Anchoring device and stay anchoring device for a nelson system arch bridge

Abstract

The application relates to the technical field of anchoring devices, and discloses an anchoring device and a cable anchoring device for a Nielsen system arch bridge. The anchoring device comprises a mounting seat, a pipe body and a fixing seat. An inner thread is arranged on the inner wall of the pipe body. An outer thread that is matched with the inner thread of the inner wall of the pipe body is arranged on the mounting seat. A conical hole is arranged on the mounting seat and the fixing seat. The inner diameter of the conical hole of the mounting seat gradually increases in the direction away from the pipe body. The inner diameter of the conical hole of the fixing seat gradually decreases in the direction away from the pipe body. A second limiting clamp is arranged in the conical hole of the mounting seat. A first limiting clamp is arranged in the conical hole of the fixing seat. An elastic piece is arranged between the mounting seat and the first limiting clamp. The anchoring device is convenient and time-saving for the re-tensioning of a cable, has small space limitation, reduces the difficulty and complexity of cable tensioning, buffers the impact on the cable, and improves the reliability of the cable anchoring device for the Nielsen system arch bridge.

Description

Technical Field

[0001] This invention relates to the field of anchoring device technology, specifically to an anchoring device and a cable anchoring device for Nelson system arch bridges. Background Technology

[0002] Clip-type anchoring devices are widely used in highway bridges, railway bridges, water conservancy projects, mining and other fields. During the construction of the anchoring device, the cable passes through the conical hole of the anchor plate, and the wedge-shaped clip is placed into the conical hole of the anchor plate. The cable is tensioned by a jack until it reaches the set stress value. Then the jack is slowly released, and the clip clamps the cable to lock it.

[0003] Due to factors such as temperature changes and metal creep, the cable tension may be lost, requiring the use of jacks to re-tension the cable. This not only takes a long time to operate, but also requires the demolition of part of the building structure when the construction space is limited, thus increasing the difficulty and complexity of cable tensioning. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide an anchoring device and a cable anchoring device for Nelson system arch bridges. The present invention provides convenient and time-saving cable retensioning, is less restricted by space, reduces the difficulty and complexity of cable tensioning, and buffers the impact on the cable, thereby improving the reliability of the cable anchoring device for Nelson system arch bridges.

[0005] The technical solution adopted by this invention to solve its technical problem includes:

[0006] On one hand, an anchoring device is provided, including a mounting base, a tube body, and a fixing base. The tube body is located between the mounting base and the fixing base. The inner wall of the tube body is provided with an internal thread. The mounting base is provided with an external thread that matches the internal thread of the inner wall of the tube body. Both the mounting base and the fixing base are provided with tapered holes. The inner diameter of the tapered hole of the mounting base gradually increases in the direction away from the tube body, and the inner diameter of the tapered hole of the fixing base gradually decreases in the direction away from the tube body. A second limiting clamp is provided in the tapered hole of the mounting base, and a first limiting clamp is provided in the tapered hole of the fixing base. An elastic element is provided between the mounting base and the first limiting clamp.

[0007] The fixed base is equipped with a limiting component that allows the mounting base to move axially along the tube body, and the first limiting clamp includes two arc-shaped clamping pieces.

[0008] In this system, both the tapered holes of the mounting base and the fixed base are pierced by cables. Rotating the tube increases the distance between the mounting base and the fixed base, and the moving mounting base causes the cable inside the tapered hole of the fixed base to move towards the mounting base.

[0009] As a preferred embodiment of the present invention, it further includes a base, on which a hemispherical groove is provided, and a through hole is provided at the bottom of the hemispherical groove. The fixed seat is hemispherical in shape at the position away from the tube body, and the hemispherical position of the fixed seat is slidably connected to the hemispherical groove of the base.

[0010] As a preferred embodiment of the present invention, it further includes a base, wherein the base and the fixing seat are connected by a connecting component, and the base has a through hole at the position corresponding to the conical hole of the fixing seat.

[0011] As a preferred embodiment of the present invention, a locking block is fixed on one side of the inner edge of the clamping plate arc, and a locking groove is formed on the other side of the inner edge of the clamping plate arc.

[0012] When the two clips are fastened together, the locking block of one clip and the locking groove of the other clip slide and engage.

[0013] As a preferred embodiment of the present invention, a retainer is fixed on the tube body.

[0014] As a preferred embodiment of the present invention, the limiting component includes a guide rod, the fixed base and one end of the guide rod are fixedly connected, the mounting base is fixed with a limiting frame, and the limiting frame is provided with a sliding hole for the guide rod to pass through.

[0015] In a preferred embodiment of the present invention, the elastic element is a spring, and the spring is sleeved on the cable.

[0016] On the other hand, a cable anchoring device for a Nelson system arch bridge is also provided, including a mounting base, a tube, a fixing base, and a base. The tube is located between the mounting base and the fixing base. The inner wall of the tube has an internal thread. The mounting base has an external thread that matches the internal thread on the inner wall of the tube. Both the mounting base and the fixing base have tapered holes. The inner diameter of the tapered hole of the mounting base gradually increases away from the tube, and the inner diameter of the tapered hole of the fixing base gradually decreases away from the tube. A second limiting clamp is provided in the tapered hole of the mounting base, and a first limiting clamp is provided in the tapered hole of the fixing base. An elastic element is provided between the mounting base and the first limiting clamp.

[0017] The fixed base is equipped with a limiting component that allows the mounting base to move axially along the tube body, and the first limiting clamp includes two arc-shaped clamping pieces.

[0018] The base and the fixing seat are connected by a connecting component, and the base has a through hole at the position corresponding to the conical hole of the fixing seat.

[0019] In this system, both the tapered holes of the mounting base and the fixed base are pierced by cables. Rotating the tube increases the distance between the mounting base and the fixed base, and the moving mounting base causes the cable inside the tapered hole of the fixed base to move towards the mounting base.

[0020] The connecting assembly includes three support rods arranged at equal angles around the conical hole of the fixed seat. The two ends of the support rods are fixedly connected to the fixed seat and the base, respectively. The angle between the length direction of the support rod and the axial direction of the conical hole of the fixed seat is 5°-30°.

[0021] As a preferred embodiment of the present invention, a closed bag is fixed on the mounting base, the second limiting clamp is located inside the closed bag, one end of the base and the closing ring are fixedly connected, the other end of the closing ring is fixedly connected to the fixing base, and the connecting component is located inside the closing ring.

[0022] On another front, a cable anchoring device for a Nelson system arch bridge is also provided, comprising a mounting base, a tube, a fixing base, and a base. The tube is located between the mounting base and the fixing base. The inner wall of the tube has an internal thread. The mounting base has an external thread that matches the internal thread on the inner wall of the tube. Both the mounting base and the fixing base have tapered holes. The inner diameter of the tapered hole of the mounting base gradually increases away from the tube, and the inner diameter of the tapered hole of the fixing base gradually decreases away from the tube. A second limiting clamp is provided in the tapered hole of the mounting base, and a first limiting clamp is provided in the tapered hole of the fixing base. An elastic element is provided between the mounting base and the first limiting clamp.

[0023] The fixed base is equipped with a limiting component that allows the mounting base to move axially along the tube body, and the first limiting clamp includes two arc-shaped clamping pieces.

[0024] The base has a hemispherical groove, and the bottom of the hemispherical groove has a through hole. The fixed seat is hemispherical in shape away from the tube body, and the hemispherical position of the fixed seat is slidably connected to the hemispherical groove of the base.

[0025] It also includes a connecting assembly and a support base. The connecting assembly is located between the base and the support base. The connecting assembly includes three support rods arranged at equal angles around the conical hole of the fixing base. The two ends of the support rods are fixedly connected to the base and the support base, respectively. The support base has an opening corresponding to the position of the conical hole of the fixing base. The angle between the length direction of the support rod and the axial direction of the conical hole of the fixing base is 5°-30°.

[0026] In this system, both the tapered holes of the mounting base and the fixed base are pierced by cables. Rotating the tube increases the distance between the mounting base and the fixed base, and the moving mounting base causes the cable inside the tapered hole of the fixed base to move towards the mounting base.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. The anchoring device of the present invention, on the one hand, rotates the tube body to reduce the overlap length between the mounting base and the tube body, and the moving mounting base causes the cable in the conical hole of the fixed base to move in the direction of the mounting base, making the re-tensioning of the cable convenient and time-saving, less restricted by space, and reducing the difficulty and complexity of cable tensioning; on the other hand, the locking block of one of the clamping pieces and the locking groove of the other clamping piece slide and engage, avoiding axial misalignment of the two clamping pieces in the conical hole of the fixed base, ensuring the reliability of the first limiting clamp in fixing the cable; furthermore, when the direction of the cable changes, the cable drives the fixed base to rotate in the hemispherical groove, so that the direction of the tension force of the cable coincides with the axial direction of the conical hole of the fixed base, making the clamping of the cable by the two clamping pieces stable.

[0029] 2. In the example of the anchoring device of the present invention, during routine inspections, the worker rotates the pipe to increase the overlap length between the mounting base and the pipe. The worker judges the limiting effect of the first limiting clamp on the cable by observing whether the second limiting clamp moves outward from the conical hole of the mounting base, thereby reducing the workload of the inspection.

[0030] 3. The cable anchoring device for Nelson system arch bridges exemplified by this invention, on the one hand, during the impact process of the cable, the support rod bends and deforms, and the distance between the fixed seat and the base decreases, thereby buffering the impact on the cable and improving the reliability of this cable anchoring device for Nelson system arch bridges; on the other hand, during the bending deformation of the support rod, the cable drives the fixed seat to rotate in the hemispherical groove, so that the direction of the cable tension force coincides with the axial direction of the conical hole of the fixed seat, avoiding plastic deformation or breakage at the root of the cable and preventing cable damage. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of an embodiment of the anchoring device of the present invention;

[0032] Figure 2 for Figure 1 A partial sectional view of the structure;

[0033] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A;

[0034] Figure 4 This is a schematic diagram of the first limiting clamp structure of the present invention;

[0035] Figure 5 This is a schematic diagram of another embodiment of the anchoring device of the present invention;

[0036] Figure 6 This is a schematic diagram of an embodiment of the cable anchoring device for arch bridges based on the Nelson system of the present invention;

[0037] Figure 7This is a schematic diagram of another embodiment of the cable anchoring device for arch bridges based on the Nelson system of the present invention.

[0038] In the diagram: 1 Limiting frame, 2 Mounting seat, 3 Guide rod, 4 Tube body, 5 Card seat, 6 Fixing seat, 7 Base, 8 Cable, 9 First limiting clamp, 901 Card slot, 902 Card block, 903 Inner groove, 904 Clamping piece, 10 Second limiting clamp, 11 Elastic element, 12 Support rod, 13 Closing ring, 14 Closing bag, 15 Support seat. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] Example 1:

[0041] Please see Figures 1-4 This embodiment discloses an anchoring device, including a mounting base 2, a tube 4, and a fixing base 6. The tube 4 is located between the mounting base 2 and the fixing base 6. The inner wall of the tube 4 is provided with an internal thread. The mounting base 2 is provided with an external thread that matches the internal thread of the inner wall of the tube 4. One end of the tube 4 abuts against the fixing base 6. Both the mounting base 2 and the fixing base 6 are provided with tapered holes. The inner diameter of the tapered hole of the mounting base 2 gradually increases in the direction away from the tube 4, and the inner diameter of the tapered hole of the fixing base 6 gradually decreases in the direction away from the tube 4. A second limiting clamp 10 is provided in the tapered hole of the mounting base 2, and a first limiting clamp 9 is provided in the tapered hole of the fixing base 6. The axis of the tapered hole of the mounting base 2 and the axis of the tapered hole of the fixing base 6 coincide. An elastic element 11 is provided between the mounting base 2 and the first limiting clamp 9.

[0042] The fixed base 6 is equipped with a limiting component that allows the mounting base 2 to move axially along the tube body 4. The first limiting clamp 9 includes two arc-shaped clamping pieces 904.

[0043] Furthermore, the limiting assembly includes a guide rod 3, a fixed seat 6, and one end of the guide rod 3 is fixedly connected. A limiting frame 1 is fixed on the mounting base 2. The limiting frame 1 has a sliding hole through which the guide rod 3 passes. The limiting frame 1 and the guide rod 3 cooperate to move the mounting base 2 along the length direction of the guide rod 3.

[0044] Furthermore, the elastic element 11 is a spring, which is sleeved on the cable 8.

[0045] The working process and principle of this embodiment are as follows:

[0046] The fixing seat 6 is abutted against the external building or fixed to the external building. The worker passes one end of the cable 8 through the conical hole of the fixing seat 6 and the conical hole of the mounting seat 2. The first limiting clamp 9 is inserted into the conical hole of the fixing seat 6 and the second limiting clamp 10 is inserted into the conical hole of the mounting seat 2. The worker makes the internal thread of the tube body 4 engage with the external thread of the mounting seat 2, and then the external jack tensions the cable 8.

[0047] When the tension of cable 8 is lost due to factors such as temperature changes and metal creep, the worker rotates the tube 4 with an external tool to reduce the overlap length between the mounting base 2 and the tube 4. The moving mounting base 2 causes the cable 8 in the conical hole of the fixed base 6 to move in the direction of the mounting base 2. During the movement of cable 8 in the direction of the mounting base 2, the elastic element 11 keeps the two clamping pieces 904 of the first limiting clamp 9 always in the conical hole of the fixed base 6, ensuring the limiting effect of the first limiting clamp 9 on cable 8. This makes the retensioning of cable 8 convenient and time-saving, with less space restriction, and reduces the difficulty and complexity of cable tensioning.

[0048] Furthermore, during routine inspections, workers rotate the pipe body 4 to increase the overlap length between the mounting base 2 and the pipe body 4. Workers judge the limiting effect of the first limiting clamp 9 on the cable 8 by whether the second limiting clamp 10 moves outward from the conical hole of the mounting base 2: when the second limiting clamp 10 moves outward from the conical hole of the mounting base 2, it indicates that the first limiting clamp 9 is effective in limiting the cable 8; when the second limiting clamp 10 does not move outward from the conical hole of the mounting base 2, it indicates that the first limiting clamp 9 is ineffective in limiting the cable 8.

[0049] Furthermore, the first limiting clamp 9 and the second limiting clamp 10 have the same structure.

[0050] Example 2:

[0051] like Figure 4 As shown, this embodiment discloses an anchoring device, the structure of which is roughly the same as that of Embodiment 1. The difference is that in this embodiment, a locking block 902 is fixed on one side of the inner arc of the clamping piece 904, and a locking groove 901 is opened on the other side of the inner arc of the clamping piece 904.

[0052] The working process and principle of this embodiment are as follows:

[0053] When the two clips 904 are fastened to each other, the locking block 902 of one clip 904 and the locking groove 901 of the other clip 904 slide and engage, preventing the two clips 904 from being misaligned axially in the conical hole of the fixing seat 6, and ensuring the reliability of the first limiting clamp 9 in fixing the cable.

[0054] Example 3:

[0055] like Figure 5As shown, this embodiment discloses an anchoring device, the structure of which is roughly the same as that of Embodiment 1 or Embodiment 2. The difference is that this embodiment also includes a base 7, on which a hemispherical groove is provided, and a through hole is provided at the bottom of the hemispherical groove. The fixed seat 6 is hemispherical at the position away from the tube body 4, and the hemispherical position of the fixed seat 6 and the hemispherical groove of the base 7 are slidably fitted and connected.

[0056] The working process and principle of this embodiment are as follows:

[0057] The base 7 is fixed to the external building. When the direction of the cable 8 changes, the cable 8 drives the fixing seat 6 to rotate in the hemispherical groove, so that the tension direction of the cable 8 coincides with the axial direction of the conical hole of the fixing seat 6, and the two clamping plates 904 stabilize the clamping of the cable 8.

[0058] Example 4:

[0059] like Figure 1 , Figure 2 As shown, this embodiment discloses an anchoring device, the structure of which is roughly the same as that of Embodiment 1 or Embodiment 2. The difference is that this embodiment also includes a base 7. The base 7 and the fixing seat 6 are connected by a connecting component. The base 7 has a through hole at the position corresponding to the conical hole of the fixing seat 6.

[0060] The working process and principle of this embodiment are as follows:

[0061] The base 7 is fixed to the external building, which improves the installation stability of this anchoring device.

[0062] Furthermore, the connecting components are positioning bolts, clips, or adhesive.

[0063] Example 5:

[0064] like Figure 1 , Figure 2 As shown, this embodiment discloses an anchoring device, whose structure is roughly the same as that of Embodiment 1. The difference is that in this embodiment, a card seat 5 is fixed on the tube body 4.

[0065] The working process and principle of this embodiment are as follows:

[0066] The mounting bracket 5 is a fixed tube or a fixed rod. The external rod and the mounting bracket 5 are detachably connected. The tube 4 can be rotated by the cooperation of the external rod and the mounting bracket 5.

[0067] Example 6:

[0068] like Figure 7As shown, this embodiment discloses a cable anchoring device for a Nelson system arch bridge, including the anchoring device of embodiment four. The connecting component of this embodiment includes three support rods 12 arranged at equal angles around the conical hole of the fixing seat 6. The two ends of the support rods 12 are fixedly connected to the fixing seat 6 and the base 7, respectively. The angle between the length direction of the support rods 12 and the axial direction of the conical hole of the fixing seat 6 is 5°-30°.

[0069] The working process and principle of this embodiment are as follows:

[0070] The Nelson system arch bridge mainly consists of arch frames, cables, bridge deck, and abutments. The cables connect the arch frames and the bridge deck and bear the main suspension load. The Nelson system arch bridge is characterized by its relatively compact cable arrangement, which helps to distribute the load more evenly and improve the stability of the bridge. However, the cables are at high risk of being hit by out-of-control vehicles. When an out-of-control vehicle hits the cables, the load on the cables increases sharply, and the cables are at risk of breaking, which affects the overall safety of the Nelson system arch bridge.

[0071] When the cable 8 fixed on the cable anchoring device of the Ben Nelson system arch bridge is impacted, the support rod 12 bends and deforms, and the distance between the fixing seat 6 and the base 7 decreases, thereby buffering the impact on the cable 8 and improving the reliability of the cable anchoring device of the Ben Nelson system arch bridge.

[0072] Example 7:

[0073] like Figure 7 As shown, this embodiment discloses a cable anchoring device for a Nelson system arch bridge. Its structure is roughly the same as that of Embodiment Six. The difference is that in this embodiment, a closed bag 14 is fixed on the mounting base 2, the second limiting clamp 10 is located inside the closed bag 14, the base 7 and one end of the closed ring 13 are fixedly connected, the other end of the closed ring 13 is fixedly connected to the fixed base 6, and the connecting component is located inside the closed ring 13.

[0074] The working process and principle of this embodiment are as follows:

[0075] The closed ring 13 and the closed bag 14 keep the portion of the cable 8 exposed to the external building within a closed space, reducing the rate of oxidation and corrosion of the cable 8.

[0076] Example 8:

[0077] like Figure 6As shown, this embodiment discloses a cable anchoring device for a Nelson system arch bridge, including the anchoring device of Embodiment 3. This embodiment also includes a connecting component and a support base 15. The connecting component is located between the base 7 and the support base 15. The connecting component includes three support rods 12 arranged at equal angles around the conical hole of the fixing base 6. The two ends of the support rods 12 are fixedly connected to the base 7 and the support base 15 respectively. The support base 15 has an opening at the position corresponding to the conical hole of the fixing base 6. The angle between the length direction of the support rods 12 and the axial direction of the conical hole of the fixing base 6 is 5°-30°.

[0078] The working process and principle of this embodiment are as follows:

[0079] When the cable 8, which is fixed by the cable anchoring device of the Ben Nelson system arch bridge, is impacted, the support rod 12 bends and deforms, and the distance between the fixing seat 6 and the base 7 decreases, thereby buffering the impact on the cable 8 and improving the reliability of the cable anchoring device of the Ben Nelson system arch bridge.

[0080] During the bending deformation of the support rod 12, the cable 8 drives the fixing seat 6 to rotate in the hemispherical groove, so that the tension direction of the cable 8 coincides with the axial direction of the conical hole of the fixing seat 6, avoiding the cable 8 from being subjected to radial force, and avoiding plastic deformation or breakage at the root of the cable 8, thereby improving the reliability of the cable 8.

[0081] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. An anchoring device, characterized by: The utility model relates to a kind of pipe body and fixing seat, including mounting seat (2), pipe body (4) and fixing seat (6), the pipe body (4) is located between mounting seat (2) and fixing seat (6), the inner wall of the pipe body (4) is provided with internal thread, the mounting seat (2) is provided with external thread on the inner thread of pipe body (4) inner wall adaptation, the mounting seat (2) and fixing seat (6) are all provided with conical hole, the conical hole inner diameter of the mounting seat (2) gradually increases along the direction away from the pipe body (4), the conical hole inner diameter of the fixing seat (6) gradually decreases along the direction away from the pipe body (4), the conical hole of the mounting seat (2) is equipped with second limit clamp (10), the conical hole of the fixing seat (6) is equipped with first limit clamp (9), and the mounting seat (2) and first limit clamp (9) are equipped with elastic member (11) between; The fixing seat (6) is provided with a limiting assembly for moving the mounting seat (2) along the axial direction of the pipe body (4), and the first limit clamp (9) includes two arc-shaped clamping pieces (904). The conical hole of the mounting seat (2) and the conical hole of the fixing seat (6) are both penetrated by a cable (8), and rotating the pipe body (4) can increase the distance between the mounting seat (2) and the fixing seat (6), and the moving mounting seat (2) can move the cable (8) in the conical hole of the fixing seat (6) towards the mounting seat (2). The rotating pipe body (4) can increase the coincident length of the mounting seat (2) and the pipe body (4), and the limiting effect of the first limit clamp (9) on the cable (8) can be determined by whether the second limit clamp (10) moves outward from the conical hole of the mounting seat (2), i.e., when the second limit clamp (10) moves outward from the conical hole of the mounting seat (2), it indicates that the limiting effect of the first limit clamp (9) on the cable (8) is effective, and when the second limit clamp (10) does not move outward from the conical hole of the mounting seat (2), it indicates that the limiting effect of the first limit clamp (9) on the cable (8) is ineffective.

2. The anchoring device of claim 1, wherein: The utility model also includes a base (7), the base (7) is provided with a hemispherical recess, a through hole is formed in the bottom of the hemispherical recess, the position of the fixing seat (6) away from the pipe body (4) is hemispherical, and the hemispherical position of the fixing seat (6) is connected with the hemispherical recess of the base (7) in a sliding manner.

3. The anchoring device of claim 1, wherein: The utility model also includes a base (7), the base (7) and the fixing seat (6) are connected through a connecting assembly, and the base (7) is provided with a through hole corresponding to the position of the conical hole of the fixing seat (6).

4. An anchoring device according to claim 2 or 3, characterised in that: One side of the inner side of the clamping piece (904) is provided with a clamping block (902), and the other side of the inner side of the clamping piece (904) is provided with a clamping groove (901). When the two clamping pieces (904) are buckled towards each other, the clamping block (902) of one clamping piece (904) and the clamping groove (901) of the other clamping piece (904) are slidably connected.

5. The anchoring device of claim 1, wherein: The pipe body (4) is fixed with a clamping seat (5).

6. The anchoring device of claim 1, wherein: The limiting assembly includes a guide rod (3), the fixing seat (6) and one end of the guide rod (3) are fixedly connected, the mounting seat (2) is fixed with a limiting frame (1), and the limiting frame (1) is provided with a sliding hole for penetrating the guide rod (3).

7. The anchoring device of claim 1, wherein: The elastic member (11) is a spring, and the spring is sleeved on the cable (8).

8. A stay anchoring device for a Nielson system arch bridge, characterized by: The anchor device of claim 3, wherein the connecting assembly comprises three support rods (12) arranged at equal angles around the conical hole of the fixed seat (6), two ends of the support rods (12) being fixedly connected with the fixed seat (6) and the base (7) respectively, and an included angle between the length direction of the support rods (12) and the axial direction of the conical hole of the fixed seat (6) being 5-30°.

9. The cable anchorage device for a Nelson System arch bridge according to claim 8, characterized in that: A closed bag (14) is fixed on the mounting seat (2), the second limiting clamp (10) is located in the closed bag (14), one end of the base (7) and the closed ring (13) is fixedly connected, the other end of the closed ring (13) and the fixed seat (6) is fixedly connected, and the connecting assembly is located in the closed ring (13).

10. A stay anchoring device for a Nielson system arch bridge, characterized by: The anchor device of claim 2; The anchor device of claim 2 further comprises a connecting assembly and a support seat (15), the connecting assembly is located between the base (7) and the support seat (15), the connecting assembly comprises three support rods (12) arranged at equal angles around the conical hole of the fixed seat (6), two ends of the support rods (12) are fixedly connected with the base (7) and the support seat (15) respectively, the support seat (15) is provided with an opening at a position corresponding to the conical hole of the fixed seat (6), and an included angle between the length direction of the support rods (12) and the axial direction of the conical hole of the fixed seat (6) is 5-30°.

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