CN111335182A - Portable single-rail bridge girder erection machine and steel column and steel girder installation method in bridge erecting process - Google Patents
Portable single-rail bridge girder erection machine and steel column and steel girder installation method in bridge erecting process Download PDFInfo
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- CN111335182A CN111335182A CN202010305819.4A CN202010305819A CN111335182A CN 111335182 A CN111335182 A CN 111335182A CN 202010305819 A CN202010305819 A CN 202010305819A CN 111335182 A CN111335182 A CN 111335182A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a portable single-rail bridge girder erection machine and a method for installing a steel column and a steel beam in the process of bridge erection, wherein the bridge girder erection machine 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. The included angle between the base frame and the suspension bracket is adjusted through the swing mechanism, the angle between the base frame and the erected steel beam can be adjusted through the steering seat, and the gradient is adjusted through the supporting legs, so that the requirement on the radius of the curve in the plane can be reduced, and the suspension device is suitable for the working condition of the radius of the small flat curve.
Description
Technical Field
The invention belongs to the technical field of hoisting equipment and construction thereof, and particularly relates to a portable single-rail bridge girder erection machine and a method for installing steel columns and steel beams in a bridge erection process.
Background
The bridge girder erection machine is equipment for placing prefabricated beam pieces on a prefabricated bridge pier. Bridge girder erection machines belong to the crane category, as their main function is to lift the beam piece up and then transport it into position and put it down.
The bridge girder erection machine is very different from a general crane. The required conditions are harsh, and the beam piece runs upwards or is called longitudinal movement. The bridge girder erection machine is divided into a highway bridge erection machine, a conventional railway bridge erection machine, a passenger-dedicated railway bridge erection machine and the like. At present, the conventional straddle type monorail bridge girder erection machine can utilize constructed piers to carry out the hoisting operation of precast beams.
However, the bridge girder erection machine is heavy and has low construction speed; the installation of the pier stud cannot be completed; the case where the radius of the flat curve is small cannot be applied.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a portable single-rail bridge girder erection machine suitable for working conditions with small flat curve radius and a method for installing steel columns and steel girders in the process of erecting bridges.
The invention provides a portable single-rail bridge girder erection machine, which 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.
In one specific embodiment, the seat main body is an I-shaped seat and comprises a pair of side plates and a pair of webs welded between the side plates, a top plate is fixedly connected to the webs, a steering cross beam is connected to 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.
Preferably, 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.
In order to use different beam widths, the guide mechanism comprises a guide seat and guide wheels, wherein 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 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.
In one embodiment, the base frame and the hanger bracket are each a truss comprising a plurality of segments that 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.
In order to improve the connection reliability, 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.
As a matching scheme for improving the connection reliability, 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.
In one embodiment, the hoist assembly includes a crane beam fixed under the pedestal and the suspension, and a hoisting device disposed under the crane beam.
In order to realize visualization, an infrared camera is arranged at the front end of the suspension.
The invention also provides a method for installing the steel column and the steel beam in the process of erecting the bridge, which uses the bridge erecting machine 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.
When the invention is used, the included angle between the base frame and the suspension bracket can be adjusted through the swing mechanism, the angle between the base frame and the erected steel beam can be adjusted through the steering seat, and the gradient can be adjusted through the supporting legs, so that the invention can be suitable for the working condition with a certain longitudinal curve gradient, and can reduce the requirement on the curve radius in a plane, thereby being suitable for the working condition with a small flat curve radius.
Drawings
Fig. 1 is a schematic view of a state of use of a preferred embodiment of the present invention.
Fig. 2 is an enlarged view of the assembly of the steering seat and the steel beam in the preferred embodiment.
Fig. 3 is an enlarged perspective view of the assembly of the steering seat and the steel beam in the preferred embodiment.
Fig. 4 is an enlarged perspective view of the seat main body in the preferred embodiment. (steering beam not shown)
Fig. 5 is an enlarged perspective view of the support link in the preferred embodiment.
Fig. 6 is an enlarged perspective view of the swing mechanism in the preferred embodiment.
Sequence numbers of the drawings:
1-a base frame;
2, a suspension;
3-slewing mechanism, 31-slewing support assembly, 32-slewing joint;
4-hoisting assembly, 41-crane beam, 42-hoisting equipment;
5-a turning seat is arranged on the steering wheel,
51-seat main body, 511-side plate, 512-web plate, 513-top plate, 514-steering beam,
52-driving mechanism, 521-variable frequency speed reducing motor, 522-pulley,
53-a guide mechanism, 531-a guide seat, 532-a guide wheel and 533-a connecting shaft;
6, a movable operation platform;
7-a support leg;
8-supporting connecting frame, 81-notch;
a-a steel beam; b, a cover beam; c, steel column.
Detailed Description
As shown in fig. 1, the portable single-track bridge girder erection machine provided by this embodiment includes a base frame 1, a suspension 2, a swing mechanism 3, a hoisting assembly 4, a steering seat 5 and a movable operating platform 6, wherein the base frame is mounted on a steel beam a to be erected through the steering seat 5, the swing mechanism 3 is mounted on a steel column cover beam B to be erected through a support leg 7, the suspension is hinged to the base frame 1 through the swing mechanism 3, the hoisting assembly 4 is disposed under the base frame and the suspension, and the movable operating platform 6 is disposed under the front end of the suspension and can move back and forth to complete the steel beam mounting operation.
As shown in fig. 2 and 3, the steering seat 5 includes a seat main body 51, a drive mechanism 52, and a guide mechanism 53. As shown in fig. 4, the seat main body 51 is an i-shaped seat, and includes a pair of side plates 511 and a pair of webs 512 welded between the side plates, a top plate 513 is fixedly connected to the webs, the top plate is flanged to a steering cross beam 514, the side plates 511 are trough-shaped plates, a row of mounting holes are formed in the bottom of the side plates in the area outside the webs for mounting the guiding mechanism 53, and a pair of through holes are formed in the webs for mounting the driving mechanism 52. The driving mechanisms 52 are arranged in pairs and are respectively arranged on a pair of webs, each driving mechanism comprises a variable-frequency speed reducing motor 521 and a pulley 522, and each 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. The guide mechanism 53 includes a guide base 531 and a guide wheel 532, and a pair of guide wheels are disposed up and down and connected to the inner side of the guide base; establish one row of through-hole on the roof of guide holder, the guide holder is arranged in under the curb plate, and through the corresponding nut fastening of bolt cooperation that passes through-hole and mounting hole, realize the adjustable with both ends guide holder interval through adjusting different hole sites, sets up connecting axle 533 in order to improve the synchronism between the two guide holders of homonymy. The bottom end of the guide seat 531 is provided with an automatic locking device 533, which can prevent the steering seat from separating from the erected steel beam under the unexpected condition to cause the whole overturning of the bridge girder erection machine. A pair of seat that turns to 5 sets up and is used for installing bed frame 1 on girder steel A, turns to the seat and arranges the top surface of girder steel in with the pulley in, and the leading wheel is located the girder steel both sides and presss from both sides tightly, thereby frequency conversion gear motor drive pulley walks on the girder steel and drives bed frame 1 motion in the course of the work, can realize walking and braking at arbitrary speed, presss from both sides tight wire through the leading wheel and improves the stability and the reliability of walking.
As shown in fig. 1, the base frame 1 and the suspension 2 are each a truss comprising a plurality of segments detachably connected; the rear end of the base frame and the front end of the suspension are both provided with a supporting connecting frame 8. As shown in fig. 5, the support connection frame 8 is a rectangular frame with one open end, a notch 81 is formed on the open end beam to be assembled with the swing mechanism, a leg mounting seat is arranged outside, and the other end is detachably connected with the truss. One end of the base frame is arranged on the steering cross beam through a pair of supporting legs, the other end of the base frame is connected with the supporting connecting frame, and the supporting connecting frame is assembled with the steering cross beam of the other steering seat through the supporting legs. The base frame 1 and the suspension 2 are assembled with the swing mechanism 3 through a support connecting frame 8.
As shown in fig. 6, the swing mechanism 3 includes a swing support assembly 31 and a swing joint 32; 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 on the rotary support component by sleeving the inner ends of the rotary supports respectively, and the outer ends of the rotary supports are clamped into the notches and fixedly connected with the support connecting frame 8. The swing mechanism 3 is favorable for the steel column cover beam B to bear the hoisting load and the unbalance load of the bridge girder erection machine through a pair of supporting legs 7 arranged below the connecting upright column; the support legs adopt hydraulic cylinders.
In the actual use process, according to the operating mode, an integrated hydraulic station can be additionally arranged in the truss structure and used for controlling the lifting of the supporting legs, a gasoline generator is arranged in the truss structure and used for meeting the power requirement of the bridge girder erection machine, and a 36V control system is adopted for hoisting and walking of the bridge girder erection machine. An infrared camera and an aiming device are arranged at the front end of the truss, and the aligning condition of the bridge girder erection machine and the center of the foundation structure of the steel column to be installed can be observed by connecting a video display. Meanwhile, the display can observe the peripheral condition of the hoisting structure, and the safety during installation operation is ensured.
Hoist and mount assembly 4 includes crane beam 41 and lifting device 42, and the crane beam welds under bed frame and suspension, and four lifting device set up and are used for hoisting girder steel, steel column under the crane beam.
When the bridge girder erection machine is used for steel girder and steel column construction, the concrete method is as follows:
1. firstly, erecting an initial two-span steel beam A, a steel column C and a capping beam B, and assembling by using a bridge girder erection machine; and (4) installing two-span steel beams at the starting point of project installation by using equipment such as an automobile crane and the like, and integrally assembling the bridge girder erection machine and placing the bridge girder erection machine on the steel beams.
2. Secondly, anchoring the supporting legs; and adjusting the center line of the supporting leg to be coincident with the center line of the steel column bent cap through the movement of the bogie, extending out of the hydraulic cylinder, and anchoring the flange at the bottom of the supporting leg on the bent cap.
3. And then, the position of the suspension is adjusted, and the position of the suspension is slowly adjusted through the slow rotation of the rotary structure, so that the axis of the suspension is superposed with the central point of the next steel column to be installed.
4. Then, steel column hoisting: and (3) conveying the steel column to be installed next span to the tail part of the base frame of the bridge girder erection machine from the installation starting point through the beam conveying trolley, hoisting the steel column by using the hoisting assembly, and hoisting the steel column to the lower part of the suspension frame for installing the steel column.
5. Hoisting the steel beam: after the steel column is installed in place, the steel beam to be installed in the next span is conveyed to the position below the base frame from the installation starting point through the beam conveying trolley, the steel beam is lifted by the aid of the hoisting assembly, and the steel beam is hoisted to the suspension frame to be installed.
6. And then the bridge girder erection machine is moved forward: 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 flanges of the middle supporting legs are loosened, the heights of all the supporting legs are adjusted, the structural gravity center of the bridge girder erection machine is lowered, the bogie is controlled to move forwards, and the bridge girder erection machine is driven to move forwards to the next span to be in place.
And finally, after the bridge girder erection machine moves forwards to be in place, adjusting the height of the supporting legs, and repeating the operation of 2-6 to perform circulating erection.
When the invention is used, the included angle between the base frame and the suspension bracket can be adjusted through the swing mechanism, the angle between the base frame and the erected steel beam can be adjusted through the steering seat, and the gradient can be adjusted through the supporting legs, so that the invention can be suitable for the working condition with a certain longitudinal curve gradient, and can reduce the requirement on the curve radius in a plane, thereby being 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010305819.4A CN111335182A (en) | 2020-04-17 | 2020-04-17 | Portable single-rail bridge girder erection machine and steel column and steel girder installation method in bridge erecting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010305819.4A CN111335182A (en) | 2020-04-17 | 2020-04-17 | Portable single-rail bridge girder erection machine and steel column and steel girder installation method in bridge erecting process |
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| Publication Number | Publication Date |
|---|---|
| CN111335182A true CN111335182A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010305819.4A Pending CN111335182A (en) | 2020-04-17 | 2020-04-17 | Portable single-rail bridge girder erection machine and steel column and steel girder installation method in bridge erecting process |
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| CN (1) | CN111335182A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892542A (en) * | 2022-06-16 | 2022-08-12 | 湖南科技大学 | Supporting method and device for straddle type monorail bridge girder erection machine |
| CN114892541A (en) * | 2022-06-16 | 2022-08-12 | 湖南科技大学 | Walking and hoisting integrated straddle type single-track bridge girder erection machine |
-
2020
- 2020-04-17 CN CN202010305819.4A patent/CN111335182A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892542A (en) * | 2022-06-16 | 2022-08-12 | 湖南科技大学 | Supporting method and device for straddle type monorail bridge girder erection machine |
| CN114892541A (en) * | 2022-06-16 | 2022-08-12 | 湖南科技大学 | Walking and hoisting integrated straddle type single-track bridge girder erection machine |
| CN114892542B (en) * | 2022-06-16 | 2024-03-22 | 湖南科技大学 | Supporting method and device for straddle type monorail bridge girder erection machine |
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