CN111172895A - Foldable beam replacing machine - Google Patents

Abstract

The invention relates to the field of bridge replacement, in particular to a foldable beam replacing machine. Including the nose girder, a actuating mechanism and a stop gear, the nose girder lower extreme is provided with a pair of hanging beam dolly that is used for hanging and puts and remove the roof beam piece, the both ends of nose girder articulate respectively has the landing leg, every landing leg all including set up at the travelling car of nose girder below and respectively with nose girder and travelling car articulated support arm, be equipped with the lintel hole that is used for the roof beam piece to pass on the support arm, a actuating mechanism is used for driving the support arm and swings the lift in order to realize the nose girder for nose girder and travelling car swing, a stop gear is used for spacing the swing of support arm. The state of nose girder and travelling car is adjusted in the swing of this application accessible control support arm, and when the nose girder was in the transportation, the nose girder was located the low level to support on the travelling car, consequently can conveniently transport, when equipment needs during operation, can switch the nose girder high level into fast, thereby be convenient for accomplish the hoist and mount removal of beam piece, the efficiency of construction is high.

Description

Foldable beam replacing machine

Technical Field

The invention relates to the field of bridge replacement, in particular to a foldable beam replacing machine.

Background

With the increase of the current railway and highway operation time in China, the safety influence of the bridge aging problem on the operation of the existing line (the established line) is increasingly prominent. Some bridges are not built for a long time because the strength or rigidity of existing lines, especially main trunks, cannot meet the requirements and have to be replaced due to the continuous speed increase and the need to pass heavy-duty trains. Because some bridges are poor in manufacturing and installation quality, a part of damaged bridges are generated every year.

In addition, in our country, a large number of steel beams are used in the past railway manufacturing, the service life of the steel beams is obviously shorter than that of concrete beams, the maintenance workload of the steel beams is large, and some places cannot be maintained at all, so that part of the steel beams need to be replaced before the strength life of the steel beams is not reached. Therefore, it is urgent to research one or more safe and reliable existing railway line bridge replacement methods for different bridge forms.

The existing railway line bridge replacement method in China comprises a method for replacing existing line bridges in a fully closed mode and a method for replacing existing line bridges in an intermittent closed mode.

The totally-enclosed frame beam replacing idea is to construct temporary lines or temporary bridges near the existing railway bridges; the train passes through temporary suspension lines or temporary bridges, and bridge replacement is performed by using bridge erecting machines and other modes. The operation mode does not need to interrupt driving, is suitable for bridges in riverways or valleys, but needs to construct temporary lines or temporary bridges, has high cost and needs to limit speed when long-time trains pass the temporary lines (temporary bridges), needs to carry out point construction when the temporary lines are butted with the main lines and the main lines are butted with the main lines, and simultaneously frequently disturbs the lines, so that the instability of roadbeds and road beds is caused, the speed limiting time is long, and the influence on the main point operation of the trains is large; the construction and dismantling of the toilet bowl has great influence on the environment.

The idea of discontinuously sealing the frame-changing beam is to use a gantry crane or a bracket transverse moving scheme and other schemes to implement bridge frame-changing operation by adjusting a train operation diagram or a train operation gap. The operation mode does not need to build an excrement line, has low cost and no environmental pollution; the preparation time is short, and the bridge replacement work can be carried out in a short time; the disturbance to the existing line is small, and the normal operation can be recovered within a short time after the frame replacement is finished. The preparation work is carried out on line, has no interference to the existing line, but cannot be applied to the bridge at the upper part of the valley or the river. The intermittent closing for replacing the existing bridge is realized, and no temporary line for the vehicle to go around is provided, so the safety reliability of the equipment and the closing time are important in the scheme.

For the existing problems, a set of brand-new railway beam bridge frame-replacing construction technology and equipment which are applicable to various bridge pier heights or underbridge topography and landform needs to be provided urgently, a new thought and method are provided for the bridge frame-replacing engineering, and the frame-replacing construction of the whole-hole beam can be safely and efficiently completed in a 'skylight point' on the premise of minimum interference on original line equipment.

Disclosure of Invention

The invention aims to provide a foldable beam changing machine, which at least solves part of technical problems mentioned in the background technology.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a folded cascade trades roof beam machine, including the nose girder, a drive mechanism and a stop gear, the nose girder lower extreme is provided with a pair of hanging beam dolly that is used for hanging and puts and remove the roof beam piece, the both ends of nose girder articulate respectively has the landing leg, every landing leg all including set up the travelling car in the nose girder below and respectively with nose girder and travelling car articulated support arm, be equipped with the lintel hole that is used for the roof beam piece to pass on the support arm, a drive mechanism is used for driving the support arm and swings the lift in order to realize the nose girder for nose girder and travelling car, a stop gear is used for spacing the swing of support arm.

Preferably, the support leg and the guide beam form a first rotating shaft, the support leg and the movable trolley form a second rotating shaft, and the first rotating shaft and the second rotating shaft are in a horizontal state and perpendicular to the length direction of the guide beam.

Preferably, each support arm comprises a first rotating shaft, a second rotating shaft and a pair of support units, the first rotating shaft is rotatably arranged on the guide beam, the second rotating shaft is rotatably arranged on the movable trolley, the first rotating shaft and the second rotating shaft are connected through the pair of support units, the lintel hole is formed between the pair of support units, and the first rotating shaft and the second rotating shaft are horizontally arranged and perpendicular to the length direction of the guide beam.

Preferably, the guide beam is provided with first connecting seats corresponding to the two first rotating shafts, the mobile trolley is provided with second connecting seats corresponding to the two second rotating shafts, the first connecting seats and the second connecting seats are provided with rotating shaft holes, and the first rotating shafts and the second rotating shafts are rotatably connected in the corresponding rotating shaft holes.

Preferably, the first connecting seat is connected with a third driving mechanism, and the first connecting seat moves along the length direction of the first rotating shaft through the third driving mechanism.

Preferably, the first limiting mechanism is a first pin shaft, a corresponding first connecting seat and the first rotating shaft are provided with a pin hole for inserting the first pin shaft, the first driving mechanism is a telescopic rod, one end of the telescopic rod is hinged with the supporting unit, and the other end of the telescopic rod is hinged with a third connecting seat arranged on the guide beam or the moving trolley.

Preferably, the first connecting seat is arranged at the upper end of the guide beam, and the two ends of the guide beam are provided with first extension sections.

Preferably, each supporting unit comprises a pair of first supporting parts and a second supporting part, the pair of first supporting parts are respectively arranged on the end parts of the same sides of the first rotating shaft and the second rotating shaft and are respectively hinged with the corresponding first rotating shaft and the second rotating shaft, one ends, far away from the guide beam, of the two first supporting parts are connected through the second supporting parts, the supporting units are connected with a second driving mechanism and a second limiting mechanism, the second driving mechanism is used for driving the first supporting parts to swing relative to the guide beam and the movable trolley so as to adjust the distance between the second supporting parts relative to the guide beam and the movable trolley, and the second limiting mechanism is used for limiting the swing of the first supporting parts.

Preferably, the third connecting seat sets up on the travelling car, and the one end and the second supporting part of telescopic link are articulated, and the other end and the third connecting seat of telescopic link are articulated, and the pivot hole has all been seted up with the junction of telescopic link to the third connecting seat, and the third connecting seat is articulated through the pluggable round pin axle that sets up in the pivot hole with the telescopic link.

Preferably, the third connecting seat sets up on the nose girder, and the one end of telescopic link is articulated with the first articulated seat that sets up on the second supporting part, and the pivot hole has all been seted up with the junction of telescopic link to first articulated seat, and first articulated seat is articulated through the pluggable round pin axle that sets up in the pivot hole with the telescopic link.

Has the advantages that: the state of nose girder and travelling car is adjusted in the swing of this application accessible control support arm, and when the nose girder was in the transportation, the nose girder was located the low level to support on the travelling car, consequently can conveniently transport, when equipment needs during operation, can switch the nose girder high level into fast, thereby be convenient for accomplish the hoist and mount removal of beam piece, the efficiency of construction is high.

Drawings

Figure 1 is a schematic view of the apparatus of the present invention in place.

Fig. 2 is a schematic view of the guide beam of the present invention raised and deployed.

Fig. 3 is a schematic illustration of the removal of a used beam in the present invention.

Fig. 4 is a schematic view of the installation of the new beam of the present invention.

Fig. 5 is a schematic view of the apparatus of the present invention in a pull-out position.

Fig. 6 is a schematic view of the present invention placed on a beam sheet.

Fig. 7 is a schematic structural view of the third connecting seat arranged on the moving trolley.

Fig. 8 is a schematic view of the structure of the support arm of the present invention.

Fig. 9 is a schematic structural view of the supporting unit of the present invention.

Fig. 10 is a schematic view of a transport state of one of the present invention.

Fig. 11 is a schematic structural view of a third connecting seat arranged on a guide beam in the invention.

Fig. 12 is a schematic view of a lower structure of the guide beam in a transport position according to an embodiment of the invention.

Fig. 13 is a schematic structural view of the guide beam in a high position according to an embodiment of the present invention.

Fig. 14 is a schematic structural view illustrating that the swing arm drives the telescopic rod to lift in one embodiment of the present invention.

Reference numerals:

1. a guide beam; 101. a first connecting seat; 102. a first extension segment; 2. moving the trolley; 201. a second connecting seat; 301. a first rotating shaft; 302. a second rotating shaft; 303. a first support section; 304. a second support portion; 305. a third rotating shaft; 306. a second extension segment; 401. a first drive mechanism; 402. a first limit mechanism; 501. a second drive mechanism; 502. a second limiting mechanism; 601. a first girder transporting special line; 602. a second girder transporting special line; 7. a hanging beam trolley; 8. a third connecting seat; 801. a first hinge mount; 802. a second hinge mount; 803. a rotating shaft; 804. swinging arms; 805. a stress block; 806. a limiting block; 807. a winch; 808. a connecting rod; 9. and a third drive mechanism.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.

Referring to fig. 6-9, the application provides a foldable beam changing machine, including guide beam 1, first actuating mechanism 401 and first stop gear 402, guide beam 1 lower extreme is provided with a pair of hanging beam dolly 7 that is used for hanging and putting and moving the roof beam piece, guide beam 1's both ends articulate respectively has the landing leg, every landing leg all includes the travelling car 2 that sets up in guide beam 1 below and the support arm articulated with guide beam 1 and travelling car 2 respectively, be equipped with the lintel hole that is used for the roof beam piece to pass on the support arm, first actuating mechanism 401 is used for driving the support arm and swings in order to realize the lift of guide beam 1 for guide beam 1 and travelling car 2, first stop gear 402 is used for spacing the swing of support arm.

In the scheme, the guide beam 1 is of a strip structure, the length direction of the guide beam is consistent with the length direction of a bridge, the guide beam is supported by supporting legs at two ends of the guide beam and is arranged above a hole site to be replaced, the lower end of the guide beam 1 is provided with a pair of hanging beam trolleys 7, the hanging beam trolleys 7 are in the prior art, the hanging beam trolleys 7 are movably clamped with the guide beam 1, each hanging beam trolley 7 is provided with a travelling mechanism and a hoisting mechanism, the travelling mechanism can travel along the length direction of the guide beam 1, the hoisting mechanism can be used for hoisting a heavy object, therefore, the hanging beam trolleys 7 can hoist and transfer a beam piece, and the beam piece passes through a beam passing hole to pass through the supporting arm in the transferring process.

The supporting arms are respectively hinged with the guide beam 1 and the movable trolley 2, so under the action of external force, the supporting arms can realize the swinging function, before transportation, preferably, the initial states of the two supporting arms are in a contraction state and are parallel to each other, when the movable trolley 2 moves to an existing bridge on two sides of a hole position to be replaced, the supporting arms are controlled to swing and ascend, it needs to be emphasized that the supporting arms are parallel to each other, so that the swinging directions of the supporting arms are consistent at the moment, the guide beam 1 can be driven to ascend above the hole position to be replaced, in the process, the movable trolley 2 can be limited on the existing bridge in advance, in the ascending process of the guide beam 1, only the guide beam 1 and the supporting arms move, and the movable trolley 2 is kept stable, so that the construction progress can be optimized to the greatest extent.

Alternatively, before transportation, the two support arms can swing towards the ends close to each other, the movable trolley 2 at the bottom end of the support arms are driven by the support arms to close to each other, at this time, the guide beam 1 can be placed on the movable trolley 2 and moved along the direction of the bridge under the driving action of the movable trolley 2, when the guide beam 1 is moved to the position above the hole site of the frame to be replaced, the support arms swing towards the ends away from each other, the movable trolley 2 at the bottom end of the support arms are also driven by the support arms to move away from each other, the guide beam 1 is continuously lifted along with the continuous swinging of the support arms until the guide beam 1 can provide a construction space for the construction of the hanging beam trolley 7, in the process, the movable trolley 2 also moves to the existing bridge adjacent to the hole site of the frame to be replaced due to the mutual away from each other, so that no interference is caused to the old beam dismantling of the hanging beam trolley 7, more preferably, one of the movable trolley 2 can be limited on, and the other dolly 2 moves accordingly. The movable trolley can also be connected with the corresponding special beam conveying line and provides power through the special beam conveying line.

As another alternative, before transportation, both the supporting arms may also swing towards the end away from each other, which is not described herein.

Because the guide beam 1, the support arm and the mobile trolley 2 are movably connected and have instability, after the support arm is unfolded, the position relation among the support arm and the support arm needs to be restrained by the first limiting mechanism 402, and the restraining mode can be realized by adopting a conventional technical means so as to ensure that the guide beam 1, the support arm and the mobile trolley 2 cannot rotate, for example, the support, the pin shaft and the like can be arranged. To the swing of support arm, the accessible is driven by first actuating mechanism 401, this actuating mechanism can act on nose girder 1 and support arm or travelling car 2 and support arm, through the swing of adjustment support arm for nose girder 1 or travelling car 2, thereby can realize the lift of nose girder 1, for example this first actuating mechanism 401 can be the motor, through driving nose girder 1, the rotation of articulated shaft between support arm and the travelling car 2, thereby realize the swing of support arm, first actuating mechanism 401 also can be telescopic machanism, realize the angle etc. of support arm through the angle of flexible adjustment support arm and nose girder 1 or support arm.

In order to enhance the supporting effect of the movable trolley 2 on the supporting arms, the bottom end of the movable trolley 2 can be provided with a hydraulic mechanism corresponding to the supporting arms, a cushion block can be arranged on the existing bridge or corresponding to the hydraulic mechanism, and when the movable trolley 2 is in place, the hydraulic mechanism at the bottom end extends and props against the cushion block, so that the supporting strength of the movable trolley 2 is effectively improved.

In this scheme, nose girder 1 is located the low level when the transportation, consequently can conveniently transport, and when needs during operation, can switch into the high level fast to be convenient for accomplish the hoist and mount removal of beam piece, the efficiency of construction is high.

The supporting legs and the guide beam 1 form a first rotating shaft, the supporting legs and the movable trolley 2 form a second rotating shaft, and the first rotating shaft and the second rotating shaft are in a horizontal state and perpendicular to the length direction of the guide beam 1.

In this scheme, landing leg and nose girder 1 form first axis of rotation, and the landing leg forms the second axis of rotation with travelling car 2, and above-mentioned axis of rotation is the swing centre of a circle of nose girder 1, and does not represent actual pivot, through injecing the direction of nose girder 1 swing, can accomplish the perpendicular rising or the decline of nose girder 1 to be favorable to the overall stability of structure.

Referring to fig. 8, each support arm includes a first rotating shaft 301, a second rotating shaft 302 and a pair of support units, the first rotating shaft 301 is rotatably disposed on the guide beam 1, the second rotating shaft 302 is rotatably disposed on the moving trolley 2, the first rotating shaft 301 and the second rotating shaft 302 are connected through the pair of support units, the lintel hole is formed between the pair of support units, and the first rotating shaft 301 and the second rotating shaft 302 are horizontally disposed and perpendicular to the length direction of the guide beam 1.

In this scheme, the specific structure of the supporting arm is disclosed, and the first rotating shaft 301 and the second rotating shaft 302 are arranged to enable the supporting unit to swing relative to the guide beam 1 and the movable trolley 2, so that the guide beam 1 can be supported under the supporting effect of the supporting unit, and a beam passing hole can be formed between the supporting units, thereby facilitating the passing of the beam piece.

It all is equipped with first connecting seat 101 to correspond two first pivot 301 departments on the nose girder 1, it all is equipped with second connecting seat 201 to correspond two second pivot 302 departments on travelling car 2, the pivot hole has all been seted up on first connecting seat 101 and the second connecting seat 201, first pivot 301 and second pivot 302 all rotate to be connected in corresponding pivot hole, first stop gear 402 is used for restricting the rotation of first pivot 301, first drive structure is used for driving the supporting element and swings for second connecting seat 201.

In this scheme, set up first connecting seat 101 and second connecting seat 201, realized through first connecting seat 101, second connecting seat 201 and first pivot 301, the articulated connection between the second pivot 302, can effectively strengthen the overall stability of structure.

The first connecting seat 101 is connected with a third driving mechanism, and the first connecting seat 101 moves along the length direction of the first rotating shaft 301 through the third driving mechanism.

In this embodiment, a third driving mechanism is provided, and the first connecting base 101 can move along the length direction of the first rotating shaft 301 under the driving of the third driving mechanism, that is, the guide beam 1 is driven to move along the length direction of the first rotating shaft 301, so that the position of the guide beam 1 can be properly adjusted when the curved frame is erected. The center line of the guide beam 1 can be adjusted, and therefore accurate beam falling on the curve line is completed.

The third driving mechanism can be implemented by using conventional existing equipment, for example, by using a hydraulic cylinder to push the first connecting seat 101.

The first limiting mechanism 402 is a first pin shaft, a corresponding first connecting seat 101 and the first rotating shaft 301 are provided with a pin hole for inserting the first pin shaft, the first driving mechanism 401 is a telescopic rod, one end of the telescopic rod is hinged to the supporting unit, and the other end of the telescopic rod is hinged to a third connecting seat 8 arranged on the guide beam 1 or the moving trolley 2.

In this scheme, then specifically disclose first stop gear 402 and first actuating mechanism 401, through inserting first round pin axle in the pinhole, can effectively restrict the relative rotation between first connecting seat 101 and the first pivot 301 to the swing of support arm has been restricted. And first actuating mechanism 401 is the telescopic link, and the other end of telescopic link is articulated with the third connecting seat 8 that sets up on nose girder 1 or travelling car 2, can effectually realize adjusting the angle between support arm and nose girder 1 or the travelling car 2 to drive the support arm swing, and then realize the lift of nose girder 1. It should be noted that the other ends of all the telescopic rods should be hinged to the guide beam 1 or the movable trolley 2, so as to avoid the situation that part of the telescopic rods are connected to the guide beam 1 and part of the telescopic rods are connected to the movable trolley 2 as much as possible, thereby ensuring the stability of the structure in the working process.

The first connecting seat 101 is arranged at the upper end of the guide beam 1, and the two ends of the guide beam 1 are provided with first extension sections 102.

In this scheme, the first connecting seat 101 is disposed at the upper end of the guide beam 1, so that the movement of the hanging beam trolley 7 at the lower end of the guide beam 1 is not affected, and the first extension section 102 is disposed, so that the stroke of the hanging beam trolley 7 is increased, and further the movement of the beam piece is facilitated.

Referring to fig. 9, each supporting unit includes a pair of first supporting portions 303 and a second supporting portion 304, the pair of first supporting portions 303 are respectively disposed on the end portions of the first rotating shaft 301 and the second rotating shaft 302 on the same side and are respectively hinged to the corresponding first rotating shaft 301 and the second rotating shaft 302, one ends of the two first supporting portions 303 far away from the guide beam 1 are connected through the second supporting portion 304, the supporting unit is connected to a second driving mechanism 501 and a second limiting mechanism 502, the second driving mechanism 501 is configured to drive the first supporting portion 303 to swing relative to the guide beam 1 and the moving trolley 2 so as to adjust the distance between the second supporting portion 304 and the guide beam 1 and the moving trolley 2, and the second limiting mechanism 502 is configured to limit the swing of the first supporting portion 303.

In the present embodiment, the structure of the supporting unit is specifically disclosed, and by providing the first supporting portion 303 and the second supporting portion 304, the swinging movement of the support unit with respect to the guide beam 1 and the travelling carriage 2 is achieved, since the second support 304 is arranged at the end remote from the first support 303, thus, a recess is formed between the first support portion 303 and the second support portion 304, and a new lintel hole is formed between the corresponding recesses, so that the passage of the girder can be facilitated, wherein the first support portion 303 and the second support portion 304 may each have a rod shape and form a structure similar to a C-shape, by hinging the first support part 303 with the first rotation shaft 301 and the second rotation shaft 302, the distance of the second support part 304 relative to the guide beam 1 and the travelling car 2 can be controlled, the length of the notch part of the C-shaped structure in the direction perpendicular to the bridge is changed, the width of the supporting arm is changed, and the problem that the notch part exceeds the width limit of a tunnel or a railway is effectively solved.

Set up second actuating mechanism 501 then can be used to drive first supporting part 303 and for the swing of nose girder 1 and travelling car 2, set up second stop gear 502 then can be used to carry on spacingly to the swing of first supporting part 303, thereby effectively realize the swing of supporting element, and in order to avoid causing the damage to the telescopic link when the supporting element swings, before the supporting element swings, dismantle the one end of telescopic link earlier, remove the restraint between telescopic link and nose girder 1 or the travelling car 2 promptly, reuse second actuating mechanism 501 control the swing of supporting element.

The third connecting seat 8 is arranged on the movable trolley 2, one end of the telescopic rod is hinged to the second supporting portion 304, the other end of the telescopic rod is hinged to the third connecting seat 8, a rotating shaft hole is formed in the joint of the third connecting seat 8 and the telescopic rod, and the third connecting seat 8 is hinged to the telescopic rod through a pluggable pin shaft arranged in the rotating shaft hole.

In this scheme, then specifically announced the relation of being connected between telescopic link and the third connecting seat 8, but through setting up the plug round pin axle, can use this plug round pin axle to realize the swing between support arm and the travelling car 2 as the pivot, but wobbling power then the flexible realization of accessible telescopic link, when inserting or extracting the plug round pin axle, can play again to the installation between third connecting seat 8 and the telescopic link with dismantle, and simple structure.

Referring to fig. 11 to 14, the third connecting seat 8 is disposed on the guide beam 1, one end of the telescopic rod is hinged to the first hinge seat 801 disposed on the second supporting portion 304, the connecting portion of the first hinge seat and the telescopic rod is provided with a rotating shaft hole, and the first hinge seat is hinged to the telescopic rod through a pluggable pin shaft disposed in the rotating shaft hole. The third connecting seat 8 comprises a second hinged seat 802 arranged on the top end of the guide beam 1, a rotating shaft 803 which is horizontally arranged and perpendicular to the length direction of the guide beam 1 is connected in the second hinged seat in a rotating mode, the rotating shaft 803 is driven to rotate through a fourth driving mechanism, swing arms 804 are fixed at two ends of the rotating shaft, and the other end of each telescopic rod is hinged to the corresponding swing arm 804.

In this embodiment, through setting up the pluggable round pin axle, can use this pluggable round pin axle to realize the swing between support arm and the nose girder 1 as the pivot, and wobbling power then the flexible of accessible telescopic link realizes, when inserting or extracting the pluggable round pin axle, can play again to the installation between second supporting part 304 and the telescopic link with dismantling.

In the implementation process, since the first supporting portion 303 and the second supporting portion 304 can be both rod-shaped and form a structure similar to a C-shape, the second supporting portion 304 is located at a concave portion of the C-shape structure, and one end of the telescopic rod can be connected to the first hinge seat 801 on the second supporting portion 304, and in order to increase the arm of force of the telescopic rod during operation, the first hinge seat 801 can be disposed on the second supporting portion 304 near the lower end, thereby facilitating the force application of the telescopic rod. In this embodiment, when the guide beam 1 is not lifted, the bottom end of the supporting unit may swing to a side close to the third connecting seat 8, or swing to a side far from the third connecting seat 8, and the bottom end of the supporting unit may swing to a side far from the third connecting seat 8.

Under above-mentioned state, the telescopic link reaches the farthest with the position of first articulated seat 801, and the telescopic link is located the extension state this moment, and when the telescopic link shrink, can drive the supporting element to the direction swing of being close to third connecting seat 8, until the supporting element is located vertical state, at this moment, nose girder 1 also accomplishes and goes up and down.

After the guide beam 1 rises, the supporting unit swings, so that the constraint between the telescopic rod and the guide beam 1 or the movable trolley 2 needs to be removed in advance, and in this embodiment, the pluggable pin shaft is pulled out from the first hinge seat 801.

As a preferred scheme, the third connecting seat 8 includes a second hinge seat 802 disposed at the top end of the guide beam 1, a rotation shaft 803 which is horizontally disposed and perpendicular to the length direction of the guide beam 1 is rotatably connected in the second hinge seat, the rotation shaft 803 is driven to rotate by a fourth driving mechanism, swing arms 804 are fixed at both ends of the rotation shaft, and the other end of the telescopic rod is hinged to the corresponding swing arms 804.

Through the above arrangement, can make fourth drive mechanism drive axis of rotation 803 rotatory, and then it is rotatory to drive swing arm 804, its lower extreme rises after swing arm 804 is rotatory, thereby can realize dodging hanging beam dolly 7, can accelerate the construction progress, at the rotatory in-process of swing arm 804, the telescopic link upward movement that has already relieved the restraint with the support element has also been driven, as more preferred scheme, still can set up hoisting suspension devices such as hoist engine 807 on the third connecting seat 8, can be used to hang the telescopic link after will separating with first articulated seat 801 and get, thereby reduce the harm to the telescopic link and avoid the telescopic link to produce the hindrance to the work progress.

In this embodiment, since the other end of the telescopic rod is hinged to the swing arm 804, during the movement of the telescopic rod, the swing arm 804 may bear a larger pulling force or pushing force, for example, during the ascending process of the guide beam 1, the telescopic rod is shortened, and then the swing arm 804 may bear a larger pulling force, so that in a more preferable scheme, the guide beam 1 may be provided with the limit block 806 to resist the external force from the telescopic rod.

In this embodiment, the rotation shaft 803 can be driven to rotate by a fourth driving mechanism, as an implementation manner, the fourth driving mechanism can also be a telescopic mechanism, a stress block 805 is disposed on the rotation shaft 803 corresponding to a telescopic end of the telescopic mechanism, and the rotation shaft 803 can be driven to rotate by connecting the telescopic end of the telescopic mechanism with the stress block 805.

Under the above-mentioned driving of the third driving mechanism, the first connecting seat 101 can move along the length direction of the first rotating shaft 301, that is, the guide beam 1 is driven to move along the length direction of the first rotating shaft 301, so that the position of the guide beam 1 can be properly adjusted when the curved frame is erected. The center line of the guide beam 1 can be adjusted, and therefore accurate beam falling on the curve line is completed.

The second hinge base 802 in this embodiment can move laterally relative to the rotation shaft 803 under the driving of the fifth driving mechanism, so as to achieve the same effect. The third driving mechanism can be referred to for the setting of the fifth driving mechanism, which is not described herein.

It should be noted that, in the transportation, the telescopic link is possible to take place the dislocation for swing arm 804 and second supporting part 304, can cause the harm to the telescopic link to a certain extent, consequently, in the transportation, can remove the restraint between telescopic link and the first articulated seat 801 earlier, and set up connecting rod 808 between third connecting seat 8 and telescopic link, thereby support the telescopic link temporarily, treat after the transportation, remove the restraint of connecting rod 808 to the telescopic link again, and with the telescopic link with articulate between the seat 801 again can.

Both ends of first pivot 301 and second pivot 302 all are equipped with second extension section 306, second extension section 306 all seted up with first pivot 301 and second pivot 302 vertically pivot hole, this pivot is downthehole all to rotate and is connected with third pivot 305, wherein one end and the corresponding first supporting part 303 of third pivot 305 are connected, second stop gear 502 is the second round pin axle, offer on corresponding second extension section 306 and the third pivot 305 and be used for the second round pin axle male pinhole, second actuating mechanism 501 is the driving motor who sets up on second extension section 306, driving motor is used for driving the pivot hole internal rotation of third pivot 305 in second extension section 306, second actuating mechanism 501 still can set up the worm on second extension section 306, be used for driving the pivot hole internal rotation of the worm wheel on third pivot 305 in second extension section 306.

The swing and constraint structure of the supporting unit is disclosed in more detail in the scheme, the swing of the first supporting part 303 can be easily realized through the cooperation of the second extension section 306, the third rotating shaft 305 and the driving motor, and the constraint on the swing of the supporting unit can be realized under the action of the second pin shaft.

The first pin shaft, the second pin shaft and the pluggable pin shaft are all electric pin shafts.

In this scheme, first round pin axle, second round pin axle and pluggable round pin axle are electronic round pin axle then can realize its and correspond the plug between the pinhole to be convenient for the construction, for example near the pinhole position set up electronic round pin axle mechanism, the usable conventional rack and pinion transmission principle of this mechanism, under the drive of motor promptly, it is rotatory to drive the gear, and then drives rather than the rack of complex and is the round pin axle motion, thereby realizes the plug of round pin axle.

The method of use of the apparatus provided in this application is as follows:

firstly, preparation before construction is carried out, steel rails and rail sections at two ends of a beam piece to be replaced are cut, and a certain limit may be occupied after equipment installation is completed, so that an upright column of a contact net in a beam span area to be replaced needs to be rotated by 90 degrees, and the contact net needs to be pulled out.

A beam changing method with a foldable beam changing machine, comprising the following steps:

referring to fig. 1, in the first step, a guide beam 1 is supported by a pair of movable trolleys 2 and moved to a hole site to be replaced, two ends of the guide beam 1 are respectively hinged with a support arm, the other ends of the two support arms are hinged with the adjacent movable trolleys 2, a first special beam transporting column 601 moves to an existing bridge on one side of the guide beam 1, and a second special beam transporting column 602 transports a new beam to the existing bridge on the other side of the guide beam 1;

the two moving trolleys 2 are respectively connected with the first special beam transportation column 601 and the second special beam transportation column 602, and the first special beam transportation column 601 and the second special beam transportation column 602 provide power to complete the movement of the guide beam 1.

The first girder transport column 601 described here moves to one side of the guide beam 1, and the second girder transport column 602 moves to the other side of the guide beam 1, which means a state after transportation, that is, a position of final landing, and does not mean a sequence of movement of the first girder transport column 601, the moving cart 2, and the second girder transport column 602. Preferably, the second special beam carrying line 602, the movable trolley 2 and the first special beam carrying line 601 are sequentially arranged in the direction towards the construction site to synchronously enter the site, so that the positioning efficiency is increased.

In order to enhance the supporting effect of the movable trolley 2 on the supporting arms and optimize the span stress of the trolley body and the lower beam, a supporting mechanism can be arranged at the bottom end of the movable trolley 2, the supporting mechanism can be a hydraulic device, a cushion block can be arranged on the existing bridge or corresponding to the hydraulic mechanism, and after the movable trolley 2 is in place, the hydraulic device at the bottom end of the movable trolley extends and abuts against the cushion block, so that the pressure on wheels of the trolley is reduced, and the supporting strength of the movable trolley 2 is effectively improved.

Referring to fig. 2, in the second step, a first driving mechanism 401 connected with the supporting arm is controlled to start working, the first driving mechanism 401 drives the supporting arm to swing relative to the guide beam 1 and the movable trolley 2, the upper end of the supporting arm jacks the guide beam above a hole site to be replaced, the lower end of the supporting arm is supported on the movable trolley on an existing bridge at two sides of the hole site to be replaced, and then the first limiting mechanism 402 limits the relative swing among the guide beam 1, the supporting arm and the trolley;

it should be noted that, before the guide beam 1 enters, the supporting unit is in a contracted state, that is, the horizontal distance between the second supporting portion 304 and the guide beam 1 is the smallest, and at this time, when viewed along the length direction of the guide beam, the plane where the first supporting portion 303 and the second supporting portion 304 are located is inclined relative to the plane where the guide beam 1 is located, so that the top width of the whole structure can be effectively reduced, and when the guide beam 1 needs to be lifted, the supporting unit should be aligned, so that the plane where the first supporting portion 303 and the second supporting portion 304 are located is perpendicular to the ground.

After the guide beam 1, the support arm and the trolley are limited, that is, after the guide beam 1 rises, the pluggable pin shafts are pulled out from the corresponding pin holes, that is, the constraint between the telescopic rod and the guide beam 1 or the movable trolley 2 is removed, the second driving mechanism 501 connected with the support unit is controlled, that is, the driving motor starts to work, the driving motor drives the third rotating shaft 305 to rotate, so that the first support part 303 is driven to swing relative to the guide beam 1 and the movable trolley 2, the distance between the second support part 304 and the guide beam 1 and the movable trolley 2 is increased, when the maximum state of the notch width is reached, the swinging of the first support part 303 is limited by the second limiting mechanism 502, that is, the second pin shafts are inserted into the pin holes of the third rotating shaft 305 and the second extension section 306. At this point the equipment is ready.

It should be noted that, in order to ensure the stability of the whole structure when the supporting units are opened, the supporting units on the two moving trolleys 2 should be opened respectively, that is, the supporting unit on one of the moving trolleys 2 is opened first, and after the supporting unit is limited, the supporting unit on the other moving trolley 2 is opened and limited.

Referring to fig. 3, in the third step, the two hanging beam trolleys 7 on the guide beam 1 are matched with the two girder carrying trolleys on the first girder transporting special column 601 to hoist the old girder to the first girder transporting special column 601;

the two girder-carrying trolleys 7 on the first girder-carrying train 601 move to positions close to the guide beam 1, the girder-carrying trolleys 7 close to the first girder-carrying train 601 lower the end of the girder to support the girder to the girder-carrying trolleys far away from the guide beam 1, the girder-carrying trolleys move synchronously with the girder-carrying trolleys 7 far away from the first girder-carrying train 601 until the girder-carrying trolleys 7 far away from the first girder-carrying train 601 move to positions close to the end of the guide beam 1, and lower the girder to support the other end of the girder to the girder-carrying trolleys close to the guide beam 1, and the two girder-carrying trolleys drive the girder to move to a designated position on the first girder-carrying train 601, and then the first girder-carrying train 601 drives the girder to move to a girder piece placing area.

Referring to fig. 4, in the fourth step, the new beam is hoisted to the hole site to be replaced by using the two hanging beam trolleys 7 on the guide beam 1 and the two beam carrying trolleys on the second beam carrying train 602.

The new beam for replacement is placed on two beam carrying trolleys on the second special beam transport column 602, the two beam carrying trolleys are supported at two ends of a beam piece, the two hanging beam trolleys 7 move to one end, close to the second special beam transport column 602, of the guide beam 1, one end, close to the guide beam 1, of the beam piece is hung up through the hanging beam trolley 7 far away from the second special beam transport column 602 and moves towards the first special beam transport column 601 synchronously with the beam carrying trolleys far away from the guide beam 1 until the second beam carrying trolleys move to a position close to the end of the guide beam 1, the hanging beam trolley 7 close to the second special beam transport column 602 lifts the beam piece, the two hanging beam trolleys 7 move at the lower end of the guide beam 1, and the lifted beam piece is erected at a hole site to be replaced.

And step five, the movable trolley 2 drives the guide beam 1 to move to the position above the next frame replacing hole site, the first special beam transporting column 601 transports the removed old beam to a specified position and then returns to one side of the guide beam 1, the second special beam transporting column 602 transports a new beam to be replaced to the other side of the guide beam 1, the old beam is removed and the new beam is installed again, and the step five is repeated for many times according to actual conditions.

Referring to fig. 5, it should be noted that, in step five, in order to avoid the occurrence of the situation that the guide beam 1 exceeds the height limit of the bridge, before the mobile trolley 2 drives the guide beam 1 to move to the position above the next rack-changing hole site, the limit of the first limiting mechanism 402 on the guide beam 1, the supporting arm and the trolley is released, the first driving mechanism 401 connected with the supporting arm is controlled to start working, the first driving mechanism 401 drives the supporting arm to swing relative to the guide beam 1 and the mobile trolley 2, so that the upper end of the supporting arm drives the guide beam 1 to be lowered to the top end of the mobile trolley 2, that is, the lowering of the guide beam 1 is completed, and the problem of exceeding the height limit is avoided.

In the above steps, if there is a problem of exceeding the width limit, before the guide beam 1 descends, the second driving mechanism 501, i.e. the driving motor, connected to the second supporting portion 304 is controlled to start to operate, the second driving mechanism 501 drives the first supporting portion 303 to swing relative to the guide beam 1 and the trolley 2 so as to reduce the distance between the second supporting portion 304 and the guide beam 1 and the trolley 2, and at this time, the pluggable pin shaft is inserted into the corresponding pin hole, i.e. the telescopic rod is constrained with the guide beam 1 or the trolley 2, thereby facilitating the adjustment of the angle between the support arm and the guide beam 1 or the trolley 2 by the telescopic rod.

And after the construction is finished, the supporting units are contracted, the height of the guide beam 1 is reduced, and the equipment is withdrawn in sequence.

And finally, welding the cut steel rail, filling the railway ballast, tamping the railway ballast by using a tamping car, recovering a contact net, and finishing the replacement work of the bridge.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a folded cascade trades roof beam machine, its characterized in that includes nose girder, a drive mechanism and a stop gear, the nose girder lower extreme is provided with a pair of hanging beam dolly that is used for hanging put and remove the roof beam piece, the both ends of nose girder articulate respectively has the landing leg, every the landing leg all includes the travelling car that sets up in the nose girder below and the support arm articulated with nose girder and travelling car respectively, be equipped with the lintel hole that is used for the roof beam piece to pass on the support arm, a drive mechanism is used for driving the support arm is for nose girder and travelling car swing in order to realize the lift of nose girder, a stop gear is used for spacing the swing of support arm.

2. The foldable beam changing machine as claimed in claim 1, wherein the support legs and the guide beam form a first rotation axis, the support legs and the movable trolley form a second rotation axis, and the first rotation axis and the second rotation axis are horizontal and perpendicular to the length direction of the guide beam.

3. The foldable beam changing machine as claimed in claim 2, wherein each of the support arms comprises a first rotating shaft, a second rotating shaft and a pair of support units, the first rotating shaft is rotatably disposed on the guide beam, the second rotating shaft is rotatably disposed on the moving trolley, the first rotating shaft and the second rotating shaft are connected through the pair of support units, the lintel hole is formed between the pair of support units, and the first rotating shaft and the second rotating shaft are horizontally disposed and perpendicular to a length direction of the guide beam.

4. A foldable beam exchanger as claimed in claim 3, wherein the guide beam has first connecting seats corresponding to two of the first rotating shafts, the moving trolley has second connecting seats corresponding to two of the second rotating shafts, the first connecting seats and the second connecting seats have rotating shaft holes, and the first rotating shafts and the second rotating shafts are rotatably connected in the corresponding rotating shaft holes.

5. The foldable beam changing machine as claimed in claim 4, wherein the first connecting seat is connected to a third driving mechanism, and the first connecting seat is moved along the length direction of the first rotating shaft by the third driving mechanism.

6. The foldable beam changing machine as claimed in claim 4, wherein the first limiting mechanism is a first pin, the corresponding first connecting seat and the first rotating shaft are provided with a pin hole for inserting the first pin, the first driving mechanism is a telescopic rod, one end of the telescopic rod is hinged to the supporting unit, and the other end of the telescopic rod is hinged to a third connecting seat arranged on the guide beam or the moving trolley.

7. A foldable beam exchanger as claimed in claim 6, wherein said first connecting seat is disposed at an upper end of said guiding beam, and first extension sections are disposed at two ends of said guiding beam.

8. The foldable beam changing machine as claimed in claim 6, wherein each support unit comprises a pair of first support portions and a second support portion, the pair of first support portions are respectively disposed on the end portions of the same sides of the first rotating shaft and the second rotating shaft and are respectively hinged to the corresponding first rotating shaft and the corresponding second rotating shaft, one ends of the two first support portions, which are far away from the guide beam, are connected through the second support portion, the support unit is connected with a second driving mechanism and a second limiting mechanism, the second driving mechanism is used for driving the first support portions to swing relative to the guide beam and the movable trolley so as to adjust the distance of the second support portions relative to the guide beam and the movable trolley, and the second limiting mechanism is used for limiting the swing of the first support portions.

9. The foldable beam exchanger as claimed in claim 8, wherein the third connecting seat is disposed on the moving trolley, one end of the telescopic rod is hinged to the second supporting portion, the other end of the telescopic rod is hinged to the third connecting seat, a rotating shaft hole is formed at a connection position of the third connecting seat and the telescopic rod, and the third connecting seat and the telescopic rod are hinged to each other through a pluggable pin disposed in the rotating shaft hole.

10. The foldable beam changing machine as claimed in claim 8, wherein the third connecting seat is disposed on the guide beam, one end of the telescopic rod is hinged to the first hinge seat disposed on the second supporting portion, the first hinge seat and the telescopic rod are both provided with a pivot hole, and the first hinge seat and the telescopic rod are hinged to each other through a pluggable pin disposed in the pivot hole.

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