CN220524881U - Bridge dynamic deflection measuring device - Google Patents
Bridge dynamic deflection measuring device Download PDFInfo
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- CN220524881U CN220524881U CN202321973301.3U CN202321973301U CN220524881U CN 220524881 U CN220524881 U CN 220524881U CN 202321973301 U CN202321973301 U CN 202321973301U CN 220524881 U CN220524881 U CN 220524881U
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 61
- 239000000725 suspension Substances 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims description 10
- 239000000523 sample Substances 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Bridges Or Land Bridges (AREA)
Abstract
The utility model relates to the technical field of bridge engineering measurement, in particular to a bridge dynamic deflection deformation measuring device. The measuring device comprises a suspension connecting component, a limiting component and a displacement measuring component; the suspension connecting component comprises a hanging hammer, and the top of the hanging hammer is connected with a hanging wire; the limiting component is used for limiting the movement of the lifting hammer in the horizontal direction; the displacement measurement assembly comprises a strain type displacement sensor and a support, wherein the support is used for fixing the strain type displacement sensor below the lifting hammer so that the strain type displacement sensor can be in contact with the bottom end of the lifting hammer. Compared with the prior art, the utility model transmits deflection through the suspension wire and the suspension hammer, and limits the suspension hammer through the limiting component so as to maintain the transverse stability of the suspension hammer, thereby effectively reducing deflection transmission errors. The measuring device has the advantages of simple structure, convenient operation, small measuring error and the like, and can provide basis for guaranteeing the normal service state of the bridge and making a daily maintenance work plan.
Description
Technical Field
The utility model relates to the technical field of bridge engineering measurement, in particular to a bridge dynamic flexural deformation measuring device.
Background
The bridge plays an important role in crossing special landforms such as mountains, hills, rivers, lakes and the like. For the existing plain traffic, the structural form of the ground bridge is widely applied in China in order not to influence the original traffic. The dynamic deflection is one of important parameters of the bridge, and is a measure of the capacity of the bridge to resist vertical bending deformation. Whether the bridge dynamic deflection deformation amount reasonably has an important influence on bridge vibration and deformation, bridge traffic and bridge maintenance workload. The accurate measurement of the dynamic deflection deformation of the bridge is an important means for judging the rationality of the bridge rigidity, developing normal maintenance and repair and ensuring the driving safety, and has very important practical significance.
Patent CN105928447a discloses a device for rapidly measuring bridge deflection, which has complex structure, difficult assembly and operation, and large error easily occurs when deflection is transmitted through a plurality of connecting rods.
Disclosure of Invention
The utility model provides a bridge dynamic deflection deformation measuring device which is used for solving the problem of large measuring error of the existing bridge deflection detecting device.
The utility model provides a bridge dynamic deflection deformation measuring device which comprises a suspension connecting assembly, a limiting assembly and a displacement measuring assembly, wherein the suspension connecting assembly is connected with the limiting assembly; the suspension connection assembly comprises a hanging hammer, and a hanging wire is connected to the top of the hanging hammer; the limiting component is used for limiting the movement of the lifting hammer in the horizontal direction; the displacement measurement assembly comprises a strain type displacement sensor and a support, wherein the support is used for fixing the strain type displacement sensor below the lifting hammer so that the strain type displacement sensor can be in contact with the bottom end of the lifting hammer.
In one embodiment, the limiting assembly comprises a bottom platform, wherein a support column is fixed to the top of the bottom platform, and a sleeve is fixed to the support column; the hanging hammer can be installed in the sleeve in an up-and-down sliding mode.
In one embodiment, the sleeve is provided with a vial thereon.
In one embodiment, the support comprises a support base and a support bar; the support rod is fixed at the top of the support base, the strain type displacement sensor is mounted on the support rod, and the strain type displacement sensor can move up and down along the support rod and is fixed at a position through a fastener.
In one embodiment, the strain-type displacement sensor comprises a strain gauge, a measuring probe, a measuring rod and a connecting block; the measuring probe is fixedly arranged on the strain gauge, and the strain gauge is fixedly connected with the measuring rod; the connecting block is provided with a first mounting hole and a second mounting hole which are perpendicular to each other, the measuring rod is inserted into the first mounting hole, and the second mounting hole is sleeved on the supporting rod and is fixed at a position through a fastener.
In one embodiment, the support has a magnet thereon, and the support is magnetically secured to the bottom platform by the magnet.
In one embodiment, the magnet is an electromagnet, and the support is further provided with a switch, and the switch is used for controlling on-off of current in the electromagnet.
In one embodiment, a hanging ring is fixedly connected to the center of the top of the hanging hammer, and the hanging wire is fixed on the hanging ring.
In one embodiment, the suspension wire is detachably mounted on the suspension ring through a buckle, the buckle comprises a U-shaped bolt, a nut and a gasket, and the gasket is mounted at two ends of the U-shaped bolt and is screwed and fixed through the nut.
In one embodiment, the strain displacement sensor is connected with a data acquisition and processing device, and the data acquisition and processing device is used for receiving an electric signal from the strain displacement sensor and displaying a deflection value corresponding to the electric signal.
Compared with the prior art, the utility model has the advantages that the deflection is transmitted through the lifting wire and the lifting hammer, the transmission structure is simple, the error is small, and the lifting hammer is limited through the limiting component so as to keep the transverse stability of the lifting hammer, thereby further effectively reducing the deflection transmission error caused by load factors such as wind and the like of the lifting rope and the lifting hammer. By providing the vials on the cylinder, the bottom platform is maintained level with reference to the vial adjustment stop assembly and the cylinder maintains vertical stability. The data acquisition and processing device is adopted to perform signal conversion processing and result display, and the reading is convenient and quick. The bridge dynamic deflection measuring device has the advantages of simple preparation, strong equipment replaceability, convenient operation, quick measurement, economy, convenience, accuracy and the like, and can provide basis for guaranteeing the normal service state of the bridge and making a daily maintenance work plan.
Drawings
The utility model will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.
FIG. 1 shows a schematic structural diagram of a bridge dynamic deflection measuring device of the present utility model;
FIG. 2 shows a schematic structural view of the spacing assembly of the present utility model;
FIG. 3 shows a schematic view of the construction of the suspension connection assembly of the present utility model;
fig. 4 shows a schematic structural view of the hammer of the present utility model;
FIG. 5 shows a schematic view of the construction of a suspension wire of the present utility model;
FIG. 6 shows a schematic structural view of the buckle of the present utility model;
FIG. 7 shows a schematic structural view of a displacement measurement assembly of the present utility model;
FIG. 8 shows a schematic structural view of the mount of the present utility model;
fig. 9 shows a schematic structural diagram of the strain-type displacement sensor of the present utility model.
Reference numerals:
1. a limit component; 11. a bottom platform; 12. a support column; 13. a sleeve; 14. a vial; 2. a hanging hammer; 21. a hanging ring; 22. a hammer body; 3. a hanging wire; 4. a buckle; 41. a nut; 42. a gasket; 43. u-shaped bolts; 5. a support; 51. a support base; 52. a switch; 53. a support rod; 6. a strain-type displacement sensor; 61. a measurement probe; 62. a strain gage; 63. a measuring rod; 64. a connecting block; 7. a data line; 8. a computer; 9. and a data acquisition instrument.
Detailed Description
The utility model will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 9, the bridge dynamic deflection measuring device provided by the utility model mainly comprises a suspension connecting assembly, a limiting assembly 1 and a displacement measuring assembly. The suspension connection assembly comprises a hanging weight 2, a hanging wire 3 is connected to the top of the hanging weight 2, and the hanging weight 2 is hung below the bridge through the hanging wire 3; the limiting component 1 is used for limiting the movement of the lifting hammer 2 in the horizontal direction; when the bridge is subjected to flexural deformation, the lifting hammer 2 descends, and the strain type displacement sensor 6 is triggered to deform and output an electric signal. The displacement measuring assembly comprises a strain type displacement sensor 6 and a support 5, wherein the support 5 is used for fixing the strain type displacement sensor 6 below the lifting hammer 2 so that the strain type displacement sensor 6 is in contact with the bottom end of the lifting hammer 2.
As shown in fig. 3 to 6, the suspension connection assembly includes a hanging weight 2 and a hanging wire 3, and the hanging weight 2 is suspended at the bottom end of the bridge by the hanging wire 3. The center of the top of the hanging weight 2 is fixedly connected with a hanging ring 21 by welding or casting, and one end of a hanging wire 3 passes through the hanging ring 21 and is fixedly clamped by a buckle 4, so that the hanging wire 3 and the hanging weight 2 form stable connection; the other end of the suspension wire 3 is used for being fixed with a bridge. The buckle 4 comprises a U-shaped bolt 43, a nut 41 and a gasket 42, wherein two through holes through which two ends of the U-shaped bolt 43 can pass are formed in the gasket 42, two ends of the U-shaped bolt 43 are respectively inserted into the two through holes of the gasket 42, and then the nut 41 is screwed on two ends of the U-shaped bolt 43 for fixing. The hanging weight 2 is hung at the bottom end of the bridge through the hanging wire 3, and the hanging weight 2 pulls the hanging wire 3 under the action of gravity to enable the hanging wire to be in a vertical state. The suspension wire 3 is preferably a steel strand to ensure sufficient strength of the suspension wire 3.
The limiting assembly 1 comprises a bottom platform 11, wherein a plurality of support columns 12 are vertically fixed on the top of the bottom platform 11 in a welding mode and the like, as shown in fig. 2,4 support columns 12 are uniformly distributed on the bottom platform 11, and the 4 support columns 12 are vertical to the bottom platform 11; the sleeve 13 is vertically arranged, and the upper parts of the support columns 12 are fixed on the sleeve 13 by welding so as to support the sleeve 13. The shape of the sleeve 13 is matched with the shape of the hammer 2, for example, when the hammer 2 is designed into a cylinder, the internal cavity of the sleeve 13 is designed into a cylinder, and the diameter of the internal cavity is slightly larger than that of the hammer 2, so that the hammer 2 can be vertically arranged in the sleeve 13 and can vertically slide up and down along the sleeve 13, but the horizontal movement of the hammer 2 is limited by the sleeve 13, thereby ensuring the transverse stability of the hammer 2. In other embodiments, where the hammer 2 is designed as a right prism, the internal cavity of the sleeve 13 is designed as a corresponding right prism, and the internal cavity should be slightly larger in size than the hammer 2. The outer wall surface at the top of the sleeve 13 is provided with a level bubble 14, the level bubble 14 is radially arranged along the sleeve 13, and when the limiting assembly 1 is installed, the installation position of the bottom platform 11 can be adjusted by referring to the level bubble 14, so that the radial direction of the sleeve 13 is in a horizontal state, and the sleeve 13 is axially in a vertical state.
As shown in fig. 7 to 9, the displacement measurement assembly includes a strain type displacement sensor 6 and a mount 5. The support 5 comprises a support base 51 and a support rod 53, wherein the support rod 53 is vertically fixed on the top of the support base 51, and the support rod 53 can be made of a steel rod. The strain displacement sensor 6 comprises a measuring probe 61, a strain gauge 62, a measuring rod 63 and a connecting block 64; the measuring probe 61 is fixedly arranged on the strain gauge 62, and the strain gauge 62 is connected with the measuring rod 63; the connecting block 64 is provided with a first mounting hole and a second mounting hole which are mutually perpendicular, the measuring rod 63 is inserted into the first mounting hole, and the extending length of the measuring rod 63 can be adjusted by adjusting the insertion depth of the measuring rod 63 in the first mounting hole; the second mounting hole is sleeved on the supporting rod 53, the connecting block 64 can slide along the supporting rod 53, and the height of the strain displacement sensor 6 is adjusted by adjusting the height of the connecting block 64 on the supporting rod 53; the connection block 64 is further provided with a screw hole communicating with the second mounting hole, and the connection block 64 and the strain displacement sensor 6 are fixed to the support rod 53 by screwing a bolt or a screw into the screw hole, so that the height of the strain displacement sensor 6 is fixed.
The support base 51 is provided with a magnet, the bottom platform 11 can be made of steel plates, and the displacement measuring assembly can be fixed on the bottom platform 11 through the magnet on the support base 51 in a magnetic attraction mode. Preferably, the magnet mounted on the support base 51 is an electromagnet, the support base 51 is also provided with a switch 52, the on-off of current in the electromagnet can be controlled through the switch 52, and the electromagnet generates magnetic force when electrified, so that the displacement measuring assembly can be magnetically fixed on the bottom platform 11; when the power is off, the magnetic force disappears, and the displacement measurement assembly can be easily taken down from the bottom platform 11.
The strain type displacement sensor 6 is connected with a data acquisition and processing device, and the data acquisition and processing device is used for receiving and processing the electric signal from the strain type displacement sensor 6 and displaying a deflection value corresponding to the electric signal. The data acquisition and processing device comprises a data acquisition instrument 9 and a computer 8. As shown in fig. 7, the strain displacement sensor 6 is connected with a data acquisition instrument 9 through a data line 7, and the data acquisition instrument 9 receives an electric signal from the strain displacement sensor 6 and converts the electric signal into a displacement signal; the data acquisition instrument 9 is connected with the computer 8 through the data line 7, and the computer 8 receives the displacement signal from the data acquisition instrument 9 and displays a deflection value corresponding to the displacement signal. When the bridge bears load and dynamic deflection occurs, the magnitude of deflection can be directly read on the computer 8, and the reading is convenient and the accuracy is high.
Before measuring bridge dynamic deflection, calibrating the strain displacement sensor 6 by a mechanical feeler, inserting the mechanical feeler with fixed thickness between the bottom of the lifting hammer 2 and the measuring probe 61 of the strain displacement sensor 6, inserting the mechanical feeler with different thickness can make the strain displacement sensor 6 generate different electric signals, and the electric signals correspond to the corresponding feeler thickness, and the electric signal-displacement curve of the displacement sensor can be drawn by calibrating the feeler with various different thicknesses, so that the bridge deflection is measured.
When measuring bridge dynamic deflection, the lifting wire 3 passes through the lifting ring 21 at the top of the lifting hammer 2, the lifting wire 3 is locked by the buckle 4, the lifting hammer 2 is lifted, the lifting wire is arranged in the sleeve 13, the other end of the lifting wire 3 is fixed with the bridge, and the lifting wire is also locked by the buckle 4, so that the assembly of the suspension connection assembly is completed. The bottom of the support 5 is abutted against the top surface of the bottom platform 11, and the knob switch 52 is turned to activate the magnetism of the support 5, so that the support 5 is adsorbed on the bottom platform 11. The connecting block 64 of the strain displacement sensor 6 passes through the supporting rod 53 and the height of the strain displacement sensor 6 is adjusted, so that the measuring probe 61 of the strain displacement sensor 6 is arranged at the bottom of the lifting hammer 2 and locks the position of the connecting block 64 on the supporting rod 53, and the top of the probe is kept in contact with the bottom of the lifting hammer 2. The strain type displacement sensor 6, the computer 8 and the data acquisition instrument 9 are connected by the data wire 7, and the installation of the displacement measurement assembly is completed at the moment. When the bridge is subjected to deflection deformation, the lifting hammer 2 descends, the strain type displacement sensor 6 is triggered to output an electric signal, and the deflection value can be directly read out on the computer 8 through collection and conversion of the data acquisition instrument 9.
While the utility model has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. The bridge dynamic deflection deformation measuring device is characterized by comprising a suspension connecting assembly, a limiting assembly and a displacement measuring assembly; the suspension connection assembly comprises a hanging hammer, and a hanging wire is connected to the top of the hanging hammer; the limiting component is used for limiting the movement of the lifting hammer in the horizontal direction; the displacement measurement assembly comprises a strain type displacement sensor and a support, wherein the support is used for fixing the strain type displacement sensor below the lifting hammer so that the strain type displacement sensor can be in contact with the bottom end of the lifting hammer.
2. The bridge dynamic deflection measuring device of claim 1, wherein the limiting assembly comprises a bottom platform, a support column is fixed to the top of the bottom platform, and a sleeve is fixed to the support column; the hanging hammer can be installed in the sleeve in an up-and-down sliding mode.
3. The bridge dynamic deflection measuring device according to claim 2, wherein a level bubble is provided on the sleeve.
4. The bridge dynamic deflection measuring device of claim 1, wherein the support comprises a support base and a support bar; the support rod is fixed at the top of the support base, the strain type displacement sensor is mounted on the support rod, and the strain type displacement sensor can move up and down along the support rod and is fixed at a position through a fastener.
5. The bridge dynamic deflection measuring device according to claim 4, wherein the strain type displacement sensor comprises a strain gauge, a measuring probe, a measuring rod and a connecting block; the measuring probe is fixedly arranged on the strain gauge, and the strain gauge is fixedly connected with the measuring rod; the connecting block is provided with a first mounting hole and a second mounting hole which are perpendicular to each other, the measuring rod is inserted into the first mounting hole, and the second mounting hole is sleeved on the supporting rod and is fixed at a position through a fastener.
6. The bridge dynamic deflection measuring device according to claim 2, wherein the support is provided with a magnet, and the support is magnetically fixed on the bottom platform by the magnet.
7. The bridge dynamic deflection measuring device according to claim 6, wherein the magnet is an electromagnet, and the support is further provided with a switch for controlling on-off of current in the electromagnet.
8. The bridge dynamic deflection measuring device according to claim 1, wherein a hanging ring is fixedly connected to the center of the top of the hanging hammer, and the hanging wire is fixed on the hanging ring.
9. The bridge dynamic deflection measuring device according to claim 8, wherein the suspension wire is detachably mounted on the suspension ring through a buckle, the buckle comprises a U-shaped bolt, a nut and a gasket, and the gasket is mounted at two ends of the U-shaped bolt and is fastened and fixed through the nut.
10. The bridge dynamic deflection measuring device according to claim 1, wherein the strain type displacement sensor is connected with a data acquisition and processing device, and the data acquisition and processing device is used for receiving an electric signal from the strain type displacement sensor and displaying a deflection value corresponding to the electric signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321973301.3U CN220524881U (en) | 2023-07-25 | 2023-07-25 | Bridge dynamic deflection measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321973301.3U CN220524881U (en) | 2023-07-25 | 2023-07-25 | Bridge dynamic deflection measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220524881U true CN220524881U (en) | 2024-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321973301.3U Active CN220524881U (en) | 2023-07-25 | 2023-07-25 | Bridge dynamic deflection measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220524881U (en) |
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2023
- 2023-07-25 CN CN202321973301.3U patent/CN220524881U/en active Active
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