CN221318898U - Hoisting device for prefabricated box girder - Google Patents

Abstract

The utility model relates to the technical field of box girder hoisting, in particular to a hoisting device for prefabricating a box girder, which comprises a hoisting girder placed on the upper surface of the box girder and two corner protection components attached to corners of the bottom of the box girder, wherein the hoisting girder comprises a main girder and clamping plates arranged on two sides of the main girder, a plurality of limit holes which are symmetrically arranged are formed in the side surfaces of two ends of the main girder, through holes corresponding to the limit holes are formed in the clamping plates, and positioning bolts penetrate through the limit holes and the through holes to fix the clamping plates on the main girder. The utility model can effectively prevent the extrusion damage to the box girder during hoisting and solve the problem of insufficient locking effect to the box girder during hoisting.

Description

Hoisting device for prefabricated box girder

Technical Field

The utility model relates to the technical field of box girder hoisting, in particular to a hoisting device for a prefabricated box girder.

Background

The bridge engineering middle beam has hollow inside and flanges on two sides of the upper part, and is similar to a box, so that the bridge engineering middle beam has the name of single box, multiple boxes and the like. The box girder of the reinforced concrete structure is divided into a prefabricated box girder and a cast-in-situ box girder. The box girder combined bridge girder erection machine prefabricated in the independent place can be erected after the lower engineering is completed, so that the engineering progress can be accelerated, and the construction period can be saved; cast-in-situ box girders are mostly used for large continuous bridges. The materials are commonly divided into two types, namely a prestressed reinforced concrete box girder and a steel box girder. The prestressed reinforced concrete box girder is constructed on site, and besides longitudinal prestress, transverse prestress is arranged on some of the prestressed reinforced concrete box girders; the steel box girder is generally processed in a factory and then transported to a site for installation, and has an all-steel structure and also has a part of reinforced concrete pavement layers.

The prefabricated box girder is required to be hoisted through the steel wire rope in the installation process and then hoisted to a specified position for installation, however, the traditional steel wire rope is too sharp at the corner edge of the prefabricated box girder on the one hand in the hoisting process, so that the pressure and abrasion to the steel wire rope are large in the hoisting process, and the protection force to the steel wire rope is poor. The steel wire rope can scratch the flange or the bottom plate corner of the box girder, so that the use quality of the box girder is affected. On the other hand, the locking effect of the hoisting of the box girder by using the steel wire rope is insufficient, the problem of box girder sliding possibly occurs, and huge potential safety hazards exist in the hoisting process.

Disclosure of utility model

In order to solve the problems in the prior art, the utility model provides a hoisting device for a prefabricated box girder, which can effectively prevent the box girder from being extruded and damaged during hoisting and solve the problem of insufficient locking effect on the box girder during hoisting.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a hoist device of prefabricated case roof beam, includes the hoist and mount roof beam of placing at case roof beam upper surface and laminating in two angle bead subassemblies of case roof beam bottom corner, the hoist and mount roof beam includes the girder, installs the splint in the girder both sides, the spacing hole that the several symmetry set up has been seted up to girder both ends side, the through-hole that corresponds with spacing hole has been seted up to the splint, and positioning bolt passes spacing hole and through-hole are fixed splint on the girder.

By adopting the structural design, the lifting beam can adjust the distance between the two clamping plates according to the size of the box beam, so that the flanges at the two ends of the box beam are locked, the box beam can be stably fixed and grabbed during lifting, the applicability of the device is improved, and the box beam is effectively prevented from sliding off in the lifting process to cause huge potential safety hazards.

Preferably, the corner protection assembly comprises two semicircular corner protection plates rotationally connected through a rotating shaft, and a first rubber pad is arranged on the plane of each semicircular corner protection plate.

By adopting the structural design, the edge of the hoisting rope and the edge of the box girder are separated by the corner protector assembly, so that the hoisting rope is prevented from directly contacting the box girder, the abrasion and the pressure to the hoisting rope are reduced, and the protection force to the hoisting rope during hoisting is improved. Meanwhile, the damage of hoisting ropes to the corners of the box girder in the hoisting process is avoided.

Preferably, the outer side walls of the clamping plates and the semicircular corner protection plates are provided with limiting grooves.

By adopting the structural design, the limiting groove enables the hoisting rope to be better fixed in the clamping plate and the semicircular corner protection plate, and the hoisting rope is prevented from being moved in the hoisting process to cause unstable hoisting.

Preferably, the shape of splint is the U-shaped, the corner of splint is the fillet, splint laminating is in the edge of a wing of case roof beam, the one side that the flange was pressed close to splint is provided with the second cushion.

By adopting the structural design, the rubber pad is arranged to prevent the clamping plate and the corner protection component from extruding and wearing the box girder in the hoisting process, so that the friction force is increased, the hoisting effect can be better supported, and the corner of the clamping plate is designed to be a round corner, so that the hoisting rope is protected from being broken by the clamping plate in the process of contact of the clamping plate.

Compared with the prior art, the utility model has the beneficial effects that:

The lifting beam can adjust the distance between the two clamping plates according to the size of the box beam, so that flanges at two ends of the box beam are locked, the box beam can be stably fixed and grabbed during lifting, the applicability of the device is improved, and the box beam is effectively prevented from sliding down in the lifting process to cause huge potential safety hazards. The edge of the hoisting rope and the edge of the box girder are separated by the corner protector assembly, so that the hoisting rope is prevented from directly contacting the box girder, the abrasion and the pressure to the hoisting rope are reduced, and the protection force to the hoisting rope during hoisting is improved. Meanwhile, the damage of hoisting ropes to the corners of the box girder in the hoisting process is avoided.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the assembled structure of the present utility model;

FIG. 3 is a cross-sectional view of the spacing mechanism of the present utility model;

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

Fig. 5 is a cross-sectional view of the locking assembly of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the present utility model provides a technical solution: the utility model provides a hoist device of prefabricated case roof beam, includes the hoist and mount roof beam 1 of placing at case roof beam 3 upper surface and laminating in two angle bead subassemblies 2 of case roof beam 3 bottom corners, hoist and mount roof beam 1 includes girder 101, installs splint 104 in girder 101 both sides, girder 101 is formed the cuboid by four steel sheet welding, and girder 101's length is greater than the distance between two pterygoid lamina of case roof beam 3. The side surfaces of the front end and the rear end of the main beam 101 are provided with a plurality of limit holes 102 which are symmetrically arranged, the clamping plate 104 is provided with two through holes corresponding to the limit holes 102, and two positioning bolts 103 penetrate through the limit holes 102 and the through holes. The lifting beam 1 can adjust the distance between the two clamping plates 104 according to the size of the box beam 3, so that flanges at two ends of the box beam 3 are locked, the box beam 3 can be stably fixed and grabbed during lifting, the applicability of the device is improved, and huge potential safety hazards caused by sliding of the box beam in the lifting process of the box beam 3 are effectively prevented.

The corner protector assembly 2 comprises two semicircular corner protector plates 201 which are rotatably connected through a rotating shaft 203, and a first rubber pad 202 is arranged on the plane of each semicircular corner protector plate 201. The edges of the hoisting ropes 4 and the box girder 3 are separated by the corner protector assembly 2, so that the hoisting ropes 4 are prevented from directly contacting the box girder 3, the abrasion and the pressure to the hoisting ropes 4 are reduced, and the protection force to the hoisting ropes 4 during hoisting is improved. Meanwhile, the damage of the hoisting rope 4 to the corners of the box girder 3 in the hoisting process is avoided.

The outer side walls of the clamping plate 104 and the semicircular corner protecting plate 201 are provided with two limiting grooves 105, and the two limiting grooves 105 are parallel to each other. The limiting groove 105 enables the hoisting rope 4 to be better fixed in the clamping plate 104 and the semicircular corner protection plate 201, and the hoisting instability caused by the movement of the hoisting rope 4 in the hoisting process is prevented.

The clamping plate 104 is U-shaped, the clamping plate 104 is attached to the flange of the box girder 3, and a second rubber pad 106 is arranged on one surface, close to the flange, of the clamping plate 104. The arrangement of the rubber pad avoids the extrusion and abrasion of the clamping plate 104 and the corner protection component 2 to the box girder 3 in the hoisting process, increases the friction force and can better bear the hoisting effect.

Working principle: the operator firstly places the corner protector assembly 2 at the middle position of the corner of the bottom of the box girder 3, then places the lifting girder 1 at the middle position of the upper surface of the box girder 3, and adjusts the distance between the two clamping plates 104 on the lifting girder 1 through the distance between the two flanges of the box girder 3, so that the side surfaces of the clamping plates 104 are tightly attached to the flanges of the box girder 3, thereby fixing the lifting girder 1 on the box girder 3. Two hoisting ropes 4 are taken to pass through grooves of the clamping plates 104 and the semicircular corner protection plates 201, and then the gantry crane is used for hoisting the box girder 3. The device ensures that the box girder 3 can be stably fixed and grabbed during hoisting, and effectively prevents the box girder 3 from sliding off in the hoisting process to cause huge potential safety hazards. The edges of the hoisting ropes 4 and the box girder 3 are separated by the corner protector assembly 2, so that the hoisting ropes 4 are prevented from directly contacting the box girder 3, the abrasion and the pressure to the hoisting ropes 4 are reduced, and the protection force to the hoisting ropes 4 during hoisting is improved. Meanwhile, the damage of the hoisting rope 4 to the corners of the box girder 3 in the hoisting process is avoided.

What is not described in detail in this specification is prior art known to those skilled in the art. Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims (4)

1. Hoist device of prefabricated case roof beam, its characterized in that: including placing hoist and mount roof beam (1) at roof beam (3) upper surface and laminating in two corner protection subassemblies (2) of roof beam (3) bottom corner, hoist and mount roof beam (1) include girder (101), install splint (104) in girder (101) both sides, spacing hole (102) that several symmetry set up have been seted up to girder (101) both ends side, through-hole that corresponds with spacing hole (102) has been seted up to splint (104), and locating bolt (103) pass spacing hole (102) and through-hole are fixed splint (104) on girder (101).

2. The hoisting device for a precast box girder according to claim 1, characterized in that: the corner protector assembly (2) comprises two semicircular corner protector plates (201) which are rotationally connected through a rotating shaft (203), and a first rubber pad (202) is arranged on the plane of each semicircular corner protector plate (201).

3. The hoisting device for a prefabricated box girder according to claim 2, wherein: limiting grooves (105) are formed in the outer side walls of the clamping plates (104) and the semicircular corner protection plates (201).

4. The hoisting device for a precast box girder according to claim 1, characterized in that: the shape of splint (104) is the U-shaped, the corner of splint (104) is the fillet, splint (104) laminating are in the edge of a wing of roof beam (3), the one side that splint (104) pressed close to the edge of a wing is provided with second cushion (106).