High-altitude butt joint device for secondary stress rod pieces in steel tube arch bridge

Abstract

The utility model discloses a high-altitude butt joint device for a secondary stress rod piece in a steel tube arch bridge. The high-altitude butt joint device comprises a jacking device, a positioning steel tube and a jacking rod. The positioning steel pipe is accommodated in the opposite ports of the butt-joint steel pipe and the butt-jointed steel pipe; the positioning steel pipe is in driving connection with the jacking device through a jacking rod; the side wall, facing the butted steel pipe, of the positioning steel pipe is provided with a conical wall. According to the device, the positioning steel pipe is inserted into the butt-joint steel pipe in advance (the outer diameter of the end of the positioning steel pipe is smaller than that of the butt-joint steel pipe through cutting, and the positioning steel pipe is conveniently inserted into the butt-joint steel pipe), the positioning steel pipe is jacked into the butt-joint steel pipe through the jacking device, and the positioning steel pipe plays a temporary positioning role, so that deformation in the welding process can be well limited; and meanwhile, as an inner liner for butt welding between a butt-joint steel pipe and a butt-joint steel pipe, the quality of a butt-joint steel pipe notch plug welding seam and a butt-joint penetration welding seam of the steel pipe obtained after welding is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of steel tube concrete arch bridges, and in particular to a high-altitude docking device for secondary load-bearing rods in steel tube arch bridges. Background Art

[0002] The large-span steel tube concrete arch bridge is a structural form with broad application prospects. This type of arch bridge has the advantages of light weight, high rigidity and strong durability.

[0003] The main load-bearing components of the existing steel tube concrete arch bridge are steel tubes, which have a large dead weight and are greatly affected by weight factors during transportation and hoisting. During the construction process, some structures need to complete the docking of the steel tube arch bridge arch ring or arch column segments at high altitudes.

[0004] The existing high-altitude docking method is: after positioning by flange, docking or direct intersecting welding is used to complete the docking connection of high-altitude docking components. After the flange is positioned, the docking structure is more complicated, and the docking operation is mainly completed manually, resulting in high construction costs. In addition, this docking method is generally used for the installation of the main load-bearing chord rods; while for the secondary load-bearing rods, direct intersecting welding is mainly used. When direct intersecting welding is used in a high-altitude environment, the quality of the weldment is difficult to guarantee, which seriously affects the safety of the weldment structure. The secondary load-bearing rods installed by the existing high-altitude docking method have a high risk of defects, which affects the safety of the load-bearing rods.

[0005] The existing docking method cannot meet the high-altitude docking safety requirements of steel tube arch bridges, especially the existing structure of the steel tube arch bridge arch ring, the arch column segment is the secondary rod of the docking components prone to failure, resulting in low stress reliability of the secondary rod of the steel tube arch bridge after construction.

[0006] For example, CN201910470199.7 discloses a semi-integral hoisting structure and docking method for the main arch rib of a basket-type steel tube arch bridge. This method uses single-width and single-width assembly of the left and right arch rib segments. After being transported to the lifting area below the cable crane by a beam transport trolley, two sets of temporary cross braces and hand winches are set between the left and right arch ribs to adjust the spacing between the chord tubes of the two arch ribs. While ensuring the stability of the arch rib segments during the hoisting process, the gap between the temporary cross brace and the chord tube and the length of the hand winch are adjusted to make the posture of the arch rib segments consistent with the theoretical state of the bridge, ensuring that the arch rib segments are accurately docked with the installed segments. The device has a simple structure, but the stress strength is low, and it cannot meet the high-altitude docking construction requirements of components with large deadweight such as steel pipes. Moreover, the device hoists components through a basket structure. When the component itself is large in size, it is also necessary to assemble a basket larger than the component to complete the hoisting and installation of the component, resulting in increased production costs.

[0007] Moreover, the above-mentioned existing device cannot provide a reliable welding support surface for the joint of the butt-jointed steel pipes during welding, which causes the solder to easily drip into the interior of the steel pipe during the welding process, affecting the weld and welding quality and reducing the welding reliability.

[0008] The information disclosed in the background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in the field. Utility Model Content

[0009] In view of the above technical problems, the present application provides a high-altitude docking device for secondary load-bearing rods in steel tube arch bridges. The method solves the problems of complex structure, high cost and poor welding quality of traditional docking methods. At the same time, the method can provide internal support for the weld, which is conducive to obtaining a better quality connection weld, thereby improving the docking accuracy of secondary load-bearing rods in steel tube arch bridges and improving the welding reliability of secondary load-bearing rods in steel tube arch bridges.

[0010] The present application provides a high-altitude docking device for secondary force-bearing rods in a steel tube arch bridge, comprising: a jacking device, a positioning steel tube, and a jacking rod; the positioning steel tube is accommodated in a port opposite to the docking steel tube and the docked steel tube; the positioning steel tube is connected to the jacking device by driving through the jacking rod; the positioning steel tube is provided with a cone wall toward the side wall of the docked steel tube;

[0011] During docking, the jacking device drives the positioning steel pipe to be inserted into the docked steel pipe;

[0012] During welding connection, the butt steel pipe and the positioning steel pipe are welded by means of the butt steel pipe notch plug welding weld; the butt steel pipe and the butted steel pipe are welded by means of the steel pipe butt penetration weld.

[0013] Preferably, the jacking device comprises: a jacking sleeve, a positive thread jacking screw, a negative thread jacking screw, and a torsion rod; the two ends of the jacking sleeve are respectively threadedly connected to the positive thread jacking screw and the negative thread jacking screw; the torsion rod is drivingly connected to the jacking sleeve.

[0014] Preferably, a screw notch is provided on the extended end surface of the positive thread jacking screw; and a screw notch is provided on the extended end surface of the negative thread jacking screw.

[0015] Preferably, it comprises: a jacking rear seat; the jacking rear seat is arranged on the outer wall of the butt steel pipe and abuts against one end of the jacking device; the other end of the jacking device abuts against the jacking rod.

[0016] Preferably, the extended end of the positive thread jacking screw abuts against the jacking rear seat; the extended end of the negative thread jacking screw abuts against the jacking rod.

[0017] Preferably, it comprises: a torsion rod limit block; the torsion rod limit blocks are arranged on both ends of the torsion rod.

[0018] Preferably, it comprises: sleeve openings arranged in pairs; the sleeve openings are symmetrically opened on the jacking sleeve; and the torsion rod is passed through the sleeve openings.

[0019] Preferably, it comprises: a butt-jointed steel pipe notch; the butt-jointed steel pipe notch is opened on the butt-jointed operation side wall of the butt-jointed steel pipe; and a butt-jointed steel pipe notch plug welding seam is arranged in the butt-jointed steel pipe notch.

[0020] Preferably, it comprises: positioning steel pipe openings arranged in pairs; the positioning steel pipe openings are symmetrically arranged on the positioning steel pipe and aligned with the butt steel pipe notches; the jacking rod is inserted into the positioning steel pipe openings and welded to the positioning steel pipe.

[0021] The beneficial effects of this application include:

[0022] 1) The high-altitude butt joint device for secondary load-bearing members in a steel tube arch bridge provided in the present application, which inserts a positioning steel tube into the butt joint steel tube in advance (cutting makes the outer diameter of the end of the positioning steel tube smaller than that of the butt joint steel tube to facilitate the insertion of the positioning steel tube into the butt joint steel tube), and pushes the positioning steel tube into the butt joint steel tube through a jacking device. The positioning steel tube plays a temporary positioning role, which can well limit the deformation during the welding process, and at the same time serves as an inner liner for butt welding between the butt joint steel tube and the butt joint steel tube, effectively improving the quality of the butt joint steel tube notch plug weld and the steel tube butt penetration weld obtained after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A plan view of the steel pipe segments to be butted together for at least one embodiment provided in the present application.

[0024] Figure 2 for Figure 1 A partial enlarged view of the steel pipe butt joint.

[0025] Figure 3 This is a vertical view of the steel pipe high-altitude docking device in at least one embodiment provided in the present application, showing the positioning steel pipe in a state where it has not been pushed in.

[0026] Figure 4 This is a vertical view of a steel pipe high-altitude docking device in at least one embodiment provided in the present application, showing the positioning steel pipe in the state of completing the jacking.

[0027] Figure 5 A vertical view of the steel pipe high-altitude docking device in at least one embodiment provided in the present application, showing the state of the jacking rod being cut off and the jacking rear seat.

[0028] Figure 6 This is a vertical view of a steel pipe high-altitude docking device in at least one embodiment provided in the present application, showing the completed docking state.

[0029] Figure 7 A cross-sectional view of a positioning steel pipe and a jacking rod in at least one embodiment provided in the present application.

[0030] Figure 8 A cross-sectional view of a butt-jointed steel pipe in at least one embodiment provided in the present application.

[0031] Fig. 9 A top view of the jacking device, jacking rod, and jacking rear seat in at least one embodiment provided in the present application.

[0032] Fig.10 A schematic front view of a jacking device in at least one embodiment provided in the present application.

[0033] Fig.11 A cross-sectional view of the connection state of the jacking sleeve and the torsion rod in at least one embodiment provided in the present application.

[0034] Fig.12 A cross-sectional view of the pushing screw in at least one embodiment provided in the present application.

[0035] Legend:

[0036] Butt-jointed steel pipe 11, butted steel pipe 12, jacking device 20, jacking sleeve 21, positive thread jacking screw 22, reverse thread jacking screw 23, torsion rod 24, torsion rod limit block 25, screw notch 26, sleeve hole 27, jacking back seat 31, butt-jointed steel pipe notch 32, positioning steel pipe 33, jacking rod 34, positioning steel pipe hole 35, butt-jointed steel pipe notch plug weld 36, steel pipe butt penetration weld 37. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0039] The technical means that are not described in detail in this application and are not used to solve the technical problems of this application are all set according to the common knowledge in the field, and can be implemented in a variety of common knowledge settings.

[0040] See also Figures 1 to 12 The high-altitude docking device for secondary force-bearing rods in a steel tube arch bridge provided by the present application comprises: a sleeve hole 27 is opened on a jacking sleeve 21, a torsion rod 24 is inserted into the jacking sleeve 21 from the sleeve hole 27, and torsion rod limit blocks 25 are respectively welded to both ends of the torsion rod 24, and the torsion rod 24 rotates and moves up and down in the sleeve hole 27. By driving the torsion rod 24 to rotate, the jacking sleeve 21 can be driven to rotate, thereby driving the positive thread jacking screw 22 and the reverse thread jacking screw 23 to extend or retract.

[0041] After screw notches 26 are opened at the ends of the positive thread jacking screw 22 and the reverse thread jacking screw 23, the other ends of the positive thread jacking screw 22 and the reverse thread jacking screw 23 are screwed into the two opposite open ends of the sleeve 21 to assemble the jacking device 20.

[0042] A butt joint steel pipe notch 32 is opened on one side wall of the butt joint steel pipe 11, and a positioning steel pipe hole 35 is opened on the positioning steel pipe 33. The positioning steel pipe 33 is inserted into the port to be butted of the butt joint steel pipe 11, and the positioning steel pipe hole 35 is aligned with the butt joint steel pipe notch 32. After the jacking rod 34 is inserted into the positioning steel pipe hole 35 through the butt joint steel pipe notch 32, the jacking rod 34 and the positioning steel pipe 33 are welded around the exposed hole. The jacking rod 34 is extended out of the butt joint steel pipe 11, and a jacking rear seat 31 is welded on the easy-to-operate side outside the butt joint steel pipe 11. The screw notch 26 on the end face of the positive thread jacking screw 22 at one end of the assembled jacking device 20 is abutted against the jacking rear seat 31, and the screw notch 26 on the end face of the reverse thread jacking screw 23 threadedly connected on the other end of the jacking device 20 is abutted against the jacking rear seat 31. A conical surface is provided on the outer side wall of one end of the positioning steel pipe 33 facing the butted steel pipe 12, so as to facilitate the positioning steel pipe 33 to be inserted into the butted steel pipe 12 during positioning connection.

[0043] During operation, the torsion rod 24 is twisted to drive the jacking sleeve 21 to rotate. When the jacking sleeve 21 rotates, the positive thread jacking screw 22 and the reverse thread jacking screw 23 rotate outward and extend respectively, and the positioning steel pipe 33 is pushed to extend toward the butt-jointed steel pipe 12 through the jacking rod 34. After the positioning steel pipe 33 is pushed into the butt-jointed steel pipe 12, the jacking device 20 is removed, the jacking rear seat 31 is removed, and the protruding part of the jacking rod 34 is cut until the jacking rod 34 is flush with the side wall of the butt-jointed steel pipe 11. Then, the butt-jointed steel pipe notch plug welding seam 36 is welded in the butt-jointed steel pipe notch 32 on the butt-jointed steel pipe 11, and the butt-jointed steel pipe notch plug welding seam 36 is set on the outer side wall of the positioning steel pipe 33. The butt joint of the butt-jointed steel pipe 11 and the butt-jointed steel pipe 12 is welded to obtain the steel pipe butt penetration weld 37.

[0044] This structure can use the positioning steel pipe 33 to achieve guidance during butt jointing, and at the same time use the positioning steel pipe 33 as the bearing surface of the weld to provide a reliable support surface for the welding operation, thereby effectively improving the quality of the butt joint steel pipe notch plug weld 36 and the steel pipe butt joint penetration weld 37, thereby improving the reliability of high-altitude butt jointing of secondary load-bearing rods in steel pipe arch bridges and welding reliability.

[0045] See also Figures 3 to 12 The construction method of the above device comprises the following steps:

[0046] Step F1: Assemble and form the jacking device 20: Open a sleeve hole 27 in the jacking sleeve 21, insert the torsion rod 24 from the sleeve hole 27, and weld the torsion rod stopper 25 on both ends of the torsion rod 24. The torsion rod 24 rotates and moves up and down in the sleeve hole 27. Fig.11 The positive thread jacking screw 22, the reverse thread jacking screw 23 end screw notch 26 after screwing into the sleeve 21, assembled to form a jacking device 20, such as Fig.10 shown.

[0047] Step F2: Assembly before jacking: Open a butt steel pipe notch 32 on the butt steel pipe 11, open a positioning steel pipe hole 35 on the positioning steel pipe 33, insert the positioning steel pipe 33 into the butt steel pipe 11, and align the positioning steel pipe hole 35 with the butt steel pipe notch 32, insert the jacking rod 34 into the positioning steel pipe hole 35 and weld around the hole, weld the jacking back seat 31 on the top of the butt steel pipe 11, and place the assembled jacking device 20 between the jacking back seat 31 and the jacking rod 34, as shown in FIG. Figure 3 shown.

[0048] Step F3: Pushing the positioning steel pipe 33: Using the torsion rod 24 to twist the pushing sleeve 21, the positioning steel pipe 33 is pushed into the butted steel pipe 12. Figure 4 shown.

[0049] Step F4: Preparation work before butt jointing of steel pipes. Remove the jacking device 20, dismantle the jacking rear seat 31, and cut off the portion of the jacking rod 34 extending out of the butt joint steel pipe 11. Figure 5 shown.

[0050] Step F5: Complete the steel pipe butt joint. Weld the steel pipe butt joint penetration weld 37 at the joint of the butt joint steel pipe 11 and the butted steel pipe 12, and weld the butt joint steel pipe notch plug weld 36 on the butt joint steel pipe notch 32. Figure 6 shown.

[0051] By inserting the positioning steel pipe 33 in advance into the butt-joined steel pipe 11, the positioning steel pipe 33 with a small outer diameter at the end is used to facilitate insertion into the butt-joined steel pipe 11, and the positioning steel pipe 33 is pushed into the butt-joined steel pipe 12 by the jacking device 22. The positioning steel pipe 33 plays a temporary positioning role, which can well limit the deformation during the welding process, and at the same time, it serves as a liner for the butt welding between the butt-joined steel pipe 11 and the butt-joined steel pipe 12, effectively improving the welding quality of the butt-joined steel pipe notch plug welding weld 36 and the steel pipe butt penetration weld 37. This method can realize the high-altitude butt joint of the secondary load-bearing rods in the steel pipe arch bridge, and the weld quality after butt joint is good.

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-altitude docking device for secondary load-bearing rods in a steel tube arch bridge, characterized in that: include: A jacking device (20), a positioning steel pipe (33), and a jacking rod (34); the positioning steel pipe (33) is accommodated in ports of the butt-jointed steel pipe (11) and the butt-jointed steel pipe (12) opposite to each other; the positioning steel pipe (33) and the jacking device (20) are connected by driving via the jacking rod (34); a conical wall is provided on the side wall of the positioning steel pipe (33) facing the butt-jointed steel pipe (12); During docking, the jacking device (20) drives the positioning steel pipe (33) to be inserted into the docked steel pipe (12); During welding connection, the butt-jointed steel pipe (11) and the positioning steel pipe (33) are welded via the butt-jointed steel pipe notch plug welding weld (36); and the butt-jointed steel pipe (11) and the butt-jointed steel pipe (12) are welded via the steel pipe butt penetration weld (37).

2. The high-altitude docking device for secondary load-bearing rods in a steel tube arch bridge according to claim 1 is characterized in that: The jacking device (20) comprises: a jacking sleeve (21), a positive thread jacking screw (22), a negative thread jacking screw (23), and a torsion rod (24); the two ends of the jacking sleeve (21) are respectively threadedly connected to the positive thread jacking screw (22) and the negative thread jacking screw (23); and the torsion rod (24) is drivingly connected to the jacking sleeve (21).

3. The high-altitude docking device for secondary load-bearing rods in a steel tube arch bridge according to claim 2 is characterized in that: A screw notch (26) is provided on the extended end surface of the positive thread jacking screw (22); and a screw notch (26) is provided on the extended end surface of the negative thread jacking screw (23).

4. The high-altitude docking device for secondary load-bearing rods in a steel tube arch bridge according to claim 1 is characterized in that: include: The jacking rear seat (31) is arranged on the outer wall of the butt-jointed steel pipe (11) and abuts against one end of the jacking device (20); the other end of the jacking device (20) abuts against the jacking rod (34).

5. The high-altitude docking device for secondary load-bearing rods in a steel tube arch bridge according to claim 2 is characterized in that: The extended end of the positive thread jacking screw (22) abuts against the jacking rear seat (31); the extended end of the negative thread jacking screw (23) abuts against the jacking rod (34).

6. The high-altitude docking device for secondary load-bearing rods in a steel tube arch bridge according to claim 2, characterized in that: include: Torsion rod limit blocks (25); the torsion rod limit blocks (25) are arranged on both ends of the torsion rod (24).

7. The high-altitude docking device for secondary load-bearing rods in a steel tube arch bridge according to claim 2, characterized in that: include: The sleeve openings (27) are arranged in pairs; the sleeve openings (27) are symmetrically opened on the jacking sleeve (21); and the torsion rod (24) is inserted into the sleeve openings (27).

8. The high-altitude docking device for secondary load-bearing rods in a steel tube arch bridge according to claim 1 is characterized in that: include: The butt-jointed steel pipe notch (32) is provided on the butt-jointed operation side wall of the butt-jointed steel pipe (11); and the butt-jointed steel pipe notch plug welding weld (36) is arranged in the butt-jointed steel pipe notch (32).

9. The high-altitude docking device for secondary load-bearing rods in a steel tube arch bridge according to claim 5, characterized in that: include: The positioning steel pipe openings (35) are arranged in pairs; the positioning steel pipe openings (35) are symmetrically arranged on the positioning steel pipe (33) and aligned with the butt steel pipe notch (32); the jacking rod (34) is inserted into the positioning steel pipe openings (35) and welded to the positioning steel pipe (33).

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