A bridge erecting machine for U-shaped beams and a hole-passing method thereof

Abstract

The present invention discloses a bridge erecting machine for U-shaped beams and a method for passing a hole therethrough, comprising: a main beam system, a leg system, and a crane system, wherein the leg system comprises a first leg, a second leg, a third leg, and a fourth leg, wherein the first leg, the second leg, and the third leg are sequentially spaced and distributed at intervals at the lower end of the main beam, and the first leg is located at the front end of the main beam, and the fourth leg is located at the rear end surface of the main beam. The bridge erecting machine for U-shaped beams and the method for passing a hole therethrough according to the present invention can adapt to U-shaped beams with smaller curves while avoiding occupying roads.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a bridge erecting machine for a U-shaped beam and a hole-passing method thereof. Background Art

[0002] In urban road construction, land acquisition and occupation of existing roads will affect construction costs and citizens' travel. Reducing land acquisition and occupation of existing roads in cities, reducing costs and facilitating citizens' travel are the goals that urban road construction constantly pursues.

[0003] In order to reduce the occupation of existing roads in the city and facilitate citizens' travel, a device is needed that can reduce land acquisition, reduce the occupation of existing roads and meet construction needs; at the same time, due to the special circumstances of the project location, it is restricted by the construction ground or the surrounding environment, and it is impossible to use ground transportation and suitable lifting equipment for bridge installation. The equipment is required to complete the U-beam erection without ground transportation and without being restricted by the lower space.

[0004] Conventional U-beam erection uses ground trailers for transportation and truck cranes or crawler cranes for on-site installation, which can no longer meet the above requirements.

[0005] Chinese patent CN102367651A discloses a U-shaped concrete beam bridge erecting machine, which has three outrigger structures. However, this bridge erecting machine is only suitable for U-shaped beams with larger line curves, and there are still many restrictions for U-shaped beams with smaller line curves. Summary of the invention

[0006] The present invention aims to provide a bridge erection machine for U-shaped beams and a hole-passing method thereof, so as to solve the problem that the existing bridge erection machine cannot be applied to U-shaped beams with smaller line curves.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A bridge erecting machine for U-shaped beams comprises a main beam system, a leg system and a crane system.

[0009] The leg system includes a first leg, a second leg, a third leg and a fourth leg, wherein the first leg, the second leg and the third leg are sequentially spaced and distributed at the lower end of the main beam, and the first leg is located at the front end of the main beam, and the fourth leg is located at the rear end surface of the main beam.

[0010] In some embodiments, the main beam system includes two main beams distributed at intervals, the main beam is a truss structure with an A-shaped cross-section, the main beam is divided into several sections, and the sections are connected by pins. The upper chord of the main beam is provided with a longitudinal track for the movement of the overhead crane.

[0011] In some embodiments, the first leg is provided with a first cross beam, the first cross beam is divided into an upper layer and a lower layer, the upper cross beam is connected to the main beam, the lower cross beam is rotatably connected to the upper cross beam, a first set of columns are hinged at both ends of the lower cross beam, and a first lifting cylinder is provided on the set of columns for driving the telescopic movement of the first set of columns.

[0012] In some embodiments, the second leg is supported on the lower chords of the two main beams through a roller box, the two roller boxes are connected by a universal joint, a turntable is connected to the lower end of the roller box, the turntable is used to adjust the angle between the second leg and the main beam, a second lifting cylinder and a second set of columns are provided at the lower end of the turntable, a transverse plate and a second cross beam are provided at the lower end of the second set of columns, a transverse mechanism is provided on the transverse plate, and a plurality of first columns are provided at the lower end of the second cross beam.

[0013] In some embodiments, the third leg has the same upper structure as the second leg, having a third set of columns, a third lifting cylinder and a third cross beam, a third column is provided below the third cross beam, a balancing beam is provided at the bottom end of the third column, and a ball joint seat is provided at the bottom end of the balancing beam.

[0014] In some embodiments, the top end of the fourth leg is hinged to the upper chord of the main beam, and the fourth leg is a sleeve column structure with four supporting points.

[0015] In some embodiments, the overhead crane system includes a front overhead crane and a rear overhead crane. The front overhead crane has the same structure as the rear overhead crane. The front overhead crane includes a longitudinal moving trolley and a transverse moving trolley. The longitudinal moving trolley is slidably matched with the longitudinal moving track of the upper chord of the main beam. The transverse moving trolley is arranged above the longitudinal moving trolley and slidably matched with the longitudinal moving trolley. The transverse moving trolley has two hanging points.

[0016] In some embodiments, the rear carriage is further provided with a balance wheel, and the balance wheel is arranged at the center of the two hanging points.

[0017] The through-hole method of the bridge erecting machine for U-beam includes:

[0018] In the first step, the front and rear carriages are moved above the third leg, supported by the second and third legs, and the first and fourth legs are free;

[0019] In the second step, the main beam moves forward, supported by the third leg, and the second leg moves horizontally to the inside of the curve. Then the second leg supports and the third leg moves horizontally to the outside of the curve.

[0020] In the third step, the main beam moves forward, the third leg supports, the second leg moves horizontally to the inside of the curve, then the second leg supports, the third leg moves horizontally to the outside of the curve, and the first leg is rotated to be parallel to the pier and supported on the pier.

[0021] Step 4: The fourth leg is supported on the bridge deck, the third leg is vacated, and the third leg is moved to the second leg to support the third leg;

[0022] Step 5: The second leg is emptied and moved to the first leg. The second leg is supported on the pier. The first and fourth legs are emptied. The front and rear cranes are moved to the second leg, and the main beam moves forward.

[0023] Step 6. Move the second and third legs horizontally so that the center of the second leg coincides with the center of the pier and the center of the third leg coincides with the center of the bridge, thus completing the through-hole.

[0024] The beneficial effects of the present invention are:

[0025] The bridge erection machine for U-shaped beams of the present invention can realize the erection of beams and equipment through-holes on a relatively small line curve by arranging a transverse movement mechanism and a rotating disk on the legs, which is suitable for the characteristics of small curves and large longitudinal slopes of urban rail transit lines. The equipment can be turned around by exchanging the first leg and the fourth leg, and the second leg and the third leg, without the need for other external equipment, saving construction time, and reducing the cost of disassembly and assembly, meeting the working conditions of special situations.

[0026] 1. The double lifting points of the front crane and the single lifting point of the rear crane are coordinated to achieve "four-point lifting and three-point balance" so that the U-shaped beam is not damaged by external additional force during lifting. Through the movement of the longitudinal trolley and the transverse trolley, the lifted U-shaped beam can be transported to the beam erection site, the U-shaped beam can be dropped and the erection of the U-shaped beam can be completed.

[0027] 2. Since the main beam 1 is symmetrically distributed in the front and rear and left and right directions, remove the first leg and install it at the corresponding position of the rear end, and remove the fourth leg and install it at the corresponding position of the front end. Then support the first leg 2 and the fourth leg 5, and replace the second leg 3 and the third leg 4 to realize the front and rear exchange of the bridge erection machine and realize the reverse erection.

[0028] 3. The second leg and the third leg are connected to the main beam through the roller box, and the distance between the second leg and the third leg can be changed to adapt to bridges with different spans. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a bridge erecting machine for a U-shaped beam according to an embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of a first leg according to an embodiment of the present invention;

[0031] Figure 3 is a schematic diagram of a second leg according to an embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of a third leg according to an embodiment of the present invention;

[0033] Figure 5 is a schematic diagram of a fourth leg according to an embodiment of the present invention;

[0034] Figure 6 A schematic diagram of a front crane according to an embodiment of the present invention;

[0035] Figure 7 A schematic diagram of a post-day vehicle according to an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the first step of the via method according to an embodiment of the present invention;

[0037] Fig. 9 It is a schematic diagram of the second step of the via method according to an embodiment of the present invention;

[0038] Fig.10 This is a schematic diagram of the third step of the via method according to an embodiment of the present invention;

[0039] Fig.11 It is a schematic diagram of the fifth step of the via method according to an embodiment of the present invention;

[0040] Fig.12 It is a schematic diagram of the sixth step of the via method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with the accompanying drawings.

[0042] The bridge erecting machine for U-shaped beams according to the embodiment of the present invention comprises: a main beam system, a leg system, and a crane system.

[0043] Specifically, Figure 1 As shown, the main beam system has two main beams 1 distributed at intervals. The main beam 1 is a truss structure with an A-shaped cross-section. The main beam 1 is divided into several sections, and the sections are connected by pins. The upper chord and the lower chord of the main beam 1 are both I-shaped structures, and the web is a rectangular profile. The upper chord of the main beam 1 is provided with a track distributed along the longitudinal direction. The main beam 1 is symmetrically distributed in the front and rear directions and the left and right directions. The leg system includes a first leg 2, a second leg 3, a third leg 4 and a fourth leg 5. The first leg 2, the second leg 3, and the third leg 4 are distributed at intervals in sequence at the lower end of the main beam 1, and the first leg 2 is located below the front end of the main beam 1, and the fourth leg 5 is located on the rear end surface of the main beam 1.

[0044] like Figure 2As shown, the first leg 1 is provided with a first crossbeam, which is divided into two layers, the upper crossbeam 11 is fixedly connected to the main beam, and the upper crossbeam 11 is rotatably connected to the lower crossbeam 12 via a rotating shaft, and the lower crossbeam 12 can rotate in the horizontal direction around the rotating shaft. The two ends of the lower crossbeam 12 are respectively provided with a first set of columns 13, and the first set of columns 13 are provided with a first lifting cylinder, which is used to drive the first set of columns to telescope.

[0045] like Figure 3 As shown, the second leg 2 is supported on the lower chord of the main beam 1 through a roller wheel box. The second leg 2 is slidably matched with the main beam 1. A turntable 21 is provided at the lower end of the roller wheel box. The turntable 21 can be rotated in the horizontal direction. The turntable is used to adjust the angle between the second leg 2 and the main beam 1 in the horizontal plane. The lower end of the turntable 21 is connected to a second set of columns 22 and a second lifting cylinder. The lower end of the second set of columns is provided with a transverse plate 23. A transverse mechanism 24 is provided on the transverse plate. The two transverse plates are connected by a connecting support. The transverse mechanism 24 is a transverse cylinder. A second crossbeam 25 is provided below the transverse plate, and four first columns 26 are provided at the lower end of the second crossbeam.

[0046] like Figure 4 As shown, the upper structure of the third leg 4 is the same as that of the second leg 2, and has a turntable, a third set of columns 31, a third lifting cylinder, a transverse plate and a third crossbeam 32 of the same structure. The difference is that four second columns 33 are arranged below the third crossbeam, and each second column is provided with a balance beam 34 at the bottom end, and each balance beam is provided with two ball joint seats at the bottom end. The main beam 1 can be driven forward or backward by the roller box connected to the main beam 1 by the second leg 3 and the third leg 4 respectively. The supporting position of the second leg 3 and the third leg 4 on the lower chord of the main beam 1 can also be changed by the roller box to adapt to bridges of different spans.

[0047] like Figure 5 As shown, the fourth leg 5 is a sleeve column structure with a telescopic function, and the top end of the fourth leg 5 is rotatably connected to the rear end surface of the main beam 1 through a rotating shaft, and the fourth leg 5 can rotate around the rotating shaft.

[0048] like Figure 6 , 7As shown, the overhead crane system includes a front overhead crane 6 and a rear overhead crane 7. The front overhead crane has the same structure as the rear overhead crane. The front overhead crane includes a longitudinal moving trolley 61 and a transverse moving trolley 62. The bottom end of the longitudinal moving trolley 61 slides with the track of the upper chord of the main beam 1 and can move in the longitudinal direction. The bottom end of the transverse moving trolley 62 slides with the top end of the longitudinal moving trolley 61, and the transverse moving trolley 62 can move in the transverse direction. The transverse moving trolley 62 is provided with two hanging points, and the two hanging points are symmetrically distributed. The two hanging points are respectively provided with steel wire ropes, which can respectively realize the lifting or lowering function. Compared with the front overhead crane, the rear overhead crane is also provided with a balancing wheel 8. The balancing wheel 8 is provided at the center of the two hanging points, and the balancing wheel 8 is connected to the two hanging points by a steel wire rope, so that the rear overhead crane has only one hanging point.

[0049] According to the bridge erection machine for U-shaped beams of the embodiment of the present invention, when erecting beams, the third straight leg 4 stands on the beam-erected surface or roadbed, the second leg 3 stands on the bridge pier, and the U-shaped beam is transported to the tail of the bridge erection machine by the beam transport vehicle, and then the U-shaped beam is lifted by the cooperation between the front trolley 6 and the rear trolley 7 and the beam transport vehicle. The beam transport vehicle is divided into a front beam transport vehicle and a rear beam transport vehicle. The U-shaped beam is placed on the crossbeams of the front and rear beam transport vehicles, and the crossbeam of the front beam transport vehicle has two support points and can rotate horizontally. A rotation and swing fulcrum is provided in the middle of the crossbeam of the rear beam transport vehicle, so that the crossbeam of the rear beam transport vehicle can rotate horizontally and swing, thereby realizing the curved transportation of the U-shaped beam, satisfying the "four-point support, three-point balance", and preventing the beam body from being affected by external torque and causing damage. The double lifting points of the front trolley 6 and the single lifting point of the rear trolley 7 cooperate to achieve "four-point lifting, three-point balance" so that the U-shaped beam is not damaged by external additional force couples during lifting. By moving the longitudinal trolley and the transverse trolley, the lifted U-beam can be transported to the beam erection site, the U-beam can be dropped and the erection of the U-beam can be completed.

[0050] The bridge erecting machine for U-shaped beams of the present invention also has a reverse erection function. When reverse erection is required, the second leg 3 and the third leg 4 are supported first. Since the main beam 1 is symmetrically distributed in the front and rear directions and the left and right directions, the first leg is removed and installed at the corresponding position of the rear end, and the fourth leg is removed and installed at the corresponding position of the front end. Then the first leg 2 and the fourth leg 5 are supported, and the second leg 3 and the third leg 4 are installed in a transposed manner, so that the bridge erecting machine is swapped front and back and reverse erection is achieved.

[0051] The method for passing a hole in a bridge erecting machine for a U-shaped beam according to an embodiment of the present invention is as follows:

[0052] In the first step, the front trolley 6 and the rear trolley 7 are moved above the third leg 4, the second leg 3 and the third leg 4 are supported, and the first leg 2 and the fourth leg 5 are free;

[0053] In the second step, the main beam 1 moves forward, supported by the third leg 4, and the second leg 3 moves laterally to the inside of the curve, and then the second leg 3 supports and the third leg 4 moves laterally to the outside of the curve;

[0054] In the third step, the main beam 1 moves forward, the third leg 4 supports, the second leg 3 moves horizontally to the inside of the curve, then the second leg 3 supports, the third leg 4 moves horizontally to the outside of the curve, and the first leg 2 is rotated until the lower beam 12 is parallel to the pier and supported on the pier

[0055] Step 4: The fourth leg 5 is supported on the bridge deck, the third leg 4 is vacated, and the third leg 4 is moved to the second leg 3 to support the third leg 4;

[0056] Step 5: The second leg 3 is emptied and moved to the first leg 2. The second leg 3 is supported on the pier. The first leg 2 and the fourth leg 5 are emptied. The front crane 6 and the rear crane 7 are moved to the second leg 3. The main beam 1 moves forward.

[0057] The sixth step is to move the second leg 3 and the third leg 4 horizontally so that the center of the second leg 3 coincides with the center of the pier, and the center of the third leg 4 coincides with the center of the bridge, thus completing the through-hole.

[0058] According to the method for passing a hole of a bridge erecting machine for a U-shaped beam of the present invention, by moving forward twice and adjusting the second leg 3 and the third leg 4 laterally three times, a U-beam passing hole with a smaller curve and a larger longitudinal slope can be achieved.

[0059] This embodiment does not impose any formal limitation on the shape, material, structure, etc. of the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0060] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0061] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but 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 invention.

Claims

1. A bridge erecting machine for U-shaped beams, comprising: Main beam system, outrigger system, overhead crane system; Characterized in that the outrigger system comprises a first outrigger, a second outrigger, a third outrigger and a fourth outrigger, wherein the first outrigger, the second outrigger and the third outrigger are sequentially spaced and distributed at the lower end of the main beam, and the first outrigger is located at the front end of the main beam, and the fourth outrigger is located at the rear end surface of the main beam; The second leg is supported on the lower chords of the two main beams through a roller box, and the two roller boxes are connected by a universal joint. A turntable is connected to the lower end of the roller box, and the turntable is used to adjust the angle between the second leg and the main beam. A second lifting cylinder and a second set of columns are provided at the lower end of the turntable, and a transverse plate and a second cross beam are provided at the lower end of the second set of columns. A transverse mechanism is provided on the transverse plate, and a plurality of columns are provided at the lower end of the second cross beam.

2. The bridge erecting machine for U-shaped beams according to claim 1, characterized in that: The main beam system includes two main beams distributed at intervals. The main beam is a truss structure with an A-shaped cross-section. The main beam is divided into several sections, and the sections are connected by pins. The upper chord of the main beam is provided with a longitudinal track for the movement of the overhead crane.

3. The bridge erecting machine for U-shaped beams according to claim 1, characterized in that: The first leg is provided with a first crossbeam, and the first crossbeam is divided into an upper layer and a lower layer. The upper crossbeam is connected to the main beam, and the lower crossbeam is rotatably connected to the upper crossbeam. First sets of columns are hinged at both ends of the lower crossbeam, and a first lifting cylinder is provided on the set of columns for driving the telescopic movement of the first set of columns.

4. The bridge erecting machine for U-shaped beams according to claim 1, characterized in that: The third leg has the same upper structure as the second leg, and comprises a third set of columns, a third lifting cylinder and a third cross beam. A third column is arranged below the third cross beam, a balance beam is arranged at the bottom end of the third column, and a ball joint seat is arranged at the bottom end of the balance beam.

5. The bridge erecting machine for U-shaped beams according to claim 1, characterized in that: The top end of the fourth leg is hinged to the upper chord of the main beam, and the fourth leg is a sleeve column structure with four supporting points.

6. The bridge erecting machine for U-shaped beams according to any one of claims 1 to 5, characterized in that: The overhead crane system includes a front overhead crane and a rear overhead crane. The front overhead crane has the same structure as the rear overhead crane. The front overhead crane includes a longitudinal moving trolley and a transverse moving trolley. The longitudinal moving trolley is slidably matched with the longitudinal moving track of the upper chord of the main beam. The transverse moving trolley is arranged above the longitudinal moving trolley and slidably matched with the longitudinal moving trolley. The transverse moving trolley has two hanging points.

7. The bridge erecting machine for U-shaped beams according to claim 6, characterized in that: The rear carriage is also provided with a balancing wheel, and the balancing wheel is arranged at the center of the two hanging points.

8. The hole-passing method for a U-beam bridge erecting machine according to claim 7, characterized in that: In the first step, the front and rear carriages are moved above the third leg, supported by the second and third legs, and the first and fourth legs are free; In the second step, the main beam moves forward, supported by the third leg, and the second leg moves horizontally to the inside of the curve. Then the second leg supports and the third leg moves horizontally to the outside of the curve. In the third step, the main beam moves forward, the third leg supports, the second leg moves horizontally to the inside of the curve, then the second leg supports, the third leg moves horizontally to the outside of the curve, and the first leg is rotated to be parallel to the pier and supported on the pier. Step 4: The fourth leg is supported on the bridge deck, the third leg is vacated, and the third leg is moved to the second leg to support the third leg; Step 5: The second leg is emptied and moved to the first leg. The second leg is supported on the pier. The first and fourth legs are emptied. The front and rear cranes are moved to the second leg, and the main beam moves forward. Step 6. Move the second and third legs horizontally so that the center of the second leg coincides with the center of the pier and the center of the third leg coincides with the center of the bridge, thus completing the through-hole.

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