Longitudinal adjusting device of steel beam hoisting system on bridge fabrication machine

Abstract

The utility model provides a longitudinal adjusting device of a steel beam hoisting system on a bridge fabrication machine, which comprises a lower bottom plate, an upper bottom plate, a locking mechanism and a center hole jack, the lower bottom plate is fixed at the top of a main beam, the upper bottom plate is fixed at the bottom of a front cross beam, and the upper bottom plate is attached to the upper part of the lower bottom plate and is positioned between two groups of longitudinal limiting blocks; the locking mechanism comprises a threaded rod, a locking block and a pushing block, the locking block is fixed to the upper bottom plate or the front cross beam, the threaded rod is horizontally arranged in the longitudinal direction, one end of the threaded rod penetrates through the locking block and is locked on the locking block, the other end of the threaded rod penetrates through the pushing block, and the pushing block is locked and abuts against the outer side of the longitudinal limiting block; the two sets of locking mechanisms are symmetrically arranged, and the center hole jack is arranged on one threaded rod in a penetrating mode and abuts against the outer side of the pushing block in a locked mode through a nut. The longitudinal adjusting device is easy to install, easy to adjust and operate, high in adjusting precision and high in speed.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge-building machines, in particular to a longitudinal adjustment device of a steel beam hoisting system on a bridge-building machine. Background Art

[0002] The steel box girder structure is a commonly used structural form for large-span bridges. It is made of welded steel plates. It is lighter than concrete beams, has high tensile strength, good toughness, good seismic performance, little environmental pollution, can be recycled, has a short construction period and low construction cost, and is widely used in bridge construction.

[0003] When the steel box girder is constructed across water, the steel girder is transported to the bridge site after being manufactured in the factory, and is usually hoisted by a large floating crane. However, the large floating crane is relatively wide and has high requirements for the water area. If there are ship locks along the water area, the large floating crane needs to be disassembled and the components need to be transported to the site by land or water before being assembled, which results in a long construction period, high construction costs, and many uncertain factors.

[0004] At present, it is possible to consider transforming the original bridge-building machine into a bridge crane for hoisting construction. Before the steel beam hoisting construction, the bridge-building machine needs to be moved in place and fixed. Due to the high precision requirements for the hoisting and installation of steel box girders, the travel accuracy of the bridge-building machine is difficult to meet the welding and installation requirements of steel box girders. Summary of the invention

[0005] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a longitudinal adjustment device for a steel beam lifting system on a bridge-building machine. The longitudinal adjustment device adjusts the longitudinal position of the steel beam lifting system through the cooperation of a through-type jack and a threaded rod. The device is simple to install, easy to adjust, and has high adjustment accuracy and fast speed.

[0006] The technical solution adopted to achieve the above-mentioned purpose of the utility model is:

[0007] A longitudinal adjustment device for a steel beam hoisting system on a bridge-building machine, the longitudinal adjustment device is installed between the bridge-building machine and the steel beam hoisting system, and longitudinally adjusts the position of the steel beam hoisting system, the steel beam hoisting system is installed on the front crossbeam of the bridge-building machine, and the longitudinal adjustment device is installed between the main beam and the front crossbeam of the bridge-building machine;

[0008] The longitudinal adjustment device comprises a lower bottom plate, an upper bottom plate, a locking mechanism and a through-type jack, wherein the lower bottom plate is fixed to the top of the main beam, the upper bottom plate is fixed to the bottom of the front cross beam, two groups of longitudinal limit blocks are symmetrically arranged at the front and rear parts of the upper bottom plate, the upper bottom plate is placed against the upper part of the lower bottom plate and is located between the two groups of longitudinal limit blocks, and a moving distance is reserved between the upper bottom plate and the longitudinal limit blocks;

[0009] The locking mechanism comprises a threaded rod, a locking block and a pushing block, wherein the locking block is fixed to the upper base plate or the front cross beam, the threaded rod is arranged horizontally in the longitudinal direction, one end of the threaded rod passes through the locking block and is locked on the locking block through a nut, and the other end of the threaded rod passes through the pushing block and is locked and pushed against the outer side of the longitudinal limit block through the nut;

[0010] The locking mechanism is symmetrically arranged with two groups at the front and rear parts of the lower base plate. The through-type jack is passed through one of the threaded rods and is locked against the outer side of the push block by a nut.

[0011] A set of longitudinal adjustment devices is provided for each main beam.

[0012] The contact surfaces between the upper base plate and the lower base plate are both smooth surfaces.

[0013] A tetrafluoroethylene sliding plate is installed on the upper surface of the lower base plate and / or the lower surface of the upper base plate.

[0014] Both sets of locking mechanisms are located at the longitudinal center line of the lower base plate.

[0015] A transverse limiting plate is fixed to the bottom of the front cross beam, and the transverse limiting plate is located at the left and right sides of the main beam.

[0016] The pushing blocks are long strip structures, and the pushing blocks of the two sets of locking mechanisms are both arranged in the transverse direction.

[0017] The locking block is in a C-shape as a whole, and the C-shaped opening of the locking block faces away from the pushing block in the same group of locking mechanisms.

[0018] The nuts on the threaded rods are all equipped with washers, which are locked by the nuts and washers.

[0019] The front cross beam of the bridge-building machine is composed of two horizontally arranged cross steel beams, and each cross steel beam is processed from double-jointed I-beams.

[0020] Compared with the prior art, the technical solution provided by the utility model has the following advantages: (1) The longitudinal adjustment device of the steel beam lifting system on the bridge-building machine provided by the utility model adjusts the longitudinal position of the steel beam lifting system by cooperating with a through-type jack and a threaded rod. The device is easy to install, easy to adjust, and has high adjustment accuracy and fast speed.

[0021] (2) In the utility model, a lower base plate is fixed on the main beam, an upper base plate is fixed on the bottom of the front cross beam, and the steel beam lifting system is installed on the front cross beam. The upper base plate and the lower base plate are locked by threaded rods. By tightening the nuts and pushing with the through-type jack connected to the threaded rods, the millimeter-level longitudinal fine-tuning of the front cross beam can be achieved, and then the longitudinal fine-tuning of the steel beam lifting system on the front cross beam can be achieved.

[0022] (3) The threaded rod in the utility model can be quickly unlocked, which is convenient for adjusting the position of the front beam. When adjusting the position, the lateral limit plate is used to limit the position horizontally to ensure that the front beam does not shift left or right when sliding forward and backward. After the adjustment is completed, the threaded rod can be quickly locked to ensure that the position of the steel beam lifting system remains unchanged during lifting.

[0023] (4) In the present invention, a tetrafluoroethylene sliding plate is installed on the upper surface of the lower base plate to reduce the sliding resistance between the upper base plate and the lower base plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The utility model provides a side view of the installation of a longitudinal adjustment device of a steel beam hoisting system on a bridge-building machine;

[0025] Figure 2 The utility model provides an installation top view of the longitudinal adjustment device of the steel beam hoisting system on the bridge-building machine;

[0026] Figure 3 It is a side view of the longitudinal adjustment device in the utility model;

[0027] Figure 4 It is a top view of the longitudinal adjustment device in the utility model;

[0028] Figure 5 This is a front view of the longitudinal adjustment device of the utility model installed on the front crossbeam;

[0029] In the figure: 1-main beam, 2-front cross beam, 3-lower bottom plate, 4-upper bottom plate, 5-longitudinal limit block, 6-tetrafluoroethylene slide plate, 7-threaded rod, 8-locking block, 9-pushing block, 10-through-type jack, 11-lateral limit plate. DETAILED DESCRIPTION

[0030] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] In this embodiment, the original bridge-building machine is transformed into a bridge crane to carry out the lifting construction of steel beams. Therefore, a steel beam lifting system (not shown in the figure) for lifting steel beams is installed on the bridge-building machine to realize the lifting construction of steel beams. The bridge-building machine includes three main beams 1 and a front cross beam 2 connected to the three main beams. The structure of the bridge-building machine is prior art and will not be described in detail here.

[0032] In order to meet the accuracy requirements of steel beam installation, in this embodiment, a longitudinal adjustment device is installed between the bridge-building machine and the steel beam hoisting system. Specifically, the steel beam hoisting system is installed on the front crossbeam of the bridge-building machine, and the longitudinal adjustment device is installed between the main beam and the front crossbeam of the bridge-building machine. Figure 1-Figure 2 In this embodiment, each main beam is provided with a set of longitudinal adjustment devices, that is, there are three sets of longitudinal adjustment devices in total. Figure 2 When adjusting the position, the three sets of longitudinal adjustment devices are adjusted at the same time, so as to adjust the longitudinal position of the front cross beam, and then adjust the longitudinal position of the steel beam hoisting system on the front cross beam.

[0033] It should be noted that, since the steel beam hoisting system in this application is installed on the front crossbeam of the bridge-building machine, the front crossbeam bears a large load when hoisting the steel beam, so the front crossbeam in this embodiment is composed of two horizontally arranged cross beams, each of which is made of double-jointed I-beams, so that it can better bear the load when hoisting the steel beam. Figure 2 .

[0034] Each set of longitudinal adjustment devices includes a lower bottom plate 3, an upper bottom plate 4, a locking mechanism and a through-type jack 10, wherein the lower bottom plate is fixed to the top of the main beam, the upper bottom plate is fixed to the bottom of the front cross beam (two horizontal steel beams across the front cross beam), and two groups of longitudinal limit blocks 5 are symmetrically welded at the front and rear parts of the upper bottom plate. The upper bottom plate is placed against the upper part of the lower bottom plate and is located between the two groups of longitudinal limit blocks. A moving distance is reserved between the upper bottom plate and the longitudinal limit blocks, such as Figure 3-Figure 5 Specifically, each set of longitudinal limit blocks includes two longitudinal limit blocks distributed in the transverse direction.

[0035] In this embodiment, the contact surface between the upper base plate and the lower base plate is a smooth surface to reduce the resistance when the upper base plate and the lower base plate move relative to each other. For example, the upper surface of the lower base plate and the lower surface of the upper base plate are polished smooth before installation. In this embodiment, the sliding resistance of the contact surface is reduced by connecting a tetrafluoroethylene slide plate 6 to the upper base plate and / or the lower base plate. In this embodiment, a tetrafluoroethylene slide plate is placed between the two sets of longitudinal limit blocks so that the tetrafluoroethylene slide plate will not move on the lower base plate. The upper base plate is placed against the tetrafluoroethylene slide plate. Figure 3 When adjusting the longitudinal movement, the upper base plate slides on the PTFE slide plate to reduce the power. Furthermore, the upper base plate has rounded corners to prevent scratches on the PTFE slide plate below. In actual settings, PTFE slide plates can also be fixed on the upper surface of the lower base plate and the lower surface of the upper base plate to reduce the resistance when the upper base plate and the lower base plate move relative to each other. When installing, butter can be applied between the two PTFE slide plates to provide sliding ability and further reduce resistance.

[0036] The locking mechanism includes a threaded rod 7, a locking block 8 and a push block 9, see Figure 3 and Figure 4 The locking block is fixed on the upper front cross beam, and the threaded rod is arranged horizontally in the longitudinal direction. One end of the threaded rod passes through the locking block and is locked on the locking block through a nut and a pad. The other end of the threaded rod passes through the push block and is locked on the outer side of the longitudinal limit block through a nut and a pad, thereby locking the longitudinal positions of the lower base plate and the upper base plate through the locking mechanism.

[0037] In this embodiment, two sets of locking mechanisms are symmetrically arranged at the front and rear parts of the lower base plate, that is, the push blocks of the two sets of locking mechanisms are locked on the outside of the two sets of longitudinal limit blocks. Specifically, the two sets of locking mechanisms are located at the longitudinal center line of the lower base plate to ensure that the force of the push is balanced in the later stage. The through-type jack is inserted into one of the threaded rods and locked on the outside of the push block by nuts and washers. Figure 3 .

[0038] Furthermore, the locking block is in a C-shape as a whole, and the C-shaped opening of the locking block faces away from the push block in the same set of locking mechanisms. Specifically, the locking block is welded by longitudinal steel plates on both sides and a transverse steel plate in the middle, and the longitudinal steel plates on both sides are welded to the lower rib of the front crossbeam. Figure 3 and Figure 5 The longitudinal steel plates on both sides provide support for the middle steel plate, and the locking block structure is stable.

[0039] Furthermore, the push block is a long strip structure, which is made of double-jointed I-beams. The push blocks of the two sets of locking mechanisms are both arranged in the transverse direction.

[0040] In this embodiment, a transverse limit plate 11 is fixed at the bottom of the front cross beam. The transverse limit plate is located at the left and right sides of the main beam to limit the left and right movement of the front cross beam when the longitudinal movement is limited. Figure 4 and Figure 5 Specifically, two transverse limit plates are provided on each of the left and right sides, that is, four transverse limit plates are provided in each set of longitudinal adjustment devices.

[0041] The working method of the longitudinal adjustment device of the steel beam hoisting system on the bridge-building machine provided in this embodiment is as follows: when the steel beam hoisting system needs to be adjusted to move forward longitudinally, the nut and gasket at the rear push block can be loosened at this time, and the through-type jack can be inserted from the rear threaded rod, and the nut and gasket are locked so that the through-type jack is pressed between the nut and the push block, and the nut at the rear second locking block and the front threaded rod is loosened. The required lifting length is calculated according to the measured data, and the through-type jack is lifted to achieve the required length of the forward longitudinal movement of the front beam, thereby achieving the adjustment of the longitudinal position of the steel beam hoisting system. If the steel beam hoisting system is adjusted to move longitudinally backward, the through-type jack is installed on the front threaded rod. This working condition always needs to ensure the synchronization of the through-type jacks of each set of longitudinal adjustment devices.

Claims

1. A longitudinal adjustment device for a steel beam hoisting system on a bridge-building machine, the longitudinal adjustment device being installed between the bridge-building machine and the steel beam hoisting system to longitudinally adjust the position of the steel beam hoisting system, characterized in that: The steel beam hoisting system is installed on the front cross beam of the bridge-building machine, and the longitudinal adjustment device is installed between the main beam and the front cross beam of the bridge-building machine; The longitudinal adjustment device comprises a lower bottom plate, an upper bottom plate, a locking mechanism and a through-type jack, wherein the lower bottom plate is fixed to the top of the main beam, the upper bottom plate is fixed to the bottom of the front cross beam, two groups of longitudinal limit blocks are symmetrically arranged at the front and rear parts of the upper bottom plate, the upper bottom plate is placed against the upper part of the lower bottom plate and is located between the two groups of longitudinal limit blocks, and a moving distance is reserved between the upper bottom plate and the longitudinal limit blocks; The locking mechanism comprises a threaded rod, a locking block and a pushing block, wherein the locking block is fixed to the upper base plate or the front cross beam, the threaded rod is arranged horizontally in the longitudinal direction, one end of the threaded rod passes through the locking block and is locked on the locking block through a nut, and the other end of the threaded rod passes through the pushing block and is locked and pushed against the outer side of the longitudinal limit block through the nut; The locking mechanism is symmetrically arranged with two groups at the front and rear parts of the lower base plate. The through-type jack is passed through one of the threaded rods and is locked against the outer side of the push block by a nut.

2. The longitudinal adjustment device of the steel beam hoisting system on the bridge-building machine according to claim 1 is characterized in that: A set of longitudinal adjustment devices is provided for each main beam.

3. The longitudinal adjustment device of the steel beam hoisting system on the bridge-building machine according to claim 1 is characterized in that: The contact surfaces between the upper base plate and the lower base plate are both smooth surfaces.

4. The longitudinal adjustment device of the steel beam hoisting system on the bridge-building machine according to claim 3 is characterized in that: A tetrafluoroethylene sliding plate is installed on the upper surface of the lower base plate and / or the lower surface of the upper base plate.

5. The longitudinal adjustment device of the steel beam hoisting system on the bridge-building machine according to claim 1 is characterized in that: Both sets of locking mechanisms are located at the longitudinal center line of the lower base plate.

6. The longitudinal adjustment device of the steel beam hoisting system on the bridge-building machine according to claim 1 is characterized in that: A transverse limiting plate is fixed to the bottom of the front cross beam, and the transverse limiting plate is located at the left and right sides of the main beam.

7. The longitudinal adjustment device of the steel beam hoisting system on the bridge-building machine according to claim 1 is characterized by: The pushing blocks are long strip structures, and the pushing blocks of the two sets of locking mechanisms are both arranged in the transverse direction.

8. The longitudinal adjustment device of the steel beam hoisting system on the bridge-building machine according to claim 1 is characterized by: The locking block is in a C-shape as a whole, and the C-shaped opening of the locking block faces away from the pushing block in the same group of locking mechanisms.

9. The longitudinal adjustment device of the steel beam hoisting system on the bridge-building machine according to claim 1 is characterized in that: The nuts on the threaded rods are all equipped with washers, which are locked by the nuts and washers.

10. The longitudinal adjustment device of the steel beam hoisting system on the bridge-building machine according to claim 1 is characterized in that: The front cross beam of the bridge-building machine is composed of two horizontally arranged cross steel beams, and each cross steel beam is processed from double-jointed I-beams.

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