Prefabricated bridge pier erection device, erection method and obstacle-passing method

Abstract

The present invention provides a prefabricated bridge pier erection device, an erection method and an obstacle-passing method. The prefabricated bridge pier erection device includes: a frame beam assembly, which includes a cross beam and a main beam arranged on the cross beam; a support mechanism, which is arranged at the bottom of the cross beam and is used to support the frame beam assembly; a lifting mechanism, which is arranged at the top of the main beam and is used to lift the prefabricated bridge pier to be assembled; a running mechanism, which is arranged at the bottom of the support mechanism and is used to drive the support mechanism to move; a telescopic mechanism, which includes a first telescopic component arranged on the support mechanism and is used to drive the support mechanism to telescope; a folding mechanism, which is arranged on the support mechanism and is used to drive the support mechanism to fold upward; the support mechanism includes a front leg assembly, a middle leg assembly and a rear leg assembly arranged in sequence, and the front leg assembly and the rear leg assembly are both hinged to the cross beam, and the middle leg assembly is slidably connected to the cross beam. The erection device of the present invention effectively improves the efficiency of the prefabricated bridge pier assembly process.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated bridge pier installation equipment, and in particular to a prefabricated bridge pier erection device, an erection method and an obstacle-passing method. Background Art

[0002] The installation of traditional prefabricated bridge piers is restricted by the terrain, especially the construction of highway or overpass piers in urban areas, which are often restricted by surrounding buildings, roads, antennas, etc. There is currently no dedicated equipment, and conventional gantry crane equipment is also not feasible due to terrain restrictions. Currently, the main method used for installation is to lift with a truck crane or crawler crane.

[0003] However, before using a truck crane or crawler crane to assemble prefabricated bridge piers, the truck crane or crawler crane needs to be positioned correctly in advance, and preparatory work such as adding counterweights is required. The preparatory work is relatively large and requires a large number of construction personnel. Moreover, after the installation is completed, a series of finishing work is required and the crane needs to move to the next pier. The whole process progresses relatively slowly, resulting in a longer construction period for the entire project. In addition, the lifting of crawler cranes or truck cranes is prone to tipping accidents, and the risk of overturning is relatively high. Summary of the invention

[0004] The problem solved by the invention is: how to improve the efficiency of erecting prefabricated bridge piers to shorten the project construction period.

[0005] In order to solve the above problems, the present invention provides a prefabricated pier erection device, comprising:

[0006] A frame beam assembly, comprising a cross beam and a main beam arranged on the cross beam;

[0007] A supporting mechanism, which is arranged at the bottom of the crossbeam and is used to support the frame beam assembly;

[0008] A lifting mechanism, which is arranged on the top of the main beam and is used to lift the prefabricated piers to be assembled;

[0009] A running mechanism, which is arranged at the bottom of the supporting mechanism and is used to drive the supporting mechanism to move;

[0010] A telescopic mechanism, comprising a first telescopic assembly disposed on the support mechanism, and used for driving the support mechanism to telescope;

[0011] A folding mechanism, which is arranged on the supporting mechanism and is used to drive the supporting mechanism to fold upwards;

[0012] The support mechanism comprises a front leg assembly, a middle leg assembly and a rear leg assembly which are arranged in sequence, and the front leg assembly and the rear leg assembly are both hinged to the cross beam, and the middle leg assembly is slidably connected to the cross beam.

[0013] Optionally, the folding mechanism is provided on both sides of the front leg assembly and the rear leg assembly in the length direction of the main beam; and one end of the folding mechanism on the front leg assembly and the rear leg assembly is fixed to the cross beam, and the other end is respectively fixed to the front leg assembly and the rear leg assembly.

[0014] Optionally, the middle leg assembly includes a connecting segment and a supporting segment, one end of the connecting segment is slidably connected to the cross beam, and the other end of the connecting segment is hinged to the supporting segment; and one end of the folding mechanism on the middle leg assembly is fixed to the connecting segment, and the other end is fixed to the supporting segment.

[0015] Optionally, the support mechanism further includes a sliding assembly, and the connecting segment and the crossbeam are slidably connected via the sliding assembly.

[0016] Optionally, the support mechanism also includes an upper hinge seat, a lower hinge seat and a pin shaft, the lower hinge seat is fixed to the front support leg assembly and the rear support leg assembly, the upper hinge seat is fixed at a position on the cross beam corresponding to the lower hinge seat, and the upper hinge seat and the lower hinge seat are hinged through the pin shaft.

[0017] Optionally, two crossbeams are provided, and the front leg assemblies on the two crossbeams have a spacing in the length direction of the crossbeam, and the rear leg assemblies on the two crossbeams also have a spacing in the length direction of the crossbeam.

[0018] Optionally, the lifting mechanism includes a winch, a lifting trolley, a sling and a transverse cylinder, the winch is fixed to both ends of the main beam, the sling is fixed to the lifting trolley, one end of the transverse cylinder is fixed to the main beam, and the other end of the transverse cylinder is fixed to the lifting trolley.

[0019] Optionally, the telescopic mechanism further comprises a second telescopic assembly disposed on the crossbeam, for adjusting the length of the crossbeam.

[0020] Optionally, the crossbeam is a box beam structure, and the second telescopic assembly is arranged in a cavity of the crossbeam.

[0021] Optionally, the running mechanism is suitable for 360° rotation relative to the front leg assembly, the middle leg assembly or the rear leg assembly.

[0022] In order to solve the above problems, the present invention further provides a method for erecting prefabricated bridge piers, using the above-mentioned prefabricated bridge pier erection device, comprising:

[0023] Step 1, the prefabricated pier erection device is moved to the pier platform, a transport vehicle transports a pier column and enters below the prefabricated pier erection device, the prefabricated pier erection device lifts the pier column, the transport vehicle exits the prefabricated pier erection device, and the pier column is vertically installed on the pier platform through the retracting and extending action of the prefabricated pier erection device;

[0024] Step 2, the prefabricated pier erection device is moved horizontally to one side of the pier platform, the transport vehicle transports the pier cap beam to enter the bottom of the prefabricated pier erection device, the prefabricated pier erection device lifts the pier cap beam, the transport vehicle exits the prefabricated pier erection device, and the prefabricated pier erection device is moved horizontally to the top of the pier column to assemble the pier cap beam with the pier column;

[0025] Step 3, the prefabricated pier erection device is moved horizontally to one side of the pier platform, the transport vehicle transports the pier end beam to enter under the prefabricated pier erection device, the prefabricated pier erection device lifts the pier end beam, the transport vehicle exits the prefabricated pier erection device, and the prefabricated pier erection device is moved horizontally to the end of the pier cap beam to assemble the pier end beam with the pier cap beam;

[0026] Step 4. Repeat step 3 to complete the assembly of the other pier end beam.

[0027] Optionally, after step 4, the method further includes:

[0028] Step 5, after the prefabricated piers are assembled, the middle leg assembly of the prefabricated pier erection device moves toward the rear leg assembly of the prefabricated pier erection device to a preset position and is supported on the ground, the rear leg assembly is flipped upward, and after the prefabricated pier erection device moves forward until the rear leg assembly passes over the assembled prefabricated piers, the rear leg assembly is folded downward, and at the same time, the middle leg assembly is retracted off the ground, and the front leg assembly and the rear leg assembly of the prefabricated pier erection device are supported on the ground.

[0029] In order to solve the above problems, the present invention further provides a method for passing obstacles of prefabricated bridge piers, which adopts the above-mentioned prefabricated bridge pier erection device, comprising:

[0030] Step a, when the prefabricated pier erection device moves forward until the distance between the front leg assembly of the prefabricated pier erection device and the obstacle reaches a preset distance, the middle leg assembly of the prefabricated pier erection device moves forward to the front support position;

[0031] Step b, the middle leg assembly extends downward until it is supported on the ground, the front leg assembly retracts, and the running mechanism on the front leg assembly rotates 90 degrees;

[0032] Step c, the front leg assembly is folded upward, and the prefabricated pier erection device moves forward until the front leg assembly passes over the obstacle;

[0033] Step d, the front leg assembly is folded downward, and after the running mechanism on the front leg assembly rotates 90 degrees, the front leg assembly extends downward to support the ground, and at the same time, after one of the two middle leg assemblies moves backward to the rear support position, the two middle leg assemblies are retracted, and the running mechanism on the middle leg assembly rotates 90 degrees;

[0034] Step e, the middle leg assembly is folded upward, and when the prefabricated pier erection device moves forward until the distance between the rear leg assembly of the prefabricated pier erection device and the obstacle reaches the preset distance, the middle leg assembly is folded downward, and at the same time, the other of the two middle leg assemblies moves to the rear support position;

[0035] Step f, after the running mechanism on the middle leg assembly rotates 90 degrees, the middle leg assembly is supported on the ground, and at the same time, the rear leg assembly retracts, and the running mechanism on the rear leg assembly rotates 90 degrees;

[0036] Step g, the rear leg assembly is folded upward, and after the prefabricated pier erection device moves forward until the rear leg assembly passes over the obstacle, the rear leg assembly is folded downward;

[0037] Step h: the running mechanism on the rear leg assembly rotates 90 degrees, the rear leg assembly extends downward to be supported on the ground, and the middle leg assembly retracts.

[0038] Compared with the prior art, the present invention has the following beneficial effects: the erection device of the present invention can be used as a special equipment for assembling prefabricated bridge piers, the prefabricated bridge piers to be assembled are lifted by the lifting mechanism, and the erection device is driven by the traveling mechanism to move horizontally or vertically at the prefabricated bridge pier assembly site, so as to move the prefabricated bridge piers to be assembled to the pier platform for assembly operation. Compared with the prior art of assembling prefabricated bridge piers by using crawler cranes or truck cranes, the erection device of the present invention does not need to be positioned in advance, nor does it need to add counterweights and other preparatory work; moreover, after the prefabricated bridge piers are assembled, there is less work at the beginning and end, and at the same time, the erection device can be quickly moved to the next bridge pier to be assembled, which effectively improves the efficiency of the entire assembly process, thereby effectively shortening the construction period of the entire project; in addition, the support mechanism of the erection device has a telescopic function, so that the erection device can not only adapt to the needs of uneven terrain, but also adapt to the erection needs of high bridge piers. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of a prefabricated bridge pier erection device in an embodiment of the present invention;

[0040] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0041] Figure 3 It is a structural schematic diagram of the prefabricated bridge pier erection device from another perspective in an embodiment of the present invention;

[0042] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0043] Figure 5 It is a structural schematic diagram of another situation of the erection device of the prefabricated bridge pier in the embodiment of the present invention;

[0044] Figure 6 (a) and Figure 6 (b) is a schematic diagram of the state of the erection device of the prefabricated pier in the erection method according to the embodiment of the present invention before the pier assembly work is performed;

[0045] Figure 7 (a) and Figure 7 (b) is a schematic diagram of the structure corresponding to step 1.1 in the installation method in an embodiment of the present invention;

[0046] Figure 8 (a) and Figure 8 (b) is a schematic diagram of the structure corresponding to step 1.2 in the installation method in an embodiment of the present invention;

[0047] Fig. 9 (a) and Fig. 9(b) is a schematic diagram of the structure corresponding to step 2.1 in the installation method in an embodiment of the present invention;

[0048] Fig.10 (a) and Fig.10 (b) is a schematic diagram of the structure corresponding to step 2.2 in the installation method in an embodiment of the present invention;

[0049] Fig.11 (a) and Fig.11 (b) is a schematic diagram of the structure corresponding to step 2.3 in the installation method in an embodiment of the present invention;

[0050] Fig.12 (a) and Fig.12 (b) is a schematic diagram of the structure corresponding to step 3.1 in the installation method in an embodiment of the present invention;

[0051] Fig.13 (a) and Fig.13 (b) is a schematic diagram of the structure corresponding to step 3.2 in the installation method in an embodiment of the present invention;

[0052] Fig.14 (a) and Fig.14 (b) is a schematic diagram of the structure corresponding to step 4.1 in the installation method in an embodiment of the present invention;

[0053] Fig.15 (a) and Fig.15 (b) is a schematic diagram of the structure corresponding to step 4.2 in the erection method in an embodiment of the present invention;

[0054] Fig.16 (a) and Fig.16 (b) is a schematic diagram of the structure corresponding to step 5.1 in the installation method in an embodiment of the present invention;

[0055] Fig.17 (a) and Fig.17 (b) is a schematic diagram of the structure corresponding to step 5.2 in the installation method in an embodiment of the present invention;

[0056] Fig.18 (a) and Fig.18 (b) is a schematic diagram of the structure corresponding to step 5.3 in the installation method in an embodiment of the present invention;

[0057] Fig.19 (a) and Fig.19 (b) is a schematic diagram of the structure corresponding to step 5.4 in the installation method in an embodiment of the present invention;

[0058] Fig. 20 (a) and Fig. 20 (b) is a schematic diagram of the structure corresponding to step 5.5 in the installation method in an embodiment of the present invention;

[0059] Fig.21 (a) and Fig.21 (b) is a schematic diagram of the structure corresponding to step a in the obstacle passing method according to an embodiment of the present invention;

[0060] Fig. 22 (a) and Fig. 22 (b) is a schematic diagram of the structure corresponding to step b in the obstacle passing method in an embodiment of the present invention;

[0061] Fig.23 (a) and Fig.23 (b) is a schematic diagram of the structure of the front leg assembly when it is turned up in step c of the obstacle crossing method in an embodiment of the present invention;

[0062] Fig.24 (a) and Fig.24 (b) is a schematic diagram of the structure when the front leg assembly passes over the obstacle and moves forward to a certain distance between the middle leg assembly and the obstacle in step c of the method for passing over the obstacle in an embodiment of the present invention;

[0063] Fig.25 (a) and Fig.25 (b) is a schematic diagram of the structure corresponding to step d in the obstacle passing method in an embodiment of the present invention;

[0064] Fig.26 (a) and Fig.26 (b) is a schematic diagram of the structure of the middle leg assembly when it is turned up in step e of the method for passing an obstacle in an embodiment of the present invention;

[0065] Fig. 27 (a) and Fig. 27 (b) is a schematic diagram of the structure when the erection device in step e of the obstacle-passing method in an embodiment of the present invention moves forward to a point where the rear leg assembly is a certain distance away from the obstacle;

[0066] Fig.28 (a) and Fig.28 (b) is a schematic diagram of the structure of the middle leg assembly when it is folded down in step e of the method for passing an obstacle in an embodiment of the present invention;

[0067] Fig.29 (a) and Fig.29 (b) is a schematic diagram of the structure corresponding to step f in the obstacle passing method in an embodiment of the present invention;

[0068] Fig.30 (a) and Fig.30 (b) is a schematic diagram of the structure of the rear leg assembly when it is turned up in step g of the method for passing an obstacle in an embodiment of the present invention;

[0069] Fig.31 (a) and Fig.31(b) is a schematic diagram of the structure when the erection device in step g of the obstacle-passing method according to an embodiment of the present invention is moved forward to a point where the rear leg assembly is a certain distance away from the obstacle;

[0070] Fig.32 (a) and Fig.32 (b) is a schematic diagram of the structure of the rear leg assembly when it is folded down in step g of the method for passing an obstacle in an embodiment of the present invention;

[0071] Fig.33 (a) and Fig.33 (b) is a schematic diagram of the structure corresponding to step h in the obstacle passing method in an embodiment of the present invention.

[0072] Description of reference numerals:

[0073] 1-frame beam assembly, 11-main beam, 12-cross beam; 21-front outrigger assembly, 22-rear outrigger assembly, 23-middle outrigger assembly, 231-connecting segment, 232-support segment, 24-sliding assembly, 25-upper hinge seat, 26-lower hinge seat, 27-pin shaft; 3-lifting mechanism, 31-winch, 32-lifting trolley, 33-sling, 34-transverse cylinder; 4-travelling mechanism, 41-frame, 42-wheel set; 51-first telescopic assembly, 52-second telescopic assembly; 6-pier; 7-pier column; 8-pier cap beam, 9-pier end beam. DETAILED DESCRIPTION

[0074] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0075] It should be noted that, in the coordinate system XYZ provided herein, the positive direction of the X axis represents the front, the reverse direction of the X axis represents the rear, the positive direction of the Y axis represents the right, the reverse direction of the Y axis represents the left, the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom. At the same time, it should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0076] Combination Figure 1 and Figure 3As shown, an embodiment of the present invention provides a prefabricated pier erection device, including: a frame beam assembly 1, which includes a cross beam 12 and a main beam 11 arranged on the cross beam 12; a support mechanism, which is arranged at the bottom of the cross beam 12 and is used to support the frame beam assembly 1; a lifting mechanism 3, which is arranged at the top of the main beam 11 and is used to lift the prefabricated piers to be assembled; a running mechanism 4, which is arranged at the bottom of the support mechanism and is used to drive the support mechanism to move; a telescopic mechanism, which includes a first telescopic component 51 arranged on the support mechanism and is used to drive the support mechanism to telescope; a folding mechanism (not shown in the figure), which is arranged on the support mechanism and is used to drive the support mechanism to fold upward; the support mechanism includes a front leg assembly 21, a middle leg assembly 23 and a rear leg assembly 22, which are arranged in sequence, and the front leg assembly 21 and the rear leg assembly 22 are both hinged to the cross beam 12, and the middle leg assembly 23 is slidably connected to the cross beam 12.

[0077] In this embodiment, the movement of the prefabricated pier erection device (hereinafter referred to as the erection device) during the assembly of the prefabricated piers can be manually controlled or machine controlled. For example, by setting a control mechanism, and electrically connecting the lifting mechanism 3, the running mechanism 4, the telescopic mechanism and the folding mechanism to the control mechanism, the control mechanism is used to control the movement of the erection device during the assembly of the prefabricated piers to improve the degree of automation. The frame beam assembly 1 is a double-main-beam frame structure, that is, two main beams 11 are provided to increase the structural strength and improve the stability of the erection device during operation. A running mechanism 4 is provided at the bottom of each front leg assembly 21, middle leg assembly 23 and rear leg assembly 22, and the support mechanism is driven to move by the running mechanism 4. The frame beam assembly 1 is arranged on the top of the support mechanism, so that the running mechanism 4 can drive the erection device to move horizontally or vertically at the prefabricated pier assembly site to move the prefabricated pier assembly to the pier for assembly operation; wherein, horizontal movement refers to the movement along the length direction of the main beam 11 (i.e. Figure 1 The longitudinal movement refers to the movement along the length direction of the beam 12 (i.e. Figure 3 The middle outrigger assembly 23 can slide along the bottom of the crossbeam 12. Since the terrain of the prefabricated bridge pier assembly site is relatively complex, there are usually uneven places in the front, back, left and right directions. The erection device in this embodiment is provided with a first telescopic component 51 on the front outrigger assembly 21, the middle outrigger assembly 23 and the rear outrigger assembly 22, so that the front outrigger assembly 21, the middle outrigger assembly 23 and the rear outrigger assembly 22 have a telescopic function, so that the erection device can also ensure the stability when hoisting the prefabricated bridge piers at the construction site with uneven terrain, so that the erection device can better adapt to the requirements of the terrain; moreover, the front outrigger assembly 21 and the rear outrigger assembly 22 can be raised to meet the erection requirements of high bridge piers; in addition, during the operation, the center of gravity of the erection device can be lowered by lowering the overall height of the erection device, so that the erection device is more stable and the operation speed is also faster.

[0078] The erection device of the present embodiment can be used as a special equipment for assembling prefabricated bridge piers. The prefabricated bridge pier to be assembled is lifted by the lifting mechanism 3, and the erection device is driven by the traveling mechanism 4 to move horizontally or vertically at the prefabricated bridge pier assembly site, so as to move the prefabricated bridge pier to be assembled to the pier platform for assembly operation. Compared with the prior art of assembling prefabricated bridge piers by using crawler cranes or automobile cranes, the erection device of the present embodiment does not need to be positioned in advance, nor does it need to add counterweights and other preparatory work. Moreover, after the prefabricated bridge piers are assembled, less work is done at the beginning and end. In addition, the support mechanism of the erection device has a telescopic function, so that the erection device can not only adapt to the needs of uneven terrain, but also adapt to the erection needs of high bridge piers. Moreover, by providing a middle support leg assembly 23 that can slide along the crossbeam 12 On the one hand, it can share the weight supported by the front leg assembly 21 and the rear leg assembly 22 in the supporting mechanism to improve the carrying capacity of the erection device and the stability during operation, and can also adjust the support position by sliding back and forth to meet different usage requirements; on the other hand, when the rear leg assembly 22 of the erection device needs to pass over the assembled prefabricated pier, the middle leg assembly 23 can move backward to the vicinity of the rear leg assembly 22, so that when the rear leg assembly 22 is folded upward, it can replace the rear leg assembly 22 to provide support for the rear end of the erection device, so that the rear leg assembly 22 can smoothly pass over the assembled prefabricated pier, so that the erection device can move quickly to the next pier to be assembled, effectively improving the efficiency of the entire assembly process, thereby effectively shortening the construction period of the entire project.

[0079] Further, the frame beam assembly 1 includes two parallel main beams 11 and two parallel cross beams 12, and the two cross beams 12 are respectively located at the two ends of the bottom of the main beam 11. Specifically, the main beam 11 can be arranged between the two cross beams 12, or can be arranged above the two cross beams 12. In this embodiment, the main beam 11 is preferably arranged above the two cross beams 12, so that the middle leg assembly 23 will not interfere with the main beam 11 when sliding on the cross beam 12.

[0080] Furthermore, each leg assembly of the support mechanism includes at least two sections, and the two ends of the first telescopic assembly 51 are respectively arranged on two adjacent sections. The first telescopic assembly 51 is a hydraulic oil cylinder, and the telescopic movement of the front leg assembly 21 (the rear leg assembly 22 or the middle leg assembly 23) is realized by the telescopic movement of the hydraulic oil cylinder, and after the front leg assembly 21 (the rear leg assembly 22 or the middle leg assembly 23) rises to the required height, it is fixed by a pin-type mechanical structure, so that the safety performance of the erection device is higher.

[0081] Optionally, combined Figure 1As shown, the front leg assembly 21 and the rear leg assembly 22 are provided with folding mechanisms on both sides of the main beam 11 in the length direction; and one end of the folding mechanism on the front leg assembly 21 and the rear leg assembly 22 is fixed on the cross beam 12, and the other end is fixed on the front leg assembly 21 and the rear leg assembly 22 respectively.

[0082] In this embodiment, the front leg assembly 21 or the rear leg assembly 22 is located on both sides of the main beam 11 in the length direction, that is, the left and right sides of the front leg assembly 21 or the rear leg assembly 22. The left and right sides of the front leg assembly 21 and the rear leg assembly 22 are both hinged to the cross beam 12, and the left and right sides of the front leg assembly 21 and the left and right sides of the rear leg assembly 22 are both provided with folding mechanisms. One end of the folding mechanism on the left side of the front leg assembly 21 (rear leg assembly 22) is fixed to the left side of the front leg assembly 21 (rear leg assembly 22), and the other end is fixed to the left side of the cross beam 12; one end of the folding mechanism on the right side of the front leg assembly 21 (rear leg assembly 22) is fixed to the right side of the front leg assembly 21 (rear leg assembly 22), and the other end is fixed to the right side of the cross beam 12. Taking the front leg assembly 21 on the cross beam 12 on the left side of the erection device as an example, after releasing the hinge between the right side of the front leg assembly 21 and the right side of the cross beam 12, the folding mechanism on the left side of the front leg assembly 21 can drive the front leg assembly 21 on the left cross beam 12 to fold upward toward the outside of the cross beam 12; and after releasing the hinge between the left side of the front leg assembly 21 and the left side of the cross beam 12, the folding mechanism on the right side of the front leg assembly 21 can drive the front leg assembly 21 on the left cross beam 12 to fold upward toward the inside of the cross beam 12; wherein, the outside of the cross beam 12 refers to the side of the cross beam 12 outside the area surrounded by the frame beam assembly 1, and correspondingly, the inside of the cross beam 12 refers to the side of the cross beam 12 inside the area surrounded by the frame beam assembly 1. In this way, the front leg assembly 21 and the rear leg assembly 22 of the erection device can be folded upward by choosing to face the outside or inside of the cross beam 12 to meet different usage requirements.

[0083] Optionally, combined Figure 1 and Figure 2 As shown, the middle leg assembly 23 includes a connecting segment 231 and a supporting segment 232, one end of the connecting segment 231 is slidably connected to the cross beam 12, and the other end of the connecting segment 231 is hinged to the supporting segment 232; and one end of the folding mechanism on the middle leg assembly 23 is fixed to the connecting segment 231, and the other end is fixed to the supporting segment 232.

[0084] In this embodiment, the middle leg assembly 23 includes a connecting segment 231 and a supporting segment 232 that are hinged to each other. One end of the folding mechanism on the middle leg assembly 23 is fixed to the connecting segment 231, and the other end of the folding mechanism on the middle leg assembly 23 is fixed to the supporting segment 232. This arrangement facilitates the arrangement of a sliding component 24 (described later) between the middle leg assembly 23 and the cross beam 12.

[0085] Furthermore, folding mechanisms are provided on both the left and right sides of the middle leg assembly 23 .

[0086] Specifically, one end of the folding mechanism on the left side of the middle leg assembly 23 is fixed to the left side of the connecting segment 231, and the other end is fixed to the left side of the supporting segment 232; one end of the folding mechanism on the right side of the middle leg assembly 23 is fixed to the right side of the connecting segment 231, and the other end is fixed to the right side of the supporting segment 232. Taking the middle leg assembly 23 on the beam 12 on the left side of the erection device as an example, after the hinge between the right side of the connecting segment 231 and the right side of the supporting segment 232 is released, the left side of the connecting segment 231 is hinged to the left side of the supporting segment 232. At this time, the folding mechanism located on the left side of the middle leg assembly 23 can drive the middle leg assembly 23 to fold upward toward the outside of the beam 12; and after the hinge between the left side of the connecting segment 231 and the left side of the supporting segment 232 is released, the right side of the connecting segment 231 is hinged to the right side of the supporting segment 232. At this time, the folding mechanism located on the right side of the middle leg assembly 23 can drive the middle leg assembly 23 to fold upward toward the inside of the beam 12; wherein, the outside of the beam 12 refers to the side of the beam 12 outside the area surrounded by the frame beam assembly 1, and correspondingly, the inside of the beam 12 refers to the side of the beam 12 inside the area surrounded by the frame beam assembly 1. In this way, the middle leg assembly 23 of the erection device can be folded upward by selecting to face the outside or the inside of the crossbeam 12 to meet different usage requirements.

[0087] Furthermore, the folding mechanism is preferably a folding cylinder, one end of the folding cylinder on the front leg assembly 21 (rear leg assembly 22) is fixed to the front leg assembly 21 (rear leg assembly 22), and the other end is fixed to the crossbeam 12, one end of the folding cylinder on the middle leg assembly 23 is fixed to the connecting segment 231, and the other end is fixed to the supporting segment 232; the front leg assembly 21 (rear leg assembly 22 or middle leg assembly 23) is driven to fold upward by the contraction of the folding cylinder; and the front leg assembly 21 (rear leg assembly 22 or middle leg assembly 23) is driven to fold downward by the extension of the folding cylinder until the front leg assembly 21 (rear leg assembly 22 or middle leg assembly 23) is supported on the ground.

[0088] Optionally, combined Figure 1As shown, the support mechanism further includes a sliding assembly 24, and the connecting segment 231 is slidably connected to the cross beam 12 through the sliding assembly 24. In this way, the middle leg assembly 23 can slide at the bottom of the cross beam 12 along the length direction of the cross beam 12, so that the support position of the middle leg assembly 23 can be adjusted according to the use requirements; moreover, the middle leg assemblies 23 on the two cross beams 12 can slide forward and backward along the cross beam 12 under the action of the sliding assembly 24 to form a misalignment, so that when the two middle leg assemblies 23 are folded upward toward the inner sides of the two cross beams 12, there will be no interference between the two middle leg assemblies 23.

[0089] Optionally, combined Figure 3 and Figure 4 As shown, the support mechanism also includes an upper hinge seat 25, a lower hinge seat 26 and a pin shaft 27. The lower hinge seat 26 is fixed on the front support leg assembly 21 and the rear support leg assembly 22. The upper hinge seat 25 is fixed on the cross beam 12 at a position corresponding to the lower hinge seat 26. The upper hinge seat 25 and the lower hinge seat 26 are hinged by the pin shaft 27.

[0090] In this embodiment, pin holes for the pin shaft 27 to pass through are provided on the upper hinge seat 25 and the lower hinge seat 26. The pin holes on the upper hinge seat 25 and the lower hinge seat 26 are aligned, and then the pin shaft 27 is inserted into the pin hole to realize the hinge connection between the front leg assembly 21 (rear leg assembly 22) and the cross beam 12. Not only is the structure simple and easy to realize; moreover, the hinge connection between the front leg assembly 21 (rear leg assembly 22) and the cross beam 12 or the release of the hinge connection between the front leg assembly 21 (rear leg assembly 22) and the cross beam 12 can be realized by inserting the pin shaft 27 or pulling out the pin shaft 27, which is easy to operate.

[0091] Furthermore, upper hinge seats 25 are provided on both the left and right sides of the cross beam 12, and lower hinge seats 26 are provided on both the left and right sides of the front leg assembly 21 (rear leg assembly 22). Specifically, the upper end surface of the front leg assembly 21 (rear leg assembly 22) fits the lower end surface of the cross beam 12, the left side of the front leg assembly 21 (rear leg assembly 22) is hinged to the left side of the cross beam 12 through the upper hinge seat 25 and the lower hinge seat 26, and the right side of the front leg assembly 21 (rear leg assembly 22) is also hinged to the right side of the cross beam 12 through the upper hinge seat 25 and the lower hinge seat 26.

[0092] Furthermore, the connecting segment 231 and the supporting segment 232 of the middle leg assembly 23 are respectively provided with an upper hinge seat 25 and a lower hinge seat 26, and the connecting segment 231 and the supporting segment 232 are hinged by the upper hinge seat 25 and the lower hinge seat 26. Specifically, the upper hinge seat 25 is provided on both the left and right sides of the connecting segment 231, and the lower hinge seat 26 is provided on both the left and right sides of the supporting segment 232; in this way, both the left and right sides of the middle leg assembly 23 can be hinged by the upper hinge seat 25 and the lower hinge seat 26.

[0093] Optionally, combined Figure 5 As shown, there are two cross beams 12 , and the front leg assemblies 21 on the two cross beams 12 have a spacing in the length direction of the cross beam 12 , and the rear leg assemblies 22 on the two cross beams 12 also have a spacing in the length direction of the cross beam 12 .

[0094] The length direction of the beam 12 is Figure 1 In the present embodiment, the front leg assemblies 21 (rear leg assemblies 22) on the two cross beams 12 have a spacing in the length direction of the cross beam 12, so that the front leg assemblies 21 (rear leg assemblies 22) on the two cross beams 12 are staggered in the length direction of the cross beam 12, and when the two front leg assemblies 21 (rear leg assemblies 22) are folded upward toward the inner sides of the two cross beams 12, the two front leg assemblies 21 (rear leg assemblies 22) will not interfere with each other.

[0095] Optionally, combined Figure 3 As shown, the lifting mechanism 3 includes a winch 31, a lifting trolley 32, a sling 33 and a transverse cylinder 34. The winch 31 is fixed to both ends of the main beam 11, the sling 33 is fixed to the lifting trolley 32, one end of the transverse cylinder 34 is fixed to the main beam 11, and the other end of the transverse cylinder 34 is fixed to the lifting trolley 32.

[0096] In this embodiment, two lifting trolleys 32 are provided on each main beam 11, and each lifting trolley 32 is connected to a transverse oil cylinder 34. The lifting trolley 32 is driven on the main beam 11 along the length direction of the main beam 11 (i.e. Figure 3 The lifting trolley 32 can be translated in the Y-axis direction to adjust the position of the lifting trolley 32 on the main beam 11 or the distance between the two lifting trolleys 32 to meet the needs of the lifting operation.

[0097] Optionally, combined Figure 1 As shown, the telescopic mechanism further includes a second telescopic assembly 52 disposed on the crossbeam 12 for adjusting the length of the crossbeam 12 .

[0098] In the present embodiment, a second telescopic component 52 is provided on the beam 12 so that the beam 12 has a telescopic function. Specifically, the beam 12 usually includes at least two segments, and the two ends of the second telescopic component 52 are respectively fixed on two adjacent segments of the beam 12. The telescopic movement of the second telescopic component 52 drives the telescopic movement between the two adjacent segments of the beam 12, thereby achieving the purpose of changing the length of the beam 12. In this way, when the distance between the piers changes, the length of the beam 12 can be adjusted by the telescopic movement of the second telescopic component 52, so that the erection device can adapt to the distance between different piers, thereby avoiding the situation where the erection device cannot move forward normally due to the small distance between the piers, thereby improving the scope of application and versatility of the erection device.

[0099] Optionally, combined Figure 1 As shown, the cross beam 12 is a box beam structure, and the second telescopic assembly 52 is arranged in the cavity of the cross beam 12. In this way, by arranging the second telescopic assembly 52 in the cavity of the box beam structure to hide the second telescopic assembly 52, not only the second telescopic assembly 52 can be protected, but also the overall volume of the erection device is reduced, thereby optimizing the structure of the erection device.

[0100] Furthermore, the cross beam 12 is divided into a plurality of sections, a plurality of second telescopic assemblies 52 are provided, and the plurality of second telescopic assemblies 52 are arranged between two adjacent sections. This embodiment is described by taking the cross beam 12 as an example in which it is divided into three sections, namely the first section, the second section and the third section connected in sequence, a second telescopic assembly 52 is arranged between the first section and the second section, and between the second section and the third section, and the main beam 11 is arranged on the second section of the cross beam 12. In this way, the cross beam 12 can be moved in the front-to-back direction (i.e. Figure 1 The crossbeam 12 can be extended and retracted in the X-axis direction to adjust the length of the crossbeam 12.

[0101] Furthermore, the main beam 11 also has a box beam structure, so that the weight of the erection device can be reduced.

[0102] Optionally, the running mechanism 4 is suitable for performing 360° rotation relative to the front leg assembly 21 , the middle leg assembly 23 or the rear leg assembly 22 .

[0103] Specifically, the running mechanism 4 is rotatably connected to the bottom of the front leg assembly 21, the middle leg assembly 23 or the rear leg assembly 22, so that the running mechanism 4 can rotate 360° around the axis of the front leg assembly 21, the middle leg assembly 23 or the rear leg assembly 22. Since the width of the pier is usually wide, the erection device can only meet the assembly of each section of the pier by moving along the length direction of the main beam 11 (i.e., lateral movement). After the pier is installed, by rotating the running mechanism 4, the erection device can move along the length direction of the crossbeam 12 (i.e., longitudinal movement) to reach the next pier for installation without rotating the entire erection device, which is simple and convenient to operate; moreover, the running mechanism 4 can rotate 360°, so that the running mechanism 4 does not need to distinguish the rotation direction each time it rotates 90 degrees, which improves the convenience of the running mechanism 4 when rotating.

[0104] Furthermore, the running mechanism 4 includes a frame 41 and a wheel set 42 fixed on the frame 41, and the frame 41 is rotatably connected to the bottom of the support mechanism. In this way, the wheel set 42 is rotatably connected to each leg assembly of the support mechanism through the frame 41 to ensure the stability of the connection between the running mechanism 4 and each leg assembly.

[0105] The embodiment of the present invention further provides a method for erecting a prefabricated bridge pier, using the above-mentioned prefabricated bridge pier erection device (hereinafter referred to as the erection device), comprising:

[0106] Step 1: The erection device moves to the pier 6, the transport vehicle transports the pier column 7 to the bottom of the erection device, the erection device lifts the pier column 7, the transport vehicle exits the erection device, and the pier column 7 is vertically installed on the pier 6 through the retracting and extending action of the erection device;

[0107] Combination Figure 6 (a) and Figure 6 As shown in (b), before assembling the bridge piers, the erection device needs to be moved to the rear of the pier 6 of the prefabricated bridge pier to be assembled; Figure 7 (a) and Figure 7 (b) Figure 8 (a) and Figure 8 (b), where Figure 6 (b) to Figure 8 (b) Figure 6 (a) to Figure 8 In the left view in (a), step 1 specifically includes the following steps:

[0108] Step 1.1, the traveling mechanism 4 of the erection device drives the erection device to move forward to the pier 6, and stops when the rear main beam in the erection device is located above the pier 6;

[0109] Step 1.2, the transport vehicle transports the bridge pier column 7 to the bottom of the erection device, the lifting mechanism 3 of the erection device lifts the bridge pier column 7, the transport vehicle exits the erection device, and the bridge pier column 7 is vertically installed on the pier 6 through the retracting and extending action of the lifting mechanism 3. In this step, the bridge pier column 7 is in a horizontal state when it is lifted, and through the retracting and extending action of the lifting mechanism 3, that is, the lifting trolley 32 on the rear main beam retracts the sling 33 upward, and the lifting trolley 32 on the front main beam lowers the sling 33, so that the bridge pier column 7 is changed from a horizontal state to a vertical state, so as to facilitate assembly with the pier 6.

[0110] Step 2: The erection device is moved horizontally to one side of the pier 6, the transport vehicle transports the pier cap beam 8 to enter the bottom of the erection device, the erection device lifts the pier cap beam 8, the transport vehicle exits the erection device, and the erection device is moved horizontally to the top of the pier column 7 to assemble the pier cap beam 8 with the pier column 7;

[0111] Specifically, combined Fig. 9 (a) and Fig. 9 (b) to Fig.11 (a) and Fig.11 As shown in (b), step 2 includes the following steps:

[0112] Step 2.1, the running mechanism 4 on the front leg assembly 21, the middle leg assembly 23 and the rear leg assembly 22 of the erection device rotates 90 degrees, and the running mechanism 4 drives the erection device to move left to the left side of the pier 6;

[0113] Step 2.2, the running mechanism 4 on the front leg assembly 21, the middle leg assembly 23 and the rear leg assembly 22 rotates 90 degrees, the transport vehicle transports the bridge pier cap beam 8 to the bottom of the erection device, the lifting mechanism 3 lifts the bridge pier cap beam 8, and the transport vehicle exits the erection device;

[0114] In this step, since the running mechanism 4 has a certain length, before the transport vehicle enters under the erection device, the running mechanism 4 on the front leg assembly 21, the middle leg assembly 23 and the rear leg assembly 22 needs to be rotated 90 degrees so that the running direction of the running mechanism 4 is along the length direction of the crossbeam 12, that is, the running mechanism 4 is longitudinally arranged at this time, so as to avoid hindering the transport vehicle from entering under the erection device when the running mechanism 4 is arranged horizontally.

[0115] Step 2.3, the running mechanism 4 on the front leg assembly 21, the middle leg assembly 23 and the rear leg assembly 22 rotates 90 degrees, and the running mechanism 4 drives the erection device to move right to above the pier column 7 to assemble the pier cap beam 8 and the pier column 7.

[0116] Step 3, the erection device is moved horizontally to one side of the pier 6, the transport vehicle transports the pier end beam 9 to enter the bottom of the erection device, the erection device lifts the pier end beam 9, the transport vehicle exits the erection device, and the erection device is moved horizontally to the end of the pier cap beam 8 to assemble the pier end beam 9 with the pier cap beam 8;

[0117] Specifically, combined Fig.12 (a) and Fig.12 (b) Fig.13 (a) and Fig.13 As shown in (b), step 3 includes the following steps:

[0118] Step 3.1, the running mechanism 4 drives the erection device to move left to the left side of the pier 6, the running mechanism 4 on the front leg assembly 21, the middle leg assembly 23 and the rear leg assembly 22 rotates 90 degrees, the transport vehicle transports the bridge pier end beam 9 at the left end to enter the bottom of the erection device, the lifting mechanism 3 lifts the bridge pier end beam 9 at the left end, and the transport vehicle exits the erection device;

[0119] Step 3.2, the running mechanism 4 on the front leg assembly 21, the middle leg assembly 23 and the rear leg assembly 22 rotates 90 degrees, and the running mechanism 4 drives the erection device to move right to the left end of the pier cap beam 8 to assemble the pier cap beam 8 with the left end pier end beam 9;

[0120] Step 4: Repeat step 3 to complete the assembly of another pier end beam 9, that is, complete the assembly of the pier end beam 9 at the right end.

[0121] Specifically, combined Fig.14 (a) and Fig.14 (b) Fig.15 (a) and Fig.15 As shown in (b), step 4 includes the following steps:

[0122] Step 4.1, the running mechanism 4 drives the erection device to move right to the right side of the pier 6, the running mechanism 4 on the front leg assembly 21, the middle leg assembly 23 and the rear leg assembly 22 rotates 90 degrees, the transport vehicle transports the right end pier end beam 9 to enter the bottom of the erection device, the lifting mechanism 3 lifts the right end pier end beam 9, and the transport vehicle exits the erection device;

[0123] Step 4.2, the running mechanism 4 on the front leg assembly 21, the middle leg assembly 23 and the rear leg assembly 22 rotates 90 degrees, and the running mechanism 4 drives the erection device to move left to the right end of the pier cap beam 8 to assemble the pier cap beam 8 with the pier end beam 9 at the right end.

[0124] In this embodiment, steps 1 to 4 are performed to complete the assembly of the various segments of the prefabricated pier.

[0125] Optionally, after step 4, the following steps are further included:

[0126] Step 5. After the prefabricated bridge piers are assembled, the middle leg assembly 23 of the erection device moves toward the rear leg assembly 22 of the erection device to a preset position and is supported on the ground. The rear leg assembly 22 is flipped upward. After the erection device moves forward until the rear leg assembly 22 passes over the assembled prefabricated bridge piers, the rear leg assembly 22 is folded downward, and at the same time, the middle leg assembly 23 is retracted off the ground, and the front leg assembly 21 and the rear leg assembly 22 of the erection device are supported on the ground.

[0127] Specifically, combined Fig.16 (a) and Fig.16 (b) to Fig. 20 (a) and Fig. 20 As shown in (b), step 5 includes the following steps:

[0128] Step 5.1, the running mechanism 4 on the middle leg assembly 23 drives the middle leg assembly 23 to move backward to the rear support position, and the running mechanism 4 on the front leg assembly 21 and the middle leg assembly 23 rotates 90 degrees;

[0129] In this step, the rear support position is a preset position, which refers to a position close to the rear leg assembly 22 .

[0130] Step 5.2, the rear leg assembly 22 is folded upward toward the inner side of the cross beam 12;

[0131] Step 5.3, the traveling mechanism 4 drives the erection device to move forward until the rear leg assembly 22 passes over the prefabricated bridge pier after assembly, and stops at a position 0.5 m away from the prefabricated bridge pier after assembly;

[0132] Step 5.4, flip down the rear leg assembly 22;

[0133] Step 5.5: The running mechanism 4 on the rear leg assembly 22 rotates 90 degrees and retracts the middle leg assembly 23.

[0134] Through steps 5.1 to 5.5, the erection device is completed and quickly moved to the next pier by crossing the assembled prefabricated piers. The operation is simple and convenient.

[0135] Combination Fig.21 (a) and Fig.21 (b) to Fig.33 (a) and Fig.33 (b), the embodiment of the present invention further provides a method for passing obstacles with a prefabricated pier erection device, using the above-mentioned prefabricated pier erection device (hereinafter referred to as the erection device), comprising the following steps:

[0136] Step a, the erection device moves forward until the distance between the front leg assembly 21 of the erection device and the obstacle reaches a preset distance, and the middle leg assembly 23 of the erection device moves forward to the front support position;

[0137] In this step, the front support position refers to a position close to the front leg assembly 21. Before the front leg assembly 21 is folded upward, the middle leg assembly 23 needs to be moved to the front support position to support the front end of the erection device to prevent the erection device from tipping backward when the front leg assembly 21 is folded upward.

[0138] Step b, the middle leg assembly 23 extends downward until it is supported on the ground, the front leg assembly 21 retracts, and the running mechanism 4 on the front leg assembly 21 rotates 90 degrees;

[0139] In this step, before the front leg assembly 21 is folded upward, the running mechanism 4 on the front leg assembly 21 needs to be rotated 90 degrees so that the running direction of the running mechanism 4 on the front leg assembly 21 is along the length direction of the main beam 11, that is, the running mechanism 4 on the front leg assembly 21 is horizontally arranged at this time to avoid interference between the running mechanism 4 on the front leg assembly 21 when the front leg assembly 21 on the two cross beams 12 is folded upward.

[0140] Step c, the front leg assembly 21 is folded upward, and the erection device moves forward until the front leg assembly 21 passes over the obstacle;

[0141] In this step, the front leg assembly 21 is folded toward the inside of the cross beam 12 to shorten the lateral width of the erection device when the front leg assembly 21 is folded upward, thereby avoiding collision between the erection device and equipment or buildings on both sides of the pier.

[0142] Step d, the front leg assembly 21 is folded downward, and the running mechanism 4 on the front leg assembly 21 is rotated 90 degrees, and then the front leg assembly 21 is extended downward to support the ground. At the same time, after one of the two middle leg assemblies 23 moves backward to the rear support position, the two middle leg assemblies 23 are retracted, and the running mechanism 4 on the middle leg assembly 23 is rotated 90 degrees;

[0143] Step e, the middle leg assembly 23 is folded upward, and when the erection device moves forward until the distance between the rear leg assembly 22 of the erection device and the obstacle reaches a preset distance, the middle leg assembly 23 is folded downward, and at the same time, the other middle leg assembly 23 of the two middle leg assemblies 23 moves to the rear support position;

[0144] In this step, the rear support position refers to a position close to the rear leg assembly 22 .

[0145] Step f, after the running mechanism on the middle leg assembly 23 rotates 90 degrees, the middle leg assembly 23 is supported on the ground, and at the same time, the rear leg assembly 22 retracts, and the running mechanism 4 on the rear leg assembly 22 rotates 90 degrees;

[0146] Step g, the rear leg assembly 22 is folded upward, and after the erection device moves forward until the rear leg assembly 22 passes over the obstacle, the rear leg assembly 22 is folded downward;

[0147] Step h: the running mechanism 4 on the rear leg assembly 22 rotates 90 degrees, the rear leg assembly 22 extends downward to support the ground, and the middle leg assembly 23 retracts.

[0148] The preset distance in step a and step e is a preset value, and its size can be set according to actual needs. In this implementation, the preset distance is usually 0.5m.

[0149] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A prefabricated bridge pier erection device, characterized in that: include: A frame beam assembly (1) comprising a cross beam (12) and a main beam (11) arranged on the cross beam (12); A supporting mechanism, which is arranged at the bottom of the crossbeam (12) and is used to support the frame beam assembly (1); A lifting mechanism (3), which is arranged on the top of the main beam (11) and is used to lift the prefabricated bridge piers to be assembled; A running mechanism (4), which is arranged at the bottom of the supporting mechanism and is used to drive the supporting mechanism to move; A telescopic mechanism, comprising a first telescopic assembly (51) arranged on the support mechanism and used for driving the support mechanism to telescope; A folding mechanism, which is arranged on the supporting mechanism and is used to drive the supporting mechanism to fold upwards; The support mechanism comprises a front leg assembly (21), a middle leg assembly (23) and a rear leg assembly (22) which are arranged in sequence, and the front leg assembly (21) and the rear leg assembly (22) are both hinged to the crossbeam (12), and the middle leg assembly (23) is slidably connected to the crossbeam (12); The front leg assembly (21) and the rear leg assembly (22) are both provided with the folding mechanism on both sides of the main beam (11) in the length direction; and one end of the folding mechanism on the front leg assembly (21) and the rear leg assembly (22) is fixed to the cross beam (12), and the other end is respectively fixed to the front leg assembly (21) and the rear leg assembly (22); Two cross beams (12) are provided, and the front leg assemblies (21) on the two cross beams (12) are spaced apart in the length direction of the cross beam (12), and the rear leg assemblies (22) on the two cross beams (12) are also spaced apart in the length direction of the cross beam (12).

2. The prefabricated bridge pier erection device according to claim 1, characterized in that: The middle leg assembly (23) comprises a connecting segment (231) and a supporting segment (232); one end of the connecting segment (231) is slidably connected to the cross beam (12), and the other end of the connecting segment (231) is hinged to the supporting segment (232); and one end of the folding mechanism on the middle leg assembly (23) is fixed to the connecting segment (231), and the other end is fixed to the supporting segment (232).

3. The prefabricated bridge pier erection device according to claim 2, characterized in that: The support mechanism further comprises a sliding assembly (24), and the connecting segment (231) and the crossbeam (12) are slidingly connected via the sliding assembly (24).

4. The prefabricated bridge pier erection device according to claim 1, characterized in that: The support mechanism further comprises an upper hinge seat (25), a lower hinge seat (26) and a pin shaft (27); the lower hinge seat (26) is fixed to the front leg assembly (21) and the rear leg assembly (22); the upper hinge seat (25) is fixed to a position on the cross beam (12) corresponding to the lower hinge seat (26); the upper hinge seat (25) and the lower hinge seat (26) are hingedly connected via the pin shaft (27).

5. The prefabricated bridge pier erection device according to claim 1, characterized in that: The lifting mechanism (3) includes a winch (31), a lifting trolley (32), a sling (33) and a transverse cylinder (34); the winch (31) is fixed to both ends of the main beam (11); the sling (33) is fixed to the lifting trolley (32); one end of the transverse cylinder (34) is fixed to the main beam (11) and the other end of the transverse cylinder (34) is fixed to the lifting trolley (32).

6. The prefabricated bridge pier erection device according to any one of claims 1 to 5, characterized in that: The telescopic mechanism also includes a second telescopic assembly (52) arranged on the crossbeam (12) and used for adjusting the length of the crossbeam (12).

7. The prefabricated bridge pier erection device according to claim 6, characterized in that: The cross beam (12) is a box beam structure, and the second telescopic assembly (52) is arranged in a cavity of the cross beam (12).

8. The prefabricated bridge pier erection device according to claim 1, characterized in that: The running mechanism (4) is suitable for performing 360° rotation relative to the front leg assembly (21), the middle leg assembly (23) or the rear leg assembly (22).

9. A method for erecting a prefabricated bridge pier, using the prefabricated bridge pier erection device according to any one of claims 1 to 8, characterized in that: include: Step 1, the prefabricated pier erection device is moved to the pier platform (6), the transport vehicle transports the pier column (7) and enters below the prefabricated pier erection device, the prefabricated pier erection device lifts the pier column (7), the transport vehicle exits the prefabricated pier erection device, and the pier column (7) is vertically installed on the pier platform (6) through the retracting and extending action of the prefabricated pier erection device; Step 2, the prefabricated pier erection device is moved horizontally to one side of the pier platform (6), the transport vehicle transports the pier cap beam (8) and enters below the prefabricated pier erection device, the prefabricated pier erection device lifts the pier cap beam (8), the transport vehicle exits the prefabricated pier erection device, and the prefabricated pier erection device is moved horizontally to above the pier column (7) to assemble the pier cap beam (8) and the pier column (7); Step 3, the prefabricated pier erection device is moved horizontally to one side of the pier platform (6), the transport vehicle transports the pier end beam (9) and enters below the prefabricated pier erection device, the prefabricated pier erection device lifts the pier end beam (9), the transport vehicle exits the prefabricated pier erection device, and the prefabricated pier erection device is moved horizontally to the end of the pier cap beam (8) to assemble the pier end beam (9) and the pier cap beam (8); Step 4: Repeat step 3 to complete the assembly of another pier end beam (9).

10. The method for erecting prefabricated bridge piers according to claim 9, characterized in that: After step 4, the method further includes: Step 5: After the prefabricated piers are assembled, the middle leg assembly (23) of the prefabricated pier erection device moves to a preset position in the direction of the rear leg assembly (22) of the prefabricated pier erection device and is supported on the ground, the rear leg assembly (22) is flipped upward, and after the prefabricated pier erection device moves forward until the rear leg assembly (22) passes over the assembled prefabricated piers, the rear leg assembly (22) is folded downward, and at the same time, the middle leg assembly (23) is retracted off the ground, and the front leg assembly (21) and the rear leg assembly (22) of the prefabricated pier erection device are supported on the ground.

11. A method for passing obstacles by a prefabricated pier erection device, using the prefabricated pier erection device as claimed in any one of claims 1 to 8, characterized in that: include: Step a, when the prefabricated pier erection device moves forward until the distance between the front leg assembly (21) of the prefabricated pier erection device and the obstacle reaches a preset distance, the middle leg assembly (23) of the prefabricated pier erection device moves forward to the front support position; Step b, the middle leg assembly (23) extends downward until it is supported on the ground, the front leg assembly (21) retracts, and the running mechanism (4) on the front leg assembly (21) rotates 90 degrees; Step c, the front leg assembly (21) is folded upward, and the prefabricated pier erection device moves forward until the front leg assembly (21) passes over the obstacle; Step d, the front leg assembly (21) is folded downward, and the running mechanism (4) on the front leg assembly (21) is rotated 90 degrees, and then the front leg assembly (21) is extended downward to be supported on the ground, and at the same time, after one of the two middle leg assemblies (23) moves backward to the rear support position, the two middle leg assemblies (23) are retracted, and the running mechanism (4) on the middle leg assembly (23) is rotated 90 degrees; Step e, the middle leg assembly (23) is folded upward, and when the distance between the rear leg assembly (22) of the prefabricated pier erection device and the obstacle reaches the preset distance, the middle leg assembly (23) is folded downward, and at the same time, the other middle leg assembly (23) of the two middle leg assemblies (23) moves to the rear support position; Step f, after the running mechanism (4) on the middle leg assembly (23) rotates 90 degrees, the middle leg assembly (23) is supported on the ground, and at the same time, the rear leg assembly (22) retracts, and the running mechanism (4) on the rear leg assembly (22) rotates 90 degrees; Step g, the rear leg assembly (22) is folded upward, and after the prefabricated pier erection device moves forward until the rear leg assembly (22) passes over the obstacle, the rear leg assembly (22) is folded downward; Step h: the running mechanism (4) on the rear leg assembly (22) is rotated 90 degrees, the rear leg assembly (22) is extended downward to be supported on the ground, and the middle leg assembly (23) is retracted at the same time.

Images