Portable bridge fabrication machine

Abstract

The utility model discloses a portable bridge fabrication machine which comprises a main truss and a walking mechanism, the walking mechanism comprises a lifting oil cylinder, walking wheels, a track beam and a front support, a first cylinder body of the lifting oil cylinder is fixedly connected with the main truss, the walking wheels are connected with a first piston rod of the lifting oil cylinder, and the track beam is arranged below the walking wheels. The front support is fixedly arranged at the bottom of the main truss. According to the walking mechanism, tracks do not need to be laid on a bridge floor in advance, the walking action of the main truss is achieved through the cooperation of the liftable walking wheels and the track beams, the gravity center of the main truss can be low in the walking and concrete pouring process, and the overturning risk of the portable bridge fabrication machine can be reduced. Meanwhile, the device is further provided with a reverse buckling wheel overturn-preventing mechanism, a mold opening and closing mechanism and a folding door curtain, and has the advantages of being stable in operation, low in manufacturing cost, convenient to install and construct, high in reliability and the like.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge construction equipment, specifically to a lightweight bridge building machine. Background Technology

[0002] A bridge-building machine, also known as a bridge-construction machine, is a type of machinery specifically designed for bridge construction. It can complete multiple stages of the overall bridge construction process, such as pouring concrete. The use of bridge-building machines can significantly improve the efficiency and quality of bridge construction while reducing the input of manpower and resources.

[0003] The main truss is an important supporting structure of the bridge-building machine. A template is suspended in front of the main truss. The template includes an inner mold and an outer mold. After the inner mold and the outer mold are closed, they form the casting space for the box girder. After a section of the box girder is cast through the template, the template needs to be opened. The main truss carries the template forward. After it reaches the position, the template is closed to cast the next section of the box girder. This process is repeated to complete the casting of the entire box girder.

[0004] The existing main truss traveling mechanism includes a track laid on the bridge deck (top surface of the box girder), with sliders mounted on the track. The bottom of the main truss is fixed to the sliders, and the main truss travels by cooperating with the track. The disadvantage is that the traveling mechanism with track and sliders raises the center of gravity of the main truss, and an excessively high center of gravity increases the risk of the bridge-building machine tipping forward. Utility Model Content

[0005] The purpose of this invention is to provide a lightweight bridge-building machine.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] A lightweight bridge-building machine includes a main truss and a traveling mechanism. The traveling mechanism includes a lifting cylinder, a traveling wheel, a track beam, and a front support. The first cylinder of the lifting cylinder is fixedly connected to the main truss. The traveling wheel is connected to the first piston rod of the lifting cylinder. The track beam is located below the traveling wheel. The front support is fixedly located at the bottom of the main truss.

[0008] As a further improvement of the present invention, the main truss includes a telescopic beam, which includes a bottom chord beam, an outer beam, and an inner beam arranged sequentially from the outside to the inside. It also includes a telescopic hydraulic cylinder located inside the inner beam. The front end of the second piston rod of the telescopic hydraulic cylinder is connected and fixed to the bottom chord beam, and the front end of the second cylinder body of the telescopic hydraulic cylinder is connected and fixed to the outer beam. A pulley is provided at the rear end of the second cylinder body, and a transmission cable is wound on the pulley. The two ends of the transmission cable are fixedly connected to the front end of the bottom chord beam and the front end of the inner beam, respectively.

[0009] The second piston rod is provided with a joint part for connecting an oil pipe near the front end, and the joint part is communicated with the inside of the second cylinder through a first oil hole and a second oil hole formed in the second piston rod.

[0010] As a further improved technical scheme of the utility model, the anti-overturning mechanism of the reverse buckle wheel further comprises a rear pressing beam, the rear pressing beam is press-fitted at the rear part of the main truss, and the rear pressing beam is anchored and connected with the built box girder through the fine rolled threaded steel.

[0011] The rear cross beam is arranged above the built box girder and is pressed on the rear part of the main truss, the rear bow beams are arranged on both sides of the rear cross beam, the upper ends of the rear bow beams are fixedly connected with the rear cross beam, the lower ends of the rear bow beams extend below the flanges of the built box girder, the rear mounting beams are connected with the rear bow beams, and the reverse buckle wheels for cooperating with the bottom surfaces of the flanges of the built box girder are arranged on the rear mounting beams.

[0012] The rear beam body can synchronously walk with the main truss through the first connecting piece.

[0013] As a further improved technical scheme of the utility model, the anti-overturning mechanism of the reverse buckle wheel further comprises a rear pressing beam, the rear pressing beam is press-fitted at the rear part of the main truss, and the rear pressing beam is anchored and connected with the built box girder through the fine rolled threaded steel.

[0014] As a further improved technical scheme of the utility model, the opening and closing mold mechanism is further included.

[0015] The opening and closing mold mechanism comprises a sliding beam for bearing an outer mold, and further comprises a front beam body and a middle beam body, the front beam body is arranged on both sides of a front cross beam, and the middle beam body is arranged on both sides of a door curtain.

[0016] The front beam body comprises a front bow beam and a front mounting beam, the top of the front bow beam is fixedly connected with the front cross beam, the bottom of the front bow beam is connected with the front mounting beam, and the front mounting beam is horizontally arranged.

[0017] The middle beam body comprises a middle bow beam and a middle mounting beam, the top of the middle bow beam is fixedly connected with the door curtain, the bottom of the middle bow beam is connected with the middle mounting beam, and the middle mounting beam is horizontally arranged.

[0018] The front mounting beam is provided with a front vertical driving assembly, the front vertical driving assembly is rigidly connected with the front end of the sliding beam, so as to drive the front end of the sliding beam to move in the vertical direction, and the front mounting beam is further provided with a front horizontal driving assembly, so as to drive the front vertical driving assembly and the front end of the sliding beam to move in the horizontal direction.

[0019] The middle vertical drive assembly is hard connected with the rear end of the sliding beam to drive the rear end of the sliding beam to move in the vertical direction.

[0020] As a further improved technical scheme of the present application, the front vertical drive assembly comprises a front sliding plate, a front vertical worm base and a front vertical worm, the front sliding plate is in sliding fit with the front mounting beam, the front vertical worm base is arranged on the front sliding plate, and the top of the front vertical worm is connected with the front end of the sliding beam.

[0021] The front horizontal drive assembly comprises a front horizontal worm base, a front horizontal worm and a front abutting block, the front abutting block is fixedly connected with the front mounting beam, and the front horizontal worm base and the front horizontal worm are arranged between the front abutting block and the front sliding plate.

[0022] As a further improved technical scheme of the present application, the middle vertical drive assembly comprises a middle sliding plate, a middle vertical worm base and a middle vertical worm, the middle sliding plate is in sliding fit with the middle mounting beam, the middle vertical worm base is arranged on the middle sliding plate, and the top of the middle vertical worm is connected with the rear end of the sliding beam.

[0023] The middle horizontal drive assembly comprises a middle horizontal worm base, a middle horizontal worm and a middle abutting block, the middle abutting block is fixedly connected with the middle mounting beam, and the middle horizontal worm base and the middle horizontal worm are arranged between the middle abutting block and the middle sliding plate.

[0024] As a further improved technical scheme of the present application, the folding door screen further comprises two groups of door screen bodies arranged in mirror image symmetry, and a connecting mechanism arranged between the two groups of door screen bodies, the connecting mechanism can adjust the spacing of the two groups of door screen bodies, so that the width of the folding door screen is adjustable.

[0025] Each group of the door screen bodies comprises two lower cross beams arranged in parallel and at intervals, and an upper cross beam located between the two lower cross beams, a plurality of first connecting rods are arranged between the upper cross beam and the lower cross beams, and the first connecting rods are hingedly connected with the lower cross beams and the upper cross beam, so that the upper cross beam can be folded and stored between the two lower cross beams.

[0026] As a further improved technical scheme of the present application, the upper cross beams of the two groups of door screen bodies are provided with fixing plates, and the connecting mechanism comprises a first screw rod and a connecting plate.

[0027] The first screw rod is arranged through the through hole of the fixing plate and connected with the fixing plate through a nut, so as to adjust the spacing of the upper sides of the two groups of door screen bodies through the fixed positions of the first screw rod and the fixing plate.

[0028] The connecting plate is connected with the lower cross beam through bolts matched with the connecting holes to adjust the distance between the two groups of curtain bodies on the lower side by selecting the connecting holes.

[0029] As a further improved technical scheme of the present application, the door curtain body further comprises a connecting head for fixing the upper cross beam on the main truss vertical rod, the connecting head comprises a large end for limiting and a small end for connecting with the upper cross beam, a plurality of first pin holes are arranged on the small end, and a plurality of second pin holes are arranged on the upper cross beam.

[0030] Compared with the prior art, the technical effect of the present application is that:

[0031] The walking mechanism of the present application does not need to pre-lay tracks on the bridge deck, and the walking action of the main truss is realized through the cooperation of the liftable walking wheels and the track beams, so that the main truss has a low center of gravity during walking and pouring concrete, which is beneficial to reduce the risk of overturning of the light bridge builder. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic diagram of the three-dimensional structure of the main truss in the embodiment of the present application;

[0033] Figure 2 is a schematic diagram of the cross-sectional structure of the main truss in the embodiment of the present application;

[0034] Figure 3 is Figure 2 a schematic diagram of the local enlarged structure at F in the embodiment of the present application;

[0035] Figure 4 is a schematic diagram of the three-dimensional structure of the telescopic beam in the embodiment of the present application;

[0036] Figure 5 is a schematic diagram of the cross-sectional structure of the telescopic beam in the embodiment of the present application;

[0037] Figure 6 is Figure 5 a schematic diagram of the local enlarged structure at E in the embodiment of the present application;

[0038] Figure 7 is a schematic diagram of the exploded structure of the telescopic beam in the embodiment of the present application;

[0039] Figure 8 is a schematic diagram of the three-dimensional structure of the light bridge builder for displaying the anti-overturning mechanism of the reverse buckling wheel in the embodiment of the present application;

[0040] Figure 9 is Figure 8 a schematic diagram of the local enlarged structure at A in the embodiment of the present application;

[0041] Figure 10 is a schematic diagram of a perspective structure of a rear beam body in the embodiment of the utility model;

[0042] Figure 11 is a schematic diagram of a perspective structure of a portable bridge builder for displaying a mold opening and closing mechanism in the embodiment of the utility model;

[0043] Figure 12 is Figure 11 is a schematic diagram of a partial enlarged structure at C in the embodiment;

[0044] Figure 13 is a schematic diagram of a right view structure of a portable bridge builder in the embodiment of the utility model;

[0045] Figure 14 is Figure 13 is a schematic diagram of a partial enlarged structure at D in the embodiment;

[0046] Figure 15 is a schematic diagram of a perspective structure of a folding door curtain in the embodiment of the utility model;

[0047] Figure 16 is a schematic diagram of a perspective structure of a portable bridge builder for displaying a folding door curtain in the embodiment of the utility model;

[0048] Figure 17 is Figure 16 is a schematic diagram of a partial enlarged structure at B in the embodiment. DETAILED DESCRIPTION

[0049] The utility model will be described in detail below in combination with the specific embodiments shown in the drawings. However, these embodiments do not limit the utility model, and the changes in structure, method or function made by those skilled in the art based on these embodiments are all included in the protection scope of the utility model.

[0050] Some names appearing in this paper will be explained below:

[0051] The box girder is a kind of existing bridge structure, and the built box girder refers to the box girder after pouring and concrete solidification, which can be regarded as a stable installation platform.

[0052] The flange refers to the edge extending out at the top of the box girder.

[0053] The main truss is an important support structure of the bridge builder, and the bridge builder usually includes two groups of main trusses in the form of diamond frame.

[0054] The front cross beam is a horizontal beam body fixed at the front end of the main truss.

[0055] The door curtain is a connecting structure fixed in the middle of the main truss, which is used to connect the two groups of main trusses into one.

[0056] Please refer toFigures 1 to 3 The utility model provides a light bridge -building machine, including main truss 200, travelling mechanism, the travelling mechanism includes lifting oil cylinder 71, travelling wheel 72, track beam 73, front support 79, the first cylinder body 711 of lifting oil cylinder 71 is fixedly connected with main truss 200, travelling wheel 72 is connected with the first piston rod 712 of lifting oil cylinder 71, track beam 73 is set below travelling wheel 72, and front support 79 is fixedly set at the bottom of main truss 200.

[0057] Specifically, the first cylinder body 711 is fixedly connected with the bottom chord beam 201 of the main truss 200, the front support 79 is fixed at the bottom of the bottom chord beam 201, the travelling wheel 72 includes a wheel body and a wheel seat, the wheel body is installed on the wheel seat through a rotating shaft, and the wheel seat of the travelling wheel 72 is connected with the first piston rod 712. When the travelling wheel 72 is not pressed on the track beam 73, the track beam 73 can be moved in the front-back direction under the manual pushing and pulling.

[0058] When the position of the main truss 200 is fixed, the front support 79 is directly pressed on the bridge deck, the first piston rod 712 lifts the travelling wheel 72, and at this time, the track beam 73 is not stressed; when the main truss 200 needs to walk forward, the track beam 73 is first pulled forward, the track beam 73 is adjusted to the position after being pulled forward, the first piston rod 712 lowers the travelling wheel 72, and the main truss 200 is lifted until the front support 79 slightly leaves the bridge deck, at this time, the travelling wheel 72 can roll on the track beam 73, so that the main truss 200 walks forward.

[0059] The travelling mechanism of the utility model does not need to lay a track on the bridge deck in advance, the walking action of the main truss 200 is realized through the cooperation of the liftable travelling wheel 72 and the track beam 73, the main truss 200 has a relatively low center of gravity in the process of walking and pouring concrete, and the overturning risk of the light bridge-building machine is reduced.

[0060] In the prior art, the bottom of the main truss is usually provided with a telescopic beam, an oil cylinder is arranged in the telescopic beam, and when the main truss needs to be adjusted in position, the oil cylinder drives the telescopic beam to elongate, so that the main truss walks forward.

[0061] The existing telescopic beam of the main truss is usually a two-section telescopic beam composed of the bottom chord beam of the main truss and an inner beam arranged in the bottom chord beam, and the length of the elongation of the inner beam is the stroke of the main truss in the walking process, which means that the inner beam needs to be elongated by a relatively long length to ensure the stroke of the main truss in a single walking. The formwork is suspended at the front end of the main truss, and downward force is transmitted to the front end of the bottom chord beam, so that the bottom chord beam has a tendency of being pressed downward at the front end and being lifted at the rear end, and further, the friction force between the inner wall of the bottom chord beam and the outer wall of the inner beam increases in a geometric multiple when the inner beam is elongated beyond the center point of the inner beam, and the walking resistance of the main truss becomes very large.

[0062] The existing telescopic beam cylinder is provided with a joint for connecting an oil pipe at a position close to both ends of the cylinder body (the joint is arranged along the radial direction of the cylinder body and protrudes from the cylinder body), and the joint is communicated with the inside of the cylinder body through an oil hole (coaxially arranged with the joint) on the cylinder body. The traditional cylinder provided with the joint at both ends of the cylinder body occupies a large space and cannot be well adapted to the installation and use in the narrow space in the telescopic beam.

[0063] Please refer to Figures 4 to 7 In the embodiment, the main truss 200 comprises a telescopic beam, the telescopic beam comprises a bottom chord beam 201, an outer beam 202 and an inner beam 203 which are sequentially sleeved from outside to inside, and further comprises a telescopic cylinder 6 located inside the inner beam 203, a front end of a second piston rod 61 of the telescopic cylinder 6 is fixedly connected with the bottom chord beam 201, a front end of a second cylinder body 62 of the telescopic cylinder 6 is fixedly connected with the outer beam 202, a rear end of the second cylinder body 62 is provided with a pulley 7, a transmission cable 8 is wound around the pulley 7, and both ends of the transmission cable 8 are fixedly connected with the front end of the bottom chord beam 201 and the front end of the inner beam 203 respectively.

[0064] It should be noted that the outer beam 202 is called with respect to the inner beam 203, and actually the outer beam 202 is located between the bottom chord beam 201 and the inner beam 203.

[0065] The front end of the second piston rod 61 is fixed by a positioning pin (not shown) with the bottom chord beam 201, and the front end of the second cylinder body 62 is fixed with the front end of the outer beam 202, so that when the telescopic cylinder 6 operates, the second cylinder body 62 drives the outer beam 202 to elongate or shorten.

[0066] When the second cylinder body 62 moves backward, force is applied to the transmission cable 8 through the pulley 7, and then the inner beam 203 is pulled to elongate by the transmission cable 8.

[0067] After the main truss 200 finishes walking, the inner beam 203 can be pushed back manually, or a set of pulleys and transmission cables are further arranged, so that the inner beam 203 can be automatically retracted under the driving of the telescopic cylinder 6. Specifically, the working principle of the pulleys and transmission cables for driving the inner beam 203 to automatically retract is similar to that of the pulley 7 and the transmission cable 8 for driving the inner beam 203 to elongate, and the difference lies in that the pulleys for driving the inner beam 203 to automatically retract are arranged at the front end of the second cylinder body 62, and both ends of the transmission cable are fixedly connected with the rear end of the bottom chord beam 201 and the rear end of the inner beam 203. The retraction mode of the inner beam 203 is not limited in the utility model.

[0068] A joint part 611 for connecting an oil pipe is arranged at a position close to the front end of the second piston rod 61, and the joint part 611 is communicated with the inside of the second cylinder body 62 through a first oil hole 63 and a second oil hole 64 which are arranged in the second piston rod 61.

[0069] Specifically, the first oil hole 63 and the second oil hole 64 are respectively in communication with the spaces on both sides of the second cylinder body 62.

[0070] When the first oil hole 63 supplies oil to the second cylinder body 62, the second oil hole 64 returns oil, and at this time, the second cylinder body 62 is elongated; when the second oil hole 64 supplies oil to the second cylinder body 62, the first oil hole 63 returns oil, and at this time, the second cylinder body 62 is shortened.

[0071] It should be noted that the joint part 611 is block-shaped, and a plurality of oil paths are arranged in the joint part 611 as needed. In actual application, not only can the two joints of the telescopic oil cylinder 6 used for driving the telescopic beam to run be integrated on the joint part 611, but also the joints of other oil cylinders (for example, the lifting oil cylinder 71) of the main truss can be integrated on the joint part 611.

[0072] In the embodiment, an electromagnetic valve (not shown, fixed on the top surface of the joint part 611 and in communication with the oil path of the joint part 611) is arranged on the joint part 611, and the joint part 611 is connected with the oil pipe through the electromagnetic valve.

[0073] In other embodiments, the oil pipe can be directly connected with the joint part 611, and the electromagnetic valve or other valve body is arranged outside the telescopic beam.

[0074] In the embodiment, the outer beam 202 is provided with a first roller 2021 matched with the inner wall of the bottom chord beam 201. The first roller 2021 is used to reduce the friction between the outer beam 202 and the bottom chord beam 201.

[0075] In the embodiment, the inner beam 203 is provided with a second roller 2031 matched with the inner wall of the outer beam 202. The second roller 2031 is used to reduce the friction between the inner beam 203 and the outer beam 202.

[0076] The three-section structure composed of the bottom chord beam 201, the outer beam 202 and the inner beam 203 divides the stroke of the main truss into the outer beam 202 and the inner beam 203. The outer beam 202 does not need to be too long to extend out of the bottom chord beam 201, and the inner beam 203 does not need to be too long to extend out of the outer beam 202, so as to meet the single walking stroke of the main truss 200, which is beneficial to inhibit the friction between the telescopic beam bodies and make the main truss 200 run smoothly. Meanwhile, the joints of the two oil paths required by the telescopic oil cylinder 6 are integrated on the front end of the second piston rod 61, and the first oil hole 63 and the second oil hole 64 arranged in the second piston rod 61 are used to connect the joint part 611 and the inside of the second cylinder body 62, which has the characteristics of small occupied installation space, and is especially suitable for installation and use in a small space in the telescopic beam.

[0077] In the prior art, the gravity center of the bridge building machine is naturally located at the front (the side of the formwork), so an anti-overturning mechanism is arranged near the rear side of the bridge building machine to prevent the bridge building machine from overturning forward.

[0078] The anti-overturning mechanism in the prior art generally comprises a counter wheel and a track. The track is connected and fixed to the top of the built box girder through a connecting piece (the vertical pier is a vertical steel reinforcement that needs to be pre-buried and anchored on the box girder), and the main truss of the bridge building machine is matched with the track through the counter wheel.

[0079] The anti-overturning mechanism in the prior art has the disadvantages of high cost, great installation and construction difficulty, and poor reliability. Specifically, the structure is complex and a large number of pre-buried parts (mainly vertical piers) need to be repeatedly disassembled, which leads to high cost and great installation and construction difficulty; the pre-buried parts need to be repeatedly disassembled by manual work, and if the anchor points are not uniformly distributed or are not firmly welded, local stress concentration may occur, which may cause deformation or fracture of the connecting structure of the track, and the reliability is poor.

[0080] Please refer to Figures 8 to 10 In the embodiment, the light bridge building machine further comprises a counter wheel anti-overturning mechanism, the counter wheel anti-overturning mechanism comprises a rear beam body 100, the rear beam body 100 comprises a rear cross beam 101, a rear bow beam 102, and a rear mounting beam 103.

[0081] The rear cross beam 101 is arranged above the built box girder 400 and presses the rear part of the main truss 200 of the light bridge building machine, the rear bow beam 102 is located on both sides of the rear cross beam 101, the upper end of the rear bow beam 102 is fixedly connected with the rear cross beam 101, the lower end of the rear bow beam 102 extends below the flange 401 of the built box girder 400, and the rear mounting beam 103 is connected with the rear bow beam 102, and the rear mounting beam 103 is provided with a counter wheel 104 for cooperating with the bottom surface of the flange 401 of the built box girder 400.

[0082] The first connecting piece is further arranged to enable the rear beam body 100 to walk synchronously with the main truss 200.

[0083] The formwork 300 is suspended in front of the main truss 200, after a section of the box girder 400 is poured through the formwork 300, the main truss 200 needs to be adjusted to walk forward with the formwork 300, so as to pour the next section of the box girder 400, and the pouring of the entire box girder 400 is completed through the reciprocating operation. The first connecting piece is used to connect the rear beam body 100 and the main truss 200, so as to ensure that the rear beam body 100 moves synchronously during the walking of the main truss 200, and is always pressed on the rear part of the main truss 200, thereby preventing the main truss 200 from overturning forward.

[0084] In the embodiment, the door curtain body 500 is connected in the middle of the main truss 200, both sides of the door curtain body 500 are connected with the middle beam body, the middle beam body comprises a middle arch beam 601 and a middle mounting beam 602, the middle mounting beam 602 is connected with the sliding beam 1.

[0085] The first connecting piece is two groups of second connecting rods 111 (each group of second connecting rods 111 is two, one on each side), one group of second connecting rods 111 connects the rear arch beam 102 and the middle arch beam 601, and the other group of second connecting rods 111 connects the rear mounting beam 103 and the sliding beam 1.

[0086] During the walking process of the main truss 200, the positions of the door curtain body 500, the middle beam body and the sliding beam 1 relative to the main truss 200 are fixed, after the second connecting rod 111 connects the rear arch beam 102, the middle arch beam 601, the rear mounting beam 103 and the sliding beam 1, the rear beam body 100 is indirectly connected with the main truss 200 as an integrated structure, so as to overcome the frictional force between the reverse buckle wheel 104 and the bottom surface of the flange 401, and make the rear beam body 100 and the main truss 200 walk synchronously. Since the connection positions (the rear arch beam 102 and the rear mounting beam 103) of the second connecting rod 111 on the rear beam body 100 are close to the reverse buckle wheel 104 (a component generating frictional force during the walking process), the synchronization of the walking of the rear beam body 100 and the main truss 200 can be more reliably guaranteed, which is a preferred first connecting piece embodiment.

[0087] Of course, in other embodiments, bolts can also be used as the first connecting piece, the rear beam body 100 and the main truss 200 are directly connected and fixed at the pressing position of the rear cross beam 101 and the main truss 200, so that the rear beam body 100 can walk synchronously with the main truss 200.

[0088] In the embodiment, a plurality of third pin holes 115 are arranged on the rear arch beam 102 in the vertical direction, and the rear mounting beam 103 is connected with the rear arch beam 102 through a first positioning pin 116 penetrating the third pin hole 115, so that the distance between the reverse buckle wheel 104 and the bottom surface of the flange 401 of the built box girder 400 can be adjusted. During installation, the position of the reverse buckle wheel 104 should be adjusted according to the specifications of the actual box girder 400, so that the reverse buckle wheel 104 is arranged close to or abutting against the bottom surface of the flange 401.

[0089] Further, the reverse buckle wheel 104 comprises a first wheel seat 1041 and a plurality of first wheel bodies 1042, the first wheel seat 1041 is fixedly connected with the rear mounting beam 103, and the plurality of first wheel bodies 1042 are connected with the first wheel seat 1041 through rotating shafts.

[0090] Further, the rear cross beam 101 is connected with the built box girder 400 through the precision rolled threaded steel 2.

[0091] Further, the anti-overturning mechanism of the reverse buckle wheel further comprises a rear pressing beam 112, which is press-fitted at the rear of the main truss 200, and is anchored and connected to the built box girder 400 through the fine rolled threaded steel 2.

[0092] It should be noted that the fine rolled threaded steel 2 is fixedly connected to the built box girder 400, and the rear cross beam 101 and the rear pressing beam 112 are connected to the fine rolled threaded steel 2 through the first nut 113 and the gasket 114. Before the concrete pouring in the formwork 300, the rear cross beam 101 is anchored and connected to the built box girder 400 through the fine rolled threaded steel 2, and the rear pressing beam 112 is also anchored and connected to the built box girder 400 through the fine rolled threaded steel 2, both of which are to strengthen the load-bearing capacity of the anti-overturning mechanism. After the pouring is completed, when the concrete in the formwork 300 is solidified and formed, the anchoring connection between the rear cross beam 101, the rear pressing beam 112 and the built box girder 400 can be disconnected by loosening the first nut 113 connected to the fine rolled threaded steel 2 or cutting off the fine rolled threaded steel 2, at this time the main truss 200 can walk forward, and the anti-overturning is only realized by the reverse buckle wheel 104 buckling on the bottom surface of the flange 401.

[0093] If the reverse buckle wheel 104 is only close to the bottom surface of the flange 401 without abutting against it (with a small gap) when the rear beam body 100 is installed. After the anchoring connection between the rear cross beam 101, the rear pressing beam 112 and the built box girder 400 is disconnected, the light bridge making machine will slightly tilt forward, and the reverse buckle wheel 104 will then be raised to abut against the bottom surface of the flange 401 to realize the anti-overturning effect.

[0094] The reverse buckle wheel 104 cooperates with the bottom surface of the flange 401 of the built box girder 400 to prevent overturning during the walking of the main truss 200, without the need to set a track cooperating with the reverse buckle wheel 104, which is simple in structure and saves the process of repeatedly disassembling a large number of pre-buried parts for installing the track, has the advantages of low cost and convenient installation and construction; the reverse buckle wheel 104 directly cooperates with the bottom surface of the flange 401 of the built box girder 400, and there is no problem of deformation or fracture of the existing track connection structure, and the reliability of anti-overturning is high.

[0095] In the prior art, the sliding beam is a beam body for bearing the outer mold. When pouring concrete, the front end of the sliding beam is anchored and connected to the front cross beam through the fine rolled threaded steel, and the rear end of the sliding beam is anchored and connected to the built box girder through the fine rolled threaded steel. When it is necessary to open the mold and adjust the formwork to walk forward, the fine rolled threaded steel connected to the sliding beam is disconnected, the front end of the sliding beam is connected to the front cross beam through the steel cable of the manual hoist, and the rear end of the sliding beam is connected to the door curtain through the steel cable of the manual hoist. When the mold is opened, the workers put down the sliding beam through the manual hoist, so that the top of the outer mold is away from the bottom of the flange of the box girder. When walking to the position where the mold needs to be closed, the sliding beam is also lifted up through the manual hoist, so that the top of the outer mold is flush with the bottom of the flange of the built box girder, and then the sliding beam is anchored and connected to the built box girder through the fine rolled threaded steel.

[0096] The prior art adjusts the height of the sliding beam by the steel cable of the manual hoist, and then completes the opening and closing of the outer mold. The disadvantage is that the outer mold cannot move horizontally when opening the mold, and the straight plate in the vertical direction of the outer mold will still be in frictional contact with the outer side of the box girder. When the formwork moves forward, the resistance is large and the box girder outer side is easy to scratch. At the same time, since the steel cable is a soft material, the outer mold is easy to shake during the forward movement of the formwork, which has safety hazards.

[0097] Please refer to Figures 11 to 14 In the embodiment, the portable bridge builder also includes an opening and closing mechanism;

[0098] The opening and closing mechanism includes a sliding beam 1 for carrying the outer mold 301, and a front beam body 700 and a middle beam body 600. The front beam body 700 is arranged on both sides of the front cross beam 3, and the middle beam body 600 is arranged on both sides of the door curtain body 500 (in other embodiments, the folding door curtain formed by the door curtain body 500 can be replaced by a traditional structure of the door curtain connected with the middle beam body 600).

[0099] It should be noted that the front beam body 700 and the middle beam body 600 are both hard structures made of steel. The front beam body 700 is fixedly connected with the front cross beam 3, and the middle beam body 600 is fixedly connected with the door curtain body 500.

[0100] The front beam body 700 includes a front bow beam 701 and a front mounting beam 702. The top of the front bow beam 701 is fixedly connected with the front cross beam 3, and the bottom of the front bow beam 701 is connected with the front mounting beam 702. The front mounting beam 702 is arranged horizontally.

[0101] The middle beam body 600 includes a middle bow beam 601 and a middle mounting beam 602. The top of the middle bow beam 601 is fixedly connected with the door curtain body 500, and the bottom of the middle bow beam 601 is connected with the middle mounting beam 602. The middle mounting beam 602 is arranged horizontally.

[0102] The front mounting beam 702 is provided with a front vertical driving assembly 10, which is hard connected with the front end of the sliding beam 1 to drive the front end of the sliding beam 1 to move in the vertical direction. The front mounting beam 702 is also provided with a front horizontal driving assembly 20 to drive the front vertical driving assembly 10 with the front end of the sliding beam 1 to move in the horizontal direction.

[0103] Similar to the front vertical driving assembly 10 arranged on the front mounting beam 702, the middle mounting beam 602 is provided with a middle vertical driving assembly 30, which is rigidly connected with the rear end of the sliding beam 1 to drive the rear end of the sliding beam 1 to move in the vertical direction. Similar to the front horizontal driving assembly 20 arranged on the front mounting beam 702, the middle mounting beam 602 is also provided with a middle horizontal driving assembly 40 to drive the middle vertical driving assembly 30 to move in the horizontal direction with the rear end of the sliding beam 1.

[0104] By driving the sliding beam 1 to move horizontally through the front horizontal driving assembly 20 and the middle horizontal driving assembly 40, the straight plate part of the outer mold 301 (the straight plate part of the outer mold 301 refers to the part arranged in the vertical direction of the outer mold 301) can be separated from the outer side of the box girder 400 when the mold is opened, and the resistance of the formwork when advancing forward is small and the outer side of the box girder 400 will not be scratched.

[0105] By arranging the front beam body 700 and the middle beam body 600 as mounting platforms, and the front vertical driving assembly 10 and the middle vertical driving assembly 30 for driving the sliding beam 1 to move up and down are all rigidly connected with the sliding beam 1, the outer mold 301 runs stably and is not easy to shake during the advancing process of the formwork.

[0106] In the embodiment, the front vertical driving assembly 10 includes a front sliding plate 11, a front vertical worm base 12, and a front vertical worm 13. The front sliding plate 11 is in sliding fit with the front mounting beam 702. The front vertical worm base 12 is arranged on the front sliding plate 11. The top of the front vertical worm 13 is connected with the front end of the sliding beam 1.

[0107] The front sliding plate 11 can slide horizontally on the front mounting beam 702 in the opening and closing direction of the mold. The front vertical worm base 12 is fixedly connected with the front sliding plate 11. By rotating the handle on the front vertical worm base 12, the front vertical worm 13 can be driven to elongate or shorten, thereby driving the front end of the sliding beam 1 to rise or lower.

[0108] The front horizontal driving assembly 20 includes a front horizontal worm base 21, a front horizontal worm 22, and a front abutting block 23. The front abutting block 23 is fixedly connected with the front mounting beam 702. The front horizontal worm base 21 and the front horizontal worm 22 are arranged between the front abutting block 23 and the front sliding plate 11.

[0109] The front horizontal worm base 21 is fixedly connected with the front sliding plate 11. The front horizontal worm 22 is fixedly connected with the front abutting block 23. By rotating the handle on the front horizontal worm base 21, the front horizontal worm 22 can be driven to elongate or shorten, thereby driving the front sliding plate 11 to move horizontally in the opening and closing direction of the mold.

[0110] In the embodiment, the middle vertical driving assembly 30 comprises a middle sliding plate 31, a middle vertical worm base 32 and a middle vertical worm 33. The middle sliding plate 31 is in sliding fit with the middle mounting beam 602. The middle vertical worm base 32 is arranged on the middle sliding plate 31. The top of the middle vertical worm 33 is connected with the rear end of the sliding beam 1.

[0111] The middle sliding plate 31 can slide horizontally on the middle mounting beam 602 along the opening and closing direction of the mold. The middle vertical worm base 32 is fixedly connected with the middle sliding plate 31. The middle vertical worm 33 can be driven to elongate or shorten by rotating the handle on the middle vertical worm base 32, so as to drive the rear end of the sliding beam 1 to rise or lower.

[0112] The middle horizontal driving assembly 40 comprises a middle horizontal worm base 41, a middle horizontal worm 42 and a middle abutting block 43. The middle abutting block 43 is fixedly connected with the middle mounting beam 602. The middle horizontal worm base 41 and the middle horizontal worm 42 are arranged between the middle abutting block 43 and the middle sliding plate 31.

[0113] The middle horizontal worm base 41 is fixedly connected with the middle abutting block 43. The middle horizontal worm 42 is fixedly connected with the middle sliding plate 31. The middle horizontal worm 42 can be driven to elongate or shorten by rotating the handle on the middle horizontal worm base 41, so as to drive the middle sliding plate 31 to move horizontally along the opening and closing direction of the mold.

[0114] In the embodiment, two sliding beams 1 are arranged on each side of the outer mold 301. The two sliding beams 1 on the same side are arranged in parallel and spaced apart. The front ends of the two sliding beams 1 are fixedly connected by screw and nut cooperation. The rear ends of the two sliding beams 1 are also fixedly connected by screw and nut cooperation, so as to connect the two sliding beams 1 into one.

[0115] When the mold opening operation is performed, the finished rolled threaded steel 2 connected with the sliding beam 1 is first disconnected. Then the handle on the front vertical worm base 12 and the middle vertical worm base 32 is rotated to lower the sliding beam 1, so as to make the top of the outer mold 301 away from the bottom of the flange 401 of the box girder 400. Then the handle on the front horizontal worm base 21 and the middle horizontal worm base 41 is rotated to horizontally move the sliding beam 1 outward, so as to separate the straight plate part of the outer mold 301 from the outer side surface of the box girder 400.

[0116] When the mold closing operation is performed, the handle on the front horizontal worm base 21 and the middle horizontal worm base 41 is rotated in reverse to horizontally move the sliding beam 1 inward, so as to make the straight plate part of the outer mold 301 reach the extension position of the outer side surface of the box girder 400. Then the handle on the front vertical worm base 12 and the middle vertical worm base 32 is rotated in reverse to raise the sliding beam 1, so as to make the top of the outer mold 301 reach the height of the bottom of the flange 401 of the box girder 400. The front end of the sliding beam 1 is anchored with the front cross beam 3 by the finished rolled threaded steel 2. The rear end of the sliding beam 1 is anchored with the built box girder 400. Then the concrete pouring can be performed again.

[0117] The portable bridge builder disclosed by the utility model is provided with a front horizontal driving assembly 20 and a middle horizontal driving assembly 40 for driving the sliding beam 1 to move horizontally, can separate the straight plate part of the outer mold 301 from the outer side of the box girder 400 when the mold is opened, has small resistance when the mold plate moves forward and will not scratch the outer side of the box girder 400, the front beam body 700 and the middle beam body 600 are arranged as mounting platforms, the front vertical driving assembly 10 and the middle vertical driving assembly 30 for driving the sliding beam 1 to move up and down are all rigidly connected with the sliding beam 1, and the outer mold 301 runs stably during the forward movement of the mold plate and is not prone to shaking.

[0118] The curtain of the bridge builder in the prior art is a fixed truss structure.

[0119] The fixed curtain has the defects that the volume is large and transportation is inconvenient; when the bridge builder is used for bridge construction of different widths, the distance between the two groups of main trusses needs to be adjusted to adapt to the current bridge specifications, the width of the fixed curtain cannot be adjusted, the curtain can only be manufactured according to the distance between the main trusses required by different bridge specifications, and the curtain has poor versatility.

[0120] Please refer to Figures 15 to 17 In the embodiment, the portable bridge builder further comprises a folding curtain, the folding curtain comprises two groups of curtain bodies 500 arranged in mirror symmetry, and a connecting mechanism arranged between the two groups of curtain bodies 500, the connecting mechanism can adjust the distance between the two groups of curtain bodies 500, so that the width of the folding curtain is adjustable.

[0121] Each group of curtain bodies 500 comprises two lower cross beams 501 arranged in parallel and at intervals, and an upper cross beam 502 located between the two lower cross beams 501, a plurality of first connecting rods 503 are arranged between the upper cross beam 502 and the lower cross beams 501, and the first connecting rods 503 are hingedly connected with the lower cross beams 501 and the upper cross beam 502, so that the upper cross beam 502 can be folded and stored between the two lower cross beams 501.

[0122] Before the curtain body 500 is installed on the main truss 200, the connecting mechanism and the fixing rod 507 are removed, so that the upper cross beam 502 and the first connecting rod 503 can be folded and stored between the two lower cross beams 501, and the volume is small, facilitating transportation.

[0123] After the curtain body 500 is installed on the main truss 200, the distance between the two groups of curtain bodies 500 is adjusted through the connecting mechanism, so that the distance adjustment of the main truss 200 can be realized.

[0124] In the embodiment, the upper cross beam 502 of each group of curtain bodies 500 is provided with a fixing plate 504, and the connecting mechanism comprises a first screw rod 505 and a connecting plate 506.

[0125] The first screw rod 505 is arranged through the through hole on the fixed plate 504 and connected with the fixed plate 504 through a nut, so as to adjust the distance between the upper sides of the two groups of door curtain bodies 500 by the fixed position of the first screw rod 505 and the fixed plate 504. Specifically, the nut is threadedly connected with the first screw rod 505, and the fixed plate 504 is provided with a nut on each side, so as to fix the first screw rod 505 on the fixed plate 504. The fixed position of the first screw rod 505 and the fixed plate 504 can be adjusted by adjusting the position of the nut on the first screw rod 505, so as to adjust the distance between the upper sides of the two groups of door curtain bodies 500.

[0126] The connecting plate 506 is provided with a plurality of connecting holes 5061 at intervals, and the connecting plate 506 is connected with the lower cross beam 501 through bolts matched with the connecting holes 5061, so as to adjust the distance between the lower sides of the two groups of door curtain bodies 500 by selecting the connecting holes 5061. Specifically, the plurality of connecting holes 5061 are arranged at intervals in the length direction of the connecting plate 506. If it is intended to reduce the distance between the lower sides of the two groups of door curtain bodies 500, the connecting plate 506 is connected with the lower cross beam 501 through bolts selected from the connecting holes 5061 which are close to each other. Conversely, if it is intended to increase the distance between the lower sides of the two groups of door curtain bodies 500, the connecting plate 506 is connected with the lower cross beam 501 through bolts selected from the connecting holes 5061 which are far away from each other.

[0127] In other embodiments, the connecting plate 506 with a corresponding length can also be customized according to the required distance between the main trusses 200 of different bridge specifications, so as to adjust the distance between the lower sides of the door curtain bodies 500 by replacing the connecting plates 506 with different lengths, thereby achieving the distance adjustment of the main trusses 200. The connecting plate 506 is cheap and will not increase the cost too much.

[0128] In the embodiment, the door curtain body 500 further comprises a fixed rod 507, which forms a triangular structure with the first connecting rod 503 and the upper cross beam 502.

[0129] The fixed rod 507 is connected with the upper cross beam 502 and the lower cross beam 501 through bolts at both ends, and the structure of the door curtain body 500 is strengthened by the stability of the triangular structure.

[0130] In the embodiment, the door curtain body 500 further comprises a connecting head 508 for fixing the upper cross beam 502 on the vertical rod 201 of the main truss 200. The connecting head 508 comprises a large end for limiting and a small end for connecting with the upper cross beam 502. The small end is provided with a plurality of first pin holes 5081 at intervals, and the upper cross beam 502 is provided with a plurality of second pin holes 5021.

[0131] In the embodiment, the lower cross beam 501 is provided with a mounting hole 5011 for connecting with the main truss 200.

[0132] In the installation of the folding door curtain, the lower crossbeam 501 is fixed on the vertical rod 201 of the main truss 200 by bolts through the installation holes 5011, the small end of the connecting head 508 is passed through the through hole on the vertical rod 201 (the diameter of the large end of the connecting head 508 is larger than the through hole), the tubular end of the upper crossbeam 502 is sleeved with the small end of the connecting head 508, the connecting head 508 is connected with the upper crossbeam 502 by the positioning pin through the first pin hole 5081 and the second pin hole 5021, after the upper crossbeam 502, the lower crossbeam 501 and the vertical rod 201 are connected, the appropriate connecting hole 5061 on the connecting plate 506 is selected, the connecting plate 506, the lower crossbeam 501 and the lower end of the fixed rod 507 are hingedly connected by bolts, the upper end of the fixed rod 507 is connected with the upper crossbeam 502 by bolts, and the position of the nut on the first screw rod 505 is adjusted to pull the two groups of door curtain bodies 500 on the upper side.

[0133] The folding door curtain is composed of two groups of foldable door curtain bodies 500, has a small volume after the connecting mechanism is removed and the door curtain bodies 500 are folded, and is convenient for transportation, and meanwhile, the spacing adjustment of the main truss 200 can be realized by the connecting mechanism capable of adjusting the spacing of the door curtain bodies 500, and the folding door curtain has good universality.

[0134] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A portable bridge builder comprising a main truss, a travelling mechanism, characterized in that, The walking mechanism comprises a lifting oil cylinder, a walking wheel, a track beam and a front support, the first cylinder body of the lifting oil cylinder is fixedly connected with the main truss, the walking wheel is connected with the first piston rod of the lifting oil cylinder, the track beam is arranged below the walking wheel, and the front support is fixedly arranged at the bottom of the main truss.

2. The portable bridge erector according to claim 1, characterized in that The main truss comprises a telescopic beam, the telescopic beam comprises a bottom chord beam, an outer beam and an inner beam which are sequentially sleeved from outside to inside, and further comprises a telescopic oil cylinder located at the inner side of the inner beam, the front end of the second piston rod of the telescopic oil cylinder is fixedly connected with the bottom chord beam, the front end of the second cylinder body of the telescopic oil cylinder is fixedly connected with the outer beam, the rear end of the second cylinder body is provided with a pulley, a transmission cable is wound around the pulley, and the two ends of the transmission cable are fixedly connected with the front end of the bottom chord beam and the front end of the inner beam respectively. The second piston rod is provided with a joint portion for connecting an oil pipe near the front end, and the joint portion is in communication with the inside of the second cylinder body through a first oil hole and a second oil hole which are formed in the second piston rod.

3. The portable bridge builder of claim 1, wherein The anti-overturning mechanism of the reverse buckle wheel further comprises a rear pressing beam, the rear pressing beam is press-fitted at the rear part of the main truss, and the rear pressing beam is anchoringly connected with the built box girder through the fine rolled threaded steel. The opening and closing mold mechanism further comprises a sliding beam for bearing an outer mold, a front beam body and a middle beam body, the front beam body is arranged at both sides of the front cross beam, and the middle beam body is arranged at both sides of the door curtain. The front beam body comprises a front bow beam and a front mounting beam, the top of the front bow beam is fixedly connected with the front cross beam, the bottom of the front bow beam is connected with the front mounting beam, and the front mounting beam is horizontally arranged.

4. The portable bridge erector according to claim 3, characterized in that The middle beam body comprises a middle bow beam and a middle mounting beam, the top of the middle bow beam is fixedly connected with the door curtain, the bottom of the middle bow beam is connected with the middle mounting beam, and the middle mounting beam is horizontally arranged.

5. The portable bridge builder of claim 1, wherein, The front mounting beam is provided with a front vertical driving assembly, the front vertical driving assembly is hard-connected with the front end of the sliding beam, so as to drive the front end of the sliding beam to move in the vertical direction, and the front mounting beam is further provided with a front horizontal driving assembly, so as to drive the front vertical driving assembly to move with the front end of the sliding beam in the horizontal direction. The middle mounting beam is provided with a middle vertical driving assembly, the middle vertical driving assembly is hard-connected with the rear end of the sliding beam, so as to drive the rear end of the sliding beam to move in the vertical direction, and the middle mounting beam is further provided with a middle horizontal driving assembly, so as to drive the middle vertical driving assembly to move with the rear end of the sliding beam in the horizontal direction. ​ ​ ​ ​ 6. The portable bridge erector according to claim 5, characterized in that The front vertical drive assembly comprises a front sliding plate, a front vertical worm base and a front vertical worm, the front sliding plate is in sliding fit with the front mounting beam, the front vertical worm base is arranged on the front sliding plate, and the top of the front vertical worm is connected with the front end of the sliding beam; The front horizontal drive assembly comprises a front horizontal worm base, a front horizontal worm and a front abutting block, the front abutting block is fixedly connected with the front mounting beam, and the front horizontal worm base and the front horizontal worm are arranged between the front abutting block and the front sliding plate.

7. The portable bridge builder of claim 5 wherein, The middle vertical drive assembly comprises a middle sliding plate, a middle vertical worm base and a middle vertical worm, the middle sliding plate is in sliding fit with the middle mounting beam, the middle vertical worm base is arranged on the middle sliding plate, and the top of the middle vertical worm is connected with the rear end of the sliding beam; The middle horizontal drive assembly comprises a middle horizontal worm base, a middle horizontal worm and a middle abutting block, the middle abutting block is fixedly connected with the middle mounting beam, and the middle horizontal worm base and the middle horizontal worm are arranged between the middle abutting block and the middle sliding plate.

8. The portable bridge builder of claim 1, wherein, The folding door screen comprises two groups of door screen bodies arranged in mirror symmetry, and a connecting mechanism arranged between the two groups of door screen bodies, the connecting mechanism can adjust the spacing of the two groups of door screen bodies, so that the width of the folding door screen is adjustable. Each group of door screen bodies comprises two parallel and spaced lower cross beams and an upper cross beam arranged between the two lower cross beams, a plurality of first connecting rods are arranged between the upper cross beam and the lower cross beams, and the first connecting rods are hingedly connected with the lower cross beams and the upper cross beam, so that the upper cross beam can be folded and stored between the two lower cross beams.

9. The bridge erector of claim 8, wherein, The upper cross beams of the two groups of door screen bodies are provided with fixing plates, and the connecting mechanism comprises a first screw rod and a connecting plate. The first screw rod is arranged through the through hole of the fixing plate and connected with the fixing plate through a nut, so as to adjust the spacing of the upper sides of the two groups of door screen bodies through the fixed positions of the first screw rod and the fixing plate. A plurality of connecting holes are arranged on the connecting plate, the connecting plate is connected with the lower cross beams through bolts matched with the connecting holes, and the spacing of the lower sides of the two groups of door screen bodies is adjusted by selecting the connecting holes.

10. The portable bridge erector of claim 8, wherein The door screen body further comprises a connecting head for fixing the upper cross beam on the main truss upright rod, the connecting head comprises a large end for limiting and a small end for connecting with the upper cross beam, a plurality of first pin holes are arranged on the small end, and a plurality of second pin holes are arranged on the upper cross beam.

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