A transfer device for prefabricated box girder

Abstract

The utility model discloses a transfer device of prefabricated box girder relates to highway construction technical field, and includes cross rail module, vertical rail module, first mobile pedestal and second mobile pedestal, first mobile pedestal includes the first box, second box and third box of fixed connection of n -shaped, and is equipped with the insertion slot body for accommodating second mobile pedestal between first box and second box, in the cross rail module and vertical rail module intersection position, second mobile pedestal can be inserted into insertion slot body or from insertion slot body laterally draws out laterally, is used for the transfer of prefabricated box girder between first mobile pedestal and second mobile pedestal. The utility model utilizes the first mobile pedestal and second mobile pedestal that can interlock and remove path each other vertical, realizes the turning transport to prefabricated box girder, i.

Description

Technical Field

[0001] This utility model relates to the field of highway construction technology, specifically to a transfer device for precast box girders. Background Technology

[0002] Box girders are common components in highway construction, and are generally divided into steel structure box girders and reinforced concrete box girders. Among them, reinforced concrete box girders include two forming methods: precast and cast-in-place.

[0003] During the precast molding process, once the box girder inside the precast mold reaches a certain hardness, it is demolded, transported, and cured until the concrete is completely hardened. The transport of the precast box girder is usually achieved by a gantry crane and a moving platform; that is, after the mold is opened, the gantry crane lifts the precast box girder and places it on the moving platform; then the moving platform transports the precast box girder into the curing chamber along the track.

[0004] Precast molds and curing chambers are usually not laid out in a straight line, but rather in an L-shape to suit the rectangular shape of the processing workshop. Therefore, the moving platform needs to make turns during the transportation of precast box girders.

[0005] In traditional technology, a turntable is placed at the bend in the conveyor track. The turntable's upper surface has a U-shaped track. After the moving platform travels onto the U-shaped track, the turntable rotates, aligning the U-shaped track with the desired conveyor track, thus achieving track change. This method requires the moving platform and the precast box girder to rotate synchronously. The precast box girder has significant weight and inertia during rotation, which exerts a large bending moment (through the moving wheels at the bottom of the moving platform) on the U-shaped track, causing it to bend and deform, reducing its service life. After bending deformation, the moving platform cannot travel smoothly on the U-shaped track. Utility Model Content

[0006] In order to overcome the problem in the above-mentioned background technology that "the precast box girder will exert a large bending moment on the zigzag track during the rotational turning process", this utility model provides a transfer device for precast box girders.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is:

[0008] A transfer device for precast box girders includes a transverse rail module, a longitudinal rail module, a first movable platform, and a second movable platform. The transverse rail module includes two parallel first rails, and the longitudinal rail module includes two parallel second rails. The transverse rail module and the longitudinal rail module are perpendicularly intersecting each other. The first movable platform is connected to the transverse rail module and can reciprocate along the length of the first rails. The second movable platform is connected to the longitudinal rail module and can reciprocate along the length of the second rails. The top surface of the first movable platform is provided with a plurality of first jacks for supporting the precast box girder, and the top surface of the second movable platform is provided with a plurality of... The second jack supports the precast box girder; the precast box girder can be selectively pressed onto the top of the first jack and / or the top of the second jack; the first movable platform includes a first box, a second box, and a third box fixedly connected in an n-shape; the first box and the second box are arranged parallel to each other, and a slot for accommodating the second movable platform is provided between the first box and the second box; at the intersection of the transverse rail module and the longitudinal rail module, the second movable platform can be laterally inserted into the slot or laterally pulled out from the slot for the transfer of the precast box girder between the first movable platform and the second movable platform.

[0009] As a further optimization of this utility model, when the first movable platform is located at the intersection of the horizontal rail module and the vertical rail module, the lateral opening of the insertion slot points towards the vertical rail module.

[0010] As a further optimization of this utility model, the first box, the second box, and the second track are arranged in parallel to each other; the end of the first box away from the middle of the second track is connected to the third box; the end of the second box away from the middle of the second track is connected to the third box.

[0011] As a further optimization of this utility model, a first pressure sensor is installed at the end face of the first movable platform, and a column for pressing the first pressure sensor is vertically inserted between the two first tracks; the top of the column is not higher than the top surface of the first movable platform.

[0012] As a further optimization of this utility model, a second pressure sensor is installed on the outer wall of the second movable platform, and the third housing can press against the second pressure sensor.

[0013] As a further optimization of this utility model, the first jack is provided on both sides of the insertion slot; the first jack is connected to the top surface of the first box and the top surface of the second box in pairs.

[0014] As a further optimization of this utility model, the bottom surface of the first movable platform is provided with a plurality of rotatable first movable wheels, the first movable wheels are provided in two rows and are respectively pressed onto two first tracks; the cylindrical surface of the first movable wheel is provided with a first annular groove, and the first track is engaged in the first annular groove.

[0015] As a further optimization of this utility model, the first movable wheels are arranged in pairs on both sides of the insertion slot.

[0016] As a further optimization of this utility model, the bottom surface of the second movable platform is provided with a number of rotatable second movable wheels, the second movable wheels are provided in two rows and are respectively pressed onto two second tracks; the cylindrical surface of the second movable wheel is provided with a second annular groove, and the second track is engaged in the second annular groove.

[0017] As a further optimization of this utility model, the horizontal rail module further includes a first track plate buried in the ground, and the first track is fixedly connected to the first track plate; the vertical rail module further includes a second track plate buried in the ground, and the second track is fixedly connected to the second track plate.

[0018] In summary, this utility model has at least one of the following advantages:

[0019] (1) This utility model utilizes a first moving platform and a second moving platform that can be interlocked and whose moving paths are perpendicular to each other to realize the turning transportation of precast box girders. That is, the precast box girders are translated rather than rotated at the turning position, avoiding the use of turntables and T-shaped tracks, thereby avoiding the generation of bending moment and the problem of bending deformation of T-shaped tracks.

[0020] (2) When the precast box girder is placed above the insertion slot support, the second moving platform is inserted into the insertion slot and the second jack is used to lift the precast box girder, which can transfer the load of the precast box girder from the first moving platform to the second moving platform. Then the second moving platform carrying the precast box girder moves laterally and is pulled out from the insertion slot, completing the convenient transfer of the precast box girder between the first moving platform and the second moving platform. The first moving platform and the second moving platform do not need to rotate, which reduces the risk of derailment due to eccentric load (eccentric load comes from the weight of the precast box girder).

[0021] (3) When the second moving platform enters between the two support frames, the output shaft of the second jack retracts, and the height of the precast box girder decreases and it is placed on the support frame. Then the output shaft of the jack retracts further until it separates from the bottom surface of the precast box girder. At this time, the second moving platform can smoothly drive out between the two support frames, realizing the convenient removal of the precast box girder.

[0022] (4) The horizontal rail module and the vertical rail module are arranged perpendicularly to each other, which can be adapted to the outer edge of the rectangular processing workshop and the layout of the prefabricated mold and the curing room, so that the setting position is as compact as possible, thereby improving the space utilization rate in the processing workshop. Attached Figure Description

[0023] The present application will be further explained below with reference to the accompanying drawings:

[0024] Figure 1 This is a top view of the overall structure of this utility model;

[0025] Figure 2 A top view of the structure at the perpendicular intersection of the horizontal and vertical rail modules;

[0026] Figure 3 A top view of the structure of the horizontal rail module and the first movable platform.

[0027] Figure 4 A top view of the internal structure of the first movable platform;

[0028] Figure 5 A top view of the longitudinal rail module and the second moving platform structure;

[0029] Figure 6 Top view of the second movable platform inserted into the insertion slot;

[0030] Figure 7 Top view of the first moving wheel being secured to the first track;

[0031] Figure 8 A top view of the second pressure sensor being pressed into the third housing.

[0032] Figure 9 Right view schematic diagram of the connection structure between the first track slab and the first track;

[0033] Figure 10 Top view of the second track being engaged with the second moving wheel;

[0034] Figure 11 This is a front view schematic diagram of the connection structure between the second track slab and the second track.

[0035] Figure 12 A top view of the first moving platform as it travels to the intersection of the horizontal and vertical rail modules;

[0036] Figure 13 A top view of the precast box girder as the load is transferred from the first moving platform to the second moving platform;

[0037] Figure 14 A top view of the second movable platform being pulled out of the insertion slot.

[0038] Figure 15 A top view of the longitudinal rail module and curing chamber structure;

[0039] Figure 16 A top-view diagram showing the layout of the precast molds and curing room within the processing workshop;

[0040] Figure 17 A front view diagram showing the second movable platform inserted between the two support frames.

[0041] Explanation of reference numerals in the attached figures:

[0042] In the picture,

[0043] 1. Horizontal rail module; 11. First rail; 110. Cross gap; 111. Square support rail; 12. First rail plate;

[0044] 2. Longitudinal rail module; 21. Second rail; 22. Second rail plate;

[0045] 3. First movable platform; 3001. First frame; 301. First housing; 302. Second housing; 303. Third housing; 304. Insertion slot; 31. First jack; 32. First moving wheel; 33. First pressure sensor; 34. Column;

[0046] 4. Second movable platform; 41. Second jack; 42. Second movable wheel; 43. Second pressure sensor;

[0047] 5. Precast box girders;

[0048] 6. Ground;

[0049] 7. Curing room; 71. Support frame; 72. Cover; 73. Embedded block;

[0050] 8. Precast molds;

[0051] 9. Processing workshop. Detailed Implementation

[0052] Based on the above-described structural features of this application, the implementation methods of this application will be further described as follows:

[0053] Reference Figure 1 and Figure 16 This embodiment provides a transfer device for precast box girders, including a transverse rail module 1, a longitudinal rail module 2, a first movable platform 3, and a second movable platform 4. The transverse rail module 1 extends and is installed near the precast mold 8 of the precast box girder 5, and the longitudinal rail module 2 extends and is installed inside the curing chamber 7. This utility model is used to realize the transfer of the precast box girder 5 between the position near the precast mold 8 and the position of the curing chamber 7.

[0054] Reference Figure 1 , Figure 2 and Figure 16 The transverse rail module 1 includes two parallel first rails 11, and the longitudinal rail module 2 includes two parallel second rails 21. The transverse rail module 1 and the longitudinal rail module 2 are perpendicularly intersecting, that is, the first rails 11 and the second rails 21 are perpendicularly intersecting. The first movable platform 3 is connected to the transverse rail module 1 and can reciprocate along the length of the first rail 11, and the second movable platform 4 is connected to the longitudinal rail module 2 and can reciprocate along the length of the second rail 21. The processing workshop 9 is usually rectangular in structure, and the precast mold 8 and the curing chamber 7 are arranged along the inner side of the processing workshop 9. This invention can drive the precast box girder 5 to move along an L-shaped path, so that the precast box girder 5 near the precast mold 8 can be transported into the curing chamber 7.

[0055] Reference Figure 3 , Figure 4 and Figure 5 The top surface of the first movable platform 3 is provided with a plurality of first jacks 31 for supporting the precast box girder 5, and the top surface of the second movable platform 4 is provided with a plurality of second jacks 41 for supporting the precast box girder 5; the precast box girder 5 can be selectively pressed against the top of the first jacks 31 and / or the top of the second jacks 41.

[0056] Reference Figure 16 When the precast box girder 5 is pressed onto the first jack 31, the first movable platform 3 can support and push the precast box girder 5 along the transverse rail module 1, transporting the precast box girder 5 from the vicinity of the precast mold 8 to the intersection of the transverse rail module 1 and the longitudinal rail module 2. When the precast box girder 5 is pressed onto the second jack 41, the second movable platform 4 can support and push the precast box girder 5 along the longitudinal rail module 2, transporting the precast box girder 5 from the intersection of the transverse rail module 1 and the longitudinal rail module 2 into the curing chamber 7.

[0057] Reference Figure 4 and Figure 6 The first movable platform 3 includes a first housing 301, a second housing 302, and a third housing 303 fixedly connected in an n-shape (e.g., by bolts). The inner cavity of the first movable platform 3 is provided with a first frame 3001 for supporting the first housing 301, the second housing 302, and the third housing 303; the outer wall of the first frame 3001 is covered with a shell (e.g., by bolts), thus forming the first movable platform 3. The first housing 301 and the second housing 302 are arranged parallel to each other, and a slot 304 for accommodating the second movable platform 4 is provided between the first housing 301 and the second housing 302.

[0058] Reference Figure 6At the intersection of the horizontal rail module 1 and the vertical rail module 2, the second movable platform 4 can be laterally inserted into the insertion slot 304 or laterally pulled out from the insertion slot 304 for the transfer of the precast box girder 5 between the first movable platform 3 and the second movable platform 4.

[0059] Reference Figure 6 When the first movable platform 3 is located at the intersection of the horizontal rail module 1 and the vertical rail module 2, the lateral opening of the insertion slot 304 points towards the vertical rail module 2, so that the second movable platform 4 coming from the vertical rail module 2 can be adapted to be inserted into the insertion slot 304.

[0060] Reference Figure 6 The first housing 301, the second housing 302, and the second track 21 are arranged parallel to each other; the end of the first housing 301 away from the middle of the second track 21 is connected to the third housing 303; the end of the second housing 302 away from the middle of the second track 21 is connected to the third housing 303. That is, the insertion slot 304 is located on the side of the first moving platform 3 closer to the longitudinal rail module 2, rather than on the side away from the longitudinal rail module 2, so that the second moving platform 4 coming from the longitudinal rail module 2 can be smoothly inserted laterally into the insertion slot 304, or pulled laterally out of the insertion slot 304.

[0061] Reference Figure 6 and Figure 7 A first pressure sensor 33 is installed on the end face of the first movable platform 3 (the first pressure sensor 33 is fixedly connected to the first frame 3001 by bolts; the first pressure sensor 33 is inserted into the receiving hole of the vehicle body, and the first pressure sensor 33 and the receiving hole are sealed to prevent water ingress). A column 34 for pressing the first pressure sensor 33 is vertically inserted between the two first rails 11; the top of the column 34 is not higher than the top surface of the first movable platform 3. When the first movable platform 3 moves to the intersection of the horizontal rail module 1 and the vertical rail module 2, the first pressure sensor 33 abuts against the side wall of the column 34, and the first pressure sensor 33 converts the pressure signal into an electrical signal and transmits it to the control system. The control system determines that the first movable platform 3 has moved to the required position, and then controls the first movable platform 3 to stop moving (i.e., to stand still).

[0062] The second movable platform 4 is rectangular in shape. A second frame, also rectangular in shape, is housed within the inner cavity of the second movable platform 4. A vehicle shell (e.g., fixed by bolts) covers the outer wall of the second frame, thus forming the second movable platform 4.

[0063] Reference Figure 8A second pressure sensor 43 is installed on the outer wall of the second movable platform 4, and the third housing 303 can press the second pressure sensor 43 into place. The second pressure sensor 43 is fixedly connected to the second frame by bolts; the second pressure sensor 43 is inserted into the through hole of the housing, and the second pressure sensor 43 and the through hole are sealed to prevent water ingress. When the end face of the second movable platform 4 is inserted into the root of the insertion slot 304, the second pressure sensor 43 abuts against the side wall of the third housing 303. The second pressure sensor 43 converts the pressure signal into an electrical signal and transmits it to the control system. The control system determines that the second movable platform 4 has moved to the required position and then controls the second movable platform 4 to stop moving (i.e., remain stationary).

[0064] Reference Figure 3 and Figure 4 Each side of the insertion slot 304 is equipped with a first jack 31. The first jacks 31 are arranged in pairs and connected to the top surfaces of the first box 301 and the second box 302 respectively. The first jacks 31 are vertically arranged and can push the precast box girder 5 to rise and fall, for transferring the precast box girder 5 between the first moving platform 3 and the second moving platform 4. The bottom end of the first jack 31 is fixedly connected to the first frame 3001 (for example, by bolts). The first jack 31 is inserted into the through hole of the car body, and a sealant is provided between the first jack 31 and the through hole to prevent dust and water from entering.

[0065] Reference Figure 7 and Figure 9 The bottom surface of the first movable platform 3 is provided with several rotatable first movable wheels 32. The wheel seats of the first movable wheels 32 are fixedly connected to the first frame 3001 (for example, by bolts); the first movable wheels 32 are inserted into the through holes of the vehicle body. The first movable wheels 32 are arranged in two rows and are respectively pressed onto two first tracks 11; the cylindrical surface of the first movable wheel 32 is provided with a first annular groove, and the first track 11 is locked in the first annular groove, thereby preventing the first movable wheels 32 from falling off the first track 11. The first movable wheels 32 are arranged in pairs on both sides of the insertion groove 304, thereby achieving stable support for the precast box girder 5 and preventing the first movable platform 3 and the precast box girder 5 from tilting.

[0066] Reference Figure 10 and Figure 11The bottom surface of the second movable platform 4 is provided with several rotatable second movable wheels 42. The wheel seats of the second movable wheels 42 are fixedly connected to the second frame (e.g., by bolts); the second movable wheels 42 are inserted into the through holes of the vehicle body. The second movable wheels 42 are arranged in two rows and are respectively pressed onto two second rails 21; the cylindrical surface of the second movable wheel 42 is provided with a second annular groove, and the second rails 21 are engaged in the second annular groove, thereby preventing the second movable wheels 42 from falling off the second rails 21. The two rows of second movable wheels 42 pressed onto two second rails 21 respectively provide stable support for the precast box girder 5 and prevent the second movable platform 4 and the precast box girder 5 from tilting.

[0067] The number of the first moving wheels 32 and the number of the second moving wheels 42 are both even. There are at least four first moving wheels 32 and at least four second moving wheels 42.

[0068] Reference Figure 2 , Figure 9 and Figure 11 A square support rail 111 and a cross gap 110 are provided at the intersection of the first track 11 and the second track 21. The cross gap 110 is located on the outer periphery of the square support rail 111 to accommodate the circumferential surfaces of the first moving wheel 32 and the second moving wheel 42, ensuring that the first moving wheel 32 and the second moving wheel 42 will not derail when rolling over the intersection of the first track 11 and the second track 21, thus avoiding safety accidents. The bottom side wall of the square support rail 111 is fixedly connected to the first track 11 or the second track 21 (e.g., through an integral fixed connection), and the bottom end of the square support rail 111 is fixedly connected to the first track plate 12 or the second track plate 22.

[0069] A first motor is installed inside the first movable platform 3. The first motor is connected to the first movable wheel 32 via a first reducer. The first motor is fixedly connected to the first frame 3001 (e.g., by bolts), and the first reducer is also fixedly connected to the first frame 3001 (e.g., by bolts). The first motor can drive the first movable wheel 32 to rotate via the first reducer, thereby driving the first movable platform 3 and the precast box girder 5 pressed onto the first movable platform 3 to move, thus realizing the transfer.

[0070] A second motor is installed inside the second movable platform 4. The second motor is connected to the second movable wheel 42 via a second reducer. The second motor is fixedly connected to the second frame (e.g., by bolts), and the second reducer is also fixedly connected to the second frame (e.g., by bolts). The second motor can drive the second movable wheel 42 to rotate via the second reducer, thereby driving the second movable platform 4 and the precast box girder 5 pressed onto the second movable platform 4 to move, thus realizing the transfer.

[0071] Reference Figure 9 and Figure 11 The horizontal rail module 1 also includes a first track plate 12 embedded in the ground 6, which is fixedly connected to the foundation (e.g., by bolts or by integral casting), and a first track 11 is fixedly connected to the first track plate 12 (e.g., by bolts). The vertical rail module 2 also includes a second track plate 22 embedded in the ground 6, which is fixedly connected to the foundation (e.g., by bolts and integral casting), and a second track 21 is fixedly connected to the second track plate 22 (e.g., by bolts). Thus, the first track plate 12 and the second track plate 22 reduce the pressure on the ground 6, preventing settlement of the first track 11 and the second track 21.

[0072] Reference Figure 15 and Figure 17 The curing chamber 7 includes a support frame 71, a cover 72, and embedded blocks 73. The support frame 71 is vertically arranged, and there are two support frames 71. A receiving groove for accommodating a second movable platform 4 is provided between the two support frames 71. The second movable platform 4 can support the precast box girder 5 and reciprocate laterally within the receiving groove. The bottom end of the support frame 71 is inserted into the ground 6 and fixedly connected to the embedded blocks 73 (e.g., by welding, bolts, and integral casting). The embedded blocks 73 are reinforced concrete structures and fixedly connected to the foundation (e.g., by bolts and integral casting). The cover 72 includes a light steel keel frame and a shielding cover covering the outer surface of the light steel keel frame. The bottom end of the light steel keel frame is inserted into the ground 6 and fixedly connected to the embedded blocks 73 (e.g., by bolts). The shielding cover is made of plastic film or mesh fabric and is used to achieve heat preservation and moisture retention within the curing chamber 7.

[0073] The first movable platform 3 houses a first battery, a first wireless transceiver, and a first controller, all of which are fixedly connected to the first frame 3001 (e.g., via bolts). The first movable platform 3 also houses a first oil tank and a first oil pump, both fixedly connected to the first frame 3001 (e.g., via bolts). The first oil tank and the first oil pump are connected and communicate with each other. The first oil pump is connected to the first jack 31 (via a hydraulic hose). The first oil pump can pressurize the hydraulic oil in the first oil tank into the first jack 31, thereby driving the output shaft of the first jack 31 to lift; or drive the hydraulic cylinder inside the first jack 31 to return to the first oil tank, thus retracting the output shaft of the first jack 31. The first oil pump, the first motor, the first battery, the first wireless transceiver, and the first sensor are electrically connected to the first controller (including wires and / or signal lines); the first wireless transceiver is wirelessly connected to the first peripheral remote controller, and the user can control the moving direction of the first movable platform 3 and the extension and retraction state of the first jack 31 through the remote controller.

[0074] The second movable platform 4 houses a second battery, a second wireless transceiver, and a second controller. These components are fixedly connected to the second frame (e.g., via bolts). The second movable platform 4 also houses a second oil tank and a second oil pump, both fixedly connected to the second frame (e.g., via bolts). The second oil tank and the second oil pump are connected and communicate with each other. The second oil pump is connected to the second jack 41 (via a hydraulic hose). The second oil pump can pressurize the hydraulic oil in the second oil tank into the second jack 41, thereby driving the output shaft of the second jack 41 to lift; or drive the hydraulic cylinder within the second jack 41 to return to the second oil tank, thus retracting the output shaft of the second jack 41. The second oil pump, second motor, second battery, second wireless transceiver, and second sensor are electrically connected to the second controller (including wires and / or signal lines); the second wireless transceiver is wirelessly connected to the second peripheral remote controller, allowing the user to control the movement direction of the second movable platform 4 and the extension / retraction state of the second jack 41 via the remote controller. The first and second peripheral remote controllers are integrated into one unit.

[0075] Both the first pressure sensor 33 and the second pressure sensor 43 are toggle switches. The pressure lever of the toggle switch can rotate to provide a braking distance for the first moving platform 3 and the second moving platform 4, thus avoiding impact damage.

[0076] Operating steps: ① Move the first moving platform 3 to a position near the precast mold 8 (until the first pressure sensor 33 receives pressure); ② Open the precast mold 8, then use a gantry crane to lift the precast box girder 5 and place it on the first moving platform 3 (the first jack 31 on the upper surface), ensuring that the insertion slot 304 is located below the center of the precast box girder 5; ③ Refer to... Figure 12 The first moving platform 3 carries the precast box girder 5 and moves it to the intersection of the horizontal rail module 1 and the vertical rail module 2; ④ The output shaft of the second jack 41 retracts (i.e., moves downward), and then the second moving platform 4 moves laterally and inserts into the insertion slot 304 (until the second pressure sensor 43 receives pressure) (at this time, the second moving platform 4 is located below the center of the precast box girder 5); ⑤ Refer to Figure 13 The output shaft of the first jack 31 retracts (i.e., moves downward), and the output shaft of the second jack 41 extends (i.e. moves upward), so that the load of the precast box girder 5 is transferred from the first jack 31 to the second jack 41; ⑥ Refer to Figure 14 ⑦ The second moving platform 4 moves laterally and is pulled out from the insertion slot 304; ⑧ The second moving platform 4 carries the precast box girder 5 and moves into the curing chamber 7; ⑨ The second moving platform 4 moves between the two support frames 71, and then the output shaft of the second jack 41 retracts, placing the precast box girder 5 on the support frame 71 (so that the two ends of the bottom surface of the support frame 71 are respectively pressed onto the two support frames 71); ⑨ The second moving platform 4 drives out of the curing chamber 7.

[0077] This utility model utilizes a first moving platform 3 and a second moving platform 4 that can interlock with each other and whose moving paths are perpendicular to each other to realize the turning transportation of the precast box girder 5. That is, the precast box girder 5 is translated rather than rotated at the turning position, avoiding the use of turntables and T-shaped tracks, thereby avoiding the generation of bending moment and the problem of bending deformation of T-shaped tracks.

[0078] When the precast box girder 5 is placed above the insertion slot 304, the second movable platform 4 is inserted into the insertion slot 304, and the precast box girder 5 is lifted by the second jack 41, which can transfer the load of the precast box girder 5 from the first movable platform 3 to the second movable platform 4. Then, the second movable platform 4, which carries the precast box girder 5, moves laterally and is pulled out of the insertion slot 304, completing the convenient transfer of the precast box girder 5 between the first movable platform 3 and the second movable platform 4. The first movable platform 3 and the second movable platform 4 do not need to rotate, which reduces the risk of derailment due to eccentric load (eccentric load comes from the weight of the precast box girder 5).

[0079] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0080] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0081] In conclusion, for those skilled in the art, any changes, modifications, substitutions, or variations made to this utility model based on its guidance, without departing from its principles and spirit, shall still fall within the protection scope of this utility model.

Claims

1. A device for transferring a precast box girder, characterized by: It includes a horizontal rail module (1), a vertical rail module (2), a first movable platform (3), and a second movable platform (4); The horizontal rail module (1) includes two parallel first rails (11), and the vertical rail module (2) includes two parallel second rails (21); the horizontal rail module (1) and the vertical rail module (2) are perpendicularly intersecting each other; the first movable platform (3) is connected to the horizontal rail module (1) and can reciprocate along the length direction of the first rail (11), and the second movable platform (4) is connected to the vertical rail module (2) and can reciprocate along the length direction of the second rail (21); The top surface of the first movable platform (3) is provided with a plurality of first jacks (31) for supporting the precast box girder (5), and the top surface of the second movable platform (4) is provided with a plurality of second jacks (41) for supporting the precast box girder (5); the precast box girder (5) can be selectively pressed onto the top of the first jack (31) and / or the top of the second jack (41); The first movable platform (3) includes a first housing (301), a second housing (302) and a third housing (303) fixedly connected in an n-shape; the first housing (301) and the second housing (302) are arranged parallel to each other, and a plug-in slot (304) for accommodating the second movable platform (4) is provided between the first housing (301) and the second housing (302). At the intersection of the horizontal rail module (1) and the vertical rail module (2), the second movable platform (4) can be laterally inserted into the insertion slot (304) or laterally pulled out from the insertion slot (304) for the transfer of the precast box girder (5) between the first movable platform (3) and the second movable platform (4).

2. The device for transferring precast box girder according to claim 1, wherein: When the first movable platform (3) is located at the intersection of the horizontal rail module (1) and the vertical rail module (2), the lateral opening of the insertion slot (304) points towards the vertical rail module (2).

3. The device for transferring precast box girder according to claim 2, characterized in that: The first box (301), the second box (302) and the second track (21) are arranged in parallel to each other; the end of the first box (301) away from the middle of the second track (21) is connected to the third box (303); the end of the second box (302) away from the middle of the second track (21) is connected to the third box (303).

4. The device for transferring precast box girder according to claim 3, characterized in that: A first pressure sensor (33) is installed on the end face of the first movable platform (3), and a column (34) for pressing the first pressure sensor (33) is vertically inserted between the two first tracks (11); the top of the column (34) is not higher than the top surface of the first movable platform (3).

5. The device for transferring precast box girder according to claim 4, characterized in that: The second pressure sensor (43) is installed on the outer wall of the second movable platform (4), and the third housing (303) can press the second pressure sensor (43).

6. The device for transferring precast box girder according to claim 5, wherein: The first jack (31) is provided on both sides of the insertion slot (304); the first jack (31) is connected in pairs to the top surface of the first box (301) and the top surface of the second box (302).

7. The device for transferring precast box girder according to claim 6, characterized in that: The bottom surface of the first movable platform (3) is provided with a number of first movable wheels (32) that can rotate. The first movable wheels (32) are arranged in two rows and are respectively pressed on the two first tracks (11). The cylindrical surface of the first movable wheel (32) is provided with a first annular groove, and the first track (11) is locked in the first annular groove.

8. The device for transferring precast box girder according to claim 7, characterized in that: The first movable wheels (32) are arranged in pairs on both sides of the insertion slot (304).

9. The device for transferring precast box girder according to claim 8, characterized in that: The bottom surface of the second movable platform (4) is provided with several rotatable second movable wheels (42). The second movable wheels (42) are arranged in two rows and are respectively pressed on the two second tracks (21). The cylindrical surface of the second movable wheel (42) is provided with a second annular groove, and the second track (21) is locked in the second annular groove.

10. The device for transferring precast box girder according to claim 9, characterized in that: The horizontal rail module (1) further includes a first track plate (12) buried in the ground (6), and the first track (11) is fixedly connected to the first track plate (12); the vertical rail module (2) further includes a second track plate (22) buried in the ground (6), and the second track (21) is fixedly connected to the second track plate (22).

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