Steel strand threading auxiliary device and method

Abstract

The present invention discloses a steel strand bundle threading auxiliary device and method, comprising a power mechanism and a traction mechanism; the power mechanism is arranged at the end of a beam bridge where no steel strand bundle threading operation is being performed; the traction mechanism comprises a traction rod, a first limiting member and a second limiting member; the first end of the traction rod is connected to the output end of the power mechanism, and the second end of the traction rod extends obliquely toward the area between two adjacent spans of the beam bridge; wherein the power mechanism is used to drive the traction rod to move back and forth in the same vertical plane; the first limiting member and the second limiting member are arranged in parallel and spaced apart at the second end of the traction rod, and the prestressed steel strand to be operated is located between the first limiting member and the second limiting member; the present invention continuously provides tension for the prestressed steel strand to be operated through the back and forth reciprocating movement of the traction rod, so that the steel strand moves along the prestressed channel, thereby replacing manual labor in performing the prestressed steel strand bundle threading auxiliary operation in a narrow space, thereby reducing the number of operators and operation time.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel strand bundle threading in bridge engineering, and in particular relates to a steel strand bundle threading auxiliary device and method. Background Art

[0002] With the continuous development of bridge construction technology, continuous beam bridges are widely used due to their advantages such as reliable strength, good crack resistance, comfortable and stable driving, and low maintenance workload. At present, the construction of continuous beam bridges mainly adopts cantilever construction method, bracket construction method and simply supported to continuous construction method. Among them, the cantilever construction method is to set up working platforms on both sides of the bridge piers, and cantilever and cast beam sections in a balanced manner towards the mid-span until the bridge span structure is closed; the simply supported to continuous construction method is to first prefabricate beams and slabs on a large scale according to the simply supported beam bridge and hoist them for construction, and then connect the beams and slabs of adjacent spans into a continuous beam by casting wet joints.

[0003] During the cantilever construction process, in order to prevent the prestressed pipe from being blocked and making it inconvenient to insert the core rod, the prestressed steel strands need to be bundled before the concrete of the closing section is poured; during the simply supported to continuous construction process, the pier top wet joint cast-in-place section needs to first be reinforced with steel bars and bundled with prestressed steel strands, and then concrete is poured and prestressing is tensioned, so that the bridge structure completes the system conversion from simply supported to continuous.

[0004] At present, when a continuous beam bridge is constructed using a cantilever construction method or a simply supported to continuous construction method, the reserved steel bars on both sides of the closed section or wet joint section of the continuous beam bridge are densely protruding and the operating space is narrow, resulting in insufficient operating space for traditional strand threading machines to thread the steel strands. Therefore, manual traction is often used to thread the prestressed steel strands. At the same time, since the steel strands of continuous beam bridges are longer than those of simply supported beams and the frictional resistance with the prestressed corrugated pipes in the prestressed duct is greater, manual strand threading is extremely difficult, requires a large number of workers, and has low construction efficiency. Summary of the Invention

[0005] In response to the technical problems existing in the prior art, the present invention provides a steel strand threading auxiliary device and method to solve the technical problems in the prior art that traditional strand threading machines cannot operate in the narrow space of the closing section or wet joint section of a continuous beam bridge, and the manual construction efficiency is low.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention provides a steel strand bundle threading auxiliary device, which is characterized by being used in the prestressed steel strand bundle threading operation between two adjacent span beam bridges; wherein the steel strand bundle threading auxiliary device includes a power mechanism and a traction mechanism;

[0008] The power mechanism is disposed at an end of the beam bridge where no strand threading operation is being performed; the traction mechanism includes a traction rod, a first limiting member, and a second limiting member; a first end of the traction rod is connected to an output end of the power mechanism, and a second end of the traction rod extends obliquely toward an area between two adjacent spans of the beam bridge; wherein the power mechanism is used to drive the traction rod to reciprocate back and forth within the same vertical plane;

[0009] The first limiting member and the second limiting member are arranged in parallel and spaced apart at the second end of the traction rod, and the prestressed steel strand to be operated is located between the first limiting member and the second limiting member.

[0010] Furthermore, the power mechanism includes a drive motor, a first gear, a second gear and a transmission chain; the drive motor is arranged above the end of the beam bridge where the strand threading operation is not performed, and the drive motor is provided with a first output shaft and a second output shaft which are horizontally parallel;

[0011] The first gear is mounted on the first output shaft, and the second gear is mounted on the second output shaft; wherein, the first gear and the second gear are located in the same vertical plane; one end of the transmission chain is connected to the first gear, and the other end of the transmission chain is connected to the second gear, and the first end of the traction rod is connected to a preset point of the transmission chain.

[0012] Furthermore, the traction mechanism also includes a traction chain rod, which is horizontally arranged and parallel to the first output shaft or the second output shaft; one end of the traction chain rod is connected to a preset point position of the transmission chain, and the other end of the traction chain rod is vertically fixed to the first end of the traction rod.

[0013] Furthermore, the traction rod and the prestressed steel strand to be operated are located in the same vertical plane.

[0014] Furthermore, it also includes a sliding base and a fixed track; the fixed track is horizontally arranged between the power mechanism and the end of the beam bridge where the strand bundle operation is not performed, and the extension direction of the fixed track is perpendicular to the extension direction of the beam bridge where the strand bundle operation is not performed;

[0015] The sliding base is horizontally movably arranged on the fixed track and is placed between the power mechanism and the fixed track.

[0016] Furthermore, the fixed track includes two steel rails; the two steel rails are arranged in parallel and spaced apart, and are both located above the end of the beam bridge where the steel strands are not threaded; a steel pad is provided at the end of the steel rail, the upper end of the steel pad is fixedly connected to the end of the steel rail, and the lower end of the steel pad is detachably fixed to the side wall of the beam bridge where the steel strands are not threaded; the sliding base is horizontally movably arranged between the two steel rails.

[0017] Furthermore, the steel base plate is connected to the side wall of the beam bridge where the strands are not threaded using fixing bolts.

[0018] Furthermore, the sliding base includes a plurality of supporting vertical rods, a plurality of supporting horizontal rods, two longitudinal beams, pulleys and limiting bolts;

[0019] The two longitudinal beams are arranged in parallel and are both arranged along the extension direction of the beam bridge where the stranded wires are not threaded; an oblong hole is opened on the web of the section steel rail, one end of the longitudinal beam is inserted into the oblong hole of one section steel rail, and the other end of the longitudinal beam is inserted into the oblong hole of the other section steel rail;

[0020] The pulley is sleeved on the end of the longitudinal beam and placed between the upper and lower flanges of the steel track and located on the inner side of the web of the steel track; the limit bolt is set at the end of the longitudinal beam and is tightly pressed against the outer surface of the web of the steel track;

[0021] Several of the support vertical bars are evenly arranged vertically on the longitudinal beams, and several of the support cross bars are evenly arranged horizontally between the two longitudinal beams; wherein the support vertical bars and the support cross bars together form a power mechanism fixing space, and the power mechanism is installed in the power mechanism fixing space.

[0022] Furthermore, the adjacent two spans of the beam bridge are adjacent two spans of prefabricated continuous beams or adjacent two spans of cast-in-place beams.

[0023] The present invention also provides a steel strand bundle-threading auxiliary method, utilizing the aforementioned steel strand bundle-threading auxiliary device;

[0024] The steel strand bundle-threading auxiliary method is as follows:

[0025] The steel strand bundle threading auxiliary device is installed at the end of the beam bridge where the steel strand bundle threading operation is not performed, and the prestressed steel strand to be operated is arranged between the first limiting member and the second limiting member;

[0026] The power mechanism is started, and under the driving action of the power mechanism, the traction rod is driven to move back and forth in the same vertical plane, thereby continuously providing tension for the threading operation of the prestressed steel strands to be operated, so that the prestressed steel strands to be operated can move along the predesigned prestressed channel.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention provides a steel strand bundle threading auxiliary device and method, wherein one end of a traction rod is connected to a power mechanism, and the power mechanism is used to drive the traction rod to move back and forth in the same vertical plane, and two limiting components are provided at the other end of the traction rod, and the prestressed steel strand to be operated is placed between the two limiting components; through the back and forth reciprocating movement of the traction rod, continuous tension is provided for the prestressed steel strand to be operated, so that the steel strand moves along the prestressed channel, thereby replacing manual labor to perform prestressed steel strand bundle threading auxiliary operations in a narrow space. The device has a stable structure, high safety, and easy operation, reduces the number of operators and operating time, has high construction efficiency, and reduces construction costs.

[0029] Furthermore, in the power mechanism, the driving motor drives the two gears to rotate, and then drives the transmission chain on the gears to rotate, so that the traction rod is driven to move back and forth through the transmission chain. The power transmission route is clear and the reliability is strong.

[0030] Furthermore, the traction rod and the prestressed steel strand to be operated are arranged in the same vertical plane, which ensures that the traction rod can continuously provide power to the steel strand, while avoiding deflection of the steel strand during the pulling process, ensuring the purpose of precise bundle threading operation.

[0031] Furthermore, by setting a sliding base and a fixed track, horizontal movement of the power mechanism and the transmission mechanism can be achieved, which meets the auxiliary work of threading all steel strands, saves the movement and positioning of the device, and has high stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the steel strand bundle threading auxiliary device of the present invention in use;

[0033] Figure 2 This is a schematic diagram of the overall structure of the steel strand bundle threading auxiliary device of the present invention;

[0034] Figure 3 Schematic diagram of the connection structure between the power mechanism and the traction mechanism in the present invention;

[0035] Figure 4 This is a schematic diagram of the connection structure between the sliding base and the fixed track in the present invention;

[0036] Figure 5 It is a structural schematic diagram of the sliding base in the present invention;

[0037] Figure 6 It is a structural schematic diagram of the fixed track in the present invention.

[0038] Among them, 1 power mechanism, 2 traction mechanism, 3 sliding base, 4 fixed track, 5 beam bridge without steel strand threading operation, 6 prestressed steel strand waiting for operation; 11 driving motor, 12 first gear, 13 second gear, 14 transmission chain; 111 first output shaft, 112 second output shaft; 21 traction rod, 22 traction chain rod, 23 first limiting member, 24 second limiting member; 31 supporting vertical rod, 32 supporting horizontal rod, 33 longitudinal beam, 34 pulley, 35 limiting bolt; 41 steel track, 42 ​​steel pad, 43 fixing bolt. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] As attached Figure 1-6 As shown, the present invention provides a steel strand bundle threading auxiliary device for use in prestressed steel strand bundle threading operations between two adjacent spans of beam bridges; wherein the two adjacent spans of beam bridges are two adjacent spans of prefabricated continuous beams or two adjacent spans of cast-in-place beams; that is, the steel strand bundle threading auxiliary device can be used for steel strand bundle threading in the wet joint area of ​​the prefabricated continuous beam or the closing section of the cast-in-place beam.

[0041] In the present invention, the steel strand threading auxiliary device includes a power mechanism 1, a traction mechanism 2, a sliding base 3 and a fixed track 4.

[0042] The power mechanism 1 is arranged at the end of the beam bridge where the steel strand bundle threading operation is not performed, and the power mechanism 1 is used to provide power for the traction mechanism 2 to move back and forth; one end of the traction mechanism 2 is connected to the output end of the power mechanism 1, and the other end of the traction mechanism 2 is connected to the prestressed steel strand 6 to be operated; the traction mechanism 2 is used to continuously provide tension for the prestressed steel strand 6 to be operated; the fixed track 4 is horizontally arranged between the power mechanism 1 and the end of the beam bridge 5 where the steel strand bundle threading operation is not performed, and the extension direction of the fixed track 4 is perpendicular to the extension direction of the beam bridge 5 where the steel strand bundle threading operation is not performed; the sliding base 3 is horizontally movably arranged on the fixed track 4 and placed between the power mechanism 1 and the fixed track 4; wherein, the sliding base 3 is used to drive the power mechanism 1 to move along the fixed track 4 to realize the auxiliary operation of bundle threading for all prestressed steel strands to be operated.

[0043] In the present invention, the power mechanism 1 includes a drive motor 11, a first gear 12, a second gear 13 and a transmission chain 14; the drive motor 11 is arranged above the end of the beam bridge 5 where the steel strand bundle threading operation is not performed; specifically, the drive motor 11 is installed on the sliding base 3; the drive motor 11 is provided with a first output shaft 111 and a second output shaft 112, the first output shaft 111 and the second output shaft 112 are arranged horizontally and parallel, and the axial direction of the first output shaft 111 and the second output shaft 112 is arranged perpendicular to the extension direction of the beam bridge 5 where the steel strand bundle threading operation is not performed.

[0044] The first gear 12 is mounted on the first output shaft 111, and the second gear 13 is mounted on the second output shaft 112; wherein, the first gear 12 and the second gear 13 are located in the same vertical plane; one end of the transmission chain 14 is connected to the first gear 12, and the other end of the transmission chain 14 is connected to the second gear 13.

[0045] In the present invention, the traction mechanism 2 includes a traction rod 21, a traction chain rod 22, a first limiting member 23 and a second limiting member 24; the first end of the traction rod 21 is connected to the output end of the power mechanism 1, and the second end of the traction rod 21 extends obliquely toward the area between the two adjacent spans of the beam bridge; wherein the traction rod 21 and the prestressed steel strand 6 to be operated are located in the same vertical plane, ensuring that the traction rod can continuously provide power to the steel strand, while avoiding deflection of the steel strand during the pulling process, thereby ensuring the purpose of precise bundle threading operation.

[0046] Specifically, the traction chain rod 22 is arranged horizontally and parallel to the first output shaft 111 or the second output shaft 112; one end of the traction chain rod 22 is connected to a preset point of the transmission chain 14, and the other end of the traction chain rod 22 is vertically fixed to the first end of the traction rod 21; wherein, when the driving motor is turned on, the transmission chain 14 moves in an elliptical trajectory along with the first gear 12 and the second gear 13, and the traction chain rod 22 is welded to the transmission chain, thereby driving the entire traction mechanism 2 to perform reciprocating motion back and forth.

[0047] The first limiting member 23 and the second limiting member 24 are arranged in parallel and at intervals at the second end of the traction rod 21, and the prestressed steel strand 6 to be operated is located between the first limiting member 23 and the second limiting member 24; wherein, the spacing between the first limiting member 23 and the second limiting member 24 matches the diameter size of the prestressed steel strand 6 to be operated; the first limiting member 23 and the second limiting member 24 are both arranged perpendicular to the traction rod 21; preferably, the first limiting member 23 and the second limiting member 24 are both rod structures made of threaded steel.

[0048] In the present invention, the sliding base 3 includes a plurality of supporting vertical rods 31, a plurality of supporting horizontal rods 32, two longitudinal beams 33, a pulley 34 and a limiting bolt 35; the two longitudinal beams 33 are arranged in parallel and are both arranged along the extension direction of the beam bridge 5 where the steel strand threading operation is not performed.

[0049] An oblong hole is provided on the web of the steel rail 41 in the fixed track 4, one end of the longitudinal beam 33 is inserted into the oblong hole of one of the steel rails, and the other end of the longitudinal beam 33 is inserted into the oblong hole of the other steel rail; the pulley 34 is sleeved on the end of the longitudinal beam 33 and placed between the upper and lower flanges of the steel rail 41, and located on the inner side of the web of the steel rail 41; the limiting bolt 35 is provided at the end of the longitudinal beam 33 and is tightly pressed against the outer surface of the web of the steel rail 41.

[0050] Several of the support vertical rods 31 are vertically and evenly arranged on the longitudinal beam 33, and several of the support cross rods 32 are horizontally and evenly arranged between the two longitudinal beams 33; wherein, the support vertical rods 31 and the support cross rods 32 together form a fixed space for the power mechanism, and the drive motor 11 in the power mechanism 1 is installed in the fixed space for the power mechanism; specifically, the top and inner side surfaces of the longitudinal beam 33 are provided with equally spaced mounting holes, and the diameters of the mounting holes are respectively matched with the diameters of the support vertical rods 31 and the support cross rods 32; after the longitudinal beam 33 and the pulley 34 are in appropriate positions, the support vertical rods 31 and the support cross rods 32 are inserted into the corresponding mounting holes on the longitudinal beam 33 to form an integral sliding base 3; finally, a limiting bolt 35 is set at the end of the longitudinal beam 33 to use the limiting bolt 35 to fix the sliding base 3 to the steel rail 41.

[0051] In the present invention, the fixed track 4 includes two steel rails 41; the two steel rails 41 are arranged in parallel and at intervals, and are both located above the end of the beam bridge where the steel strand threading operation is not performed; preferably, the steel rails 41 are made of H-shaped steel, the web of the H-shaped steel is arranged vertically, and an oblong hole is opened on the web of the H-shaped steel, and the long axis direction of the oblong hole is arranged horizontally; wherein, the oblong hole is pre-set on the steel rail 41 to facilitate the installation and movement of the sliding base 3; the longitudinal beam 33 is horizontally arranged between the two steel rails 41, and the longitudinal beam 33 and the steel rail 41 are arranged perpendicular to each other.

[0052] A steel plate 42 is provided at the end of the steel track 41, the upper end of the steel plate 42 is fixedly connected to the end of the steel track 41, and the lower end of the steel plate 42 is detachably fixed to the side wall of the beam bridge where the steel strands are not threaded; preferably, the steel plate 42 is connected to the side wall of the beam bridge 5 where the steel strands are not threaded by a fixing bolt 43, and each of the steel plate 42 is fixedly connected to the beam bridge 5 where the steel strands are not threaded by a fixing bolt 43; specifically, the steel track 41 and the steel plate 42 are connected by welding, and each steel plate 42 is provided with two upper and lower reserved holes, and the fixing bolts 43 fix the fixed track 4 as a whole through the reserved holes.

[0053] Assembly process:

[0054] In the present invention, when the prestressed steel strand needs to pass through the closing section or wet joint area between two adjacent spans of the beam bridge, first, the steel track 41 and the steel pad 42 are combined and placed at the end of the beam bridge where the steel strand bundle threading operation is not performed, and the fixing bolts 43 are inserted into the reserved holes on the steel pad 42 to fix it on both sides of the beam bridge to form a fixed track 4; when the fixed track 4 is installed, the longitudinal beam 33 is inserted into the oblong hole reserved on the steel track 41, and limiting bolts 35 are set at both ends of the longitudinal beam 33 for fixing, and then the support vertical rod 31 and the support horizontal rod 32 are respectively inserted into the corresponding installation holes on the longitudinal beam 33 to form an integral sliding base 3; thereafter, the drive motor 11 is installed on the sliding base 3, and the traction rod 21 is connected to the transmission chain 14 through the traction chain rod 22. At this point, the installation of the steel strand bundle threading auxiliary device is completed.

[0055] It should be noted that when the steel strands at the same position are bundled, the limit bolts 35 are loosened, and the longitudinal beam 33 and its upper structure are driven to move as a whole through the pulley 34 located in the flange plate of the steel track 41. When the device moves to the next prestressed corrugated pipe, the limit bolts 35 are used to fix it again, and then the steel strand bundle operation at this position is carried out until the steel strand bundle construction of the entire continuous beam wet joint is completed.

[0056] The present invention also provides a steel strand bundle-threading auxiliary method, comprising:

[0057] The steel strand bundle threading auxiliary device is installed at the end of the beam bridge where the steel strand bundle threading operation is not performed, and the prestressed steel strand to be operated is set between the first limiting member 23 and the second limiting member 24; the power mechanism 1 is started, and the traction rod 21 is driven to move back and forth in the same vertical plane under the driving action of the power mechanism 1, thereby continuously providing tension for the bundle threading operation of the prestressed steel strand to be operated, so that the prestressed steel strand to be operated can move along the predesigned prestressed channel.

[0058] The following describes the steel strand bundle-threading auxiliary method in detail by taking the steel strand bundle-threading auxiliary device as an example of a single prestressed steel strand bundle-threading process, as follows:

[0059] When using the steel strand bundle threading auxiliary device to perform a single bundle steel strand bundle threading operation, the first limiting member 23 and the second limiting member are placed outside the prestressed steel strand to be operated, and the traction mechanism 2 is driven by the power mechanism 1 to perform reciprocating motion back and forth to continuously provide tension for the steel strand bundle threading.

[0060] Specifically, the following steps are included:

[0061] After the drive motor 11 starts, the traction chain rod 22 makes a horizontal linear motion from the top of the first gear 12 to the top of the second gear 13. At this time, the angle between the traction rod 21 and the prestressed steel strand 6 to be operated is the largest, and the friction force between the second limiting member 24 and the prestressed steel strand 6 to be operated is 0. The traction mechanism 2 moves horizontally to the right as a whole, and the prestressed steel strand 6 to be operated does not move.

[0062] The driving motor 11 continues to rotate, and as the traction chain rod 22 rotates from the top of the second gear 13 to the bottom of the second gear 13, the angle between the traction rod 21 and the prestressed steel strand 6 to be operated gradually becomes smaller, and the friction force between the second limiting member 24 and the prestressed steel strand 6 to be operated gradually increases. When it rotates to the bottom of the second gear 13, the friction force reaches its maximum.

[0063] The driving motor 11 continues to rotate, and the traction chain rod 22 makes a horizontal linear motion from the bottom of the second gear 13 to the bottom of the first gear 12. The traction rod 21 relies on the static friction generated between the first limiting member 23 and the second limiting member 24 and the prestressed steel strand 6 to be operated to drive the prestressed steel strand 6 to be operated to make a horizontal linear motion, and the prestressed steel strand 6 to be operated moves forward along the prestressed channel.

[0064] The driving motor 11 continues to rotate, and during the process of the traction chain rod 22 rotating from the bottom of the first gear 12 to the top of the first gear 12, the angle between the traction rod 21 and the prestressed steel strand 6 to be operated gradually increases, and the friction between the second limiting member 24 and the prestressed steel strand 6 to be operated gradually decreases; when the traction chain rod 22 rotates to the top of the first gear 12, the friction force is 0, and a working cycle is completed until the steel strand threading operation at this position is completed, and then the steel strand threading auxiliary device at the wet joint of the multi-span prefabricated continuous beam is moved to the next position to be threaded.

[0065] In the present invention, the power mechanism can provide the traction mechanism with power for moving forward and backward; the traction rod in the traction mechanism is connected to the power mechanism through a traction chain rod welded on the transmission chain, clamping the steel strands at the closing section or wet joint position between the two adjacent spans of the beam bridge and inserting them into the next stage beam bridge; the sliding base is used to support the power mechanism and the traction mechanism, and the sliding base can move on a fixed track installed on the upper part of the beam bridge deck, thereby adjusting the position of the entire device to complete all steel strand bundle threading operations.

[0066] The steel strand bundle threading auxiliary device and method described in the present invention can provide traction power for the steel strand bundle threading at the closing section of the cast-in-place beam bridge or the wet joint between the prefabricated beam bridge, and assist the steel strand to be inserted into the next span of the prefabricated beam bridge, which can effectively replace the traditional manual pulling and threading steel strand operation method. It is simple to operate and has high safety, and can greatly improve the steel strand bundle threading efficiency; it meets the steel strand bundle threading function at the wet joints in the continuous beam bridge structure of the first simple support and then continuous method, or at the closing section of the cast-in-place beam in the continuous beam bridge of the cantilever construction method, has high construction efficiency, reduces the number of operators and operation time, and achieves the purpose of reducing construction costs.

[0067] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention.

Claims

1. A steel strand threading auxiliary device, characterized in that: Used in the prestressed steel strand threading operation between two adjacent span beam bridges; wherein the steel strand threading auxiliary device comprises a power mechanism (1) and a traction mechanism (2); The power mechanism (1) is arranged at an end of a beam bridge where a strand threading operation is not performed; the traction mechanism (2) comprises a traction rod (21), a first position-limiting member (23), and a second position-limiting member (24); a first end of the traction rod (21) is connected to an output end of the power mechanism (1), and a second end of the traction rod (21) extends obliquely toward an area between two adjacent spans of the beam bridge; wherein the power mechanism (1) is used to drive the traction rod (21) to move back and forth in the same vertical plane; The first limiting member (23) and the second limiting member (24) are arranged in parallel and spaced apart at the second end of the traction rod (21), and the prestressed steel strand to be operated is located between the first limiting member (23) and the second limiting member (24); The power mechanism (1) comprises a drive motor (11), a first gear (12), a second gear (13) and a transmission chain (14); the drive motor (11) is arranged above the end of the beam bridge where no strand threading operation is performed, and the drive motor (11) is provided with a first output shaft (111) and a second output shaft (112) which are horizontally parallel; The first gear (12) is mounted on the first output shaft (111), and the second gear (13) is mounted on the second output shaft (112); wherein the first gear (12) and the second gear (13) are located in the same vertical plane; one end of the transmission chain (14) is connected to the first gear (12), and the other end of the transmission chain (14) is connected to the second gear (13); and the first end of the traction rod (21) is connected to a preset point of the transmission chain (14); The traction mechanism (2) further includes a traction chain rod (22), the traction chain rod (22) being arranged horizontally and parallel to the first output shaft (111) or the second output shaft (112); one end of the traction chain rod (22) is connected to a preset point of the transmission chain (14), and the other end of the traction chain rod (22) is vertically fixed to the first end of the traction rod (21); It also includes a sliding base (3) and a fixed track (4); the fixed track (4) is horizontally arranged between the power mechanism (1) and the end of the beam bridge where the stranded wire bundle operation is not performed, and the extension direction of the fixed track (4) is perpendicular to the extension direction of the beam bridge where the stranded wire bundle operation is not performed; The sliding base (3) is horizontally movably arranged on the fixed track (4) and is placed between the power mechanism (1) and the fixed track (4).

2. A steel strand threading auxiliary device according to claim 1, characterized in that: The traction rod (21) and the prestressed steel strand to be operated are located in the same vertical plane.

3. The steel strand threading auxiliary device according to claim 1, characterized in that: The fixed track (4) comprises two section steel tracks (41); the two section steel tracks (41) are arranged in parallel and spaced apart, and are both located above the end of the beam bridge where the stranded wire bundle operation is not performed; a steel pad (42) is provided at the end of the section steel track (41), the upper end of the steel pad (42) is fixedly connected to the end of the section steel track (41), and the lower end of the steel pad (42) is detachably fixed to the side wall of the beam bridge where the stranded wire bundle operation is not performed; the sliding base (3) is horizontally movably arranged between the two section steel tracks (41).

4. A steel strand threading auxiliary device according to claim 3, characterized in that: The steel backing plate (42) is connected to the side wall of the beam bridge where the stranded wires are not threaded using fixing bolts (43).

5. The steel strand threading auxiliary device according to claim 3, characterized in that: The sliding base (3) includes a plurality of supporting vertical rods (31), a plurality of supporting horizontal rods (32), two longitudinal beams (33), a pulley (34) and a limiting bolt (35); The two longitudinal beams (33) are arranged in parallel and are both arranged along the extension direction of the beam bridge where the stranded wire is not threaded; an oblong hole is opened on the web of the section steel rail (41), one end of the longitudinal beam (33) is inserted into the oblong hole of one section steel rail, and the other end of the longitudinal beam (33) is inserted into the oblong hole of the other section steel rail; The pulley (34) is sleeved on the end of the longitudinal beam (33), and is placed between the upper and lower flanges of the steel track (41), and is located on the inner side of the web of the steel track (41); the limiting bolt (35) is set at the end of the longitudinal beam (33) and is tightly arranged against the outer surface of the web of the steel track (41); A plurality of the support vertical rods (31) are evenly arranged vertically on the longitudinal beams (33), and a plurality of the support cross rods (32) are evenly arranged horizontally between two longitudinal beams (33); wherein the support vertical rods (31) and the support cross rods (32) together form a power mechanism fixing space, and the power mechanism (1) is installed in the power mechanism fixing space.

6. The steel strand threading auxiliary device according to claim 1, characterized in that: The adjacent two-span beam bridge is a prefabricated continuous beam with two adjacent spans or a cast-in-place beam with two adjacent spans.

7. A steel strand bundle assisting method, characterized in that: Utilizing a steel strand threading auxiliary device as described in any one of claims 1 to 6; The steel strand bundle-threading auxiliary method is as follows: The steel strand threading auxiliary device is installed at the end of the beam bridge where the steel strand threading operation is not performed, and the prestressed steel strand to be operated is arranged between the first limiting member (23) and the second limiting member (24); The power mechanism (1) is started, and the traction rod (21) is driven to move back and forth in the same vertical plane under the driving action of the power mechanism (1), thereby continuously providing tension for the threading operation of the prestressed steel strand to be operated, so that the prestressed steel strand to be operated moves along the pre-designed prestressed channel.

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