In-situ turning device suitable for various bridge erecting machines

Abstract

The utility model relates to an in-situ turning-around device suitable for various bridge erecting machines, and the device comprises an in-situ turning-around rotating disc which comprises a lower fixed disc and an upper rotating disc, the lower fixed disc and the upper rotating disc are coaxially and rotatably connected, and the lower fixed disc is provided with a driving mechanism for driving the upper rotating disc to rotate; the bridge erecting machine fixing seat comprises two sets of bearing beams which are fixed to the top of the upper rotating disc and are arranged in parallel at intervals, and first locking bolt holes and second locking bolt holes which are used for being connected with bridge erecting machine arms with different widths are formed in the two sets of bearing beams. The two sets of bearing beams are arranged on the top of the upper rotating disc in parallel at intervals, and the two sets of bearing beams are provided with first locking bolt holes and second locking bolt holes used for being connected with bridge erecting machine arms with different widths. The first locking bolt holes and the second locking bolt holes can be matched with and fix single-line bridge erecting machines and double-line bridge erecting machines with different tonnages and different bridge erecting machine arm widths. And the universality of the in-situ turning device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridging machinery, and in particular to a device for turning around in place applicable to various bridge erection machines. BACKGROUND

[0002] With the continuous increase in the scale of high-speed rail construction, the terrain, geology and environmental conditions are becoming more and more complex. There are often double-line precast box girder erection and single-line precast box girder erection on one high-speed rail line, and the existing demand for erecting girders requires the bridge erection machine to turn around in place by 180 degrees during single-line erection and double-line erection.

[0003] The traditional method is to realize the turning around of the bridge erection machine by disassembling the entire bridge erection machine and reassembling it, which not only takes time, effort and money, but also seriously affects the construction efficiency. Moreover, disassembling on the bridge increases the risk of accidents, and the turning around of the bridge erection machine in the beam field requires a large space, resulting in high construction cost of the beam field.

[0004] The tonnage and the width of the machine arm of the single-line girder erection bridge erection machine and the double-line girder erection bridge erection machine are different. At present, there is no universal bridge erection machine turning device that can adapt to the single-line and double-line bridge erection machine turning around in place by 180 degrees. Under the current situation, it is urgent to develop a safe and reliable bridge erection machine turning device that can adapt to various bridge erection machines turning around in place, and can be used for single-line and double-line bridge erection machines turning around in place. SUMMARY

[0005] The embodiment of the present application provides a device for turning around in place applicable to various bridge erection machines, to solve the problem that the bridge erection machine turning device cannot simultaneously adapt to single-line and double-line bridge erection machine turning around in place by 180 degrees in the related art.

[0006] The embodiment of the present application provides a device for turning around in place applicable to various bridge erection machines, comprising:

[0007] A turning disc for turning around in place, comprising a lower fixed disc and an upper rotating disc, the lower fixed disc and the upper rotating disc are coaxially connected, and the lower fixed disc is provided with a driving mechanism for driving the upper rotating disc to rotate;

[0008] A bridge erection machine fixing seat, comprising two groups of spacer beams parallel to each other and spaced apart fixed on the top of the upper rotating disc, and the two groups of spacer beams are each provided with a first locking pin hole and a second locking pin hole for connecting the machine arms of different widths.

[0009] In some embodiments: the two ends of the spacer beam are respectively provided with the first locking pin hole and the second locking pin hole, and the distance between the two first locking pin holes located at the adjacent ends of the two groups of spacer beams is less than the distance between the two second locking pin holes located at the adjacent ends of the two groups of spacer beams.

[0010] In some embodiments: the top of the cushion beam is fixedly connected with a rubber pad, the first and second locking bolt holes are long holes, and the length direction of the first and second locking bolt holes is perpendicular to the length direction of the cushion beam.

[0011] In some embodiments: the lower fixed disc comprises a lower mounting seat, and a rotating shaft assembly fixedly connected to the top of the lower mounting seat, and the center of the upper rotating disc is provided with a rotating shaft mounting hole connected with the rotating shaft assembly.

[0012] In some embodiments: the upper rotating disc comprises an upper flange disc and a lower flange disc coaxially and spaced apart, and the upper flange disc and the lower flange disc are fixedly connected by a plurality of spacer sleeves with gradually increasing diameters.

[0013] The edges of the upper flange disc and the lower flange disc are provided with a plurality of bolt holes arranged in a circle, and the bolt holes on the upper flange disc and the lower flange disc are in communication with each other.

[0014] In some embodiments: the driving mechanism comprises a hydraulic cylinder rotatably connected to the lower fixed disc, and the telescopic arm of the hydraulic cylinder is connected to the bolt holes on the upper flange disc and the lower flange disc through a bolt.

[0015] In some embodiments: it further comprises a derrick support fixed to the bottom of the lower fixed disc, and the bottom of the derrick support is connected with a beam carrier.

[0016] In some embodiments: the derrick support comprises a double-line derrick support and a single-line derrick support, and the double-line derrick support and the single-line derrick support each comprise an upper cross beam connected with the lower fixed disc, and a support leg detachably connected to the bottom of the upper cross beam.

[0017] The two ends of the upper cross beam are fixedly provided with a first mounting seat, and two second mounting seats are fixedly provided between the two first mounting seats and the upper cross beam, and the first mounting seat and the second mounting seat are used for connecting the support leg.

[0018] In some embodiments: the double-line derrick support and the single-line derrick support further comprise a lower cross beam, the length of the lower cross beam of the double-line derrick support is greater than the length of the lower cross beam of the single-line derrick support, and the top of the lower cross beam is symmetrically connected with at least two support legs.

[0019] In some embodiments: the bottom of the double-line derrick support is provided with two parallel beam carriers, the bottom of the single-line derrick support is provided with one beam carrier, the top of the lower cross beam is connected with four support legs, and the four support legs are fixedly arranged at the four corners of the lower cross beam.

[0020] The beneficial effects brought by the technical scheme provided in the application include:

[0021] The in-place U-turn device for various bridge erecting machines provided in the embodiments of the application is provided with an in-place U-turn turntable, the in-place U-turn turntable comprises a lower fixed disc and an upper rotating disc, the lower fixed disc and the upper rotating disc are coaxially connected in rotation, and the lower fixed disc is provided with a driving mechanism for driving the upper rotating disc to rotate; the bridge erecting machine fixing seat comprises two groups of spacer beams which are parallel to each other and are arranged at intervals on the top of the upper rotating disc, and the two groups of spacer beams are each provided with a first locking bolt hole and a second locking bolt hole for connecting bridge erecting machine arms of different widths.

[0022] Therefore, the in-place U-turn device for various bridge erecting machines provided in the application is provided with two groups of spacer beams which are parallel to each other and are arranged at intervals on the top of the upper rotating disc, and the two groups of spacer beams are each provided with a first locking bolt hole and a second locking bolt hole for connecting bridge erecting machine arms of different widths. The first locking bolt hole and the second locking bolt hole can be adapted to and fixed with single-line bridge erecting machines and double-line bridge erecting machines of different tonnages and different bridge erecting machine arm widths, thereby improving the universal performance of the in-place U-turn device. After the bridge erecting machine arms of the single-line bridge erecting machine or the double-line bridge erecting machine are fixedly connected with the spacer beams through the first locking bolt hole or the second locking bolt hole, the upper rotating disc can be driven to rotate through the driving mechanism on the lower fixed disc, and then the in-place 180° U-turn of the bridge erecting machine is realized. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0024] Figure 1 The structure diagram of the upper rotating disc and the bridge erecting machine fixing seat in the embodiments of the application;

[0025] Figure 2 The structure diagram of the lower fixed disc in the embodiments of the application;

[0026] Figure 3 The structure diagram of the single-line piggyback beam support and the in-place U-turn turntable in the embodiments of the application;

[0027] Figure 4 The use state diagram of the single-line piggyback beam support and the in-place U-turn turntable in the embodiments of the application;

[0028] Figure 5 The structure diagram of the double-line piggyback beam support and the in-place U-turn turntable in the embodiments of the application;

[0029] Figure 6 Figure 1 is a schematic diagram of the use state of the double-line girder carrier support and the original turning turntable according to the embodiment of the present application.

[0030] Reference signs:

[0031] 10, lower fixed disc; 11, lower mounting seat; 12, rotating shaft assembly; 13, oil cylinder mounting seat;

[0032] 20, upper rotating disc; 21, upper flange disc; 22, lower flange disc; 23, spacer sleeve; 24, latch hole; 25, rotating shaft mounting hole;

[0033] 30, bridge erecting machine fixing seat; 31, cushion beam; 32, first locking latch hole; 33, second locking latch hole; 34, rubber pad;

[0034] 40, driving mechanism; 41, hydraulic oil cylinder; 42, latch;

[0035] 50, single-line girder carrier support; 51, upper cross beam; 52, supporting leg; 53, lower cross beam; 60, double-line girder carrier support; 70, bridge erecting machine arm. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0037] The embodiments of the present application provide an original turning device suitable for various bridge erecting machines, which can solve the problem that the turning device of the bridge erecting machine cannot synchronously adapt to the original 180° turning of the single-line and double-line bridge erecting machines in the related art.

[0038] Referring to Figure 1 and Figure 2 , the embodiments of the present application provide an original turning device suitable for various bridge erecting machines, which comprises:

[0039] The original turning turntable comprises a lower fixed disc 10 and an upper rotating disc 20, the lower fixed disc 10 and the upper rotating disc 20 are coaxially connected in rotation, and the lower fixed disc 10 is provided with a driving mechanism 40 for driving the upper rotating disc 20 to rotate. The driving mechanism 40 is connected to the lower fixed disc 10 to drive the upper rotating disc 20 to rotate 360° in forward and reverse directions on the lower fixed disc 10. When the lower fixed disc 10 and the upper rotating disc 20 perform the original turning of the bridge erecting machine, the driving mechanism 40 only needs to drive the upper rotating disc 20 to rotate 180° in forward and reverse directions.

[0040] The bridge erecting machine fixing seat 30 includes two groups of parallel and spaced apart cushion beams 31 fixed on the top of the upper rotating disc 20, and the two groups of cushion beams 31 are each provided with a first locking pin hole 32 and a second locking pin hole 33 for connecting bridge erecting machine arms 70 of different widths. The two groups of cushion beams 31 are used to fix and support the bridge erecting machine arms 70. The first locking pin hole 32 is used to fix the bridge erecting machine arms 70 of a bridge erecting machine with a lifting tonnage of 900 tons, and the second locking pin hole 33 is used to fix the bridge erecting machine arms 70 of a bridge erecting machine with a lifting tonnage of 1000 tons.

[0041] When the in-place turning device turns the bridge erecting machine in place, the bridge erecting machine arm 70 of the bridge erecting machine to be turned in place is first lowered onto the bridge erecting machine fixing seat 30, then the first locking pin hole 32 or the second locking pin hole 33 is selected according to the width of the bridge erecting machine arm 70 of the bridge erecting machine to be turned in place, and finally the bridge erecting machine arm 70 is fixed on the cushion beam 31 by inserting the locking pin into the first locking pin hole 32 or the second locking pin hole 33, so as to finally realize the fixed connection of the bridge erecting machine arm 70 and the in-place turning device.

[0042] The in-place turning device of the embodiment of the present application is provided with two groups of parallel and spaced apart cushion beams 31 on the top of the upper rotating disc 20, and the two groups of cushion beams 31 are each provided with a first locking pin hole 32 and a second locking pin hole 33 for connecting bridge erecting machine arms 70 of different widths. The first locking pin hole 32 and the second locking pin hole 33 can be adapted to and fixed with single-line bridge erecting machines and double-line bridge erecting machines of different tonnages and different widths of bridge erecting machine arms 70.

[0043] After the bridge erecting machine arm 70 of the single-line bridge erecting machine or the double-line bridge erecting machine is fixed and connected with the cushion beam 31 through the first locking pin hole 32 or the second locking pin hole 33, the upper rotating disc 20 can be driven to rotate 180° by the driving mechanism 40 on the lower fixing disc 10, so as to realize the in-place 180° turning of the bridge erecting machine.

[0044] In some optional embodiments, referring to Figure 1 The in-place turning device of the embodiment of the present application is provided with two groups of parallel and spaced apart cushion beams 31 on the top of the upper rotating disc 20, and the two groups of cushion beams 31 are each provided with a first locking pin hole 32 and a second locking pin hole 33 for connecting bridge erecting machine arms 70 of different widths. The first locking pin hole 32 and the second locking pin hole 33 can be adapted to and fixed with single-line bridge erecting machines and double-line bridge erecting machines of different tonnages and different widths of bridge erecting machine arms 70.

[0045] The embodiment of the present application is provided with the first locking bolt hole 32 and the second locking bolt hole 33, the distance between the two first locking bolt holes 32 on the two adjacent ends of the two groups of cushion beams 31 is smaller than the distance between the two second locking bolt holes 33 on the two adjacent ends of the two groups of cushion beams 31, the first locking bolt hole 32 is used for fixing the bridge erecting machine arm 70 with a narrow width, and the second locking bolt hole 33 is used for fixing the bridge erecting machine arm 70 with a wide width.

[0046] In some optional embodiments, referring to Figure 1 The embodiment of the present application provides the U-turn device applicable to various bridge erecting machines, the top of the cushion beam 31 is fixedly connected with the rubber pad 34, the first locking bolt hole 32 and the second locking bolt hole 33 are both long holes, and the length direction of the first locking bolt hole 32 and the second locking bolt hole 33 is perpendicular to the length direction of the cushion beam 31.

[0047] The top of the cushion beam 31 is fixedly connected with the rubber pad 34, the rubber pad 34 is used for increasing the friction between the bridge erecting machine arm 70 and the cushion beam 31, and also used for protecting the bridge erecting machine arm 70 from being worn and collided, the first locking bolt hole 32 and the second locking bolt hole 33 are both long holes, facilitating the assembly of the bridge erecting machine arm 70 and the cushion beam 31, and improving the assembly and installation efficiency of the bridge erecting machine arm 70 and the cushion beam 31.

[0048] In some optional embodiments, referring to Figure 1 and Figure 2 The embodiment of the present application provides the U-turn device applicable to various bridge erecting machines, the lower fixing disc 10 includes the lower mounting seat 11 and the rotating shaft assembly 12 fixedly connected to the top of the lower mounting seat 11, and the rotating shaft assembly 12 is used for rotationally connecting the upper rotating disc 20. The center position of the upper rotating disc 20 is provided with the rotating shaft mounting hole 25 connected with the rotating shaft assembly 12.

[0049] The lower mounting seat 11 of the lower fixing disc 10 is used for fixing the U-turn disc at a set station, the rotating shaft assembly 12 on the lower mounting seat 11 is used for rotationally connecting the upper rotating disc 20, and the upper rotating disc 20 rotates on the lower mounting seat 11 with the rotating shaft assembly 12 as the rotating shaft. The lower mounting seat 11 and the upper rotating disc 20 can be connected through a thrust ball bearing or connected through a pair of annular friction pairs with smooth surfaces, and lubricating grease is applied on the friction surface of the annular friction pair in order to reduce the sliding resistance.

[0050] In some optional embodiments, referring to Figures 1 to 3As shown, the embodiment of the present application provides a U-turn device applicable to various bridge erecting machines, the upper rotating disc 20 of the U-turn device comprises an upper flange disc 21 and a lower flange disc 22 coaxially and spaced apart, and the upper flange disc 21 and the lower flange disc 22 are fixedly connected through a plurality of spacer sleeves 23 with gradually increasing diameters. The edges of the upper flange disc 21 and the lower flange disc 22 are each provided with a plurality of pin holes 24 arranged in a circle, and the pin holes 24 on the upper flange disc 21 and the lower flange disc 22 are in communication with each other.

[0051] The driving mechanism 40 comprises a hydraulic cylinder 41 rotatably connected to the lower fixed disc 10, and the telescopic arm of the hydraulic cylinder 41 is connected to the pin holes 24 on the upper flange disc 21 and the lower flange disc 22 through the pin 42. The oil cylinder mounting seat 13 for rotatably connecting the hydraulic cylinder 41 is fixedly connected to the lower mounting seat 11, and the hydraulic cylinder 41 is rotatably connected to the oil cylinder mounting seat 13 through a cylindrical pin, and the hydraulic cylinder 41 rotates along the horizontal direction on the oil cylinder mounting seat 13 with the cylindrical pin as the rotation shaft.

[0052] The driving mechanism 40 is provided in two groups, and the two groups of driving mechanisms 40 are centrally symmetrically arranged on the lower fixed disc 10, and each of the two groups of driving mechanisms 40 is used to drive the upper rotating disc 20 to rotate by 180° in the forward and reverse directions. The two groups of driving mechanisms 40 can synchronously drive the upper rotating disc 20 to rotate by 180° in the forward and reverse directions, or alternately drive the upper rotating disc 20 to rotate by 180° in the forward and reverse directions.

[0053] In use, the lower fixed disc 10 is fixedly connected to the carrying frame through bolts, at this time, the lower fixed disc 10 plays a role in connecting the U-turn device with the carrying frame on one hand, and supports the upper rotating disc 20 on the other hand. By the extension of the hydraulic cylinder 41, the upper rotating disc 20 is pushed to rotate by 18°, and after reaching the position, the hydraulic cylinder 41 is retracted, the pin 42 is removed and inserted into the next pin hole 24, and the hydraulic cylinder 41 is extended again. In this way, after 10 times of alternation, the bridge erecting machine can be turned by 180°.

[0054] The specific operation process is as follows:

[0055] 1. The hydraulic cylinders 41 of the two groups of driving mechanisms 40 slowly drive the upper rotating disc 20 to rotate relative to the lower fixed disc 10.

[0056] 2. In a single cycle, the upper rotating disc 20 rotates relative to the lower fixed disc 10 by 18°, and the driving time of the hydraulic cylinder 41 is designed to be 5 minutes.

[0057] 3. When the position of the next pin hole 24 of the upper rotating disc 20 reaches the initial driving position of the hydraulic cylinder 41, the hydraulic cylinder 41 is slightly pushed.

[0058] 4. After the hydraulic cylinder 41 reaches the position, the pin 42 is removed, the hydraulic cylinder 41 is retracted to the initial position, and the removed pin 42 is inserted into the hole.

[0059] 5. The insertion / removal of the pins 42 of the hydraulic cylinders 41 of the two sets of drive mechanisms 40 should be carried out in a staggered manner. Under no circumstances should the pins 42 of the hydraulic cylinders 41 of the two sets of drive mechanisms 40 be removed at the same time.

[0060] 6. Repeat this process 10 times to achieve the turning operation of the bridge erecting machine.

[0061] In some alternative embodiments: see Figures 3 to 6 As shown in the figure, this application embodiment provides an in-situ turning device applicable to various bridge erecting machines. The in-situ turning device also includes a beam-carrying bracket fixed to the bottom of the lower fixed plate 10, and a beam-carrying vehicle (not shown in the figure) is connected to the bottom of the beam-carrying bracket.

[0062] The beam support includes a double-line beam support 60 and a single-line beam support 50. Both the double-line beam support 60 and the single-line beam support 50 include an upper crossbeam 51 connected to the lower fixed plate 10, and a support leg 52 detachably connected to the bottom of the upper crossbeam 51. The upper crossbeam 51 and the support leg 52 are shared by the double-line beam support 60 and the single-line beam support 50.

[0063] Along the length of the upper crossbeam 51, a first mounting seat is fixed at both ends of the upper crossbeam 51, and two second mounting seats are located between the two first mounting seats and fixed to the upper crossbeam 51. Both the first and second mounting seats are used to connect the support legs 52. When the support legs 52 are connected to the first mounting seats, a double-line beam support bracket 60 can be formed; when the support legs 52 are connected to the second mounting seats, a single-line beam support bracket 50 can be formed.

[0064] The span between the two legs 52 on the single-line beam support 50 is smaller than the span between the two legs 52 on the double-line beam support 60. Both the double-line beam support 60 and the single-line beam support 50 also include a lower crossbeam 53. The length of the lower crossbeam 53 of the double-line beam support 60 is greater than the length of the lower crossbeam 53 of the single-line beam support 50. At least two legs 52 are symmetrically connected to the top of each lower crossbeam 53.

[0065] The bottom of the double-line beam-carrying bracket 60 is equipped with two beam-carrying vehicles arranged side by side, while the bottom of the single-line beam-carrying bracket 50 is equipped with one beam-carrying vehicle. The top of a single lower crossbeam 53 is connected to four support legs 52, which are fixed at the four corners of the lower crossbeam 53. In this embodiment, both the single-line beam-carrying bracket 50 and the double-line beam-carrying bracket 60 are provided in two sets, with the two sets of single-line beam-carrying brackets 50 or the two sets of double-line beam-carrying brackets 60 used to jointly support the turntable for in-situ turning.

[0066] Working principle

[0067] The embodiment of the application provides the U-turn device suitable for various bridge erecting machines, wherein the U-turn device suitable for various bridge erecting machines is provided with a U-turn turntable, the U-turn turntable comprises a lower fixed disc 10 and an upper rotating disc 20, the lower fixed disc 10 and the upper rotating disc 20 are coaxially connected in rotation, the lower fixed disc 10 is provided with a driving mechanism 40 for driving the upper rotating disc 20 to rotate; and the bridge erecting machine fixing seat 30 comprises two groups of parallel and spaced apart cushion beams 31 fixed on the top of the upper rotating disc 20, and the two groups of cushion beams 31 are each provided with a first locking bolt hole 32 and a second locking bolt hole 33 for connecting bridge erecting machine arms 70 of different widths.

[0068] Therefore, the U-turn device suitable for various bridge erecting machines is provided with the two groups of parallel and spaced apart cushion beams 31 on the top of the upper rotating disc 20, and the two groups of cushion beams 31 are each provided with the first locking bolt hole 32 and the second locking bolt hole 33 for connecting the bridge erecting machine arms 70 of different widths. The first locking bolt hole 32 and the second locking bolt hole 33 can be adapted to and fixed with single-line bridge erecting machines and double-line bridge erecting machines of different tonnages and different bridge erecting machine arm 70 widths. After the bridge erecting machine arms 70 of the single-line bridge erecting machine or the double-line bridge erecting machine are fixedly connected with the cushion beams 31 through the first locking bolt hole 32 or the second locking bolt hole 33, the upper rotating disc 20 can be driven to rotate through the driving mechanism 40 on the lower fixed disc 10, so that the U-turn of 180 degrees of the bridge erecting machine is realized.

[0069] In the description of the application, it should be noted that the positions or position relationships indicated by the terms "upper", "lower" and the like are based on the positions or position relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meanings of the above terms in the application can be understood according to the specific circumstances.

[0070] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0071] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above embodiments are illustrative, and not restrictive, of the scope of the application.

Claims

1. A device for turning a vehicle in place suitable for use with a variety of bridge machines, characterized in that, The utility model relates to a kind of in-situ U-turn devices for multiple bridge machines, including: In-situ U-turn rotary disc, the in-situ U-turn rotary disc includes lower fixed disc (10) and upper rotating disc (20), and lower fixed disc (10) and upper rotating disc (20) are coaxially connected, and drive mechanism (40) for driving upper rotating disc (20) rotation is equipped on lower fixed disc (10); Bridge machine fixed seat (30), the bridge machine fixed seat (30) includes two groups of parallel and interval setting cushion beam (31) fixed on the top of upper rotating disc (20), and first locking bolt hole (32) and second locking bolt hole (33) for connecting different width bridge machine arm (70) are equipped on two groups of cushion beam (31).

2. The in-situ U-turn device for multiple bridge machines according to claim 1, wherein: The two ends of the cushion beam (31) are respectively provided with the first locking bolt hole (32) and the second locking bolt hole (33), and the distance between the two first locking bolt holes (32) located at adjacent ends on the two groups of cushion beams (31) is less than the distance between the two second locking bolt holes (33) located at adjacent ends on the two groups of cushion beams (31).

3. The in-situ U-turn device for multiple bridge machines according to claim 1 or 2, wherein: The top of the cushion beam (31) is fixedly connected with a rubber pad (34), the first locking bolt hole (32) and the second locking bolt hole (33) are both elongated holes, and the length direction of the first locking bolt hole (32) and the second locking bolt hole (33) is perpendicular to the length direction of the cushion beam (31).

4. The in-situ U-turn device for multiple bridge machines according to claim 1, wherein: The lower fixed disc (10) includes a lower mounting seat (11), and a rotating shaft assembly (12) fixedly connected to the top of the lower mounting seat (11), and the center position of the upper rotating disc (20) is provided with a rotating shaft mounting hole (25) connected with the rotating shaft assembly (12).

5. The in-situ U-turn device for multiple bridge machines according to claim 1, wherein: The upper rotating disc (20) includes an upper flange disc (21) and a lower flange disc (22) coaxially and intervally arranged, and the upper flange disc (21) and the lower flange disc (22) are fixedly connected through a plurality of spacer sleeves (23) with gradually increasing diameters; The edge of the upper flange disc (21) and the lower flange disc (22) is provided with a plurality of bolt holes (24) arranged in a circle, and the bolt holes (24) on the upper flange disc (21) and the lower flange disc (22) are in communication with each other.

6. The in-situ U-turn device for multiple bridge machines according to claim 5, wherein: The drive mechanism (40) includes a hydraulic cylinder (41) rotatably connected to the lower fixed disc (10), and the telescopic arm of the hydraulic cylinder (41) is connected with the bolt holes (24) on the upper flange disc (21) and the lower flange disc (22) through a bolt (42).

7. The in-situ U-turn device for multiple bridge machines according to claim 1, wherein: The derrick support frame further comprises a derrick support frame fixed at the bottom of the lower fixing disc (10), and the bottom of the derrick support frame is connected with a beam carrier. 8.The device for turning around in place suitable for multiple bridge machines according to claim 7, wherein: The derrick support frame comprises a double-line derrick support frame (60) and a single-line derrick support frame (50), and the double-line derrick support frame (60) and the single-line derrick support frame (50) each comprise an upper cross beam (51) connected with the lower fixing disc (10), and a support leg (52) detachably connected at the bottom of the upper cross beam (51). The two ends of the upper cross beam (51) are each fixed with a first mounting seat, and two second mounting seats are fixed at the upper cross beam (51) between the two first mounting seats, and the first mounting seat and the second mounting seat are each used for connecting the support leg (52). 9.The device for turning around in place suitable for multiple bridge machines according to claim 8, wherein: The double-line derrick support frame (60) and the single-line derrick support frame (50) further comprise a lower cross beam (53), the length of the lower cross beam (53) of the double-line derrick support frame (60) is greater than the length of the lower cross beam (53) of the single-line derrick support frame (50), and the top of the lower cross beam (53) is symmetrically connected with at least two support legs (52). 10.The device for turning around in place suitable for multiple bridge machines according to claim 9, wherein: The bottom of the double-line derrick support frame (60) is provided with two beam carriers arranged side by side, the bottom of the single-line derrick support frame (50) is provided with one beam carrier, the top of the lower cross beam (53) is connected with four support legs (52), and the four support legs (52) are respectively fixed at the four corner positions of the lower cross beam (53).

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