A tension tie hook device and its usage method for the installation and closure of steel crossbeams

Abstract

The present invention relates to the technical field of steel structure construction, and discloses an opposite-pulling hook device and a usage method for the installation and closure of steel crossbeams, including crossbeam hooks arranged at both ends of the closure section, an opposite-pulling device arranged on the already-installed section, a tensioning device arranged on the opposite-pulling device, and an adjustment device arranged between the crossbeam hook and the already-installed section. The present invention has the following advantages and effects: 1. By arranging crossbeam hooks on the closure section, the hoisting equipment can be unhooked and put into other hoisting operations after the hanging beam hook is stable, improving the utilization rate of large equipment. 2. The use of the opposite-pulling device composed of a distribution beam and a reaction seat makes it convenient to adjust the distance of the closure opening, and the width of the bottom of the groove of the plate parts on both sides of the butt weld can also be controlled, which is beneficial to ensuring the welding quality of the butt weld. 3. The adjustment device is paired with the crossbeam hook, which can accurately adjust the closure section in multiple directions, ensure the accuracy and smoothness of the closure process, and does not occupy the hoisting equipment, and the safety is also improved.

Description

Technical Field

[0001] This application relates to the technical field of steel structure construction, and particularly relates to an opposite-pulling hook device for the installation and closure of steel crossbeams and its usage method. Background Art

[0002] Currently, in the field of bridge engineering during engineering construction, the shapes of cable-stayed bridge or suspension bridge pylons are becoming increasingly rich. In some light bridges, the crossbeams of the pylons usually adopt the structure of steel crossbeams. During the installation of most circular, oval or outwardly inclined cable-stayed bridge crossbeams, due to the shapes and weights of the left and right supporting pylons themselves, horizontal components of force towards the outside of the tower will be generated at the crossbeam of the tower column, resulting in an increase in the distance between the closure joints of the crossbeam. When hoisting the crossbeam, it is not easy to align the positions, and the distance between the docking interfaces is unstable, and it is also difficult to ensure the welding quality of the butt welds. In the conventional construction method, from the hoisting to the adjustment until all butt welds are finally welded and inspected qualified, the hoisting machinery must remain in the hoisting state throughout the process, which reduces the turnover rate of large-scale machinery on site, and the precision control is not good, which is not conducive to controlling the construction quality cost, and the safety risk is also relatively high. Summary of the Invention

[0003] Aiming at the defects existing in the prior art, the purpose of this application is to provide an opposite-pulling hook device for the installation and closure of steel crossbeams and its usage method, so as to reduce the working time of large-scale machinery, improve the turnover rate of large-scale machinery and improve the docking precision.

[0004] To achieve the above purpose, on the one hand, the technical solution adopted is: an opposite-pulling hook device for the installation and closure of steel crossbeams, the steel crossbeam is divided into two fixed installed segments and a movable closure segment according to the installation state, including:

[0005] Crossbeam hooks, which are installed at both ends of the closure segment, at least two at each end, located on both sides of the end face, and the crossbeam hooks extend out of the closure segment along the length direction of the closure segment;

[0006] Opposite-pulling devices, the number of which is two, are respectively installed on the two installed segments, and the two opposite-pulling devices are connected to each other by steel strands;

[0007] Tensioning devices, which are arranged at both ends of the steel strands to tighten the steel strands;

[0008] Adjusting devices, which include several three-way jacks, and at least one three-way jack is arranged between each crossbeam hook and the installed segment.

[0009] Preferably, the adjusting device further includes several cushion blocks, and several cushion blocks are arranged between each crossbeam hook and the installed segment, and the cushion blocks are stacked vertically.

[0010] Preferably, corbels are arranged on the side walls of the installed segments, and the three-way jacks and / or the cushion blocks are partially installed on the corbels.

[0011] Preferably, the tensioning device includes:

[0012] Reaction seats symmetrically arranged on both sides of each installed section;

[0013] Distribution beams, whose length directions are perpendicular to the length direction of the installed section;

[0014] One side of the distribution beam and the reaction seat away from the closure segment abuts against each other.

[0015] Preferably, a number of tensioning holes are provided on the distribution beam, and the steel strands pass through the tensioning holes and are fixedly connected to the distribution beam.

[0016] Preferably, the tensioning device includes a number of tensioning jacks. The tensioning jacks are arranged on one side of the tensioning holes away from the closure segment, and the steel strands are connected to the tensioning jacks through the tensioning holes.

[0017] On the other hand, the usage method of the aforementioned tensioning hook device is as follows:

[0018] S1. Select a suitable closure segment to ensure that the closure segment and the installed segments can be spliced with each other, and hoist the closure segment to the closure position with a crane;

[0019] S2. Weld crossbeam hooks symmetrically at the top ends of the end faces at both ends of the closure segment;

[0020] S3. Install three-way jacks under the crossbeam hooks. After the adjustment device is installed, lower the crane to confirm that the crossbeam hooks are stable, and then remove the crane;

[0021] S4. Install the tensioning device. Install one tensioning device on each installed segment, connect the two tensioning devices with steel strands, and connect both ends of the steel strands to the tensioning device;

[0022] S5. Use the three-way jack to adjust the orientation of the closure segment so that the closure segment and the installed segments are completely aligned, and then use the tensioning device to tighten the steel strands so that the gap between the closure segment and the installed segments meets the welding requirements;

[0023] S6. Weld the gap between the closure segment and the installed segments. After the weld is inspected and qualified, cut off all the reaction seats and crossbeam hooks, remove the adjustment device and the tensioning device, and complete the closure of the steel crossbeam. Preferably, between steps S2 - S3, the following steps are also carried out:

[0024] S2.1. After the closure segment is hoisted into the closure position by the crane, stack a number of cushion blocks under the crossbeam hooks. The stacked height of the cushion blocks makes the top surface height of the closure segment lower than the top surface of the installed segment, and makes the height from the top surface of the installed segment to the bottom surface of the crossbeam hook such that a three-way jack in a stored state can be placed.

[0025] Preferably, in step S4, the specific steps of installing the pulling device are:

[0026] S4.1 Select the lifting lugs of the installed section as reaction blocks or weld reaction blocks symmetrically on both sides of the installed section;

[0027] S4.2 Install the distribution beam on the side of the reaction seat away from the closure section, and install the tensioning device on the distribution beam;

[0028] S4.3 The two distribution beams are connected by steel strands, and both ends of the steel strands are connected to the tensioning device.

[0029] Preferably, in step S5, after using the three-way jack to adjust the direction of the closure section, the following steps are added:

[0030] S5.1 Install several spacers so that they are stacked up and abut against the crossbeam hooks;

[0031] S5.2 Weld the crossbeam hooks and pads, pads and installed sections, and pads and pads firmly.

[0032] The beneficial effects of the technical solution provided by this application include:

[0033] 1. By setting crossbeam hooks on the closure section, the hoisting equipment can be unhooked and put into other lifting operations after the suspension beam hooks are stable, thereby improving the utilization rate of large equipment, speeding up construction and effectively reducing construction costs.

[0034] 2. The use of the pulling device composed of the distribution beam and the reaction seat makes it easy to adjust the distance of the joint mouth, and the width of the bottom of the groove of the plates on both sides of the butt weld can also be controlled, which is conducive to ensuring the welding quality of the butt weld.

[0035] 3. The adjustment device is combined with the crossbeam hook to make multi-directional precise adjustments to the joint section, ensuring that the joint process is accurate and smooth without occupying any lifting equipment, and thus improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] Figure 1 This is a main view of an embodiment of the present application.

[0038] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0039] Figure 3 The Figure 1 top view of the illustrated embodiment.

[0040] Figure 4 The Figure 3 enlarged view at position B in

[0041] Figure 5 The Figure 1 structural schematic diagram of the contact surface between the closure segment and the installed segment, facing the closure segment side in

[0042] Figure 6 The Figure 1 structural schematic diagram of the contact surface between the closure segment and the installed segment, facing the installed segment side in

[0043] Reference numerals:

[0044] 1, installed segment; 2, closure segment; 3, crossbeam hook; 4, tie-back device; 41, steel strand; 42, reaction seat; 43, distribution beam; 431, tensioning hole; 5, tensioning device; 51, tensioning jack; 6, adjustment device; 61, three-way jack; 62, cushion block; 63, bracket. Detailed implementation manners

[0045] In order to make the purpose, technical solutions and advantages of the present application clearer, the following further elaborates on the present invention in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] In this embodiment, as shown in Figure 1 , the illustrated steel crossbeam is divided into an installed segment 1 that has been fixedly installed and a closure segment 2 that still needs to be installed. Crossbeam hooks 3 are provided at both ends of the closure segment 2, at least two at each end, located on both sides of the end face and extending forward from the closure segment 2 to facilitate hanging the closure segment 2 on the installed segment 1. A tie-back device 4 is provided on the installed segment 1, and the tie-back device 4 is connected to each other using steel strands 41. A tensioning device 5 is used to tighten the steel strands 41 on the steel strands 41. There are many forms of the tensioning device 5, such as wire reels, jacks, etc. After the closure segment 2 is hoisted to the middle of the installed segment 1 and the crossbeam hooks 3 are installed, an adjustment device 6 is provided between the crossbeam hook 3 and the installed segment 1. The adjustment device 6 is a three-way jack 61, and its top abuts against the crossbeam hook 3 for adjustment.

[0047] As an optimization of this embodiment, as shown in Figure 1 , 2As shown in FIGS. 5, the adjusting device 6 further includes a plurality of cushion blocks 62 disposed between the crossbeam hook 3 and the installed section 1. There are several cushion blocks 62, which play a major role in supporting the closure segment 2, reducing the load on the three-way jack 61, and extending the service life of the three-way jack 61.

[0048] Further, a bracket 63 is provided on the side wall of the installed section 1, and the three-way jack 61 and / or part of the cushion blocks 62 are installed on the bracket 63. On the one hand, the force is dispersed, reducing the damage to the installed section 1, and it is also convenient for the fine adjustment and observation of the closure segment 2.

[0049] As an optimization of this embodiment, the tensioning device 4 includes a reaction seat 42 and a distribution beam 43. The distribution beam 43 and the reaction seat 42 are abutted against each other on the side away from the closure segment 2. The reaction seat 42 can use the lifting lug during the hoisting of the installed section 1 as the reaction seat 42 or weld the reaction seat 42.

[0050] Further, a plurality of tensioning holes 431 are provided on the distribution beam 43, and the steel strand 41 passes through the tensioning holes 431 and is fixedly connected to the distribution beam 43.

[0051] Furthermore, the tensioning device 5 includes a plurality of tensioning jacks 51. The tensioning jacks 51 are disposed on the side of the two distribution beams 43 away from the closure segment 2. In this embodiment, one end of the tensioning jack 51 is fixedly connected to the steel strand 41, and the other end abuts against the surface of the distribution beam 43, and the steel strand 41 is tightened by means of the support of the distribution beam 43.

[0052] The usage method of the aforementioned tensioning hook device for the installation and closure of the steel crossbeam is carried out according to the following steps:

[0053] S1 Select a suitable closure segment 2 and use a crane to lift the closure segment 2 to the closure position;

[0054] S2 Weld the crossbeam hooks 3 at both ends of the closure segment 2. In this embodiment, two are welded at each end, located at the top on both sides of the end face of the closure segment 2. A single crossbeam hook 3 is assembled and welded with a shaped steel plate;

[0055] S3 Install the three-way jack 61, slowly adjust until the three-way jack 61 abuts against the crossbeam hook 3 and apply a certain jacking force to prevent damage to the jack caused by the instability of the closure segment 2. Then slowly release the hook of the crane. After the hook is released and it is confirmed that the crossbeam hook 3 is stable, the crane completely disengages the hook;

[0056] S4 Install the tensioning device 4, install one tensioning device 4 on each installed section 1, connect the two tensioning devices 4 with a steel strand 41, and both ends of the steel strand 41 are connected to the tensioning device 5;

[0057] S5. Use the three-way jack 61 to adjust the orientation of the closure segment 2 so that the orientation of the closure segment 2 is aligned with the installed segment 1. Then use the tensioning device 5 to tension the steel strand 41. During the tensioning process, do not apply excessive pressure at one time.

[0058] In some embodiments, between steps S2 - S3, the following steps are also carried out: When lowering the closure segment 2, place a number of cushion blocks 62 between the crossbeam hook 3 and the installed segment 1. The height of the cushion blocks 62 ensures that when the crossbeam is suspended, its top surface is slightly lower than the top surfaces of the two ends of the installed segment 1, and the distance between the bottom of the crossbeam hook 3 and the top surface of the interface allows the three-way jack 61 to be freely placed.

[0059] In some embodiments, in step S4, the specific steps for installing the tensioning device 4 are

[0060] S4.1 Select the lifting lug of the installed segment 1 as the reaction seat 42 or symmetrically weld the reaction seats 42 on both sides of the installed segment 1. In this embodiment, a set of shaped steel plates assembled and used as the segment lifting lug is selected.

[0061] S4.2 Install and erect the distribution beam 43 on the side of the reaction seat 42 away from the closure segment 2, and install the tensioning device 5 on the distribution beam 43. The distribution beam 43 is assembled by welding double-channel steel and shaped steel plates.

[0062] S4.3 Connect the two distribution beams 43 with the steel strand 41. The middle of the distribution beam 43 is provided with a tensioning hole 431 for the steel strand 41 to pass through, and both ends of the steel strand 41 are connected to the tensioning device 5.

[0063] In some embodiments, in step S5, after using the three-way jack 61 to adjust the orientation of the closure segment 2, the following steps are added:

[0064] S5.1 Add a number of cushion blocks 62 so that after the cushion blocks 62 are stacked up, they abut against the crossbeam hook 3.

[0065] S5.2 Weld the crossbeam hook 3 and the cushion blocks 62, the cushion blocks 62 and the installed segment 1, and the cushion blocks 62 and the cushion blocks 62 firmly.

[0066] This application is not limited to the above embodiments. For those of ordinary skill in the art of this technology, without departing from the principle of this invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as within the protection scope of this invention.

Claims

1. A method for using a tension hook device for installing and closure of a steel beam, wherein the steel beam is divided into two fixed installed sections (1) and a movable closure section (2) according to the installation state, and the tension hook device comprises: Crossbeam hooks (3) are installed at both ends of the joint section (2), with at least two hooks at each end, located on both sides of the end surface, and the crossbeam hooks (3) extend out of the joint section (2) along the length direction of the joint section (2); There are two tensioning devices (4), which are respectively installed on the two installed sections (1). The two tensioning devices (4) are connected to each other by using a steel strand (41). The tensioning devices (4) also include: Reaction seats (42) symmetrically arranged on both sides of each installed segment (1); A distribution beam (43) whose length direction is perpendicular to the length direction of the installed segment (1); The distribution beam (43) and the reaction seat (42) abut against each other on the side away from the joint section (2); a tensioning device (5) is provided at both ends of the steel strand (41) to tighten the steel strand (41); An adjusting device (6) comprising a plurality of three-way jacks (61), wherein at least one three-way jack (61) is provided between each of the beam hooks (3) and the installed segment (1); The method for using the tension hook device for installing and closing a steel beam comprises: S1 selects a suitable joint section (2), ensures that the joint section (2) and the assembled section (1) can be spliced together, and hoists the joint section (2) to the joint position using a crane; S2 symmetrically welds beam hooks (3) at the top of the end faces of both ends of the joint section (2); S3 installs a three-way jack (61) under the beam hook (3). After the adjustment device (6) is installed, the crane is lowered to confirm that the beam hook (3) is stable, and then the crane is removed; S4 installs a tensioning device (4), wherein one tensioning device (4) is installed on each installed segment (1), and the two tensioning devices (4) are connected by a steel strand (41), and both ends of the steel strand (41) are connected to the tensioning device (5); S5 uses a three-way jack (61) to adjust the orientation of the joint section (2) so that the joint section (2) and the installed section (1) are completely aligned, and then uses a tensioning device (5) to tighten the steel strand (41) so that the gap between the joint section (2) and the installed section (1) meets the welding requirements; S6 welds the gap between the joint section (2) and the installed section (1). After checking that the weld is qualified, all reaction seats (42) and beam hooks (3) are cut off, and the adjustment device (6) and the tensioning device (4) are removed to complete the jointing of the steel beam.

2. The method of use according to claim 1, wherein: The adjustment device (6) further comprises a plurality of pads (62), wherein a plurality of pads (62) are provided between each crossbeam hook (3) and the installed section (1), and the pads (62) are stacked vertically.

3. The method of use according to claim 2, wherein: A corbel (63) is provided on the side wall of the installed section (1), and the three-way jack (61) and / or the pad (62) are partially installed on the corbel (63).

4. The method of use according to claim 1, wherein: The distribution beam (43) is provided with a plurality of tensioning holes (431), and the steel strands (41) pass through the tensioning holes (431) and are fixedly connected to the distribution beam (43).

5. The method of use according to claim 4, characterized in that: The tensioning device (5) comprises a plurality of tensioning jacks (51), wherein the tensioning jacks (51) are arranged on a side of the tensioning hole (431) away from the joint section (2), and the steel strands (41) are connected to each other through the tensioning hole (431) and the tensioning jacks (51).

6. The method of use according to claim 1, characterized in that: Between steps S2 and S3, the following steps are also performed: S2.1 After the joint section (2) is hoisted into the joint position by the crane, a number of pads (62) are stacked under the crossbeam hook (3). The height of the pads (62) is such that the top surface of the joint section (2) is lower than the top surface of the installed section (1), and the height from the top surface of the installed section (1) to the bottom surface of the crossbeam hook (3) is such that a three-way jack (61) in the storage state can be placed.

7. The method of use according to claim 1, characterized in that: In step S4, the specific steps of installing the pulling device (4) are: S4.1 Select the lifting lugs of the installed section (1) as the reaction seats (42) or weld the reaction seats (42) symmetrically on both sides of the installed section (1); S4.2 Installing a distribution beam (43) on the side of the reaction seat (42) away from the joint section (2), and installing a tensioning device (5) on the distribution beam (43); S4.3 The two distribution beams (43) are connected by a steel strand (41), and both ends of the steel strand (41) are connected to the tensioning device (5).

8. The method of use according to claim 1, characterized in that: In step S5, after using the three-way jack (61) to adjust the direction of the joint section (2), the following steps are added: S5.1 Install a plurality of spacers (62) so that the spacers (62) are stacked up and abut against the crossbeam hook (3); S5.2 The crossbeam hook (3) and the pad (62), the pad (62) and the installed section (1), and the pad (62) and the pad (62) are all welded firmly.

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