CN111335182A - Portable single-rail bridge girder erection machine and steel column and steel girder installation method in bridge erecting process - Google Patents

Abstract

The invention discloses a portable single-track bridge erecting machine and a method for installing steel columns and steel beams in the process of erecting the bridge. The bridge erecting machine includes a base frame, a suspension, a slewing mechanism, a hoisting assembly and a steering seat; the steering seat includes a seat The main body, the driving mechanism and the guiding mechanism, the driving mechanism is installed in the seat body, the guiding mechanism is installed under the seat body, the steering seat is placed on the erected steel beam with the driving mechanism, and the guiding mechanism is clamped on both sides of the steel beam. The steel beam slides in the length direction; the base frame is installed on the base body through the outrigger, the slewing mechanism is installed on the erected steel column cover beam through the outrigger, and the height of the outrigger is adjustable; the suspension is hinged with the base frame through the slewing mechanism, and the hoisting system It is installed under the base frame and suspension. The angle between the base frame and the suspension support can be adjusted through the slewing mechanism, the angle between the base frame and the erected steel beam can be adjusted through the steering seat, and the slope can be adjusted through the outriggers, thereby reducing the requirements for the curve radius in the plane, while It can be applied to the working condition of small flat curve radius.

Description

Portable single-track bridge erection machine and installation method of steel columns and steel beams during bridge erection

technical field

The invention belongs to the technical field of hoisting equipment and its construction, in particular to a portable single-track bridge erecting machine and a method for installing steel columns and steel beams in the process of erecting bridges.

Background technique

The bridge erection machine is a device that places the prefabricated beams on the prefabricated piers. The bridge erection machine belongs to the category of cranes, because its main function is to lift the beam pieces, then transport them to the position and put them down.

But the bridge erection machine is very different from the crane in the general sense. The required conditions are harsh, and there is running on the beam, or longitudinal movement. The bridge erection machine is divided into several types, such as erecting highway bridges, conventional railway bridges, and passenger railway bridges. At present, the conventional straddle type monorail bridge erection machine can use the constructed piers to carry out the hoisting operation of the prefabricated beams.

However, this kind of bridge erection machine is bulky and slow in construction; it cannot complete the installation of piers and columns; it cannot be applied to the case where the radius of the horizontal curve is small.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a portable single-track bridge erecting machine suitable for the working condition of small flat curve radius and a method for installing steel columns and steel beams in the process of erecting bridges, aiming at the deficiencies of the prior art.

The portable single-track bridge erecting machine provided by the present invention includes a base frame, a suspension, a slewing mechanism, a hoisting assembly and a steering seat; the steering seat includes a seat main body, a driving mechanism and a guiding mechanism, and the driving mechanism is installed on the seat main body. Inside, the guiding mechanism is installed under the main body of the seat, the steering seat is placed on the erected steel beam with the driving mechanism, the guiding mechanism is clamped on both sides of the steel beam, and can slide along the length direction of the steel beam; the base frame is installed on the seat through the outriggers On the main body, the slewing mechanism is installed on the erected steel column cover beam through outriggers, and the height of the outriggers is adjustable; the suspension is hinged with the base frame through the slewing mechanism, and the hoisting assembly is arranged under the base frame and the suspension.

In a specific embodiment, the seat body is an I-shaped seat, comprising a pair of side plates and a pair of web plates welded between the two side plates, the web plates are fixedly connected to the top plate, and the top plate is flanged to connect the steering beam, A row of mounting holes is arranged under the side plate in the outer region of the web; the base frame is mounted on the steering beam through outriggers.

Preferably, the drive mechanism includes a variable frequency deceleration motor and a pulley, the pulley includes an axle and a pair of wheel bodies connected to the outside of the axle; the pulley is placed between a pair of webs, the frequency conversion deceleration motor is installed outside the web, and the output shaft extends It is connected with the axle in the web, and the other end of the axle is connected with the web through the bushing.

In order to use different beam widths, the guide mechanism includes a guide seat and a guide wheel. A pair of guide wheels are arranged up and down and connected to the inner side of the guide seat; the guide mechanism is detachably connected to a row of the side plate with the top of the guide seat. Under the hole, the distance between the two guide seats at the same end can be adjusted, and a connecting shaft is arranged between the two guide seats on the same side; the bottom end of the guide seat is provided with an automatic locking device to prevent the steering seat from being separated from the steel beam.

In a specific embodiment, the base frame and the suspension are both trusses, and the truss includes a plurality of segments that are detachably connected; the rear end of the base frame and the front end of the suspension are both provided with support connecting frames.

In order to improve the connection reliability, the support connection frame is a rectangular frame with one end open, the open end beam is provided with a notch to be assembled with the slewing mechanism, the external support leg mounting seat is installed, and the other end is detachably connected to the truss .

As a matching solution for improving connection reliability, the slewing mechanism includes a slewing support assembly and a slewing joint; the slewing support assembly includes an upper support, a lower support and a connecting column; the slewing joint includes a vertical seat and a slewing support arranged at the upper and lower ends of the vertical seat; A pair of slewing joints are respectively assembled with the slewing support assembly with the inner end of the slewing support, and the outer end of the slewing support is clamped into the slot to be fixedly connected.

In a specific embodiment, the hoisting assembly includes a hoist beam and a hoisting device, the hoist beam is fixed under the base frame and the suspension, and the hoisting device is arranged under the hoist beam.

In order to facilitate visualization, an infrared camera is provided at the front end of the suspension.

The present invention also provides a method for installing a steel column and a steel beam in the process of bridging. The method uses the above-mentioned bridging machine as a tool, and includes the following steps:

Step 1. Use the installation of two-span steel beams at the starting point of project installation, and place the assembled portable single-track bridge erecting machine on the erected steel beams;

Step 2: Adjust the center line of the middle outrigger through the steering seat to coincide with the center line of the steel column cover beam, and then anchor the bottom flange of the outrigger on the cover beam;

Step 3. Slowly rotate the slewing mechanism to adjust the position of the suspension so that its axis coincides with the center point of the steel column to be installed in the next span;

Step 4, hoisting the steel column: transport the steel column to be installed in the next span to the base frame, use the hoisting assembly to hoist the steel column and hoist the steel column to the suspension for installation;

Step 5. Lift the steel beam: After the steel column is installed in place, transport the steel beam to be installed in the next span to the base frame, use the lifting assembly to lift the steel column and hoist the steel column to the suspension for installation;

Step 6. Move the bridge erecting machine forward: After the steel beam is installed in place, rotate the suspension back to make the entire bridge erecting machine straight, loosen the anchor flange of the middle outrigger, adjust the height of each outrigger, and lower the bridge erection. After the center of gravity of the machine, it walks forward through the steering seat, and drives the bridge erecting machine to move forward to the next span;

Step 7. After the bridge erection machine is moved forward, adjust the height of the outriggers, repeat steps 2 to 6, and cycle erection.

During the use of the present invention, the angle between the base frame and the suspension support can be adjusted through the slewing mechanism, the angle between the base frame and the erected steel beam can be adjusted through the steering seat, and the slope can be adjusted through the outrigger, so that it can be applied to The working condition with a certain longitudinal curve slope can reduce the requirement for the curve radius in the plane, so it is suitable for the working condition with a small flat curve radius.

Description of drawings

FIG. 1 is a schematic diagram of a use state of a preferred embodiment of the present invention.

FIG. 2 is an enlarged schematic view of the assembly of the steering seat and the steel beam in the preferred embodiment.

FIG. 3 is an enlarged three-dimensional schematic diagram of the assembly of the steering seat and the steel beam in the preferred embodiment.

FIG. 4 is an enlarged schematic perspective view of the seat body in the preferred embodiment. (steering beam not shown)

FIG. 5 is an enlarged schematic three-dimensional view of the support connection frame in the preferred embodiment.

FIG. 6 is an enlarged schematic three-dimensional view of the slewing mechanism in the preferred embodiment.

Icon serial number:

1—base frame;

2—Suspension;

3—slewing mechanism, 31—slewing support assembly, 32—slewing joint;

4—hoisting assembly, 41—crane beam, 42—hoisting equipment;

5—steering seat,

51—main body, 511—side plate, 512—web plate, 513—top plate, 514—steering beam,

52—drive mechanism, 521—variable frequency reduction motor, 522—pulley,

53—guide mechanism, 531—guide seat, 532—guide wheel, 533—connecting shaft;

6—Removable operating platform;

7—outrigger;

8—support connection frame, 81—notch;

A—steel beam; B—cover beam; C—steel column.

Detailed ways

As shown in FIG. 1 , the portable single-track bridge erection machine provided in this embodiment includes a base frame 1, a suspension 2, a slewing mechanism 3, a hoisting assembly 4, a steering seat 5 and a movable operating platform 6, wherein The base frame is installed on the erected steel beam A through the steering seat 5, the slewing mechanism 3 is installed on the erected steel column cover beam B through the outrigger 7, and the suspension is hinged with the base frame 1 through the slewing mechanism 3, The hoisting assembly 4 is arranged under the base frame and the suspension, and the movable operating platform 6 is arranged under the front end of the suspension and can move forward and backward to complete the installation of the steel beam.

As shown in FIGS. 2 and 3 , the steering seat 5 includes a seat body 51 , a drive mechanism 52 and a guide mechanism 53 . As shown in FIG. 4 , the seat body 51 is an I-shaped seat, which includes a pair of side plates 511 and a pair of web plates 512 welded between the two side plates. The top plate 513 is fixedly connected to the web plates, and the steering beam is flanged on the top plate. 514, the side plate 511 is a grooved plate, the bottom of which is located in the outer area of the web, and a row of mounting holes is provided for mounting the guide mechanism 53, and a pair of through holes are provided on the web for mounting the driving mechanism 52. The driving mechanisms 52 are arranged in pairs and are respectively arranged on a pair of webs. The driving mechanism includes a variable frequency deceleration motor 521 and a pulley 522. The pulley includes an axle and a pair of wheel bodies connected to the outside of the axle; The variable frequency deceleration motor is installed outside the web, the output shaft extends into the web and is connected with the axle, and the other end of the axle is connected with the web through a bushing. The guide mechanism 53 includes a guide seat 531 and a guide wheel 532. A pair of guide wheels are arranged up and down and connected to the inner side of the guide seat; a row of through holes is set on the top plate of the guide seat, and the guide seat is placed under the side plate. The bolts of the mounting holes are fastened with the corresponding nuts, and the distance between the two guide seats on the same end can be adjusted by adjusting different hole positions. A connecting shaft 533 is set between the two guide seats on the same side to improve the synchronization. The bottom end of the guide seat 531 is provided with an automatic locking device 533, which can prevent the steering seat from breaking away from the erected steel beam in an accident, causing the bridge erecting machine to overturn as a whole. A pair of steering seats 5 are arranged on the steel beam A to install the base frame 1. The steering seat is placed on the top surface of the steel beam with pulleys, and the guide wheels are clamped on both sides of the steel beam. Walking on the steel beam drives the base frame 1 to move, which can realize walking and braking at any speed, and improve the stability and reliability of walking by clamping the wire through the guide wheel.

As shown in FIG. 1 , both the base frame 1 and the suspension 2 are trusses, and the truss includes a plurality of segments that can be detachably connected; the rear end of the base frame and the front end of the suspension are provided with a support connection frame 8 . As shown in FIG. 5 , the support connection frame 8 is a rectangular frame with one end open. The open end beam is provided with a notch 81 to be assembled with the slewing mechanism, and the external support leg mounting seat is provided, and the other end is detachably connected to the truss. One end of the base frame is mounted on the steering beam through a pair of outriggers, and the other end is connected with the support connecting frame, which is assembled with the steering beam of the other steering seat through the outriggers. The base frame 1 and the suspension 2 are assembled with the slewing mechanism 3 through the support connection frame 8 .

As shown in FIG. 6, the slewing mechanism 3 includes a slewing support assembly 31 and a slewing joint 32; the slewing support assembly includes an upper support, a lower support and a connecting column; the slewing joint includes a vertical seat and a slewing support arranged at the upper and lower ends of the vertical seat; a pair of The slewing joints are respectively assembled on the slewing support assembly with the inner end of the slewing support, and the outer end of the slewing support is clipped into the notch and is fixedly connected with the support connecting frame 8 . The slewing mechanism 3 can bear the hoisting load and eccentric load of the bridge erecting machine on the steel column cover beam B through a pair of outriggers 7 arranged under the connecting column; the outriggers are selected from hydraulic cylinders.

In the actual use process, according to the working conditions, an integrated hydraulic station can be added in the truss structure to control the lifting and lowering of the outriggers, and a gasoline generator can be placed in the truss structure to meet the power demand of the bridge erection machine. 36V control system is used for hoisting, lifting and walking. Install an infrared camera and sighting device at the front end of the truss, and by connecting a video display, you can observe the alignment of the bridge erecting machine and the center of the base structure where the steel column is to be installed. At the same time, the display can observe the situation around the hoisting structure to ensure the safety of installation operations.

The hoisting assembly 4 includes a hoisting beam 41 and a hoisting device 42. The hoisting beam is welded under the base frame and the suspension, and four hoisting devices are arranged under the hoisting beam to hoist the steel beam and the steel column.

When using this bridge erection machine for steel beam and steel column construction, the specific methods are as follows:

1. First erect the initial two-span steel girder A, steel column C and cover girder B, and assemble the bridge erection machine; use the truck crane and other equipment to install the two-span steel girder at the starting point of the project installation, and assemble the bridge erection machine as a whole , placed on a steel beam.

2. Next, anchor the outriggers; adjust the centerline of the outriggers to coincide with the centerline of the steel column cover beam through the movement of the bogie, extend the hydraulic cylinder, and anchor the bottom flange of the outrigger on the cover beam.

3. Then adjust the position of the suspension, and adjust the position of the suspension by slowly rotating the rotary structure, so that the axis coincides with the center point of the steel column to be installed in the next span.

4. Then hoist the steel column: transport the steel column to be installed in the next span from the installation starting point to the tail of the base frame of the bridge erection machine through the beam transport trolley, use the hoisting assembly to hoist the steel column, and hoist the steel column to the bottom of the suspension. Steel column installation.

5. Re-hoist the steel beam: After the steel column is installed in place, the steel beam to be installed in the next span is transported from the installation starting point to the base frame by the beam transport trolley, and the steel beam is lifted by the hoisting assembly, and the steel beam is hoisted to the suspension. Perform steel beam installation.

6. Move the bridge erecting machine forward: after the steel beam is installed in place, rotate the suspension back to make the entire bridge erecting machine straight, loosen the anchoring flange of the middle outrigger, adjust the height of all outriggers, and set the The center of gravity of the bridge erecting machine is lowered, and the bogie is controlled to move forward, which drives the bridge erecting machine to move forward to the next span.

Finally, after the bridge erection machine is moved forward, adjust the height of the outriggers, repeat the operations 2-6, and then the cyclic erection can be carried out.

During the use of the present invention, the angle between the base frame and the suspension support can be adjusted through the slewing mechanism, the angle between the base frame and the erected steel beam can be adjusted through the steering seat, and the slope can be adjusted through the outrigger, so that it can be applied to The working condition with a certain longitudinal curve slope can reduce the requirement for the curve radius in the plane, so it is suitable for the working condition with a small flat curve radius.

Claims (10)

1. A portable monorail bridge girder erection machine is characterized in that: the device comprises a base frame, a suspension, a swing mechanism, a hoisting assembly and a steering seat;

the steering seat comprises a seat main body, a driving mechanism and a guide mechanism, wherein the driving mechanism is arranged in the seat main body, the guide mechanism is arranged below the seat main body, the steering seat is arranged on the erected steel beam through the driving mechanism, and the guide mechanism is clamped on two sides of the steel beam and can slide along the length direction of the steel beam;

the base frame is arranged on the seat main body through the supporting legs, the swing mechanism is arranged on the erected steel column cover beam through the supporting legs, and the height of the supporting legs is adjustable;

the suspension is hinged with the base frame through a swing mechanism, and the hoisting assembly is arranged below the base frame and the suspension.

2. The portable monorail bridge crane of claim 1, wherein: the seat main body is an I-shaped seat and comprises a pair of side plates and a pair of webs welded between the two side plates, a top plate is fixedly connected onto the webs, a steering cross beam is connected onto the top plate through a flange, and a row of mounting holes are formed in the area, located outside the webs, below the side plates; the pedestal is mounted on the steering cross beam through the support legs.

3. The portable monorail bridge crane of claim 2, wherein: the driving mechanism comprises a variable-frequency speed reducing motor and a pulley, and the pulley comprises a wheel shaft and a pair of wheel bodies connected to the outside of the wheel shaft; the pulley is arranged between the pair of webs, the variable-frequency speed reduction motor is arranged outside the webs, the output shaft extends into the webs and is connected with the wheel shaft, and the other end of the wheel shaft is connected with the webs through the shaft sleeve.

4. The portable monorail bridge crane of claim 2, wherein: the guide mechanism comprises a guide seat and guide wheels, and the pair of guide wheels are vertically arranged and connected to the inner side of the guide seat; the guide mechanism is detachably connected below the row of mounting holes of the side plate by the top end of the guide seat, so that the distance between the two guide seats at the same end is adjustable, and a connecting shaft is arranged between the two guide seats at the same side; the bottom of guide holder sets up automatic locking means to prevent to turn to the seat and break away from the girder steel.

5. The portable monorail bridge crane of claim 1, wherein: the base frame and the suspension frame are both trusses, and each truss comprises a plurality of sections which are detachably connected; the rear end of the base frame and the front end of the suspension frame are both provided with a supporting connecting frame.

6. The portable monorail bridge crane of claim 5, wherein: the support connecting frame is a rectangular frame with one open end, a notch is formed in a cross beam at the open end so as to be assembled with the swing mechanism, a supporting leg mounting seat is arranged outside the notch, and the other end of the support connecting frame is detachably connected with the truss.

7. The portable monorail bridge crane of claim 6, wherein: the slewing mechanism comprises a slewing support assembly and a slewing joint; the rotary support component comprises an upper support, a lower support and a connecting upright post; the rotary joint comprises a vertical seat and rotary supports respectively arranged at the upper end and the lower end of the vertical seat; the pair of rotary joints are assembled with the rotary support component by the inner ends of the rotary supports respectively, and the outer ends of the rotary supports are clamped into the notches to be fixedly connected.

8. The portable monorail bridge crane of claim 1, wherein: the hoisting assembly comprises a crane beam and hoisting equipment, the crane beam is fixed under the base frame and the suspension, and the hoisting equipment is arranged under the crane beam.

9. The portable monorail bridge crane of claim 1, wherein: the front end of the suspension is provided with an infrared camera, and a movable operating platform is arranged below the front end.

10. A method for installing steel columns and steel beams in a bridge erecting process, which is characterized in that the method uses the bridge erecting machine as claimed in any one of claims 1 to 9 as a tool and comprises the following steps:

step one, mounting two-span steel beams at a project mounting starting point, and placing the assembled portable single-rail bridge girder erection machine on the erected steel beams;

step two, adjusting the center line of the middle supporting leg to be superposed with the center line of the steel column bent cap through a steering seat, and anchoring a flange at the bottom of the supporting leg on the bent cap;

step three, slowly rotating and adjusting the position of the suspension through a slewing mechanism to enable the axis of the suspension to be superposed with the central point of the steel column to be installed in the next span;

step four, hoisting the steel column: transporting the steel column to be installed in the next span to the position below the base frame, hoisting the steel column by using the hoisting assembly, and hoisting the steel column to the position below the suspension frame for installation;

step five, hoisting the steel beam: after the steel column is installed in place, a steel beam to be installed in the next span is conveyed to the position below the base frame, the steel column is hoisted by utilizing the hoisting assembly and is hoisted to the position below the suspension frame for installation;

step six, forward moving a bridge girder erection machine: after the steel beam is installed in place, the suspension is rotated to return, so that the whole bridge girder erection machine keeps a straight line, the anchoring flange of the middle supporting leg is loosened, the height of each supporting leg is adjusted, the center of gravity of the bridge girder erection machine is lowered and then the bridge girder erection machine is driven to move forwards to the next span to be in place;

and step seven, after the bridge girder erection machine moves forwards to be in place, adjusting the height of the supporting legs, repeating the step two to the step six, and circularly erecting.

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