High-strength steel wire tensioning and anchoring device used in cooperation with jack

Abstract

A high-strength steel wire tensioning and anchoring device used in cooperation with a jack relates to the technical field of bridge engineering tests, and adopts the specific scheme that two supporting columns are fixedly supported between a first cross beam and a second cross beam to keep the two cross beams parallel, a circular-truncated-cone-shaped through hole I is formed in the center of the first cross beam, and a through hole II is formed in the center of the second cross beam; the anchor cup penetrates through the through hole II, a circular-truncated-cone-shaped through hole III is formed in the anchor cup, and the two pairs of clamping pieces are arranged in the two circular-truncated-cone-shaped through holes respectively; the counter-force frame is of a U-shaped structure, a through hole IV is formed in the center of the bottom of the counter-force frame of the U-shaped structure, the force transmission screw penetrates through the through hole IV and is in threaded connection with one end of a hollow inner threaded pipe located in the counter-force frame, threads are arranged on the outer surface of the anchor cup, and the other end of the hollow inner threaded pipe is in threaded connection with the anchor cup. And the nut is positioned between the second cross beam and the hollow threaded pipe and is screwed on the anchor cup.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering tests, and in particular to a high-strength steel wire tensioning and anchoring device used in conjunction with a jack. Background Art

[0002] The cable system is the most critical and vulnerable component of a cable-supported bridge. During long-term service, due to the coupling of the corrosive environment and load, high-strength steel wires are commonly subject to corrosion fatigue and fracture, which leads to degradation of the mechanical properties of the cable system and seriously threatens the service safety of cable-supported bridges. In recent years, there have been many incidents of bridge collapses caused by premature cable replacement or even fracture due to corrosion of the cable wires, resulting in serious safety accidents and huge economic losses. Therefore, it is urgent to study the corrosion mechanism and corrosion protection technology of high-strength steel wires in cable systems.

[0003] Accelerated corrosion tests and cathodic protection tests are important ways to study the corrosion mechanism and corrosion protection technology of high-strength steel wire. In order to further simulate the high stress state of cable steel wire during service, it is necessary to design a steel wire tensioning and anchoring device so that the high-strength steel wire always maintains a certain stress level during the test. However, on the one hand, the existing high-strength steel wire holding device needs to be used in conjunction with a tensile testing machine, and it is necessary to adjust the length of the clamp support column on the testing machine before anchoring, which is cumbersome and inconvenient to operate; on the other hand, since most methods thread the end of the steel wire, it is easy to cause stress concentration in the steel wire during clamping, making the steel wire easy to break near the clamping area, affecting the holding effect, and it is dangerous. Therefore, it is necessary to design a high-strength steel wire tensioning and anchoring device that is easy to operate, safe and reliable to provide guarantee for the test effect. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a high-strength steel wire tensioning anchoring device used in conjunction with a through-type jack, which can achieve effective clamping of the steel wire under different stress levels, reduce damage to the steel wire during the clamping process, and reduce the risk of the steel wire breaking near the clamping area. The entire tensioning anchoring device is light and simple, easy to move, and the force transmission component that works with the jack is detachable, which greatly reduces the weight of the tensioning device and facilitates test operations.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-strength steel wire tensioning and anchoring device used in conjunction with a jack comprises two support columns, a first crossbeam, a second crossbeam, two pairs of clips, an anchor cup, a nut, a reaction frame, a hollow internally threaded tube and a force transmission screw, wherein the two support columns are fixedly supported between the first crossbeam and the second crossbeam so that the two crossbeams remain parallel, a truncated cone-shaped through hole I is provided at the center of the first crossbeam, a through hole II is provided at the center of the second crossbeam, the anchor cup passes through through hole II, a truncated cone-shaped through hole III is provided inside the anchor cup, and the two pairs of clips are respectively placed inside the truncated cone-shaped through hole I and the truncated cone-shaped through hole III; the reaction frame is a 'U'-shaped structure, a through hole IV is provided at the bottom center of the 'U'-shaped reaction frame, the force transmission screw passes through through hole IV and is threadedly connected to one end of the hollow internally threaded tube located inside the reaction frame, a thread is provided on the outer surface of the anchor cup, the other end of the hollow internally threaded tube is threadedly connected to the anchor cup, and the nut is located between the second crossbeam and the hollow threaded tube and is screwed onto the anchor cup.

[0007] Furthermore, the first crossbeam and the second crossbeam are both fish-belly beams that are wide in the middle and narrow at both ends, and the wide middle portion and the narrow portions at both ends are transitioned through inclined surfaces, and the upper and lower surfaces of the first crossbeam and the second crossbeam are both horizontal sections.

[0008] Furthermore, the ends of the two side arms of the reaction frame are provided with grooves in the same direction as the opening direction of the 'U'-shaped reaction frame, and the grooves are engaged with the two ends of the second crossbeam; the bottom of the 'U'-shaped reaction frame is a plane.

[0009] Furthermore, the threads machined on the outer surface of the anchor cup, the outer surface of the force transmission screw and the inner wall of the hollow internally threaded tube are all trapezoidal threads.

[0010] Furthermore, through hole II and through hole IV are both cylindrical through holes.

[0011] Furthermore, the aperture of the end of the truncated cone-shaped through hole I away from the second beam is larger than the aperture of the end close to the second beam; the aperture of the end of the truncated cone-shaped through hole III close to the first beam is smaller than the aperture of the end away from the first beam.

[0012] Furthermore, the clamp is in a truncated cone shape, adapted to the truncated cone through hole I and the truncated cone through hole III, and a through hole V is provided in the middle of the clamp for the steel wire to pass through.

[0013] Furthermore, a deep circular groove is provided on the end face of the clamp with a larger diameter, and the diameter of the deep circular groove is the same as the diameter of the wire pier head.

[0014] Furthermore, the clip is composed of two symmetrical fan-shaped structures.

[0015] The nut is a hexagonal nut.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention achieves the tensioning of high-strength steel wire by pulling the force transmission screw, and the anchor cup can move axially through the through hole II, and achieve the anchoring effect through the hexagonal nut limit, so that different levels of stress can be applied as needed. In this process, direct tensioning of the steel wire is avoided, and only the pier heads at both ends of the steel wire need to be operated, which is conducive to reducing the damage to the steel wire during the tensioning process and avoiding the breakage of the steel wire during the force holding process.

[0018] 2. The threads of all parts in the present invention adopt trapezoidal threads to reduce stress concentration and ensure the reliability of the connection of each component.

[0019] 3. The force transmission component in the present invention is a tool component in the tensioning process, and can be disassembled after the high-strength steel wire is anchored, which maximizes the portability of the steel wire force-bearing component and facilitates subsequent experimental operations.

[0020] 4. The interior of the force transmission component of the present invention is hollow, which is convenient for use with a through-type jack and leaves enough operating space for wire anchoring.

[0021] 5. The crossbeam of the force-bearing assembly in the present invention is a left-right symmetrical fish-belly beam structure, and the structure with narrow ends and wide middle ensures the strength of the crossbeam after the middle part is pierced; the wide middle part and the narrow ends are transitioned by an inclined plane, which reduces stress concentration; the upper surface and the lower surface of the wide part of the crossbeam are both horizontal planes, which ensures the stability of the entire force-bearing device when it is placed horizontally, so that the device does not shake when it is placed horizontally. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 is a cross-sectional view of the present invention;

[0024] Figure 3 It is a front view of the present invention;

[0025] Figure 4 is a side view of the present invention;

[0026] Figure 5 A top view of the present invention;

[0027] Figure 6 for Figure 1 Schematic diagram of the structure of the middle holding force component;

[0028] Figure 7 for Figure 1 Schematic diagram of the structure of the middle force transmission component;

[0029] In the figure, 1, support column, 2, first cross beam, 3, second cross beam, 4, clip, 5, anchor cup, 6, nut, 7, reaction frame, 8, hollow internal threaded tube, 9, force transmission screw, 21, truncated cone through hole I, 22, wide part, 23, narrow part, 24, inclined surface, 31, through hole II, 41, through hole V, 51, truncated cone through hole III, 71, through hole IV, 72, groove. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] A high-strength steel wire tensioning anchoring device used in conjunction with a jack comprises a high-strength steel wire force transmission component and a force holding component. Figure 1-7 As shown, the force-bearing component includes two support columns 1, a first crossbeam 2, a second crossbeam 3, two pairs of clips 4, an anchor cup 5 and a nut 6, and the force transmission component includes a reaction frame 7, a hollow internal threaded tube 8 and a force transmission screw 9. The two support columns 1 are both cylindrical, and the two ends of the support column 2 are respectively welded to the first crossbeam 2 and the second crossbeam 3, and the fixed support is between the first crossbeam 2 and the second crossbeam 3 so that the two crossbeams remain parallel. The center of the first crossbeam 2 is provided with a truncated cone-shaped through hole I21, and the center of the second crossbeam 3 is provided with a through hole II31. The anchor cup 5 passes through the through hole II31, and the interior of the anchor cup 5 is provided with a truncated cone-shaped through hole III51. The two pairs of clips 4 are divided into The reaction frame 7 is a 'U'-shaped structure, and a through hole IV71 is provided at the bottom center of the 'U'-shaped reaction frame 7. One end of the force transmission screw 9 is connected to the jack, and the other end passes through the through hole IV71 and is threadedly connected to one end of the hollow internal threaded tube 8 located inside the reaction frame 7. The outer surface of the anchor cup 5 is provided with threads, and the other end of the hollow internal threaded tube 8 is threadedly connected to the anchor cup 5. The hollow threaded tube 8 is used to connect the anchor cup 5 and the force transmission screw 9. The nut 6 is located between the second crossbeam 3 and the hollow threaded tube 8 and is screwed on the anchor cup 5. The nut 6 is used to cooperate with the anchor cup 5 for anchoring after loading. There is enough space inside the reaction frame 7 to facilitate the operation of the nut 6.

[0033] Furthermore, the first crossbeam 2 and the second crossbeam 3 are both fish-belly beams that are wide in the middle and narrow at both ends, which saves materials while meeting the strength requirements, and the middle wide portion 22 and the narrow portions 23 at both ends are transitioned by an inclined surface 24 to reduce stress concentration. The upper and lower surfaces of the first crossbeam 2 and the second crossbeam 3 are both horizontal sections, which facilitates horizontal placement.

[0034] Furthermore, the ends of the two side arms of the reaction frame 7 are provided with grooves 72 in the same direction as the opening direction of the 'U'-shaped reaction frame 7, and the grooves 72 are engaged with the two ends of the second beam 3 to prevent slippage during the loading process of the jack; the bottom of the 'U'-shaped reaction frame 7 is a plane for supporting the jack. That is, one end of the reaction frame 7 is supported on the second beam 3 of the force-holding assembly, and the other end is the supporting surface of the jack.

[0035] Furthermore, the threads formed on the outer surface of the anchor cup 5, the outer surface of the force transmission screw 9 and the inner wall of the hollow internally threaded tube 8 are all trapezoidal threads.

[0036] Furthermore, both through hole II31 and through hole IV71 are cylindrical through holes.

[0037] Furthermore, the aperture of the end of the truncated cone-shaped through hole I21 away from the second beam 3 is larger than the aperture of the end close to the second beam 3 ; the aperture of the end of the truncated cone-shaped through hole III51 close to the first beam 2 is smaller than the aperture of the end away from the first beam 2 .

[0038] Furthermore, the clip 4 is truncated cone-shaped, adapted to the truncated cone-shaped through hole I21 and the truncated cone-shaped through hole III51, and a through hole V41 is provided in the middle of the clip 4 for the steel wire to pass through. The clip 4 and the truncated cone-shaped through hole are used together as the fixed end of the steel wire.

[0039] Furthermore, a deep circular groove is provided on the end face of the clamping piece 4 with a larger diameter, and the diameter of the deep circular groove is the same as the diameter of the wire pier head.

[0040] Furthermore, the clip 4 is composed of two symmetrical fan-shaped structures.

[0041] Furthermore, the nut 6 is a hexagonal nut.

[0042] Reference Figures 1 to 6 As shown, the two ends of the second cross beam 3 are placed in the two grooves 72 on the support arm of the reaction frame 7, and the hollow internal threaded rod 8 connects the anchor cup 5 and the force transmission screw 9. The steel wire is pulled by applying force to the force transmission screw 9 through a jack. When the tension is reached to a specified stress level, the nut 6 is tightened to achieve anchoring.

[0043] The specific use process of the present invention is as follows:

[0044] (1) Place the anchor cup 5 into the through hole II 31 of the second crossbeam 3 and pre-tighten the nut 6;

[0045] (2) Pass the high-strength steel wires of the two end piers through the truncated cone through hole I21 of the first crossbeam 2 and the truncated cone through hole III51 inside the anchor cup 5, and insert the two clamps 4 into the truncated cone through hole I21 and the truncated cone through hole III51 to clamp the steel wires;

[0046] (3) Screw one end of the hollow internal threaded rod 8 onto the anchor cup 5, and screw the other end into the force transmission screw 9;

[0047] (4) Pass the force transmission screw 9 through the through hole IV 71 of the reaction frame 7, and insert the groove 72 on the support arm of the reaction frame 7 into the end of the second crossbeam 3;

[0048] (5) The sensor and the through-type jack are passed through the force transmission screw 9, one end of which is supported on the bottom surface of the U-shaped structure of the reaction frame 7, and the other end is anchored to the force transmission screw 9, and the force transmission screw 9 is pulled by the through-type jack;

[0049] (6) After the jack is loaded, tighten the nut 6, remove the hollow inner screw 8, remove the force transmission component, and take out the force holding component together with the steel wire to conduct experiments under different working conditions;

[0050] (7) After the test is completed, remove the force-holding assembly, remove the nut 6 with a wrench, and remove the high-strength steel wire.

[0051] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other forms of assembly without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-strength steel wire tensioning anchoring device used in conjunction with a jack, characterized in that: The invention comprises two support columns (1), a first crossbeam (2), a second crossbeam (3), two pairs of clips (4), an anchor cup (5), a nut (6), a reaction frame (7), a hollow internally threaded tube (8) and a force transmission screw (9), wherein the two support columns (1) are fixedly supported between the first crossbeam (2) and the second crossbeam (3) arranged in parallel, a truncated cone-shaped through hole I (21) is provided at the center of the first crossbeam (2), a through hole II (31) is provided at the center of the second crossbeam (3), the anchor cup (5) passes through the through hole II (31), a truncated cone-shaped through hole III (51) is provided inside the anchor cup (5), and the two pairs of clips (4) are fixedly supported between the first crossbeam (2) and the second crossbeam (3) arranged in parallel, the first crossbeam (2) is provided with a truncated cone-shaped through hole I (21), the second crossbeam (3) is provided with a through hole II (31), the anchor cup (5) passes through the through hole II (31), the interior of the anchor cup (5) is provided with a truncated cone-shaped through hole III (51), and the two pairs of clips (4) are fixedly supported between the first crossbeam (2) and the second crossbeam (3) arranged in parallel, The clips (4) are respectively placed inside the truncated cone-shaped through hole I (21) and the truncated cone-shaped through hole III (51); the reaction frame (7) is a U-shaped structure, and a through hole IV (71) is provided at the center of the bottom of the U-shaped reaction frame (7); the force transmission screw (9) passes through the through hole IV (71) and is threadedly connected to one end of a hollow internally threaded tube (8) located inside the reaction frame (7); the outer surface of the anchor cup (5) is provided with threads, and the other end of the hollow internally threaded tube (8) is threadedly connected to the anchor cup (5); the nut (6) is located between the second cross beam (3) and the hollow threaded tube (8) and is screwed onto the anchor cup (5).

2. The high-strength steel wire tensioning anchoring device according to claim 1, characterized in that: The first cross beam (2) and the second cross beam (3) are both fish-belly beams that are wide in the middle and narrow at both ends, and the wide middle portion (22) and the narrow portions (23) at both ends are transitioned through inclined surfaces (24), and the upper surfaces and lower surfaces of the first cross beam (2) and the second cross beam (3) are both horizontal sections.

3. The high-strength steel wire tensioning anchoring device according to claim 1 or 2, characterized in that: The ends of the two side arms of the reaction frame (7) are provided with grooves (72) with the same opening direction as the 'U'-shaped reaction frame (7), and the grooves (72) are engaged with the two ends of the second cross beam (3); the bottom of the 'U'-shaped reaction frame (7) is a plane.

4. The high-strength steel wire tensioning anchoring device according to claim 1, characterized in that: The threads machined on the outer surface of the anchor cup (5), the outer surface of the force transmission screw (9) and the inner wall of the hollow internally threaded tube (8) are all trapezoidal threads.

5. The high-strength steel wire tensioning anchoring device according to claim 1, characterized in that: Through hole II (31) and through hole IV (71) are both cylindrical through holes.

6. The high-strength steel wire tensioning anchoring device according to claim 1, characterized in that: The aperture of the end of the truncated cone-shaped through hole I (21) away from the second cross beam (3) is larger than the aperture of the end close to the second cross beam (3); the aperture of the end of the truncated cone-shaped through hole III (51) close to the first cross beam (2) is smaller than the aperture of the end away from the first cross beam (2).

7. The high-strength steel wire tensioning anchoring device according to claim 1, characterized in that: The clamping piece (4) is in a truncated cone shape and is adapted to the truncated cone through hole I (21) and the truncated cone through hole III (51). A through hole V (41) is provided in the middle of the clamping piece (4) for the steel wire to pass through.

8. The high-strength steel wire tensioning anchoring device according to claim 7, characterized in that: A deep circular groove is arranged on the end face with a larger diameter of the clamping piece (4), and the diameter of the deep circular groove is the same as the diameter of the steel wire pier head.

9. The high-strength steel wire tensioning anchoring device according to claim 1, characterized in that: The clip (4) consists of two symmetrical fan-shaped structures.

10. The high-strength steel wire tensioning anchoring device according to claim 1, characterized in that: The nut (6) is a hexagonal nut.

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