CN111851301A - a bridge erecting machine - Google Patents

Abstract

The invention discloses a bridge erecting machine, which mainly comprises: a longitudinal main beam, a connecting beam, a cantilever beam, a hoisting crane, a walking trolley, a front outrigger, a rear outrigger and a counterweight. The longitudinal main beams are connected by connecting beams, the cantilever beams are installed above the longitudinal main beams, and the slide rails are laid above the cantilever beams, so that the crane can slide freely above the cantilever beams. The rear end of the main beam is provided with a rear support leg. By setting the cantilever beam above the longitudinal main beam, the bridge side beam can be lifted; the cantilever beam is installed with a counterweight to ensure the stability of the bridge erection machine during the beam lifting operation. The invention has simple structure, clear mechanism, convenient processing, and can effectively improve the efficiency of beam dismantling and beam erection.

Description

a bridge erecting machine

technical field

The invention belongs to the technical field of bridge erecting machine equipment, and particularly relates to a novel bridge erecting machine.

Background technique

With the improvement of the country's economic strength, the traffic flow is increasing year by year, and the traffic load has far exceeded the design load of the year. At the same time, the rapid growth of traffic flow has also made the traffic capacity of urban bridges increasingly stretched, and urban bridges have become more and more congested. The renewal of urban bridges is very important and urgent. The replacement of the main beam is the main form of bridge upgrading and reconstruction. At present, most of the urban bridges in urgent need of replacement are concentrated in the prosperous areas of the city center. The buildings are dense, the roads are busy, and the operating space is limited. The use of advanced and special equipment is of great significance to the rapid construction of bridge reconstruction.

In order to consider factors such as construction standardization, structural versatility, and overall stability, the traditional bridge erecting machine equipment is usually set in a longitudinally symmetrical form, and the beam erection and dismantling operations are realized between the two longitudinal main beams. The operation method It is generally fixed, the construction operation process is also relatively complex, and the construction speed is slow, which cannot meet the requirements of rapid construction in urban upgrading and renovation projects. Especially when there is a large-scale upgrading and reconstruction project with working space on the beam side, the construction period will be longer, and the traditional bridge erecting machine equipment is not economical enough. According to the special construction environment, the improvement of the equipment can make the bridge erection equipment more applicable.

SUMMARY OF THE INVENTION

The present invention mainly solves the problems existing in the above-mentioned prior art, and provides a new type of bridge erecting machine that is stable and can lift beams on the side. The invention is mainly suitable for the construction environment with working space on the beam side. Compared with the traditional bridge erecting machine, the outstanding advantage of the present invention is that the structure of the bridge erecting machine is simpler, the construction is more convenient and quicker in the scene where there is working space on the girder side, and the cantilever cantilever The cantilever length of the beam can be adjusted by setting a sliding device under the cantilever beam, and the weight of the counterweight can be adjusted according to the needs of the construction environment to ensure the structural stability.

In order to achieve the above purpose, the present invention provides a new type of bridge erecting machine structure, which mainly includes a longitudinal main beam, a connecting beam, a cantilever beam, a crane, a traveling trolley, a front outrigger, a rear outrigger and a counterweight. The longitudinal main beams are mechanically connected together by connecting beams; a cantilever beam is installed above the longitudinal main beam, a sliding rail is laid above the cantilever beam, and the crane can move on the cantilever beam along the sliding rail. The upper part slides freely; the front end of the longitudinal main beam is provided with a front leg, the rear end of the longitudinal main beam is provided with a rear leg, a counterweight is installed on the cantilever beam, and a walking beam is installed below the longitudinal main beam trolley.

Preferably, the cantilever beam extends out of the longitudinal main beam, and the extension length of the cantilever beam is determined according to the design requirements, and the cantilever beam can realize the operation of lifting the beam outside the bridge side.

Preferably, the counterweight is installed on one side of the cantilever beam by mechanical connection to balance the overall stability of the bridge erecting machine. The weight and installation position of the counterweight are determined according to design requirements. Perform an anti-overturning check.

Preferably, the traveling trolley is installed under the middle of the longitudinal main beam, so that the bridge erecting machine can travel on the working bridge deck.

Preferably, the bridge erecting machine is suitable for the lifting operation of prefabricated box girder, T girder and hollow slab girder with a small span of 15-30 m.

Preferably, the longitudinal main beam is composed of box beams of different lengths, and high-strength bolts are used to connect the box beams.

Preferably, the cantilever beam adopts a triangular truss structure, the triangular truss structure is composed of welded section steel, and the triangular truss structure can walk forward and backward on the longitudinal main beam; a crane crane is installed above each cantilever beam, and the crane crane It can move left and right on the cantilever beam, and the hoisting crane is equipped with a hoist, a roller and a steel wire rope.

Preferably, the front outriggers and the rear outriggers are both telescopic structures to ensure that the bridge erecting machine can be extended up and down in the process of moving back and forth and passing through holes, and a walking system is also designed on the front outriggers.

Compared with the prior art, the present invention realizes the lifting operation of the bridge side beam by setting the cantilever beam, and the construction is more efficient under special working conditions; Ensure the overall stability of the bridge erecting machine; the structure is simple in form, the force mechanism is clear, and it is easy to process and install.

Description of drawings

Fig. 1 is a front sectional view of a new type of bridge erecting machine;

Fig. 2 is a side view of a new type of bridge erecting machine;

Fig. 3 is a top view of a new type of bridge erecting machine;

Figure 4 is a cross-sectional view of a longitudinal main beam;

Figure 5 is a schematic diagram of a longitudinal main beam segment;

6 is a schematic diagram of a cantilever beam;

Fig. 7 is a kind of schematic diagram of the dismantling process of the new bridge erecting machine;

Fig. 8 is a schematic diagram of a new type of bridge erecting machine via process.

In the figure: 1—longitudinal main beam; 2—connecting beam; 3—cantilever beam; 4—travel trolley; 5—pulley; 6—hoisting crane; 7—counterweight block; 8—front outrigger; 9—rear outriggers.

Detailed ways

The technical solutions of the present invention will be further described in detail below through the embodiments and in conjunction with the accompanying drawings, and the characteristics of the present invention will be made clearer. It should be noted that the accompanying drawings are all in a very simplified form and in imprecise scales, and are only used to assist in explaining the purpose of the present invention conveniently and clearly.

Example: A new type of bridge erecting machine structure, as shown in Figures 1-3, includes a longitudinal main beam 1, a connecting beam 2, a cantilever beam 3, a crane 4, a walking trolley 5, a pulley 6, and a counterweight block 7. Front outrigger 8, rear outrigger 9. The longitudinal main beam 1 is mechanically connected with the connecting beam 2, a cantilever beam 3 is installed above the longitudinal main beam 1, a slide rail is laid above the cantilever beam 3, and the crane 6 can be above the cantilever beam 3 Free sliding, the front end of the longitudinal main beam 1 is provided with a front leg 8, the rear end of the longitudinal main beam 1 is provided with a rear leg 9, and a counterweight 4 is installed on the cantilever beam 3, below the longitudinal main beam 1 A walking trolley 5 is installed.

The cantilever beam 3 protrudes from the outside of the longitudinal main beam 1, and its length is determined according to the design requirements, and the cantilever beam 3 can realize the operation of lifting the beam outside the bridge side. The counterweight 7 is installed on one side of the cantilever beam 3 by mechanical connection, and is used to balance the overall stability of the bridge erecting machine. The weight and installation position of the counterweight 7 are determined according to the design requirements. Anti-overturning check. The walking trolley 5 is installed under the middle of the longitudinal main beam, so that the bridge erecting machine can walk on the working bridge deck. The new type of bridge erecting machine is suitable for beam lifting operations of 15-30m small-span prefabricated box girder, T girder and hollow slab girder.

As shown in Figures 4-5, the longitudinal main beam 1 is composed of box beams of different lengths, and each segment is connected by high-strength bolts.

As shown in FIG. 6 , the cantilever beam 3 adopts a triangular truss, and the triangular truss is composed of welded steel sections. The triangular truss can travel forward and backward on the longitudinal main beam. A crane 6 is set above each cantilever beam 3 to lift The crane 6 can move left and right on the cantilever beam 3, and the crane 6 is provided with a winch, a roller, and a wire rope for lifting operations.

In addition, the front outriggers 8 and the rear outriggers 9 are designed to be telescopic to ensure that the bridge erecting machine can be retracted up and down during the process of moving back and forth and passing through holes. At the same time, the front outriggers 8 are also designed with a walking system for the Bridge machine vias.

In order to solve the above problems, the present invention also provides a new method for lifting beams and a method for passing a hole.

The lifting method of the bridge erection machine is described as follows:

S1: The two cranes 6 are respectively parked at the set position of the cantilever beam 3, hooked to the end of the beam plate to be dismantled, and the two beam plates are lifted to the set height. The set position and set height are determined according to the operation requirements. ;

S2: The hoisting crane 6 traverses the set distance along the cantilever beam 3, so that the beam plate to be removed moves out of the bridge span position, and the set distance is determined according to the operation requirements;

S3: The crane 6 lowers the beam plate to be dismantled.

The via method of the bridge erection machine is described as follows:

S1: The two sets of cantilever beams 3 of the bridge erecting machine all travel and stop with the front end of the longitudinal main beam 1.

S2: The rear outrigger 9 is retracted by one segment;

S3: The bridge erecting machine walks forward on the unremoved beam plate through the walking system under the front outrigger 8 to the position where the beam plate is removed in the next section.

S4: The rear outriggers 8 are extended and supported on the cover beam.

S5: Move the main beam backward to the top of the beam plate to be removed, and prepare for the removal of the next hole beam plate.

To sum up, in the structure of a new type of bridge erecting machine provided in this embodiment, by setting the cantilever beam, the side beam lifting operation of the bridge is realized, and the applicable scope of the bridge erecting machine is expanded; The counterweight can be carried out according to the design requirements, which can ensure the overall stability of the bridge erecting machine; the structural form is simple, the force mechanism is clear, and it is easy to process and install; it can also reduce costs and improve construction efficiency.

The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes and modifications made by those of ordinary skill in the field of the present invention based on the above disclosure all belong to the protection scope of the claims.

Claims (10)

1. a bridge erecting machine is characterized in that: comprise longitudinal main beam, connecting beam, cantilever beam, crane crane, traveling trolley, front outrigger, rear outrigger and counterweight; The beams are mechanically connected together; a cantilever beam is installed above the longitudinal main beam; a sliding rail is laid above the cantilever beam, and the crane can slide freely along the sliding rail above the cantilever beam; the front end of the longitudinal main beam is provided with a front support The rear end of the longitudinal main beam is provided with a rear support leg, a counterweight is installed on the cantilever beam, and a walking trolley is installed under the longitudinal main beam. 2. A bridge erecting machine according to claim 1, characterized in that: the cantilever beam extends out of the longitudinal main beam, and the extension length of the cantilever beam is determined according to design requirements, and the cantilever beam can realize the lifting beam on the side of the bridge Operation. 3. A bridge erecting machine according to claim 1, characterized in that: the counterweight is installed on one side of the cantilever beam by mechanical connection to balance the overall stability of the bridge erecting machine. The weight and installation position are determined according to the design requirements, and the bridge erection machine needs to be checked for anti-overturning during the beam lifting operation. 4 . The bridge erecting machine according to claim 1 , wherein the traveling trolley is installed under the middle of the longitudinal main girder, so that the bridge erecting machine can walk on the working bridge deck. 5 . 5 . The bridge erecting machine according to claim 1 , wherein the bridge erecting machine is suitable for the lifting operation of prefabricated box girder, T girder and hollow slab girder with a small span of 15-30 m. 6 . 6 . The bridge erecting machine according to claim 1 , wherein the longitudinal main beam is composed of box-shaped beams of different lengths, and high-strength bolts are used to connect the box-shaped beams. 7 . 7. A bridge erecting machine according to claim 1, characterized in that: the cantilever beam adopts a triangular truss structure, the triangular truss structure is formed by welding section steel, and the triangular truss structure can travel back and forth on the longitudinal main beam; A hoisting crane is arranged above each cantilever beam, the hoisting crane can move left and right on the cantilever beam, and the hoisting crane is provided with a hoist, a roller and a wire rope. 8. A bridge erecting machine according to claim 1, characterized in that: the front outriggers and the rear outriggers are both telescopic structures to ensure that the bridge erecting machine can move up and down during the process of moving back and forth and passing through holes. Telescopic, and a walking system is also designed on the front outriggers. 9. A kind of bridge erection machine according to claim 1, is characterized in that: the beam lifting method of this bridge erection machine is implemented as follows, S1: The two cranes are respectively parked at the set position of the cantilever beam, hooked to the end of the beam plate to be dismantled, and the two beam plates are lifted to the set height. The set position and set height are determined according to the operation requirements; S2: The hoisting crane traverses the set distance along the cantilever beam, so that the beam plate to be removed moves out of the bridge span position, and the set distance is determined according to the operation requirements; S3: The beam plate to be dismantled is placed under the crane. 10. A kind of bridge erection machine according to claim 1, is characterized in that: the through hole method of this bridge erection machine is as follows: S1: The 2 sets of cantilever beams of the bridge erecting machine all walk and stop with the front end of the longitudinal main beam; S2: The rear outrigger is retracted by one segment; S3: The bridge erecting machine walks forward on the unremoved girder slab through the walking system under the front outrigger to the position where the girder slab is removed in the next section; S4: The rear outrigger is extended and supported on the cover beam; S5: Move the main beam backward to the top of the beam plate to be removed, and prepare for the removal of the next hole beam plate.

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