the side of the push plate away from the threaded rod. Slots are symmetrically opened on both sides of the insert plate. The insert blocks are interlocked with the slots.
[0011] Preferably, the top of the workbench is symmetrically provided with limiting grooves, and the two sides of the positioning plate are symmetrically fixedly connected with limiting blocks, and the bottom of the limiting blocks is disposed inside the limiting grooves and slidably connected to the limiting grooves.
[0012] Preferably, a rotating block is fixedly connected to the end of the threaded rod away from the limiting box.
[0013] Preferably, the output end of the first electric telescopic rod is fixedly connected to the sliding box.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: A bridge structure stress-strain monitoring device is described, specifically: The operation of a first forward and reverse motor drives the rotation of a first bidirectional screw, which in turn moves two sets of first threaded blocks. The movement of the first threaded blocks moves a first V-shaped plate. A second forward and reverse motor drives the rotation of a second bidirectional screw, which in turn moves a second threaded block. The movement of the second threaded block moves a second V-shaped plate. The operation of a first electric telescopic rod causes the sliding box to move downwards. At this time, the inner rubber pads of the first and second V-shaped plates are compressed and deformed. The operation of the second electric telescopic rod causes a semi-circular block to compress the center of the reinforcing steel, thereby enabling rapid monitoring of the reinforcing steel in the bridge structure. This strain testing system can effectively fix rebars of various lengths. Compared to the traditional method of manually bending rebars, it can precisely fix the rebar position, greatly improving testing accuracy and avoiding data deviations caused by rebar swaying or displacement. The mechanical push structure achieves uniform and stable force application, ensuring consistent rebar bending and enhancing the repeatability and reliability of test results. This provides a solid guarantee for accurately assessing the stress-strain performance of rebars while saving a significant amount of manpower. By having workers rotate two sets of threaded rods inside the threaded tube, the rotation of the threaded rods drives the push plate to slide inside the limit box. The movement of the push plate causes multiple sets of inserts to engage with the slots, thus achieving the effect of quickly fixing the limit inserts. This facilitates the maintenance and replacement of the semicircular blocks, greatly improving the daily maintenance efficiency of the device.
[0015] 1. The operator drives the first and second forward / reverse motors via a controller. The first forward / reverse motor rotates the first bidirectional screw, which in turn moves two sets of first threaded blocks. This movement of the first threaded blocks then moves the first V-shaped plate. The second forward / reverse motor rotates the second bidirectional screw, which in turn moves the second threaded block. This movement of the second threaded block then moves the second V-shaped plate. At this point, the first and second V-shaped plates move in a convergent-converging trajectory, facilitating adjustment by the operator based on the length of the reinforcing bar. Subsequently, the operator operates the controller to drive the first electric telescopic rod, which in turn moves the sliding box downwards. The second V-shaped plate moves down and approaches the first V-shaped plate. At this time, the rubber pads on the inner sides of the first and second V-shaped plates are compressed and deformed. The operation of the second electric telescopic rod drives the semi-circular block to compress the center of the steel bar, thereby enabling rapid strain testing of the steel bars in the bridge structure. It can also meet the requirements for fixing steel bars of various lengths. Compared with the traditional method of manually bending steel bars, it can accurately fix the position of the steel bars, greatly improve the detection accuracy, and avoid data deviation caused by steel bar shaking or displacement. The mechanical pushing structure achieves uniform and stable force application, making the degree of bending of the steel bars consistent, enhancing the repeatability and reliability of the test results, providing a solid guarantee for accurately assessing the stress-strain performance of steel bars, while saving a lot of manpower.
[0016] 2. The operator inserts the insert plate into the groove on one side of the positioning plate. At this time, the operator rotates the two sets of threaded rods inside the threaded tube. The rotation of the threaded rods causes the push plate to slide inside the limit box. The movement of the push plate causes multiple sets of insert blocks to be inserted into the slots, thereby achieving the effect of quickly fixing the limit insert plate. This makes it easier for the operator to repair and replace the semicircular block, thus greatly improving the daily maintenance efficiency of the device and bringing convenience to the operator during use. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a top view of the overall structure of this utility model;
[0019] Figure 3 This is a partial structural cross-sectional view of the adjustment mechanism in this utility model;
[0020] Figure 4 This is a schematic diagram of the overall structure of the fixing component in this utility model;
[0021] Figure 5 This utility model Figure 4 Enlarged structural diagram of section A.
[0022] In the diagram: 1. Workbench; 101. Backplate; 102. Support leg; 2. Adjustment mechanism; 201. Sliding groove; 202. Support plate; 203. First threaded block; 204. First bidirectional screw; 205. First forward / reverse motor; 206. First V-shaped plate; 207. Sliding box; 208. Second bidirectional screw; 209. Second forward / reverse motor; 210. Second threaded block; 211. Second V-shaped plate; 212. 1. First electric telescopic rod; 213. Fixing plate; 214. Second electric telescopic rod; 215. Semicircular block; 216. Guide rod; 217. Stop block; 218. Limiting groove; 219. Limiting block; 3. Fixing assembly; 301. Positioning plate; 302. Insert plate; 303. Limiting box; 304. Threaded tube; 305. Threaded rod; 306. Push plate; 307. Inserting block; 308. Slot; 309. Rotating block. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Please see Figure 1-5 The present invention provides a technical solution: a bridge structure stress and strain monitoring device, including a workbench 1, a back plate 101 fixedly installed on one side of the top of the workbench 1, and support legs 102 symmetrically fixedly installed on the bottom of the back plate 101; an adjustment mechanism 2 is provided between the workbench 1 and the back plate 101, and a fixing component 3 is provided inside the adjustment mechanism 2.
[0025] The adjustment mechanism 2 includes a sliding groove 201 inside the workbench 1. Support plates 202 are symmetrically fixedly connected to the bottom of the workbench 1. First threaded blocks 203 are symmetrically slidably connected inside the sliding groove 201. A first bidirectional screw 204 is rotatably connected between the support plates 202. The first threaded blocks 203 are disposed outside the first bidirectional screw 204 and threadedly connected to it. A first forward / reverse motor 205 is fixedly connected to one end of the first bidirectional screw 204. A first V-shaped plate 206 is fixedly installed on the top of the first threaded block 203. A sliding box 207 is provided on one side of the front of the back plate 101. A second bidirectional screw 208 is rotatably connected inside the sliding box 207. A second forward / reverse motor 209 is fixedly installed at one end of the second bidirectional screw 208. Second threaded blocks 210 are symmetrically threaded to the outer ends of the two ends of the second bidirectional screw 208. A second V-shaped plate 211 is fixedly installed at the bottom of the back plate 101, and a first electric telescopic rod 212 is fixedly installed on the top inner side of the back plate 101. The output end of the first electric telescopic rod 212 is fixedly connected to the sliding box 207. A fixed plate 213 is fixedly connected to one side of the front of the workbench 1, and a second electric telescopic rod 214 is fixedly connected to one side of the fixed plate 213. A semi-circular block 215 is provided at the output end of the second electric telescopic rod 214. This enables rapid strain testing of the steel bars in the bridge structure and can meet the effect of fixing steel bars of various lengths. Compared with the traditional method of manually bending steel bars, it can accurately fix the position of the steel bars, greatly improve the detection accuracy, and avoid data deviation caused by steel bar shaking or displacement. The mechanical push structure achieves uniform and stable force application, making the degree of bending of the steel bars consistent, enhancing the repeatability and reliability of the test results, providing a solid guarantee for accurately evaluating the stress and strain performance of steel bars, while saving a lot of manpower.
[0026] A guide rod 216 is symmetrically fixedly connected to the top of the sliding box 207, and the top of the guide rod 216 passes through the back plate 101 and is slidably connected to the back plate 101. A stop block 217 is fixedly connected to the top of the guide rod 216. The guide rod 216 moves as the sliding box 207 moves up and down. The guide rod 216 guides the sliding box 207 and provides stability when the sliding box 207 moves. The stop block 217 limits the guide rod 216 to prevent it from slipping. A limit groove 218 is symmetrically opened on the top of the workbench 1, and a limit block 219 is symmetrically fixedly connected to both sides of the positioning plate 301. The bottom of the limit block 219 is set inside the limit groove 218 and is slidably connected to the limit groove 218. The slidable connection between the limit block 219 and the limit groove 218 makes the semicircular block 215 move more stably, thereby further improving the accuracy of rebar detection.
[0027] The fixing component 3 includes a positioning plate 301 fixedly installed on one side of the semicircular block 215, and an insert plate 302 fixedly connected to the output end of the second electric telescopic rod 214. The insert plate 302 is inserted into the positioning plate 301. A limit box 303 is symmetrically fixedly connected to one side of the positioning plate 301. A threaded tube 304 is fixedly connected inside the limit box 303. A threaded rod 305 is threadedly connected inside the threaded tube 304. A push plate 306 is rotatably connected to one end of the threaded rod 305. The side of the push plate 306 away from the threaded rod 305 is... The insert 307 is welded on, and slots 308 are symmetrically opened on both sides of the insert plate 302. The insert 307 is inserted into the slot 308. The end of the threaded rod 305 away from the limit box 303 is fixedly connected to the rotating block 309, which can achieve the effect of quickly fixing the limit insert plate 302. This makes it easier for the staff to repair and replace the semicircular block 215, thereby greatly improving the daily maintenance efficiency of the device and bringing convenience to the staff when using it. The design of the rotating block 309 makes it easier for the staff to operate the threaded rod 305.
[0028] Working principle: Before using this bridge structure stress-strain monitoring device, it is necessary to check the overall condition of the device to ensure it can function normally. Figure 1 - Figure 5As shown, the worker first cleans the surface of the reinforcing bar, then uses glue and gauze to fix the strain gauge to the center area of the reinforcing bar, and connects the data cable to the SG04 testing equipment. The worker then places both ends of the reinforcing bar inside the two sets of first V-shaped plates 206. The worker operates the controller to drive the first forward / reverse motor 205 and the second forward / reverse motor 209. The operation of the first forward / reverse motor 205 drives the rotation of the first bidirectional screw 204, which in turn moves the two sets of first threaded blocks 203. The movement of the first threaded blocks 203 moves the first V-shaped plate 206, and the second forward / reverse motor 209 drives the rotation of the second bidirectional screw 208. The rotation of the second bidirectional screw 208 drives the movement of the second threaded block 210, which in turn drives the movement of the second V-shaped plate 211. At this time, the first V-shaped plate 206 and the second V-shaped plate 211 move in a convergent-unfolding trajectory, facilitating adjustment by the staff according to the length of the reinforcing bar. Subsequently, the staff operates the controller to drive the operation of the first electric telescopic rod 212. The operation of the first electric telescopic rod 212 drives the sliding box 207 to move downward. At this time, the second V-shaped plate 211 moves downward and approaches the first V-shaped plate 206. At this time, the rubber pads on the inner sides of the first V-shaped plate 206 and the second V-shaped plate 211 are compressed and deformed. Then, PW is sent to the second electric telescopic rod 214 through the PLC or microcontroller. The M control signal ensures simultaneous start and stop. A displacement sensor is installed on the second electric telescopic rod 214 to monitor the piston rod position in real time. A miniature force sensor is installed at the contact point between each semicircular block 215 and the rebar to monitor the compressive force in real time. A laser displacement sensor is installed at the bottom of the sliding box 207 to measure the bending deformation of the rebar non-contactly. The operation of the second electric telescopic rod 214 drives the semicircular blocks 215 to compress the center of the rebar, thereby enabling rapid strain detection of the rebar in the bridge structure and meeting the requirements for fixing rebars of various lengths. Compared with the traditional method of manually bending rebars, it can accurately fix the position of the rebar, greatly improve the detection accuracy, and avoid the problem of rebar shaking. Displacement can cause data deviation. Mechanically driven structures achieve uniform and stable force application, ensuring consistent bending of the reinforcing bars. This enhances the repeatability and reliability of test results, providing a solid guarantee for accurately assessing the stress-strain performance of reinforcing bars. It also saves a lot of manpower. The up-and-down movement of the sliding box 207 drives the movement of the guide rod 216. The guide rod 216 guides the sliding box 207, providing stability during its movement. The stop block 217 limits the guide rod 216 to prevent slippage. The sliding connection between the limiting block 219 and the limiting groove 218 makes the movement of the semicircular block 215 more stable, thereby further improving the accuracy of reinforcing bar testing.
[0029] The operator inserts the insert plate 302 into the groove on one side of the positioning plate 301. At this time, the operator rotates the two sets of threaded rods 305 inside the threaded tube 304. The rotation of the threaded rods 305 causes the push plate 306 to slide inside the limit box 303. The movement of the push plate 306 causes multiple sets of insert blocks 307 to be inserted into the slots 308, thereby achieving the effect of quickly fixing the limit insert plate 302. This makes it easier for the operator to repair and replace the semicircular block 215, thus greatly improving the daily maintenance efficiency of the device and bringing convenience to the operator during use. The design of the rotating block 309 makes it easier for the operator to operate the threaded rods 305.
[0030] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A bridge structure stress and strain monitoring device, comprising a workbench (1), wherein a back plate (101) is fixedly installed on one side of the top of the workbench (1), and support legs (102) are symmetrically fixedly installed on the bottom of the back plate (101). characterized in that Also includes: An adjustment mechanism (2) is provided between the workbench (1) and the back plate (101), and a fixing component (3) is provided inside the adjustment mechanism (2); The adjustment mechanism (2) includes a sliding groove (201) inside the workbench (1), and support plates (202) are symmetrically fixedly connected to the bottom of the workbench (1). First threaded blocks (203) are symmetrically slidably connected inside the sliding groove (201). A first bidirectional screw (204) is rotatably connected between the support plates (202). The first threaded block (203) is located outside the first bidirectional screw (204) and threadedly connected to it. A first forward / reverse motor (205) is fixedly connected to one end of the first bidirectional screw (204). A first V-shaped plate (206) is fixedly installed on the top of (203), and a sliding box (207) is provided on one side of the front of the back plate (101). A second bidirectional screw (208) is rotatably connected inside the sliding box (207). A second forward and reverse motor (209) is fixedly installed at one end of the second bidirectional screw (208). A second threaded block (210) is symmetrically threaded at both ends of the second bidirectional screw (208). A second V-shaped plate (211) is fixedly installed at the bottom of the second threaded block (210). A first electric telescopic rod (212) is fixedly installed on the inner side of the top of the back plate (101).
2. The bridge structure stress and strain monitoring device according to claim 1, characterized in that: A fixing plate (213) is fixedly connected to one side of the front of the workbench (1), and a second electric telescopic rod (214) is fixedly connected to one side of the fixing plate (213), and a semi-circular block (215) is provided at the output end of the second electric telescopic rod (214).
3. The bridge structure stress and strain monitoring device according to claim 1, characterized in that: The top of the sliding box (207) is symmetrically fixedly connected with guide rods (216), and the top of the guide rods (216) passes through the back plate (101) and is slidably connected to the back plate (101). The top of the guide rods (216) is fixedly connected with a stop block (217).
4. The bridge structure stress and strain monitoring device according to claim 1, characterized in that: The fixing component (3) includes a positioning plate (301) fixedly installed on one side of the semicircular block (215), and an insert plate (302) is fixedly connected to the output end of the second electric telescopic rod (214). The insert plate (302) is inserted into the positioning plate (301). A limit box (303) is symmetrically fixedly connected to one side of the positioning plate (301). A threaded tube (304) is fixedly connected inside the limit box (303). A threaded rod (305) is threadedly connected inside the threaded tube (304). A push plate (306) is rotatably connected to one end of the threaded rod (305). Insert blocks (307) are welded to the side of the push plate (306) away from the threaded rod (305). Slots (308) are symmetrically opened on both sides of the insert plate (302). Insert blocks (307) are inserted into the slots (308).
5. The bridge structure stress and strain monitoring device according to claim 1, characterized in that: The top of the workbench (1) is symmetrically provided with limiting grooves (218), and the two sides of the positioning plate (301) are symmetrically fixedly connected with limiting blocks (219). The bottom of the limiting block (219) is located inside the limiting groove (218) and is slidably connected to the limiting groove (218).
6. The bridge structure stress-strain monitoring device according to claim 4, characterized in that: A rotating block (309) is fixedly connected to the end of the threaded rod (305) away from the limiting box (303).
7. A bridge structure stress-strain monitoring device according to claim 1, characterized in that: The output end of the first electric telescopic rod (212) is fixedly connected to the sliding box (207).