CN219218690U

CN219218690U - Lower guide beam supporting structure of folding self-expanding bridge girder erection machine

Info

Publication number: CN219218690U
Application number: CN202223328130.7U
Authority: CN
Inventors: 王新力; 任勇; 韩学敏; 黄禹; 刘学辉; 袁帅; 白新荣; 董亮; 耿立峰
Original assignee: Fifth Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
Current assignee: Fifth Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-06-20
Anticipated expiration: 2032-12-13

Abstract

The utility model discloses a lower guide beam supporting structure of a folding self-expanding bridge girder erection machine, which comprises folding supporting legs, supporting leg diagonal braces, a winch and a chain block; the upper side wall of the folding supporting leg is hinged with the bottom of the lower guide beam, and the lower side wall of the folding supporting leg is fixedly provided with a first connecting lug connected with the output end of the winch; a second connecting lug is fixedly arranged on the bottom surface of the middle section of the lower guide beam; the chain block is fixedly hung on the side wall of the lower guide beam, and the power output end of the chain block is hung and connected with the middle section of the supporting leg diagonal brace; two ends of the supporting leg diagonal bracing are hinged with the first connecting lug and the second connecting lug respectively. The folding self-expanding operation of the supporting structure is simple, safe and labor-saving, the erection difficulty of the lower guide beam of the bridge girder erection machine is effectively reduced, the dependence on heavy lifting equipment is reduced, the high risk problem of construction under complex construction environment conditions is reduced, and the lease investment of heavy lifting equipment and other heavy equipment is reduced.

Description

Lower guide beam supporting structure of folding self-expanding bridge girder erection machine

Technical Field

The utility model relates to the technical field of bridge construction, in particular to a lower guide beam supporting structure of a folding self-expanding bridge girder erection machine.

Background

At present, the construction of high-speed railways in China is in the vigorous development period, the proportion of bridges in newly built high-speed railway lines is approximately 50%, and the box girder erection construction is a commonly used construction method in the current bridge engineering.

At present, the box girder frame of the high-speed railway needs to carry out the operation that bridge girder erection equipment passes through the cast-in-situ continuous girder, however, when the environment is complex, particularly the mountain potential is steep or the river side bridge is constructed, the surrounding operation environment can not provide a hoisting machinery working face, and at the moment, the hoisting support and the installation of the lower guide girder of the bridge girder erection machine and the bottom support structure thereof have higher construction risks.

Therefore, how to realize the folding self-expanding function of the lower guide beam under the working condition that the complex environment does not support a large amount of heavy hoisting machinery is a technical problem to be solved urgently by the person in the field.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the folding self-expanding bridge girder erection machine lower guide beam supporting structure which is simple in folding self-expanding operation, safe and labor-saving, effectively reduces the erection difficulty of the bridge girder erection machine lower guide beam, reduces the dependence on heavy lifting equipment, reduces the high risk problem of construction under complex construction environment conditions, and reduces the lease investment of heavy equipment such as heavy lifting equipment.

A lower guide beam supporting structure of a folding self-expanding bridge girder erection machine comprises folding supporting legs, supporting leg diagonal braces, a winch and a chain block; the upper side wall of the folding supporting leg is hinged with the bottom of the lower guide beam, and the lower side wall of the folding supporting leg is fixedly provided with a first connecting lug connected with the output end of the winch; a second connecting lug is fixedly arranged on the bottom surface of the middle section of the lower guide beam; the chain block is fixedly hung on the side wall of the lower guide beam, and the power output end of the chain block is hung and connected with the middle section of the supporting leg diagonal brace; two ends of the supporting leg diagonal bracing are hinged with the first connecting lug and the second connecting lug respectively.

Preferably, a chain block is arranged above the middle position of a horizontal connecting line of the vertical line where the first connecting lug is located and the vertical line where the second connecting lug is located, and two ends of the supporting leg diagonal bracing are respectively led to pass through the first connecting lug and the second connecting lug in the process of lowering the supporting leg diagonal bracing by the chain block.

Preferably, the upper side wall of the folding supporting leg is fixedly provided with a guide pier column, and the guide pier column is a bent solid steel column; the bottom of the lower guide beam is fixedly provided with a constraint ring seat, and the inside of the constraint ring seat penetrates through in a sliding manner and is matched with the splicing guide pier column in a guiding manner.

Preferably, the hoist is fixedly arranged on the side wall of the lower guide beam, the output end of the hoist is fixedly connected with the first connecting lug in a hanging manner through a steel wire rope, and the hoist provides descending constraint and ascending action force for the folding supporting leg.

The utility model has the advantages and technical effects that:

according to the lower guide beam supporting structure of the folding self-expanding bridge girder erection machine, under a folding posture, the supporting leg diagonal braces are hung on two sides of the lower guide beam through the chain block; the folding supporting leg is hung below the lower guide beam through a winch and a guide pier column; the lower guide beam, the folding support leg and the support leg diagonal bracing are realized without being separated from each other, and the whole transfer function is convenient.

The guide pier column slides in the constraint ring seat in the unfolding process to provide a rotation fulcrum for the folding supporting leg, and the winch pays off to provide descending constraint for the folding supporting leg until the folding supporting leg is supported below the lower guide beam under the drive of self gravity; on the other hand, two ends of the chain block can be sequentially locked in the first connecting lug and the second connecting lug through pin shafts in the process of lowering the supporting leg diagonal bracing; the folding and self-unfolding functions of the supporting structure can be realized without large-scale lifting equipment.

Drawings

FIG. 1 is a schematic view of a lower guide beam support structure in a folded position according to the present utility model;

FIG. 2 is a schematic view of the lower guide beam support structure of the present utility model in an expanded position;

in the figure: 1-a winch; 2-a lower guide beam; 3-chain block; 4-supporting leg diagonal bracing; 5-a confinement ring seat; 6-folding the supporting legs; 7-a second connecting ear; 8-a first connection lug; 9-guiding pier stud.

Detailed Description

For a further understanding of the nature, features, and efficacy of the present utility model, the following examples are set forth to illustrate, but are not limited to, the utility model. The present embodiments are to be considered as illustrative and not restrictive, and the scope of the utility model is not to be limited thereto.

A lower guide beam supporting structure of a folding self-expanding bridge girder erection machine comprises folding supporting legs 6, supporting leg diagonal bracing 4, a winch 1 and a chain block 3; the upper side wall of the folding supporting leg is hinged with the bottom of the lower guide beam 2, and the lower side wall of the folding supporting leg is fixedly provided with a first connecting lug 8 connected with the output end of the winch; the bottom surface of the middle section of the lower guide beam is fixedly provided with a second connecting lug 7; the chain block is fixedly hung on the side wall of the lower guide beam, and the power output end of the chain block is hung and connected with the middle section of the supporting leg diagonal brace; two ends of the supporting leg diagonal bracing are hinged with the first connecting lug and the second connecting lug respectively.

Preferably, the upper side wall of the folding supporting leg is fixedly provided with a guide pier column 9, and the guide pier column is a bent solid steel column; the bottom of the lower guide beam is fixedly provided with a constraint ring seat 5, and the inside of the constraint ring seat penetrates through in a sliding manner and is matched with the splicing guide pier column in a guiding manner.

In order to more clearly describe the specific embodiments of the present utility model, an example is provided below:

according to the lower guide beam supporting structure of the folding self-expanding bridge girder erection machine, the folding posture is shown in the figure 1, and in the folding posture, the pin shafts of the two ends of the diagonal braces of the supporting legs, which are connected with the first connecting lugs and the second connecting lugs, are required to be manually removed; the middle section of the supporting leg diagonal bracing is pulled up by the chain block, and finally the supporting leg diagonal bracing is hung on two sides of the lower guide beam in a relative horizontal posture, so that position interference caused by folding and storage of the later folding supporting leg is avoided; and finally, starting the winding machine to take up the wire, so that the folding support legs take sliding connection points of the guide pier columns and the constraint ring seats as fulcrums, and executing anticlockwise rotation folding actions as shown in the figure 1 until the folding support legs are attached to the bottom surface of the lower guide beam in a relative horizontal posture, thereby completing all folding and storage of the support structure.

According to the lower guide beam supporting structure of the folding self-expanding bridge girder erection machine, the expanding posture is shown in the figure 2, in the expanding process, a winch is firstly paid off, and the folding support legs are driven by the weight of the winch to execute the anticlockwise rotating expanding action shown in the figure 2; after the folding supporting leg is unfolded, the supporting leg diagonal bracing hung at the bottom of the hand-pulling block in a relative horizontal posture is lowered, and in the lowering process, one end of the supporting leg diagonal bracing is firstly connected with the second connecting lug, and at the moment, a pin shaft between the supporting leg diagonal bracing and the second connecting lug is manually installed to finish hinging connection of the supporting leg diagonal bracing and the second connecting lug; then, the hand-pulling block is continuously lowered until the bottom end of the supporting leg diagonal brace is connected with the first connecting lug through the first connecting lug, and then the bottom end of the supporting leg diagonal brace is connected with the first connecting lug through the manual pin shaft; thereby completing the deployment and securement of the overall support structure.

It should be noted that, under folding and unfolding postures, the output end of the winch is always hung on the first connecting lug, and the output end of the chain block is always hung on the middle section of the supporting leg diagonal bracing.

Finally, the utility model adopts the mature products and the mature technical means in the prior art.

While the methods and techniques of the present utility model have been described in terms of preferred embodiments, it will be apparent to those skilled in the art from this disclosure that variations and rearrangements of the methods and techniques can be made by those skilled in the art to arrive at a final preparation technique without departing from the spirit and scope of the utility model. It is expressly intended that all such similar substitutes and modifications apparent to those skilled in the art are deemed to be included within the spirit, scope and content of the utility model. And it should be understood that modifications and variations can be made by those skilled in the art in light of the foregoing description and all such modifications and variations are intended to be included within the scope of the utility model as defined in the following claims.

Claims

1. The utility model provides a folding bridge crane lower nose girder bearing structure that stretches out certainly which characterized in that: comprises folding supporting legs, supporting leg diagonal braces, a winch and a chain block; the upper side wall of the folding supporting leg is hinged with the bottom of the lower guide beam, and the lower side wall of the folding supporting leg is fixedly provided with a first connecting lug connected with the output end of the winch; a second connecting lug is fixedly arranged on the bottom surface of the middle section of the lower guide beam; the chain block is fixedly hung on the side wall of the lower guide beam, and the power output end of the chain block is hung and connected with the middle section of the supporting leg diagonal bracing; and two ends of the supporting leg diagonal bracing are hinged with the first connecting lug and the second connecting lug respectively.

2. The folding and self-expanding bridge girder erection machine lower guide girder supporting structure according to claim 1, wherein: a hand chain block is arranged above the middle position of a horizontal connecting line of the vertical line where the first connecting lug is located and the vertical line where the second connecting lug is located, and two ends of the supporting leg diagonal bracing are respectively led to be in a way of the first connecting lug and the second connecting lug in the process of lowering the supporting leg diagonal bracing by the hand chain block.

3. The folding and self-expanding bridge girder erection machine lower guide girder supporting structure according to claim 1, wherein: a guide pier column is fixedly arranged on the side wall of the upper part of the folding supporting leg, and is a bent solid steel column; and the bottom of the lower guide beam is fixedly provided with a constraint ring seat, and the inside of the constraint ring seat slides to penetrate and is in guiding fit with the splicing guide pier column.

4. The folding and self-expanding bridge girder erection machine lower guide girder supporting structure according to claim 1, wherein: the winch is fixedly arranged on the side wall of the lower guide beam, the output end of the winch is fixedly connected with the first connecting lug in a hanging mode through a steel wire rope, and the winch provides descending constraint and ascending action force for the folding supporting leg.