CN201972096U - Cross-tunnel lower guide beam type fixed-point hoisting bridge girder erection machine - Google Patents

Abstract

The utility model relates to a cross-tunnel lower guide beam type fixed-point hoisting bridge girder erection machine, belonging to railroad bridge erection equipment. The hoisting bridge girder erection machine is characterized in that a foldable front landing leg and an auxiliary landing leg are connected on the bottom surface of the front part of a girder, and an O-shaped rear landing leg is connected at the rear end of the girder; a front girder hoisting crane and a rear girder hoisting crane are arranged on the girder, a winch assembly is arranged in the middle of the girder, a guide beam hoisting machine and a guide beam hole-passing crane are connected on a track at the upper end surface of the girder, and the guide beam hole-passing crane is positioned at the front end of the girder; a lower girder guiding machine comprises a front girder landing leg and a rear girder landing leg, and a front guide beam landing leg and a rear guide beam landing leg are arranged at the front and rear ends of the girder of the lower girder guide beam. The cross-tunnel lower guide beam type fixed-point hoisting bridge girder erection machine has the advantages that the carrying tunnel-crossing state is the state that the guide beam is arranged in front, and the girder guiding machine can be in position directly during tunnel-exiting, thus greatly improving the efficiency of whole machine resetting and erection after tunnel-exiting, having good working condition adaptability, saving the construction time and the construction cost, and being steady, safe and reliable.

Description

Tunnel-type lower guide beam fixed-point lifting bridge erecting machine

technical field

The utility model relates to a railway bridge erecting device, in particular to a tunnel-passing lower guide beam type fixed-point lifting bridge erecting machine.

Background technique

The construction equipment for the erection of high-speed railway bridges is the bridge erecting machine, which is divided into the integrated machine for transporting the frame and the split type bridge erecting machine for the transport frame. It is a towed non-fixed point lifting bridge erecting machine and a lower guide beam type fixed point lifting bridge erecting machine. Although the all-in-one machine can pass through the tunnel, its efficiency is extremely low because the working conditions of beam transport and beam erection cannot be carried out at the same time, and it is not suitable for long-distance erection requirements. The drag-type non-fixed-point bridge erecting machine is dragged forward by the steel wire rope of the front crane during the beam feeding process. The supporting reaction force on the legs of the bridge erecting machine is large, and the process has a large impact and is unstable.

The lower guide beam type fixed-point lifting bridge erecting machine is more and more used in the high-speed railway construction in the central and eastern regions due to its advantages of high efficiency, safety, and reasonable force. There are following disadvantages:

1. The whole machine is super high and super wide, and must be disassembled to be transported through the tunnel by a beam transport vehicle;

2. It is impossible to realize short-distance beam erection before and after exiting the tunnel.

Utility model content

The purpose of this utility model is to provide a fixed-point hoisting and erecting machine of the lower guide beam type for passing through the tunnel, which solves the problem that the whole machine is super high and super wide, and must be disassembled to be carried through the tunnel by a beam transport vehicle; Problems with erecting beams at close range.

The purpose of this utility model is achieved in that the lifting bridge erecting machine includes a beam erecting machine and a lower guiding beam machine; the beam erecting machine includes a main beam, an O-shaped rear leg, a foldable front leg, an auxiliary leg, The front crane, the rear crane, hoist components, the guide beam crane, the guide beam passing crown, the lower guide beam main beam, the guide beam front outrigger and the guide beam rear outrigger, in front of the main beam Foldable front outriggers and auxiliary outriggers are connected to the bottom surface of the part, and O-shaped rear outriggers are connected to the rear end of the main number beam; the front suspension beam crane and the rear suspension beam crane are installed on the main beam, and the central part of the main beam is installed with The winch assembly, the guide beam crane and the guide beam passing crane are connected on the track on the upper end surface of the main beam, and the guide beam passing crane is located at the front end of the main beam; the lower guide beam machine includes the lower guide beam and the main beam guide The front outriggers of the beam and the rear outriggers of the guide beam are arranged at the front and rear ends of the main girder of the lower guide beam and the rear outriggers of the guide beam.

The main girder includes a box girder, a rear connecting girder, a middle connecting girder and a front connecting girder, and there are two box girders placed in parallel, which are longitudinal fish-belly type, and are connected between the two parallel box girders. The rear tie beam, the center tie beam and the front tie beam connect the two box girders through three tie beams. The rear tie beam is equipped with an O-shaped rear outrigger on the outside of the main beam, and the center tie beam is equipped with a sleeve cavity.

The O-shaped rear outrigger is composed of a lower beam, a turning beam, an L beam, a hinged device, a supporting cylinder, and a running mechanism. In the U-shaped structure, the openings of the two L beams at the upper end are connected to the main beam by bolts, and the rear connecting beams are connected between the main beams to form an O-shaped closed structure. The lower beams, turning beams, L beams, Both the main beam and the rear connecting beam are box-shaped structures; there are hinged devices between the L beam and the main beam and between the connection position of the O-shaped rear outrigger and the turning beam, which can be flipped and folded around it; the O-shaped The two ends of the bottom surface of the lower beam of the rear outrigger are respectively connected with a supporting oil cylinder and a running mechanism to realize the support of the whole machine and the running of the cart.

The foldable front outrigger includes an upper section, a middle section, a lower section of the front outrigger and a ball hinge load bearing seat, the upper section of the front outrigger is hinged to the main beam through a pin shaft, and the bottom of the middle section and the lower section have connecting balls Hinge, the middle section and the lower section are connected sequentially, hinged on one side of the middle section and the lower section, the middle section is provided with a box-shaped sleeve, and the ball hinge bearing seat is located at the bottom of the middle section or the lower section.

The auxiliary leg includes an adjustment inner sleeve, a forward running mechanism and a reverse running mechanism. The adjustment inner sleeve is inserted into the sleeve cavity of the middle link beam, fixed by a pin, and connected to the lower part of the adjustment inner sleeve. There are forward running mechanism and reverse running mechanism. Both forward running mechanism and reverse running mechanism are two sets, symmetrically installed, located on the upper end and two sides of the main girder of the lower guide beam.

The hoist assembly includes a connecting frame and a hoist, the connecting frame is connected to the inner side of the middle of the main girder, and there are four groups of hoists that are connected to the connecting frame, two groups of hoists work together, and the other two groups work independently. The lift is connected with the fixed pulley blocks of the front and rear cranes through wire ropes.

The structure of the front suspension beam crane and the rear suspension beam crane is the same, including the crane frame, fixed pulley assembly, movable pulley assembly and spreader. It is connected with the vertical hydraulic oil cylinder and the crown block frame, and the fixed pulley assembly is fixed on the crown block frame, and is connected with the movable pulley assembly on the serial spreader through a steel wire rope.

The guide beam crane includes a crane frame, a connecting rod, a side arm, a self-propelled mechanism, a lifting cylinder and an oil cylinder; On the main beam, there are four lifting cylinders connected to the upper end of the crane frame; the lower end of the crane frame is connected to one end of the side arm through a hinge device, and the other end of the side arm and the upper end of the crane frame pass through The hinged device is connected with a connecting rod, and an oil cylinder is connected to the side arm at the lower end of the connecting rod. The vertical rod, connecting rod and side arm of the crane frame form a stable triangular structure, and the arms on both sides are connected to the guide beam and the hanging fin through the oil cylinder.

The guide beam passing crown crane includes a hanging running mechanism, a fixed pulley block, a moving pulley block and a spreader. There are four hanging running mechanisms, and a group of four is located on the guide rail at the bottom of the main beam. There is a hoist on the mechanism, and each hoist is connected to the movable pulley block through the fixed pulley block through the steel wire rope.

The main girder of the lower guide beam is a rectangular box-shaped structural beam, on which auxiliary outriggers are provided with a forward running track, and the side of the upper part forms another small box-shaped structure, and the auxiliary outriggers are provided with a reverse running track, and the rear part is provided with a wing-shaped track. Hanging wings, the middle part is equipped with hoisting holes for hoisting hoisting tools of the guide beam crane.

The rear legs of the guide beam are connected to the main beam of the lower guide beam through bolts, and are hinged, so that the bolts can be removed and then folded forward to reduce the height of the guide beam machine at any time. The upper and lower sections are sleeve matching structures, which can be adjusted in height.

The front outrigger of the guide beam is connected with the main beam of the lower guide beam through a pin shaft, and can be folded backward to reduce the height of the guide beam machine when passing through the tunnel. The upper and lower sections are sleeve matching structures, which can be adjusted in height.

Beneficial effects, due to the adoption of the above scheme, the tunnel-type lower guide beam type fixed-point lifting bridge erecting machine described in the utility model is suitable for the normal erection of large-tonnage box girder bridges on high-speed railways, and can also be disassembled without zero disassembly. To achieve slimming, it is carried by a small tire beam truck through a double-track tunnel at a speed of 250km/h. It has good adaptability to working conditions, saves construction time, improves work efficiency, and saves construction costs. Its specific advantages and positive effects are: passing through the tunnel type The biggest feature of the guide beam fixed-point hoisting bridge erecting machine is the zero disassembly of the tunnel, that is, the O-shaped rear outrigger can be folded step by step, and the guide beam crane hangs down the side arm to reduce the width of the whole machine. Through the auxiliary outrigger The method of height reduction reduces the height of the whole machine, so that the beam transport vehicle can be carried through the tunnel; the fish-belly beam design of the lower guide beam fixed-point hoisting bridge erecting machine through the tunnel reduces the height of the main machine, and the two ends of the main beam can go deep into the tunnel. Erection, realize zero-distance erection of tunnel mouth; Reached the purpose of the present utility model.

Advantages: In addition to being suitable for the normal erection of large-tonnage box girder bridges on high-speed railways, the bridge-erecting machine can also be dismantled without dismantling. It can be folded to achieve slimming, and it can be carried by a small tire beam truck through a double-track tunnel at a speed of 250km/h. , good adaptability to working conditions, saving construction time, improving work efficiency, and saving construction costs. The tunnel-type lower guide beam type fixed-point lifting bridge erecting machine adopts fixed-point feeding beam and fixed-point lifting. The whole process is stable and impact-free, and each leg is affected The force is uniform, the support reaction force is small, safe and reliable; the tunnel-type lower guide beam type fixed-point hoisting bridge erecting machine guide beam passes through the guide beam crane, auxiliary outriggers, and guide beam cranes to carry and move, always in a simply supported state , stable and safe; the tunnel-type lower guide beam type fixed-point hoisting bridge-erecting machine is carried through the tunnel in the state of the guide beam front-mounted state, and the guide beam machine can be directly in place when exiting the tunnel, which greatly improves the reset of the whole machine after exiting the tunnel. erection efficiency.

Description of drawings

Fig. 1 is the structural diagram of the fixed-point hoisting bridge erecting machine of the tunnel-passing lower guide beam type described in the utility model.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a cross-sectional view of A-A in Fig. 1, that is, a cross-sectional view of the O-shaped rear outrigger of the bridge erecting machine.

Fig. 4 is the folded state when the O-shaped rear leg passes through the tunnel.

Fig. 5 is a sectional view of B-B in Fig. 1, that is, a sectional view of the foldable front outrigger of the bridge erecting machine.

Fig. 6 is a sectional view of C-C in Fig. 1, that is, a sectional view of the auxiliary leg of the bridge erecting machine.

Fig. 7 is a sectional view of D-D in Fig. 1, that is, a sectional view of the hoisting assembly of the bridge erecting machine.

Fig. 8 is a sectional view of E-E in Fig. 1, that is, a sectional view of the bridge erecting machine when the front and rear beams are hoisted and the crane is hoisted.

Fig. 9 is a sectional view of F-F in Fig. 1, that is, a broken section of the guide beam crane of the bridge erecting machine.

Fig. 10 is the drooping contraction state when the guide beam crane passes through the tunnel.

Fig. 11 is a G-G cross-sectional view in Fig. 1, that is, a cross-section of the guide beam crown block of the bridge erecting machine.

Figure 12 is the H-H section in Figure 1, that is, the machine-broken section of the guide beam of the bridge erecting machine.

Figure 13 is a schematic diagram of the lower crossbeam of the O-shaped rear outrigger before the bridge erecting machine passes through the tunnel.

In the figure: 1. Main beam; 2. O-shaped rear outrigger; 3. Foldable front outrigger; 4. Auxiliary outrigger; 5. Front suspension beam crane; 6. Rear suspension beam crane; 7. Winch Components; 8. Guide beam crane; 9. Guide beam passing crown; 10. Main girder of lower guide beam; 11. Front outrigger of guide beam; 12. Rear outrigger of guide beam; 13. Box beam; 14. Rear connecting beam; 15, middle connecting beam; 16, front connecting beam; 17, lower beam; 18, turning beam; 19, L beam; 20, hinged device; 21, supporting cylinder; 22, running mechanism; 23, front Leg upper section; 24, middle section; 25, lower section; 26, spherical hinge bearing seat; 27, adjusting inner sleeve; 28, forward running mechanism; 29, reverse running mechanism; 30, connecting frame; 31, volume 32. Crane frame; 33. Fixed pulley assembly; 34. Moving pulley assembly; 35. Spreader; 36. Crane frame; 37. Connecting rod; 38. Side arm; 39. Self-propelled mechanism; 40. Lifting Oil cylinder; 41, oil cylinder; 42, hanging running mechanism; 43, fixed pulley block; 44, moving pulley block; 45, spreader; 46, forward running track; 49, beam transport car; 50, beam trolley; 51, top Lift bracket.

Detailed ways

Embodiment 1: The lifting bridge erecting machine includes a beam erecting machine and a lower guiding beam machine; the beam erecting machine includes a main beam 1, an O-shaped rear outrigger 2, a foldable front outrigger 3, an auxiliary outrigger 4, and a front hanger Beam crane 5, rear crane beam crane 6, winch assembly 7, guide beam crane 8, guide beam passing crane 9, lower guide beam main beam 10 guide beam front outrigger 11 and guide beam rear outrigger 12 A foldable front outrigger 3 and an auxiliary outrigger 4 are connected to the bottom surface of the front part of the main beam 1, and an O-shaped rear outrigger 2 is connected to the rear end of the main beam; Hanging beam crane 6, winch assembly 7 is installed in the middle of the main beam, guide beam crane 8 and guide beam passing crane 9 are connected on the track on the upper end surface of main beam 1, guide beam passing crane 9 is located on the main beam 1 front end; the lower guide beam machine includes the lower guide beam main beam 10 guide beam front legs 11 and the guide beam rear legs 12, and the front and rear ends of the lower guide beam main beam 10 are provided with the guide beam front legs 11 And guide beam rear outrigger 12.

Described main girder comprises box girder 13, rear connection beam 14, middle connection beam 15 and front connection beam 16, and box girder 13 has two, and is placed in parallel, and is vertical fish-belly type, between two parallel box girders 13 is connected with the rear connecting beam 14, the middle connecting beam 15 and the front connecting beam 16, and the two box beams are connected by three connecting beams, and the outer side of the main beam at the rear connecting beam 14 is provided with an O-shaped rear outrigger. position, a sleeve cavity is set inside the middle link beam 15 .

The O-shaped rear outrigger is made up of lower crossbeam 17, turning beam 18, L beam 19, hinged device 20, supporting oil cylinder 21 and traveling mechanism 22, and the lower crossbeam is one, respectively connected with turning beam and L beams form a positive U-shaped structure, and the openings of the two L beams at the upper end are connected to the main beam by bolts, and the rear connecting beams 14 are connected between the main beams to form an O-shaped closed structure. The lower beam 17 , turning beam 18, L beam 19, main beam and rear connecting beam 14 are all box-shaped structures; between the L beam 19 and the main beam and between the O-shaped rear outrigger connection position and the turning beam 18, hinged devices are arranged 20, all can be flipped and folded around it; the two ends of the bottom surface of the lower beam of the O-shaped rear outrigger are respectively connected with a support cylinder 21 and a running mechanism 22, so as to realize the support of the whole machine and the running of the cart.

The foldable front leg includes an upper section 23, a middle section 24, a lower section 25 and a spherical hinge bearing seat 26. The upper section 23 of the front leg is hinged with the main beam 1 through a pin shaft. It can be folded towards the back of the main girder, close to the main girder, and its upper part is equipped with a self-propelled hanging mechanism, which is driven by a motor; the bottom of the middle section 24 and the lower section 25 have connecting ball joints, and the middle section 24 and the lower section 25 are connected sequentially , hinged on one side of the middle section 24 and the lower section 25, the middle section is provided with a box-shaped sleeve, which can adjust the height, and the ball hinge bearing seat 26 is located at the bottom of the middle section 24 or the lower section 25.

The auxiliary leg includes an adjustment inner sleeve 27, a forward running mechanism 28 and a reverse running mechanism 29. The adjustment inner sleeve 27 is inserted into the sleeve cavity of the middle connecting beam 15, and fixed by a pin shaft. The bottom of tube is connected with forward running mechanism 28 and reverse running mechanism 29, forward running mechanism 28 and reverse running mechanism 29 are two sets, symmetrically installed, located at the upper end and two sides of the main girder of the lower guide beam.

The winch assembly includes a connecting frame 30 and a winch 31. The connecting frame 30 is connected to the inner side of the middle of the main girder. There are four groups of winches that are all connected to the connecting frame. Working independently, the winch is connected with the fixed pulley blocks of the front and rear cranes through wire ropes.

The structure of the front crane and the rear crane is the same, including a crane frame 32, a fixed pulley assembly 33, a movable pulley assembly 34 and a spreader 35, and the crane frame 32 rests on the two main girders 1 On the top, there are horizontal hydraulic cylinders and vertical hydraulic cylinders connected to the crane frame, and can be fine-tuned horizontally and vertically through two hydraulic cylinders; the fixed pulley assembly 33 is fixed on the crane frame, and the serial sling 35 is connected by a wire rope. The upper movable pulley assembly 34 is connected.

The guide beam crane includes a crane frame 36, a connecting rod 37, a side arm 38, a self-propelled mechanism 39, a lifting cylinder 40 and an oil cylinder 41; The self-propelled mechanism 39 rides on two main girders, and the upper end in the crane frame is connected with a lifting oil cylinder 40, and there are four lifting oil cylinders; A connecting rod 37 is connected to the upper end of the crane frame through a hinge device, and an oil cylinder 41 is connected to the side arm at the lower end of the connecting rod. The vertical rod, connecting rod and side arm of the crane frame form a stable triangular structure, and the force is reasonable , reliable structure. There is a self-propelled mechanism 39 on the inner side of the crane frame to realize self-propelled movement. Four lifting cylinders 40 are set to carry the front and rear suspension beam cranes to move. Free-sagging and reduced width dimension for smooth passage through tunnels.

The guide beam crossing crane includes a hanging traveling mechanism 42, a fixed pulley block 43, a moving pulley block 44 and a spreader 45; there are four hanging traveling mechanisms 42, and a group of four is located on the guide rail at the bottom of the main beam. There is a winch on one set of hanging row mechanism, and each winch is connected with the movable pulley block 44 through the fixed pulley block 43 through the steel wire rope, the spreader 45 is installed on the movable pulley block, and the lower guide beam and the front guide beam Lifting connection device for outriggers.

The main girder of the lower guide beam is a rectangular box-shaped structural beam, on which an auxiliary leg forward running track 46 is set, and the side of the upper part forms another small box-shaped structure, and an auxiliary leg reverse running track 47 is set below, and the rear part is set Wing-type hanging fin 48, the central part is provided with a hoisting hole for the hoisting tool of the guide beam crane.

The rear legs of the guide beam are connected to the main beam of the lower guide beam through bolts, and are hinged, so that the bolts can be removed and then folded forward to reduce the height of the guide beam machine at any time. The upper and lower sections are sleeve matching structures, which can be adjusted in height.

The front outrigger of the guide beam is connected with the main beam of the lower guide beam through a pin shaft, and can be folded backward to reduce the height of the guide beam machine when passing through the tunnel. The upper and lower sections are sleeve matching structures, which can be adjusted in height.

In Fig. 1 and Fig. 2, the fixed-point hoisting bridge erecting machine of the tunnel-type down-guiding beam type described in the utility model includes a girder erecting machine and a down-guiding beam machine. The beam erecting machine includes a main beam 1, on the main beam from back to front are O-shaped rear outriggers 2, foldable front outriggers 3, and auxiliary outriggers 4, and a front crane crane 5 is installed on the main beam 1. Rear suspension beam crane 6, hoist assembly 7 is set in the middle of the main beam, guide beam crane track is set on the upper surface of the main beam middle part, the front cantilever beam floor is provided with guide beam passing hole crane suspension track, guide beam crane 8 and The guide beam passing crane 9 runs on the main beam track; the lower guide beam machine has the lower guide beam main beam 10, and the front and rear legs 11 of the guide beam and the rear legs 12 of the guide beam are arranged at the front and rear ends.

In Fig. 1 and Fig. 2, the main girder includes two longitudinal fish-belly box girders 13, the two box girders are connected by three connecting girders, and O-shaped At the installation position of the rear outrigger, a sleeve cavity is arranged inside the center link beam 15;

In Fig. 3, the O-shaped rear outrigger is composed of the lower beam 17, the turning beam 18 and the L-beam 19 connected by bolts to form a positive U-shaped structure, and after being connected to the main beam by bolts, it is composed of the rear connecting beam 14. The O-shaped closed structure has a box-shaped cross-section, and the load-bearing structure is reasonable, which can meet the load-bearing requirements of the hanging beam.

In Figure 3 and Figure 4, the O-shaped rear outrigger L-beam 19 is connected to the main beam O-shaped rear outrigger and the turning beam 18 are equipped with hinged devices 20, after the flange connection bolts are removed, they can be turned around Folding, reducing the width of the whole machine, meeting the requirements of passing through the tunnel;

In FIG. 3 , the lower beam of the O-shaped rear leg is provided with a support cylinder 21 and a running mechanism 22 , and the support cylinder adopts a mechanical locking mechanism to ensure that the piston of the cylinder is not stressed when it is loaded. The traveling mechanism is the rear traveling fulcrum when the beam erecting machine cart travels through the hole.

In Fig. 5, the upper section 23 of the foldable front leg is hinged to the main beam through a pin shaft, and can be folded toward the rear of the main beam after removing the limiting device, so as to be close to the main beam. Driven by the motor, the span of the front outriggers is realized; the middle section 24 and the lower section 25 are provided with connection positions of the spherical joint load-bearing seat 26, and different working conditions of the normal erection and the abutment on the front outriggers are realized through different connections. The lower section is equipped with a box-shaped sleeve, which can adjust the height;

In FIG. 6 , the auxiliary leg is inserted into the sleeve cavity of the intermediate connecting beam 15 by the adjusting inner sleeve 27 , fixed by a pin shaft, and a forward running mechanism 28 and a reverse running mechanism 29 are arranged at the lower part. The forward running mechanism and the O-shaped rear outrigger running mechanism jointly realize the passing of the beam erecting machine, and the reverse running mechanism and the guide beam crane cooperate to complete the guide beam migration through the hole.

In Fig. 7, the hoist assembly is fixed to the inner side of the middle part of the main girder through a connecting frame 30, two hoist 31 work together, and the other two hoist work independently. The fixed pulley blocks are connected.

In Fig. 8, the front suspension beam crane and the rear suspension beam crane are composed of a crane frame 32, a fixed pulley assembly 33, a movable pulley assembly 34, and a spreader 35; the crane frame is mounted on the main girder , and can be fine-tuned horizontally and vertically through the hydraulic cylinder to realize the alignment of the falling beam and the curved beam; the fixed pulley assembly is fixed on the crane frame and connected to the movable pulley block on the serial spreader through a wire rope.

In Fig. 9 and Fig. 10, the guide beam crane is in the shape of Ω, and the hoist frame 36 is reversely buckled on the two main beams in the shape of "┏┒", forming a stable triangle with the connecting rod 37 and the side arm 38. Structure, reasonable force, reliable structure. The crane frame is provided with a self-propelled mechanism 39 to realize self-propelled movement, and four lifting cylinders 40 are provided to carry the front and rear suspension beam cranes to move. Sagging, reducing the width dimension for smooth passage through tunnels.

In Fig. 11, the above-mentioned guide beam crossing crane travels on the guide rail at the bottom of the main beam through four suspension traveling mechanisms 42, and two winches are arranged on it, and the fixed pulley block 43 is connected with the movable pulley block 44 through the steel wire rope. 45 is installed on the movable pulley block, and the hoisting connection device of the lower guide beam and the front leg of the guide beam is set on the spreader.

In Fig. 2 and Fig. 12, the main girder of the lower guide beam is a rectangular box-shaped structural beam, on which auxiliary outriggers are provided with forward running track 46, and the side of the upper part forms another small box-shaped structure, and auxiliary outriggers are arranged in reverse direction. To the running track 47, the rear portion is provided with wing-shaped suspension fins 48, and the middle portion is provided with guide beam crane hoisting spreader hoisting holes.

In Figures 1 and 12, the rear legs of the guide beam are connected to the main beam of the lower guide beam through bolts, and are hinged so that the bolts can be removed and then folded forward to reduce the height of the guide beam machine at any time. The upper and lower sections are sleeve matching structures, which can be adjusted in height.

In Figure 1, the front leg of the guide beam is connected to the main beam of the lower guide beam through a pin shaft, and forms a rigid-flexible double connection with the rear outrigger of the guide beam to maximize the flexibility of the main beam of the lower guide beam under load. curved deformation. It can be folded backward to reduce the height of the overtime guide beam machine. The upper and lower sections are sleeve matching structures, which can be adjusted in height.

The girder erecting method of the tunnel-type lower guide beam type fixed-point hoisting bridge-erecting machine described in the utility model is as follows: the bridge-erecting machine enters the erection state, and the supporting oil cylinder 21 of the O-shaped rear leg 2 of the beam-erecting machine is supported on the erected bridge. On the box girder, the front outrigger 3 is supported on the front of the pier to be spanned, the rear outrigger 12 of the girder guide machine is supported on the front of the pier at the bottom of the front end of the box girder that has been erected, and the front outrigger 11 is supported on the pier to be erected. Across the rear of the pier, the auxiliary outrigger 4 is supported on the main girder 10 of the guide beam. After the beam transport car 49 is loaded with the beam and the bridge erecting machine is docked, the beam trolley 50 is loaded with the beam through the normal running track on the main girder of the guide beam to feed the beam into place, and the hoist assembly 7 drives the rear crane 5 and the front crane. Hanging beam crane 6 lowers the spreader 35 synchronously, and lifts synchronously after connecting the girder. Then the guide beam crane 8 and the auxiliary legs 4 lift the guide beam machine, move it forward about 18m, the spreader 45 of the guide beam crane 9 is lowered to connect the guide beam machine, and then the guide beam crane and the guide beam crane jointly move the The beam guide machine moves forward until its front and rear outriggers are supported at the next span. After the front and rear suspension girder cranes synchronously drop the girder and put it in place, the girder erecting machine can travel to the next straddling position through the O-shaped leg running mechanism 22 and the auxiliary leg running mechanism 28, and re-enter the erection state.

The tunnel-passing girder type fixed-point hoisting bridge-erecting machine described in the utility model is as follows: the front end of the main girder of the guide beam is provided with a gap, which can adapt to the support when the bridge and tunnel are connected. The front and rear ends of the main girder of the girder erecting machine can go deep into the tunnel, which greatly reduces the length of the abutment erected near the tunnel. After the girder is hoisted, the girder crane, the girder crane, and the auxiliary outriggers can lift the girder machine to the top of the abutment, and the girder machine shrinks the front and rear legs to complete the hole and make room for the beam drop.

The tunnel-passing method of the tunnel-type lower guide beam type fixed-point hoisting bridge-erecting machine described in the utility model is as follows:

Step 1: When the front and rear outriggers of the beam guide machine are folded, the auxiliary outrigger 4 and the guide beam passing crane 9 move the beam guide machine back about 6m, and fold the hanging wings 46 forward through internal hoisting. Then the foldable front outrigger can be folded backward after removing the limit device, close to the bottom surface of the main girder, and be fixed. Finally, the beam guide machine continues to move forward 6m to be in place;

Step 2: The jacking bracket 51 on the beam transport vehicle lifts the rear end of the bridge erecting machine, and removes the O-shaped rear outrigger lower beam 17;

Step 3: After the O-shaped rear outriggers are supported on both sides, the jacking bracket is released, the beam transport vehicle drives into the belly of the bridge erecting machine, and the jacking bracket supports the bridge erecting machine again;

Step 4: After removing the bolt connection between the L beam 19 of the O-shaped rear outrigger and the main beam, the whole side is folded forward, close to the main beam and fixed, and then the turning beam 18 is removed from the flange connection with the L beam 19 After the bolts, it is then folded upwards to a horizontal position for fixing. The guide beam crane disassembles the lower end of the connecting rod 37, and hangs down two side arms 38 to reduce the width of the complete machine. The whole folding process is driven by the winch inside the main girder through the wire rope;

Step 4: The jacking bracket and auxiliary outriggers shrink synchronously, reducing the height of the beam erecting machine to the height of the tunnel. The guide beam crane is connected with the guide beam machine. The bridge erecting machine carried by the beam transport vehicle passes through the tunnel;

Step 5: When exiting the tunnel, the beam transporter will directly transport the bridge erecting machine to the beam guide machine directly above the erection position. After the front and rear legs of the guide beam recover the supporting state, the auxiliary outriggers and the guide beam crane will synchronize the guide beam machine fall into place;

Step 6: The beam trolley of the beam transport vehicle is used as the rear point of the beam erecting machine, and travels together with the auxiliary outrigger forward running mechanism to realize the low-level tunneling of the beam erecting machine;

Step 7: Extend the jacking bracket and auxiliary legs, lift the beam erecting machine to the height of the beam erection, and its rear end can go deep into the tunnel, repeat the process from step 3 to step 1 in reverse, and complete the reset of the bridge erecting machine , the beam erection work can be carried out.

Claims (10)

1. A fixed-point lifting bridge-erecting machine with a lower guide beam through a tunnel, characterized in that: the lifting bridge-erecting machine includes a beam erecting machine and a lower guiding beam machine; the beam erecting machine includes a main girder, an O-shaped rear leg , foldable front outriggers, auxiliary outriggers, front crane cranes, rear crane cranes, winch components, guide beam cranes, guide beam passing cranes, lower guide beam main beams, guide beam front outriggers And guide beam rear outriggers, foldable front outriggers and auxiliary outriggers are connected to the bottom surface of the front part of the main beam, and O-shaped rear outriggers are connected to the rear end of the main number beam; The rear crane crane, the hoist assembly is installed in the middle of the main beam, the guide beam crane and the guide beam passing crane are connected on the track on the upper end surface of the main beam, and the guide beam passing crane is located at the front end of the main beam; The lower guide beam machine comprises the front outrigger of the main beam of the lower guide beam and the rear outrigger of the guide beam. 2. According to claim 1, the fixed-point hoisting bridge erecting machine of the tunnel-passing lower guide beam type is characterized in that: the main girder includes a box-shaped girder, a rear connecting beam, a middle connecting beam and a front connecting beam, and the box-shaped There are two beams, which are placed in parallel and are longitudinal fish-belly type. Between the two parallel box girders, there are rear connection beams, middle connection beams and front connection beams, and the two box girders are connected by three connection beams. , the outer side of the main beam at the rear connection beam is provided with the installation position of the O-shaped rear outrigger, and the sleeve cavity is provided inside the middle connection beam. 3. The tunnel-passing lower guide beam type fixed point lifting bridge erecting machine according to claim 1, characterized in that: the O-shaped rear outrigger is composed of a lower beam, a turning beam, an L beam, a hinged device, a supporting cylinder, The running mechanism is composed of one lower beam, and the two ends of the lower beam are sequentially connected with turning beams and L beams to form a U-shaped structure. The openings of the two L beams at the upper end are connected to the main beam by bolts. There is a rear connection beam connected between them to form an O-shaped closed structure. The lower beam, turning beam, L beam, main beam and rear connection beam are all box-shaped structures; between the L beam and the main beam and the O-shaped rear There is a hinged device between the connecting position of the outrigger and the turning beam, which can be flipped and folded around it; the two ends of the bottom surface of the lower crossbeam of the O-shaped rear outrigger are respectively connected with a supporting cylinder and a running mechanism to realize the support of the whole machine and large The car walks. 4. The tunnel-passing lower guide beam type fixed-point lifting bridge erecting machine according to claim 1, characterized in that: the foldable front outriggers include the upper section, the middle section, the lower section of the front outrigger and the load-bearing spherical joint Seat, the upper section of the front outrigger is hinged with the main beam through the pin shaft, the bottom of the middle section and the lower section are connected with spherical hinges, the middle section and the lower section are connected sequentially, and are hinged on one side of the middle section and the lower section, and the middle section is set Box-shaped sleeve, the bearing seat of the ball joint is located at the bottom of the middle section or the lower section. 5. The tunnel-passing lower guide beam type fixed-point hoisting bridge erecting machine according to claim 1, characterized in that: the auxiliary legs include an adjusting inner sleeve, a forward running mechanism and a reverse running mechanism, and the adjusting inner The sleeve is inserted into the sleeve cavity of the middle connecting beam, fixed by the pin shaft, and the lower part of the adjusting inner sleeve is connected with a forward running mechanism and a reverse running mechanism, both of which are two sets , installed symmetrically, located on the upper end and two sides of the main girder of the lower guide beam. 6. The tunnel-passing lower guide beam type fixed-point hoisting bridge erecting machine according to claim 1, characterized in that: the winch assembly includes a connecting frame and a winch, the connecting frame is connected to the inner side of the middle part of the main girder, and the winch has a total of The four groups are all connected to the connecting frame, two groups of winches work together, and the other two groups work independently, and the winches are connected with the fixed pulley blocks of the front and rear cranes through wire ropes. 7. The tunnel-passing lower guide beam type fixed-point hoisting bridge erecting machine according to claim 1, characterized in that: the front suspension beam crane and the rear suspension beam crane have the same structure, and both include a crane frame, The fixed pulley assembly, the movable pulley assembly and the spreader. The crane frame is placed on two main girders. There are horizontal hydraulic cylinders and longitudinal hydraulic cylinders connected with the crane frame. The fixed pulley assembly is fixed on the crane frame. It is connected with the movable pulley assembly on the serial spreader. 8. The tunnel-passing lower guide beam type fixed-point lifting bridge erecting machine according to claim 1, characterized in that: the guide beam crane includes a crane frame, a connecting rod, a side arm, a self-propelled mechanism, and a lifting cylinder and oil cylinders; the crane frame is "┏┓" shape, the two sides of the crane frame are placed on the two main beams through the self-propelled mechanism, and the upper end of the crane frame is connected with a lifting cylinder, and there are four lifting cylinders; the crane frame The lower ends are connected to one end of the side arm through a hinged device, and a connecting rod is connected between the other end of the side arm and the upper end of the crane frame through a hinged device, and an oil cylinder is connected to the side arm at the lower end of the connecting rod, and the vertical rod of the crane frame , connecting rods and side arms form a stable triangular structure, and the arms on both sides are connected to the guide beam and hanging wings through oil cylinders. 9. The tunnel-passing lower guide beam type fixed-point lifting bridge erecting machine according to claim 1, characterized in that: the guide beam passing crown crane includes a hanging running mechanism, a fixed pulley block, a movable pulley block and a spreader, There are four hanging travel mechanisms, four of which are located on the guide rail at the bottom of the main beam. There is a winch on a set of hanging travel mechanisms. The lifting tool is installed on the movable pulley block, and the lifting connection device of the lower guide beam and the front leg of the guide beam is set on the spreader; The main girder of the lower guide beam is a rectangular box-shaped structural beam, on which auxiliary outriggers are provided with a forward running track, and the side of the upper part forms another small box-shaped structure, and the auxiliary outriggers are provided with a reverse running track, and the rear part is provided with a wing-shaped track. Hanging wings, the middle part is equipped with hoisting holes for hoisting hoisting tools of the guide beam crane. 10. The tunnel-type lower guide beam type fixed-point lifting bridge erecting machine according to claim 1, characterized in that: the rear legs of the guide beam are connected to the main beam of the lower guide beam through bolts, and are hinged; the upper and lower joints It is a sleeve matching structure; the front leg of the guide beam is connected with the main beam of the lower guide beam through a pin shaft.

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