Bridge fabrication machine rear anchor lifting lug device suitable for steel beam lifting

Abstract

The utility model provides a rear anchor lifting lug device of a deck crane used in the process of lifting a steel box girder, the bottom of a finish rolling deformed steel bar lifting rod is fixedly connected with a carrying pole beam, the carrying pole beam is formed by welding double-spliced channel steel, gaskets are welded on the top surface and the bottom surface of the carrying pole beam, through holes for the finish rolling deformed steel bar lifting rod to pass through are reserved on the gaskets, and the through holes are communicated with the through holes. The bottom of the finish rolling deformed steel bar suspender penetrates through the carrying pole beam from the gasket, and a nut is arranged at the bottom of the carrying pole beam to fix the finish rolling deformed steel bar suspender; a first lifting lug is downwards mounted in the center of the bottom of the carrying pole beam, a second lifting lug is upwards mounted in the corresponding position of the steel box beam, and the second lifting lug is connected with the first lifting lug through a pin shaft; the two ends of the carrying pole beam are downwards welded with double-spliced I-shaped steel, and the bottoms of the double-spliced I-shaped steel are welded and fixed to the steel box beam. The device is quickly connected with the lifting lug, so that the construction time is greatly saved, and the construction safety risk is reduced to a great extent.

Description

Technical Field

[0001] The utility model relates to the technical field of steel box girder hoisting, in particular to a rear anchor lifting lug device of a bridge-building machine used for steel girder hoisting. Background Art

[0002] With the rapid development of high-speed railway construction, the proportion of long-span bridges in high-speed railway construction is increasing. In the selection of beam construction, the option of steel box beams has gradually been recognized by various construction units. Compared with concrete beams, steel box beam structures have the characteristics of light weight, long span capacity, high seismic resistance, and short construction time. During the lifting process, the front end of the bridge crane is subjected to large forces, so in order to balance the forces, it is particularly important to connect the rear end of the bridge crane with the rear anchor of the steel box beam.

[0003] The traditional method of lifting steel box girders is to embed the rear anchor holes at the end of the concrete beam. The construction process is complicated, the construction must be done inside the top plate of the concrete box chamber, the operation is inconvenient, and there are safety hazards for workers. Therefore, it is urgent to invent a device that can safely and quickly install the bridge crane and the rear anchor of the steel box girder, ensure the force balance of the bridge crane, and make it more stable and safe during the lifting of the steel box girder. Utility Model Content

[0004] In order to solve the shortcomings of the prior art that the rear anchor installation procedure of the bridge crane is cumbersome and difficult, and there are safety risks when installing the rear anchor nut, the utility model provides a rear anchor lifting lug device for the bridge crane during the lifting of the steel box girder. The device is quickly connected with the lifting lug, and the installation greatly saves construction time and greatly reduces the safety risk of construction. During the lifting process, the hoisting device is ensured to be balanced, the lifting of the steel box girder is more stable and safe, the operation is simple and controllable, and the labor cost and time are greatly saved, and the safety is greatly improved.

[0005] The technical solution adopted to achieve the above-mentioned purpose of the utility model is:

[0006] A rear anchor lifting lug device for a bridge-building machine suitable for steel beam lifting, comprising at least a finely rolled threaded steel hanger rod, the bottom of which is connected and fixed with a shoulder pole beam, the shoulder pole beam being welded from double-jointed channel steels, gaskets being welded on the top and bottom of the shoulder pole beam, a through hole for the finely rolled threaded steel hanger rod to pass through being reserved on the gasket, the top of the finely rolled threaded steel hanger rod being connected and fixed with a bridge deck crane, the bottom of the finely rolled threaded steel hanger rod passing through the shoulder pole beam from the gasket, and a nut being arranged at the bottom of the shoulder pole beam to fix the finely rolled threaded steel hanger rod;

[0007] A first lifting lug is installed downward at the center of the bottom of the shoulder beam, and a second lifting lug is installed upward at a corresponding position on the steel box beam, and the second lifting lug is connected to the first lifting lug through a pin shaft;

[0008] Both ends of the shoulder pole beam are welded downward with double I-beams, and the bottom of the double I-beams are welded and fixed to the steel box beam to prevent the shoulder pole beam from shaking back and forth due to unbalanced force during lifting.

[0009] Furthermore, the first lifting ear clamps the second lifting ear therein, and the positions of the pin ear holes of the two lifting ears correspond to each other.

[0010] Furthermore, triangular reinforcing plates are welded to reinforce the welding sides of the bottom of the double-jointed I-beam and the steel box girder.

[0011] Furthermore, stiffening ribs are evenly welded and arranged on the sides of the double-jointed I-beam to enhance its tensile resistance.

[0012] Furthermore, trapezoidal steel plates are vertically welded on both the front and rear surfaces of the second lifting eye, and the bottom edge of the trapezoidal steel plate is welded to the steel box girder.

[0013] Compared with the prior art, the rear anchor lug device of the bridge crane used in the process of lifting the steel box girder provided by the utility model has the following advantages:

[0014] 1. The top surface of the steel box girder is equipped with lifting lugs, which provides ample operating space, facilitates installation and has relatively high safety.

[0015] 2. There is a pin hole in the middle of the double lifting ears welded to the bottom of the lifting ears and the shoulder pole beam for quick and easy connection.

[0016] 3. The reinforcement measures of double I-beams are set at both ends of the shoulder pole beam, which not only balances the force on the shoulder pole beam, but also adds two force points with higher stability, safety and reliability.

[0017] 4. The shoulder beam and the rear anchor system of the bridge crane are connected by precision-rolled threaded steel bars, and the bottom and top are installed and fixed with pads and nuts, which is easy to operate, safe and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the overall structure of the rear anchor lifting lug of the bridge-building machine suitable for steel beam lifting in the utility model;

[0019] Figure 2 It is a front view of the second lifting lug on the steel box girder in the utility model;

[0020] Figure 3 This is the general diagram of the second lifting lug welded to the steel box girder of the utility model;

[0021] In the figure: 1- shoulder pole beam, 2- double I-beam, 3- triangular reinforcement plate, 4- first lifting ear, 5- second lifting ear, 6- pin ear hole, 7- precision-rolled threaded steel hanger rod. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] The installation diagram of the rear anchor lug device for the bridge-building machine provided by the utility model is as follows Figure 1 , Figure 2 , Figure 3 As shown, the top of the fine-rolled threaded steel hanger 7 is connected and fixed to the bridge crane (not shown in the figure), and the bottom of the fine-rolled threaded steel hanger 7 is connected and fixed with a shoulder pole beam 1, which is welded by double-jointed channel steels, and gaskets are welded on the top and bottom surfaces of the shoulder pole beam. A through hole is reserved on the gasket for the fine-rolled threaded steel hanger to pass through, and the bottom of the fine-rolled threaded steel hanger passes through the shoulder pole beam from the gasket, and a nut is set at the bottom of the shoulder pole beam to fix the fine-rolled threaded steel hanger;

[0024] A first lifting lug 4 is installed downward at the bottom center of the shoulder beam, and a second lifting lug 5 is installed upward at a corresponding position on the steel box beam. The second lifting lug 5 is connected to the first lifting lug 4 through a pin shaft; trapezoidal steel plates are vertically welded on both the front and rear surfaces of the second lifting lug 5, and the bottom edge of the trapezoidal steel plate is welded to the steel box beam. The first lifting lug clamps the second lifting lug inside, and the positions of the pin lug holes 6 of the two are corresponding.

[0025] Both ends of the shoulder beam are welded downward with double I-beams 2, and the bottom of the double I-beams 2 is welded and fixed to the steel box beam to prevent the shoulder beam from shaking forward and backward due to unbalanced force during the lifting process. The triangular reinforcing plate 3 is further welded on the side where the bottom of the double I-beam is welded to the steel box beam for reinforcement, and the side of the double I-beam is evenly welded with stiffening ribs to enhance its tensile resistance.

[0026] The installation steps of the rear anchor lug device of the bridge-building machine suitable for steel beam lifting provided by the utility model are as follows:

[0027] (1) First, position the steel box girder and weld the second lifting lug 5 at the corresponding position of the original rear anchor device of the bridge crane. Figure 3 ;

[0028] (2) On the basis of the original rear anchor of the bridge crane, a shoulder pole beam 1 is added, which is connected by a precision rolled threaded steel hanger rod. The precision rolled threaded steel hanger rod 7 passes through the interior of the shoulder pole beam 1 and is fixed at the bottom of the shoulder pole beam 1 by a combination of a gasket and a nut. The upper part is fixed by adding a pad and a nut to the top of the original shoulder pole beam of the rear anchor of the bridge crane. In this way, the newly added shoulder pole beam and the original rear anchor system of the bridge crane form a whole. Figure 1 As shown;

[0029] (3) When the bridge crane moves to the designated position, the shoulder beam 1 is installed, and the first lifting lug 4 on the shoulder beam 1 and the second lifting lug 5 on the steel box beam are precisely positioned and docked. After docking, the pin is passed through the pin hole 6 reserved on the lifting lug to connect and fix the first lifting lug and the second lifting lug. Then, the nuts at the top and bottom of the precision-rolled threaded steel hanger rod 7 are tightened. Figure 1 ;

[0030] (4) After the first lifting lug 4 on the shoulder beam 1 and the second lifting lug 5 on the steel box beam are connected, double-jointed I-beams 2 are welded on both sides of the shoulder beam 1, and the bottom of the double-jointed I-beams 2 is welded to the steel box beam to strengthen the welding of the lifting points and ensure the safety of lifting. Figure 1 As shown;

[0031] (5) After the double I-beam 2 is welded, a triangular reinforcing plate 3 is welded to the bottom of the side of the double I-beam. The side of the triangular reinforcing plate 3 is welded to the double I-beam 1, and the bottom is welded to the steel box girder. Figure 1 .

Claims

1. A rear anchor lug device for a bridge-building machine suitable for lifting steel beams, comprising at least a precision-rolled threaded steel hanger rod, characterized in that: The bottom of the fine-rolled threaded steel hanger is connected and fixed with a shoulder pole beam, which is welded by double-jointed channel steel, and gaskets are welded on the top and bottom surfaces of the shoulder pole beam, and a through hole is reserved on the gasket for the fine-rolled threaded steel hanger to pass through, the top of the fine-rolled threaded steel hanger is connected and fixed to the bridge deck crane, and the bottom of the fine-rolled threaded steel hanger passes through the shoulder pole beam from the gasket, and a nut is set at the bottom of the shoulder pole beam to fix the fine-rolled threaded steel hanger; A first lifting lug is installed downward at the center of the bottom of the shoulder beam, and a second lifting lug is installed upward at a corresponding position on the steel box beam, and the second lifting lug is connected to the first lifting lug through a pin shaft; Both ends of the shoulder pole beam are welded downward with double I-beams, and the bottom of the double I-beams are welded and fixed to the steel box beam to prevent the shoulder pole beam from shaking back and forth due to unbalanced force during lifting.

2. The rear anchor lug device of a bridge-building machine suitable for steel beam lifting according to claim 1 is characterized in that: The first lifting ear clamps the second lifting ear therein, and the positions of the pin ear holes of the two lifting ears correspond to each other.

3. The rear anchor lug device of a bridge-building machine suitable for steel beam lifting according to claim 1 is characterized in that: Continue to weld triangular reinforcement plates at the welding side of the bottom of the double-jointed I-beam and the steel box girder for reinforcement.

4. The rear anchor lug device of a bridge-building machine suitable for steel beam lifting according to claim 1 is characterized in that: The sides of the double-jointed I-beams are evenly welded with stiffening ribs to enhance their tensile resistance.

5. The rear anchor lug device of a bridge-building machine suitable for lifting steel beams according to claim 1 is characterized in that: Trapezoidal steel plates are vertically welded on both the front and rear surfaces of the second lifting eye, and the bottom edge of the trapezoidal steel plate is welded to the steel box girder.

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