A safety rope device and safety protection method for working on tied arch bridges

Abstract

This invention relates to the field of tied-arch bridge construction technology, specifically to a safety rope device and safety protection method for tied-arch bridge construction. The safety rope device includes a main body, which comprises multiple clamp assemblies located at the suspenders and a safety rope connecting each clamp assembly. Each clamp assembly has a fixing mechanism and a tightening mechanism that cooperate with the safety rope. The fixing mechanism secures the safety rope to the clamp assembly, and the tightening mechanism maintains the tightening tendency of the safety rope. The safety protection method is implemented using the aforementioned safety rope device. The safety rope device of this invention provides better safety protection for construction workers and imposes fewer restrictions on their movement, thus improving the safety and efficiency of tied-arch bridge construction operations.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tied-arch bridge operation, in particular to a safety rope device for tied-arch bridge operation and a safety protection method. BACKGROUND

[0002] When a new tied-arch bridge is constructed by using the integral hoisting method, the assembly is completed at the assembly site, and then hoisting is performed. The tied-arch concrete pouring, the mid-beam hoisting and the mid-beam tensioning are all high-altitude operations on water, and the safety belt cannot be hung at a firm position, which easily forms a safety hazard. The commonly used safety protection method is to wrap the safety rope around the outer sleeve of the suspender to protect the construction personnel, so as to prevent the construction personnel from falling, but this method requires the construction personnel to carry more safety ropes, which greatly affects their construction operation. SUMMARY

[0003] The present application provides a safety rope device for tied-arch bridge operation and a safety protection method, which can overcome some or some defects of the prior art.

[0004] The safety rope device for tied-arch bridge operation according to the present application comprises a device body, the device body comprises a plurality of hoop assemblies for being arranged at the suspender and a safety rope connecting the hoop assemblies, a fixing mechanism and a tightening mechanism are arranged at the hoop assembly and cooperate with the safety rope, the fixing mechanism is used for fixedly cooperating the safety rope with the hoop assembly, and the tightening mechanism is used for keeping the safety rope in a tightened state.

[0005] In the present application, the hoop assembly can be fixedly cooperated with the suspender, so that a fixed hanging point capable of cooperating with the safety rope can be preferably provided at the suspender, and thus the safety rope can be preferably hung at a specified height; the fixing mechanism can fix the safety rope with the hoop assembly, so that the length of the safety rope between adjacent hoop assemblies can be preferably controlled, and the adjacent safety rope segments will not interfere with each other; and the tightening mechanism can straighten part of the safety rope to keep the safety rope in a tightened state, so that the minimum height of the safety rope between the adjacent two hoop assemblies can be preferably adjusted within a certain range.

[0006] As a preferred, the hoop assembly comprises two hoop members cooperated with each other, the two hoop members form an installation hole when cooperating.

[0007] In the present application, by arranging the two hoop members cooperated with each other, the installation and disassembly of the hoop assembly are preferably facilitated, the installation hole can be preferably cooperated with the suspender, so that the hoop assembly can be preferably stably fixed at the suspender.

[0008] As preferred, one end of the hoop component along the length direction forms a short plate, the other end forms a long plate, a plurality of first fastening holes are formed at the short plate and are arranged in a penetrating manner, a first fastening bolt is arranged in the first fastening hole, a first fastening nut is arranged at the first fastening bolt, and the first fastening bolt is in threaded cooperation with the first fastening nut.

[0009] In the present application, the cooperation of the two hoop components can be preferably realized through the first fastening bolt and the first fastening nut, and thus the cooperation of the hoop assembly and the boom can be preferably realized.

[0010] As preferred, the fixing mechanism comprises a rope penetrating hole formed at the long plate in a penetrating manner, the rope penetrating hole being used for penetrating the safety rope; a fixing wedge is arranged at the rope penetrating hole, the fixing wedge comprising two half-circular wedge blocks in cooperation with each other, the two half-circular wedge blocks being used for cooperating with the safety rope; the half-circular wedge block comprises a wedge block main body, one end of the wedge block main body forms a cooperation disc, a half-circular hole is formed at the center of the cooperation disc, and the radius of the half-circular hole gradually decreases along the axial direction.

[0011] In the present application, the safety rope can be conveniently penetrated through the rope penetrating hole, and thus the series connection of the hoop assemblies can be conveniently realized; the fixing wedge cooperating with the rope penetrating hole can preferably clamp the safety rope, and thus the interference of the safety rope between the adjacent hoop assemblies can be preferably avoided.

[0012] As preferred, a plurality of first cooperation holes are formed at the cooperation disc in a penetrating manner, a first fastening screw is arranged at the first cooperation hole, a first fastening thread hole is correspondingly formed at the long plate, and the first fastening screw is in threaded cooperation with the first fastening thread hole.

[0013] In the present application, the cooperation of the first fastening screw and the first fastening thread hole can fix the cooperation of the fixing wedge and the rope penetrating hole, and at the same time, the two half-circular wedge blocks can be kept in close contact, so as to preferably lock the safety rope.

[0014] As preferred, the tightening mechanism comprises a support plate arranged at the long plate, a first support frame and a second support frame are formed at the support plate along the length direction and are spaced apart, a first support hole is formed at the first support frame, and a second support hole is formed at the second support frame; a support bolt is arranged in the first support hole and the second support hole, the support bolt is provided with a rotating rod and a limiting nut away from the second support frame, the limiting nut is in threaded cooperation with the support bolt, and the limiting nut is used for limiting the activity range of the rotating rod; a rotating hole is formed at one end of the rotating rod close to the support bolt, and the rotating hole is used for rotating cooperation with the support bolt; a torsion spring is arranged between the rotating rod and the second support frame, a second cooperation hole is formed at the second support frame and is used for cooperating with one end of the torsion spring, a cooperation groove is formed at the rotating rod and is used for cooperating with the other end of the torsion spring.

[0015] In the application, the first support frame and the second support frame can provide support for the support bolt, the rotating rod can rotate axially around the support bolt, so that the height of the lowest point of the adjacent hoop safety rope can be adjusted better, the limiting nut can limit the activity range of the rotating rod, and the rotating rod and the support bolt are prevented from being separated better; the torsion spring can keep the rotating rod in a trend of being perpendicular to the ground, since the safety rope between the adjacent two hoops presents an arc shape in a natural suspended state due to gravity, the safety rope near the hoop can be kept in a vertical state through the cooperation of the rotating rod and the safety rope, so that an adjustable range is provided for the height of the lowest point of the safety rope, and therefore the construction work of the construction personnel is facilitated better.

[0016] Preferably, an end of the rotating rod away from the support bolt is provided with a pulley support, the pulley support is provided with a fixed pulley, the fixed pulley is used for cooperating with the safety rope, and the pulley support is formed with a limiting frame at one end, and the limiting frame is used for limiting the position of the safety rope.

[0017] In the application, the fixed pulley is provided, the friction between the safety rope and the rotating rod is reduced better, the wear of the safety rope is reduced, and the safety is improved, the limiting frame is provided, the safety rope is inserted into the limiting frame, the cooperation between the safety rope and the fixed pulley can be achieved better, and the safety rope is prevented from being separated from the cooperation with the rotating rod.

[0018] Preferably, a plurality of second fastening holes penetrating through the support plate are formed, a second fastening bolt is arranged in the second fastening hole, a third fastening hole is formed at the long plate in correspondence, the second fastening bolt cooperates with the second fastening hole and the third fastening hole, a second fastening nut is arranged at the second fastening bolt, and the second fastening nut is threadedly connected with the second fastening bolt.

[0019] In the application, the second fastening bolt and the second fastening nut are arranged, the two support plates and the two hoop members are cooperated better, and the cooperation between the hoop assembly and the suspender is further strengthened.

[0020] Preferably, the two hoop members are provided with a plurality of reinforcing supports at the bottom, the reinforcing supports cooperate with the two hoop members and the support plate, the support plate comprises a bottom plate and side plates formed at both ends of the bottom plate in the width direction, fourth fastening holes are formed at the bottom plate, a second fastening screw is arranged at the fourth fastening hole, second fastening screw holes are formed at the hoop member, the second fastening screw is threadedly connected with the second fastening screw hole, fifth fastening holes are formed at the side plate, a third fastening screw is arranged at the fifth fastening hole, third fastening screw holes are formed at the hoop member, and the third fastening screw is threadedly connected with the third fastening screw hole.

[0021] In the application, the reinforcing supports are arranged, the cooperation stability between the support plate and the hoop member is improved better, and the deformation of the support plate is prevented.

[0022] The safety protection method for tied-arch bridge operation according to the present application is realized by using the safety rope device for tied-arch bridge operation described above, and comprises the following steps:

[0023] Step S1: Before the whole hoisting of the tied-arch bridge, the hoop assembly and the tightening mechanism are installed at each suspender;

[0024] Step S2: One safety rope is used to pass through the rope passing holes and the limiting frames at each hoop assembly;

[0025] Step S3: After adjusting the length of the safety rope at the adjacent hoop assemblies, the fixing mechanism is matched with the rope passing hole;

[0026] Step S4: The reinforcing support is matched with the supporting plate and the hoop member.

[0027] In the present application, the assembly of the hoop assembly and the safety rope is set before hoisting, which preferably improves the work efficiency, improves the safety of the installation and use of the safety rope, and is easy to disassemble and assemble, and is convenient for the construction personnel to perform construction operation. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The assembly method of the safety rope device for tied-arch bridge operation in Example 2;

[0029] Figure 2 The axial side schematic view of the device body in Example 1;

[0030] Figure 3 The axial side schematic view of the device body in Example 1;

[0031] Figure 4 The axial side schematic view of the hoop member in Example 1;

[0032] Figure 5 The axial side schematic view of the half-round wedge in Example 1;

[0033] Figure 6 The axial side schematic view of the supporting plate in Example 1;

[0034] Figure 7 The axial side schematic view of the rotating rod in Example 1;

[0035] Figure 8 The right side schematic view of the device body in Example 1;

[0036] Figure 9 The axial side schematic view of the reinforcing support in Example 1;

[0037] Figure 10 The lower side schematic view of the hoop member in Example 1;

[0038] Figure 11A rear view schematic diagram of the support plate in Example 1. DETAILED DESCRIPTION

[0039] In order to further understand the content of the present application, the present application will be described in detail with examples. It should be understood that the examples are only used to explain the present application but not to limit the present application.

[0040] Example 1

[0041] In combination Figure 2 As shown in the drawings, the present embodiment provides a safety rope device for tied-arch bridge operation, which comprises a device body 200, the device body 200 comprises a plurality of hoop assemblies 210 for being arranged at the hanger rods and a safety rope connecting the hoop assemblies 210, the hoop assemblies 210 are provided with a fixing mechanism 220 and a tightening mechanism 230 matched with the safety rope, the fixing mechanism 220 is used for fixedly matching the safety rope with the hoop assembly 210, and the tightening mechanism 230 is used for keeping the safety rope in a tightening state.

[0042] According to the scheme provided by the present embodiment, the hoop assembly 210 can be fixedly matched with the hanger rod, so that a fixed hanging point matched with the safety rope can be preferably provided at the hanger rod, and thus the safety rope can be preferably hung at a specified height; the fixing mechanism 220 can fix the safety rope with the hoop assembly 210, so that the length of the safety rope between adjacent hoop assemblies 210 can be preferably controlled, and the adjacent safety rope segments will not interfere with each other; the tightening mechanism 230 can straighten part of the safety rope to keep the safety rope in a tightening state, so that the minimum height of the safety rope between the adjacent two hoop assemblies 210 can be preferably adjusted within a certain range.

[0043] When the safety rope device of the present embodiment is installed, the hoop assemblies 210 are matched with the hanger rods and adjusted to a suitable height before the whole hoisting operation, and then the tightening mechanism 230 and the safety rope are installed, the safety rope is matched with each hoop assembly 210 and the tightening mechanism 230, and the fixing mechanism 220 is used to fix the safety rope with the hoop assembly 210 after adjusting the length of the safety rope between the adjacent two hoop assemblies 210.

[0044] When the safety rope device of the present embodiment is used, the fixing end of the safety belt is matched with the safety rope, and the construction personnel can perform high-altitude operation, the tightening mechanism 230 can keep the safety rope in a relaxed state when the construction personnel performs high-altitude operation, so that the construction personnel's operation is preferably facilitated, the interference with the movement of the construction personnel is reduced, and the construction personnel does not need to carry a long safety belt, thereby reducing the load of the construction personnel and preferably improving the work efficiency; when the construction personnel accidentally falls, the fixing mechanism 220 can lock the safety rope at the hoop assembly 210, so that the construction personnel is preferably prevented from being hung in the air by the safety belt, thereby facilitating the construction personnel to save himself or the rescue personnel to rescue the construction personnel.

[0045] As shown in Figures 2-3 The hoop assembly 210 includes two hoop members 311 that cooperate to form a mounting hole 312 for cooperating with the boom.

[0046] The two hoop members 311 cooperate to facilitate the installation and removal of the hoop assembly 210, and the mounting hole 312 can cooperate with the boom, so that the hoop assembly 210 can be stably fixed to the boom.

[0047] It can be understood that the hoop member 311 is made of high-strength manganese alloy steel, which can preferably ensure the rigidity of the hoop assembly 210, thereby preferably improving the stability of the hoop assembly 210 when cooperating with the boom.

[0048] As shown in Figures 3-4 The hoop member 311 has a short plate 4111 at one end and a long plate 4112 at the other end along the length direction, a plurality of first fastening holes 4113 are formed at the short plate 4111 and penetrate through, a first fastening bolt 313 is arranged in the first fastening hole 4113, a first fastening nut 314 is arranged at the first fastening bolt 313, and the first fastening bolt 313 and the first fastening nut 314 are threadedly connected.

[0049] The first fastening bolt 313 and the first fastening nut 314 can preferably cooperate with the two hoop members 311, so that the hoop assembly 210 can preferably cooperate with the boom.

[0050] As shown in Figures 2-5 The fixing mechanism 220 includes a rope penetrating hole 4114 formed in the long plate 4112 and penetrating through, and the rope penetrating hole 4114 is used for penetrating the safety rope; the rope penetrating hole 4114 is provided with a fixing wedge 321, and the fixing wedge 321 includes two semicircular wedge blocks 3211 that cooperate with each other and are used for cooperating with the safety rope; the semicircular wedge block 3211 includes a wedge block body 5211a, one end of the wedge block body 5211a forms a cooperation disc 5211b, a semicircular hole 5211c is formed at the center of the cooperation disc 5211b, and the radius of the semicircular hole 5211c gradually decreases along the axial direction.

[0051] The rope penetrating hole 4114 can facilitate the penetration of the safety rope, thereby preferably facilitating the connection of the hoop assemblies 210, and the fixing wedge 321 cooperating with the rope penetrating hole 4114 can preferably clamp the safety rope, thereby preferably avoiding interference between the safety ropes of adjacent hoop assemblies 210.

[0052] It can be understood that the minimum radius of the semicircular hole 5211c is smaller than the diameter of the safety rope, so the fixing wedge 321 can preferably compress and lock the safety rope.

[0053] In combination Figures 3-5 As shown, a plurality of first matching holes 5211d are formed through the matching disc 5211b, and a first fastening screw 322 is arranged at the first matching hole 5211d. A first fastening threaded hole 3115 is formed corresponding to the first fastening screw 322 on the long plate 4112, and the first fastening screw 322 is threadedly matched with the first fastening threaded hole 3115.

[0054] The first fastening screw 322 and the first fastening threaded hole 3115 are matched to fix the fixing wedge 321 with the rope passing hole 4114, and at the same time, the two semicircular wedge blocks 3211 can be kept in close contact, thereby preferably locking the safety rope.

[0055] In combination Figures 2-6 As shown, the tightening mechanism 230 includes a support plate 331 arranged on the long plate 4112. The support plate 331 is spaced apart along the length direction to form a first support frame 6311 and a second support frame 6312. The first support frame 6311 is formed with a first support hole 6313, and the second support frame 6312 is formed with a second support hole 6314. A support bolt 332 is arranged in the first support hole 6313 and the second support hole 6314. The support bolt 332 is arranged with a rotating rod 333 and a limiting nut 334 away from the second support frame 6312. The limiting nut 334 is threadedly matched with the support bolt 332, and the limiting nut 334 is used to limit the movement range of the rotating rod 333. The rotating rod 333 is formed with a rotating hole at one end close to the support bolt 332, and the rotating hole is used to rotate with the support bolt 332. A torsion spring 335 is arranged between the rotating rod 333 and the second support frame 6312. The second support frame 6312 is formed with a second matching hole 6315, which is used to match with one end of the torsion spring 335. The rotating rod 333 is formed with a matching groove 7331, which is used to match with the other end of the torsion spring 335.

[0056] The first support frame 6311 and the second support frame 6312 can provide support for the support bolt 332, and the rotating rod 333 can rotate axially around the support bolt 332, so as to preferably adjust the height of the lowest point of the safety rope of the adjacent hoop. The limiting nut 334 can limit the movement range of the rotating rod 333, and preferably prevent the rotating rod 333 from separating from the support bolt 332. The torsion spring 335 can keep the rotating rod 333 in a tendency perpendicular to the ground. Since the safety rope between the adjacent two hoops naturally presents an arc shape in a suspended state due to gravity, the safety rope close to the hoop is in a vertical state by arranging the rotating rod 333 and matching with the safety rope, so as to provide an adjustable range for the height of the lowest point of the safety rope, and thus preferably facilitate the construction work of the construction personnel.

[0057] It can be understood that the torsional spring 335 is made of high-strength oil quenched and tempered silicon manganese spring steel, and the reliability of the torsional spring 335 can be improved by using the above material.

[0058] As shown in Figure 3 , 7 , the end of the rotating rod 333 away from the support bolt 332 is provided with a pulley bracket 7332, and the pulley bracket 7332 is provided with a fixed pulley 7333 for cooperation with the safety rope. The pulley bracket 7332 has a limiting frame 7334 at one end, which is used to limit the position of the safety rope.

[0059] By setting the fixed pulley 7333, the friction between the safety rope and the rotating rod 333 is reduced, the wear of the safety rope is reduced, and the safety is improved. By setting the limiting frame 7334, the safety rope is inserted from the limiting frame 7334, which can better realize the cooperation between the safety rope and the fixed pulley 7333, and prevent the safety rope from disengaging from the rotating rod 333.

[0060] As shown in Figure 3 , a plurality of second fastening holes 3316 are formed in the support plate 331, and a second fastening bolt 315 is arranged in the second fastening hole 3316. A third fastening hole 3116 is formed in the long plate 4112, and the second fastening bolt 315 cooperates with the second fastening hole 3316 and the third fastening hole 3116. A second fastening nut 316 is arranged on the second fastening bolt 315, and the second fastening nut 316 is threadedly connected with the second fastening bolt 315.

[0061] By setting the second fastening bolt 315 and the second fastening nut 316, the two support plates 331 and the two clamp members 311 can be cooperated, and the cooperation between the clamp assembly 210 and the suspender can be further strengthened.

[0062] As shown in Figure 3 , 8As shown in FIG. 11, the two hoop members 311 are provided with a plurality of reinforcing supports 817, which cooperate with the two hoop members 311 and the support plate 331; the support plate 331 comprises a bottom plate 9171 and side plates 9172 formed at both ends of the bottom plate 9171 in the width direction; a fourth fastening hole 9173 is formed at the bottom plate 9171, and a second fastening screw 818 is arranged at the fourth fastening hole 9173; a second fastening threaded hole 10117 is formed at the hoop member 311, and the second fastening screw 818 is threadedly connected with the second fastening threaded hole 10117; a fifth fastening hole 9174 is formed at the side plate 9172, and a third fastening screw 819 is arranged at the fifth fastening hole 9174; a third fastening threaded hole 11316 is formed at the hoop member 311, and the third fastening screw 819 is threadedly connected with the third fastening threaded hole 11316.

[0063] By arranging the reinforcing supports 817, the cooperation stability between the support plate 331 and the hoop member 311 can be improved, and the deformation of the support plate 331 can be prevented.

[0064] Embodiment 2

[0065] In combination Figures 1-11 As shown in FIG. 11, the two hoop members 311 are provided with a plurality of reinforcing supports 817, which cooperate with the two hoop members 311 and the support plate 331; the support plate 331 comprises a bottom plate 9171 and side plates 9172 formed at both ends of the bottom plate 9171 in the width direction; a fourth fastening hole 9173 is formed at the bottom plate 9171, and a second fastening screw 818 is arranged at the fourth fastening hole 9173; a second fastening threaded hole 10117 is formed at the hoop member 311, and the second fastening screw 818 is threadedly connected with the second fastening threaded hole 10117; a fifth fastening hole 9174 is formed at the side plate 9172, and a third fastening screw 819 is arranged at the fifth fastening hole 9174; a third fastening threaded hole 11316 is formed at the hoop member 311, and the third fastening screw 819 is threadedly connected with the third fastening threaded hole 11316.

[0066] Step S1: before the whole hoisting of the tied-arch bridge, the hoop assembly 210 and the tightening mechanism 230 are installed at each suspender;

[0067] Specifically, the two hoop members 311 are cooperated at a suitable height of the suspender, the installation hole 312 is cooperated with the outer wall of the suspender, the first fastening bolt 313 is used to pass through the first fastening hole 4113 and threadedly connect with the first fastening nut 314; the second fastening hole 3316 of the support plate 331 and the third fastening hole 3116 of the long plate 4112 are aligned, and the second fastening bolt 315 is used to pass through the second fastening hole 3316 and the third fastening hole 3116 and threadedly connect with the second fastening nut 316.

[0068] Further, the support bolt 332 passes through the first support hole 6313 and the second support hole 6314, and at the end away from the second support hole 6314, the torsion spring 335 and the rotating rod are sequentially penetrated, the one end of the torsion spring 335 is cooperated with the second cooperation hole 6315 of the second support frame 6312, and the other end of the torsion spring 335 is cooperated with the cooperation groove 7331 of the rotating rod; finally, the position of the rotating rod is limited by using the limiting nut 334 to cooperate with the support bolt 332.

[0069] Step S2: one safety rope is used to pass through the rope passing hole and the limiting frame 7334 of each hoop assembly 210;

[0070] Specifically, starting from the hoop assembly 210 at the most edge side of the boom, the safety rope is sequentially threaded through the rope threading hole and the limiting frame 7334 of each hoop assembly.

[0071] Step S3: After adjusting the length of the safety rope at the adjacent hoop assembly 210, the fixing mechanism 220 is matched with the mounting hole 312.

[0072] Specifically, the length of the safety rope between the adjacent hoop assemblies 210 is sequentially adjusted so that the height at the lowest point of the safety rope is at a suitable working height, facilitating cooperation with the fixed end of the safety belt and not affecting the movement of the construction personnel; then the two semicircular wedge blocks 3211 are matched with the safety rope near the hoop assembly 210 and inserted into the rope threading hole, and the first fastening screw 322 is threaded through the first matching hole 5211d and the first fastening screw hole 3115.

[0073] Step S4: The reinforcing support 817 is matched with the support plate 331 and the hoop member 311.

[0074] Specifically, the fourth fastening hole 9173 is aligned with the second fastening screw hole 10117, the second fastening screw 818 is threaded through the fourth fastening hole 9173 and the second fastening screw hole 10117, and the third fastening screw 819 is threaded through the fifth fastening hole 9174 and the third fastening screw hole 11316.

[0075] In specific use, the assembly of the hoop assembly 210 and the safety rope is set before hoisting, which preferably improves work efficiency, improves the safety of safety rope installation and use, and is easy to disassemble and assemble, facilitating construction work.

[0076] It is easy to understand that, based on one or more embodiments provided in the present application, other embodiments can be obtained by combining, splitting, recombining, etc. of the embodiments of the present application, and these embodiments do not exceed the protection scope of the present application.

[0077] The above describes the present application and its embodiments in a schematic manner, which is not limited, and the embodiments shown are only part of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby, without departing from the spirit of the present application, similar structural modes and embodiments can be designed without creativity, which should belong to the protection scope of the present application.

Claims

1. A safety line device for tied-arch bridge work, characterized by: The device comprises a device body (200), the device body (200) comprises a plurality of hoop assemblies (210) arranged on a boom and a safety rope connecting the hoop assemblies (210), the hoop assemblies (210) are provided with a fixing mechanism (220) and a tightening mechanism (230) matched with the safety rope, the fixing mechanism (220) is used for fixing the safety rope and the hoop assembly (210), and the tightening mechanism (230) is used for keeping the safety rope in a tightening state; The hoop assembly (210) comprises two hoop members (311) matched with each other, one end of the hoop member (311) in the length direction forms a short plate (4111), and the other end forms a long plate (4112); The fixing mechanism (220) comprises a rope penetrating hole (4114) formed at the long plate (4112) and penetrating through the long plate (4112), the rope penetrating hole (4114) is used for penetrating the safety rope, and the rope penetrating hole (4114) is provided with a fixing wedge (321), the fixing wedge (321) comprises two half-circular wedge blocks (3211) matched with each other, and the two half-circular wedge blocks (3211) are used for matching with the safety rope; the half-circular wedge block (3211) comprises a wedge block body (5211a), one end of the wedge block body (5211a) forms a matching disc (5211b), a half-circular hole (5211c) is formed at the center of the matching disc (5211b), and the radius of the half-circular hole (5211c) gradually decreases in the axial direction; The tightening mechanism (230) comprises a support plate (331) arranged at the long plate (4112), the support plate (331) is spaced apart in the length direction and forms a first support frame (6311) and a second support frame (6312), a first support hole (6313) is formed at the first support frame (6311), and a second support hole (6314) is formed at the second support frame (6312); a support bolt (332) is arranged in the first support hole (6313) and the second support hole (6314), the support bolt (332) is provided with a rotating rod (333) and a limiting nut (334) away from the second support frame (6312), the limiting nut (334) is threadedly matched with the support bolt (332), and the limiting nut (334) is used for limiting the movement range of the rotating rod (333); one end of the rotating rod (333) close to the support bolt (332) forms a rotating hole, the rotating hole is used for rotatingly matching with the support bolt (332); a torsion spring (335) is arranged between the rotating rod (333) and the second support frame (6312), the second support frame (6312) forms a second matching hole (6315) used for matching with one end of the torsion spring (335), and the rotating rod (333) forms a matching groove (7331) used for matching with the other end of the torsion spring (335); One end of the rotating rod (333) away from the support bolt (332) is provided with a pulley support (7332), the pulley support (7332) is provided with a fixed pulley (7333), the fixed pulley (7333) is used for matching with the safety rope, and one end of the pulley support (7332) forms a limiting frame (7334) used for limiting the position of the safety rope.

2. A safety line arrangement for tied-arch bridge work according to claim 1, characterised in that: The two hoop members (311) are matched to form a mounting hole (312) for matching with a suspender.

3. A safety line arrangement for tied-arch bridge work according to claim 2, characterised in that: A plurality of first fastening holes (4113) are formed at the short plate (4111) and a first fastening bolt (313) is arranged in the first fastening hole (4113), the first fastening bolt (313) is provided with a first fastening nut (314) and the first fastening bolt (313) is threadedly matched with the first fastening nut (314).

4. A safety line arrangement for tied-arch bridge work according to claim 3, characterised in that: A plurality of first matching holes (5211d) are formed at the matching disc (5211b) and a first fastening screw (322) is arranged at the first matching hole (5211d), a first fastening screw thread hole (3115) is correspondingly formed at the long plate (4112) and the first fastening screw (322) is threadedly matched with the first fastening screw thread hole (3115).

5. A safety line arrangement for tied-arch bridge work according to claim 4, characterised in that: A plurality of second fastening holes (3316) are formed at the support plate (331) and a second fastening bolt (315) is arranged in the second fastening hole (3316), a third fastening hole (3116) is correspondingly formed at the long plate (4112), the second fastening bolt (315) is matched with the second fastening hole (3316) and the third fastening hole (3116), the second fastening bolt (315) is provided with a second fastening nut (316) and the second fastening nut (316) is threadedly matched with the second fastening bolt (315).

6. A safety line arrangement for tied-arch bridge work according to claim 5, characterised in that: The two hoop members (311) are provided with a plurality of reinforcing supports (817) at the bottom and the reinforcing supports (817) are matched with the two hoop members (311) and the support plate (331); the support plate (331) comprises a bottom plate (9171) and side plates (9172) formed at both ends of the bottom plate (9171) in the width direction; a fourth fastening hole (9173) is formed at the bottom plate (9171) and a second fastening screw (818) is arranged at the fourth fastening hole (9173), a second fastening screw thread hole (10117) is formed at the hoop member (311) and the second fastening screw (818) is threadedly matched with the second fastening screw thread hole (10117); a fifth fastening hole (9174) is formed at the side plate (9172) and a third fastening screw (819) is arranged at the fifth fastening hole (9174), a third fastening screw thread hole (11316) is formed at the hoop member (311) and the third fastening screw (819) is threadedly matched with the third fastening screw thread hole (11316).

7. A method for securing a worker on a tied-arch bridge using the safety line device of any one of claims 1 to 6, wherein the method comprises the steps of: a) attaching the safety line device to the worker; b) attaching the safety line device to the tied-arch bridge; and c) securing the worker to the tied-arch bridge. The method comprises the following steps: Step S1: before the overall hoisting of the tied arch bridge, the hoop assembly (210) and the tightening mechanism (230) are installed at each suspender; Step S2: a safety rope is passed through the rope passing hole (4114) and the limiting frame (7334) at each hoop assembly (210); Step S3: after adjusting the length of the safety rope at the adjacent hoop assembly (210), the fixing mechanism (220) is matched with the rope passing hole (4114); Step S4: the reinforcing support (817) is matched with the support plate (331) and the hoop member (311).

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