CN219669926U

CN219669926U - Harmless hoist and mount hoist

Info

Publication number: CN219669926U
Application number: CN202321041036.5U
Authority: CN
Inventors: 吴亚东; 丁锐; 杨天阳; 王辉
Original assignee: China Railway Baoji Bridge Group Co Ltd; China Railway Baoji Bridge Yangzhou Co Ltd
Current assignee: China Railway Baoji Bridge Group Co Ltd; China Railway Baoji Bridge Yangzhou Co Ltd
Priority date: 2023-05-05
Filing date: 2023-05-05
Publication date: 2023-09-12
Anticipated expiration: 2033-05-05

Abstract

The utility model discloses a nondestructive lifting sling, which can realize the nondestructive lifting of a top plate unit to a steel box girder by designing special positioning, fixing and other functions, avoid the damage of a welding temporary lifting lug to the plate unit and the influence on the appearance of a product in the traditional method, ensure the appearance and the size requirement of the product after lifting, reduce the procedures of welding the lifting lug and removing the lifting lug, and improve the production efficiency. The lifting device can be used for lifting the steel box girder top plate unit, and is simple in structure and convenient to use.

Description

Harmless hoist and mount hoist

Technical Field

The utility model relates to the field of lifting appliances, in particular to a nondestructive lifting appliance.

Background

At present, the length of a single girder section designed and divided by a steel box girder of a large-span suspension bridge is about 18 meters, the thickness of a top plate is 18mm, the thickness of a U rib plate of the top plate is 8mm, and the weight of a top plate unit can reach about 30 tons. Because the steel box girder is constructed by adopting a normal installation method in the general assembly process, the top plate unit is required to ensure that the rib-free side faces upwards and the rib-free side faces downwards during hoisting. The traditional hoisting mode needs to weld at least 4 temporary lifting lugs on a rib-free side panel for hoisting operation, after hoisting is completed, the lifting lugs are subjected to flame cutting, gouging, polishing, trimming and flaw detection procedures, the lifting lugs are required to be frequently welded and cut on finished components, parent metals are easy to damage, surface defects with different depths are generated, and the machining defects of steel materials are definitely required in the existing steel structure manufacturing standard and specification, such as the specification in the railway steel bridge manufacturing Specification Q/CR 9211-2015: when the depth is 0.3 mm-1 mm, the polishing is uniform, and when the depth exceeds 1mm, the polishing is uniform after repair welding, so that the construction cost is increased, and the construction efficiency is reduced. The traditional hoisting mode not only increases material cost and labor cost, but also consumes a great deal of time.

Because roof unit weight is heavier, adopts the hoist of other forms to all can inevitably lead to the fact the card trace on the board unit, causes even that the panel warp, influences straightness accuracy and the planarization of board unit, still need increase the process of flame correction to excessive deformation, has also influenced the construction progress.

Disclosure of Invention

The utility model aims to: the lifting appliance for the nondestructive lifting of the top plate unit can realize nondestructive installation and can effectively control the deformation of the plate unit in the lifting process.

The technical scheme is as follows: the utility model relates to a nondestructive lifting appliance, which comprises a top plate unit and a lifting appliance component, wherein the top plate unit comprises a bridge deck plate and two U-shaped ribs connected with the same surface of the bridge deck plate side by side; the lifting appliance assembly is positioned between the two U ribs and comprises a web plate, two connecting plates, lifting lug plates and a backing plate, wherein the two connecting plates are respectively connected to two ends of the web plate; the lifting lug plate is connected with the web plate, one surface of the backing plate is supported and fixed at the middle position of the bridge deck, and the other surface of the backing plate is simultaneously connected with the web plate and the lifting lug plate; the two connecting plates are respectively connected with the two U-shaped ribs.

Preferably, the bridge deck is welded and fixed with the U-ribs.

Preferably, the connecting plate and the U-rib are fixedly connected by bolts.

Preferably, the lifting lug plate is provided with a through hole.

Preferably, the backing plate is closely adhered to the bridge deck.

Preferably, the hanger assemblies are four and are distributed at four corners of the top plate unit.

Preferably, the profile and dimensions of the web are determined by the spacing, height and bipole angle of the U-ribs.

The beneficial effects are that:

(1) According to the utility model, the bolt holes on the U ribs of the top plate are utilized to complete the assembly of the lifting appliance assembly and the plate unit, welding or re-punching on the plate unit is not needed, the nondestructive installation of the lifting appliance assembly is realized, the subsequent grinding and flaw detection procedures can be simplified, and the working efficiency is improved.

(2) According to the utility model, the backing plate is welded with the lifting lug plate and the web plate, and the planeness of the top plate unit is ensured by using one backing plate to bear the dead weight of the plate unit; and meanwhile, the web plate and the connecting plate are utilized to carry out external rigid support on the U-shaped rib, so that the deformation of the U-shaped rib in the hoisting process is effectively controlled, the subsequent thermal correction process is simplified, and the corresponding work efficiency is improved.

(3) The whole set of tool is basically connected by adopting the bolts and the shackles, is convenient to detach and is beneficial to repeated use, and a set of efficient and practical standardized tool is provided for hoisting the top plate unit.

Drawings

FIG. 1 is a diagram of the overall construction of a tooling;

FIG. 2 is a front view of the present utility model;

FIG. 3 is a left side view of the present utility model;

FIG. 4 is a top view of the present utility model;

FIG. 5 is a partial enlarged view of position I of FIG. 3;

FIG. 6 is a chart showing the pattern of holes in the U-shaped rib group at position II in FIG. 4.

Detailed Description

Example 1: referring to fig. 1, an example is a set of nondestructive hoisting tool used for total splicing and hoisting of a steel box girder by an 18-meter long top plate unit (in the use process, four corners of the plate unit are respectively provided with a set of hoisting tool components as shown in fig. 2-4, only one set of hoisting tool component is shown in the drawing; the top plate unit is a single element welded by a bridge deck 5 and a U rib 6, and phi 26 bolt holes are drilled at two ends of the U rib 6 as shown in fig. 6).

The lifting tool assembly shown in fig. 5 is composed of a web plate 1, two connecting plates 2, a lifting lug plate 3 and a backing plate 4, wherein the two connecting plates 2 are welded with the web plate 1 through double-sided 6mm fillet welds, the outline size of the web plate 1 is determined according to the distance and the height of the U ribs 6 on the top plate unit and the angles of the two limbs, so that the connecting plates can be closely attached to the U ribs 6 after the lifting tool assembly is installed, phi 26 through holes (the positioning size of holes is also obtained through lofting) are formed in the connecting plates 2, and the connecting plates are fastened and connected with the U ribs on the top plate unit through bolts.

The lifting lug plate 3 is welded with the web plate through double-sided 6mm fillet welds, and phi 26 through holes are formed in the lifting lug plate 3 and are used for shackle installation or wire rope installation. The backing plate 4 is welded with the web plate 1 and the lifting lug plate 3 through double-sided 6mm fillet welds, after the lifting appliance component is installed, the backing plate 4 and the top plate unit can be closely attached, vertical pressure in the lifting process is mainly born, and deformation of the panel is reduced.

The method for using the top plate to nondestructively hoist the lifting appliance comprises the following steps:

the lifting appliance components are placed between two limbs of the U-shaped ribs 6 at four corners of the top plate unit, so that the backing plate 4 is closely attached to the bridge deck 5, and the connecting plate 2 is closely attached to the two limbs of the U-shaped ribs 6.

And fine-tuning the position of the lifting appliance assembly, aligning the bolt holes on the connecting plate 2 with the bolt holes on the U-shaped ribs 6, and bolting and fastening by using M24 bolts.

The shackle or the steel wire rope passes through the through hole on the lifting lug plate 3 and is fastened, so that the lifting operation can be performed.

It should be noted that: the methods involved in the present utility model are merely illustrative of the application of the present utility model and are not intended to be within the scope of the claimed utility model. And will not be described in any greater detail.

It should be understood that: although the above embodiments describe the design concept of the present utility model in more detail, these descriptions are merely descriptions of the design concept of the present utility model, and not limitations on the design concept of the present utility model, and any combination, addition or modification not exceeding the design concept of the present utility model falls within the scope of the present utility model.

Claims

1. The nondestructive lifting sling is characterized by comprising a top plate unit and a lifting sling assembly, wherein the top plate unit comprises a bridge deck (5) and two U-shaped ribs (6) which are connected with the same surface of the bridge deck (5) side by side; the lifting appliance assembly is positioned between the two U ribs (6) and comprises a web plate (1), two connecting plates (2), lifting lug plates (3) and a backing plate (4), wherein the two connecting plates (2), the lifting lug plates (3) and the backing plate (4) are respectively connected to two ends of the web plate (1); the lifting lug plate (3) is connected with the web plate (1), one surface of the backing plate (4) is supported and fixed at the middle position of the bridge deck (5), and the other surface of the backing plate is simultaneously connected with the web plate (1) and the lifting lug plate (3); the two connecting plates (2) are respectively connected with the two U-shaped ribs (6).

2. A non-destructive lifting appliance according to claim 1, wherein the deck slab (5) is welded to the U-rib (6).

3. The non-destructive lifting appliance according to claim 1, wherein the connection plate (2) and the U-rib (6) are fixedly connected by means of bolts.

4. The lossless lifting sling according to claim 1, wherein the lifting lug plate (3) is provided with through holes.

5. A non-destructive hoist spreader according to claim 1, characterized in that the pad (4) is in close proximity to the bridge deck (5).

6. The non-destructive lift spreader of claim 1, wherein the spreader assembly has four and is distributed at four corners of the top plate unit.

7. A non-destructive lifting sling according to claim 1, characterised in that the profile and dimensions of the web (1) are determined in accordance with the spacing, height and angle of the limbs between the U-ribs (6).