CN208121587U - Auxiliary leg before Large span bridging machine variable-span multi-stage expansion - Google Patents

Abstract

A variable-span multi-stage telescopic front auxiliary outrigger of a large-span bridge erecting machine, comprising a running device, an upper climbing device, a middle climbing device and a lower lifting device arranged sequentially from top to bottom, the running device at least includes an upper beam and Drive assembly, the upper beam is located between the main girders of the bridge erecting machine, the drive assembly is fixedly installed at the left and right ends of the top of the upper beam, and the upper climbing device includes an upper climbing oil cylinder, an upper conversion sleeve and an upper inner cylinder Therefore, the front auxiliary legs of the utility model have three-stage telescopic functions, which can control the climbing of each stage separately or in combination to meet the conversion from normal girders to end-span girders, to adapt to girders with a certain slope, and to pass through tunnels with bridge erecting machines, etc. The high and low displacement requirements of the support point under different working conditions, and the variable span support can be realized. The whole process is simple and fast to operate, and there is no need to consider disassembly. Therefore, it has the characteristics of simple structure and convenient operation, which is conducive to improving the working efficiency and comprehensive utilization rate of the bridge erecting machine.

Description

Large-span bridge erecting machine with variable span and multi-stage telescopic front auxiliary outriggers

technical field

The utility model relates to the technical field of bridge construction, in particular to a variable-span multi-stage telescopic front auxiliary support leg of a large-span bridge erecting machine.

Background technique

In order to ensure the stability and safety of high-speed railway trains, as well as the ability to resist natural disasters such as earthquakes, high-speed railway bridges often use prefabricated box girders with large tonnage and large spans (such as 20m, 24m, 32m, etc.). When the span of a simply supported girder bridge is greater than 32m, only simply supported girder bridges cast in situ or continuous girders and continuous rigid frame bridges can be used at present, and the economic index decreases and the quality control is more difficult. If the large-scale application of prestressed concrete simply supported beams with a span of 40m or more is realized, and the construction mode of centralized prefabrication in the girder making yard along the line, moving of beam trucks, and erection of bridge erecting machines is adopted, the prestressed concrete simply supported beams of high-speed railways will be expanded. The scope of application of the bridge improves the economy of the bridge. Due to the increase in the span and weight of the long-span simply supported box girder, the traditional bridge erecting machine has been unable to adapt to the erection of this type of box girder. This puts forward higher requirements for the design and use of large-tonnage bridge erecting machines. Especially when moving through the hole vertically, due to the larger span, in order to increase its overall stability and overcome the front suspension and downward deflection of the main girder, it is necessary to use the front auxiliary legs to assist the main girder of the bridge erecting machine.

When the beam is erected normally, the front auxiliary outrigger station is located on the top of the pier, and when the end-hole beam is erected, the front auxiliary outrigger station is located on the bridge deck or roadbed. Due to the height difference between the top of the pier and the bridge deck or roadbed, when the normal girder is converted to the end-hole girder, the front auxiliary leg needs to have the height conversion function of its own support point.

In addition, according to the construction needs of high-speed railway bridges, the bridge erecting machine not only needs to adapt to 40m span beams, but also needs to meet variable span beams such as 20m, 24m, and 32m spans, so that one machine can be used for multiple purposes. This requires the front auxiliary outrigger to have the function of variable-span support. And because the span is large, under the same slope and different span conditions, the height conversion stroke of the support point of the front auxiliary outrigger changes more.

Furthermore, in order to improve work efficiency, when the bridge erecting machine passes through the tunnel, the front auxiliary legs need to be transported without disassembly. These have become one of the difficulties in the design of the bridge erecting machine and the construction of the beam erection.

In the patent No. 201520080531.6 "Front Auxiliary Outriggers of New Type Large Tonnage Bridge Erecting Machine" technology, the electric hoist is used to flip the vertical section of the front auxiliary outriggers to realize the conversion from the normal erection beam to the last spanning beam. In the patent No. 201720831957.X "a front auxiliary outrigger that can be converted from rigid to flexible", a double-layer frame structure design with C-shaped beams connected to the outer outriggers is adopted, and connected by high-strength bolts to meet the requirements of the normal frame. The needs of two different working conditions of the beam and the end span beam.

However, the above-mentioned technology still needs to repeatedly dismantle and install the flange bolts of the connecting section and cooperate with the overturning action to meet the working conditions of the front auxiliary leg passing through the tunnel and the transition between the normal girder and the end span girder, which will inevitably increase the construction workload and complexity. It is not conducive to the improvement of construction efficiency. Moreover, the above-mentioned front auxiliary legs are all fixed on the front connecting beam or the front crossbeam of the main girder, that is, the longitudinal position relative to the main girder is not adjustable, which cannot meet the requirements of the variable-span girder.

For this reason, in view of the above-mentioned defects, the designer of the present utility model researched and designed a variable-span multi-stage telescopic front auxiliary support for a long-span bridge erecting machine by integrating the experience and achievements of related industries for many years. legs to overcome the above defects.

Utility model content

The purpose of the utility model is to provide a variable-span multi-stage telescopic front auxiliary leg of a large-span bridge erecting machine, which has a simple structure, convenient operation, flexible adjustment of height, simple processing procedure, easy installation, and safety and reliability.

In order to achieve the above purpose, the utility model discloses a variable-span multi-stage telescopic front auxiliary leg of a large-span bridge erecting machine, which includes a running device, an upper climbing device, a middle climbing device and a lower lifting device arranged in sequence from top to bottom , characterized by:

The running device at least includes an upper beam and a drive assembly, the upper beam is located between the main beams of the bridge erecting machine, and the drive assembly is fixedly installed on the left and right ends of the top of the upper beam,

The upper climbing device includes an upper climbing oil cylinder, an upper conversion sleeve and an upper inner cylinder. One end of the upper climbing oil cylinder is fixed to the upper beam, and the other end is hinged to the upper conversion sleeve. The upper inner cylinder penetrates the upper conversion sleeve on both sides. and the upper beam, the upper conversion sleeve and the upper beam are provided with pin holes corresponding to the upper inner cylinder, and a plurality of positioning pin holes are arranged at intervals in the upper and lower directions of the upper inner cylinder so as to realize the connection between the upper conversion sleeve and the upper beam and the upper beam. The connection of the inner cylinder.

Wherein: the middle climbing device includes a middle conversion sleeve, a middle outer cylinder and a middle climbing oil cylinder, one end of the middle climbing oil cylinder is installed on the left and right sides of the middle outer cylinder, and the other end is hinged to the left and right sides of the middle conversion sleeve , both the middle conversion sleeve and the middle outer cylinder are set through by the upper inner cylinder.

Wherein: the left and right sides of the middle conversion sleeve are provided with a middle conversion sleeve latch assembly and a pin hole so as to realize the pinning of the middle conversion sleeve and the upper inner cylinder.

Wherein: the left and right sides of the middle outer cylinder are provided with an upper inner column latch assembly and a latch hole so as to realize the pinning of the middle outer cylinder and the upper inner cylinder.

Wherein: the lower lifting device includes a lower inner cylinder, a lower lifting cylinder and a lower beam, the lower inner cylinders are two and the upper ends are slidably placed in the hollow column cavity of the middle outer cylinder, and the lower ends are fixed on The lower beam, one end of the lower lifting cylinder is hinged to the middle outer column, and the other end is hinged to the lower beam.

Among them: there is also a lower inner column latch assembly, which is two and symmetrically installed on the left and right sides of the middle outer column. Each lower inner column latch assembly corresponds to the inner column respectively. Both sides of the cylinder are respectively provided with pin holes for the insertion of the lower inner column latch assembly, and a plurality of positioning holes are arranged at intervals on the lower inner column so as to be fixed by the lower inner column latch assembly.

Wherein: the left and right ends of the upper beam are also provided with an upper beam latch assembly, and the left and right end faces of the upper beam are provided with latch holes corresponding to the upper beam latch assembly and can be hinged to the main girder of the bridge erecting machine through the upper beam latch assembly .

Wherein: the upper conversion sleeve and the upper beam are pinned to the upper inner cylinder through a manual pin shaft.

It can be seen from the above structure that the variable-span multi-stage telescopic front auxiliary legs of the large-span bridge erecting machine of the present invention have the following effects:

1. When the normal beam is erected towards the end span beam, the fast and efficient conversion of its own support point between the top of the pier or the beam surface of the end hole is realized;

2. Satisfy the requirements for height displacement of support points when erecting beams with a certain slope;

3. When the bridge erecting machine passes through the tunnel, the front auxiliary outriggers can be transported without disassembly;

4. It can meet the needs of the variable-span girder, that is, the longitudinal position of the front auxiliary leg relative to the main beam can be adjusted, and the support of the variable-span girder can be realized conveniently.

The details of the present invention can be obtained from the following description and the accompanying drawings.

Description of drawings

Fig. 1 has shown the structural schematic diagram of the variable-span multi-stage telescopic front auxiliary leg of the large-span bridge erecting machine of the present invention;

Fig. 2 has shown the left view of the utility model;

Fig. 3 is a schematic diagram of the effect after the first two stages of climbing of the utility model.

Reference signs:

1 is the upper conversion sleeve; 2 is the upper beam; 3 is the upper climbing cylinder; 4 is the upper inner cylinder; 5 is the middle conversion sleeve; 6 is the middle outer cylinder; 7 is the lower inner cylinder; 8 is the drive assembly; 9 is the upper beam latch assembly; 10 is the manual latch; 11 is the middle climbing cylinder; 12 is the middle conversion sleeve latch assembly; 13 is the upper inner column latch assembly; 14 is the lower lift cylinder; 15 is the lower inner column latch assembly; 16 is lower beam.

Detailed ways

Referring to Figures 1 and 2, it shows the variable-span multi-stage telescopic front auxiliary legs of the large-span bridge erecting machine of the present invention.

The variable-span multi-stage telescopic front auxiliary outrigger of the large-span bridge erecting machine may include a running device, an upper climbing device, a middle climbing device and a lower lifting device arranged in sequence from top to bottom.

As shown in Figure 1, the running device at least includes an upper beam 2 and a drive assembly 8, the upper beam 2 is located between the main girders of the bridge erecting machine, and the drive assembly 8 is fixedly installed on the left and right sides of the top of the upper beam 2 end, wherein, the left and right ends of the upper beam 2 are also provided with an upper beam latch assembly 9, and the left and right end faces of the upper beam 2 are provided with latch holes corresponding to the upper beam latch assembly 9, and can pass through the upper beam latch assembly. 9 is hinged with the main girder of the bridge erecting machine.

The upper climbing device includes an upper climbing oil cylinder 3, an upper conversion sleeve 1 and an upper inner cylinder 4. The upper conversion sleeve 1 is located above the upper beam 2, and one end of the upper climbing oil cylinder 3 can be fixed on the upper The middle part of the crossbeam 2 and the other end are hinged to the upper conversion sleeve 1. The upper inner cylinders 4 are two and penetrate the hollow column cavity of the upper conversion sleeve 1 and the hollow column cavity of the upper crossbeam 2 from both sides of the upper climbing cylinder 3. Thus, the upper inner cylinder 4 can move up and down relative to the upper beam 2 and the upper conversion sleeve 1, and the upper conversion sleeve 1 and the upper beam 2 are provided with pin holes corresponding to the position of the upper inner cylinder 4, so A plurality of positioning pin holes are arranged at intervals in the upper and lower directions of the upper inner cylinder 4, and the upper conversion sleeve 1 and the upper beam 2 are pinned to the upper inner cylinder 4 through the manual pin shaft 10, thus, the upper inner column After the body 4 moves up and down relative to the upper beam 2 and the upper conversion sleeve 1, the upper inner column body 4 can be pinned after climbing or descending relative to the upper beam 2 and the upper conversion sleeve 1 through the manual latch 10.

The middle climbing device includes a middle conversion sleeve 5, a middle outer cylinder 6 and a middle climbing oil cylinder 11. The middle conversion sleeve 5 is located above the middle outer cylinder 6. There are two middle climbing oil cylinders 11 and one end can be passed through a bolt It is symmetrically installed on the left and right sides of the middle outer cylinder 6, and the other end is hinged with the left and right sides of the middle conversion sleeve 5, and the middle conversion sleeve 5 and the middle outer cylinder 6 are provided through by the upper inner cylinder 4, so that The upper inner cylinder 4 can also move up and down relative to the middle conversion sleeve 5 and the middle outer cylinder 6 .

The left and right sides of the middle conversion sleeve 5 are provided with a middle conversion sleeve latch assembly 12 and a latch hole, so that the middle conversion sleeve 5 and the upper inner cylinder 4 are pinned through the middle conversion sleeve latch assembly 12, and the middle outer column The left and right sides of the body 6 are provided with an upper inner column latch assembly 13 and a latch hole, thereby realizing the pinning of the middle outer cylinder 6 and the upper inner column 4 through the upper inner column latch assembly 13. Preferably, the middle conversion The sleeve latch assembly 12 is symmetrically installed on the left and right sides of the middle conversion sleeve 5 , and the upper inner column latch assembly 13 is symmetrically installed on the left and right sides of the middle outer cylinder 6 .

Wherein, the lower lifting device includes a lower inner cylinder 7, a lower lifting cylinder 14 and a lower crossbeam 16, the lower inner cylinder 7 is two and the upper end is slidably inserted into the hollow column cavity of the middle outer cylinder 6 Inside, the lower end is fixed on the lower beam 16, one end of the lower lifting cylinder 14 is hinged with the middle outer column 6, and the other end is hinged with the lower beam 16, wherein the lower lifting cylinder 14 is two and arranged on both sides , there is also a lower inner column latch assembly 15, said lower inner column latch assembly 15 is two and symmetrically installed on the left and right sides of the middle outer cylinder 6, and each lower inner column latch assembly 15 corresponds to the inner cylinder 7 respectively, Both sides of the middle outer cylinder 6 are respectively provided with pin holes for the insertion of the lower inner column latch assembly 15, and a plurality of positioning holes are arranged at intervals on the lower inner column 7, so that the lower inner column latch assembly 15 can Pin solid.

Therefore, one end of the auxiliary leg structure of the bridge erecting machine of the present invention is hinged on the main beam of the bridge erecting machine through the upper beam, and the other end is supported and stabilized on the pier top or the bridge surface by the lower beam of the lower lifting device. The structure of the auxiliary outriggers of the bridge erecting machine is composed of a number of telescopic joints. Each telescopic joint is provided with a plurality of positioning pin holes at intervals, and a pin is provided in conjunction with the positioning pin holes. The pin passes through the corresponding positioning positions of two adjacent telescopic joints. The pin hole connects the two expansion joints.

Introduce the concrete implementation process of the present utility model below:

When the upper climbing device is working, first pull out the manual latch 10 of the upper inner column 4, release the pin limit of the upper inner column 4 and the upper beam 2, and then manipulate the upper climbing oil cylinder 3 to raise the upper conversion sleeve 1, and the upper conversion sleeve 1 Drive the upper inner cylinder 4 to climb upwards, and insert the manual pin shaft 10 after it is in place to fix the relative position of the upper inner cylinder 4 and the upper beam 2 . This enables the first stage of climbing of the front auxiliary leg.

When the middle climbing device is working, firstly pull out the pin assembly 12 of the middle conversion sleeve, release the pin limit between the middle conversion sleeve 5 and the upper inner cylinder 4, and then manipulate the middle climbing oil cylinder 11 to extend the middle conversion sleeve 5 upwards, and then the middle conversion sleeve 5 is put in place. The conversion sleeve plug assembly 12 is inserted into the plug to fix the relative position between the middle conversion sleeve 5 and the upper inner cylinder 4 . Then, the upper inner column latch assembly 13 pulls out the latch, releases the latch limit between the middle outer cylinder 6 and the upper inner cylinder 4, and then manipulates the middle climbing cylinder 11 to upwardly retract the middle outer cylinder 6, and puts the upper inner column latch The component 13 is inserted into the pin, and is used to fix the relative position of the middle outer cylinder 6 and the upper inner cylinder 4 . Repeat above-mentioned action, then middle outer cylinder 6 climbs up repeatedly. This enables the second stage of climbing of the front auxiliary leg.

When the lower lifting device is working, firstly the lower inner cylinder latch assembly 15 is pulled out the latch, and the latch limit of the middle outer cylinder 6 and the lower inner cylinder 7 is released, and then the lower lifting cylinder 14 is manipulated to pack the lower beam 16, and then lower the The inner column latch assembly 15 is inserted into the latch to fix the relative position of the middle outer column 6 and the lower inner column 7 . This enables the third stage of climbing of the front auxiliary leg.

When the normal girder is converted to the end-span girder, the second level of climbing plays the main adjustment role; when adapting to a certain slope girder erection, the third level of climbing plays the main adjustment role; when the bridge erecting machine passes through the tunnel, the third level of climbing is adjusted Climb to minimize the space occupied by the front auxiliary legs in the vertical direction, so as to avoid interference with the tunnel wall.

When changing the span beam, the running device plays the main role of adjustment. When the running device is working, firstly, the upper crossbeam latch assembly 9 drives the bolt originally installed in the main beam to retract into the upper crossbeam 2, and releases the latch limit between the main beam and the front auxiliary leg, and then, the drive assembly 8 drives the front auxiliary The outrigger moves longitudinally along the main girder, and when it is in place, the bolt assembly 9 of the upper beam protrudes out and is inserted into the main girder to fix the relative position between the main girder and the front auxiliary outrigger. The beam forms a pin hinged structure, and the front auxiliary leg will always remain perpendicular to the horizontal plane due to its own weight, so that the front auxiliary leg can stand vertically on the top of the pier, thereby supporting the main beam. In addition, during the normal beam erecting process, starting the traveling device can make the front auxiliary outrigger out of the way of the beam drop position of the lifting trolley.

The large-span bridge erecting machine of the utility model has variable-span multi-stage telescopic front auxiliary outriggers with three-stage telescopic functions, which can control the climbing of all levels separately or in combination, so as to meet the conversion from normal erection girders to end-span elongation girders and adapt to a certain slope frame For the height displacement requirements of support points under different working conditions such as beams and bridge erecting machines passing through tunnels, see the effect diagram of the front auxiliary outrigger after the first two stages of climbing shown in Figure 3. When changing the span of the girder, the longitudinal position of the front auxiliary leg on the main beam can be adjusted by controlling the running device to realize the span-changing support. The whole process is simple and quick to operate, and there is no need to consider dismantling, so it has the characteristics of simple structure and convenient operation, which is conducive to improving the working efficiency and comprehensive utilization rate of the bridge erecting machine.

Obviously, the above descriptions and records are only examples and not intended to limit the disclosure, application or use of the present utility model. Although the embodiment has been described in the embodiment and described in the accompanying drawings, the utility model is not limited by the examples of the accompanying drawings and described in the embodiment as the best mode currently considered to implement the teaching of the utility model Certain examples, the scope of the present invention shall include any embodiment falling within the foregoing description and appended claims.

Claims (8)

1. auxiliary leg before a kind of Large span bridging machine variable-span multi-stage expansion walks luggage including what is set gradually from top to bottom It sets, upper climbing device, middle climbing device and lower lifting device, it is characterised in that：

The running gear includes at least upper beam and drive assembly, and the upper beam is between crane's major girder, the drive Dynamic assembly is fixedly installed in left and right ends at the top of upper beam,

The upper climbing device includes swash oil-lifting jar, upper conversion sleeve and upper inner cylinder, and described oil-lifting jar one end of swashing is fixed Crossbeam, the other end are articulated with conversion sleeve, and the upper inner cylinder runs through upper conversion sleeve and upper beam, the upper conversion sleeve in two sides Be equipped with pin hole with the corresponding upper inner cylinder of upper beam, the up and down direction of the upper inner cylinder be equipped at intervals with multiple dowel holes from And realize the connection of upper conversion sleeve and upper beam and upper inner cylinder.

2. auxiliary leg before Large span bridging machine variable-span multi-stage expansion as described in claim 1, it is characterised in that：In described Climbing device include middle conversion sleeve, intermediate outer cylindrical body and in climb oil cylinder, it is described in climb one end of oil cylinder be installed on outside centre At left and right sides of cylinder, the left and right sides of the other end and middle conversion sleeve is carried out hingedly, and the middle conversion sleeve and intermediate outer cylindrical body supply Upper inner cylinder is through setting.

3. auxiliary leg before Large span bridging machine variable-span multi-stage expansion as claimed in claim 2, it is characterised in that：In described The left and right sides of conversion sleeve is equipped with middle conversion inserting pin assemblies and pin hole to the pin of conversion sleeve and upper inner cylinder in realization Gu.

4. auxiliary leg before Large span bridging machine variable-span multi-stage expansion as claimed in claim 2, it is characterised in that：In described Between the left and right sides of outer cylindrical body be equipped with upper inner prop latch assembly and pin hole to realize intermediate outer cylindrical body and upper inner cylinder Pin is solid.

5. auxiliary leg before Large span bridging machine variable-span multi-stage expansion as described in claim 1, it is characterised in that：Under described Lifting device includes lower inner cylinder, lower lifting cylinder and lower beam, and the lower inner cylinder is two and upper end slidably places Intracavitary in the hollow posts of intermediate outer cylindrical body, lower beam is fixed in lower end, and one end of the lower lifting cylinder and intermediate outer cylindrical body are cut with scissors It connects, the other end is hinged with lower beam.

6. auxiliary leg before Large span bridging machine variable-span multi-stage expansion as claimed in claim 5, it is characterised in that：It is additionally provided with Lower inner prop latch assembly, the lower inner prop latch assembly are two and are symmetrically arranged at left and right sides of intermediate outer cylindrical body, each lower interior Column latch assembly respectively corresponds inner cylinder, and the two sides of the intermediate outer cylindrical body are respectively equipped with to be inserted into for lower inner prop latch assembly Pin hole, it is solid to carry out positioning pin by lower inner prop latch assembly that multiple location holes are equipped at intervals on the lower inner cylinder.

7. auxiliary leg before Large span bridging machine variable-span multi-stage expansion as described in claim 1, it is characterised in that：On described Crossbeam left and right ends are additionally provided with upper beam latch assembly, and the left and right end face of the upper beam is equipped with and upper beam latch assembly pair The pin hole answered and can be hinged by upper beam latch assembly and crane's major girder.

8. auxiliary leg before Large span bridging machine variable-span multi-stage expansion as described in claim 1, it is characterised in that：On described Conversion sleeve and upper beam pass through manual pin shaft and upper inner cylinder carries out pin joint.