High pier steel strand pulling device and pulling method

Abstract

The invention belongs to the field of municipal bridge engineering, and particularly relates to a high-pier steel strand pulling device and method, and the method comprises the following steps: S1, building an operation platform according to the height of a beam and the cross section size of a pier top, hanging a strand pulling machine on the operation platform by using a chain block, and connecting a conveying device; the method comprises the following steps: S1, installing a steel strand, drawing out the end of the steel strand from the steel strand, and penetrating the end of the steel strand into a strand inlet of a strand pulling machine, S3, after all installation is ready, starting the strand pulling machine to start conveying the steel strand until the end of the steel strand penetrates out of a strand outlet of the strand pulling machine and enters a conveying device, and S4, conveying the steel strand into a prestressed duct by the conveying device, and performing strand pulling construction on the prestressed duct. The device is suitable for the working conditions of limited construction space and ultrahigh steel strand conveying height, the construction safety is guaranteed, and the construction efficiency and quality are improved.

Description

Technical Field

[0001] The invention belongs to the field of municipal bridge engineering, in particular to a high pier steel strand bundle threading device and a bundle threading method. Background Art

[0002] With the development of infrastructure construction in my country, bridges across rivers and ditches are being or have been built. Due to the limitations of the line terrain and slope, more and more bridge piers are designed to be super high, and the prestressed construction of steel strands has to be completed at high altitudes.

[0003] The prestressed construction process of using a stranding machine to thread steel strands is an essential and important process in prestressed engineering construction. However, at an altitude of more than 20 meters, the spatial environment is complex and the distance is long. Manual guidance is required every time the steel strand coils are replaced, which is labor-intensive, has a long construction period, consumes a lot of manpower, and has low construction efficiency. In addition, due to the rigidity of the steel strands themselves, the construction process is not very safe.

[0004] Therefore, it is urgent to design a steel strand bundle threading device and a bundle threading construction method to be suitable for working conditions with narrow construction space and long steel strand transmission distance, so as to ensure construction safety and improve construction efficiency and quality. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a high pier steel strand bundle threading device and bundle threading method described in the present invention comprises the following steps:

[0007] S1: Set up the operating platform according to the beam height and pier top cross-section size, hang the beam threading machine on the operating platform with a hand chain hoist, and connect the transmission device;

[0008] S2: Place the steel strand on a steel strand stand, pull out the end of the steel strand from the steel strand, and insert the end of the steel strand into the wire inlet of the bundle threading machine;

[0009] S3: After everything is installed, start the stranding machine to start conveying the steel strands until the ends of the steel strands pass through the stranding machine outlet and enter the conveying device;

[0010] S4: The conveying device conveys the steel strands into the prestressed duct and performs bundle threading construction into the prestressed duct.

[0011] A high pier steel strand bundle threading device, which is applied to the above-mentioned high pier steel strand bundle threading method, includes a bundle threading machine, a conveying device, a hand hoist, an operating platform, and a steel strand stand of steps S1 to S4. The bundle threading machine is suspended on the operating platform by a hand hoist, one end of the conveying device is connected to the hand hoist, and the other end is connected to the prestressed duct. The hand hoist is used to hang the hand hoist, and the operating platform is set on the top of the beam end pier, and both ends are firmly fixed to the end steel bars by threaded steel bars. The steel strand stand is used to erect a whole bundle of steel strands to reduce the resistance of the steel strand bundle threading. The steel strand passes through the bundle threading machine and is guided by the conveying device to the prestressed duct for bundle threading construction.

[0012] Preferably, the hand chain hoist is a 3m transparent steel pipe with an inner wall, and the operating platform is a buckle rack with a vertical and horizontal spacing of 60cm and a step distance of 1m.

[0013] Preferably, the steel strand stand is constructed of steel pipes, and is a two-layer windmill-type frame body formed by connecting steel pipes.

[0014] Preferably, the bundle threading machine includes a wire inlet connected and fixed on one side of the bundle threading machine, a wire outlet connected and fixed on the other side of the bundle threading machine, two lifting ears fixed on the top of the bundle threading machine, and a correction component arranged inside the wire outlet to prevent the steel strand from deflecting.

[0015] Preferably, the correction component includes a plurality of anti-deflection wheels arranged at the upper and lower ends of the inner cavity of the wire outlet, a rotating cylinder rotatably connected to the inner wall of the wire outlet at both sides of the anti-deflection wheel, a sliding disk slidably inserted in the inner cavity of the rotating cylinder, a spring fixed at a position on the side of the inner cavity of the rotating cylinder away from the sliding disk, a support rod inserted through the upper and lower ends of the sliding disk, and a connecting shaft fixed at a position on the side of the sliding disk away from the spring, one side of the connecting shaft extends out of the outside of the rotating cylinder at an adjacent position and is fixed to the middle position of one side of the anti-deflection wheel at an adjacent position, both sides of the support rod are fixed to the inner wall of the rotating cylinder at an adjacent position, and the middle position of the cross section of the anti-deflection wheel is V-shaped.

[0016] The transmission gear of the present invention is a gear which is connected with the gear of the driven gear to the external peripheral edge of the gear train, and the gear is connected with the gear of the driven gear to the external peripheral edge of the gear train, and the gear is connected with the gear of the driven gear to the external peripheral edge of the gear train.

[0017] Preferably, the correction assembly also includes a connecting plate fixed to the movable plate and extending to the inside of the wire outlet, a mounting bracket arranged on one side of the movable plate, a resistance wheel rotatably connected to the inner surface of the mounting bracket, a movable rod fixedly sleeved on the outer peripheral surface of the resistance wheel, two limiting rods slidingly inserted through the surface of the connecting plate, and a telescopic rod fixed at the middle position between the mounting bracket and the adjacent connecting plate, one side of the limiting rod is fixed to the surface of the adjacent mounting bracket.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention is suitable for working conditions where construction space is limited and the steel strand transmission height is extremely high, ensuring construction safety and improving construction efficiency and quality.

[0020] 2. The present invention can facilitate the guiding and conveying of the steel strands after they are bundled at the outlet through the function of the deviation correction component, thereby improving the overall stability of the movement of the steel strands after they are bundled, solving the problem of positional deviation between the steel strands and the installation pipe after they pass through the bundle threading machine, and improving the overall installation efficiency of the steel strands after they are bundled. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a schematic flow chart of the method of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the beam threading machine of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the outlet of the present invention;

[0026] Figure 5 It is a schematic structural cross-sectional view of the cable outlet of the present invention as viewed from the side;

[0027] Figure 6 In the present invention Figure 5 A schematic diagram of the structure at center A;

[0028] Figure 7 In the present invention Figure 5 A magnified schematic diagram of the structure at B in the middle;

[0029] Figure 8 In the present invention Figure 5 A magnified schematic diagram of the structure at C in the middle;

[0030] In the figure: 1. Bundle threading machine; 2. Conveying device; 3. Hand hoist; 4. Operating platform; 5. Steel strand stand; 6. Wire inlet; 7. Wire outlet; 8. Lifting eye; 9. Anti-skew wheel; 10. Rotating cylinder; 11. Sliding plate; 12. Connecting shaft; 13. Support rod; 14. Spring; 15. Movable shaft; 16. Connecting plate; 17. First tooth plate; 18. Fixed block; 19. Rotating shaft; 20. Circular gear; 21. Second tooth plate; 22. Movable plate; 23. Connecting plate; 24. Mounting frame; 25. Limit rod; 26. Movable rod; 27. Contact wheel; 28. Telescopic rod. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] Example 1:

[0033] like Figure 1 As shown, a method for bundling steel strands in a high pier according to an embodiment of the present invention includes the following steps:

[0034] S1: Set up the operating platform 4 according to the beam height and pier top cross-sectional dimensions, hang the beam threading machine 1 on the operating platform using the hand chain hoist 3, and connect the conveyor 2;

[0035] S2: Stand the steel strand on the steel strand stand 5, pull out the end of the steel strand from the steel strand, and insert the end of the steel strand into the wire inlet of the bundle threading machine 1;

[0036] S3: After everything is installed, start the stranding machine 1 to start the steel strand transmission until the end of the steel strand passes through the stranding machine outlet and enters the transmission device 2.

[0037] S4: The conveying device 2 conveys the steel strand into the prestressed duct and performs strand threading construction on the prestressed duct.

[0038] Compared with the existing technology, the present invention is suitable for working conditions with limited construction space and ultra-high steel strand transmission height, ensuring construction safety and improving construction efficiency and quality.

[0039] Example 2:

[0040] like Figures 2 to 8As shown, a high pier steel strand bundle threading device of the present invention is applied to the above-mentioned high pier steel strand bundle threading method, steps S1 to S4 include a bundle threading machine 1, a conveying device 2, a hand hoist 3, an operating platform 4, and a steel strand stand 5. The bundle threading machine 1 is suspended on the operating platform by the hand hoist 3, one end of the conveying device 2 is connected to the hand hoist 3, and the other end is connected to the prestressed duct. The hand hoist 3 is used to hang the hand hoist 3 to ensure that the bundle threading machine 1 and the prestressed corrugated pipe are at the same elevation, the operating platform 4 is set on the top of the beam end pier, and both ends are firmly fixed to the end steel bars by threaded steel bars, the steel strand stand 5 is used to erect a whole bundle of steel strands to reduce the resistance of steel strand bundle threading, and the steel strand passes through the bundle threading machine 1 and is guided by the conveying device 2 to the prestressed duct for bundle threading construction.

[0041] like Figure 2 As shown, the hand chain hoist 3 is a 3m inner wall transparent steel pipe, and the operating platform 4 is a buckle frame with a vertical and horizontal spacing of 60cm and a step distance of 1m.

[0042] like Figure 2 As shown, the steel strand frame is constructed of steel pipes and is a two-layer windmill-type frame body connected by steel pipes.

[0043] like Figures 3 to 8 As shown, the bundle threading machine 1 includes a wire inlet 6 connected and fixed to one side of the bundle threading machine 1, a wire outlet 7 connected and fixed to the other side of the bundle threading machine 1, two lifting ears 8 fixed to the top of the bundle threading machine 1, and a correction component arranged inside the wire outlet 7 to prevent the steel strand from deflecting;

[0044] The function of the deviation correction component can facilitate the guiding and conveying of the steel strands after being bundled at the outlet 7, thereby improving the overall stability of the movement of the steel strands after being bundled, solving the problem of positional deviation between the steel strands and the installation pipe after passing through the bundle threading machine, and improving the overall installation efficiency of the steel strands after being bundled.

[0045] like Figures 3 to 8 As shown, the deviation correction component includes a plurality of anti-deviation wheels 9 arranged at the upper and lower ends of the inner cavity of the wire outlet 7, a rotating cylinder 10 rotatably connected to the inner wall of the wire outlet 7 at both sides of the anti-deviation wheel 9, a sliding disk 11 slidably inserted in the inner cavity of the rotating cylinder 10, a spring 14 fixed to the inner cavity of the rotating cylinder 10 at a position away from the sliding disk 11, a support rod 13 inserted through the upper and lower ends of the sliding disk 11, and a connecting shaft 12 fixed to the side of the sliding disk 11 away from the spring 14, one side of the connecting shaft 12 extends out of the outside of the rotating cylinder 10 at an adjacent position and is fixed to the middle position of one side of the anti-deviation wheel 9 at an adjacent position, both sides of the support rod 13 are fixed to the inner wall of the rotating cylinder 10 at an adjacent position, and the middle position of the cross section of the anti-deviation wheel 9 is V-shaped;

[0046] When the steel strand extends through the outlet 7, it will be located in the middle position of the two sets of anti-skew wheels 9, and thus will be clamped and limited by the V-shaped structure in the middle position of the two sets of anti-skew wheels 9. When the steel strand is transported by the bundle threading machine 1 and moves toward the outside of the outlet 7, it will generate friction with the anti-skew wheel 9, exerting force on the anti-skew wheel 9, thereby driving the connecting shaft 12 and the sliding disk 11 to rotate, so that the sliding disk 11 can resist the support rod 13 to enable the rotating cylinder 10 to rotate, so that the anti-skew wheel 9 can rotate when it generates friction with the steel strand, thereby avoiding the steel strand from getting stuck inside the outlet 7, and when the steel strand is shaken due to external force during transportation, it resists the anti-skew wheel 9 to displace it in the horizontal direction, thereby driving the connecting shaft 12 to move in the horizontal direction, and the two springs 14 are deformed under the action of the sliding disk 11, so that the shaking amplitude of the steel strand can be reduced by the rebound force of the spring 14.

[0047] like Figures 3 to 8 As shown, the deviation correction assembly also includes a movable shaft 15 fixed to a position on the side of the sliding disk 11 away from the connecting shaft 12, a connecting plate 16 fixed to a position where the movable shaft 15 extends out of the outer portion of the wire outlet 7, a first toothed plate 17 fixed to one end of the connecting plate 16, a plurality of fixed blocks 18 fixed to both sides of the outer circumference of the wire outlet 7, a rotating shaft 19 rotatably connected to a middle position between two adjacent fixed blocks 18, a circular gear 20 fixedly sleeved on the outer circumference of the rotating shaft 19, a second toothed plate 21 meshingly arranged at a middle position between two adjacent circular gears 20, and a movable plate 22 fixed to one side of the second toothed plate 21, the movable plate 22 is slidably connected to the inner wall of the wire outlet 7, the movable shaft 15 is slidably connected to the rotating cylinder 10 and the inner wall of the wire outlet 7, and the circular gear 20 is meshedly connected to the first toothed plate 17 at an adjacent position;

[0048] When the steel strand deviates to one side, under the connecting action of the connecting shaft 12, the sliding plate 11 on the deviated side of the steel strand slides in the horizontal direction, thereby driving the movable shaft 15 to slide in the deviated direction, so that under the connecting action of the connecting plate 16, the first tooth plate 17 on the deviated side can move in the direction away from the outlet 7, so that under the meshing action of the first tooth plate 17 and the adjacent circular gear 20, the circular gear 20 and the rotating shaft 19 rotate, so that under the meshing action of the two circular gears 20 on the second tooth plate 21, the second tooth plate 21 can drive the movable plate 22 to move toward the inside of the outlet 7.

[0049] like Figures 3 to 8As shown, the correction assembly also includes a connecting plate 23 fixed to the movable plate 22 and extending to the inside of the outlet 7, a mounting bracket 24 provided on one side of the movable plate 22, a contact wheel 27 rotatably connected to the inner surface of the mounting bracket 24, a movable rod 26 fixedly sleeved on the outer circumference of the contact wheel 27, two limiting rods 25 slidably inserted through the surface of the connecting plate 23, and a telescopic rod 28 fixed at a middle position between the mounting bracket 24 and the adjacent connecting plate 23, one side of the limiting rod 25 is fixed to the surface of the adjacent mounting bracket 24;

[0050] When the steel strand deviates to one side, the movable plate 22 on the deviated side of the steel strand can move toward the inside of the outlet 7, thereby driving the connecting plate 23 and the mounting bracket 24 to move deeper into the outlet 7, so that the movable rod 26 can contact the steel strand to prevent it from continuing to deviate, and when the movable rod 26 contacts the steel strand, the telescopic rod 28 will be deformed, thereby further reducing the shaking range of the steel strand under the action of the rebound force of the telescopic rod 28, and because the movable rod 26 can rotate to reduce the friction between it and the steel strand, thereby preventing the steel strand from getting stuck inside the outlet 7, the setting of the limit rod 25 can ensure that when the telescopic rod 28 is deformed and the distance between the connecting plate 23 and the mounting bracket 24 changes, the movement trajectory of the mounting bracket 24 is limited to make it more stable.

[0051] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0052] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for threading a high pier steel strand bundle, characterized in that: The following steps are involved: S1: Set up the operating platform (4) according to the beam height and the cross-sectional dimensions of the pier top, hang the beam threading machine (1) on the operating platform using a hand chain hoist (3), and connect the conveying device (2); S2: placing the steel strand on a steel strand stand (5), pulling out the end of the steel strand from the steel strand, and inserting the end of the steel strand into the wire inlet of the bundle threading machine (1); S3: After everything is installed, start the stranding machine (1) to start conveying the steel strands until the ends of the steel strands pass through the stranding machine outlet and enter the conveying device (2); S4: The conveying device (2) conveys the steel strands into the prestressed duct and performs the stranding construction into the prestressed duct.

2. A high-pier steel strand bundle threading device, which is applied to the above-mentioned high-pier steel strand bundle threading method, characterized by: The invention comprises a bundle threading machine (1) of steps S1 to S4, a conveying device (2), a hand chain hoist (3), an operating platform (4), and a steel strand stand (5). The bundle threading machine (1) is suspended on the operating platform by the hand chain hoist (3). One end of the conveying device (2) is connected to the hand chain hoist (3), and the other end is connected to the prestressed duct. The hand chain hoist (3) is used to suspend the hand chain hoist (3). The operating platform (4) is set on the top of the beam end pier, and both ends are fixed to the end steel bars by threaded steel bars. The steel strand stand (5) is used to stand up a whole bundle of steel strands to reduce the resistance of the steel strands to the bundle threading. The steel strands pass through the bundle threading machine (1) and are guided by the conveying device (2) to the prestressed duct for bundle threading construction.

3. The high pier steel strand bundle threading device and bundle threading method according to claim 2, characterized in that: The hand chain hoist (3) is a 3m-long transparent steel pipe with an inner wall, and the operating platform (4) is a buckle rack with a vertical and horizontal spacing of 60cm and a step distance of 1m.

4. The high pier steel strand bundle threading device and bundle threading method according to claim 2, characterized in that: The steel strand stand is constructed of steel pipes and is a two-layer windmill-type frame body formed by connecting the steel pipes.

5. The high pier steel strand bundle threading device and bundle threading method according to claim 2, characterized in that: The bundle threading machine (1) comprises a wire inlet (6) connected and fixed to one side of the bundle threading machine (1), a wire outlet (7) connected and fixed to the other side of the bundle threading machine (1), two lifting ears (8) fixed to the top of the bundle threading machine (1), and a deviation correction component arranged inside the wire outlet (7) to prevent the steel strand from deflecting.

6. The high pier steel strand bundle threading device and bundle threading method according to claim 5, characterized in that: The correction component comprises a plurality of anti-deflection wheels (9) arranged at the upper and lower ends of the inner cavity of the outlet (7), a rotating cylinder (10) rotatably connected to the inner wall of the outlet (7) at positions on both sides of the anti-deflection wheel (9), a sliding disk (11) slidably inserted in the inner cavity of the rotating cylinder (10), a spring (14) fixed at a position of the inner cavity of the rotating cylinder (10) away from the sliding disk (11), a support rod (13) inserted through the upper and lower ends of the sliding disk (11), and a connecting shaft (12) fixed at a position on the side of the sliding disk (11) away from the spring (14), one side of the connecting shaft (12) extends outside the adjacent rotating cylinder (10) and is fixed to the middle position of one side of the adjacent anti-deflection wheel (9), both sides of the support rod (13) are fixed to the inner wall of the adjacent rotating cylinder (10), and the middle position of the cross section of the anti-deflection wheel (9) is V-shaped.

7. The high pier steel strand bundle threading device and bundle threading method according to claim 6, characterized in that: The deviation correction assembly further comprises a movable shaft (15) fixed at a position on one side of the sliding disk (11) away from the connecting shaft (12), a connecting plate (16) fixed at a position outside the outlet (7) where the movable shaft (15) extends, a first tooth plate (17) fixed at one end of the connecting plate (16), a plurality of fixed blocks (18) fixed at both sides of the outer peripheral surface of the outlet (7), a rotating shaft (19) rotatably connected to a position between two adjacent fixed blocks (18), and a first tooth plate (17) fixedly sleeved on the rotating shaft. A circular gear (20) is provided on the outer peripheral surface of the rotating shaft (19), a second toothed plate (21) meshingly arranged at a position between two adjacent circular gears (20), and a movable plate (22) fixed at a position on one side of the second toothed plate (21); the movable plate (22) is slidably connected to the inner wall of the outlet (7); the movable shaft (15) is slidably connected to the rotating cylinder (10) and the inner wall of the outlet (7); and the circular gear (20) is meshedly connected to the first toothed plate (17) at the adjacent position.

8. The high pier steel strand bundle threading device and bundle threading method according to claim 7, characterized in that: The deviation-correcting assembly further comprises a connecting plate (23) fixed to the movable plate (22) and extending to the inside of the outlet (7), a mounting frame (24) arranged on one side of the movable plate (22), a contact wheel (27) rotatably connected to the inner surface of the mounting frame (24), a movable rod (26) fixedly sleeved on the outer peripheral surface of the contact wheel (27), two limiting rods (25) slidingly inserted through the surface of the connecting plate (23), and a telescopic rod (28) fixed at a middle position between the mounting frame (24) and the adjacent connecting plate (23), one side of the limiting rod (25) being fixed to the surface of the adjacent mounting frame (24).

Images