CN212621238U - Bridge inhaul cable force increment measuring device - Google Patents
Bridge inhaul cable force increment measuring device Download PDFInfo
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- CN212621238U CN212621238U CN202021525631.2U CN202021525631U CN212621238U CN 212621238 U CN212621238 U CN 212621238U CN 202021525631 U CN202021525631 U CN 202021525631U CN 212621238 U CN212621238 U CN 212621238U
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Abstract
The utility model provides a bridge inhaul cable force increment measuring device, which comprises a cable force tester, a transmission layer and a display layer; the cable force tester comprises an upper clamping ring, a lower clamping ring, four connecting rods and four strain gauges, wherein the upper clamping ring and the lower clamping ring are parallel and opposite, the middle parts of the upper clamping ring and the lower clamping ring are provided with clamping through holes for a cable to pass through, the aperture of each clamping through hole is slightly smaller than the diameter of the cable, the upper clamping ring and the lower clamping ring are connected through the four connecting rods, the four connecting rods are arranged at intervals and surround the periphery of the clamping through holes, and the middle part of each connecting rod is provided with one strain gauge; the transmission layer comprises an acquisition instrument, a 4G/5G signal transmitter and a cloud end, the acquisition instrument is connected with the four strain gauges, and the acquisition instrument is also connected with the cloud end through the 4G/5G signal transmitter; the display layer comprises terminal equipment, and the terminal equipment is connected with the cloud. The utility model discloses a measuring device can overcome the shortcoming that can't install the foil gage on the cable, and it is simple to have the principle, advantage that measuring accuracy is high.
Description
Technical Field
The utility model relates to a cable technical field, in particular to bridge inhaul cable power increment measuring device.
Background
The bridge cable generally comprises a suspender of an arch bridge, a tie bar, a stay cable of a cable-stayed bridge, a main cable of a suspension bridge and the suspender. The bridge is widely used due to the advantages of large spanning capacity, attractive appearance, definite structural stress, economy, practicability and the like. The bridge has the advantage that the cable force increment is a necessary test item no matter in the construction stage, the completion stage or the operation stage. At present, common cable force testing methods comprise a frequency method, a magnetic flux method and a pressure ring method, wherein the frequency method is a cable force measuring method which is widely applied, the cable force is indirectly obtained through the relation between the frequency and the cable force, although the method is simple and convenient to test, the error is large, and particularly under the condition that a cable is short, the error can cover the increment of the cable force. The magnetic flux method is still in the development stage at present, and the effect of the current application shows that the error is large, and the method cannot be used for testing the cable force increment of the bridge inhaul cable. The pressure ring method is high in testing precision and can meet the testing requirement of cable force increment, but the method needs to be provided with the pressure ring in advance when the stay cable is installed, the method cannot be used for the existing bridge, and the method is very expensive and cannot be popularized in a large scale. In view of the pain points in the industries, the bridge inhaul cable force increment measuring device which is simple and convenient to test and high in test precision is necessary and urgent.
SUMMERY OF THE UTILITY MODEL
In order to achieve the above purpose, the utility model adopts the technical proposal that:
a bridge inhaul cable force increment measuring device comprises a cable force tester, a transmission layer and a display layer; the cable force tester comprises an upper clamping ring, a lower clamping ring, four connecting rods and four strain gauges, wherein the upper clamping ring and the lower clamping ring are parallel and opposite, a clamping through hole for a cable to pass through is formed in the middle of the upper clamping ring and the lower clamping ring, the aperture of the clamping through hole is slightly smaller than the diameter of the cable, the upper clamping ring and the lower clamping ring are connected through the four connecting rods, the four connecting rods are arranged at intervals and surround the periphery of the clamping through hole, and the strain gauge is arranged in the middle of each connecting rod; the transmission layer comprises an acquisition instrument, a 4G/5G signal transmitter and a cloud end, the acquisition instrument is connected with the four strain gauges, and the acquisition instrument is also connected with the cloud end through the 4G/5G signal transmitter; the display layer comprises terminal equipment, and the terminal equipment is connected with a cloud.
Preferably, the structure of the upper clamping ring is the same as that of the lower clamping ring, the upper clamping ring is in a circular ring shape and is equally divided into two semicircular rings, lug plates are welded at two ends of each semicircular ring in the arc length direction, a bolt hole is formed in each lug plate, the two semicircular rings are connected into a circular ring in a mode that a bolt hole is inserted in each semicircular ring through high-strength bolt threads, and the inner ring of each circular ring is the clamping through hole.
Preferably, the hole wall of the clamping through hole is engraved with a thread structure.
Preferably, the connecting rod is made of metal or alloy, the cross section of the connecting rod in the vertical length direction is of a rectangular structure, and the size of the cross section is smaller than that of the inhaul cable.
Preferably, the terminal device is a computer, a mobile phone or a tablet.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model provides a bridge inhaul cable force increment measuring device, which has the characteristics of simple structure and definite deformation, can be conveniently installed on the existing inhaul cable, and can be repeatedly used;
(2) the utility model discloses a cable power tester warp and the unanimous relation of cable deformation through the connecting rod, warp through the direct test cable with traditional and turn into the test connecting rod and warp, has overcome the shortcoming that can't install the foil gage on the cable, and it is simple to have the principle, advantage that measuring accuracy is high.
Drawings
Fig. 1 is a schematic structural view of the cable force tester of the present invention.
Fig. 2 is a schematic diagram of the system structure of the measuring device of the present invention.
Description of the main elements
In the figure: the device comprises an upper clamping ring 1, a lower clamping ring 2, a connecting rod 3, a bolt 4, a strain gauge 5, a cable force tester 10, an acquisition instrument 20, a 4G/5G signal transmitter 30, a cloud end 40 and terminal equipment 50.
The following detailed description of the invention will be further described in conjunction with the above-identified drawings.
Detailed Description
Referring to fig. 1 to 2, in a preferred embodiment of the present invention, a bridge cable force increment measuring device includes a cable force tester 10, a transmission layer and a display layer.
The cable force tester 10 comprises an upper clamping ring 1, a lower clamping ring 2, four connecting rods 3 and four strain gauges 5, wherein the upper clamping ring 1 and the lower clamping ring 2 are parallel and opposite, a clamping through hole for a cable to pass through is formed in the middle of the upper clamping ring 1 and the lower clamping ring 2, the aperture of the clamping through hole is slightly smaller than the diameter of the cable, the upper clamping ring 1 and the lower clamping ring 2 are connected through the four connecting rods 3, the four connecting rods 3 are arranged at intervals and surround the periphery of the clamping through hole, and the strain gauge 5 is installed in the middle of each connecting rod 3. The utility model discloses a cable power tester 10 presss from both sides tight cable that awaits measuring through last clamp ring 1 and the centre gripping through-hole of clamp ring 2 down, make through connecting rod 3 clamp ring 1 and clamp ring 2 down and connect to last clamp ring 1 and clamp ring 2 take place to warp in step when shifting along with the cable atress produces down, should warp and can be detected by foil gage 5 on connecting rod 3, the deformation condition of cable can be known to the testing result through foil gage 5. In this embodiment, the structure of the upper clamping ring 1 is the same as that of the lower clamping ring 2, the upper clamping ring 1 is in a circular ring shape and is equally divided into two semicircular rings, lug plates are welded at two ends of each semicircular ring in the arc length direction, a bolt 4 hole is formed in each lug plate, the two semicircular rings are connected into a circular ring in a manner that a bolt 4 hole is inserted through a high-strength bolt 4 thread, and the inner ring of the circular ring is the clamping through hole. Preferably, the hole wall of the clamping through hole is engraved with a thread structure so as to increase the friction force of the upper clamping ring 1 and the lower clamping ring 2 for clamping the inhaul cable. Preferably, the connecting rod 3 is made of metal or alloy, specifically, the metal or alloy with light weight, moderate hardness and strong fatigue resistance is adopted, the cross section of the connecting rod in the vertical length direction is of a rectangular structure, the size of the cross section is smaller than that of the cross section of the inhaul cable, specifically, the size of the cross section of the connecting rod 3 is far smaller than that of the cross section of the inhaul cable, so that the deformation of the connecting rod 3 is synchronous with that of the inhaul cable, and the shared tension of the connecting rod 3 can be ignored.
The transmission layer includes collection appearance 20, 4G 5G signal transmitter 30 and high in the clouds 40, collection appearance 20 all is connected with four foil gages 5 for gather the strain signal that foil gage 5 detected, and convert the signal of telecommunication that foil gage 5 was gathered into digital signal, collection appearance 20 still connects high in the clouds 40 through 4G 5G signal transmitter 30, so as to transmit digital signal for high in the clouds 40 through 4G 5G signal transmitter 30. The display layer comprises a terminal device 50, the terminal device 50 is connected with the cloud end 40, specifically, the display layer is in a wireless connection mode, so that data of the cloud end 40 are received in real time through the Internet, relevant parameters of the stay cable to be tested are set on the terminal device 50, and the parameters are combined with the data transmitted by the cloud end 40, so that the cable force increment of the stay cable to be tested can be obtained; preferably, in this embodiment, the terminal device 50 is a computer, a mobile phone or a tablet.
The utility model discloses in, the measuring principle of the cable force increment of the stay rope that awaits measuring is as follows:
the upper clamping ring 1 and the lower clamping ring 2 of the cable force tester 10 are clamped with the cable force to be tested, and the cross section of the connecting rod 3 is far smaller than that of the inhaul cable, so that the deformation of the connecting rod 3 and the synchronous deformation of the inhaul cable can be realized, and the shared tension of the connecting rod 3 is ignored. Then, the cable force increment Δ F is as follows:
△F＝EAεa (1)
in the formula, EA is tensile rigidity of the stay, epsilonaTo average strain, it is obtained by the following formula:
in the formula, epsiloniThe strain value of the ith strain gage 5.
Based on the principle, after the cable force tester 10 clamps the cable, the strain value epsilon obtained by measuring through the strain gauge 5 is obtainediIntegrating the strain values epsilon measured by all the strain gauges 5iIn formula (2), the average strain value ε can be obtainedaUnder the condition that the tensile rigidity of the stay cable to be measured is known, the calculated average strain value epsilonaThe cable force increment Delta F of the inhaul cable can be obtained by substituting the formula (1). Therefore, the utility model provides a measuring device can be used to measure the cable force increment of bridge cable, and measures portably, convenient to use.
Claims (5)
1. The utility model provides a bridge cable power increment measuring device which characterized in that: comprises a cable force tester, a transmission layer and a display layer; the cable force tester comprises an upper clamping ring, a lower clamping ring, four connecting rods and four strain gauges, wherein the upper clamping ring and the lower clamping ring are parallel and opposite, the middle parts of the upper clamping ring and the lower clamping ring are provided with clamping through holes for a cable to pass through, the aperture of each clamping through hole is slightly smaller than the diameter of the cable, the upper clamping ring and the lower clamping ring are connected through the four connecting rods, the four connecting rods are arranged at intervals and surround the periphery of the clamping through holes, and the middle part of each connecting rod is provided with one strain gauge; the transmission layer comprises an acquisition instrument, a 4G/5G signal transmitter and a cloud end, the acquisition instrument is connected with the four strain gauges, and the acquisition instrument is also connected with the cloud end through the 4G/5G signal transmitter; the display layer comprises terminal equipment, and the terminal equipment is connected with a cloud.
2. The bridge inhaul cable force increment measuring device of claim 1, wherein: the structure of going up clamp ring and clamp ring down is the same, go up the clamp ring and be the ring form to equally divide into two semicircle rings, the both ends on each semicircle ring arc length direction all weld the otic placode, have seted up the bolt hole on each otic placode, two semicircle rings connect into a ring through the mode that high strength bolt screw thread inserted the bolt hole, the inner ring of ring does the centre gripping through-hole.
3. The bridge inhaul cable force increment measuring device of claim 1, wherein: and a thread structure is carved on the hole wall of the clamping through hole.
4. The bridge inhaul cable force increment measuring device of claim 1, wherein: the connecting rod is made of metal or alloy, the cross section of the connecting rod in the direction perpendicular to the length direction is of a rectangular structure, and the size of the cross section is smaller than that of the cross section of the inhaul cable.
5. The bridge inhaul cable force increment measuring device of claim 1, wherein: the terminal equipment is a computer, a mobile phone or a tablet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021525631.2U CN212621238U (en) | 2020-07-29 | 2020-07-29 | Bridge inhaul cable force increment measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021525631.2U CN212621238U (en) | 2020-07-29 | 2020-07-29 | Bridge inhaul cable force increment measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212621238U true CN212621238U (en) | 2021-02-26 |
Family
ID=74729170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021525631.2U Active CN212621238U (en) | 2020-07-29 | 2020-07-29 | Bridge inhaul cable force increment measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212621238U (en) |
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2020
- 2020-07-29 CN CN202021525631.2U patent/CN212621238U/en active Active
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