Anchoring device and inhaul cable anchoring device for Nelson system arch bridge

Abstract

The invention relates to the technical field of anchoring devices, and particularly discloses an anchoring device and an inhaul cable anchoring device.The anchoring device comprises a mounting base, a pipe body and a fixing base, internal threads are formed in the inner wall of the pipe body, and external threads matched with the internal threads of the inner wall of the pipe body are formed in the mounting base; conical holes are formed in the mounting seat and the fixing seat, the inner diameter of the conical hole of the mounting seat is gradually increased in the direction away from the pipe body, the inner diameter of the conical hole of the fixing seat is gradually decreased in the direction away from the pipe body, a second limiting clamp is arranged in the conical hole of the mounting seat, and a first limiting clamp is arranged in the conical hole of the fixing seat; according to the inhaul cable anchoring device for the Nelson system arch bridge, re-tensioning of the cable is convenient and time-saving, space limitation is small, the difficulty and complexity of cable tensioning are reduced, the impact borne by the cable is buffered, the cable is prevented from being damaged, the cable is prevented from being damaged, and the service life of the cable is prolonged. And the reliability of the inhaul cable anchoring device for the Nelson system arch bridge is improved.

Description

Technical Field

[0001] The invention relates to the technical field of anchoring devices, in particular to an anchoring device and a cable anchoring device for a Nelson system arch bridge. Background Art

[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 tapered hole of the anchor plate, and the wedge-shaped clip is placed into the tapered hole of the anchor plate. The cable is tensioned using a jack until it reaches the set stress value, and then the jack is slowly relaxed, and the clip clamps the cable to lock the cable.

[0003] Due to factors such as temperature changes and metal creep, the cable tensioning force may be lost, resulting in the need to use jacks to re-tension the cables. This not only takes a long time to operate, but also requires the demolition of part of the building structure when 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 a Nelson system arch bridge. The anchoring device is convenient and time-saving for re-tensioning the cable, is less restricted by space, and reduces the difficulty and complexity of cable tensioning. The cable anchoring device for the Nelson system arch bridge buffers the impact on the cable, thereby improving the reliability of the cable anchoring device for the Nelson system arch bridge.

[0005] The technical solution adopted by the present invention to solve the technical problem includes: On the one hand, an anchoring device is provided, including a mounting seat, a tube body and a fixing seat, the tube body being located between the mounting seat and the fixing seat, the inner wall of the tube body being provided with an internal thread, the mounting seat being provided with an external thread matching the internal thread on the inner wall of the tube body, the mounting seat and the fixing seat being provided with a conical hole, the inner diameter of the conical hole of the mounting seat gradually increasing in a direction away from the tube body, and the inner diameter of the conical hole of the fixing seat gradually decreasing in a direction away from the tube body, a second limiting clamp being provided in the conical hole of the mounting seat, a first limiting clamp being provided in the conical hole of the fixing seat, and an elastic member being provided between the mounting seat and the first limiting clamp.

[0006] The fixing seat is provided with a limiting assembly for enabling the mounting seat to move axially along the tube body, and the first limiting clamp comprises two arc-shaped clamping pieces.

[0007] The conical hole of the mounting seat and the conical hole of the fixing seat are both penetrated by the cable, and the rotating tube increases the distance between the mounting seat and the fixing seat, and the moving mounting seat causes the cable in the conical hole of the fixing seat to move toward the mounting seat.

[0008] As a preferred technical solution of the present invention, it also includes a base, which has a hemispherical groove, a through hole at the bottom of the hemispherical groove, and the position of the fixing seat away from the tube body is hemispherical, and the hemispherical position of the fixing seat is slidably connected to the hemispherical groove of the base.

[0009] As a preferred technical solution of the present invention, it also includes a base, the base and the fixing seat are connected through a connecting component, and the base is provided with a through hole at a position corresponding to the tapered hole of the fixing seat.

[0010] As a preferred technical solution of the present invention, a clamping block is fixed on one edge of the inner side of the clip arc, and a clamping groove is provided on the other edge of the inner side of the clip arc.

[0011] When the two clips are buckled toward each other, the clamping block of one of the clips is slidably engaged with the clamping groove of the other clip.

[0012] As a preferred technical solution of the present invention, a holder is fixed on the tube body.

[0013] As a preferred technical solution of the present invention, the limit assembly includes a guide rod, the fixing seat is fixedly connected to one end of the guide rod, a limit frame is fixed on the mounting seat, and a sliding hole is opened on the limit frame for the guide rod to pass through.

[0014] As a preferred technical solution of the present invention, the elastic member is a spring, and the spring is sleeved on the cable.

[0015] On the other hand, a cable anchoring device for a Nelson system arch bridge is also provided, comprising a mounting seat, a tube body, a fixing seat and a base, the tube body being located between the mounting seat and the fixing seat, the inner wall of the tube body being provided with an internal thread, the mounting seat being provided with an external thread matching the internal thread on the inner wall of the tube body, both the mounting seat and the fixing seat being provided with a conical hole, the inner diameter of the conical hole of the mounting seat gradually increasing in a direction away from the tube body, the inner diameter of the conical hole of the fixing seat gradually decreasing in a direction away from the tube body, a second limit clamp being provided in the conical hole of the mounting seat, a first limit clamp being provided in the conical hole of the fixing seat, and an elastic member being provided between the mounting seat and the first limit clamp.

[0016] The fixing seat is provided with a limiting assembly for enabling the mounting seat to move axially along the tube body, and the first limiting clamp comprises two arc-shaped clamping pieces.

[0017] The base and the fixing seat are connected via a connecting assembly, and a through hole is provided at a position of the base corresponding to the tapered hole of the fixing seat.

[0018] The conical hole of the mounting seat and the conical hole of the fixing seat are both penetrated by the cable, and the rotating tube increases the distance between the mounting seat and the fixing seat, and the moving mounting seat causes the cable in the conical hole of the fixing seat to move toward the mounting seat.

[0019] The connecting assembly includes three support rods arranged at equal angles around the tapered hole of the fixing seat, the two ends of the support rods are fixedly connected to the fixing seat and the base respectively, and the angle between the length direction of the support rod and the axial direction of the tapered hole of the fixing seat is 5°-30°.

[0020] As a preferred technical solution of the present invention, a closed bag is fixed on the mounting seat, the second limiting clamp is located in the closed bag, the base is fixedly connected to one end of the closed ring, the other end of the closed ring is fixedly connected to the fixed seat, and the connecting assembly is located in the closed ring.

[0021] On the other hand, a cable anchoring device for a Nelson system arch bridge is provided, comprising a mounting seat, a tube body, a fixing seat and a base, the tube body being located between the mounting seat and the fixing seat, the inner wall of the tube body being provided with an internal thread, the mounting seat being provided with an external thread matching the internal thread on the inner wall of the tube body, both the mounting seat and the fixing seat being provided with a tapered hole, the inner diameter of the tapered hole of the mounting seat gradually increasing in a direction away from the tube body, the inner diameter of the tapered hole of the fixing seat gradually decreasing in a direction away from the tube body, a second limit clamp being provided in the tapered hole of the mounting seat, a first limit clamp being provided in the tapered hole of the fixing seat, and an elastic member being provided between the mounting seat and the first limit clamp.

[0022] The fixing seat is provided with a limiting assembly for enabling the mounting seat to move axially along the tube body, and the first limiting clamp comprises two arc-shaped clamping pieces.

[0023] The base is provided with a hemispherical groove, the bottom of the hemispherical groove is provided with a through hole, the position of the fixing seat away from the tube body is hemispherical, and the hemispherical position of the fixing seat is slidably connected with the hemispherical groove of the base.

[0024] The invention also includes a connecting assembly and a support seat, wherein the connecting assembly is located between the base and the support seat, and the connecting assembly includes three support rods arranged at equal angles around the tapered hole of the fixing seat, and the two ends of the support rods are fixedly connected to the base and the support seat respectively, and the support seat is provided with an opening at a position corresponding to the tapered hole of the fixing seat, and the angle between the length direction of the support rod and the axial direction of the tapered hole of the fixing seat is 5°-30° The conical hole of the mounting seat and the conical hole of the fixing seat are both penetrated by the cable, and the rotating tube increases the distance between the mounting seat and the fixing seat, and the moving mounting seat causes the cable in the conical hole of the fixing seat to move toward the mounting seat.

[0025] Compared with the prior art, the present invention has the following beneficial effects: 1. The anchoring device of the example of the present invention, on the one hand, rotates the tube body to reduce the overlapping length of the mounting seat and the tube body, and the moving mounting seat causes the cable in the tapered hole of the fixing seat to move toward the direction of the mounting seat, which makes it convenient and time-saving to re-tension the cable, is less restricted by space, and reduces the difficulty and complexity of cable tensioning; on the other hand, the block of one of the clips and the slot of the other clip are slidably engaged to avoid the axial misalignment of the two clips in the tapered hole of the fixing seat, thereby ensuring the reliability of the first limit clamp in fixing the cable; on the other hand, when the direction of the cable changes, the cable drives the fixing seat to rotate in the hemispherical groove, so that the tensioning force direction of the cable coincides with the axial direction of the tapered hole of the fixing seat, so that the two clips can clamp the cable stably.

[0026] 2. In the anchoring device of the example of the present invention, during daily inspections, workers rotate the tube body to increase the overlapping length of the mounting seat and the tube body. The workers determine the limiting effect of the first limiting clamp on the cable by observing whether the second limiting clamp moves outward from the tapered hole of the mounting seat, thereby reducing the workload of inspections.

[0027] 3. The cable anchoring device for an arch bridge of the Nelson system of the present invention, on the one hand, when the cable is hit, the support rod is bent and deformed, and the distance between the fixing seat and the base becomes smaller, thereby buffering the impact on the cable and improving the reliability of the cable anchoring device for an arch bridge of the Nelson system; on the other hand, when the support rod is bent and deformed, the cable drives the fixing seat to rotate in the hemispherical groove, so that the tension direction of the cable coincides with the axial direction of the conical hole of the fixing seat, thereby avoiding plastic deformation or fracture at the root of the cable and avoiding damage to the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of an embodiment of an anchoring device of the present invention; Figure 2 for Figure 1 A schematic diagram of a partial cross-sectional structure; Figure 3 for Figure 2 A schematic diagram of the structure at A; Figure 4 It is a schematic diagram of the first limiting clamp structure of the present invention; Figure 5 It is a structural schematic diagram of another embodiment of the anchoring device of the present invention; Figure 6 It is a schematic structural diagram of an embodiment of a cable anchoring device for a Nelson system arch bridge of the present invention; Figure 7 It is a schematic structural diagram of another embodiment of the cable anchoring device for a Nelson system arch bridge of the present invention.

[0029] In the figure: 1 a limiting frame, 2 a mounting seat, 3 a guide rod, 4 a tube body, 5 a clamping seat, 6 a fixing seat, 7 a base, 8 a cable, 9 a first limiting clamp, 901 a clamping slot, 902 a clamping block, 903 an inner groove, 904 a clip, 10 a second limiting clamp, 11 an elastic member, 12 a supporting rod, 13 a closing ring, 14 a closing bag, and 15 a supporting seat. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all 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: See also Figure 1-Figure 4 The present embodiment discloses an anchoring device, comprising a mounting seat 2, a tube body 4 and a fixing seat 6, wherein the tube body 4 is located between the mounting seat 2 and the fixing seat 6, an inner thread is provided on the inner wall of the tube body 4, an outer thread is provided on the mounting seat 2 which matches the inner thread of the inner wall of the tube body 4, one end of the tube body 4 is against the fixing seat 6, and a tapered hole is provided on both the mounting seat 2 and the fixing seat 6, the inner diameter of the tapered hole of the mounting seat 2 gradually increases in the direction away from the tube body 4, and the inner diameter of the tapered hole of the fixing seat 6 gradually decreases in the direction away from the tube body 4, a second limiting clip 10 is provided in the tapered hole of the mounting seat 2, a first limiting clip 9 is provided in the tapered hole of the fixing seat 6, the axis of the tapered hole of the mounting seat 2 coincides with the axis of the tapered hole of the fixing seat 6, and an elastic member 11 is provided between the mounting seat 2 and the first limiting clip 9.

[0032] A limiting assembly is installed on the fixing seat 6 to enable the mounting seat 2 to move axially along the tube body 4 . The first limiting clip 9 includes two arc-shaped clips 904 .

[0033] Furthermore, the limit assembly includes a guide rod 3, a fixed seat 6 and one end of the guide rod 3 are fixedly connected, a limit frame 1 is fixed on the mounting seat 2, and a sliding hole is provided on the limit frame 1 for the guide rod 3 to pass through. The limit frame 1 and the guide rod 3 cooperate to enable the mounting seat 2 to move along the length direction of the guide rod 3.

[0034] Furthermore, the elastic member 11 is a spring, and the spring is sleeved on the cable 8 .

[0035] The working process and principle of this embodiment are: The fixing seat 6 is against the external building or the fixing seat 6 is fixed to the external building, and the worker makes one end of the cable 8 pass through the tapered hole of the fixing seat 6 and the tapered hole of the mounting seat 2, and the first limiting clip 9 is placed into the tapered hole of the fixing seat 6, and the second limiting clip 10 is placed into the tapered 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.

[0036] When the tensioning force of the cable 8 is lost due to factors such as temperature change and metal creep, the worker rotates the tube body 4 through an external tool to reduce the overlapping length of the mounting seat 2 and the tube body 4. The moving mounting seat 2 causes the cable 8 in the conical hole of the fixing seat 6 to move toward the mounting seat 2. During the movement of the cable 8 toward the mounting seat 2, the elastic member 11 causes the two clips 904 of the first limiting clamp 9 to always be located in the conical hole of the fixing seat 6, thereby ensuring the limiting effect of the first limiting clamp 9 on the cable 8, making the re-tensioning of the cable 8 convenient and time-saving, with less space restriction, and reducing the difficulty and complexity of cable tensioning.

[0037] Furthermore, during the workers' daily inspections, the workers rotate the tube body 4 to increase the overlapping length of the mounting seat 2 and the tube body 4, and the workers judge the limiting effect of the first limit clamp 9 on the cable 8 by whether the second limit clamp 10 moves outward from the tapered hole of the mounting seat 2: when the second limit clamp 10 moves outward from the tapered hole of the mounting seat 2, it indicates that the limiting effect of the first limit clamp 9 on the cable 8 is effective; when the second limit clamp 10 does not move outward from the tapered hole of the mounting seat 2, it indicates that the limiting effect of the first limit clamp 9 on the cable 8 has failed.

[0038] Furthermore, the first limiting clamp 9 and the second limiting clamp 10 have the same structure.

[0039] Embodiment 2: like Figure 4 As shown, this embodiment discloses an anchoring device, whose structure is substantially the same as that of the first embodiment, except that a clamping block 902 is fixed to one edge of the inner arc of the clip 904 of this embodiment, and a clamping groove 901 is provided on the other edge of the inner arc of the clip 904.

[0040] The working process and principle of this embodiment are: When the two clips 904 are buckled toward each other, the block 902 of one of the clips 904 and the slot 901 of the other clip 904 are slidably engaged with each other, thereby preventing the two clips 904 from being misaligned axially in the tapered hole of the fixing seat 6, thereby ensuring the reliability of the first limit clip 9 in fixing the cable.

[0041] Embodiment three: like Figure 5As shown, this embodiment discloses an anchoring device, whose structure is roughly the same as that of embodiment one or embodiment two, except that this embodiment also includes a base 7, a hemispherical groove is provided on the base 7, a through hole is provided at the bottom of the hemispherical groove, the position of the fixing seat 6 away from the tube body 4 is hemispherical, and the hemispherical position of the fixing seat 6 is slidably fitted with the hemispherical groove of the base 7.

[0042] The working process and principle of this embodiment are: The base 7 is fixed on an 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, so that the two clips 904 can clamp the cable 8 stably.

[0043] Embodiment 4: like Figure 1 , Figure 2 As shown, this embodiment discloses an anchoring device, whose structure is roughly the same as that of embodiment one or embodiment two, except that this embodiment also includes a base 7, the base 7 and the fixing seat 6 are connected by a connecting assembly, and a through hole is opened at the position of the base 7 corresponding to the conical hole of the fixing seat 6.

[0044] The working process and principle of this embodiment are: The base 7 is fixed on an external building to improve the installation firmness of the anchoring device.

[0045] Furthermore, the connecting component is a positioning bolt, a buckle or glue.

[0046] Embodiment five: like Figure 1 , Figure 2 As shown, this embodiment discloses an anchoring device, and its structure is substantially the same as that of the first embodiment, except that a holder 5 is fixed on the tube body 4 of this embodiment.

[0047] The working process and principle of this embodiment are: The holder 5 is a fixed tube or a fixed rod, and the external rod body and the holder 5 are detachably connected, and the tube body 4 can be rotated conveniently through the cooperation between the external rod body and the holder 5 .

[0048] Embodiment six: like Figure 7 As shown, this embodiment discloses a cable anchoring device for a Nelson system arch bridge, including the anchoring device of embodiment four. The connecting assembly of this embodiment includes three support rods 12 arranged at equal angles around the tapered hole of the fixing seat 6, and the two ends of the support rod 12 are fixedly connected to the fixing seat 6 and the base 7 respectively. The angle between the length direction of the support rod 12 and the axial direction of the tapered hole of the fixing seat 6 is 5°-30°.

[0049] The working process and principle of this embodiment are: The Nelson system arch bridge is mainly composed of an arch frame, cables, bridge deck and abutments. The cables are used to connect the arch frame 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 there is a risk of the cables breaking, affecting the overall safety of the Nelson system arch bridge.

[0050] When the cable 8 fixed on the cable anchoring device for arch bridge of the Ben Nelson system is hit, the support rod 12 bends and deforms, and the distance between the fixing seat 6 and the base 7 becomes smaller, so as to buffer the impact on the cable 8 and improve the reliability of the cable anchoring device for arch bridge of the Ben Nelson system.

[0051] Embodiment seven: like Figure 7 As shown, this embodiment discloses a cable anchoring device for a Nelson system arch bridge, and its structure is roughly the same as that of the sixth embodiment, except that a closed bag 14 is fixed on the mounting seat 2 of this embodiment, the second limit clamp 10 is located in the closed bag 14, the base 7 is fixedly connected to one end of the closed ring 13, the other end of the closed ring 13 is fixedly connected to the fixed seat 6, and the connecting assembly is located in the closed ring 13.

[0052] The working process and principle of this embodiment are: The closing ring 13 and the closing bag 14 allow the portion of the cable 8 exposed to the outside building to be located in a closed space, thereby reducing the oxidation corrosion rate of the cable 8 .

[0053] Embodiment eight: like Figure 6 As shown, this embodiment discloses a cable anchoring device for a Nelson system arch bridge, including the anchoring device of embodiment three. This embodiment also includes 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 includes three support rods 12 arranged at equal angles around the tapered hole of the fixing seat 6. The two ends of the support rod 12 are fixedly connected to the base 7 and the support seat 15 respectively. The support seat 15 is provided with an opening at the position corresponding to the tapered hole of the fixing seat 6. The angle between the length direction of the support rod 12 and the axial direction of the tapered hole of the fixing seat 6 is 5°-30°.

[0054] The working process and principle of this embodiment are: When the cable 8 fixed by the cable anchoring device for the Ben Nelson system arch bridge is hit, the support rod 12 bends and deforms, and the distance between the fixing seat 6 and the base 7 becomes smaller, thereby buffering the impact on the cable 8 and improving the reliability of the cable anchoring device for the Ben Nelson system arch bridge.

[0055] 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 tensioning force direction of the cable 8 coincides with the axial direction of the conical hole of the fixing seat 6, thereby preventing the cable 8 from being subjected to radial force and preventing the root of the cable 8 from plastic deformation or fracture, thereby improving the reliability of the cable 8.

[0056] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. An anchoring device, characterized in that: The invention comprises a mounting seat (2), a tube body (4) and a fixing seat (6), wherein the tube body (4) is located between the mounting seat (2) and the fixing seat (6), an inner wall of the tube body (4) is provided with an internal thread, and the mounting seat (2) is provided with an external thread adapted to the internal thread of the inner wall of the tube body (4), and both the mounting seat (2) and the fixing seat (6) are provided with a tapered hole, the inner diameter of the tapered hole of the mounting seat (2) gradually increases in a direction away from the tube body (4), and the inner diameter of the tapered hole of the fixing seat (6) gradually decreases in a direction away from the tube body (4), a second limiting clip (10) is provided in the tapered hole of the mounting seat (2), a first limiting clip (9) is provided in the tapered hole of the fixing seat (6), and an elastic member (11) is provided between the mounting seat (2) and the first limiting clip (9); A limiting assembly is mounted on the fixing seat (6) to enable the mounting seat (2) to move axially along the tube body (4), and the first limiting clamp (9) comprises 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 the cable (8), and the distance between the mounting seat (2) and the fixing seat (6) is increased by rotating the tube body (4), and the moving mounting seat (2) causes the cable (8) in the conical hole of the fixing seat (6) to move toward the mounting seat (2).

2. The anchoring device according to claim 1, characterized in that: It also comprises a base (7), the base (7) being provided with a hemispherical groove, the bottom of the hemispherical groove being provided with a through hole, the position of the fixing seat (6) away from the tube body (4) being hemispherical, the hemispherical position of the fixing seat (6) being slidably connected to the hemispherical groove of the base (7).

3. The anchoring device according to claim 1, characterized in that: It also comprises a base (7), the base (7) and the fixing base (6) being connected via a connecting assembly, and a through hole is provided in the base (7) at a position corresponding to the conical hole of the fixing base (6).

4. The anchoring device according to claim 2 or 3, characterized in that: A clamping block (902) is fixed to one edge of the inner side of the arc of the clamping piece (904), and a clamping groove (901) is formed on the other edge of the inner side of the arc of the clamping piece (904); When the two clips (904) are buckled toward each other, the clamping block (902) of one of the clips (904) and the clamping groove (901) of the other clip (904) are slidably engaged.

5. The anchoring device according to claim 1, characterized in that: A clamping seat (5) is fixed on the tube body (4).

6. The anchoring device according to claim 1, characterized in that: The limit assembly comprises a guide rod (3), the fixing seat (6) is fixedly connected to one end of the guide rod (3), a limit frame (1) is fixed on the mounting seat (2), and a sliding hole is provided on the limit frame (1) for the guide rod (3) to pass through.

7. The anchoring device according to claim 1, characterized in that: The elastic member (11) is a spring, and the spring is sleeved on the cable (8).

8. A cable anchoring device for a Nelson system arch bridge, characterized in that: The anchoring device comprises the anchoring device according to claim 3, wherein the connecting assembly comprises three support rods (12) arranged at equal angles around the tapered hole of the fixing seat (6), the two ends of the support rods (12) are respectively fixedly connected to the fixing seat (6) and the base (7), and the angle between the length direction of the support rods (12) and the axial direction of the tapered hole of the fixing seat (6) is 5°-30°.

9. The cable anchoring 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), the base (7) is fixedly connected to one end of the closed ring (13), the other end of the closed ring (13) is fixedly connected to the fixed seat (6), and the connecting assembly is located in the closed ring (13).

10. A cable anchoring device for a Nelson system arch bridge, characterized in that: comprising the anchoring device of claim 2; The invention also comprises a connecting assembly and a support seat (15), wherein the connecting assembly is located between the base (7) and the support seat (15), and the connecting assembly comprises three support rods (12) arranged at equal angles around the tapered hole of the fixing seat (6), the two ends of the support rods (12) are respectively fixedly connected to the base (7) and the support seat (15), and the support seat (15) is provided with an opening at a position corresponding to the tapered hole of the fixing seat (6), and the angle between the length direction of the support rods (12) and the axial direction of the tapered hole of the fixing seat (6) is 5°-30°.

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