Bridge prestress detection device
By designing a bridge prestressing testing device, a clamping device and a power device are used to prevent the steel wire from falling off, thus solving the problem of steel wire falling off during the stretching process and improving testing efficiency and data accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CCCC SHEC DONGMENG ENG CO LTD
- Filing Date
- 2024-12-03
- Publication Date
- 2026-06-02
AI Technical Summary
Prestressed steel wires in bridges are prone to detachment during the stretching process, affecting testing efficiency and data accuracy.
A bridge prestress testing device was designed, including a workbench, a movable seat, a first transmission rod, and a clamping device. The clamping device clamps the steel wire, and the movable seat is driven by a power device to stretch the steel wire to prevent it from falling off.
This effectively prevents the steel wire from falling off during the stretching process, improving testing efficiency and data accuracy.
Smart Images
Figure CN224317416U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of bridge inspection technology, and in particular to a bridge prestressing inspection device. Background Technology
[0002] A bridge is generally a structure erected over rivers, lakes, and seas to allow vehicles and pedestrians to pass smoothly. To adapt to the modern, rapidly developing transportation industry, the term "bridge" has also been extended to refer to structures that cross mountains, dams, or other challenging geological conditions to facilitate passage. To improve the overall stability and load-bearing capacity of bridges, prestressed steel wires are used during bridge construction. Prestressing is a compressive stress applied to the structure during construction to improve its service performance. During the service life of the structure, the prestressed compressive stress can completely or partially offset the tensile stress caused by the load, preventing structural damage. Under normal use, prestressed steel wires do not develop cracks or crack relatively late.
[0003] Prestressed steel wires are used extensively in bridge construction. When purchasing steel wires for wholesale, it is necessary to conduct prestress testing. However, because the surface of the steel wire tends to be smooth, it is very easy for the steel wire to fall off during positioning and stretching, which affects the efficiency of steel wire testing, affects the test data of steel wire rope testing, and causes large errors. Utility Model Content
[0004] This application aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, embodiments of this application provide a bridge prestressing testing device that effectively prevents steel wires from detaching during the tensioning process.
[0005] A bridge prestress testing device, comprising:
[0006] A workbench, the top of which has a groove, a fixed seat is provided in the groove, and a sliding groove is provided on the fixed seat;
[0007] A movable seat, which is fitted in the slide groove and is capable of sliding in the slide groove;
[0008] The first transmission rod is disposed inside the slide groove and extends along the length of the slide groove. The first transmission rod is threadedly connected to the movable seat. One end of the first transmission rod extends out from the side of the worktable for connecting to the power device.
[0009] A clamping device, comprising at least two clamping devices, includes a cylindrical body and multiple clamping plates. The cylindrical bodies are horizontally arranged, with adjacent cylindrical bodies coaxially aligned. The cylindrical body of one clamping device is mounted on a fixed base, and the cylindrical body of the other clamping device is fixed on a movable base. The clamping plates are arranged circumferentially at intervals inside the cylindrical body. A telescopic mechanism and a second transmission rod are provided between the clamping plates and the cylindrical body. The second transmission rod is rotatably connected to the inner wall of the cylindrical body and is capable of rotating relative to the cylindrical body. One end of the second transmission rod extends from one end of the cylindrical body. One end of the telescopic mechanism is drively connected to the second transmission rod, and the other end of the telescopic mechanism is hinged to the clamping plates. The second transmission rod can drive the telescopic mechanism to extend and retract radially along the cylindrical body. A first transmission structure is installed at the end of the second transmission rod extending from the cylindrical body. A second transmission structure is provided on the cylindrical body, and the second transmission structure is capable of rotating relative to the cylindrical body. The second transmission structure is drively connected to each of the first transmission structures.
[0010] In an optional or preferred embodiment, the slide groove is provided with two guide rods, which are arranged parallel to the first transmission rod and located on both sides of the first transmission rod, and the movable seat is slidably engaged with the guide rods.
[0011] In an optional or preferred embodiment, the first transmission structure is a gear, and the second transmission includes a toothed ring. The toothed ring is connected to the cylinder through a rotating component, and the inner wall of the toothed ring is provided with inner ring teeth that cooperate with the first transmission structure.
[0012] In an optional or preferred embodiment, the second transmission structure further includes a rotating ring, and an annular boss is provided at the end of the cylinder, which surrounds the outer wall of the cylinder along the circumference of the cylinder. The rotating ring is connected to the outer wall of the toothed ring, and the rotating ring and the toothed ring are concentrically arranged. An annular groove is provided on the rotating ring, and the annular groove cooperates with the annular boss.
[0013] In an optional or preferred embodiment, the second transmission structure further includes an annular handle, which is concentrically arranged with the rotating ring, the diameter of the annular handle being larger than the diameter of the rotating ring, and the annular handle being connected to the rotating ring.
[0014] In an optional or preferred embodiment, the telescopic mechanism includes a first nut sleeve, a second nut sleeve, a first connecting rod, and a second connecting rod. The second transmission rod has a left-hand threaded section and a right-hand threaded section, which are distributed in half along the axial direction of the second transmission rod. The first nut sleeve engages with the left-hand threaded section on the second transmission rod, and the second nut sleeve engages with the right-hand threaded section on the second transmission rod. One end of the first connecting rod is hinged to the first nut sleeve, and the other end is hinged to the clamping plate. One end of the second connecting rod is hinged to the second nut sleeve, and the other end is hinged to the clamping plate.
[0015] In an optional or preferred embodiment, an opening groove is formed inside the cylinder, the opening groove extends along the axial direction of the cylinder, and the transmission rod is disposed in the opening groove.
[0016] In an optional or preferred embodiment, the clamping surface of the clamping plate has an arc-shaped structure.
[0017] In an optional or preferred embodiment, the clamping surface of the clamping plate is provided with an anti-slip structure.
[0018] In an optional or preferred embodiment, there is a gap between the outer side wall of the fixing seat and the inner side wall of the groove, and a protective cover is installed in the gap. The protective cover covers the outside of the slide and each of the clamping devices, and the protective cover has notches on both sides for passing through steel wires.
[0019] Based on the above technical solution, the embodiments of this application have at least the following beneficial effects: In use, the two ends of the steel wire are respectively threaded into two clamping devices. The second transmission structure is rotated, causing the second transmission structure to drive the first transmission structure, which in turn causes the second transmission structure to drive the telescopic mechanism to extend so that the clamping plate clamps the steel wire. Then, the power device is started, and the power device drives the first transmission rod, which drives the moving seat, causing the clamping device on the moving seat to move away from the clamping device on the fixed seat. At this time, the steel wire will be stretched. When the moving seat moves from one end of the slide to the other end, if the steel wire does not break, it means that the prestress of the steel wire meets the requirements; otherwise, it means that the steel wire does not meet the requirements. The clamping device of this device can clamp the steel wire, effectively preventing the steel wire from falling off during the stretching process. Attached Figure Description
[0020] The present application will be further described below with reference to the accompanying drawings and embodiments;
[0021] Figure 1 This is a schematic diagram of the bridge prestressing testing device provided in the embodiments of this application;
[0022] Figure 2 yes Figure 1The illustrated embodiment provides a structural diagram after the protective cover has been removed;
[0023] Figure 3 yes Figure 1 A cross-sectional view of the clamping device in the illustrated embodiment;
[0024] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;
[0025] Figure 5 yes Figure 1 The diagram shows the connection relationship between the telescopic mechanism, the second transmission rod, and the clamping plate in the embodiment shown. Detailed Implementation
[0026] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.
[0027] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.
[0028] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0029] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.
[0030] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0031] A bridge is generally a structure erected over rivers, lakes, and seas to allow vehicles and pedestrians to pass smoothly. To adapt to the modern, rapidly developing transportation industry, the term "bridge" has also been extended to refer to structures that cross mountains, dams, or other challenging geological conditions to facilitate passage. To improve the overall stability and load-bearing capacity of bridges, prestressed steel wires are used during bridge construction. Prestressing is a compressive stress applied to the structure during construction to improve its service performance. During the service life of the structure, the prestressed compressive stress can completely or partially offset the tensile stress caused by the load, preventing structural damage. Under normal use, prestressed steel wires do not develop cracks or crack relatively late.
[0032] Prestressed steel wires are used extensively in bridge construction. When purchasing steel wires for wholesale, it is necessary to conduct prestress testing. However, because the surface of the steel wire tends to be smooth, it is very easy for the steel wire to fall off during positioning and stretching, which affects the efficiency of steel wire testing, affects the test data of steel wire rope testing, and causes large errors.
[0033] Reference Figures 1 to 5 This application provides a bridge prestress testing device, including a workbench 100, a movable seat 200, a first transmission rod 300, and a clamping device 400.
[0034] A groove is formed on the top of the workbench 100, and a fixed seat 110 is set in the groove. A sliding groove 111 is formed on the fixed seat 110. A movable seat 200 is assembled in the sliding groove 111 and can slide in the sliding groove 111. A first transmission rod 300 is set inside the sliding groove 111 and extends along the length of the sliding groove 111. The first transmission rod 300 is threadedly connected to the movable seat 200. One end of the first transmission rod 300 extends out from the side of the workbench 100 to connect to the power device 500. At least two clamping devices 400 are provided. The clamping device 400 includes a cylinder 410 and multiple clamping plates 420. The cylinder 410 is set horizontally, and two adjacent cylinders 410 are set coaxially. The cylinder 410 of one clamping device 400 is mounted on the fixed seat 110, and the cylinder 410 of the other clamping device 400 is fixed on the movable seat 200. Each clamping plate 420... Inside the cylinder 410, a telescopic mechanism 430 and a second transmission rod 440 are arranged circumferentially at intervals. Between the clamping plate 420 and the cylinder 410, there is a telescopic mechanism 430 and a second transmission rod 440. The second transmission rod 440 is rotatably connected to the inner wall of the cylinder 410 and can rotate relative to the cylinder 410. One end of the second transmission rod 440 extends from one end of the cylinder 410. One end of the telescopic mechanism 430 is connected to the second transmission rod 440, and the other end of the telescopic mechanism 430 is hinged to the clamping plate 420. The second transmission rod 440 can drive the telescopic mechanism 430 to move radially and extend and retract along the cylinder 410. A first transmission structure 441 is installed at the end of the second transmission rod 440 that extends from the end of the cylinder 410. A second transmission structure 411 is provided on the cylinder 410 and can rotate relative to the cylinder 410. The second transmission structure 411 is connected to each of the first transmission structures 441.
[0035] The travel distance of the movable seat 200 in the slide groove 111 is the length that the steel wire can be stretched under minimum prestress.
[0036] In use, the two ends of the steel wire are respectively threaded into the two clamping devices 400. The second transmission structure 411 is rotated, causing the second transmission structure 411 to drive the first transmission structure 441, which in turn causes the second transmission structure 411 to drive the telescopic mechanism 430 to extend, so that the clamping plate 420 clamps the steel wire. Then, by starting the power device 500, the power device 500 drives the first transmission rod 300, which in turn drives the moving seat 200, thereby moving the clamping device 400 on the moving seat 200 away from the clamping device 400 on the fixed seat 110. At this time, the steel wire will be stretched. When the moving seat 200 moves from one end of the slide groove 111 to the other end, if the steel wire does not break, it means that the prestress of the steel wire meets the requirements; otherwise, it means that the steel wire does not meet the requirements.
[0037] In some embodiments, the slide groove 111 is provided with two guide rods 310, which are arranged parallel to the first transmission rod 300 and located on both sides of the first transmission rod 300. The movable seat 200 is slidably engaged with the guide rods 310. By providing the guide rods 310, the movable seat 200 can be guided and limited, so that the movable seat 200 will not rotate when moving.
[0038] In some embodiments, the first transmission structure 441 is a gear, and the second transmission structure 411 includes a toothed ring 4110. The toothed ring 4110 is connected to the cylinder 410 through a rotating component, and the inner wall of the toothed ring 4110 is provided with inner ring teeth that cooperate with the first transmission structure 441.
[0039] Specifically, the diameter of the rotating ring is larger than the diameter of the cylinder 410. The toothed ring 4110 is connected to one end of the cylinder 410 through a bearing. By rotating the second transmission structure 411, each of the first transmission structures 441 can be driven to rotate.
[0040] Of course, the first transmission structure 441 can also be configured as a pulley, and the second transmission structure 411 can be configured as a synchronous belt.
[0041] In some other embodiments, the second transmission structure 411 further includes a rotating ring 4111. An annular boss 120 is provided at the end of the cylinder 410, surrounding the outer wall of the cylinder 410 circumferentially. The rotating ring 4111 is connected to the outer wall of the toothed ring 4110, and the rotating ring 4111 and the toothed ring 4110 are concentrically arranged. An annular groove is provided on the rotating ring 4111, which engages with the annular boss 120. During rotation, by rotating the rotating ring 4111, the rotating ring 4111 drives the toothed ring 4110 to rotate along the annular boss 120.
[0042] In some embodiments, the second transmission structure 411 further includes a ring handle 4112, which is concentrically arranged with the rotating ring 4111. The diameter of the ring handle 4112 is larger than the diameter of the rotating ring 4111, and the ring handle 4112 is connected to the rotating ring 4111. The ring handle 4112 is convenient for workers to hold and rotate by hand.
[0043] In some embodiments, the telescopic mechanism 430 includes a first nut sleeve 431, a second nut sleeve 432, a first connecting rod 433, and a second connecting rod 434. The second transmission rod 440 is provided with a left-hand threaded section and a right-hand threaded section, which are distributed in half along the axial direction of the second transmission rod 440. The first nut sleeve 431 engages with the left-hand threaded section on the second transmission rod 440, and the second nut sleeve 432 engages with the right-hand threaded section on the second transmission rod 440. One end of the first connecting rod 433 is hinged to the first nut sleeve 431, and the other end is hinged to the clamping plate 420. One end of the second connecting rod 434 is hinged to the second nut sleeve 432, and the other end is hinged to the clamping plate 420. When the second transmission structure 411 drives the first transmission structure 441 to rotate, causing the second transmission rod 440 to rotate clockwise, the first nut sleeve 431 and the second nut sleeve 432 move closer to each other, thereby causing the first connecting rod 433 and the second connecting rod 434 to extend the clamping plate 420 to clamp the steel wire. When the second transmission structure 411 drives the first transmission structure 441 to rotate, causing the second transmission rod 440 to rotate counterclockwise, the first nut sleeve 431 and the second nut sleeve 432 move further apart, thereby causing the first connecting rod 433 and the second connecting rod 434 to retract the clamping plate 420 to prevent the steel wire from becoming loose.
[0044] Of course, the telescopic mechanism 430 can also be configured as a scissor mechanism. Two legs at one end of the scissor mechanism are hinged to the clamping plate 420. One of the two legs at the other end of the scissor mechanism is hinged to the inner wall of the cylinder 410, and a nut sleeve is provided on the other leg. The second transmission rod 440 is configured as a lead screw structure. The nut sleeve is fitted on the second transmission rod 440. The second transmission rod 440 drives the leg with the nut sleeve of the scissor to move horizontally to achieve the telescopic action.
[0045] In some embodiments, an opening groove 110 is formed inside the cylinder 410, extending axially along the cylinder 410, and a second transmission rod 440 is disposed in the opening groove 110. Specifically, one end of the second transmission rod 440 is rotatably connected to one end of the opening groove 110 via a bearing, and the other end of the second transmission rod 440 extends out from the end face of the cylinder 410 through the opening groove 110. This makes the overall structure more compact.
[0046] In some embodiments, the clamping surface of the clamping plate 420 has an arc-shaped structure to better adapt to the structural shape of the steel wire.
[0047] Furthermore, the clamping surface of the clamping plate 420 is equipped with an anti-slip structure. This makes it easier for the clamping plate 420 to clamp the steel wire. The specific anti-slip structure can be anti-slip textures or anti-slip studs on the clamping surface.
[0048] In some embodiments, a gap 140 is provided between the outer side wall of the fixing base 110 and the inner side wall of the groove, and a protective cover 600 is installed in the gap 140. The protective cover 600 covers the outside of the slide groove 111 and each clamping device 400, and notches 610 for passing steel wires are provided on both sides of the protective cover 600. The protective cover 600 provides protection for the device.
[0049] In some embodiments, handles 620 are provided on both sides of the protective cover 600 to facilitate the removal of the protective cover by workers.
[0050] In some embodiments, a viewing window 630 is provided on one side of the protective cover 600.
[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0052] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.
Claims
1. A bridge prestress testing device, characterized in that, include: A workbench, the top of which has a groove, a fixed seat is provided in the groove, and a sliding groove is provided on the fixed seat; A movable seat, which is fitted in the slide groove and is capable of sliding in the slide groove; The first transmission rod is disposed inside the slide groove and extends along the length of the slide groove. The first transmission rod is threadedly connected to the movable seat. One end of the first transmission rod extends out from the side of the worktable for connecting to the power device. A clamping device, comprising at least two clamping devices, includes a cylindrical body and multiple clamping plates. The cylindrical bodies are horizontally arranged, with adjacent cylindrical bodies coaxially aligned. The cylindrical body of one clamping device is mounted on a fixed base, and the cylindrical body of the other clamping device is fixed on a movable base. The clamping plates are arranged circumferentially at intervals inside the cylindrical body. A telescopic mechanism and a second transmission rod are provided between the clamping plates and the cylindrical body. The second transmission rod is rotatably connected to the inner wall of the cylindrical body and is capable of rotating relative to the cylindrical body. One end of the second transmission rod extends from one end of the cylindrical body. One end of the telescopic mechanism is drively connected to the second transmission rod, and the other end of the telescopic mechanism is hinged to the clamping plates. The second transmission rod can drive the telescopic mechanism to extend and retract radially along the cylindrical body. A first transmission structure is installed at the end of the second transmission rod extending from the cylindrical body. A second transmission structure is provided on the cylindrical body, and the second transmission structure is capable of rotating relative to the cylindrical body. The second transmission structure is drively connected to each of the first transmission structures.
2. The bridge prestressing testing device according to claim 1, characterized in that: The slide groove is provided with two guide rods, which are arranged parallel to the first transmission rod and located on both sides of the first transmission rod. The movable seat is slidably engaged with the guide rods.
3. The bridge prestressing testing device according to claim 1, characterized in that: The first transmission structure is a gear, and the second transmission includes a toothed ring. The toothed ring is connected to the cylinder through a rotating component, and the inner wall of the toothed ring is provided with inner ring teeth that cooperate with the first transmission structure.
4. The bridge prestressing testing device according to claim 3, characterized in that: The second transmission structure further includes a rotating ring. The end of the cylinder is provided with an annular boss that surrounds the outer wall of the cylinder along the circumference of the cylinder. The rotating ring is connected to the outer wall of the toothed ring. The rotating ring and the toothed ring are concentrically arranged. The rotating ring is provided with an annular groove, which cooperates with the annular boss.
5. The bridge prestressing testing device according to claim 4, characterized in that: The second transmission structure further includes a ring handle, which is concentrically arranged with the rotating ring. The diameter of the ring handle is larger than the diameter of the rotating ring, and the ring handle is connected to the rotating ring.
6. The bridge prestressing testing device according to claim 1, characterized in that: The telescopic mechanism includes a first nut sleeve, a second nut sleeve, a first connecting rod, and a second connecting rod. The second transmission rod has a left-hand threaded section and a right-hand threaded section, which are distributed in half along the axial direction of the second transmission rod. The first nut sleeve engages with the left-hand threaded section on the second transmission rod, and the second nut sleeve engages with the right-hand threaded section on the second transmission rod. One end of the first connecting rod is hinged to the first nut sleeve, and the other end is hinged to the clamping plate. One end of the second connecting rod is hinged to the second nut sleeve, and the other end is hinged to the clamping plate.
7. The bridge prestressing testing device according to claim 1, characterized in that: An opening groove is formed inside the cylinder, the opening groove extends along the axial direction of the cylinder, and the transmission rod is disposed in the opening groove.
8. The bridge prestressing testing device according to claim 1, characterized in that: The clamping surface of the clamping plate has an arc-shaped structure.
9. The bridge prestressing testing device according to claim 8, characterized in that: The clamping surface of the clamping plate is provided with an anti-slip structure.
10. The bridge prestressing testing device according to claim 1, characterized in that: There is a gap between the outer wall of the fixed seat and the inner wall of the groove. A protective cover is installed in the gap. The protective cover covers the outside of the slide and each of the clamping devices. The protective cover has notches on both sides for passing through steel wires.