CN220811572U - Lifting appliance for lifting steel box girder - Google Patents

Abstract

The utility model relates to the technical field of lifting appliances, in particular to a lifting appliance for lifting a steel box girder. Comprising the following steps: the two ends of the cross beam are provided with mounting parts, and the middle part of the cross beam is provided with clamping pieces connected with the lifting device; the fixing assembly is symmetrically arranged on one side of the mounting part respectively and comprises an upper support plate and a lower support plate; the upper support plate is connected with the mounting part through a steel cable, and the lower part is connected with the lower support plate through bolts, so that the steel box girder is fixed; the utility model increases the contact area with the surface of the steel box girder, thereby effectively increasing the stress intensity in the lifting process, avoiding the loosening condition, and shortening the length of the steel cable by directly connecting the mounting part with the fixing component through the steel cable, being beneficial to the lifting of the stability and having reasonable overall layout.

Description

Lifting appliance for lifting steel box girder

Technical Field

The utility model relates to the technical field of lifting appliances, in particular to a lifting appliance for lifting a steel box girder.

Background

In steel box girder construction, the box is transported to the construction site by the mill, promotes to pier top through suspending afterwards, accomplishes the concatenation operation, in suspending in, need utilize the hoist to realize the connection to steel box girder generally, at present, current hoist adopts the lug form or directly adopts the cable wire to tie around the form to connect, can't guarantee fixed position's accuracy, the fixed form of lug single point often needs to install more simultaneously to increase the reliability of connection, cause the cable wire to be disordered, the construction degree of difficulty increases, in suspending the in-process, still has winding condition, is unfavorable for steady suspension.

Disclosure of utility model

The utility model aims to solve the technical problems, and provides the lifting appliance for lifting the steel box girder, which increases the contact area with the surface of the steel box girder, so that the stress intensity in the lifting process is effectively increased, the loosening condition is avoided, the mounting part is directly connected with the fixing component through the steel rope, the length of the steel rope is shortened, the lifting stability is facilitated, and the whole layout is reasonable.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

The two ends of the cross beam are provided with mounting parts, and the middle part of the cross beam is provided with clamping pieces connected with the lifting device;

the fixing assembly is symmetrically arranged on one side of the mounting part respectively and comprises an upper support plate and a lower support plate; the upper support plate is connected with the installation part through a steel cable, and the lower part is connected with the lower support plate through bolts, so that the steel box girder is fixed.

Preferably, the upper support plate is provided with a first roller; the second idler wheels matched with the first idler wheels are arranged on the mounting portions.

Preferably, the lower support plates are used in pairs, and two adjacent lower support plates are connected through bolts.

Preferably, the cross beam is provided with an adjusting device connected with the mounting part, and the mounting part can be driven to be adjusted along the length direction of the cross beam through the adjusting device.

Preferably, the end part of the cross beam is provided with a limit hole; the adjusting device comprises an adjusting rod and a sliding block; the two ends of the adjusting rod are connected with the cross beam; the sliding block is located below the limiting hole and is in threaded connection with the adjusting rod, and the sliding block is provided with a plurality of threaded holes.

Preferably, a guide block is arranged on one side of the sliding block, and a sliding groove matched with the guide block is arranged on the cross beam.

Preferably, the guide block is rectangular or dovetail-shaped.

Preferably, a plurality of through holes are formed at one end of the cross beam at equal intervals.

Compared with the prior art, the utility model has the following advantages:

1. The upper support plate and the lower support plate are respectively contacted with the upper surface and the inner wall of the steel box girder and are fixed by bolts, so that the contact area with the steel box girder is effectively increased, the stress intensity and the stability are improved, the integral installation is simpler, no special structural design is needed, and the applicability is wide;

2. The installation part is connected with the fixing component through the steel cable, and the length of the steel cable can be adjusted according to the bridge conditions, so that the function of controlling the height between the installation part and the fixing component is achieved, the installation and the use of different bridge deck conditions are met, and the installation precision requirement between the installation part and the fixing component is reduced by utilizing the flexible characteristic of the steel cable;

3. through design through-hole or adopt adjusting device's form, can realize the adjustment to installation department position, in the installation, can carry out lateral displacement according to the circumstances to guarantee that the cable wire between installation department and the fixed subassembly is in vertical tensioning state, reduce installation accuracy and construction degree of difficulty.

Drawings

FIG. 1 is a schematic diagram of the installation of a steel box girder lifting sling;

FIG. 2 is a schematic diagram of the overall structure;

FIG. 3 is a schematic view of a cable connection between a mounting portion and a securing assembly;

FIG. 4 is a schematic view of a beam structure;

FIG. 5 is a schematic view of an adjusting device;

Fig. 6 is a slider part view.

In the figure: 1. a cross beam; 2. a mounting part; 3. a clamping piece; 4. a fixing assembly; 5. an adjusting device; 101. a limiting hole; 102. a chute; 103. a through hole; 201. a second roller; 401. an upper support plate; 402. a lower support plate; 403. a first roller; 501. an adjusting rod; 502. a slide block; 503. a threaded hole; 504. and a guide block.

Detailed Description

The objects, technical solutions and advantages of the present utility model will become more apparent by the following detailed description of the present utility model with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

The first embodiment is as follows: referring to fig. 1 to 6, a steel box girder lifting sling includes: the beam 1, both ends of the beam 1 are provided with mounting parts 2, the middle part is provided with clamping pieces 3 connected with the lifting device, and meanwhile, the clamping pieces 3 are connected with the beam 1 through rotating shafts; the fixing assembly 4 is symmetrically arranged on one side of the mounting part 2 respectively, and the fixing assembly 4 comprises an upper support plate 401 and a lower support plate 402; the upper support plate 401 is connected with the installation part 2 through a steel cable, and the lower part is connected with the lower support plate 402 through bolts, so that the steel box girder is fixed;

During installation, the upper support plate 401 is placed at the hole site on the upper surface of the steel box girder, then a plurality of lower support plates 402 are placed in the steel box girder and are positioned below the upper support plates 401, bolts penetrate through the hole site to clamp the upper support plates 401 and the lower support plates 402, fixing is completed, a plurality of groups of fixing components 4 are installed through the steps, steel ropes on lifting devices are connected with clamping pieces 3, if the steel ropes are bound in the clamping pieces 3, or the steel ropes are tightly pressed by a plurality of pressing plates, then the lifting devices are started, the positions of the cross beams 1 are adjusted to the positions above the fixing components 4, annular steel ropes on the installation parts 2 are sleeved into the upper support plates 401, then the lifting devices are lifted, hanging operation can be carried out at the tightening positions, the installation is simple and convenient, the problem of traditional multi-point installation is solved, and lifting is stable and reliability is high after the lifting lugs are integrally connected.

In a preferred embodiment, as shown in fig. 3, a first roller 403 is provided on the upper support plate 401; the two sides of the installation part 2 are respectively provided with the second roller 201 matched with the first roller 403, the roller is connected with the steel cable, the steel cable is prevented from being broken due to the right angle and other conditions, the reliability is improved, and the roller is adopted, so that the steel cable is convenient to sleeve and operate; wherein the first rollers 403 on the upper support plate 401 may be used in pairs.

In the preferred embodiment, as shown in fig. 2, the lower support plates 402 are used in pairs, so that the contact surface with the steel box girder is increased, the fixing strength is improved, and meanwhile, two adjacent lower support plates 402 are connected through bolts, so that the connection and the fixation can be realized by attaching to the self structure of the steel box girder, and the operation is convenient; the cross-section of the lower support plate 402 is L-shaped, and the number of the lower support plates 402 can be adjusted according to the situation, for example, four, six, etc., and the specifications of the upper support plate 401 are correspondingly adjusted.

Detailed description of the preferred embodiments

Referring to fig. 4-6, an adjusting device 5 connected with the mounting part 2 is arranged on the cross beam 1, and the mounting part 2 can be driven to adjust along the length direction of the cross beam 1 by the adjusting device 5, so that the mounting operation is convenient, the position of the mounting part 2 is finely adjusted, and the steel cable is ensured to be in a proper tensioning state;

Firstly, corresponding limiting holes 101 are respectively arranged at the end parts of the cross beam 1, the limiting holes 101 can be rectangular or key-shaped, a screw displacement space is reserved, and the adjusting device 5 comprises an adjusting rod 501 and a sliding block 502; two ends of the adjusting rod 501 are connected with the cross beam 1 through a bracket, the adjusting rod 501 can rotate, the sliding block 502 is positioned below the limiting hole 101, the upper surface of the sliding block contacts with the edge of the cross beam 1, the lower part of the sliding block is in threaded connection with the adjusting rod 501, and a plurality of threaded holes 503 are formed in the sliding block 502 and used for fixing the mounting part 2;

During adjustment, the screw connected with the threaded hole 503 on the mounting part 2 is loosened, then the adjusting rod 501 is rotated, the sliding block 502 is pushed to displace by using the threaded connection between the sliding block 502 and the adjusting rod 501, and the position adjustment of the mounting part 2 is realized, so that the operation is simple.

In a preferred embodiment, in order to improve stability of the slider 502 after installation, as shown in fig. 5 and 6, a guide block 504 is disposed on one side of the slider 502, a sliding groove 102 matched with the guide block 504 is disposed on the cross beam 1, and the sliding groove 102 is slidably connected with the guide block 504, so that stability during displacement can be effectively improved, meanwhile, acting force of the slider 502 on the adjusting rod 501 is reduced, and bending of the adjusting rod 501 is prevented.

In a preferred embodiment, the guide block 504 may be rectangular or dovetail-shaped, which may meet the displacement guiding requirements.

Detailed description of the preferred embodiments

Other ways of adjusting the mounting part 2

As shown in fig. 2, through a plurality of through holes 103 are formed at one end of the edge of the cross beam 1 at equal intervals, the diameter of each through hole 103 is equal to that of a bolt on the mounting part 2, fixed-point adjustment can be realized by adjusting the position of the bolt on the mounting part 2 relative to each through hole 103, and the device has a simple structure and low processing cost; for the arrangement of the through holes 103, two ends of the cross beam 1 may be respectively disposed.

It is to be understood that the above-described embodiments of the present utility model are merely illustrative of or explanation of the principles of the present utility model and are in no way limiting of the utility model. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present utility model should be included in the scope of the present utility model. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.

Claims (8)

1. A spreader for lifting a steel box girder, comprising:

The lifting device comprises a cross beam (1), wherein mounting parts (2) are arranged at two ends of the cross beam (1), and clamping pieces (3) connected with the lifting device are arranged in the middle of the cross beam;

The fixing assembly (4), one side of the installation part (2) is symmetrically provided with the fixing assembly (4), and the fixing assembly (4) comprises an upper support plate (401) and a lower support plate (402); the upper support plate (401) is connected with the installation part (2) through a steel cable, and the lower part is connected with the lower support plate (402) through bolts, so that the steel box girder is fixed.

2. The lifting sling for steel box girders as set forth in claim 1, wherein: the upper support plate (401) is provided with a first roller (403); the mounting part (2) is provided with a second roller (201) matched with the first roller (403).

3. The lifting sling for steel box girders as set forth in claim 1, wherein: the lower support plates (402) are used in pairs, and two adjacent lower support plates (402) are connected through bolts.

4. The lifting sling for steel box girders as set forth in claim 1, wherein: the beam (1) is provided with an adjusting device (5) connected with the mounting part (2), and the mounting part (2) can be driven to be adjusted along the length direction of the beam (1) through the adjusting device (5).

5. The lifting sling for a steel box girder according to claim 4, wherein: a limiting hole (101) is formed in the end portion of the cross beam (1); the adjusting device (5) comprises an adjusting rod (501) and a sliding block (502); both ends of the adjusting rod (501) are connected with the cross beam (1); the sliding block (502) is located below the limiting hole (101) and is in threaded connection with the adjusting rod (501), and a plurality of threaded holes (503) are formed in the sliding block (502).

6. The lifting sling for steel box girders as set forth in claim 5, wherein: one side of the sliding block (502) is provided with a guide block (504), and the cross beam (1) is provided with a sliding groove (102) matched with the guide block (504).

7. The steel box girder lifting sling as defined in claim 6, wherein: the guide block (504) is rectangular or dovetail shaped.

8. The lifting sling for steel box girders as set forth in claim 1, wherein: one end of the cross beam (1) is provided with a plurality of through holes (103) at equal intervals.