CN117569202A - Suspension bridge main cable erection traction system and method - Google Patents

Abstract

The invention discloses a suspension bridge main cable erection traction system, which comprises a supporting mechanism, a plurality of portal frames, a traction mechanism, a winding device, a distance detection device and a control device, wherein the supporting mechanism comprises a first main tower, a second main tower and a channel arranged between the first main tower and the second main tower; the plurality of portal frames are arranged on the channel at intervals along the length direction of the channel; the traction mechanism comprises a pilot cable which is stretched between the first main tower and the second main tower and a puller which is fixedly arranged on the pilot cable; the winding device is used for winding or releasing the guide rope; the distance detection device is used for detecting the distance between the puller and the portal frame; the control device is electrically connected with the winding device and the distance detection device. The suspension bridge main cable erection traction system provided by the invention can realize automatic control of the speed of the main cable anchor head passing through the portal frame in the suspension bridge main cable erection process, so that the traction process is safer and more efficient.

Description

Suspension bridge main cable erection traction system and method

Technical Field

The invention relates to the technical field of suspension bridge main cable erection, in particular to a suspension bridge main cable strand traction system and method.

Background

In recent years, bridge construction is carried out from inland bridges to sea-crossing and mountain-crossing bridges in the sea, mountain areas and the like, and suspension bridges and cable-stayed bridges are widely adopted in bridge construction at present. And suspension bridges have become one of their major forms in terms of their excellent ride-through capability. When in construction, the cable strand supporting towers are arranged on two sides of the suspension bridge, catwalk surface cables (formed by a plurality of steel cables arranged side by side) are arranged between the cable strand supporting towers, the catwalk surface cables form a cable strand main cable temporary construction operation channel, and all cable strands forming the cable strand main cable finish construction on the catwalk surface cables. For convenient construction, a portal frame is arranged on the catwalk surface rope at intervals. During construction, the ends of each cable strand firstly pass through the cable strand supporting tower and the portal frame and then are towed to the cable strand supporting tower on the other shore, and then the two ends of each cable strand are fixed on the cable strand anchor seat. The main cable construction mostly adopts a construction method of erecting prefabricated parallel steel wire strands one by one, a reciprocating traction system formed by a main traction winch and an auxiliary traction winch provides traction force, and each strand passes through a strand support tower and a portal frame to reach a preset position after a puller is connected with a strand anchor head.

At present, the cable strand of the main cable mainly relies on a traction system to finish erection, a traditional traction system mainly adjusts two windlass which are responsible for winding and unwinding traction ropes in the construction process by manpower, a plurality of workers are respectively positioned at the cable strand installation position, the two banks and the like of the puller, and the workers observe the real-time condition of cable strand traction on site and comprise: position, velocity, etc. Then the output speed of the two-bank windlass is manually adjusted through the wireless interphone, so that the main cable strand can be erected at a stable speed.

However, the mode is to finish communication and adjustment by manpower to finish main cable erection, so that the construction and communication cost is high, the efficiency is low, and the degree of automation is low; in addition, the fault tolerance is low, and errors cannot be handled in time. Because the problem of high time delay of manual communication, the speed of the real-time main cable strand cannot be timely obtained and effectively controlled and adjusted, especially when the dragger drags the stay cable strand anchor head to pass through the portal frame, if the speed of the stay cable strand anchor head has larger deviation and is not timely fed back, the system cannot timely take emergency measures, and larger loss is easily caused.

Disclosure of Invention

The invention mainly aims to provide a suspension bridge main cable erection traction system and method, which aim to solve the problem that the speed of a main cable anchor head of a suspension bridge main cable cannot be automatically controlled when the main cable anchor head passes through a portal frame in the suspension bridge main cable erection process.

In order to achieve the above purpose, the invention adopts the following technical scheme:

a suspension bridge main cable erection traction system comprising:

the support mechanism comprises a first main tower, a second main tower and a channel arranged between the first main tower and the second main tower;

the door frames are arranged on the channel at intervals along the length direction of the channel, each door frame is provided with a limiting structure, and a limiting penetrating channel is formed in each limiting structure;

the traction mechanism comprises a pilot rope which is stretched between the first main tower and the second main tower, the pilot rope is arranged in a plurality of limiting penetrating channels in a penetrating mode, a dragging device is fixedly arranged on the pilot rope, the lower end of the dragging device is provided with a traction part for dragging a main rope strand to move so as to drag the main rope strand from the first main tower to the second main tower or from the second main tower to the first main tower;

the winding device is used for winding or releasing the guide rope so that the guide rope moves along the length direction of the guide rope;

the distance detection device is used for detecting the distance between the puller and the portal frame;

the control device is electrically connected with the winding device and the distance detection device;

and determining a moving speed adjusting strategy according to the interval value, and controlling the action of a winding motor of the winding device according to the moving speed adjusting strategy so as to adjust the moving speed of the puller.

Further, the winding device comprises a first winding machine and a second winding machine, the first winding machine and the second winding machine are respectively arranged at two ends of the guide rope, when the first winding machine is used for winding and drawing the guide rope, the second winding machine is used for loosening the guide rope, when the second winding machine is used for winding and drawing the guide rope, the first winding machine is used for loosening the guide rope, and the first winding machine and the second winding machine are matched for winding and unwinding the guide rope to regulate and control the speed of the dragging device.

Still further, the first hoist and the second hoist are both disposed adjacent to the first main tower or both are disposed adjacent to the second main tower, and a fixed pulley is disposed on the second main tower or on the first main tower, and the pilot rope bypasses the fixed pulley, and the fixed pulley is used for steering the pilot rope.

Further, the distance detection device comprises an ultra-wideband ranging module, wherein the ultra-wideband ranging module comprises an ultra-wideband base station and a plurality of ultra-wideband slave stations;

the ultra-wideband base station is arranged on the puller, and the ultra-wideband slave stations are respectively and correspondingly arranged on the door frames.

Further, the puller further includes: the loop part is fixed on the guide rope and provided with a first end part and a second end part which are oppositely arranged; the method comprises the steps of,

and the connecting part is used for rigidly connecting the traction part and the loop part.

Still further, the connection part includes: one end of the first connecting rod is fixedly connected with the first end part, and the other end of the first connecting rod is connected with the traction part; the method comprises the steps of,

and one end of the second connecting rod is fixedly connected with the second end part, and the other end of the second connecting rod is connected with the traction part.

Still further, the traction portion includes: a fixing part connected with the connecting part; the method comprises the steps of,

the minimum inner diameter of the clamping part is smaller than the outer diameter of the main cable strand cable body, and the maximum inner diameter of the clamping part is larger than or equal to the outer diameter of the main cable strand cable body.

The invention also provides a traction control method for the main cable erection of the suspension bridge, which comprises the following steps:

acquiring a distance value between the traction part and the plurality of portals;

and determining a moving speed adjusting strategy according to the interval value, and controlling the action of a winding motor of the winding device according to the moving speed adjusting strategy so as to adjust the moving speed of the puller.

Further, determining a movement speed adjustment strategy according to the distance value, and controlling the winding motor of the winding device to act according to the movement speed adjustment strategy so as to adjust the movement speed of the puller, wherein the method comprises the following steps:

when the distance value is smaller than or equal to a preset limit value, controlling a winding motor of the winding device to reduce power so as to slow down the moving speed of the puller;

when the distance value is larger than a preset limit value, the winding motor of the winding device is controlled to increase power so as to increase the moving speed of the puller.

The system and the method for erecting and pulling the main cable of the suspension bridge can automatically control the speed of the puller when the main cable strand passes through the portal frame, measure the distance between the puller and the portal frame through the distance detection device and transmit the distance to the control device, and when the puller approaches the portal frame, the control device controls the winch to decelerate so that the puller pulls the main cable strand to decelerate through the portal frame; after the puller passes through the portal frame, the control device controls the winch to accelerate so that the puller pulls the main cable strand to restore to the normal running speed. Therefore, the suspension bridge main cable erection traction system provided by the invention can realize automatic control of the speed of the main cable anchor head passing through the portal frame in the suspension bridge main cable erection process, so that the traction process is safer and more efficient.

Drawings

In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a main cable erection traction system of a suspension bridge according to the present invention.

Fig. 2 is a schematic block diagram of the suspension bridge main cable erection traction system of fig. 1.

Fig. 3 is a schematic plan view of the relative positions of the traction mechanism and the plurality of gantries in fig. 1.

Fig. 4 is a schematic plan view of the traction mechanism of fig. 1.

Fig. 5 is a schematic diagram of a server structure of a hardware running environment according to the present invention.

Fig. 6 is a schematic diagram of a judging flow of the suspension bridge main cable erection traction system provided by the invention.

Fig. 7 is a schematic diagram of a specific judgment flow of step S20 in fig. 6.

The marks in the figure: 11. a first main column; 12. a second main column; 13. a channel; 2. a door frame; 21. a limit structure; 31. a guide rope; 32. a puller; 332. a collar portion; 3212. a clamping part; 3211. a fixing part; 3231. a first connecting rod; 3232. a second connecting rod; 33. a main cable strand; 4. a winding device; 41. a first hoist; 42. a second hoist; 43. a fixed pulley; 5. a distance detecting device; 51. an ultra wideband base station; 52. an ultra wideband slave station; 6. a control device; 61. and a data transmission module.

Detailed Description

Referring to fig. 1 to 2, the suspension bridge main cable erection traction system provided by the present invention includes a support mechanism, a plurality of portal frames 2, a traction mechanism, a winding device 4, a distance detection device 5 and a control device 6, wherein the support mechanism includes a first main tower 11, a second main tower 12 and a channel 13 between the first main tower 11 and the second main tower 12; the plurality of the door frames 2 are arranged on the channel 13 at intervals along the length direction of the channel 13, a limiting structure 21 is arranged on each door frame 2, and a limiting penetrating channel 13 is formed in the limiting structure 21; the traction mechanism comprises a pilot cable 31 which is stretched between the first main tower 11 and the second main tower 12, the pilot cable 31 is penetrated in a plurality of limiting penetrating channels 13, a puller 32 is fixedly arranged on the pilot cable 31, the lower end of the puller 32 is provided with a traction part for pulling a main cable strand 33 to move so as to drag the main cable strand 33 from the first main tower 11 to the second main tower 12 or from the second main tower 12 to the first main tower 11; the winding device 4 is used for winding or releasing the guide rope 31 so that the guide rope 31 moves along the length direction; the distance detection device 5 is used for detecting the distance between the puller 32 and the portal 2; the control device 6 is electrically connected with the winding device 4 and the distance detection device 5.

In this embodiment, the guide cable 31 is stretched between the first main tower 11 and the second main tower 12, a puller 32 is fixedly mounted on the guide cable 31, and a traction portion is disposed at the lower end of the puller 32 for pulling the main cable strand 33 to move. When the main cable is pulled, the winding device 4 winds or releases the guide cable 31, so that the guide cable 31 can move along the length direction thereof, the puller 32 is driven to move along the length direction of the guide cable 31, and a traction part is arranged at the lower end of the puller 32, so that the main cable strand 33 can be pulled to move along the length direction of the guide cable 31. The distance between the puller 32 and the gantry 2 is detected by the distance detecting device 5 and transmitted to the control device 6 when the puller 32 pulls the main cable strand 33 through the gantry 2, the control device 6 controls the winch to decelerate so that the puller 32 pulls the main cable strand 33 through the gantry 2 when the puller 32 approaches the gantry 2, and after the puller 32 passes through the gantry 2, the control device 6 controls the winch to accelerate so that the puller 32 pulls the main cable strand 33 to return to the normal running speed. The control device 6 may include a real-time monitoring module and a data transmission module 61, where the real-time monitoring module includes a traction mechanism real-time monitoring device disposed on the traction mechanism and an efficacy real-time monitoring device disposed on the winding device 4, where the traction mechanism real-time monitoring module can play a role in monitoring a traction state of the traction mechanism and locating a specific position of the traction mechanism, the efficacy real-time monitoring device on the winding device 4 plays a role in monitoring a working state of the winding device 4 in real time, and after receiving the running state and locating information of the traction mechanism, the control device 6 can analyze and process collected related data according to the running state of the current traction mechanism, and send corresponding instructions to the winding device 4 via the data transmission module 61 after processing the related information, so as to control a running speed of the traction mechanism. The real-time monitoring device of the traction mechanism comprises 2 cameras and a real-time positioning device, wherein the two cameras can respectively acquire pictures of the traction state of the traction mechanism and pictures of the running direction, wherein the camera shooting the pictures of the traction state of the traction mechanism can acquire the traction state of the main cable strand 33, and when the main cable strand 33 is in an abnormal state, such as abnormal states of strand wire scattering, torsion and the like, a worker can timely control the traction mechanism to stop running according to the related abnormal state; meanwhile, the specific position of the traction mechanism can be positioned in real time by installing the real-time positioning device, and then the real-time specific positions of the plurality of the door frames 2 are calculated according to the specific positions of the traction mechanism, so that the movement of the traction mechanism can be better controlled, and the traction mechanism and the plurality of the door frames 2 cannot collide. Therefore, the suspension bridge main cable erection traction system provided by the invention can realize automatic control of the speed of the main cable anchor head passing through the portal frame 2 in the suspension bridge main cable erection process, so that the traction process is safer and more efficient.

The winding device 4 includes a first winding machine 41 and a second winding machine 42, the first winding machine 41 and the second winding machine 42 are respectively disposed at two ends of the pilot rope 31, when the first winding machine 41 winds and pulls the pilot rope 31, the second winding machine 42 loosens the pilot rope 31, when the second winding machine 42 winds and pulls the pilot rope 31, the first winding machine 41 loosens the pilot rope 31, and the first winding machine 41 and the second winding machine 42 cooperate to wind and pull the pilot rope 31 so as to regulate and control the speed of the puller 32. In this embodiment, the first hoist 41 and the second hoist 42 are used in cooperation, when the first hoist 41 receives and pulls the pilot cable 31, the second hoist 42 loosens the pilot cable 31, and when the second hoist 42 receives and pulls the pilot cable 31, the first hoist 41 loosens the pilot cable 31, so that the pilot cable 31 moves along the length direction thereof, and the puller 32 is driven to pull the main cable strand 33 to move along the length direction of the pilot cable 31. In other embodiments, the winding device 4 may further use one winding machine to pull the guide rope 31 to move along the length direction, but in contrast, the present embodiment uses two winding machines to wind and unwind at one time, so that the pulling process is safer and more stable.

Further, the first hoist 41 and the second hoist 42 are both disposed adjacent to the first main tower 11 or adjacent to the second main tower 12, and a fixed pulley 43 is disposed on the second main tower 12 or on the first main tower 11, the pilot rope 31 is disposed around the fixed pulley 43, and the fixed pulley 43 is used for steering the pilot rope 31. The traction rope is led out from the first winch 41, reaches the opposite second main tower 12 through the guide wheel set on the channel 13 at the same side as the first winch 41, is turned through the fixed pulley 43 on the second main tower 12, and returns to the second winch 42 from the guide wheel set on the channel 13 at the other side. In other embodiments, the first winch 41 and the second winch 42 may be disposed adjacent to the first main tower 11 and the second main tower 12, but the first winch 41 and the second winch 42 may have a dead stroke when the traction rope goes back and forth, so that the construction efficiency is low, the first winch 41 and the second winch 42 are easy to operate out of synchronization to generate a pull-up phenomenon, the quality of the main cable is affected, two sets of traction systems are required to be disposed for two main cables, and the investment of materials, equipment and personnel is large. In this embodiment, the first winch 41 and the second winch 42 are both disposed adjacent to the first main tower 11 or are both disposed adjacent to the second main tower 12, so that the required materials, equipment and personnel investment are small, the construction cost is low, and the construction efficiency is high.

Referring to fig. 3, the distance detecting device 5 includes an ultra-wideband ranging module, where the ultra-wideband ranging module includes an ultra-wideband base station 51 and a plurality of ultra-wideband slave stations 52, the ultra-wideband base station 51 is disposed on the puller 32, and the plurality of ultra-wideband slave stations 52 are respectively disposed on the plurality of gantry frames 2 correspondingly. In this embodiment, the ultra wideband ranging module is set to be a fusion positioning vehicle-mounted terminal, and a UWB module is carried on the ultra wideband ranging module, so that wireless accurate ranging and anti-collision functions can be realized. When the integrated positioning vehicle-mounted terminal is in a working state of a base station mode, a slave station of the UWB module, namely, the UWB slave stations arranged on the plurality of portal frames 2 actively initiate a ranging application, at the moment, the traction mechanism is provided with a base station of the UWB module, the UWB base station calculates the distance between the UWB slave station and the UWB base station after receiving a ranging request sent by the UWB slave station, and whether the traction mechanism needs to accelerate or decelerate is judged through the comparison of the distance between the distance and the preset distance. The distance detecting device 5 may be further configured as a distance sensor, such as a laser distance measuring sensor or an ultrasonic distance measuring sensor, where the laser distance measuring sensor has a relatively high requirement on the environment, and is not suitable for industrial operation, and the ultrasonic distance measuring sensor has a certain diffusion angle, and only can measure the distance, and cannot measure the azimuth, so that the distance detecting device can only be used in a low-speed state, and therefore in this embodiment, an ultra wideband distance measuring module, that is, a UWB module, is used to complete the measurement of the distance between the traction mechanism and the gantry 2.

Referring to fig. 4, the puller 32 further includes a loop portion 332 and a connecting portion, wherein the loop portion 332 is fixedly sleeved on the guide rope 31 and has a first end portion and a second end portion which are oppositely disposed; the connecting portion rigidly connects the pulling portion and the collar portion 332. One end of the loop portion 332 is formed by connecting two wedge-shaped connectors, and is fixed on the traction rope, so that the puller 32 moves along with the movement of the traction rope, and the balance weight is arranged at the other end of the loop portion, so that the puller 32 keeps a correct position, and the phenomena of twisting and rope falling of the traction rope in the traction process of the rope strand are reduced.

The connecting part comprises a first connecting rod 3231 and a second connecting rod 3232, one end of the first connecting rod 3231 is fixedly connected with the first end part, and the other end of the first connecting rod 3231 is connected with the traction part; one end of the second connecting rod 3232 is fixedly connected with the second end, and the other end is connected with the traction part. The connecting portion and the collar portion 332 form a triangular stabilizing structure. In other embodiments, the connection portion may be provided in other ways, for example, the loop portion 332 is directly connected to the traction portion by a connection rod, but the connection rod is not consistent with the movement direction, so that the connection rod is easily damaged during the process of pulling the main cable. Therefore, the two connecting rods and the loop portion 332 are adopted together to form a triangular stable structure, so that the cable is not easy to damage, and the main cable strand 33 can be stably pulled to move.

The traction portion includes a fixing portion 3211 and a clamping portion 3212, the fixing portion 3211 is connected with the connecting portion, a minimum inner diameter of the clamping portion 3212 is smaller than an outer diameter of the main cable strand 33 and a maximum inner diameter of the clamping portion is larger than or equal to the outer diameter of the main cable strand 33, so that the main cable strand 33 is clamped more conveniently and firmly. When the main cable strand 33 is clamped, the inner diameter of the clamping part 3212 is adjusted to be larger than the outer diameter of the main cable strand 33 so as to clamp the anchor head of the main cable strand 33, and after the anchor head of the main cable strand 33 is placed into the clamping part 3212, the inner diameter of the clamping part 3212 is adjusted to be smaller than the outer diameter of the main cable strand 33 so as to enable clamping to be firmer.

The invention also provides a suspension bridge main cable erection traction control method, which comprises all the technical characteristics described in the embodiment, so that all the technical effects described in the embodiment are achieved, and the description is omitted herein.

Referring to fig. 5, fig. 5 is a schematic structural view of the control device 6 of the present invention.

As shown in fig. 5, the control device 6 may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.

It will be appreciated by those skilled in the art that the configuration shown in fig. 5 is not limiting of the control device 6 and may include more or fewer components than shown, or may be combined with certain components, or may be arranged in a different arrangement of components.

As shown in fig. 5, an operating system, a network communication module, a user interface module, and a winding device 4 control program may be included in a memory 1005 as a computer storage medium.

Referring to fig. 6 in combination, the network interface 1004 is mainly used for connecting to a terminal device and performing data communication with the terminal device; the user interface 1003 is mainly used for receiving an input instruction of an administrator; the server calls the winding device 4 control program stored in the memory 1005 through the processor 1001, and performs the following operations:

step S10, obtaining interval values between the traction part and the plurality of portal frames 2;

during the movement of the traction section from the first main tower 11 to the second main tower 12, a plurality of the masts 2 are passed, and thus UWB slave stations are provided on each of the masts 2, so that the relative distance between the traction section and each of the masts 2 can be acquired.

Step S20, obtaining a minimum distance value according to the distance value, determining a movement speed adjustment strategy, and controlling the winding motor of the winding device 4 to act according to the movement speed adjustment strategy so as to adjust the movement speed of the puller 32. Wherein the minimum distance value is the minimum distance value between the puller 32 and the plurality of gantries 2.

Referring to fig. 7, step S20 includes:

step S201, when the most-spaced value is smaller than or equal to a preset limit value, controlling a winding motor of the winding device 4 to reduce the rotating speed so as to slow down the moving speed of the traction device;

and S202, when the distance value is larger than a preset limit value, controlling a winding motor of the winding device 4 to increase the rotating speed so as to increase the moving speed of the traction mechanism.

In this embodiment, the distance between the traction portion and the gantry 2 can be directly obtained through the UWB module, when the distance is monitored to be too close and smaller than or equal to the distance value, the distance is transmitted to the control device 6 through wired data, the control device 6 can collect the distance, and sends corresponding command control to reduce the motor rotation speed of the winding device 4, so that the rope releasing speed of the winding device 4 is reduced, the movement speed of the traction mechanism is reduced, the winding device can safely pass through and does not collide with the gantry 2, when the distance between the traction portion and the gantry 2 is larger than the preset distance, the control device 6 can collect the distance through wired data and send corresponding commands to control the motor rotation speed of the winding device 4 to be increased, so that the rope releasing speed of the winding device 4 is increased, the movement speed of the traction mechanism is increased, the winding device can maintain a high-efficiency running state, and therefore the automatic control of the speed of the main anchor cable 2 can be realized to safely pass through the gantry after the speed is more than the preset distance.

The foregoing is merely a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification and substitution based on the technical scheme and the inventive concept provided by the present invention should be covered in the scope of the present invention.

Claims (9)

1. A suspension bridge main cable erection traction system, comprising:

the support mechanism comprises a first main tower, a second main tower and a channel arranged between the first main tower and the second main tower;

the door frames are arranged on the channel at intervals along the length direction of the channel, each door frame is provided with a limiting structure, and a limiting penetrating channel is formed in each limiting structure;

the traction mechanism comprises a pilot rope which is stretched between the first main tower and the second main tower, the pilot rope is arranged in a plurality of limiting penetrating channels in a penetrating mode, a dragging device is fixedly arranged on the pilot rope, the lower end of the dragging device is provided with a traction part for dragging a main rope strand to move so as to drag the main rope strand from the first main tower to the second main tower or from the second main tower to the first main tower;

the winding device is used for winding or releasing the guide rope so that the guide rope moves along the length direction of the guide rope;

the distance detection device is used for detecting the distance between the puller and the portal frame;

the control device is electrically connected with the winding device and the distance detection device;

and determining a moving speed adjusting strategy according to the interval value, and controlling the action of a winding motor of the winding device according to the moving speed adjusting strategy so as to adjust the moving speed of the puller.

2. The suspension bridge main cable erection traction system according to claim 1, wherein the winding device comprises a first winding machine and a second winding machine, the first winding machine and the second winding machine are respectively arranged at two ends of the guide cable, when the first winding machine is used for winding and pulling the guide cable, the second winding machine is used for loosening the guide cable, when the second winding machine is used for winding and pulling the guide cable, the first winding machine is used for loosening the guide cable, and the first winding machine and the second winding machine are used for winding and unwinding the guide cable in a matched mode so as to regulate and control the speed of the puller.

3. The suspension bridge main cable erection traction system according to claim 2, wherein the first and second winches are each disposed adjacent to the first main tower or each adjacent to the second main tower, and a fixed sheave is provided on the second main tower or on the first main tower, around which fixed sheave the pilot cable is disposed, the fixed sheave being used to steer the pilot cable.

4. The suspension bridge main cable erection traction system of claim 1, wherein the distance detection device comprises an ultra-wideband ranging module comprising an ultra-wideband base station and a plurality of ultra-wideband slave stations;

the ultra-wideband base station is arranged on the puller, and the ultra-wideband slave stations are respectively and correspondingly arranged on the door frames.

5. The suspension bridge main cable erection traction system of claim 1, wherein the puller further comprises:

the loop part is fixed on the guide rope and provided with a first end part and a second end part which are oppositely arranged; the method comprises the steps of,

and the connecting part is used for rigidly connecting the traction part and the loop part.

6. The suspension bridge main cable erection traction system of claim 5, wherein the connection portion comprises:

one end of the first connecting rod is fixedly connected with the first end part, and the other end of the first connecting rod is connected with the traction part; the method comprises the steps of,

and one end of the second connecting rod is fixedly connected with the second end part, and the other end of the second connecting rod is connected with the traction part.

7. The suspension bridge main cable erection traction system of claim 5, wherein the traction portion comprises:

a fixing part connected with the connecting part; the method comprises the steps of,

the minimum inner diameter of the clamping part is smaller than the outer diameter of the main cable strand cable body, and the maximum inner diameter of the clamping part is larger than or equal to the outer diameter of the main cable strand cable body.

8. A suspension bridge main cable erection traction control method based on the suspension bridge main cable erection traction control system according to any one of claims 1 to 7, characterized in that the suspension bridge main cable erection traction control method comprises the steps of:

acquiring a distance value between the traction part and the plurality of portals;

and determining a moving speed adjusting strategy according to the interval value, and controlling the action of a winding motor of the winding device according to the moving speed adjusting strategy so as to adjust the moving speed of the puller.

9. The method according to claim 8, wherein determining a movement speed adjustment strategy according to the distance value, and controlling a winding motor of the winding device to act according to the movement speed adjustment strategy, so as to adjust the movement speed of the puller, comprises:

when the distance value is smaller than or equal to a preset limit value, controlling a winding motor of the winding device to reduce power so as to slow down the moving speed of the puller;

when the distance value is larger than a preset limit value, the winding motor of the winding device is controlled to increase power so as to increase the moving speed of the puller.