CN218381370U - Cable force measuring device for inhaul cable with twisted structure - Google Patents
Cable force measuring device for inhaul cable with twisted structure Download PDFInfo
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- CN218381370U CN218381370U CN202222338428.XU CN202222338428U CN218381370U CN 218381370 U CN218381370 U CN 218381370U CN 202222338428 U CN202222338428 U CN 202222338428U CN 218381370 U CN218381370 U CN 218381370U
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Abstract
The utility model discloses a cable force measuring device for a guy cable with a hinge structure, which comprises a fixing mechanism and a vibrating wire strain gauge, wherein the fixing mechanism comprises a binding band, a locking piece and a sliding seat, the binding band is fixed at the preset position of the guy cable through the locking piece, and the sliding seat is arranged on the binding band in a mode of annular sliding around the guy cable; the fixing mechanisms at least comprise two groups which are respectively arranged on the inhaul cable along the axial direction, the vibrating wire strain gauge is arranged between the two groups of fixing mechanisms, and the two axial ends of the vibrating wire strain gauge are respectively fixed on the corresponding sliding seats in the two groups of fixing mechanisms; the vibration wire type strain gauge can be conveniently assembled and fixed, the stay cable can be prevented from being damaged, and accurate measurement of the cable force of the stay cable with the hinged structure is met.
Description
Technical Field
The utility model relates to a cable structure health monitoring field, concretely relates to be used for having cable force measuring device of hinge structure cable suitable for have hinge structure of twisting with fingers.
Background
The inhaul cable is one of common important component members of a building structure, and the monitoring and the definition of inhaul cable force values at different stress stages have great significance for guaranteeing the structural performance and the safety.
The common cable force monitoring methods comprise a pressure gauge method, a magnetic flux method, a vibration method, a clamp method and the like, wherein the pressure gauge method is not suitable for long-term cable force monitoring, the magnetic flux method and the vibration method are complex in operation and multiple in working procedures, the clamp method is simple in operation by measuring strain between cable sections of the cable and then calculating to obtain the cable force. The vibrating wire type strain measurement method is a structural strain measurement method based on the relation between the vibration frequency and the tension of the tension wire, has the advantages of simple structure, convenience in installation, strong anti-interference capability, small signal distortion and the like, and is suitable for long-term cable force detection. However, it can be seen from practical applications that the application of the vibrating wire strain gauge to the guy cable force measurement has some limitations.
Firstly, the traditional vibrating wire strain gauge consists of a vibrating wire strain gauge, an installation support and a signal transmission cable, is often limited by the shape of a tested structure in the follow-up aspect, and cannot be directly welded on a cable section in order to avoid damaging the mechanical property of a stay cable when the strain of the stay cable is measured; in addition, because the surface of the stay cable is smooth and mostly circular arc-shaped, the vibrating wire strain gauge cannot be fixed on the spiral steel cable section by adopting a glue joint method. If the mode that adopts anchor clamps is fixed, to the cable of different diameters, need to adopt different anchor clamps, the operation is comparatively inconvenient.
The second one is also the biggest limitation. Common inhaul cables can be divided into steel wire ropes, steel stranded wires, steel wire bundles, steel pull rods and the like. The vibrating wire strain gauge is applied to the measurement of the cable force of the guy cable with a simple structure, such as a parallel steel wire bundle and a steel pull rod, and the vibrating wire strain gauge is only required to be arranged on the guy cable through a fixing device. However, for the cable with a twisted structure composed of a plurality of steel wires, such as a steel strand and a semi-parallel steel wire bundle, if the vibrating wire strain gauge is directly fixed on the cable, since the cable is stressed and changed, relative rotation angles occur on different cross sections, and likewise, the two ends of the vibrating wire strain gauge are also twisted relatively, however, the vibrating wire strain gauge must be maintained on the same horizontal line during measurement, once relative rotation occurs, the measurement error is increased, and even the measurement fails.
Therefore, aiming at the technical problems, the cable force measuring device which is variable in diameter and capable of sliding in the circumferential direction and used for the stay cable with the twisted structure is provided, is applied to the field of cable force monitoring, and can meet the requirements of convenient assembly and fixation of the vibrating wire strain gauge and accurately obtain the actual strain value of the stay cable.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at overcoming the defect among the prior art, provide the cable force measuring device who is used for having hinge structure cable, can enough satisfy the convenient assembly of vibrating wire formula strainometer fixed, can overcome again because the big limitation of measuring error that the cable hinge structure produced, avoid under the destroyed prerequisite of cable, satisfy to having the accurate measurement of hinge structure cable force, the accurate actual cable force value that obtains the cable.
The utility model discloses a cable force measuring device for having cable of hinge twist structure, including fixed establishment and vibrating wire type strainometer, fixed establishment includes bandage, locking piece and slide, the bandage is fixed in the preset position of cable through the locking piece, the slide can set up in the bandage in the mode that can wind cable circumferential slip; the fixing mechanism at least comprises two groups which are respectively arranged on the inhaul cable along the axial direction, the vibration wire type strain gauge is arranged between the two groups of fixing mechanisms, and the two axial ends of the vibration wire type strain gauge are respectively fixed on the sliding seats which respectively correspond to the two groups of fixing mechanisms.
Furthermore, the binding belt is provided with fixed teeth, the fixing mechanism further comprises a driving fluted disc, driving teeth which are arranged along the radial direction of the driving fluted disc are arranged on the driving fluted disc, the driving teeth are in meshing transmission with the fixed teeth in a matched mode, and the locking piece is used for being matched with the fixed teeth to fix the binding belt at a preset position of the inhaul cable.
Further, the sliding seat is mounted on the binding band through a fixed seat, the fixed seat is fixed on the binding band, and the sliding seat is limited on the fixed seat; the sliding seat is arranged on the fixing seat in a sliding mode, and the fixing seat and the fixing teeth are located on the same side of the binding band.
Further, the slide passes through the ball and sets up in the fixing base, the fixing base has the spacing portion with the slide spacing.
Furthermore, the ball is two sets of at least, and two sets of balls correspond the setting respectively in the front side of slide and the rear side of slide along the cable axial.
Furthermore, a limiting support used for limiting and fixing one axial end of the vibrating wire type strain gauge is fixed on the sliding seat.
Furthermore, the fixing seat is provided with a functional hole, and the functional hole is formed along the binding direction of the binding band.
Further, a supporting baffle plate is fixed on the binding band, and the driving fluted disc is arranged on the supporting baffle plate in a manner of being driven to rotate; the supporting baffle is provided with a driving shaft which can be driven to rotate, the driving fluted disc is fixed on the driving shaft in a sleeved mode, and the axis of the driving fluted disc and the axis of the driving shaft are coaxially arranged.
Furthermore, the driving fluted disc is positioned at the top of the fixed teeth, the locking piece is hinged to the supporting baffle plate through a connecting pin shaft, and the central axis of the connecting pin shaft is parallel to the central axis of the driving shaft.
The utility model has the advantages that: the utility model discloses a cable force measuring device for having cable of hinge twist structure, including fixed establishment and vibrating wire type strainometer, the fixed establishment includes bandage, locking piece and slide, the bandage is fixed in the preset position of cable through the locking piece, the slide can be set up in the bandage in the mode of winding cable circumferential slip; the fixing mechanisms at least comprise two groups which are respectively arranged on the inhaul cable along the axial direction, the vibrating wire strain gauge is arranged between the two groups of fixing mechanisms, and the two axial ends of the vibrating wire strain gauge are respectively fixed on the corresponding sliding seats in the two groups of fixing mechanisms; overcome among the prior art to having the cable force measuring limitation of twisting with fingers structure cable, can enough satisfy the convenient assembly of vibrating wire formula strainometer fixed, can overcome again because the big limitation of measuring error that the cable twisted with fingers the structure and produce, avoid under the destroyed prerequisite of cable, satisfy the accurate measurement to having the cable force of twisting with fingers structure cable, the actual value of straining of cable is obtained to the accuracy, improve the sustainability that vibrating wire formula strainometer is measuring cable strain data's accuracy and reliability and fixing device used.
Drawings
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic side view of the present invention;
fig. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic structural view of the present invention applied to a cable;
FIG. 4 is a schematic view of a cross section structure of the utility model applied to a stay cable;
FIG. 5 is a schematic structural view of the connection between the slide base and the fixing base of the present invention;
FIG. 6 is a schematic view of an axial structure of the present invention applied to a cable; .
Detailed Description
Fig. 1 is a schematic structural diagram of the present invention, as shown in the figure, the annular direction is the axial direction around the cable 001, and is not described herein again, the cable force measuring device for a cable with a twisted structure in this embodiment includes a fixing mechanism and a vibrating wire strain gauge 01, the fixing mechanism includes a binding band 02, a locking member 03 and a sliding seat 04, the binding band 02 is fixed to a preset position of the cable 001 through the locking member 03, and the sliding seat 04 is disposed on the binding band 02 in a manner of being slidable circumferentially around the cable 001; the fixing mechanisms at least comprise two groups which are respectively arranged on the inhaul cable 001 along the axial direction, the vibrating wire type strainometer 01 is arranged between the two groups of fixing mechanisms, and the two axial ends of the vibrating wire type strainometer 01 are respectively fixed on the sliding seats 04 which respectively correspond to the two groups of fixing mechanisms. As shown in the figure, the axial fixation of the sliding seat 04 at the preset position of the cable 001 is realized by the cooperation of the binding band 02 and the locking piece 03 in the scheme, and the structural design of the binding band 02 can also be suitable for cables 001 with different diameters, so that the application range is wider, the positioning stability and effectiveness of the sliding seat 04 can be ensured, and the reliability of the sliding seat 04 in use is ensured; the use of two groups of fixing mechanisms enables the vibrating wire type strain gauge 01 to be more accurate in measurement, the two groups of fixing mechanisms are in two groups in the scheme, the two groups of fixing mechanisms can be actually fixed at two positions of the stay cable 001 in a deflectable mode, because different cross sections of the stay cable 001 with the twisted structure generate a relative rotation angle after being stressed, if two ends of the vibrating wire type strain gauge 01 are directly fixed on the two cross sections, the vibrating wire type strain gauge 01 is twisted after being stressed and cannot be measured, the use of two independent mechanisms enables the torsion force to be prevented from being twisted by the sliding seat 04 capable of annularly sliding around the stay cable 001 when the stay cable 001 deflects, the limitation that the measurement error generated by the twisted structure of the stay cable 001 is large can be overcome, the accurate measurement of the cable force of the stay cable 001 with the twisted structure is met on the premise that the cable 001 is damaged, the actual cable force value of the stay cable 001 is accurately obtained, namely the cable 02 and the locking piece 03 of each group of fixing mechanisms can be regarded as a whole with the preset positioning point corresponding to the vibrating wire type strain gauge 001, the two axial ends of the vibrating wire type strain gauge 01 are respectively fixed on the corresponding sliding seat 04 in the two groups of fixing mechanisms, and the vibrating wire type strain gauge 01 can be regarded as an accurate measurement; bandage 02 and locking piece 03's quick detach fast-assembling mode is applied to in the cable force monitoring field simultaneously, can also satisfy the convenient assembly of vibrating wire formula strainometer 01 fixed, and fixed stability obtains promoting, in the tensioning process of cable 001, cable 001 can produce the axial and be the strain of cable 001 length direction promptly, after the concrete numerical value that should meet an emergency of department is measured through vibrating wire formula strainometer 01, calculate through the material attribute of cable 001, can obtain the concrete cable force value of cable 001, vibrating wire formula strainometer 01 chooses for use any kind among the prior art to install on corresponding slide 04 can, no longer describe here.
In this embodiment, the strap 02 is provided with fixing teeth 05, the fixing teeth 05 are arranged in the extending direction of the strap 02, the fixing mechanism further comprises a driving fluted disc 06, the driving fluted disc 06 is provided with driving teeth 07 arranged along the radial direction of the driving fluted disc 06, the driving teeth 07 are in meshing transmission fit with the fixing teeth 05, and the locking piece 03 is used for being matched with the fixing teeth 05 to fix the strap 02 to a preset position of the cable 001. As shown in the figure, a supporting baffle 08 is fixed on the strap 02, and the driving fluted disc 06 is mounted on the supporting baffle 08 in a manner of being driven to rotate; the supporting baffle 08 is provided with a driving shaft 09 which can be driven to rotate, one axial end of the driving shaft 09 is connected with a driving handle 10, the driving shaft 09 is driven to rotate by the driving handle 10, the driving fluted disc 06 is fixed on the driving shaft 09 in a sleeved mode, the axis of the driving fluted disc 06 and the axis of the driving shaft 09 are coaxially arranged, the supporting baffle 08 is two blocks which are transversely arranged in an opposite mode, the stability of supporting the driving fluted disc 06 is improved, the supporting baffle 08 is arranged close to the head end of the extension direction of the strap 02, the fixed teeth 05 are arranged close to the tail end of the extension direction of the strap 02, the strap 02 bypasses a to-be-measured cable 001 in the circumferential direction and penetrates through the two supporting baffles 08 during use, the driving teeth 07 and the fixed teeth 05 are meshed, and the driving fluted disc 06 can be continuously rotated to lock the strap 02 at the preset position of the cable 001; the driving fluted disc 06 is positioned at the top of the fixed teeth 05, the locking piece 03 is hinged to the supporting baffle 08 through a connecting pin shaft, and the central axis of the connecting pin shaft is parallel to the central axis of the driving shaft 09; after fixed tooth 05 and drive tooth 07 meshing lock bandage 02 in the preset position of cable 001, stir locking piece 03 will with the cooperation of fixed tooth 05, force fixed tooth 05 and drive tooth 07 can not take place to reverse, can accomplish the continuation of bandage 02 in the preset position of cable 001 this moment and fix, as shown in the figure, in this scheme locking piece 03 uses during upwards stir make locking piece 03 do not hinder the meshing of fixed tooth 05 and drive tooth 07, need with when bandage 02 location stir locking piece 03 downwards promptly and make locking piece 03 and fixed tooth 05 cooperation locking, prevent that bandage 02 breaks away from cable 001, improve the fixed stability of bandage 02.
In this embodiment, the sliding seat 04 is mounted on the binding band 02 through the fixing seat 11, the fixing seat 11 is fixed on the binding band 02, the sliding seat 04 is limited on the fixing seat 11, the sliding seat 04 is located at the top of the fixing seat 11 in the height direction, the fixing seat 11 is provided with the function hole 12, the function hole 12 is formed in the binding direction of the binding band 02, the function hole 12 is located at the bottom of the sliding seat 04 in the height direction, the fixing seat 11 is arranged adjacent to the head end of the supporting baffle 08 in the extending direction of the binding band 02, and the supporting baffle 08 is closer to the head end of the extending direction of the binding band 02, so that the binding band 02 is further required to be inserted into the function hole 12 in the fixing seat 11 after being inserted into the supporting baffle 08, the limiting effect on the binding band 02 is improved, and the binding band 02 is further prevented from retracting; the sliding seat 04 is slidably disposed on the fixing seat 11, and the fixing seat 11 and the fixing teeth 05 are located on the same side of the binding band 02. As shown in the figure, the sliding seat 04 is disposed on the fixing seat 11 through a ball 13, and the fixing seat 11 has a limiting portion 14 for limiting the sliding seat 04, so that the sliding seat 04 does not fall out of the range limited by the fixing seat 11; at least two groups of balls 13 are arranged, and the two groups of balls 13 are respectively and correspondingly arranged on the front side of the sliding seat 04 and the rear side of the sliding seat 04 along the axial direction of the inhaul cable 001; the front and the back are the front and the back in the width direction of the binding band 02, which is not described herein again, further reduces friction, improves the sliding stability and the follow-up property of the sliding seat 04, and can timely release the displacement constraint of the vibrating string type strain gauge 01 in the annular direction when the stay cable 001 radially deflects, thereby improving the measurement accuracy of the vibrating string type strain gauge 01; a limiting support 15 for limiting and fixing one axial end of the vibrating wire strain gauge 01 is fixed on the sliding seat 04; as shown in the figure, spacing support 15 is fixed at the top of slide 04 in this scheme, and the both ends of vibrating wire type strainometer 01 correspond spacing support 15 who is fixed in two sets of fixed establishment respectively, accomplish the fixed mounting of whole device, vibrating wire type strainometer 01 is removable installation with spacing support 15's installation, the follow-up disassembly of being convenient for, and portable possesses repeatedly usable's characteristic.
The scheme also discloses a using method of the cable force measuring device for the cable with the hinged twisting structure, which comprises the following steps: the method comprises the following steps:
s1, mounting a vibrating wire strain gauge 01 on sliding seats 04 corresponding to two groups of fixing mechanisms respectively;
s2, fixing the corresponding binding bands 02 of the two groups of fixing mechanisms at preset positions of the inhaul cable 001;
s3, adjusting the horizontal angle of the vibrating wire strain gauge 01 to enable the two axial ends of the vibrating wire strain gauge 01 to be positioned on the same horizontal line and not to generate relative torsion;
s4, recording the reference frequency value f of the initial state of the vibrating wire strain gauge 01 before the inhaul cable 001 is stressed 0 Monitoring the cable force after the inhaul cable 001 is stressed;
s5, at a certain time i in the monitoring process, observing whether the two axial ends of the vibrating wire strain gauge 01 are still on the same horizontal line;
if yes, recording the frequency value f of the moment i i 、T i (ii) a If not, adjusting the sliding seat 04 to enable the two axial ends of the vibrating wire type strain gauge 01 to be in the same horizontal line, and recording the frequency value f of the moment i i 、T i ；
S6, data processing is carried out, the actual cable force F of the stay cable 001 can be obtained through substitution of the material attribute of the stay cable 001, and a specific calculation formula is as follows;
F＝εEA
in the formula: epsilon is the strain generated by the vibrating wire strain gauge 01 and has no unit;
k is the linear relation coefficient between the frequency value output by the vibrating wire strain gauge 01 and strain, also called the sensitivity coefficient of the vibrating wire strain gauge 01, and the unit is as follows: 1/Hz 2 ；
f i The frequency value of the vibrating wire strain gauge 01 at the moment i, hz;
f 0 the reference frequency value, hz, of the vibrating wire strain gauge 01 in the initial state;
K t the relation coefficient of the strain and the temperature of the vibrating wire type strain gauge 01 is calibrated when leaving a factory, and the unit is as follows: 1/° C;
T i temperature at detection, i.e. temperature at measurement, ° c;
t 0 temperature at calibration of the factory test, i.e. at measurement, C.
F is the actual cable force value of the inhaul cable 001, N;
e-modulus of elasticity, MPa, of the material of the inhaul cable 001;
a-area of section of cable 001 mm 2 ；
And S7, after the monitoring is finished, detaching the two groups of fixing mechanisms fixed on the inhaul cable 001.
The device is installed for measurement before the inhaul cable 001 is tensioned or stressed, and the whole device is installed on the inhaul cable 001 all the time in the monitoring process until the monitoring is finished; the stability and the data accuracy of the vibrating wire type strain gauge 01 in the long-term monitoring process can be ensured, and reliable data support and basis are provided for the structural health and safety; the utility model discloses a surface vibrating wire strain gauge 01 is introduced into the cable force measurement of a stay cable 001 with a twisted structure, and the cable force of the stay cable 001 can be continuously monitored for a long time; the operation is simple and convenient, the result is accurate, and the cost performance is high; reliable data support and basis are provided for the detection of the effective prestress of the prestressed cable 001 and the safety evaluation of the structure in the tensioning and using stages of the steel structure adopting the prestressed cable 001.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (9)
1. A cable force measuring device for a cable having an articulated configuration, characterized in that: the device comprises a fixing mechanism and a vibrating wire type strain gauge, wherein the fixing mechanism comprises a binding band, a locking piece and a sliding seat, the binding band is fixed at a preset position of a stay cable through the locking piece, and the sliding seat is arranged on the binding band in a mode of being capable of sliding annularly around the stay cable; the fixing mechanism at least comprises two groups which are respectively arranged on the inhaul cable along the axial direction, the vibrating wire strain gauge is arranged between the two groups of fixing mechanisms, and the two axial ends of the vibrating wire strain gauge are respectively fixed on the sliding seats which respectively correspond to the two groups of fixing mechanisms.
2. A cable force measuring device for a cable having an articulated configuration according to claim 1, characterized in that: the binding belt is provided with fixed teeth, the fixing mechanism further comprises a driving fluted disc, driving teeth which are arranged along the radial direction of the driving fluted disc are arranged on the driving fluted disc, the driving teeth and the fixed teeth are matched for meshing transmission, and the locking piece is used for being matched with the fixed teeth to fix the binding belt at a preset position of the inhaul cable.
3. The cable force measuring device for a cable having an articulated configuration according to claim 2, characterized in that: the sliding seat is arranged on the binding band through a fixed seat, the fixed seat is fixed on the binding band, and the sliding seat is limited on the fixed seat; the sliding seat is arranged on the fixing seat in a sliding mode, and the fixing seat and the fixing teeth are located on the same side of the binding band.
4. A cable force measuring device for a cable having an articulated construction according to claim 3, characterized in that: the slide passes through the ball and sets up in the fixing base, the fixing base has the spacing portion with the slide is spacing.
5. The cable force measuring device for a cable having an articulated configuration according to claim 4, characterized in that: the ball is two sets of at least, and two sets of balls correspond the setting respectively in the front side of slide and the rear side of slide along the cable axial.
6. A cable force measuring device for a cable having an articulated construction according to claim 3, characterized in that: and a limiting support used for limiting and fixing one axial end of the vibrating wire strain gauge is fixed on the sliding seat.
7. A cable force measuring device for a cable having an articulated construction according to claim 3, characterized in that: the fixing seat is provided with a functional hole, and the functional hole is formed along the binding direction of the binding band.
8. The cable force measuring device for a cable having an articulated construction according to claim 2, characterized in that: a supporting baffle is fixed on the binding belt, and the driving fluted disc is arranged on the supporting baffle in a manner of being driven to rotate; the supporting baffle is provided with a driving shaft which can be driven to rotate, the driving fluted disc is fixed on the driving shaft in a sleeved mode, and the axis of the driving fluted disc and the axis of the driving shaft are coaxially arranged.
9. The cable force measuring device for a cable having an articulated construction according to claim 8, characterized in that: the driving fluted disc is positioned at the top of the fixed teeth, the locking piece is hinged to the supporting baffle plate through a connecting pin shaft, and the central axis of the connecting pin shaft is parallel to the central axis of the driving shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222338428.XU CN218381370U (en) | 2022-09-02 | 2022-09-02 | Cable force measuring device for inhaul cable with twisted structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222338428.XU CN218381370U (en) | 2022-09-02 | 2022-09-02 | Cable force measuring device for inhaul cable with twisted structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218381370U true CN218381370U (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222338428.XU Active CN218381370U (en) | 2022-09-02 | 2022-09-02 | Cable force measuring device for inhaul cable with twisted structure |
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| CN (1) | CN218381370U (en) |
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- 2022-09-02 CN CN202222338428.XU patent/CN218381370U/en active Active
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