CN117147305A - Bridge cable steel wire corrosion fatigue test device - Google Patents
Bridge cable steel wire corrosion fatigue test device Download PDFInfo
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- CN117147305A CN117147305A CN202311114868.XA CN202311114868A CN117147305A CN 117147305 A CN117147305 A CN 117147305A CN 202311114868 A CN202311114868 A CN 202311114868A CN 117147305 A CN117147305 A CN 117147305A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 104
- 239000010959 steel Substances 0.000 title claims abstract description 104
- 230000007797 corrosion Effects 0.000 title claims abstract description 55
- 238000005260 corrosion Methods 0.000 title claims abstract description 55
- 238000009661 fatigue test Methods 0.000 title claims abstract description 31
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 14
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- 210000004907 gland Anatomy 0.000 claims description 7
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- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 4
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- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 238000005530 etching Methods 0.000 description 17
- 239000000243 solution Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
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Abstract
The bridge cable steel wire corrosion fatigue test device comprises two opposite clamp bodies, wherein each clamp body comprises a connecting body, a disassembly bolt is arranged at the center position of the opposite sides of the two clamp bodies on the connecting body, a connecting rod is arranged at the center position of the other side of the connecting body, a pre-pressing jack is arranged on the inner wall of one side of the connecting body corresponding to the connecting rod, an anchor cup is arranged on the inner wall of one side of the connecting body corresponding to the disassembly bolt, a clamping piece is arranged inside the anchor cup, a pier head force transmission assembly is arranged on the upper part of the clamping piece, the telescopic end of the pre-pressing jack is contacted with the upper part of the pier head force transmission assembly, a steel wire sequentially penetrates through the pier head force transmission assembly, the clamping piece and the disassembly bolt, and a corrosion device is arranged on the steel wire between the two clamp bodies; the invention is matched with a fatigue testing machine for use, and can effectively reduce the influence of the clamp on the steel wire and avoid the problem of broken wire at the clamping position, thereby ensuring the smooth performance of the fatigue test of the cable steel wire.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, in particular to the technical field of bridge engineering tests, and particularly relates to a device for testing corrosion fatigue of a steel wire of a bridge cable.
Background
In the design of large span bridges, cable load-bearing bridges are widely adopted with their great crossing capacity, good technical and economic indicators and aesthetic value. The core stress member of the large span cable load-bearing bridge is a cable, and part of the cable is composed of galvanized steel wires. Because the bridge bears the dynamic load such as running vehicles and wind load, the cable is under the action of the dynamic load with high and low tensile stress alternation. It is necessary to conduct a cable fatigue test study by means of a cause analysis of an actual cable breakage accident. To study the fatigue properties of the cables, it is necessary to study the fatigue properties of the steel wires in the cables. Therefore, it is important to develop the basic test research of the fatigue of the bridge cable steel wire.
The bridge cable steel wire corrosion fatigue test and the corrosion fatigue crack propagation test are developed, firstly, the steel wire needs to be clamped reasonably and scientifically, and the steel wire is prevented from being broken in a clamping area and a nearby area in the test, however, when the steel wire is clamped by the existing steel wire fatigue test clamp, the steel wire can be subjected to uneven stress, clamping damage, stress concentration, sliding wire and other phenomena, and the clamping effect of the clamp is affected. And simultaneously applying corrosion and fatigue to the steel wire so as to observe and analyze the damage condition of the steel wire under the coupling action of corrosion and fatigue. Therefore, it is necessary to provide a bridge cable steel wire corrosion fatigue test device and a novel steel wire fatigue test clamp, which simulate the corrosion and fatigue coupling environment suffered by the steel wire in service, reduce the influence of the clamp on the steel wire, avoid the steel wire from breaking at the clamping end and the nearby area, and further improve the test effectiveness.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects in the prior art, and provide the bridge cable steel wire corrosion fatigue test device which is matched with a fatigue test machine, can realize effective clamping of the steel wire, reduce the influence of a clamp on the steel wire, prevent the steel wire from breaking at the clamping end and the nearby area, synchronously apply corrosion to the steel wire, further ensure that the steel wire fatigue test is carried out smoothly, is convenient to detach and can observe the clamping condition of the steel wire.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a bridge cable wire corrosion fatigue test device, includes two relative anchor clamps bodies, the anchor clamps body include the connector, two anchor clamps opposite side central point put on the connector and be provided with the dismantlement bolt, another side central point put of connector is provided with the connective bar, be provided with the pre-compaction jack on the inner wall of one side that the connector corresponds with the connective bar, be provided with the anchor cup on the inner wall of one side that corresponds with the dismantlement bolt, the clamping piece sets up in the anchor cup inside, clamping piece upper portion is provided with pier nose force transmission subassembly, the flexible end of pre-compaction jack contacts with pier nose force transmission subassembly upper portion, the steel wire passes pier nose force transmission subassembly, the clamping piece in proper order, the dismantlement bolt, be provided with corrosion simulation device on the steel wire between two anchor clamps bodies.
The cross section of the connector is of a rectangular structure, a connecting hole is formed in the center of the upper surface of the connector, first threaded holes are formed in the two sides of the connecting hole in the upper surface of the connector, a third threaded hole is formed in the center of the lower surface of the connector, and second threaded holes are formed in the two sides of the third threaded hole in the lower surface of the connector.
Rectangular through holes are formed in the width direction of the connector.
The clamping piece is of an inverted circular truncated cone shape, a circular threading hole is formed in the center of the clamping piece, a 2mm deep circular groove is formed in the top of the clamping piece, the diameter of the circular groove is matched with the diameter of the pier head force transmission assembly, the cone angle is 8.5+/-1 degrees, three fan-shaped structures are formed by trisecting the clamping piece in 360 degrees, and the gap between the adjacent fan-shaped structures is 1mm.
The inner surface of the clamping piece is toothless, the roughness of the clamping piece is the same as that of the steel wire, and copper plating treatment is carried out within the range of 20mm upwards at the bottom of the clamping piece.
The pier head force transmission assembly of the invention is as follows: the gasket is arranged in the gasket sleeve ring, the gasket sleeve ring and the gasket are correspondingly provided with unthreaded holes in the radial direction, and the clamping pins are arranged in the unthreaded holes; the gasket is composed of two symmetrical semicircular structures, a wire penetrating hole is formed in the center of the gasket, and the contact part of the wire penetrating hole and the steel wire pier head is processed into a sphere.
The anchor cup is of a cylindrical structure with a conical hole machined in the center, the taper of the bottom end of the conical hole is 8 degrees in the range of 15mm, the taper of the rest part is 8.5 degrees plus or minus 1 degrees, the taper is consistent with the taper angle of the clamping piece, and a fifth threaded hole is machined in the bottom of the anchor cup.
The base of the pre-pressing jack is provided with a sixth threaded hole, the telescopic end of the base is provided with a pre-pressing rod, and the lower part of the pre-pressing rod is provided with a rectangular groove.
The steel wire is a hot dip galvanized steel wire for bridge cables, and pier heads are processed at two ends of the steel wire.
The corrosion simulation device of the invention is as follows: the corrosion container is of a hollow cylindrical structure, both ends of the corrosion container are provided with pressing covers, the pressing covers tightly press the metal gasket and the sealing ring on the end part of the corrosion container to form a sealing structure, 2 groups of metal gaskets and the sealing ring are arranged at intervals, a through hole is processed in the middle of the metal gasket and the sealing ring to enable a steel wire to pass through, and the corrosion container is filled with a corrosion solution.
Compared with the prior device, the invention has the following advantages:
1. the pre-pressing device applies pre-pressing force to the clamping piece before the steel wire is stretched, so that the sliding of the steel wire in the clamp is effectively prevented.
2. The clamping pieces are in a tooth-free form, the surface roughness of the clamping pieces is consistent with that of the steel wires, when the steel wires are stretched, the steel wires and the clamping pieces have a relative movement trend, but the static friction force between the steel wires and the clamping pieces can prevent the steel wires and the clamping pieces from generating relative movement, the movement trend can increase the relative positive pressure between the clamping pieces and the contact surface of the anchor cup, so that the relative positive pressure between the clamping pieces and the steel wires is increased along with the increase, and finally the static friction force born by the steel wires is increased, and the effect is called the cone angle effect of the clamping pieces and the anchor cup. The cone angle effect can lead the static friction force born by the steel wire to be increased along with the increase of the tensile force, thereby ensuring that the steel wire is clamped firmly and the sliding wire can not occur. Besides, the inner surface of the clamping piece adopts a toothless structure, so that the surface damage of the clamping piece to the steel wire can be reduced. Therefore, the steel wire clamping device can not only realize effective clamping of the steel wire, but also reduce clamping damage, and can also avoid the occurrence of the condition of sliding the steel wire.
3. The taper of the clamping piece and the anchor cup is calculated by finite element analysis and calculation, and is reduced by 0.5 DEG within the range of 15mm at the lowest end, so that the clamping pressure is properly transited by the change of the taper, and the stress concentration phenomenon is reduced.
4. The invention makes the steel wire easy to detach, the corrosive solution is easy to replace, and the invention can conveniently and economically test a large number of parameters, and has wide application prospect.
5. The pier head measure for clamping the steel wire can be used as a safety reserve for sliding the steel wire, and the pier head force transmission assembly not only enables the pier head to bear part of the tensile force of the steel wire, but also facilitates the precompaction jack to transmit precompaction force to the clamping piece.
6. The hollowed-out part of the pre-pressing rod can not only ensure that the pre-pressing rod does not conflict with the space occupied by the pier head steel wire when in force transmission, but also can observe the condition of the pier head part in the test process.
7. The corrosion device has simple structure and light weight, the corrosion container can be made of transparent materials, and the condition of the corrosion fatigue coupling part of the steel wire in the test process can be visually observed.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a cross-sectional view of the clamp body of fig. 1.
Fig. 3 is a schematic three-dimensional structure and a sectional view of the connector 1 of fig. 1.
Fig. 4 is a schematic and sectional view of the three-dimensional structure of the clip 2 of fig. 1.
Fig. 5 is a schematic and sectional view of the three-dimensional structure of the anchor cup 9 of fig. 1.
Figure 6 is a schematic and cross-sectional view of the three-dimensional structure of the pier head force transfer assembly of figure 1.
Fig. 7 is a schematic view of the three-dimensional structure of the pre-compression jack 10 and the pre-compression rod 8 in fig. 1.
Fig. 8 is a three-dimensional schematic and cross-sectional view of the corrosion simulation apparatus 14 of fig. 1.
Fig. 9 is a three-dimensional schematic and cross-sectional view of the corrosion vessel 14-1 of fig. 8.
Fig. 10 is a schematic view and a plan view showing a three-dimensional structure of the metal gasket 14-2 in fig. 8.
Fig. 11 is a three-dimensional schematic and plan view of the seal ring 14-3 of fig. 8.
Fig. 12 is a schematic and sectional view of the three-dimensional structure of the gland 14-4 of fig. 8.
In the figure: 1. a connecting body; 2. a clamping piece; 3. a clamping needle; 4. a gasket collar; 5. a gasket; 6. a steel wire; 7. disassembling the bolts; 8. pre-pressing a rod; 9. an anchor cup; 10. prepressing the jack; 11. a connecting rod; 12. prepressing jack fixing bolts; 13. an anchor cup fixing bolt; 14. a corrosion simulation device; 1-1, connecting holes; 1-2, a second threaded hole; 1-3, a first threaded hole; 1-4, a third threaded hole; 2-1, a fan-shaped structure; 9-1, a fifth threaded hole; a sixth threaded hole 10-1;14-1, etching the container; 14-2, a metal gasket; 14-3, sealing ring; 14-4, capping; 14-5, etching solution.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, but the present invention is not limited to these examples.
Example 1
In fig. 1, 2 and 3, the bridge cable steel wire corrosion fatigue test device comprises two clamp bodies which are opposite up and down, wherein each clamp body comprises a connecting body 1, a dismounting bolt 7 is arranged at the center of the opposite sides of the two clamp bodies on the connecting body 1, and a connecting rod 11 is arranged at the center of the other side of the connecting body 1. Specifically, the cross-section shape of the connector 1 of this embodiment is rectangular structure, the center position of the upper surface of the connector 1 is processed with a connecting hole 1-1, a connecting rod 11 is arranged in the connecting hole 1-1, the free end of the connecting rod 11 is connected with a fatigue testing machine, the two sides of the connecting hole 1-1 on the upper surface of the connector 1 are processed with first threaded holes 1-3, the center position of the lower surface of the connector 1 is processed with third threaded holes 1-4, a disassembling bolt 7 is installed in the third threaded holes 1-4 and used for ejecting a clamping piece 2, and the two sides of the third threaded holes 1-4 on the lower surface of the connector 1 are processed with second threaded holes 1-2. For the convenience of observation, the connecting body 1 is provided with a rectangular through hole in the width direction, so that the whole device is visual and visible during installation, disassembly and operation. Further, the connector 1 is manufactured by machining 45 # steel (about 45 required by Rockwell hardness), the external outline dimension of the connector is 190mm long, 130mm wide and 300mm high, and the internal hollowed-out dimension is 130mm long, 130mm wide and 220mm high.
The pre-pressing jack 10 is installed on the inner wall of one side of the connecting body 1 corresponding to the connecting rod 11 through the pre-pressing jack fixing bolt 12 installed in the first threaded hole 1-3 and the sixth threaded hole 10-1, the anchor cup 9 is fixedly connected on the inner wall of one side of the connecting body 1 corresponding to the dismounting bolt 7 through the anchor cup fixing bolt 13 arranged in the second threaded hole 1-2 and the fifth threaded hole 9-1, and the clamping piece 2 is arranged in the middle of the anchor cup 9. The upper part of the clamping piece 2 is provided with a pier head force transmission assembly, the telescopic end of the pre-pressing jack 10 is contacted with the upper part of the pier head force transmission assembly, and the steel wire 6 sequentially penetrates through the pier head force transmission assembly, the clamping piece 2 and the dismounting bolt 7. The steel wire 6 is a hot dip galvanized steel wire for bridge cables, the diameter is 7mm, the strength is 1670MPa, 1770MPa, 1860MPa, 1960MPa, 2060MPa or 2160MPa, and pier heads are processed at the two ends.
In fig. 4, the clamping piece 2 of this embodiment is inverted round platform shape, and central point puts the processing and has circular wire hole, and circular wire hole diameter is 7mm, and the processing of top has 2mm dark circular slot, and circular slot diameter suits with pier nose power transmission subassembly diameter, and 2mm chamfer is opened to clamping piece 2 bottom, and the diameter is 47mm in this embodiment. Three fan-shaped structures 2-1 are trisected in 360 DEG phase, the gap between the adjacent fan-shaped structures 2-1 is 1mm, and the device is suitable for clamping the diameterSteel wires in the range. The clamping piece 2 is manufactured by machining 40 mm (about 45 required by Rockwell hardness), the height of the clamping piece 2 is 80mm, the cone angle is 8.5 degrees+/-1 degrees, the diameter of the bottom surface circle is 32mm, the diameter of the top surface circle can be calculated according to the cone angle and the height, the inner surface of the clamping piece 2 is tooth-free, and the roughness is the same as the surface roughness of the steel wire 6. And copper plating is performed at a height of 20mm above the bottom of the steel wire to reduce friction between the steel wire and the contact surface. The clamping piece 2 is positioned in the hollowed-out part of the anchor cup 9, and the outer side surface of the clamping piece is required to be smooth.
In fig. 5, the anchor cup 9 of the present embodiment is a cylindrical structure with a tapered hole formed in the center, and 2 fifth threaded holes 9-1 with a diameter of 10mm are formed in the bottom of the anchor cup 9 and correspond to two second threaded holes 1-2 with a diameter of 10mm formed in the lower portion of the connector 1, and anchor cup fixing bolts 13 are screwed into the threaded holes of the anchor cup 9 and the connector 1, so that the anchor cup 9 can be mounted on the connector 1 in a centered manner. The anchor cup 9 is manufactured by processing No. 45 steel (about 45 is required by Rockwell hardness), and has the height of 75mm and the diameter of 110mm; the taper angle of the inner hollowed-out part is 8 degrees within 15mm from the bottom, the taper angle of the rest part is 8.5 degrees plus or minus 1 degrees, the taper angle is consistent with the taper angle of the clamping piece 2, the diameter of the bottom of the hollowed-out part is 32mm, and the diameter of the top end is calculated according to the taper angle and the height.
In fig. 6, the pier head force transmission assembly of the embodiment is formed by connecting a clamping pin 3, a gasket collar 4 and a gasket 5, and is made of 45-gauge steel. The gasket 5 is installed in the gasket lantern ring 4, and gasket lantern ring 4 and gasket 5 radial corresponding processing have the unthreaded hole, and card needle 3 is installed in the unthreaded hole, and gasket 5 height 12mm, diameter 27mm, middle part processing have the diameter to be 7 mm's wire hole, wire hole top 2mm within range with 6 pier heads direct contact of steel wire and handle into the sphere that is close with the pier head appearance. The gasket 5 is composed of two symmetrical semicircular structures, and two round holes with the diameter of 2mm and the depth of 3mm are symmetrically dug in the middle of the side face along the direction perpendicular to the central axis. The gasket lantern ring 4 is cylindrical in appearance, 12mm in height and 47mm in diameter, a round hole with the diameter of 27mm is machined in the middle, and two round holes with the diameter of 2mm penetrating through the gasket lantern ring 4 are symmetrically dug in the middle of the side face, so that the clamp needle 3 can conveniently penetrate through. The clip 3 is of a cylindrical structure, the diameter is 2mm, and the length is 16mm. The gasket 5 is tightly sleeved by the gasket sleeve ring 4, and the gasket 5 and the gasket sleeve ring 4 are integrally connected by the clamping needle 3. The spacer 5 and spacer collar 4 in the pier head force transfer assembly are located in the hollowed out portion of the top of the clip 2.
In fig. 7, a sixth threaded hole 10-1 is machined in the base of the pre-pressing jack 10 of the embodiment, a pre-pressing rod 8 is mounted at the telescopic end, the pre-pressing jack 10 is a 10-ton small manual hydraulic jack, the pre-pressing rod 8 is of a cylindrical structure, a rectangular groove is machined in the lower portion of the pre-pressing rod 8, and the steel wire 6 pier head is located in the rectangular groove. The lowest end of the pre-pressing rod 8 is contacted with the pier head force transmission component.
In fig. 8-12, the etching apparatus of this example is composed of an etching container 14-1, a metal gasket 14-2, a seal ring 14-3, and a gland 14-4 connected together, the etching container 14-1 is of a hollow cylindrical structure, a smooth hollow cylinder can be made of a transparent material, an operator can observe the etching condition intuitively, the outer diameter is 45mm, the inner diameter is 35mm, the height is 50mm, external threads with a height of 10mm and a pitch of 1mm are formed on the outer portions of both ends of the etching container 14-1, the outer diameter of the external threads is 43mm, the inner diameter is 38mm, a step is formed at the position of 35mm with the inner diameter of the etching container 14-1, the step is used for placing the metal gasket 14-2 and the seal ring 14-3, and both ends of the etching container 14-1 are provided with the gland 14-4 through threaded connection fasteners.
The gland 14-4 is of a hollow cylindrical structure, the outer diameter is 50mm, the height is 15mm, the center of the top surface is hollowed out to form a cylinder with the diameter of 35mm and the height of 5mm, the center of the bottom is hollowed out to form a cylinder with the diameter of 45mm and the height of 10mm, and an internal thread with the height of 6mm and the screw pitch of 1mm is arranged so as to be in screw connection with the corrosion container 14-1.
The gland 14-4 compresses the metal gasket 14-2 and the sealing ring 14-3 on the end of the corrosion container 14-1 to form a sealing structure, through holes are processed in the middle of the metal gasket 14-2 and the sealing ring 14-3 to enable the steel wires 6 to pass through, 2 groups of the metal gasket 14-2 and the sealing ring 14-3 are arranged at intervals in the embodiment, wherein the metal gasket 14-2 consists of two semi-cylinders, the middle curves of the semi-cylinders are of an S-shaped structure, the diameter is 37mm, the thickness is 2mm, the diameter of the sealing ring 14-3 is 37mm, and the thickness is 3mm. The etching container 14-1 contains an etching solution 14-5. The concentration of the etching solution is changed by changing the NaCl content, and the pH value of the etching solution is adjusted by glacial acetic acid or sodium hydroxide solution.
The bridge cable steel wire corrosion fatigue test device has the following installation process:
firstly, placing a corrosion simulation device 14 in a steel wire corrosion fatigue coupling section through a steel wire 6, wherein the corrosion simulation device 14 is assembled from bottom to top, and after the assembly is completed, the contact part of the bottom of the corrosion simulation device 14 and the steel wire 6 is sealed by 704 silicon rubber; the connecting rod 11 and the dismounting bolt 7 are arranged on the connecting body 1, and the connecting rod 11 is clamped by the clamping head of the fatigue testing machine, so that the connection with the fatigue testing machine is completed. Secondly, the anchor cup 9 is fixed at the lowest part inside the connector 1 in a centering way through the anchor cup fixing bolts 13, the steel wire 6 penetrates through the anchor cup 9 from the lower through hole of the connector 1, then the clamping piece 2 is placed into the anchor cup 9, and the inner side surface of the clamping piece 2 clamps the steel wire 6, and the outer side surface is contacted with the anchor cup 9. Then the gasket 5 is placed at the lower part of the head end of the steel wire pier, the gasket collar 4 is sleeved outside, and the gasket 5 and the gasket collar 4 are connected together by the clamp needle 3. And then, fixing the pre-pressing jack 10 at the uppermost part inside the connecting body 1 through a pre-pressing jack fixing device 12, installing the pre-pressing rod 8 below the pre-pressing jack 10, applying pre-pressing force to the clamping piece 2 before the steel wire 6 is not stretched through the pre-pressing rod 8 to enable the device to clamp the steel wire 6, preventing slippage at a clamp when the steel wire 6 is stretched, arranging 2 clamp bodies at two ends of the steel wire 6 relatively, and after the connection of the clamp bodies and the steel wire sample is completed, filling an etching device 14 with an etching solution through an injection needle, and applying fatigue load to the fatigue machine to perform an etching fatigue test and an etching fatigue crack expansion test.
The dismounting process of the bridge cable steel wire corrosion fatigue test device is as follows:
the injection needle is used to remove the corrosive solution in the corrosion simulation device 14, the hydraulic device of the pre-compression jack 10 is adjusted to retract the pre-compression force, and the pre-compression rod 8 is removed. The disassembly bolt 7 is screwed upwards to eject the clamping piece 2, the clamping piece 2 is taken out of the connector 1, and the disassembly bolt 7 is screwed back to the original position. Firstly, taking out the clamping needle 3 on the gasket sleeve ring 4, then taking out the gasket 5 and the gasket sleeve ring 4, taking out the steel wire 6 and placing the steel wire, then taking out the sealing silicon rubber at the bottom of the corrosion simulation device 14, and finally removing the corrosion simulation device 14. The anchor cup 9 is removed after the anchor cup fixing bolts 13 are removed. The fatigue machine chuck is loosened, the connecting body 1 is firstly taken down, and then the connecting rod 11 is taken down. And (5) finishing the disassembly.
Claims (10)
1. The utility model provides a bridge cable steel wire corrosion fatigue test device which characterized in that: including two relative anchor clamps bodies, the anchor clamps body include connector (1), two anchor clamps opposite sides central point put on connector (1) and be provided with dismantlement bolt (7), connector (1) another side central point put and be provided with connecting rod (11), be provided with pre-compaction jack (10) on the inner wall of one side that connector (1) corresponds with connecting rod (11), be provided with anchor cup (9) on the inner wall of one side that corresponds with dismantlement bolt (7), clamping piece (2) set up in anchor cup (9) inside, clamping piece (2) upper portion is provided with pier nose and passes power subassembly, the flexible end of pre-compaction jack (10) contacts with pier nose power subassembly upper portion, steel wire (6) pass pier nose power subassembly, clamping piece (2), dismantlement bolt (7) in proper order, be provided with on steel wire (6) between two anchor clamps body and corrode simulator (14).
2. The bridge cable steel wire corrosion fatigue test device according to claim 1, wherein: the cross-section shape of connector (1) be rectangular structure, connector (1) upper surface central point puts and processes there is connecting hole (1-1), and connector (1) upper surface connecting hole (1-1) both sides processing have first screw hole (1-3), connector (1) lower surface central point put and process there is third screw hole (1-4), connector (1) lower surface third screw hole (1-4) both sides processing have second screw hole (1-2).
3. The bridge cable steel wire corrosion fatigue test device according to claim 2, wherein: rectangular through holes are formed in the width direction of the connector (1).
4. The bridge cable steel wire corrosion fatigue test device according to claim 1, wherein: the clamping piece (2) is of an inverted truncated cone shape, a round threading hole is machined in the center, a round groove with the depth of 2mm is machined in the top, the diameter of the round groove is matched with the diameter of the pier head force transmission assembly, the cone angle is 8.5+/-1 degrees, three fan-shaped structures (2-1) are trisected in 360 degrees of phase, and the gap between every two adjacent fan-shaped structures (2-1) is 1mm.
5. The bridge cable steel wire corrosion fatigue test device according to claim 4, wherein: the inner surface of the clamping piece (2) is toothless, the roughness is the same as that of the steel wire (6), and copper plating treatment is carried out within the range of 20mm upwards at the bottom of the clamping piece (2).
6. The bridge cable steel wire corrosion fatigue test device according to claim 1, wherein the pier head force transmission assembly is: the gasket (5) is arranged in the gasket lantern ring (4), the gasket lantern ring (4) and the gasket (5) are correspondingly provided with unthreaded holes in the radial direction, and the clamping needle (3) is arranged in the unthreaded holes; the gasket (5) is composed of two symmetrical semicircular structures, a wire penetrating hole is formed in the center of the gasket (5), and the contact part of the wire penetrating hole and the pier head of the steel wire (6) is processed into a sphere.
7. The bridge cable steel wire corrosion fatigue test device according to claim 1, wherein: the anchor cup (9) is of a cylindrical structure with a conical hole machined in the center, the taper of the bottom end of the conical hole is 8 degrees within 15mm, the taper of the rest part of the conical hole is 8.5 degrees+/-1 degrees, the conical angle of the anchor cup is consistent with that of the clamping piece (2), and a fifth threaded hole (9-1) is machined in the bottom of the anchor cup (9).
8. The bridge cable steel wire corrosion fatigue test device according to claim 1, wherein: the base of the pre-pressing jack (10) is provided with a sixth threaded hole (10-1), the telescopic end of the base is provided with a pre-pressing rod (8), and the lower part of the pre-pressing rod (8) is provided with a rectangular groove.
9. The bridge cable steel wire corrosion fatigue test device according to claim 1, wherein: the steel wire (6) is a hot dip galvanized steel wire for bridge cables, and pier heads are processed at two ends of the steel wire (6).
10. The bridge cable steel wire corrosion fatigue test device according to claim 1, wherein: the corrosion simulation device (14) is as follows: the corrosion container (14-1) is of a hollow cylindrical structure, the two ends of the corrosion container (14-1) are respectively provided with a gland cover (14-4), the metal gasket (14-2) and the sealing ring (14-3) are tightly pressed on the end part of the corrosion container (14-1) by the glands (14-4) to form a sealing structure, 2 groups of metal gaskets (14-2) and the sealing ring (14-3) are arranged at intervals, the middle parts of the metal gaskets are provided with through holes to enable the steel wires (6) to pass through, and the corrosion container (14-1) is filled with the corrosion solution (14-5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311114868.XA CN117147305A (en) | 2023-08-31 | 2023-08-31 | Bridge cable steel wire corrosion fatigue test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311114868.XA CN117147305A (en) | 2023-08-31 | 2023-08-31 | Bridge cable steel wire corrosion fatigue test device |
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| Publication Number | Publication Date |
|---|---|
| CN117147305A true CN117147305A (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311114868.XA Pending CN117147305A (en) | 2023-08-31 | 2023-08-31 | Bridge cable steel wire corrosion fatigue test device |
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| Country | Link |
|---|---|
| CN (1) | CN117147305A (en) |
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2023
- 2023-08-31 CN CN202311114868.XA patent/CN117147305A/en active Pending
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