Steel lattice beam hoist and hoisting method

Abstract

The present invention provides a steel lattice girder hoist and a hoisting method, comprising a main girder, an upper crossbeam, a lower crossbeam, an upper support rod, and a lower support rod. The main girder is arranged vertically, and the upper crossbeam and the lower crossbeam are both arranged horizontally. The upper crossbeam is located above the lower crossbeam and is connected to the main girder. An installation space for inserting one end of the steel lattice girder is formed between the upper crossbeam, the lower crossbeam, and the main girder. An anchor hole for installing a tensioning steel strand is provided on the upper crossbeam and / or the lower crossbeam. The upper support rod is located on a side of the upper crossbeam facing away from the lower crossbeam, and opposite ends of the upper support rod are respectively connected to the upper crossbeam and the main girder. The lower support rod is located on a side of the lower crossbeam facing away from the upper crossbeam, and opposite ends of the lower support rod are respectively connected to the lower crossbeam and the main girder. Lifting lugs are installed on the main girder and / or the upper crossbeam. The hoist can be installed with the steel lattice girder without damaging the original structure of the steel lattice girder. Compared with a pin-type hoist, the hoist can reduce the workload of temporary welding on site, saving labor costs and working time.

Description

Technical Field

[0001] The invention relates to a steel lattice beam hoisting construction technology, and in particular to a steel lattice beam hoisting device and a hoisting method. Background Art

[0002] In the prior art, the lifting of steel lattice girders for steel tube arch bridges typically involves first installing extension slings or pin-type slings at opposite ends of the steel lattice girders. Cables are then connected to the lifting lugs of the extension slings or pin-type slings to lift the lattice girders. When the extension slings are installed on the steel lattice girders, matching holes must be drilled in the girders before the extension slings can be bolted to the girders for lifting. This has the following major disadvantages: 1. The permanent structure of the steel lattice girders must be destroyed, reducing their design strength. 2. The slings have limited applicability and require specific design to accommodate steel lattice girders of varying beam heights. For example, Publication No. CN209778062U discloses an extension sling for lifting lattice girders for steel tube arch bridges.

[0003] When installing a pin-type spreader on a steel lattice girder, temporary ear plates must be welded to the steel lattice girder, and then the pin-type spreader and the steel lattice girder must be bolted together. The main disadvantages are: 1. The workload of temporarily welding the ear plates on site is large; 2. The spreader needs to be specifically designed to accommodate steel lattice girders of different sizes. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems raised in the above-mentioned background technology, and provides a steel lattice beam hanger, which can be installed with the steel lattice beam without destroying the original structure of the steel lattice beam, and compared with the pin-type hanger, it can reduce the workload of on-site temporary welding, save labor costs and working time.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The lifting mechanism is connected with the lifting mechanism, and the lifting mechanism is connected with the lifting mechanism of the lifting mechanism, and the lifting mechanism is connected with the lifting mechanism of the lifting mechanism.

[0007] Furthermore, one end of the upper crossbeam and one end of the lower crossbeam are detachably connected to the main beam through fixing parts; a plurality of first mounting holes are provided on the main beam at intervals along the length direction, and a plurality of second mounting holes are provided on the upper crossbeam and the lower crossbeam at intervals along their respective length directions, and the fixing parts are passed through some of the first mounting holes and some of the second mounting holes.

[0008] Furthermore, the upper support rod and the lower support rod are both telescopic rods, one end of the upper support rod is hinged to the main beam, and the end of the upper support rod away from the main beam is detachably connected to the upper cross beam through a first hinge; one end of the lower support rod is hinged to the main beam, and the end of the lower support rod away from the main beam is detachably connected to the lower cross beam through a second hinge.

[0009] Furthermore, the upper crossbeam is provided with a plurality of first fixing holes spaced apart along the length direction, and the first hinge is detachably connected to the first fixing hole of the preset installation position through a first connecting member; the lower crossbeam is provided with a plurality of second fixing holes spaced apart along the length direction, and the second hinge is connected to the second fixing hole of the preset installation position through a second connecting member.

[0010] Furthermore, the upper crossbeam and the lower crossbeam each include two parallel and spaced beam plates and a fixing seat fixed to one end of the two beam plates, a plug-in slot is formed between the two beam plates, and the upper crossbeam and the lower crossbeam are sleeved on the main beam through the corresponding plug-in slot; the second mounting hole is opened on the beam plate, the first fixing hole is opened on the beam plate of the upper crossbeam; the second fixing hole is opened on the beam plate of the lower crossbeam; the anchor port includes an upper anchor port and a lower anchor port, the upper anchor port is provided on the fixing seat of the upper crossbeam; the lower anchor port is provided on the fixing seat of the lower crossbeam.

[0011] Furthermore, the upper crossbeam and the lower crossbeam each include at least one closing plate, and the closing plate is detachably connected to the top and / or bottom of the two corresponding beam plates.

[0012] Furthermore, each beam plate includes a main plate and two flange plates, the main plates of the two beam plates are arranged in parallel and spaced apart to form the plug-in slot, the two flange plates are respectively fixed to the top and bottom of the corresponding main plates, and are vertically connected to the side of the corresponding main plates facing away from the plug-in slot; the two main plates of the upper crossbeam and the two main plates of the lower crossbeam are both provided with the second mounting holes; the two flange plates of the upper crossbeam are both provided with the first fixing holes, and the two flange plates of the lower crossbeam are both provided with the second fixing holes; the fixing seat is passed through the plug-in slot and fixedly connected to the flange plates of the corresponding two beam plates.

[0013] Furthermore, the upper support rod and the lower support rod each include a first screw, a second screw and an adjusting sleeve, the first end of the first screw is hinged to the main beam, and the second end of the first screw is provided with a first external thread; the first end of the second screw of the upper support rod is rotatably connected to the upper cross beam, and the first end of the second screw of the lower support rod is rotatably connected to the lower cross beam; the second end of the second screw is provided with a second external thread, and the second external thread has an opposite rotation direction to the first external thread; the adjusting sleeve is sleeved on the second end of the corresponding first screw and the second end of the corresponding second screw, and is threadedly connected to the second end of the corresponding first screw and the second end of the corresponding second screw.

[0014] Furthermore, the steel lattice beam hanger also includes a first pair of tension steel strands installed at the upper anchor port and a second pair of tension steel strands installed at the lower anchor port.

[0015] The present invention also provides a method for hoisting a steel lattice beam, comprising the following steps:

[0016] S1, installing at least one steel lattice beam hanger at opposite ends of the steel lattice beam, respectively, so that the opposite ends of the steel lattice beam are respectively inserted into the installation space of the steel lattice beam hanger at the corresponding end, and the upper crossbeam and the lower crossbeam cooperate with each other to clamp the steel lattice beam at the corresponding end, and the opposite ends of the upper support rod respectively abut against the side of the main beam and the upper crossbeam facing away from the installation space, and the opposite ends of the lower support rod respectively abut against the side of the main beam and the lower crossbeam facing away from the installation space;

[0017] S2, tensioning the tensioning steel strands at the anchor openings of the two steel lattice girder hangers at opposite ends of the steel lattice girder;

[0018] S3, connecting cables to the lifting ears of the steel lattice beam hoist to lift the steel lattice beam.

[0019] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0020] 1. During installation, the steel lattice beam hanger is installed by inserting the ends of the steel lattice beams into the installation space of the hanger. The upper and lower crossbeams cooperate to clamp the ends of the steel lattice beams, thereby achieving a connection between the hanger and the steel lattice beams. Compared to conventional extension hangers, this hanger does not require damage to the original structure of the steel lattice beams. Compared to pin-type hangers, it can reduce the amount of temporary on-site welding work, saving labor costs and working time. The upper and lower support rods provide support for the upper and lower crossbeams during the lifting process. When lifting heavy steel lattice beams, they can effectively prevent deformation of the upper and lower crossbeams, thereby enabling the upper and lower crossbeams to stably clamp the ends of the steel lattice beams.

[0021] 2. The above-mentioned steel lattice beam hoist has a plurality of first mounting holes spaced apart along the length direction on the main beam, and a plurality of second mounting holes spaced apart along the length directions of the upper and lower beams. When in use, the positions of the upper and lower beams can be adjusted horizontally and vertically by plugging the fixing parts into the first mounting holes and the second mounting holes at different positions to adapt to the hoisting of steel lattice beams with different beam heights and different cantilever hoisting states, so that the above-mentioned steel lattice beam hoist has universality and there is no need to design the hoist specifically for steel lattice beams of different sizes.

[0022] 3. The above-mentioned steel lattice girder hoist and hoisting method can prevent the hoist from moving along the transverse direction of the bridge during the hoisting process by arranging tensioning steel strands on the steel lattice girder hoist at opposite ends of the steel lattice girder, thereby improving the safety of the hoisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view of a steel lattice beam hanger according to a preferred embodiment of the present invention;

[0024] Figure 2 for Figure 1 A perspective view of the steel lattice girder hanger from another perspective;

[0025] Figure 3 for Figure 1 A front view of the steel lattice girder hanger is shown;

[0026] Figure 4 This is a schematic diagram of the state of the steel lattice beam hanger in use according to an embodiment of the present invention;

[0027] Figure 5 for Figure 4 The main view;

[0028] Description of main component symbols

[0029] 1. Main beam; 11. First mounting hole; 12. Articulated seat; 20. Closing plate; 21. Upper crossbeam; 22. Upper anchor; 23. Lower crossbeam; 24. Lower anchor; 25. Beam plate; 26. Fixing seat; 27. Plug slot; 28. Main board; 281. Second mounting hole; 29. Flange plate; 291. First fixing hole; 292. Second fixing hole; 41. Upper support rod; 43. Lower support rod; 44. First screw; 45. Second screw; 46. Adjusting sleeve; 6. Installation space; 7. Lifting ear; 81. First hinge; 82. Second hinge; 83. Fixing plate; 84. Fixing ear; 91. First pair of tension strands; 92. First pair of tension strands; 94. Sleeper; 100. Steel lattice beam. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Please also see Figures 1 to 5 A preferred embodiment of the present invention provides a steel lattice beam hanger, including a main beam 1, an upper cross beam 21, a lower cross beam 23, an upper support rod 41 and a lower support rod 43. The main beam 1 is arranged vertically, and the upper cross beam 21 and the lower cross beam 23 are both arranged horizontally. The upper cross beam 21 is located above the lower cross beam 23, and the upper cross beam 21 and the lower cross beam 23 are respectively connected to the main beam 1. An installation space 6 for inserting one end of the steel lattice beam 100 is formed between the upper cross beam 21, the lower cross beam 23 and the main beam 1; the upper support rod 41 is located on the side of the upper cross beam 21 facing away from the lower cross beam 23, and the opposite ends of the upper support rod 41 are respectively connected to the upper cross beam 21 and the main beam 1; the lower support rod 43 is located on the side of the lower cross beam 23 facing away from the upper cross beam 21, and the opposite ends of the lower support rod 43 are respectively connected to the lower cross beam 23 and the main beam 1.

[0034] The main beam 1 is provided with a lifting lug 7. In this embodiment, the lifting lug 7 is fixed to the side of the main beam 1 facing away from the installation space 6. The main beam 1 is provided with a plurality of first installation holes 11 along its length, that is, vertically spaced apart.

[0035] The lengths of the upper crossbeam 21 and the lower crossbeam 23 are both parallel to the horizontal direction perpendicular to the main beam 1. Anchor openings (not shown) for mounting tensioning steel strands are provided on the upper crossbeam 21 and / or the lower crossbeam 23. In this embodiment, the anchor openings include an upper anchor opening 22 and a lower anchor opening 24. The upper crossbeam 21 is provided with the upper anchor opening 22 for mounting tensioning steel strands, while the lower crossbeam 23 is provided with the lower anchor opening 24 for mounting tensioning steel strands. In this embodiment, the upper crossbeam 21 and the lower crossbeam 23 each include two parallel, spaced-apart beam plates 25 and a fixing seat 26 fixed to one end of the beam plates 25. The beam plates 25 are arranged horizontally, and a connecting slot 27 is formed between the beam plates 25. The upper crossbeam 21 and the lower crossbeam 23 are connected to the main beam 1 through the corresponding connecting slots 27. In this embodiment, the beam plate 25 is made of channel steel, and each beam plate 25 includes a main plate 28 and two flange plates 29. The main plates 28 of the two beam plates 25 are arranged in parallel and spaced apart to form the plug-in slot 27. The two flange plates 29 are respectively fixed to the top and bottom of the corresponding main plate 28, and are vertically connected to the side of the corresponding main plate 28 facing away from the plug-in slot 27.

[0036] One end of the upper crossbeam 21 and one end of the lower crossbeam 23 are both detachably connected to the main beam 1 via fixings (not shown). Specifically, the main plate 28 of the beam plate 25 of the upper crossbeam 21 and the main plate 28 of the beam plate 25 of the lower crossbeam 23 are provided with a plurality of second mounting holes 281 spaced apart along their respective lengths, and fixings are provided through the first mounting holes 11 and the second mounting holes 281 at corresponding positions. The fixings can be shear bolts or pins of the prior art, etc., and their structures belong to the prior art. To save space, they will not be described here. The main plate 28 is connected to the main beam 1 via at least two of the fixings, and at least two of the fixings are provided through the first mounting holes 11 and the corresponding second mounting holes 281 at different positions to prevent the upper crossbeam 21 and the lower crossbeam 23 from rotating relative to the main beam 1.

[0037] In this embodiment, a plurality of first fixing holes 291 are provided on both flange plates 29 of the upper crossbeam 21, and the plurality of first fixing holes 291 on each flange plate 29 are spaced apart along the length direction of the upper crossbeam 21; a plurality of second fixing holes 292 are provided on both flange plates 29 of the lower crossbeam 23, and the plurality of second fixing holes 292 on each flange plate 29 are spaced apart along the length direction of the lower crossbeam 23.

[0038] The fixing seat 26 is inserted into the corresponding insertion groove 27 and fixedly connects the flange plates 29 of the corresponding two beam plates 25. The fixing seat 26 of the upper crossbeam 21 is provided with the upper anchor port 22, and the fixing seat 26 of the upper crossbeam 21 is provided with the lower anchor port 24.

[0039] Each of the upper crossbeam 21 and the lower crossbeam 23 further includes at least one sealing plate 20, which is detachably connected to the top and / or bottom of the two corresponding beam plates 25 to further enhance the overall strength of the upper crossbeam 21 and the lower crossbeam 23. In this embodiment, a plurality of sealing plates 20 are provided at the bottom of the upper crossbeam 21, spaced apart along the length of the upper crossbeam 21. Each sealing plate 20 is detachably connected to a corresponding first fixing hole 291 on the flange plate 29 at the bottom of the two beam plates 25 of the upper crossbeam 21 via mounting members such as bolts. It will be appreciated that the tops of the two beam plates 25 of the upper crossbeam 21 may also be connected via sealing plates 20 to further enhance the overall strength of the upper crossbeam 21. In this case, the sealing plates 20 at the top of the upper crossbeam 21 may be detachably connected to the corresponding first fixing holes 291 on the flange plate 29 at the top of the two beam plates 25 of the upper crossbeam 21 via mounting members such as bolts. In this embodiment, a plurality of closing plates 20 are provided at both the top and bottom of the lower crossbeam 23. The closing plates 20 at the top and the bottom of the lower crossbeam 23 are spaced apart along the length of the lower crossbeam 23. Each closing plate 20 is detachably connected to a corresponding second fixing hole 292 on the flange plate 29 of the two beam plates 25 via mounting members such as bolts. It is understood that the closing plates 20 connecting the two beam plates 25 may also be provided only at the top or bottom of the lower crossbeam 23.

[0040] In this embodiment, a lifting lug 7 is further provided on the upper crossbeam 21, which is detachably connected to the first fixing holes 291 on the two flange plates 29 at the top of the upper crossbeam 21 through mounting parts such as bolts, so that the position of the lifting point can be removed or adjusted according to the needs of lifting.

[0041] In this embodiment, the upper support rod 41 and the lower support rod 43 are both telescopic rods, one end of the upper support rod 41 is hinged to the main beam 1, and the end of the upper support rod 41 away from the main beam 1 is detachably connected to the upper cross beam 21 through a first hinge 81; one end of the lower support rod 43 is hinged to the main beam 1, and the end of the lower support rod 43 away from the main beam 1 is detachably connected to the lower cross beam 23 through a second hinge 82.

[0042] Specifically, the upper support rod 41 and the lower support rod 43 each include a first screw rod 44, a second screw rod 45, and an adjustment sleeve 46. The first end of the first screw rod 44 in the upper support rod 41 and the lower support rod 43 is rotatably connected to the main beam 1. In this embodiment, the upper support rod 41 and the lower support rod 43 are also detachable from the main beam 1. Specifically, the main beam 1 is equipped with two hinge seats 12 spaced apart along its length. The first end of the first screw rod 44 in the upper support rod 41 and the first end of the first screw rod 44 in the lower support rod 43 are detachably connected to the two hinge seats 12 via connecting shafts (not shown) and can rotate relative to the hinge seats 12. The connecting shafts can be pins or the like as known in the art. When disassembly is required, the pins can be withdrawn from the hinge seats 12 and the first end of the first screw rod 44 to separate the main beam 1 from the upper support rod 41 and the lower support rod 43. The second end of the first screw rod 44 is provided with a first external thread (not shown).

[0043] The first end of the second screw rod 45 of the upper support rod 41 is rotatably connected to the upper crossbeam 21. In this embodiment, the end of the upper support rod 41 away from the main beam 1, i.e., the first end of the second screw rod 45, is detachably connected to the beam plate 25 of the upper crossbeam 21 via a first hinge 81. The first end of the second screw rod 45 of the lower support rod 43 is rotatably connected to the lower crossbeam 23. In this embodiment, the end of the lower support rod 43 away from the main beam 1, i.e., the first end of the second screw rod 45, is detachably connected to the beam plate 25 of the lower crossbeam 23 via a second hinge 82. In this embodiment, the first hinge 81 and the second hinge 82 have the same structure, each including a fixing plate 83 and two fixing ears 84, with the two fixing ears 84 being fixed relative to each other on the same surface of the fixing plate 83. The first end of the second screw rod 45 of the upper support rod 41 and the first end of the second screw rod 45 of the lower support rod 43 are both rotatably connected to the two fixing ears 84 via a mounting shaft (not shown). The mounting shaft can be a latch or the like using existing technology. When disassembly is required, the latch can be pulled out from the fixing ear 84 and the first end of the second screw 45 to separate the upper support rod 41 from the upper crossbeam 21 and the lower support rod 43 from the lower crossbeam 23. The fixing plate 83 of the first hinge 81 is detachably connected to the first fixing hole 291 of the preset mounting position via a first connecting member (not shown); the fixing plate 83 of the second hinge 82 is detachably connected to the second fixing hole 292 of the preset mounting position via a second connecting member (not shown). The first connecting member and the second connecting member can be bolts or the like using existing technology. A second external thread (not shown) is provided on the second end of the second screw 45 of the upper support rod 41 and the second end of the second screw 45 of the lower support rod 43. The second external thread has an opposite direction of rotation to the first external thread.

[0044] The adjustment sleeve 46 is sleeved over the second end of the corresponding first screw rod 44 and the second end of the corresponding second screw rod 45, and is threadedly connected to the second end of the corresponding first screw rod 44 and the second end of the corresponding second screw rod 45. During use, the adjustment sleeve 46 is rotated to move the first screw rod 44 and the second screw rod 45 closer to or farther away from each other, thereby adjusting the length of the upper support rod 41 and the lower support rod 43 to abut against the upper crossbeam 21 and the lower crossbeam 23.

[0045] The upper support rod 41 of this embodiment is rotatably connected to the main beam 1 and the upper cross beam 21 at two opposite ends by pins, and the lower support rod 43 is detachably connected to the main beam 1 and the lower cross beam 23 at two opposite ends by pins, which not only makes it convenient to adjust the position of the upper support rod 41 and the lower support rod 43 against the upper cross beam 21 or the lower cross beam 23, but also avoids stress concentration at the connection.

[0046] In this embodiment, the tension steel strands include a first tension steel strand 91 and a second tension steel strand 92 . The first tension steel strand 91 is installed at the upper anchor 22 , and the second tension steel strand 92 is installed at the lower anchor 24 .

[0047] The embodiment of the present invention further provides a method for hoisting a steel lattice beam, comprising the following steps:

[0048] S1. Install the steel lattice beam hangers at the opposite ends of the steel lattice beam 100, so that the opposite ends of the steel lattice beam 100 are respectively inserted into the installation space 6 of the corresponding end steel lattice beam hanger, so that the opposite ends of the steel lattice beam are respectively abutted against the main beam 1 of the corresponding end steel lattice beam hanger, and through the extension and contraction of the upper support rod 41, one end of the upper support rod 41 is abutted against the top of the upper cross beam 21, and through the extension and contraction of the lower support rod 43, one end of the lower support rod 43 is abutted against the top of the upper cross beam 21, so that the upper cross beam 21 and the lower cross beam 23 cooperate with each other to clamp the steel lattice beam 100 at the corresponding end.

[0049] Specifically, in this embodiment, step S1 includes:

[0050] S11, laying sleepers 94 on the top surface of the steel lattice beam 100;

[0051] S12, using a crane (not shown) to place the upper crossbeam 21 on the sleepers 94 on the top surface of the steel lattice girder 100, and according to the length of the steel lattice girder 100 that needs to be inserted into the installation space 6, move the upper crossbeam 21 along the transverse bridge direction, that is, the length direction of the steel lattice girder 100, to adjust the length of the upper crossbeam 21 extending from one end of the steel lattice girder 100, and connect the closing plate 20 on the upper crossbeam 21 to the top and / or bottom of the two beam plates 25 of the upper crossbeam 21 through mounting parts such as bolts. The number of closing plates 20 is selected according to actual needs, wherein a space for the main beam 1 to be inserted is formed between the closing plate 20 farthest from the upper anchor port 22 and the end of the two beam plates 25 of the upper crossbeam 21 farthest from the upper anchor port 22;

[0052] S13, according to the length of the steel lattice girder 100 that needs to be inserted into the installation space 6, adjust the lower cross beam 23 in the transverse direction, and after the lower cross beam 23 is adjusted into place, connect the lower cross beam 23 and the main beam 1 together through fixing parts, and connect the closing plate 20 on the lower cross beam 23 to the top and / or bottom of the two beam plates 25 of the lower cross beam 23 through mounting parts such as bolts. The number of closing plates 20 is selected according to actual needs, and a space for the main beam 1 to be inserted is formed between the closing plate 20 farthest from the lower anchor port 24 and the end of the two beam plates 25 of the lower cross beam 23 farthest from the lower anchor port 24;

[0053] S14, adjust the length of the lower support rod 43 so that the end of the lower support rod 43 away from the main beam 1 is supported at the bottom of the lower cross beam 23 and is hinged to the lower cross beam 23 through the second hinge 82;

[0054] S15, hoisting the structure consisting of the main beam 1, the lower cross beam 23, and the lower support rod 43 as a whole, so that the lower cross beam 23 is a preset distance from the steel lattice girder 100, for example, about 15 cm, and ensuring that at least a portion of the first mounting holes 11 of the main beam 1 is aligned with at least a portion of the second mounting holes 281 on the upper cross beam 21;

[0055] S16, using a fixing member to penetrate the first mounting hole 11 of the main beam 1 and the second mounting hole 281 of the upper cross beam 21, thereby connecting the main beam 1 and the upper cross beam 21 together;

[0056] S17, adjust the length of the upper support rod 41 so that the end of the upper support rod 41 away from the main beam 1 abuts against the top of the upper crossbeam 21 and is hinged to the upper crossbeam 21 through the first hinge 81;

[0057] S18, insert the sleepers 94 between the bottom surface of the steel lattice beam 100 and the lower cross beam 23 to ensure that the sleepers 94 are compacted.

[0058] S2, tensioning the first pair of steel strands 91 at the upper anchor openings 22 of the two steel lattice beam hangers at opposite ends of the steel lattice beam 100, and tensioning the second pair of steel strands 92 at the lower anchor openings 24 of the two steel lattice beam hangers at opposite ends of the steel lattice beam 100;

[0059] S3, connecting the cable to the lifting lug 7 of the steel lattice girder hoist and lifting the steel lattice girder 100.

[0060] After the steel lattice girder 100 is installed in place, the process further includes step S4:

[0061] S4: removing the steel lattice girder hanger from the steel lattice girder 100. Specifically, step S4 includes:

[0062] S41, loosening the first pair of tensioning steel strands 91 of the upper anchor 22;

[0063] S42, keeping the lifting point fixed during the lifting, respectively remove the connection between the upper support rod 41 and the main beam 1, and the upper support rod 41 and the upper crossbeam 21, so that the upper support rod 41 is separated from the main beam 1 and the upper support rod 41;

[0064] S43, removing the fixings connecting the upper crossbeam 21 and the main beam 1, so that the upper crossbeam 21 is separated from the main beam 1;

[0065] S44, hoisting the upper cross beam 21 and the upper support rod 41 to the ground, and finally lowering the remaining structure of the steel lattice beam hoist to the ground;

[0066] S45, loosening the second tensioning steel strand 92 of the lower anchor 24;

[0067] S46, remove the lower support rod 43 from the main beam 1 and the lower cross beam 23;

[0068] S47, removing the fixings connecting the lower cross beam 23 and the main beam 1;

[0069] S48, recycle all components to the designated place for storage.

[0070] When installing the steel lattice girder hanger, the ends of the steel lattice girder 100 are inserted into the installation space 6 of the steel lattice girder hanger. The upper crossbeam 21 and the lower crossbeam 23 cooperate with each other to clamp the ends of the steel lattice girder 100, thereby achieving a connection between the steel lattice girder hanger and the steel lattice girder 100. Compared with the conventional extension hanger, it does not need to destroy the original structure of the steel lattice girder 100. Compared with the pin-type hanger, it can reduce the workload of temporary welding on site, saving labor costs and working time. The upper support rod 41 and the lower support rod 43 can provide support for the upper crossbeam 21 and the lower crossbeam 23 during the lifting process. When lifting heavy steel lattice girders, they can effectively prevent the upper crossbeam 21 and the lower crossbeam 23 from being deformed by force, thereby ensuring that the upper crossbeam 21 and the lower crossbeam 23 provide a stable clamping force for the steel lattice girder 100.

[0071] The above-mentioned steel lattice beam hoist has a plurality of first mounting holes 11 spaced apart along the length direction on the main beam 1, and a plurality of second mounting holes 281 spaced apart along the length directions of the upper crossbeam 21 and the lower crossbeam 23. When in use, the positions of the upper crossbeam 21 and the lower crossbeam 23 can be adjusted in the horizontal and vertical directions by plugging the fixing parts into the first mounting holes 11 and the second mounting holes 281 at different positions to adapt to the hoisting of steel lattice beams with different beam heights and different cantilever hoisting states, so that the above-mentioned steel lattice beam hoist has universality and there is no need to design a specific hoist for steel lattice beams of different sizes.

[0072] The above-mentioned steel lattice girder hoist and hoisting method can prevent the steel lattice girder hoist from moving upward on the cross bridge during the hoisting process by arranging the tensioning steel strands on the steel lattice girder hoist at opposite ends of the steel lattice girder, thereby improving the safety of the hoisting.

[0073] The above-mentioned steel lattice beam hoist has sleepers 94 padded between the upper crossbeam 21, the lower crossbeam 23 and the steel lattice beam 100, which can further improve the clamping degree of the upper crossbeam 21, the lower crossbeam 23 and the steel lattice beam 100 and reduce the wear on the steel lattice beam 100 and the hoist during the lifting process.

[0074] The upper crossbeam 21 and the lower crossbeam 23 of the above-mentioned steel lattice beam hanger further include a sealing plate 20. The sealing plate 20 connects the corresponding two beam plates 25, which can further improve the strength of the upper crossbeam 21 and the lower crossbeam 23 and prevent them from being deformed by stress.

[0075] The above-mentioned steel lattice beam hoisting method first hoists the upper crossbeam 21 to the top surface of the steel lattice beam 100, then assembles the structure composed of the lower crossbeam 23, the main beam 11 and the lower support rod 46, and then hoists the assembled structure to the vicinity of the steel lattice beam 100 and connects it to the upper crossbeam 21. Compared with the method of first assembling the steel lattice beam hoist and then hoisting it, it can reduce the time of adjusting the hoist posture at high altitude and is more convenient for hoisting.

[0076] The above-mentioned steel lattice beam hoist is mainly used for lifting lattice beams with larger spans of main bridges. Compared with previous lattice beam installation processes, it is suitable for the installation of beams with different lengths and heights without destroying the original structure. The hoist can be used multiple times, saving production costs, while reducing the workload of temporary welding on site, saving labor costs and working time.

[0077] It is understandable that in other embodiments, the lifting lugs 7 may be installed only on the main beam 1 or the upper cross beam 21 .

[0078] It is understandable that the upper support rod 41 and the lower support rod 43 can adopt telescopic rods with different structures, and their structures are not limited to this embodiment. For example, they can adopt telescopic rods with other structures in the prior art.

[0079] The above description is a detailed description of the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. Any equivalent changes or modifications completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A steel lattice beam hanger, characterized in that: The invention comprises a main beam (1), an upper cross beam (21), a lower cross beam (23), an upper support rod (41) and a lower support rod (43), wherein the main beam (1) is arranged vertically, the upper cross beam (21) and the lower cross beam (23) are arranged horizontally, the upper cross beam (21) is located above the lower cross beam (23), the upper cross beam (21) and the lower cross beam (23) are connected to the main beam (1), and an installation space (6) for inserting one end of a steel lattice beam is formed between the upper cross beam (21), the lower cross beam (23) and the main beam (1); the upper cross beam (21) and / or the lower cross beam (23) are arranged horizontally, and the upper cross beam (21) and the lower cross beam (23) are arranged horizontally. An anchor for installing a tensioning steel strand is provided on the crossbeam (23); the upper support rod (41) is located on a side of the upper crossbeam (21) facing away from the lower crossbeam (23), and opposite ends of the upper support rod (41) are respectively connected to the upper crossbeam (21) and the main beam (1); the lower support rod (43) is located on a side of the lower crossbeam (23) facing away from the upper crossbeam (21), and opposite ends of the lower support rod (43) are respectively connected to the lower crossbeam (23) and the main beam (1); a lifting lug (7) is installed on the main beam (1) and / or the upper crossbeam (21); One end of the upper crossbeam (21) and one end of the lower crossbeam (23) are detachably connected to the main beam (1) via a fixing member; a plurality of first mounting holes (11) are provided at intervals along the length direction of the main beam (1); a plurality of second mounting holes (281) are provided at intervals along the length direction of the upper crossbeam (21) and the lower crossbeam (23); the fixing member is provided through part of the first mounting holes (11) and part of the second mounting holes (281); The upper support rod (41) and the lower support rod (43) are both telescopic rods, one end of the upper support rod (41) is hinged to the main beam (1), and the end of the upper support rod (41) away from the main beam (1) is detachably connected to the upper cross beam (21) via a first hinge (81); one end of the lower support rod (43) is hinged to the main beam (1), and the end of the lower support rod (43) away from the main beam (1) is detachably connected to the lower cross beam (23) via a second hinge (82); The upper crossbeam (21) is provided with a plurality of first fixing holes (291) at intervals along the length direction, and the first hinge (81) is detachably connected to the first fixing hole (291) at a preset installation position via a first connecting member; the lower crossbeam (23) is provided with a plurality of second fixing holes (292) at intervals along the length direction, and the second hinge (82) is connected to the second fixing hole (292) at the preset installation position via a second connecting member.

2. The steel lattice beam hanger according to claim 1, characterized in that: The upper crossbeam (21) and the lower crossbeam (23) each include two parallel and spaced beam plates (25) and a fixing seat (26) fixed to one end of the two beam plates (25), a plug-in slot (27) is formed between the two beam plates (25), and the upper crossbeam (21) and the lower crossbeam (23) are sleeved on the main beam (1) through the corresponding plug-in slot (27); the second mounting hole (281) is provided on the beam plate (25), the first fixing hole (291) is provided on the beam plate (25) of the upper crossbeam (21); the second fixing hole (292) is provided on the beam plate (25) of the lower crossbeam (23); the anchor includes an upper anchor (22) and a lower anchor (24), the fixing seat (26) of the upper crossbeam (21) is provided with the upper anchor (22); the fixing seat (26) of the lower crossbeam (23) is provided with the lower anchor (24).

3. The steel lattice beam hanger according to claim 2, characterized in that: The upper crossbeam (21) and the lower crossbeam (23) each further include at least one sealing plate (20), wherein the sealing plate (20) is detachably connected to the top and / or bottom of two corresponding beam plates (25).

4. The steel lattice beam hanger according to claim 2, characterized in that: Each beam plate (25) includes a main plate (28) and two flange plates (29), the main plates (28) of the two beam plates (25) are arranged in parallel and spaced apart to enclose the plug-in slot (27), the two flange plates (29) are respectively fixed to the top and bottom of the corresponding main plate (28), and are vertically connected to the side of the corresponding main plate (28) facing away from the plug-in slot (27); the two main plates (28) of the upper crossbeam (21) and the two main plates (28) of the lower crossbeam (23) are both provided with the second mounting holes (281); the two flange plates (29) of the upper crossbeam (21) are both provided with the first fixing holes (291), and the two flange plates (29) of the lower crossbeam (23) are both provided with the second fixing holes (292); the fixing seat (26) is passed through the plug-in slot (27) and fixedly connected to the flange plates (29) of the corresponding two beam plates (25).

5. The steel lattice beam hanger according to claim 1, characterized in that: The upper support rod (41) and the lower support rod (43) each include a first screw rod (44), a second screw rod (45) and an adjusting sleeve (46), wherein the first end of the first screw rod (44) is hinged to the main beam (1), and the second end of the first screw rod (44) is provided with a first external thread; the first end of the second screw rod (45) of the upper support rod (41) is rotatably connected to the upper cross beam (21), and the first end of the second screw rod (45) of the lower support rod (43) is rotatably connected to the lower cross beam (23); the second end of the second screw rod (45) is provided with a second external thread, and the second external thread has a rotation direction opposite to that of the first external thread; the adjusting sleeve (46) is sleeved on the second end of the corresponding first screw rod (44) and the second end of the corresponding second screw rod (45), and is threadedly connected to the second end of the corresponding first screw rod (44) and the second end of the corresponding second screw rod (45).

6. The steel lattice beam hanger according to claim 2, characterized in that: The steel lattice beam hanger further comprises a first pair of tension steel strands (91) installed at the upper anchor opening (22) and a second pair of tension steel strands (92) installed at the lower anchor opening (24).

7. A method for hoisting a steel lattice beam, characterized in that: The following steps are involved: S1, at least one steel lattice beam hanger as claimed in claim 1 is installed at the opposite ends of the steel lattice beam, so that the opposite ends of the steel lattice beam are respectively inserted into the installation space (6) of the steel lattice beam hanger at the corresponding end, and the upper crossbeam (21) and the lower crossbeam (23) cooperate with each other to clamp the steel lattice beam at the corresponding end, and the opposite ends of the upper support rod (41) are respectively against the side of the main beam (1) and the upper crossbeam (21) facing away from the installation space (6), and the opposite ends of the lower support rod (43) are respectively against the side of the main beam (1) and the lower crossbeam (23) facing away from the installation space (6); S2, tensioning the tensioning steel strands at the anchor openings of the two steel lattice girder hangers at opposite ends of the steel lattice girder; S3, connecting a cable to the lifting lug (7) of the steel lattice beam hoist to lift the steel lattice beam.

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