Cable penetrating device and cable penetrating method

Abstract

The invention relates to the technical field of building construction, and discloses a cable penetrating device and a cable penetrating method.The cable penetrating device is applied to steel strand cable penetrating construction of a large-span prefabricated steel beam, and a cableway is arranged in the prefabricated steel beam; the cable penetrating device comprises a material disc, a driving piece, a traction piece and a connecting clamp. By arranging the driving piece, the traction piece and the connecting clamp, automatic traction and stable penetrating of the steel strand in the cableway in the prefabricated steel beam are achieved. The traction piece is driven by the driving piece to achieve one-way circulating motion, unstable factors caused by back-and-forth repeated traction are avoided, the automation degree of cable penetrating operation is improved, and the cable penetrating efficiency is remarkably improved; the steel strand is reliably connected with the traction piece through the connecting clamp and is driven by the traction piece to move at a constant speed along the cableway, the clamping stagnation and winding phenomena caused by uneven stress or improper guiding are avoided, and the stability and reliability of the cable penetrating process are improved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and specifically to a cable-threading device and method. Background Technology

[0002] In the field of building construction, especially in the construction of ultra-large span spatial structures, prestressed technology is widely used due to its significant structural optimization and load-bearing capacity enhancement effects. Among them, post-tensioning, as a typical prestressing application method, has become an important means of constructing large-span prestressed structures due to its advantages such as high precision in stress control and strong construction flexibility. Especially in arched steel structure systems, the rational layout and efficient tensioning of prestressed steel strands are key to ensuring the overall stability and long-term service performance of the structure.

[0003] However, existing technologies for threading and anchoring multiple steel strands within the same cableway still face numerous unresolved technical challenges. The commonly used strand-by-strand threading method is prone to causing strand jamming and entanglement within the sheath when dealing with a large number of strands in a bundle with limited space, severely impacting threading efficiency and construction continuity. Furthermore, this type of operation is highly dependent on manual labor, resulting in high labor intensity, long work cycles, and uneven prestress distribution, thus affecting the design matching of the structural stress field and actual load-bearing capacity. Summary of the Invention

[0004] In view of this, the present invention provides a cable threading device and a cable threading method to solve the problem in the prior art that the steel strand is easily stuck and tangled in the cableway during cable threading, resulting in low cable threading efficiency and long operation cycle.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] In a first aspect, the present invention provides a cable-threading device for cable-threading construction of steel strands in a large-span precast steel beam, wherein a cableway is provided within the precast steel beam; comprising: a material tray, a driving component, a traction component, and a connecting clamp; the material tray is used to collect and store the steel strands; the driving component is disposed on the precast steel beam; the beginning and end of the traction component are connected to the driving component, the traction component is threaded through the cableway, and the driving component drives the traction component to move in a unidirectional cycle; the connecting clamp is adapted to clamp and connect the steel strands to the traction component, and the steel strands move with the traction component so that the steel strands are threaded through the cableway.

[0007] It has the following advantages:

[0008] This invention provides a cable-threading device that, through the configuration of a driving component, a traction component, and connecting clamps, achieves automatic traction and stable threading of steel strands within a cableway in a precast steel beam. The driving component enables unidirectional cyclic movement of the traction component, avoiding the instability caused by repeated back-and-forth traction, thus improving the automation level of the cable-threading operation and significantly increasing efficiency. The steel strands are reliably connected to the traction component via the connecting clamps, moving at a uniform speed along the cableway under the traction component's influence, avoiding jamming or entanglement caused by uneven force or improper guidance, thereby enhancing the stability and reliability of the cable-threading process. This device has a compact structure and strong adaptability, suitable for the construction requirements of cable-threading in precast steel beams with ultra-long spans, improving the overall operational efficiency in the construction of large-span structures. By replacing traditional manual operations with mechanized and automated methods, it not only shortens the cable-threading period but also significantly reduces on-site construction reliance on skilled workers, saving human resource input.

[0009] According to a first aspect of the present invention, the cable threading device further includes a tensioning structure disposed on the precast steel beam, the traction member being threaded through the tensioning structure, and the tensioning structure causing the traction member to be in a tensioned state.

[0010] According to a first aspect of the present invention, the cable-threading device further includes a plurality of steering members, the traction member being wound around the steering members, and the steering members being adapted to adjust the direction of movement of the traction member.

[0011] According to a first aspect of the present invention, the steering component includes a first steering wheel and a second steering wheel, the first steering wheel and the second steering wheel being disposed on both sides of the precast steel beam, and the first steering wheel, the second steering wheel and the cableway being located on the same horizontal line.

[0012] According to a first aspect of the present invention, both the first steering wheel and the second steering wheel can slide vertically within the width of the cableway.

[0013] According to a first aspect of the present invention, both the first steering wheel and the second steering wheel may be provided in multiples.

[0014] According to a first aspect of the present invention, the driving component is a winch.

[0015] According to a first aspect of the present invention, the connecting clamp includes: a housing, an inner connector, and an outer connector; the housing has a mounting cavity; the inner connector can be placed in the mounting cavity and has a mounting groove; one end of the outer connector is connected to the housing; a traction member can pass through the housing to be engaged with the mounting groove, and the other end of the outer connector is adapted to be connected to a steel strand; or the steel strand can pass through the housing to be engaged with the mounting groove, and the other end of the outer connector is adapted to be connected to the traction member.

[0016] According to a first aspect of the present invention, the connecting clamp includes: a first hoop and a second hoop arranged in a symmetrical structure, the first hoop and the second hoop cooperating with each other to form a first slot and a second slot in the middle, one end of the steel strand being placed in the first slot and one end of the traction member being placed in the second slot; or one end of the traction member being placed in the first slot and one end of the steel strand being placed in the second slot; and fasteners passing through the first hoop and the second hoop (15) to be adapted to fix the first hoop and the second hoop together to clamp and fix the traction member and the steel strand.

[0017] Secondly, the present invention also provides a cable threading method, applicable to the cable threading construction of steel strands in large-span precast steel beams, comprising the following steps:

[0018] A section of steel strand is threaded from the first side of the cableway to the second side using a jacking device, and one end of the traction member is connected to one end of the steel strand located outside the first side of the cableway using a connecting clamp.

[0019] The steel strands inside the cableway are pulled out from the second side of the cableway so that the connecting clamp can drive the traction component to pass through the cableway;

[0020] The traction member is wound around the steering member and the tensioning mechanism, and connected to the drive member to form a cable threading device;

[0021] The tray containing the steel strands is placed on either side of the precast steel beam, and the free end of the steel strands on the tray is connected to the traction component through the connecting clamp. The driving component drives the traction component to move in one direction in a cyclical motion so that the steel strands are threaded on the cableway.

[0022] After the steel strand is passed from the first side of the cableway to the second side, the drive mechanism is turned off, the steel strand near the material tray is cut, and the steel strand located in the cableway is fixed.

[0023] The free ends of the steel strands are repeatedly fixed to the traction machine using connecting clamps, so that multiple steel strands are sequentially threaded into the cableway.

[0024] After the multiple steel strands have been threaded through, the ends of the steel strands located on both sides of the cableway are tensioned and fixed using fasteners. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a rope-threading device provided in the first aspect embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the connecting clamp provided in the first aspect embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of another connecting clamp provided in the first aspect embodiment of the present invention;

[0029] Figure 4 This is a flowchart of a rope-threading method provided in a second aspect embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Precast steel beam; 11. Cableway; 2. Drive unit; 3. Tensioning structure; 4. Material tray; 41. Steel strand; 5. Traction unit; 6. Connecting clamp; 61. Shell; 62. Inner connecting unit; 63. Outer connecting unit; 64. First hoop; 65. Second hoop; 66. Fastener; 7. Steering unit. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Reference Figure 1 As shown, in a first aspect of the invention, the present invention provides a cable-threading device for cable-threading construction of steel strands 41 in a large-span precast steel beam 1, wherein a cableway 11 is provided inside the precast steel beam 1; the device includes: a material tray 4, a driving member 2, a traction member 5, and a connecting clamp 6; the material tray 4 is used to collect and store the steel strands 41; the driving member 2 is disposed on the precast steel beam 1; the first and last ends of the traction member 5 are connected to the driving member 2, and the traction member 5 is threaded through the cableway 11, and the driving member 2 drives the traction member 5 to move in a unidirectional cycle; the connecting clamp 6 is adapted to clamp and connect the steel strands 41 to the traction member 5, and the steel strands 41 move with the traction member 5 so that the steel strands 41 are threaded through the cableway 11.

[0037] Specifically, this invention provides a cable-threading device that, through the configuration of a driving component 2, a traction component 5, and a connecting clamp 6, achieves automatic traction and stable threading of the steel strand 41 within the cableway 11 of the precast steel beam 1. The driving component 2 drives the traction component 5 to achieve unidirectional cyclic movement, avoiding instability caused by repeated back-and-forth traction, thus improving the automation level of the cable-threading operation and significantly increasing efficiency. The steel strand 41 is reliably connected to the traction component 5 via the connecting clamp 6, and moves at a uniform speed along the cableway 11 under the drive of the traction component 5, avoiding jamming or entanglement caused by uneven force or improper guidance, thereby improving the stability and reliability of the cable-threading process. This device has a compact structure and strong adaptability, suitable for the construction requirements of cable-threading in the cableway 11 of ultra-long span precast steel beams 1, improving the overall operational efficiency in the construction process of large-span structures. By replacing traditional manual operation with mechanized and automated means, it not only shortens the cable-threading period but also significantly reduces the reliance on skilled workers on site, saving human resource input.

[0038] In a first aspect of the present invention, the cable threading device further includes a tensioning structure 3, which is disposed on the precast steel beam 1, and the traction member 5 is threaded through the tensioning structure 3, which keeps the traction member 5 in a tensioned state.

[0039] Specifically, the tensioning structure 3 applies continuous tension to the traction member 5, effectively preventing unstable phenomena such as swaying and jumping caused by slackness during the cyclical movement of the traction member 5, thereby improving the continuity and stability of the cable threading process. The tensioned traction member 5 ensures that the steel strand 41 remains straight during the traction and threading process, effectively suppressing abnormal behaviors such as deviation and local accumulation of the steel strand 41 within the cableway 11, and improving the accuracy of cable threading.

[0040] Understandably, the tensioning structure 3 has an adjustment capability, which can flexibly adjust the tension of the traction component 5 according to different span steel beams or different length cableways 11, thereby adapting to various engineering scenarios and improving the applicability and construction convenience of the device. By reasonably controlling the preload of the tensioning structure 3, the traction component 5 can be subjected to uniform force, reducing local wear caused by force fluctuations, which is conducive to the long-term stable operation of the traction component 5 and extends the service life of the entire machine.

[0041] In addition, the traction component 5 operates under tension, which can avoid construction safety accidents caused by the traction component 5 accidentally detaching, getting tangled or stuck, and further protect the personal safety of operators and the quality of construction.

[0042] In a first aspect of the present invention, the cable-threading device further includes a plurality of steering members 7, and the traction member 5 is wound around the steering members 7, the steering members 7 being adapted to adjust the movement direction of the traction member 5.

[0043] Specifically, by rationally arranging the steering components 7, the traction component 5 moves along the optimal path, reducing the additional resistance caused by path deviation during traction, effectively improving traction efficiency, reducing the load on the power unit, and enhancing the overall energy efficiency of the system; the traction component 5 runs along the predetermined route under the guidance of the steering components 7, avoiding problems such as shaking and derailment caused by path drift or unstable posture during operation, ensuring the smooth and continuous operation of the steel strand 41.

[0044] Understandably, the steering component 7 can effectively guide the traction component 5 to a path away from the inner wall of the beam or obstacles, preventing interference problems such as scraping and jamming during traction, and extending the service life of the traction component 5 and the internal structure of the steel beam; through the multi-point layout and angle adjustment capability of the steering component 7, the entire traction system becomes more modular and flexible, making it easy to quickly deploy and debug according to the construction site space and the direction of the cableway 11, and shortening the construction preparation cycle.

[0045] In a first aspect of the present invention, the steering component 7 includes a first steering wheel and a second steering wheel, which are respectively disposed on both sides of the precast steel beam 1, and the first steering wheel, the second steering wheel and the cableway 11 are located on the same horizontal line.

[0046] Specifically, the first and second steering wheels apply guiding action to both sides of the traction member 5 located in the cableway 11, so that the traction member 5 is always in a predetermined horizontal position when passing through the cableway 11, effectively preventing the positional deviation of the traction member 5 due to swinging or uneven force, thereby improving the cable passing accuracy; the steering wheels are on the same horizontal line as the cableway 11, ensuring that the traction member 5 has been adjusted to the correct direction and height before entering the cableway 11, so that the steel strand 41 can enter the cableway 11 smoothly and in a straight line, reducing the occurrence rate of failures such as jamming and bending.

[0047] It is understandable that the first and second steering wheels form symmetrical constraints on the traction component 5, making the force on the traction component 5 more even, reducing problems such as uneven wear of the steering wheels and local wear of the traction component 5 caused by excessive force on one side, and extending the service life of the system.

[0048] In a first aspect of the present invention, both the first steering wheel and the second steering wheel can slide vertically within the width of the cableway 11.

[0049] Specifically, the steering wheel can slide and adjust in the vertical direction to keep the traction component 5 at the same height as the cableway 11 entrance and exit, thereby ensuring that the traction path is always in the optimal centering position, improving the smoothness and success rate of cable threading operations; by adjusting the vertical position of the steering wheel, the path of the traction component 5 when entering the cableway 11 is made straighter and smoother, preventing local stress concentration, bending or wear of the steel strand 41 caused by excessive entry angle, and extending the service life of the steel strand 41.

[0050] Understandably, the first steering wheel and the second guide wheel can be equipped with slide rails or guide grooves to allow operators to quickly adjust the height without replacing components or repositioning, thus improving the efficiency of on-site installation, commissioning and maintenance.

[0051] In a first aspect embodiment of the present invention, both the first steering wheel and the second steering wheel may be provided in multiples.

[0052] Understandably, multiple steering wheels constitute a multi-point guidance system, which helps the traction component 5 maintain a stable and controlled state when traversing complex cableways 11 or long-distance passages, avoiding swaying and deviation during operation, and improving the linearity and consistency of the cable-passing process. In addition, multi-point guidance can evenly distribute the tension and friction of the traction component 5 during operation to each steering wheel, reducing the problem of load concentration at a single steering point and extending the service life of the traction component 5 and the guide wheels.

[0053] According to a first aspect of the present invention, the drive component 2 is a winch.

[0054] Reference Figure 2As shown, in a first aspect embodiment of the present invention, the connecting clamp 6 includes: a housing 61, an inner connector 62, and an outer connector 63; the housing 61 is provided with a mounting cavity; the inner connector 62 can be placed in the mounting cavity, and the inner connector 62 is provided with a mounting groove; one end of the outer connector 63 is connected to the housing 61; the traction member 5 can pass through the housing 61 to be adapted to engage with the mounting groove, and the other end of the outer connector 63 is adapted to be connected to the steel strand 41; or the steel strand 41 can pass through the housing 61 to be adapted to engage with the mounting groove, and the other end of the outer connector 63 is adapted to be connected to the traction member 5.

[0055] Specifically, by setting an installation cavity inside the shell 61, the inner connector 62 with an installation groove 621 can be placed inside the installation cavity. It cooperates with the steel strand 41 or cable to pass through and engage with the installation groove 621, ensuring the steel strand 41 or cable is stably installed in the shell 61. This prevents the steel strand 41 or cable from falling off or knotting during tensioning, improving connection reliability and construction stability. One end of the outer connector 63 connects to the shell 61, and the other end is suitable for connecting to the steel strand 41 or cable, achieving effective adaptation of the steel strand 41 and cable, improving the versatility and structural flexibility of the connecting clamp 6, and making it suitable for various construction scenarios. The proposed structure is rationally designed and easy to assemble, effectively improving work efficiency and shortening construction time during the cableway 11 construction process, and has good industrial application prospects.

[0056] Reference Figure 3 As shown, in a first aspect embodiment of the present invention, the connecting clamp 6 includes: a first clamp 64 and a second clamp 65 arranged in a symmetrical structure, the first clamp 64 and the second clamp 65 cooperating with each other to form a first slot and a second slot in the middle, one end of the steel strand 41 can be placed in the first slot, and one end of the traction member 5 can be placed in the second slot; or one end of the traction member 5 can be placed in the first slot, and one end of the steel strand 41 can be placed in the second slot; a fastener 66 passes through the first clamp 64 and the second clamp 65 to be adapted to fix the first clamp 64 and the second clamp 65 together to clamp and fix the traction member 5 and the steel strand 41.

[0057] Specifically, the first hoop 64 and the second hoop 65 are arranged in a symmetrical structure and connected to each other by fasteners 66. After mating, the first hoop 64 and the second hoop 65 form a first slot and a second slot in the middle, which can respectively accommodate the steel strand 41 or the cable component. The fasteners 66 clamp and fix the steel strand 41 or the cable component, effectively preventing loosening, detachment, or knotting during use. This connecting clamp 6 ensures that the steel strand 41 or the cable component maintains a stable stress state during cable threading, improving safety and reliability during tensioning, avoiding construction interruptions caused by cable instability, significantly improving construction efficiency, and shortening the construction cycle. The connecting clamp 6 of this application has a simple structure, is easy to assemble, operate and maintain, and is suitable for various specifications of cable components. It has strong versatility and promotional value, meeting the needs of practical engineering for efficient and safe connection methods, and has good industrial application prospects.

[0058] Reference Figure 4 As shown, in a second aspect of the invention, the invention also provides a cable-threading method applied to the cable-threading construction of steel strands 41 in a large-span precast steel beam 1, comprising the following steps:

[0059] A section of steel strand 41 is threaded from the first side of the cableway 11 to the second side by a jacking device, and one end of the traction member 5 is connected to one end of the steel strand 41 located outside the first side of the cableway 11 by a connecting clamp 6.

[0060] The steel strand 41 inside the cableway 11 is pulled out from the second side of the cableway 11 so that the connecting clamp 6 drives the traction member 5 to pass through the cableway 11;

[0061] The traction member 5 is wound around the steering member 7 and the tensioning mechanism, and connected to the driving member 2 to form a cable threading device;

[0062] Place the tray 4 containing the steel strand 41 on any side of the precast steel beam 1, and connect the free end of the steel strand 41 on the tray 4 to the traction member 5 through the connecting clamp 6. The driving member 2 drives the traction member 5 to move in a unidirectional cycle so that the steel strand 41 is threaded on the cableway 11.

[0063] After the steel strand 41 is passed from the first side to the second side of the cableway 11, the drive unit 2 is turned off, the steel strand 41 near the material tray 4 is cut, and the steel strand 41 located in the cableway 11 is fixed.

[0064] The free end of the steel strand 41 is repeatedly fixedly connected to the traction machine through the connecting clamp 6 so that multiple steel strands 41 are sequentially threaded into the cableway 11;

[0065] After the multiple steel strands 41 are installed, the ends of the steel strands 41 located on both sides of the cableway 11 are tensioned and fixed by fasteners.

[0066] Specifically, by forming a closed-loop system with the traction component 5 and the drive component 2, the steel strands 41 can be continuously and sequentially threaded through the cable, effectively reducing the tedious operations such as frequent wiring and pulling in the traditional one-time guidance method, and greatly improving the efficiency of cable threading construction. The steering component 7 guides the running path of the traction component 5 and works with the tensioning mechanism to maintain its tension, ensuring that the steel strands 41 run smoothly along the predetermined trajectory throughout the entire threading process, avoiding entanglement and jamming of the steel strands 41 in the cableway 11 due to bending, accumulation, or directional deviation.

[0067] It is understood that the steel strand 41 tray 4 can be placed on either side of the precast steel beam 1, and the traction system can be flexibly deployed around the beam, suitable for different construction environments such as left-right symmetry or limited space, improving the adaptability and flexibility of the construction layout. The steel strand 41 can be quickly loaded and replaced through the connecting clamp 6, and with the continuous operation function of the drive component 2, batch and continuous threading of the steel strand 41 can be achieved, significantly shortening the overall construction cycle. The threading method provided by this invention is highly systematic, efficient, and adaptable, suitable for efficient threading construction of steel strand 41 in large-span precast steel structures, and has significant engineering application value and promotion prospects.

[0068] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A cable-threading device, used for cable-threading construction of steel strands (41) in a large-span precast steel beam (1), wherein a cableway (11) is provided inside the precast steel beam (1); characterized in that, include: The tray (4) is used to collect and store the steel strand (41); A driving component (2) is provided on the precast steel beam (1); The traction member (5) is connected to the drive member (2) at both ends. The traction member (5) is installed inside the cableway (11). The drive member (2) drives the traction member (5) to move in a unidirectional cycle. A connecting clamp (6) is adapted to clamp and connect the steel strand (41) to the traction member (5), wherein the steel strand (41) moves with the traction member (5) so that the steel strand (41) is threaded through the cableway (11).

2. The threading device according to claim 1, characterized in that, It also includes a tensioning structure (3), which is disposed on the precast steel beam (1), and the traction member (5) passes through the tensioning structure (3), and the tensioning structure (3) puts the traction member (5) in a tensioned state.

3. The threading device according to claim 1 or 2, characterized in that, It also includes several steering components (7), the traction component (5) is wound around the steering component (7), and the steering component (7) is adapted to adjust the movement direction of the traction component (5).

4. The threading device according to claim 3, characterized in that, The steering component (7) includes a first steering wheel and a second steering wheel, which are respectively located on both sides of the precast steel beam (1). The first steering wheel, the second steering wheel and the cableway (11) are located on the same horizontal line.

5. The threading device according to claim 4, characterized in that, Both the first and second steering wheels can slide vertically within the width of the cableway (11).

6. The threading device according to claim 4, characterized in that, Both the first steering wheel and the second steering wheel can be provided in multiple quantities.

7. The threading device according to claim 1, characterized in that, The driving component (2) is a winch.

8. The threading device according to claim 1, characterized in that, The connecting clamp (6) includes: a housing (61) having a mounting cavity; An inner connector (62) is provided, which can be placed in the mounting cavity and has a mounting groove. An external connector (63) is provided, one end of which is connected to the housing (61). The traction member (5) can be inserted into the housing (61) to be engaged with the mounting slot, and the other end of the external connector (63) is adapted to be connected to the steel strand (41); or the steel strand (41) can be inserted into the housing (61) to be engaged with the mounting slot, and the other end of the external connector (63) is adapted to be connected to the traction member (5).

9. The threading device according to claim 1, characterized in that, The connecting clamp (6) includes a first hoop (64) and a second hoop (65) arranged in a half-and-half structure. The first hoop (64) and the second hoop (65) cooperate with each other to form a first slot and a second slot in the middle. One end of the steel strand (41) can be placed in the first slot, and one end of the traction member (5) can be placed in the second slot; or one end of the traction member (5) can be placed in the first slot, and one end of the steel strand (41) can be placed in the second slot. Fasteners (66) are inserted through the first hoop (64) and the second hoop (65) to fix the first hoop (64) and the second hoop (65) together to clamp and fix the traction member (5) and the steel strand (41).

10. A cable-threading method applied to the cable-threading construction of steel strands (41) in a large-span precast steel beam (1), characterized in that, Includes the following steps: A section of steel strand (41) is passed from the first side of the cableway (11) to the second side by a jacking device, and one end of the traction member (5) is connected to one end of the steel strand (41) located outside the first side of the cableway (11) by a connecting clamp (6). The steel strand (41) inside the cableway (11) is pulled out from the second side of the cableway (11) so that the connecting clamp (6) drives the traction member (5) to pass through the cableway (11); The traction member (5) is wound around the steering member (7) and the tensioning mechanism, and connected to the driving member (2) to form a cable threading device; Place the tray (4) containing the steel strand (41) on any side of the precast steel beam (1), and connect the free end of the steel strand (41) on the tray (4) to the traction member (5) through the connecting clamp (6). The driving member (2) drives the traction member (5) to move in a one-way cycle so that the steel strand (41) is threaded on the cableway (11). After the steel strand (41) passes from the first side of the cableway (11) to the second side, the drive unit (2) is turned off, the steel strand (41) near the end of the material tray (4) is cut, and the steel strand (41) located in the cableway (11) is fixed. The free end of the steel strand (41) is repeatedly fixedly connected to the traction machine through the connecting clamp (6) so that multiple steel strands (41) are sequentially threaded into the cableway (11); After the multiple steel strands (41) are installed, the ends of the steel strands (41) located on both sides of the cableway (11) are tensioned and fixed by fixing members.

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