A mechanized erection mechanism and erection method for a bottom-supported bridge

Abstract

The present invention relates to a mechanized erection mechanism and erection method of a bottom-supported bridge, and belongs to the technical field of bridge erection devices. The erection mechanism includes an erection portal, a guide beam sleeve, a turning frame, a mobile frame and a push cylinder; the lower beam group of the erection portal is hinged to one end of the mobile frame; the upper beam group of the erection portal is hinged to one end of the guide beam sleeve; one end of the turning frame is hinged to the other end of the guide beam sleeve; the other end of the turning frame is hinged to the beam II of the mobile frame, and the connecting lines of the erection portal, the guide beam sleeve, the turning frame and the connecting points between the mobile frame can form a parallelogram; the end of the mobile frame connected to the erection portal is the front end, and the end of the mobile frame connected to the turning frame is the rear end; the cylinder end of the pushing cylinder is hinged to the middle position of the beam II at the rear end of the mobile frame, and the telescopic end of the pushing cylinder is hinged to the turning frame. The erection mechanism has a high degree of mechanization, and the erection time is short and the efficiency is high when the erection mechanism is used to erect a bridge.

Description

Technical Field

[0001] The invention relates to a mechanized erection mechanism and an erection method for a bottom-supported bridge, belonging to the technical field of bridge erection devices. Background Art

[0002] In bridge engineering, it is usually necessary to realize mechanized erection of bridges. There are two main existing mechanized bridge erection methods: one is to use a counterweight on the erection vehicle, which does not require a high erection site, but the bridge span is short; the other is to use a self-balancing bridge erection, which has a longer span, but the length of the erection site is difficult to meet. For large-span top-supported bridges, the self-balancing bridge erection method is often used. The center of gravity of the vehicles transporting the bridge is high, and there is a risk of the bridge tilting; the slope of the bridge gangplank is large, and the driver's line of sight of the vehicle transporting the bridge has no reference when going up the bridge, and the vehicle's passability is not strong.

[0003] Existing bottom-supported bridges are mostly assembled with general mechanical operations and manual assistance. Although this can solve the problem of vehicle passability, it takes a long time to erect and has low efficiency. Therefore, it is urgent to design a mechanized erection mechanism for bottom-supported bridges with short erection time, high efficiency, high degree of mechanization, strong adaptability to erection sites, and strong stability. Summary of the invention

[0004] In view of this, in order to solve the problem of long erection time and low efficiency of bottom-supported bridges, the purpose of the present invention is to provide a mechanized erection mechanism and erection method for bottom-supported bridges. The erection mechanism has a high degree of mechanization, and the erection of bottom-supported bridges using the erection mechanism has the advantages of short erection time and high efficiency.

[0005] To achieve the purpose of the present invention, the following technical solutions are provided.

[0006] A mechanized erection mechanism for a bottom-supported bridge, comprising an erection portal, a guide beam sleeve frame, a turnover frame, a moving frame and a jacking cylinder;

[0007] The lower crossbeam group of the erection gantry is hinged to one end of the mobile frame;

[0008] The upper crossbeam assembly of the door frame is hinged to one end of the guide beam sleeve frame;

[0009] One end of the turning frame is hinged to the other end of the guide beam sleeve frame;

[0010] The other end of the turning frame is hinged to the crossbeam II of the moving frame, and the connecting lines between the erection portal frame, the guide beam sleeve frame, the turning frame and the moving frame can form a parallelogram; the guide beam sleeve frame is used to push the guide beam, and the moving frame is used to move the erection portal frame, the guide beam sleeve frame and the turning frame to the bridge erection site;

[0011] The end of the movable frame connected to the erection gantry is the front end, and the end of the movable frame connected to the flip frame is the rear end;

[0012] The cylinder body end of the push oil cylinder is hinged to the middle position of the crossbeam II at the rear end of the moving frame, and the telescopic end of the push oil cylinder is hinged to the turning frame.

[0013] Further, the erection gantry comprises an upper beam group, a lower beam group, a column, a column support leg and a support leg cylinder;

[0014] Among them, the upper beam group and the lower beam group are horizontally arranged between two columns; the upper beam group is arranged on the top of the erection gantry, and the lower beam group is arranged in parallel below the upper beam group; the upper beam group includes two telescopic upper beams, the fixed ends of the two telescopic upper beams are butt-jointed, and the telescopic ends can be extended outward respectively; the lower beam group includes two telescopic lower beams, the fixed ends of the two telescopic lower beams are butt-jointed, and the telescopic ends can be extended outward respectively;

[0015] The bottom end of the column is connected with the cylinder body end of the outrigger oil cylinder, and the telescopic end of the outrigger oil cylinder is connected with the column outrigger.

[0016] Further, the erection gantry also includes an expansion cylinder;

[0017] Each telescopic upper crossbeam includes: an expansion cylinder, an upper inner crossbeam, an upper outer crossbeam and an upper middle crossbeam; the two upper outer crossbeams are fixed and symmetrically arranged at the center of the upper crossbeam group, the upper middle crossbeam is embedded in the upper outer crossbeam, the upper inner crossbeam is embedded in the upper middle crossbeam, the upper inner crossbeam extends out of one end of the upper middle crossbeam and is vertically connected to the top of the column; the expansion cylinders are respectively embedded in and penetrate the interior of the upper inner crossbeam, the upper outer crossbeam and the upper middle crossbeam to drive the extension and retraction of the upper inner crossbeam and the upper middle crossbeam in the upper crossbeam group;

[0018] Each telescopic lower cross beam comprises a lower inner cross beam, a lower outer cross beam and a lower middle cross beam; the two lower outer cross beams are fixed and symmetrically arranged at the center of the lower cross beam group, the lower middle cross beam is embedded in the lower outer cross beam, the lower inner cross beam is embedded in the lower middle cross beam, and the lower inner cross beam extends out of one end of the lower middle cross beam and is vertically connected to the column.

[0019] Furthermore, the guide beam sleeve frame includes a guide roller, a guide beam frame, a cross beam I, a hydraulic winch, a guide beam pushing device and a latch cylinder;

[0020] Among them, the number of guide beam frames is two groups, each group of guide beam frames includes an upper chord, a lower chord, a vertical rod and an oblique rod, and the lower chords in the two groups of guide beam frames are connected by more than two cross beams I; in each group of guide beam frames, the ends of the upper chord and the lower chord on the same side are connected by a vertical rod, and a plurality of oblique rods connected end to end in sequence are arranged between the two vertical rods, and the two ends of the oblique rods are respectively connected to the upper chord and the lower chord; guide rollers are arranged at the rear end of each upper chord and the front end of each lower chord; a hydraulic winch is arranged across the two upper chords; a guide beam pushing device is arranged between the ends of the two lower chords; a latch cylinder is arranged below the end of each lower chord, and the piston shaft of the latch cylinder is hinged to the single ear of the turning frame column in the turning frame.

[0021] Furthermore, the turning frame comprises turning frame columns, supporting beams and pushing cylinder supporting beams, and the number of turning frame columns is two groups;

[0022] Among them, the two groups of turning frame columns are connected by a supporting beam and a pushing cylinder supporting beam, and the supporting beam is arranged in parallel above the pushing cylinder supporting beam; a single ear is provided at one end of the two turning frame columns, and the single ear is hinged to the piston shaft of the corresponding latch cylinder on the guide beam sleeve; the pushing cylinder supporting beam is connected to one end of the pushing cylinder through a hinge device.

[0023] Further, the mobile frame includes a horizontal beam, a cross beam II, a driven sprocket, a top pulley, a bottom pulley, a side pulley and a limit cylinder;

[0024] Among them, the two horizontal beams are connected by a cross beam II, and a top pulley is arranged at the top of the rear end of each horizontal beam; a bottom pulley is arranged at the bottom of the rear end of each horizontal beam; a side pulley is arranged on the outer side of the rear end of each horizontal beam; two driven sprockets are arranged in the horizontal direction at the bottom of the horizontal beam, and a driving sprocket is arranged on the track of the erection vehicle, and the chain is meshed with the two driven sprockets and the driving sprocket on the track to realize chain transmission; the cylinder ends of the two limit cylinders are respectively fixed to the inner sides of the two horizontal beams, and the two limit cylinders are limited from both sides of the horizontal beam.

[0025] A method for erecting a through-type bridge, using the erection mechanism of the present invention for erection, is specifically as follows:

[0026] Step 1: The mobile frame slides out of the erection vehicle track to a specified distance through chain drive, and two limit cylinders are respectively limited from both sides of the horizontal beam;

[0027] Step 2: The push cylinder pushes the tilting frame to rotate, thereby driving the erection gantry to rotate to a vertical position and lifting the guide beam sleeve frame;

[0028] Step 3: The leg cylinder drives the column leg to extend toward the ground until it is in full contact with the ground, and the expansion cylinder drives the telescopic end of the erection gantry to extend to the set position;

[0029] Step 4: The guide beam is moved to the designated position through the guide beam sleeve frame; before erection, the retracted end of the latch cylinder is withdrawn to separate the guide beam sleeve frame from the turning frame; the push cylinder drives the turning frame to withdraw; then the bridge erection is completed through the guide beam and the erection gantry;

[0030] Step 5: After the erection is completed, the top push cylinder pushes the turning frame to rotate and lift until the turning frame can be hinged with one end of the guide beam sleeve frame;

[0031] Step 6: The expansion cylinder drives the telescopic end of the erection gantry to retract, and the leg cylinder drives the column leg to retract, until the column leg and the telescopic end are both retracted to the minimum position;

[0032] Step 7: The push cylinder drives the tilting frame, guide beam frame and erection gantry to be withdrawn.

[0033] Beneficial Effects

[0034] (1) The present invention provides a mechanized erection mechanism for a bottom-supported bridge, wherein the erection portal, the turning frame, the guide beam sleeve and the mobile frame in the erection mechanism are mechanically connected. Therefore, under the action of the jacking cylinder, the erection portal, the turning frame and the guide beam sleeve can realize mechanized movement, and the mobile frame can also realize mechanized movement under the action of the driving sprocket and the chain, thereby realizing the mechanized erection of the bottom-supported bridge, which can effectively shorten the erection time, improve the erection efficiency, reduce the labor cost, and improve the safety and reliability of the bottom-supported bridge erection process. Secondly, the connecting line between the erection portal, the turning frame, the guide beam sleeve and the mobile frame is in the shape of a parallelogram, so that the guide beam sleeve can not only be lifted from the mobile frame, but also be retracted into the mobile frame, realizing the dynamic adjustment of the height of the erection mechanism during the erection and transportation process, and solving the problem of poor passability of the transportation vehicle in the height direction. Thirdly, the present invention uses the jacking cylinder to realize the transition between the erection state and the transportation state of the erection mechanism, which can meet the relevant requirements of the height of road and railway transportation.

[0035] (2) The present invention provides a mechanized erection mechanism for a bottom-supported bridge. The expansion cylinder in the erection portal can realize the free extension and retraction of the beams in the upper beam group and the lower beam group, thereby meeting the relevant requirements for the width of road and rail transportation. By realizing the dynamic adjustment of the height and width during the erection and transportation process, the problem of poor passability of the transport vehicle in the height and width directions is effectively solved, and the relevant requirements for the height and width of road and rail transportation can be met, and the erection site has strong adaptability. The leg cylinder can make the column legs contact the ground stably, thereby improving the stability of the erection mechanism.

[0036] (3) The present invention provides a mechanized erection mechanism for a bottom-supported bridge, wherein a guide beam sleeve is used for pushing and retracting the guide beam, a hydraulic winch is arranged across two upper chords, and is used in conjunction with a bridge span pulley to achieve pushing of the bridge span; a guide beam pushing device is arranged between the ends of the two lower chords, and is used for pushing the guide beam.

[0037] (4) The present invention provides a method for erecting a bottom-supported bridge. The erection mechanism is used to erect the bottom-supported bridge, which has the advantages of short erection time and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the erection mechanism.

[0039] Figure 2 This is a schematic diagram of the overall structure of the erection portal frame.

[0040] Figure 3 It is a front view of the overall structure of the guide beam sleeve.

[0041] Figure 4 It is a top view of the overall structure of the guide beam sleeve.

[0042] Figure 5 It is a schematic diagram of the overall structure of the turnover frame.

[0043] Figure 6 It is a front view of the overall structure of the mobile rack.

[0044] Figure 7 It is a top view of the overall mobile frame.

[0045] Figure 8 It is a schematic diagram of the erection process status of the erection mechanism.

[0046] Among them, 1- erection gantry, 2- guide beam frame, 3- flip frame, 4- mobile frame, 5- push cylinder, 6- driving sprocket, 7- chain, 11- upper inner beam, 12- upper outer beam, 13- upper middle beam, 14- lower inner beam, 15- lower outer beam, 16- lower middle beam, 17- column support leg, 18- support leg cylinder, 19- unfolding cylinder, 21- guide roller, 22- upper chord rod, 23-lower chord, 24-vertical rod, 25-diagonal rod, 26-crossbeam I, 27-hydraulic winch, 28-guide beam pushing device, 29-latch cylinder, 31-turning frame column, 32-supporting crossbeam, 33-pushing cylinder supporting crossbeam, 41-horizontal beam, 42-crossbeam II, 43-driven sprocket, 44-top pulley, 45-bottom pulley, 46-side pulley, 47-limit cylinder. DETAILED DESCRIPTION

[0047] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0048] Example 1

[0049] like Figure 1 As shown, a mechanized erection mechanism of a bottom-supported bridge comprises: an erection portal frame 1, a guide beam sleeve frame 2, a turnover frame 3, a moving frame 4 and a jacking cylinder 5;

[0050] The lower crossbeam group of the erection gantry 1 is hinged to one end of the mobile frame 4; in this embodiment, two single ears are provided at the center of the lower outer crossbeam 15 in the lower crossbeam group of the erection gantry 1, and the two single ears are respectively connected to two double ears corresponding to one end of the two horizontal beams 41 in the mobile frame 4;

[0051] The upper crossbeam group of the erection door frame 1 is hinged to one end of the guide beam sleeve frame 2; in this embodiment, two single ears are provided at the center of the upper middle crossbeam 13 in the upper crossbeam group of the erection door frame 1, and the two single ears are respectively connected to the corresponding two double ears on the crossbeam I 26 provided at one end of the guide beam sleeve frame 2;

[0052] One end of the turning frame 3 is hinged to the other end of the guide beam sleeve frame 2; in this embodiment, one end of the two turning frame columns 31 of the turning frame 3 is provided with a single ear, and the single ear is hinged to the piston shaft of the latch cylinder 29 corresponding to one end of the guide beam sleeve frame 2;

[0053] The other end of the flip frame 3 is hinged to the crossbeam II 42 of the mobile frame 4, and the lines connecting the connection points between the door frame 1, the guide beam sleeve frame 2, the flip frame 3 and the mobile frame 4 can form a parallelogram, so that the height adjustment of the erection mechanism can be achieved.

[0054] For the convenience of description, the end of the movable frame 4 connected to the erection door frame 1 is called the front end, and the end of the movable frame 4 connected to the turnover frame 3 is called the rear end.

[0055] The cylinder end of the push cylinder 5 is hinged to the middle position of the crossbeam II 42 at the rear end of the moving frame 4, and the telescopic end (i.e. the piston rod end) of the push cylinder 5 is hinged to the turning frame 3.

[0056] Under the action of the jacking oil cylinder 5, the erection gantry 1, the guide beam sleeve 2, and the flip frame 3 can realize the erection and retraction functions of the erection mechanism. Under the thrust of the jacking oil cylinder 5, the flip frame 3 can rotate clockwise around the hinge point between it and the moving frame 4, thereby driving the erection gantry 1 to rotate clockwise around the hinge point between it and the moving frame 4, thereby driving the guide beam sleeve 2 to be lifted upward, and in the process of lifting the guide beam sleeve 2, the guide beam sleeve 2 is always parallel to the moving frame 4. In addition, under the pulling force of the jacking oil cylinder 5, the flip frame 3 will also rotate counterclockwise around the hinge point between it and the moving frame 4 and be retracted, thereby driving the erection gantry 1 to rotate counterclockwise and be retracted, and driving the guide beam sleeve 2 to move downward. Similarly, in the process of retracting the guide beam sleeve 2, the guide beam sleeve 2 is also always parallel to the moving frame 4.

[0057] like Figure 2 As shown, the erection portal 1 is used to assist in the erection of a bridge, and includes an upper beam group, a lower beam group, columns, column legs 17, a leg cylinder 18, and an expansion cylinder 19. Among them, the upper beam group and the lower beam group are horizontally arranged between two columns; the upper beam group is arranged at the top of the erection portal 1, and the lower beam group is arranged in parallel below the upper beam group; the upper beam group includes two telescopic upper beams, the fixed ends of the two telescopic upper beams are butt-jointed, and the telescopic ends can be extended outwards respectively to adjust the width of the upper beam group. In this example, specifically, each telescopic upper beam includes: an expansion cylinder 19, an upper inner beam 11, an upper outer beam 12, and an upper middle beam 13.

[0058] Among them, the two upper outer crossbeams 12 are fixed and symmetrically arranged at the center of the upper crossbeam group, the upper middle crossbeam 13 is embedded in the upper outer crossbeam 12, the upper inner crossbeam 11 is embedded in the upper middle crossbeam 13, and the upper inner crossbeam 11 extends out of one end of the upper middle crossbeam 13 and is vertically connected to the top of the column; the expansion cylinder 19 is respectively embedded in and penetrates the interior of the upper inner crossbeam 11, the upper outer crossbeam 12 and the upper middle crossbeam 13 to drive the upper inner crossbeam 11 and the upper middle crossbeam 13 in the upper crossbeam group to extend and retract;

[0059] The bottom end of the column is connected to the cylinder end of the leg cylinder 18, and the telescopic end of the leg cylinder 18 is connected to the column leg 17. The leg cylinder 18 is used to control the extension and retraction of the column leg 17.

[0060] The lower crossbeam group includes two telescopic lower crossbeams, the fixed ends of the two telescopic lower crossbeams are butt-jointed, and the telescopic ends can be extended outwards respectively to adjust the width of the upper crossbeam group. Each telescopic lower crossbeam includes a lower inner crossbeam 14, a lower outer crossbeam 15 and a lower middle crossbeam 16; the two lower outer crossbeams 15 are fixed and symmetrically arranged at the center of the lower crossbeam group, the lower middle crossbeam 16 is embedded in the lower outer crossbeam 15, the lower inner crossbeam 14 is embedded in the lower middle crossbeam 16, and the lower inner crossbeam 14 extends out of one end of the lower middle crossbeam 16 and is vertically connected to the column; in this way, when the deployment cylinder 19 drives the upper inner crossbeam 11 and the upper middle crossbeam 13 in the upper crossbeam group to extend and retract, the lower inner crossbeam 14 and the lower middle crossbeam 16 will also extend and retract accordingly.

[0061] The erection gantry 1 can be extended and retracted in the horizontal and vertical directions under the action of the outrigger cylinders 18 and the deployment cylinders 19 to meet the relevant requirements of the width of road and rail transportation.

[0062] like Figure 3-4 As shown, the guide beam sleeve 2 is used for pushing and withdrawing the guide beam, and includes a guide roller 21, a guide beam frame, a cross beam 1 26, a hydraulic winch 27, a guide beam pushing device 28 and a latch cylinder 29.

[0063] There are two groups of guide beam frames, each of which includes an upper chord 22, a lower chord 23, a vertical bar 24 and an oblique bar 25. The lower chord 23 in the two groups of guide beam frames passes through more than two cross beams I 26 is connected; in each group of guide beam frames, the ends of the upper chord rod 22 and the lower chord rod 23 on the same side are connected by a vertical rod 24, and a plurality of diagonal rods 25 connected end to end in sequence are arranged between the two vertical rods 24, and the two ends of the diagonal rod 25 are respectively connected to the upper chord rod 22 and the lower chord rod 23; the rear end of each upper chord rod 22 and the front end of each lower chord rod 23 are provided with a guide roller 21; the hydraulic winch 27 is arranged across the two upper chord rods 22, and is used in conjunction with the bridge span pulley to realize the pushing of the bridge span; a guide beam pushing device 28 is arranged between the ends of the two lower chord rods 23, and the guide beam pushing device 28 is used to push the guide beam; a latch cylinder 29 is arranged below the end of each lower chord rod 23, and the piston shaft of the latch cylinder 29 is hinged to the single ear of the turning frame column 31 in the turning frame 3.

[0064] like Figure 5 As shown, the turning frame 3 includes turning frame columns 31, supporting beams 32 and pushing cylinder supporting beams 33, and the number of the turning frame columns 31 is two groups.

[0065] Among them, the two groups of turning frame columns 31 are connected by a supporting beam 32 and a pushing cylinder supporting beam 33. The supporting beam 32 is arranged in parallel above the pushing cylinder supporting beam 33, that is, the supporting beam 32 is close to the end where the turning frame 3 is connected to the guide beam sleeve 2, and the pushing cylinder supporting beam 33 is close to the end where the turning frame 3 is connected to the moving frame 4; a single ear is provided at one end of the two turning frame columns 31, and the single ear is hinged to the piston shaft of the corresponding latch cylinder 29 on the guide beam sleeve 2; the pushing cylinder supporting beam 33 is hinged to the telescopic end of the pushing cylinder 5.

[0066] like Figure 6-7 As shown, the mobile frame 4 includes a horizontal beam 41, a cross beam II 42, a driven sprocket 43, a top pulley 44, a bottom pulley 45, a side pulley 46 and a limiting cylinder 47.

[0067] Wherein, the number of horizontal beams 41 is two, and the number of cross beams II 42 is more than two;

[0068] The two horizontal beams 41 are connected by multiple cross beams II 42. A top pulley 44 is arranged at the top of the rear end of the horizontal beam 41. In this embodiment, two top pulleys 44 are arranged on each horizontal beam 41; a bottom pulley 45 is arranged at the bottom of the rear end of each horizontal beam 41; a side pulley 46 is arranged on the outer side of the rear end of each horizontal beam 41; two driven sprockets 43 are arranged in the horizontal direction at the bottom of the horizontal beam 41, and a driving sprocket 6 is arranged on the track of the erection vehicle. The chain 7 is meshed with the two driven sprockets 43 and the driving sprocket 6 on the track to realize chain transmission, thereby realizing the sliding of the mobile frame 4 from the track of the erection vehicle or retracting it. The specific position of the limit cylinder 47 in the horizontal beam 41 is set according to the extended position of the moving frame 4, and the cylinder ends of the two limit cylinders 47 are respectively fixed to the inner sides of the two horizontal beams 41, and the two limit cylinders 47 are respectively limited from both sides of the horizontal beam 41. When no limiting is performed, the telescopic end of the limit cylinder 47 is located inside the horizontal beam 41; when limiting is required, the telescopic end of the limit cylinder 47 is extended through the corresponding internal hole on the horizontal beam 41.

[0069] The workflow of bridge erection using the mechanized erection mechanism of the bottom-supported bridge is as follows: Figure 8 The specific installation method is as follows:

[0070] Step 1, the mobile frame 4 slides out from the track of the erection vehicle to a specified distance through chain transmission, and the two limit cylinders 47 are respectively limited from both sides of the horizontal beam 41; that is, the active sprocket 6 rotates, driving the driven sprocket 43 and the chain 7 to rotate, and then driving the top pulley 44, the bottom pulley 45 and the side pulley 46 to rotate, and through the chain transmission, the mobile frame 4 slides out from the track of the erection vehicle. When the mobile frame 4 slides to the specified distance, the limit cylinder 47 starts to work, and the telescopic end of the limit cylinder 47 extends through the internal hole reserved in the horizontal beam 41 and cooperates with the hole reserved in the track of the erection vehicle, that is, the telescopic end of the limit cylinder 47 extends into the hole reserved in the track of the erection vehicle to achieve the limitation of the mobile frame 4.

[0071] Step 2, the pushing cylinder 5 is extended, and the pushing cylinder 5 pushes the turning frame 3 to rotate, thereby driving the erection gantry 1 to rotate to a vertical position, and lifting the guide beam sleeve 2; that is, the pushing cylinder 5 pushes the turning frame 3 to rotate clockwise around the hinge point between it and the moving frame 4, thereby driving the erection gantry 1 to rotate clockwise around the hinge point between it and the moving frame 4, and lifting the guide beam sleeve 2. When the erection gantry 1 is in a vertical position, the pushing cylinder 5 stops working.

[0072] Step three, the leg cylinder 18 drives the column leg 17 to extend toward the ground until it is completely in contact with the ground, and the deployment cylinder 19 drives the telescopic end of the erection gantry 1 to extend to the set position, and the set position is the position where the telescopic end of the erection gantry 1 is extended when the width of the erection gantry 1 allows the bridge to be erected to pass; that is, the leg cylinder 18 of the erection gantry 1 drives the column leg 17 to extend toward the ground until the column leg 17 is completely in contact with the ground, at which time the leg cylinder 18 stops working; the deployment cylinder 19 of the erection gantry 1 drives the upper inner beam 11 and the upper middle beam 13 to extend, and in this process, the lower inner beam 14 and the lower middle beam 16 are also brought out; when the upper inner beam 11 and the lower inner beam 14 are extended to the set position, the deployment cylinder 19 stops working.

[0073] Step 4, the guide beam is moved to the specified position through the guide beam sleeve 2; before the bridge is erected, the contracted end of the latch cylinder 29 is withdrawn to separate the guide beam sleeve 2 from the turning frame 3; then the pushing cylinder 5 drives the turning frame 3 to withdraw, that is, the pushing cylinder 5 contracts, driving the turning frame 3 to withdraw, so as to facilitate the bridge to pass through the erection portal 1. When the pushing cylinder 5 contracts to the minimum position, the pushing cylinder 5 stops working; then the erection of the bridge is completed through the guide beam and the erection portal 1.

[0074] Step 5. After the bridge is erected, it enters the withdrawal preparation stage. The pushing cylinder 5 pushes the turning frame 3 to rotate and lift until the turning frame 3 can be hinged with one end of the guide beam sleeve 2; that is, the pushing cylinder 5 extends out and pushes the turning frame 3 to rotate clockwise around the hinge point with the moving frame 4. When the single ear at one end of the turning frame column 31 of the turning frame 3 can be hinged with the piston shaft of the corresponding latch cylinder 29 on the guide beam sleeve 2, the pushing cylinder 5 stops working.

[0075] Step six, the deployment cylinder 19 drives the telescopic end of the erection portal frame 1 to retract, and the leg cylinder 18 drives the column leg 17 to retract until the column leg 17 and the telescopic end are both retracted to the minimum position; that is, the deployment cylinder 19 of the erection portal frame 1 drives the upper inner beam 11 and the upper middle beam 13 to retract back, and in this process, the lower inner beam 14 and the lower middle beam 16 are also driven to retract; the leg cylinder 18 drives the column leg 17 to retract; when the column leg 17, the upper inner beam 11, the upper middle beam 13, the lower inner beam 14 and the lower middle beam 16 are all retracted to the minimum position, the leg cylinder 18 and the deployment cylinder 19 stop working.

[0076] Step seven, the pushing cylinder 5 drives the turning frame 3, the guide beam sleeve frame 2, and the erection door frame 1 to withdraw until the turning frame 3 is withdrawn into the moving frame 4; that is, the pushing cylinder 5 contracts, driving the turning frame 3, the guide beam sleeve frame 2, and the erection door frame 1 to withdraw, and when the turning frame 3 is withdrawn into the moving frame 4, the pushing cylinder 5 stops working and the withdrawal is completed.

[0077] The erection mechanism can be arranged on a wheeled chassis vehicle to facilitate the erection of the bridge and the sliding out of the mobile frame 4, but is not limited to this method.

[0078] The present invention includes but is not limited to the above embodiments. Any equivalent replacement or partial improvement made under the principle of the spirit of the present invention shall be deemed to be within the protection scope of the present invention.

Claims

1. A mechanized erection mechanism for a bottom-supported bridge, Features: include: Erect the door frame, guide beam frame, tilting frame, mobile frame and push cylinder; The lower crossbeam group of the erection gantry is hinged to one end of the mobile frame; The upper crossbeam assembly of the door frame is hinged to one end of the guide beam sleeve frame; One end of the turning frame is hinged to the other end of the guide beam sleeve frame; The other end of the turning frame is hinged to the crossbeam II of the moving frame, and the connecting lines between the erection portal frame, the guide beam sleeve frame, the turning frame and the moving frame can form a parallelogram; the guide beam sleeve frame is used to push the guide beam, and the moving frame is used to move the erection portal frame, the guide beam sleeve frame and the turning frame to the bridge erection site; The end of the movable frame connected to the erection gantry is the front end, and the end of the movable frame connected to the flip frame is the rear end; The cylinder end of the push cylinder is hinged to the middle position of the crossbeam II at the rear end of the moving frame, and the telescopic end of the push cylinder is hinged to the turning frame; The erection gantry comprises an upper beam group, a lower beam group, columns, column legs and leg cylinders; Among them, the upper beam group and the lower beam group are horizontally arranged between two columns; the upper beam group is arranged on the top of the erection gantry, and the lower beam group is arranged in parallel below the upper beam group; the upper beam group includes two telescopic upper beams, the fixed ends of the two telescopic upper beams are butt-jointed, and the telescopic ends can be extended outward respectively; the lower beam group includes two telescopic lower beams, the fixed ends of the two telescopic lower beams are butt-jointed, and the telescopic ends can be extended outward respectively; The bottom end of the column is connected to the cylinder end of the outrigger oil cylinder, and the telescopic end of the outrigger oil cylinder is connected to the column outrigger; The mobile frame includes a horizontal beam, a cross beam II, a driven sprocket, a top pulley, a bottom pulley, a side pulley and a limit cylinder; Among them, the two horizontal beams are connected by a cross beam II, and a top pulley is arranged at the top of the rear end of each horizontal beam; a bottom pulley is arranged at the bottom of the rear end of each horizontal beam; a side pulley is arranged on the outer side of the rear end of each horizontal beam; two driven sprockets are arranged in the horizontal direction at the bottom of the horizontal beam, and a driving sprocket is arranged on the track of the erection vehicle, and the chain is meshed with the two driven sprockets and the driving sprocket on the track to realize chain transmission; the cylinder ends of the two limit cylinders are respectively fixed to the inner sides of the two horizontal beams, and the two limit cylinders are limited from both sides of the horizontal beam.

2. A mechanized erection mechanism for a through bridge according to claim 1, Features: The erection gantry also includes an expansion cylinder; Each telescopic upper crossbeam includes: an expansion cylinder, an upper inner crossbeam, an upper outer crossbeam and an upper middle crossbeam; the two upper outer crossbeams are fixed and symmetrically arranged at the center of the upper crossbeam group, the upper middle crossbeam is embedded in the upper outer crossbeam, the upper inner crossbeam is embedded in the upper middle crossbeam, the upper inner crossbeam extends out of one end of the upper middle crossbeam and is vertically connected to the top of the column; the expansion cylinders are respectively embedded in and penetrate the interior of the upper inner crossbeam, the upper outer crossbeam and the upper middle crossbeam to drive the extension and retraction of the upper inner crossbeam and the upper middle crossbeam in the upper crossbeam group; Each telescopic lower cross beam comprises a lower inner cross beam, a lower outer cross beam and a lower middle cross beam; the two lower outer cross beams are fixed and symmetrically arranged at the center of the lower cross beam group, the lower middle cross beam is embedded in the lower outer cross beam, the lower inner cross beam is embedded in the lower middle cross beam, and the lower inner cross beam extends out of one end of the lower middle cross beam and is vertically connected to the column.

3. A mechanized erection mechanism for a through bridge according to claim 1 or 2, Features: The guide beam sleeve frame includes a guide roller, a guide beam frame, a cross beam I, a hydraulic winch, a guide beam pushing device and a latch cylinder; Among them, the number of guide beam frames is two groups, each group of guide beam frames includes an upper chord, a lower chord, a vertical rod and an oblique rod, and the lower chords in the two groups of guide beam frames are connected by more than two cross beams I; in each group of guide beam frames, the ends of the upper chord and the lower chord on the same side are connected by a vertical rod, and a plurality of oblique rods connected end to end in sequence are arranged between the two vertical rods, and the two ends of the oblique rods are respectively connected to the upper chord and the lower chord; guide rollers are arranged at the rear end of each upper chord and the front end of each lower chord; a hydraulic winch is arranged across the two upper chords; a guide beam pushing device is arranged between the ends of the two lower chords; a latch cylinder is arranged below the end of each lower chord, and the piston shaft of the latch cylinder is hinged to the single ear of the turning frame column in the turning frame.

4. A mechanized erection mechanism for a through bridge according to claim 1 or 2, Features: The turning frame comprises turning frame columns, supporting beams and push cylinder supporting beams, and the number of turning frame columns is two groups; Among them, the two groups of turning frame columns are connected by a supporting beam and a pushing cylinder supporting beam, and the supporting beam is arranged in parallel above the pushing cylinder supporting beam; a single ear is provided at one end of the two turning frame columns, and the single ear is hinged to the piston shaft of the corresponding latch cylinder on the guide beam sleeve; the pushing cylinder supporting beam is connected to one end of the pushing cylinder through a hinge device.

5. A method for erecting a through-type bridge, It is characterized in that The erection is performed using the erection mechanism described in claim 3, specifically as follows: Step 1: The mobile frame slides out of the erection vehicle track to a specified distance through chain drive, and two limit cylinders are respectively limited from both sides of the horizontal beam; Step 2: The push cylinder pushes the tilting frame to rotate, thereby driving the erection gantry to rotate to a vertical position and lifting the guide beam sleeve frame; Step 3: The leg cylinder drives the column leg to extend toward the ground until it is in full contact with the ground, and the expansion cylinder drives the telescopic end of the erection gantry to extend to the set position; Step 4: The guide beam is moved to the designated position through the guide beam sleeve frame; before erection, the retracted end of the latch cylinder is withdrawn to separate the guide beam sleeve frame from the turning frame; the push cylinder drives the turning frame to withdraw; then the bridge erection is completed through the guide beam and the erection gantry; Step 5: After the erection is completed, the top push cylinder pushes the turning frame to rotate and lift until the turning frame can be hinged with one end of the guide beam sleeve frame; Step 6: The expansion cylinder drives the telescopic end of the erection gantry to retract, and the leg cylinder drives the column leg to retract, until the column leg and the telescopic end are both retracted to the minimum position; Step 7: The push cylinder drives the tilting frame, guide beam sleeve frame and erection gantry to withdraw.

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