Rotating system and rotating method for converting longitudinal transportation into transverse transportation of precast beam

Abstract

The invention discloses a rotating system and method for converting longitudinal transportation into transverse transportation of a precast beam, and relates to the technical field of concrete precast beams, the rotating system comprises a longitudinal transportation device, a rotating transportation device, a transverse transportation device and a PLC control system which are arranged in sequence; the longitudinal conveying device is controlled by the PLC control system to convey the transversely-arranged precast beams front and back, when the precast beams reach the position of the rotary conveying device, the lifting table descends, the precast beams are placed on the rotary platform, the rotary platform is controlled by the PLC control system to rotate by 90 degrees, steering of the precast beams is achieved, and the precast beams are changed into longitudinal arrangement; and after steering is completed, the prefabricated beams arranged longitudinally are directly hoisted to the transverse conveying platform, and the prefabricated beams are conveyed to different beam fields through the transverse conveying platform. Through the arrangement, the stable transportation rhythm can be achieved, the running rhythm of the whole production line is met, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of precast concrete beams, and in particular to a rotation system and a rotation method for converting longitudinal transportation into transverse transportation of precast beams. Background Art

[0002] Prefabricated concrete precast beams are long and heavy; after prefabrication, they need to be transported to the beam yard for storage. Because of their long length, the current layout of production line A and beam yard B is as follows: production line A extends in the front-to-back direction, and beam yard B is equipped with multiple beams side by side and located on one side of prefabricated beam production line A, with its opening facing the direction of production line A; the placement direction of prefabricated beams in production line A is horizontal (i.e. Figure 1 The precast beams in beam plant B are placed in the longitudinal direction (i.e. Figure 1 This layout makes it impossible to directly transfer the precast beams from production line A to beam factory B for storage, and requires turning. The current beam lifting machines or cranes are generally used to lift and transfer precast beams, and cannot achieve turning.

[0003] At present, the steering method adopted is to achieve reversing in the air through the cooperation of multiple cranes. The aerial reversing method has the following problems: 1. The precast beams are long and heavy, and have poor stability during aerial steering, which can easily cause safety accidents; 2. Crane hoisting requires manual operation, which places high labor intensity on workers and has low efficiency; 3. Crane hoisting has a slow operating speed and cannot achieve a stable transportation rhythm, which affects the overall operating rhythm of the entire production line and leads to low production efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a rotation system and a rotation method for converting longitudinal transportation of precast beams to transverse transportation, so as to realize transverse and longitudinal turning of precast beams on the ground, reduce the labor intensity of workers, improve work efficiency, and at the same time realize a stable transportation rhythm, meet the operating rhythm of the entire production line, and improve production efficiency.

[0005] In order to achieve the above object, the technical solution of the present invention is:

[0006] The present invention discloses a rotating system for converting longitudinal transportation to transverse transportation of precast beams, comprising a longitudinal transportation device, a rotating transportation device, a transverse transportation device and a PLC control system which are arranged in sequence; the longitudinal transportation device comprises two longitudinal beam transport vehicles which are arranged side by side and can move forward and backward synchronously, and a lifting platform which is arranged on the longitudinal beam transport vehicles and is used to support the precast beams, and the drive system signals of the longitudinal beam transport vehicles and the lifting platform are connected to the PLC control system; the two longitudinal beam transport vehicles always keep synchronous operation, and the two lifting platforms are respectively supported on the left and right sides of the precast beams and drive the precast beams to move in the forward and backward directions and to move up and down; the rotating transportation device comprises a rotating platform rotatably installed between the two longitudinal beam transport vehicles and a rotating driving device which drives the rotating platform to rotate; the signals of the rotating driving device are connected to the PLC control system; the transverse transportation device comprises a transverse transportation platform which is arranged on one side of the longitudinal transportation device and can move forward and backward, and the transverse transportation platform moves between the entrances of different beam factories.

[0007] After adopting the above structure, the longitudinal transport device is controlled by the PLC control system to transport the transversely arranged prefabricated beams forward and backward. When reaching the position of the rotating transport device, the lifting platform descends and places the prefabricated beams on the rotating platform. The PLC control system controls the rotating platform to rotate 90° to realize the steering of the prefabricated beams, so that the prefabricated beams are arranged longitudinally. After the steering is completed, the longitudinally arranged prefabricated beams are directly hoisted onto the transverse transport platform, and the prefabricated beams are transported to different beam yards through the transverse transport platform. Through the above settings, the transverse and longitudinal steering of the prefabricated beams on the ground is realized, which reduces the labor intensity of workers and improves work efficiency. At the same time, a stable transportation rhythm can be achieved, which meets the operating rhythm of the entire production line and improves production efficiency.

[0008] Preferably, the longitudinal transport device also includes two longitudinal tracks that are arranged in parallel and extend forward and backward, and the distance between the two longitudinal tracks is not greater than the length of the prefabricated beam; the longitudinal beam transport vehicle is limitedly slidably installed on the longitudinal track; the longitudinal track is provided with a loading position and an unloading position, and the loading position and the unloading position are respectively provided with position sensors, and the position sensor signals are connected to the PLC control system; when the longitudinal beam transport vehicle is located at the loading position, the prefabricated beam is hoisted onto the lifting platform; when the longitudinal beam transport vehicle is located at the unloading position, the lifting platform descends and the prefabricated beam is placed on the rotating transport device. Through this arrangement, the transport track of the longitudinal beam transport vehicle is limited, and the loading position and the unloading position are set at the same time, the position accuracy of each position is guaranteed, automatic loading and unloading is realized, and a stable production rhythm is guaranteed.

[0009] Preferably, a support base is fixedly installed on the ground, the rotating platform is rotatably installed on the support base, and two longitudinal beam transport vehicles are symmetrically arranged on both sides of the support base. Through this arrangement, when the prefabricated beam is placed on the rotating platform, the left and right sides are stably supported, avoiding the prefabricated beam from being deflected or even falling due to uneven support force.

[0010] Preferably, the rotating platform includes a rotating seat rotatably mounted on the supporting seat and cantilever beams symmetrically arranged on the left and right sides of the rotating seat and extending to both sides; the rotating driving device includes a rotating beam transport vehicle fixed on the suspended side of the cantilever beam, and the rotating beam transport vehicle performs a circular operation around the supporting seat; the rotating beam transport vehicles on the two cantilever beams run in the same direction. Through this arrangement, the deadweight of the rotating platform can be reduced as much as possible to ensure stable transportation efficiency.

[0011] Preferably, the rotary transport device also includes a circular track with the support seat as the center, and the rotary beam transport vehicle is limitedly and rollingly installed on the circular track; the circular track is provided with an initial position and an end position; when in the initial position and the end position, the rotary platform is at a rotation angle of 90°; position sensors are respectively provided on the initial position and the end position, and the position sensor signals are connected to the PLC control system; when in the initial position, the precast beam is placed horizontally; when in the end position, the precast beam is placed longitudinally. Through this setting, the transport track of the rotary beam transport vehicle is limited, and the initial position and the end position are set at the same time, the position accuracy of each position is guaranteed, automatic loading and unloading is realized, and a stable production rhythm is guaranteed.

[0012] Preferably, there are two initial positions and two end positions. Through this arrangement, the time of idling of the rotating platform can be reduced as much as possible, thereby improving production efficiency and reducing energy consumption.

[0013] Preferably, it also includes a supporting crossbeam; the supporting crossbeam includes a beam body extending left and right and in a long strip shape, and the beam body provides a stable support surface for the precast beam; one end of the beam body is provided with a longitudinal support seat and a rotating support seat, and the other end is also provided with a longitudinal support seat and a rotating support seat; two lifting platforms are respectively supported on the two longitudinal support seats, and two rotating beam transport vehicles are respectively supported on the two rotating support seats; the longitudinal support seat includes a fixed seat arranged on the front and rear sides of the beam body; each lifting platform is provided with two lifting columns, and the two lifting columns are respectively supported on the fixed seats on the front and rear sides of the beam body. Through this arrangement, it can be avoided that the longitudinal transport device and the rotating transport device directly contact the precast beam, causing stress concentration at the contact position and causing damage to the precast beam; by providing the supporting crossbeam, stable support can be provided for the precast beam.

[0014] Preferably, the transverse transport platform includes two transverse beam transport vehicles that move forward and backward, the signals of the two transverse beam transport vehicles are connected to the PLC control system, the two transverse beam transport vehicles are arranged front and back, the distance between them is always kept constant and is less than the length of the precast beam, and the two ends of the precast beam are supported on the two transverse beam transport vehicles respectively. Through this arrangement, a stable supporting force can be provided to the precast beam, and longitudinal movement can be achieved at the same time.

[0015] Preferably, the transverse transport device also includes a transverse track extending forward and backward, and two transverse beam transport vehicles are installed on the transverse track with front and rear limit rolling; a position sensor is set on the transverse track corresponding to the crane hoisting position of the beam factory, and the position sensor signal is connected to the PLC control system. Through this setting, the transportation track of the transverse beam transport vehicle is limited, and the crane hoisting position is set at the same time, which can realize the automatic start of the crane to hoist the prefabricated beam, ensuring the production rhythm.

[0016] A method for rotating precast beams by utilizing the above-mentioned rotating system for converting longitudinal transportation to transverse transportation of precast beams, comprising the following steps: S1: at the loading position, the supporting beam is placed on the longitudinal transportation device, and the beam lifting machine or the crane directly lifts the precast beam onto the supporting beam; S2: the longitudinal transportation device drives the supporting beam and the precast beam to move forward and backward together; when arriving at the unloading position, the lifting platform is lowered, and the supporting beam and the precast beam are transferred to the rotating transportation device together, and the rotating beam transport vehicle is in the initial position at this time; S3: the rotating beam transport vehicle starts, driving the rotating platform to rotate 90°, and when arriving at the end position, the beam lifting machine or the crane directly lifts the precast beam away; S4: the rotating beam transport vehicle starts, driving the rotating platform to rotate 90°, the rotating beam transport vehicle starts and reaches the initial position, the lifting platform rises, reconnects the supporting beam, and the longitudinal transportation device drives the supporting beam to return to the loading position.

[0017] Through the setting of this method, the precast beams can be turned horizontally and vertically on the ground, and the whole process is automated, which reduces the labor intensity of workers and improves work efficiency. At the same time, a stable transportation rhythm can be achieved, meeting the operating rhythm of the entire production line and improving production efficiency.

[0018] After adopting the above technical solution, the beneficial effects of the present invention are:

[0019] The present invention provides a rotation system and a rotation method for converting longitudinal transportation of precast beams to transverse transportation, which solves the technical problems in the prior art that the operation is cumbersome and the production rhythm cannot be guaranteed when the precast beams are converted in the transverse and longitudinal directions between the production line and the beam yard. The present invention realizes the transverse and longitudinal turning of precast beams on the ground and adopts automated operation throughout the process, which reduces the labor intensity of workers and improves work efficiency. At the same time, a stable transportation rhythm can be achieved, which meets the operating rhythm of the entire production line and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a rotating system for converting longitudinal transportation to transverse transportation of prefabricated beams according to the present invention;

[0021] Figure 2 yes Figure 1 A schematic diagram of the structure of the rotating transport device;

[0022] Figure 3 yes Figure 2 A schematic diagram of the structure of the support beam installed in the central rotating transport device;

[0023] Figure 4 It is a schematic diagram of the structure of the supporting beam;

[0024] Figure 5 It is a schematic diagram of the structure of the longitudinal beam transport vehicle;

[0025] Figure 6 It is a structural schematic diagram of the transverse beam transport vehicle;

[0026] Figure 7 yes Figure 2 A partial enlarged view of C in the middle.

[0027] In the figure, 1. longitudinal transport device, 11. longitudinal track, 12. longitudinal beam transport vehicle, 121. lifting column, 2. rotating transport device, 21. support seat, 22. rotating drive device, 231. rotating seat, 232. cantilever beam, 24. circular track, 3. transverse transport device, 31. transverse beam transport vehicle, 32. transverse track, 4. supporting beam, 41. beam body, 411. longitudinal support seat, 412. rotating support seat. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] The orientations mentioned in this specification are based on the orientations of the rotation system and rotation method for converting longitudinal transportation to transverse transportation of prefabricated beams of the present invention during normal operation. The orientations during storage and transportation are not limited and only represent relative position relationships, not absolute position relationships.

[0030] like Figure 1 As shown, a rotating system for converting longitudinal transportation of precast beams to transverse transportation is arranged between a precast beam production line A and a beam factory B; wherein the production line A extends in the front-to-back direction, and the beam factory B is provided with a plurality of beams arranged side by side and located on one side of the precast beam production line A, with its opening direction facing the direction of the production line A; in this embodiment, there are two beam factories B. The placement direction of the precast beams in the production line A is transverse (i.e., placed in the left-right direction in the figure); and the placement direction of the precast beams in the beam factory B is longitudinal (i.e., placed in the front-to-back direction in the figure).

[0031] A rotation system for converting longitudinal transportation to transverse transportation of prefabricated beams comprises a longitudinal transportation device 1, a rotation transportation device 2 and a transverse transportation device 3 which are arranged in sequence and a PLC control system which is signal-connected to the three.

[0032] like Figure 1 and Figure 5As shown together, the longitudinal transport device 1 includes two longitudinal beam transport vehicles 12 that can move forward and backward synchronously and a lifting platform arranged on the longitudinal beam transport vehicles 12 and used to support the precast beams. The lifting platforms of the two longitudinal beam transport vehicles 12 are respectively supported on the left and right sides of the precast beams and drive the precast beams to move forward and backward and up and down. The drive system signals of the longitudinal beam transport vehicle 12 and the lifting platform are connected to the PLC control system. The longitudinal beam transport vehicle 12 is a heavy-duty trolley that can automatically carry the materials on it to realize automatic transportation.

[0033] In order to limit the running track of the longitudinal beam transport vehicle 12 , the longitudinal transport device 1 further comprises two longitudinal rails 11 which are arranged in parallel and extend forward and backward, and the longitudinal beam transport vehicle 12 is slidably installed on the longitudinal rails 11 in a limited manner.

[0034] In this embodiment, two longitudinal rails 11 are arranged on the left and right sides of the end of production line A and continue to extend forward along the end of production line A. The distance between the two longitudinal rails 11 is not greater than the length of the precast beam, thereby ensuring that the precast beam can be smoothly transported. The two lifting platforms on the two longitudinal beam transport vehicles 12 are respectively supported at both ends of the precast beam; the lifting platforms in this embodiment adopt a hydraulic lifting structure, and in actual applications, pneumatic lifting or electric lifting structures can also be used. The two longitudinal beam transport vehicles 12 always maintain synchronous operation, so that the precast beams on them are transported horizontally.

[0035] After the precast beam comes down from the production line A, it can be hoisted to the top of the longitudinal transport device 1 by a beam lifting machine or a crane, and its two ends are respectively supported on the lifting platforms on the corresponding sides.

[0036] The longitudinal track 11 is provided with a loading position and an unloading position, and the loading position and the unloading position are respectively provided with position sensors, and the position sensor signals are connected to the PLC control system. When the longitudinal beam transport vehicle 12 is located at the loading position, the beam lifting machine or the crane is started to lift the prefabricated beam onto the lifting platform; when the longitudinal beam transport vehicle 12 is located at the unloading position, the lifting platform descends and the prefabricated beam is placed on the rotating transport device 2.

[0037] like Figure 1 , Figure 2 and Figure 3As shown together, the rotating transport device 2 includes a rotating platform rotatably installed between two longitudinal beam transport vehicles 12 and a rotating drive device 22 driving the rotating platform to rotate; the signal of the rotating drive device 22 is connected to the PLC control system. The longitudinal transport device 1 transports the precast beam to the top of the rotating platform, and then the lifting platform descends, the precast beam falls onto the rotating platform, and the rotating drive device 22 drives the rotating platform to rotate to realize the steering of the precast beam. The installation method of the rotating platform is: a support seat 21 is fixedly installed on the ground, the rotating platform is rotatably installed on the support seat 21, and the two longitudinal beam transport vehicles 12 are symmetrically arranged on both sides of the support seat 21. This design ensures that the left and right positions of the lifting platform are symmetrical when placing the precast beam on the rotating platform, avoiding uneven support force of the lifting platform on the precast beam, causing damage to the precast beam or the precast beam tilting and falling from the rotating platform.

[0038] The rotating platform can adopt a disc structure or other shapes. In order to reduce the overall weight of the rotating platform in this embodiment, the rotating platform includes a rotating base 231 rotatably mounted on the support base 21 and cantilever beams 232 symmetrically arranged on the left and right sides of the rotating base 231 and extending to both sides. The rotating drive device 22 includes a rotating beam transport vehicle fixed on the suspended side of the cantilever beam 232, and the rotating beam transport vehicle performs a circular operation around the support base 21. The rotating beam transport vehicles on the two cantilever beams 232 have the same running direction, and the two rotating beam transport vehicles are connected as a whole by the two cantilever beams 232, so as to ensure their synchronous rotation. The two ends of the precast beam are respectively supported on the two rotating beam transport vehicles. Through the operation of the rotating beam transport vehicle, the rotating platform is driven to rotate to realize the steering of the precast beam.

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, in order to limit the running track of the rotating beam transport vehicle, the rotating transport device 2 also includes a circular track 24 set with the support seat 21 as the center, and the rotating beam transport vehicle is limited and rollingly installed on the circular track 24. An initial position and an end position are set on the circular track 24, and the initial position and the end position are at a rotation angle of 90°; position sensors are respectively set on the initial position and the end position, and the position sensor signals are connected to the PLC control system. When the rotating beam transport vehicle is located at the initial position, the longitudinal beam transport vehicle 12 is located at the unloading position, and the lifting platform descends to place the precast beams on the rotating transport device 2, and the precast beams are placed horizontally; when the rotating beam transport vehicle is located at the end position, the precast beams are placed longitudinally, that is, Figure 1 The front and rear directions are set in the middle, at this time, the beam lifting machine or the crane is started to lift the prefabricated beam onto the horizontal transport device 3.

[0040] When the rotation driving device 22 controls the rotating platform to always rotate in the same direction, in order to reduce rotation loss, two initial positions and two end positions are set, thereby ensuring that the rotation angle of the rotating platform controlled by the rotation driving device 22 is 90° each time.

[0041] like Figure 2 and Figure 4 As shown together, as an improvement of the above-mentioned embodiment, a rotating system for longitudinal transportation of precast beams to lateral transportation also includes a supporting beam 4; the supporting beam 4 is converted between the longitudinal transportation device 1 and the rotating transportation device 2. The supporting beam 4 includes a beam body 41 extending left and right and in a long strip shape, and the beam body 41 provides a stable supporting surface for the precast beam; one end of the beam body 41 is provided with a longitudinal support seat 411 and a rotating support seat 412, and the other end is also provided with a longitudinal support seat 411 and a rotating support seat 412; two lifting platforms are respectively supported on the two longitudinal support seats 411, and two rotating beam transport vehicles are respectively supported on the two rotating support seats 412. In order to achieve stable support for the beam body 41, the longitudinal support seat 411 includes a fixed seat arranged on the front and rear sides of the beam body 41; each lifting platform is provided with two lifting columns 121, and the two lifting columns 121 are respectively supported on the fixed seats on the front and rear sides of the beam body. Lifting ears are arranged at both ends of the supporting beam 4.

[0042] The four lifting columns 121 provide stable support to the support beam 4 to prevent shaking. The support beam 4 is provided to prevent the longitudinal transport device 1 and the rotary transport device 2 from directly contacting the precast beam, which would cause concentrated force and affect the quality of the precast beam.

[0043] When loading, the supporting beam 4 is placed on the longitudinal transport device 1, and the beam lifting machine or the crane directly lifts the precast beam onto the supporting beam 4, and the longitudinal transport device 1 drives the supporting beam 4 and the precast beam to move forward and backward together; when arriving at the unloading position, the lifting platform is lowered, and the supporting beam 4 and the precast beam are transferred to the rotating transport device 2 together, and the rotating beam transport vehicle is in the initial position at this time; the rotating beam transport vehicle starts, driving the rotating platform to rotate 90°, and when it reaches the end position, the beam lifting machine or the crane directly lifts the precast beam away; the rotating beam transport vehicle starts, driving the rotating platform to rotate 90°, the rotating beam transport vehicle starts and reaches the initial position, the lifting platform rises, and reconnects the supporting beam 4, and the longitudinal transport device 1 drives the supporting beam 4 back to the loading position.

[0044] As an optimization of this embodiment, a universal roller may be selectively arranged between the bottom of the cantilever beam 232 and the ground, and the universal roller is used to increase the support point, thereby reducing the stress deformation of the cantilever beam 232.

[0045] like Figure 1 and Figure 6As shown, the transverse transport device 3 includes a transverse transport platform that is arranged on one side of the longitudinal transport device 1 and can move forward and backward, and the transverse transport platform moves between the entrances of different beam factories B. In this embodiment, the transverse transport platform includes two transverse beam transport vehicles 31 that move forward and backward. The signals of the two transverse beam transport vehicles 31 are connected to the PLC control system. The two transverse beam transport vehicles 31 are arranged front and back, and the distance between them always remains unchanged and is less than the length of the precast beam. The two ends of the precast beam are supported on the two transverse beam transport vehicles 31 respectively. After the rotating transport device 2 drives the precast beam to be converted from the transverse direction to the longitudinal direction, the precast beam is lifted from the rotating transport device 2 to the transverse transport device 3 by a beam lifting machine or a crane. The transverse transport device 3 transfers the precast beam along the direction of the precast beam (front and back direction) to the crane hoisting position of the next beam yard B, and the precast beam hoisting device is stacked in the beam yard by the crane.

[0046] The transverse transport device 3 also includes a transverse track 32 extending forward and backward, and two transverse beam transport vehicles 31 are installed on the transverse track 32 with front and rear limit positions. Position sensors are set on the transverse track 32 corresponding to the crane hoisting position of the beam factory B. The position sensor signal is connected to the PLC control system. When the transverse beam transport vehicle 31 reaches the crane hoisting position of a beam factory B, the transverse beam transport vehicle 31 stops running.

[0047] A method for rotating precast beams by utilizing the above-mentioned rotating system for converting longitudinal transportation to transverse transportation of precast beams, comprising the following steps: S1: at the loading position, the supporting beam is placed on the longitudinal transportation device, and the beam lifting machine or the crane directly lifts the precast beam onto the supporting beam; S2: the longitudinal transportation device drives the supporting beam and the precast beam to move forward and backward together; when arriving at the unloading position, the lifting platform is lowered, and the supporting beam and the precast beam are transferred to the rotating transportation device together, and the rotating beam transport vehicle is in the initial position at this time; S3: the rotating beam transport vehicle starts, driving the rotating platform to rotate 90°, and when arriving at the end position, the beam lifting machine or the crane directly lifts the precast beam away; S4: the rotating beam transport vehicle starts, driving the rotating platform to rotate 90°, the rotating beam transport vehicle starts and reaches the initial position, the lifting platform rises, reconnects the supporting beam, and the longitudinal transportation device drives the supporting beam to return to the loading position.

[0048] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A rotation system for converting longitudinal transport to transverse transport of prefabricated beams, characterized in that: It includes a longitudinal transport device, a rotating transport device, a transverse transport device and a PLC control system which are arranged in sequence; The longitudinal transport device comprises two longitudinal beam transport vehicles arranged side by side and capable of synchronously moving forward and backward, and a lifting platform arranged on the longitudinal beam transport vehicles and used to support the precast beams. The drive system signals of the longitudinal beam transport vehicles and the drive system signals of the lifting platform are connected to the PLC control system; the two longitudinal beam transport vehicles always keep synchronous operation, and the two lifting platforms are respectively supported on the left and right sides of the precast beams and drive the precast beams to move forward and backward and up and down; The rotary transport device comprises a rotary platform rotatably mounted between the two longitudinal beam transport vehicles and a rotary drive device driving the rotary platform to rotate; the rotary drive device is connected to the PLC control system by signal; The transverse transport device comprises a transverse transport platform which is arranged on one side of the longitudinal transport device and can move forward and backward, and the transverse transport platform moves between the entrances of different beam factories.

2. The rotation system for converting longitudinal transportation to transverse transportation of prefabricated beams according to claim 1, characterized in that: The longitudinal transport device also includes two longitudinal rails arranged in parallel and extending forward and backward, and the distance between the two longitudinal rails is not greater than the length of the prefabricated beam; the longitudinal beam transport vehicle is limitedly slidably installed on the longitudinal rails; the longitudinal rails are provided with a loading position and an unloading position, and the loading position and the unloading position are respectively provided with position sensors, and the position sensor signals are connected to the PLC control system; When the longitudinal beam transport vehicle is located at the loading position, the prefabricated beam is hoisted onto the lifting platform; when the longitudinal beam transport vehicle is located at the unloading position, the lifting platform descends and the prefabricated beam is placed on the rotating transport device.

3. The rotation system for converting longitudinal transportation to transverse transportation of prefabricated beams according to claim 1 is characterized in that: A support base is fixedly installed on the ground, the rotating platform is rotatably installed on the support base, and two longitudinal beam transport vehicles are symmetrically arranged on both sides of the support base.

4. The rotation system for converting longitudinal transportation to transverse transportation of prefabricated beams according to claim 3 is characterized in that: The rotating platform includes a rotating seat rotatably mounted on the supporting seat and cantilever beams symmetrically arranged on the left and right sides of the rotating seat and extending on both sides; the rotating driving device includes a rotating beam transport vehicle fixed on the suspended side of the cantilever beam, and the rotating beam transport vehicle runs in a circle around the supporting seat; the rotating beam transport vehicles on the two cantilever beams run in the same direction.

5. The rotation system for converting longitudinal transportation to transverse transportation of prefabricated beams according to claim 4, characterized in that: The rotary transport device also includes a circular track with the support seat as the center, and the rotary beam transport vehicle is limitedly and rollingly installed on the circular track; the circular track is provided with an initial position and an end position; When in the initial position and the end position, the rotating platform is at a rotation angle of 90°; position sensors are respectively provided at the initial position and the end position, and the position sensor signals are connected to the PLC control system; When in the initial position, the precast beam is placed horizontally; when in the final position, the precast beam is placed longitudinally.

6. The rotation system for converting longitudinal transportation to transverse transportation of prefabricated beams according to claim 5, characterized in that: There are two initial bits and two end bits.

7. A rotation system for converting longitudinal transportation to transverse transportation of precast beams according to any one of claims 1 to 6, characterized in that: It also includes a supporting crossbeam; the supporting crossbeam includes a beam body extending left and right and in a long strip shape, and the beam body provides a stable supporting surface for the prefabricated beam; A longitudinal support seat and a rotating support seat are arranged at one end of the beam body, and a longitudinal support seat and a rotating support seat are also arranged at the other end; two lifting platforms are respectively supported on the two longitudinal support seats, and two rotating beam transport vehicles are respectively supported on the two rotating support seats; the longitudinal support seat includes fixed seats arranged on the front and rear sides of the beam body; two lifting columns are arranged on each lifting platform, and the two lifting columns are respectively supported on the fixed seats on the front and rear sides of the beam body.

8. The rotation system for converting longitudinal transportation to transverse transportation of prefabricated beams according to claim 1, characterized in that: The transverse transport platform includes two transverse beam transport vehicles that move forward and backward. The signals of the two transverse beam transport vehicles are connected to the PLC control system. The two transverse beam transport vehicles are arranged front and back, and the distance between them always remains unchanged and is less than the length of the prefabricated beam. The two ends of the prefabricated beam are respectively supported on the two transverse beam transport vehicles.

9. The rotating system for converting longitudinal transportation to transverse transportation of prefabricated beams according to claim 1, characterized in that: The transverse transport device also includes a transverse track extending forward and backward, and the two transverse beam transport vehicles are installed on the transverse track with front and rear limit rolling; a position sensor is set on the transverse track corresponding to the crane hoisting position of the beam factory, and the position sensor signal is connected to the PLC control system.

10. A method for rotating precast beams using the rotation system for converting longitudinal transport to transverse transport of precast beams according to claim 7, characterized in that: The following steps are involved: S1: When loading, the supporting beam is placed on the longitudinal transport device, and the beam lifting machine or crane directly lifts the precast beam onto the supporting beam; S2: The longitudinal transport device drives the supporting beam and the precast beam to move forward and backward together; when arriving at the unloading position, the lifting platform is lowered, and the supporting beam and the precast beam are transferred to the rotating transport device together. At this time, the rotating beam transport vehicle is in the initial position; S3: The rotating beam transporter starts, driving the rotating platform to rotate 90°. When it reaches the end position, the beam lifting machine or the crane directly lifts the precast beam away; S4: The rotating beam transport vehicle starts, driving the rotating platform to rotate 90°. The rotating beam transport vehicle starts and reaches the initial position. The lifting platform rises and reconnects the supporting beam. The longitudinal transport device drives the supporting beam back to the loading position.

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