A semicircular track type segmented turning device and its working method

Abstract

A semicircular track type segmented turning device and its working method, which belong to the technical field of ship and marine structure construction. The device includes a structural frame, a segmented platform, a lifting mechanism and a rotating mechanism. The structural frame is used to support the segmented platform. The segments are mounted on the segmented platform and are lifted to the target position by the lifting mechanism. The rotating mechanism then drives the segmented platform and the segments to rotate 180 degrees around their rotation axis and turn over. The lifting mechanism then lowers the segments to the lowest position to complete the turning operation. When in use, the segments are transported to the bottom of the device by the SPMT trolley, and the device lifts the segments to the air and turns them over. The turned segments are then placed back on the SPMT trolley to complete the turning operation. The device has a simple structure, is easy to build and operate, has strong practicality, and has good structural strength, making the turning of segments in the construction process of ships and marine structures more efficient, economical and safe.

Description

Technical Field

[0001] The invention relates to a semicircular track type segmented turning device and a working method thereof, and belongs to the technical field of ship and marine structure construction. Background Art

[0002] Sectional turning is a critical step in today's shipbuilding process. During this process, the ship's sections are flipped and positioned correctly for further hull reinforcement and equipment installation. However, this process presents several challenges. For example, existing methods typically require the use of a crane, which is complex and inefficient. Furthermore, existing technologies can require the collaboration of multiple workers, increasing labor costs and safety risks. Summary of the Invention

[0003] In response to the above problems, the present invention aims to design a semicircular track segment turning device, in which the segments are transported to the bottom of the device by the SPMT trolley, and the device lifts the segments into the air and turns them over, and then places the turned segments back into the SPMT trolley to complete the turning operation.

[0004] The technical solution adopted in the present invention is:

[0005] A semicircular track type segmented turning device comprises a structural frame and a segmented platform. The device also comprises a lifting mechanism and a rotating mechanism. The lifting mechanism drives the segmented platform to move up and down, and the rotating mechanism drives the segmented platform to turn over. A quick plug-in mechanism for connecting or disconnecting the segmented platform is provided between the segmented platform and the segments.

[0006] The structural frame uses connecting beams to connect the arch frames on both sides, and the arch frames are formed into an arch shape by side columns and a semicircular top frame; a central column is set in the middle of the arch frame;

[0007] The lifting mechanism includes a power unit and a vertical track, which is arranged on the central column; the motor fixed on the segmented platform in the rotating mechanism drives the rotating gear, which engages with the circular rack arranged on the inner side of the semicircular top frame to drive the segmented platform to flip;

[0008] The segmented platform is provided with a square hole for the SPMT trolley to pass through.

[0009] The quick plug-in and pull-out mechanism between the segmented platform and the segments comprises a double-layer lifting lug on the segmented platform, a segmented lifting lug on the segments and a latch that interacts with the two.

[0010] A method for operating a semicircular track type segmented turning device comprises the following steps:

[0011] (1) Move the segment to the front of the turning device using the SPMT trolley and place the segment platform upside down and horizontally;

[0012] (2) Lay the trolley running road pads, drive the trolley to the position directly under the turning device, lower the segmented platform, and fix the segment and the segmented platform through the quick plug-in mechanism;

[0013] (3) Locking the rotation of the segmented platform and using the lifting mechanism to move the segmented platform to the target position;

[0014] (4) Release the segmented platform from rotation and rotate the segmented platform 180 degrees around the center by rotating the gear;

[0015] (5) Lock the segmented platform and rotate it to fix it. Use the lifting mechanism to lower the segmented platform. The SPMT flatbed car passes through the segmented platform through the square hole of the segmented platform. The SPMT trolley is lifted up to transfer the weight of the segment to the SPMT trolley, and the fixation between the segment and the segmented platform is released.

[0016] (6) Remove the SPMT trolley road pad, lower the segmented platform to the lowest point, drive the SPMT trolley out, and the segmented turning operation is completed.

[0017] Furthermore, when the power unit in the lifting mechanism is driven by a hydraulic motor and gears, the vertical track is a rack structure.

[0018] Furthermore, the lifting motor in the power unit drives the driving gear through the rotating central shaft, the hydraulic cylinder is connected to the driven gear through the telescopic shaft, and the vertical track is a vertical rack track; the driving gear, the driven gear and the vertical rack track are engaged to perform up and down reciprocating motion.

[0019] Furthermore, the working method when adopting the above technical solution includes the following steps:

[0020] (1) Move the segment to the front of the turning device using the SPMT trolley and place the segment platform upside down and horizontally;

[0021] (2) Lay the trolley running road pads, drive the trolley to the position directly under the turning device, lower the segmented platform, and fix the segment and the segmented platform through the quick plug-in mechanism;

[0022] (3) Locking the rotation of the segmented platform, and using the engagement of the driving gear, the driven gear and the vertical rack track in the lifting mechanism to move the segmented platform to the target position;

[0023] (4) The telescopic shaft is retracted by the hydraulic cylinder to release the segmented platform from rotation; the segmented platform is then rotated 180 degrees around the rotation axis by engaging the rotating gear with the circular rack;

[0024] (5) The telescopic shaft is extended by the hydraulic cylinder on the other side to lock the segmented platform and rotate it; the segmented platform is lowered by meshing the driving gear, the driven gear and the vertical rack track in the lifting mechanism, and the SPMT flatbed car passes through the segmented platform through the square hole of the segmented platform. The SPMT trolley is lifted to transfer the weight of the segment to the SPMT trolley, and the segment and the segmented platform are disassembled by the quick plug-in mechanism;

[0025] (6) Remove the SPMT trolley road pad, lower the segmented platform to the lowest point, drive the SPMT trolley out, and the segmented turning operation is completed.

[0026] Furthermore, when the power unit in the lifting mechanism is driven by an electric winch and a pulley block, the vertical track is a linear sliding slideway.

[0027] Furthermore, the electric winch and the fixed pulley in the power unit are fixed on the central column, the cable of the electric winch passes through the fixed pulley and is connected to the movable pulley, a slider is provided under the movable pulley, and a slider rotating shaft for connecting to the segmented platform is provided on the slider; the vertical track is a sliding track, and the slider reciprocates up and down along the sliding track.

[0028] Furthermore, the working method using the above technical solution includes the following steps:

[0029] (1) Move the segment to the front of the turning device using the SPMT trolley and place the segment platform upside down and horizontally;

[0030] (2) Lay the trolley running road pads, drive the trolley to the position directly under the turning device, lower the segmented platform, and fix the segment and the segmented platform through the quick plug-in mechanism;

[0031] (3) In the lifting mechanism, after the electric winch is started, the cable is continuously shortened, driving the slider below the movable pulley to move vertically along the sliding track, thereby driving the segmented platform connected to the slider through the slider rotation axis to move vertically, and moving the segmented platform to the target position;

[0032] (4) The segmented platform is then rotated 180 degrees around the rotation axis by engaging the rotating gear with the circular rack;

[0033] (5) The vertical movement of the slider is then achieved through the cooperation of the electric winch, fixed pulley, and movable pulley, driving the segmented platform to descend. The SPMT flatbed car passes through the segmented platform through the square hole of the segmented platform, and the SPMT trolley is lifted to transfer the weight of the segment to the SPMT trolley. The segment and the segmented platform are then disconnected through the quick plug-in mechanism.

[0034] (6) Remove the SPMT trolley road pad, lower the segmented platform to the lowest point, drive the SPMT trolley out, and the segmented turning operation is completed.

[0035] The beneficial effects of the present invention are:

[0036] The turning device consists of a structural frame, a segment platform, a lifting mechanism, and a rotating mechanism. The segments are transported to the bottom of the device via an SPMT trolley, which then lifts the segments into the air for turning. The turned segments are then returned to the SPMT trolley to complete the turning operation. The device features a simple structure, is easy to construct and operate, is highly practical, and possesses excellent structural strength, making segment turning more efficient and economical during the construction of ships and offshore structures. It can be completed with fewer workers and equipment, while improving operational safety and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below with reference to the accompanying drawings and implementation methods.

[0038] Figure 1 It is a structural diagram of a semicircular track type segmented turning device.

[0039] Figure 2 It is a structural diagram of the segmented platform.

[0040] Figure 3 This is a partial enlarged view of the quick plug-and-disconnect mechanism.

[0041] Figure 4 This is a partial enlarged view of the gear-type lifting mechanism.

[0042] Figure 5 This is a partial enlarged view of the gear-type lifting mechanism (gearless).

[0043] Figure 6 This is a partial enlarged view of the slide rail lifting mechanism.

[0044] Figure 7 This is a partial enlarged view of the rotating mechanism.

[0045] Figure 8a-8h It is a flow chart of the working process of the turning device.

[0046] In the figure: 1. Structural frame, 1a. Connecting beam, 1b. Arch frame, 1c. Central column, 1d. Side column, 1e. Semicircular top frame, 2. Segmented platform, 2a. Square hole, 2b. Double-layer lifting lug, 2c. Latch, 3. Lifting mechanism, 3a. Driving gear, 3b. Vertical rack track, 3c. Lifting motor, 3d. Rotating center axis, 3e. Hydraulic cylinder, 3f. Telescopic shaft, 3m. Electric winch, 3h. Cable, 3i. Movable pulley, 3j. Slider, 3k. Slider rotating axis, 3n. Fixed pulley, 3o. Sliding track; 4. Rotating mechanism, 4a. Rotating gear, 4b. Linear rack, 4c. Circular rack, 5. Segment, 5a. Segmented lifting lug. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] A semicircular track type segment turning device is a device used to turn over segments during the construction of ships and marine structures; it includes a structural frame 1, a segment platform 2, a lifting mechanism 3, and a rotating mechanism 4. The segment platform 2 is equipped with a segment 5 that needs to be turned over. The lifting mechanism 3 vertically raises the segment carried on the segment platform 2 along the structural frame 1 to the turning operation height. The rotating mechanism 4 rotates the segment platform 2 180 degrees along the semicircular gear track to complete the turning operation. The lifting mechanism 3 lowers the segment platform 2 to the transportation height to complete the turning operation.

[0049] The structural frame 1 is fixed to the ground, and the segmented platform 2 is connected to the structural frame 1 through a lifting mechanism 3 and a rotating mechanism 4. The lifting mechanism 3 can drive the segmented platform 2 to rise or fall vertically, and the rotating mechanism 4 can drive the segmented platform 2 to rotate 180 degrees around the semicircular gear track.

[0050] Two square holes 2a are provided in the middle of the segmented platform 2, which can be used for the SPMT trolley to pass vertically during the turning operation.

[0051] A rotation axis is provided in the middle of the segmented platform 2 so that the segmented platform 2 can rotate 180 degrees around the rotation axis.

[0052] The segmented platform 2 is provided with two rows of double-layer lifting lugs 2b, which are fixedly connected to the segmented lifting lugs 5a via latches 2c.

[0053] The lifting mechanism 3 is driven up and down along its vertical track by a power unit. The power unit can be driven by a hydraulic motor and gears, or by an electric winch and pulley system. When the power unit is driven by a hydraulic motor and gears, the vertical track is a rack-and-pinion structure. When the power unit is driven by an electric winch and pulley system, the vertical track is a linear slide.

[0054] The rotating mechanism 4 consists of a motor fixed to the segmented platform 2, a rotating pinion 4a driven by the motor, and a circular rack 4c fixed to the semicircular top frame 1e. The motor can be a hydraulic motor or a stepper motor, driving the pinion along the circular rack track, driving the segmented platform 2 to complete a 180-degree rotation.

[0055] Example 1

[0056] Figures 1 to 7A semicircular track type segmented turning device is shown, which includes a structural frame 1, a segmented platform 2, a lifting mechanism 3 and a rotating mechanism 4.

[0057] Figure 1 In the structure frame 1, multiple connecting beams 1a are used to connect the arch frames 1b at both ends. The arch frame 1b includes two side columns 1d and a semicircular top frame 1e to form an arch shape, and a central column 1c is set in the middle of the arch frame 1b.

[0058] Figure 4 and Figure 5 In the figure, the power unit of the lifting mechanism 3 is driven by a hydraulic motor and gears, and the vertical track is a rack-and-pinion structure. The power unit is a lifting motor 3c, which drives the driving gear 3a via a rotating central shaft 3d. A hydraulic cylinder 3e is connected to a driven gear 3g via a telescopic shaft 3f. The vertical track is a vertical rack track 3b. The vertical rack track 3b is located inside the center column 1c. The driving gear 3a and the driven gear 3g mesh with the vertical rack track 3b to drive the segmented platform 2 up and down.

[0059] The lifting motor 3c and the hydraulic cylinder 3e are arranged on the segmented platform 2, and two square holes 2a are provided on the segmented platform 2. Figure 2 and Figure 3 In the figure, a quick-plug mechanism is provided between the segmented platform 2 and the segmented 5. That is, the double-layer lifting lugs 2b on the segmented platform 2 are connected to the segmented lifting lugs 5a provided on the segmented 5 via latches 2c. Two rows of double-layer lifting lugs 2b are provided on the segmented platform 2, one on each side of the platform with the lifting mechanism 3.

[0060] Figure 7 In the figure, the rotating mechanism 4 uses a motor fixed to the segmented platform 2 to drive a rotating gear 4a. This gear 4a meshes with a circular rack mounted on the inside of the semicircular top frame 1e, rotating the segmented platform 2 about a central axis 3d. One end of the central axis 3d is connected to the lifting motor 3c, and the other end is engaged with the central column 1c via a driving gear 3a.

[0061] As shown in FIG8 , when the above technical solution is used, the following steps are included:

[0062] (1) Move the segment to the front of the turning device via the SPMT trolley, and place the segment platform 2 upside down and horizontally ( Figure 8a );

[0063] (2) Lay the SPMT trolley running road pads and drive the SPMT trolley to the position directly under the turning device ( Figure 8b ), the segmented platform 2 is lowered, and the segment 5 is fixed to the segmented platform 2 through a quick plug-in mechanism; that is, the double-layer lifting ear 2b is connected to the segmented lifting ear 5a by the pin 2c.

[0064] (3) The hydraulic cylinder 3e extends the telescopic shaft 3f and locks the rotation of the segmented platform. The lifting motor 3c in the lifting mechanism 3 drives the driving gear 3a through the rotating shaft 3d. One side of the driving gear 3a engages with the vertical rack track 3b, and the other side drives the driven gear 3g to engage with the vertical rack track 3b on the other side. The driving gear 3a and the driven gear 3g engage with the vertical rack track 3b, moving the segmented platform 2 to the target position ( Figure 8c ); during this process, the rotating gear 4a engages with the linear rack 4b provided on the side column 1d, jointly driving the segmented platform 2 to move.

[0065] (4) The telescopic shaft 3f is retracted by the hydraulic cylinder 3e, and the segmented platform 2 is released from rotation. At this time, the driving gear 3a and the driven gear 3g are stuck in the middle of the vertical rack track 3b. One end of the rotating center axis 3d is connected to the driving gear 3a, and the other end is set on the lifting motor 3c. At this time, the segmented platform 2 can rotate with the rotating center axis 3d as the axis. The rotating motor further drives the rotating gear 4a to engage with the circular rack 4c, driving the segmented platform 2 to rotate 180 degrees around the rotating center axis 3d. Figure 8d To rotate 45 degrees, Figure 8e To rotate 90 degrees, Figure 8f for a 180-degree rotation);

[0066] (5) After the platform rotates, the hydraulic cylinder on the other side extends the telescopic shaft 3f and inserts it into the driven gear 3g, locking the segmented platform 2 in rotation. By utilizing the engagement of the driving gear 3a, the driven gear 3g and the vertical track rack track 3b in the lifting mechanism 3, the segmented platform 2 is moved downward, and the SPMT flatbed car passes through the segmented platform 2 through the square hole 2a of the segmented platform 2. The SPMT trolley is lifted and the weight of the segment 5 is transferred to the SPMT trolley. The fast plug-in mechanism is used to release the fixation between the segment and the segmented platform; that is, the pin 2c at the connection between the double-layer lifting ear 2b and the segmented lifting ear 5a is pulled out.

[0067] (6) Remove the SPMT trolley road pad, lower the segment platform 2 to the lowest point, drive the SPMT trolley out, and the segment turning operation is completed.

[0068] Example 2

[0069] Figures 1 to 7 A semicircular track type segmented turning device is shown, which includes a structural frame 1, a segmented platform 2, a lifting mechanism 3 and a rotating mechanism 4.

[0070] Figure 1 In the structure frame 1, multiple connecting beams 1a are used to connect the arch frames 1b at both ends. The arch frame 1b includes two side columns 1d and a semicircular top frame 1e to form an arch shape, and a central column 1c is set in the middle of the arch frame 1b.

[0071] Figure 6 In the example, when the power unit in the lifting mechanism 3 is driven by an electric winch and pulley assembly, the vertical track is a linear sliding track. The fixed pulley 3n and electric winch 3m in the lifting mechanism 3 are fixed to the sliding track 3o. The coordinated movement of the electric winch 3m, fixed pulley 3n, movable pulley 3i, and cable 3h enables vertical movement of the slider 3J. At this point, the segmented platform 2 is connected to the slider 3J via the slider's rotating shaft 3k, enabling vertical movement.

[0072] Figure 2 and Figure 3 In the figure, a quick-plug mechanism is provided between the segmented platform 2 and the segmented 5. That is, the double-layer lifting lugs 2b on the segmented platform 2 are connected to the segmented lifting lugs 5a provided on the segmented 5 via latches 2c. Two rows of double-layer lifting lugs 2b are provided on the segmented platform 2, one on each side of the platform with the lifting mechanism 3.

[0073] Figure 7 In the figure, the rotating mechanism 4 uses a motor fixed to the segmented platform 2 to drive a rotating gear 4a. This gear 4a meshes with a circular rack mounted on the inside of the semicircular top frame 1e, rotating the segmented platform 2 about a central axis 3d. One end of the central axis 3d is connected to the lifting motor 3c, and the other end is engaged with the central column 1c via a driving gear 3a.

[0074] When the above technical solution is used, the following steps are included:

[0075] (1) Move the segment to the front of the turning device using the SPMT trolley, and place the segment platform 2 upside down and horizontally;

[0076] (2) Lay the SPMT trolley running road pads, drive the SPMT trolley to the position directly below the turning device, lower the segmented platform 2, and fix the segment 5 to the segmented platform 2 through the quick plug-in mechanism; that is, use the pin 2c to connect the double-layer lifting ear 2b to the segmented lifting ear 5a.

[0077] (3) In the lifting mechanism 3, the vertical movement of the slider 3J can be achieved through the coordinated movement of the electric winch 3m, the fixed pulley 3n, and the movable pulley 3I. After the electric winch 3m is started, the cable 3h is continuously shortened, driving the slider 3J below the movable pulley 3I to move vertically along the sliding track 3o. The segmented platform 2 is connected to the slider 3J through the slider rotation axis 3k, thereby performing vertical movement. During this process, the rotating gear 4a engages with the linear rack 4b provided on the side column 1d, and together drives the segmented platform 2 to move, moving the segmented platform 2 to the target position;

[0078] (4) The rotary motor drives the rotating gear 4a to engage with the circular rack 4c, driving the segmented platform 2 to rotate 180 degrees around the rotation center axis 3d;

[0079] (5) After the rotation is completed, the vertical movement of the slider 3J is achieved by the coordinated movement of the electric winch 3m, the fixed pulley 3n, and the movable pulley 3I in the lifting mechanism 3, which drives the segmented platform 2 to move downward. The SPMT flatbed car passes through the square hole 2a of the segmented platform 2 and passes through the segmented platform 2. The SPMT trolley is lifted up, and the weight of the segment 5 is transferred to the SPMT trolley. The fast plug-in mechanism is used to release the fixation between the segment and the segmented platform; that is, the pin 2c at the connection between the double-layer lifting ear 2b and the segmented lifting ear 5a is pulled out.

[0080] (6) Remove the SPMT trolley road pad, lower the segmented platform 2 to the lowest point, and drive the SPMT trolley out ( Figure 8g 、 Figure 8h ), the turning operation is completed in sections.

[0081] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A semicircular track type segmented turning device, comprising a structural frame (1) and a segmented platform (2), characterized in that: The device further comprises a lifting mechanism (3) and a rotating mechanism (4), wherein the lifting mechanism (3) drives the segmented platform (2) to move up and down, and the rotating mechanism (4) drives the segmented platform (2) to flip; a quick plug-in mechanism for connecting or disconnecting is provided between the segmented platform (2) and the segment (5); The structural frame (1) uses connecting beams (1a) to connect arch frames (1b) on both sides. The arch frame (1b) is formed into an arch shape by side columns (1d) and a semicircular top frame (1e). A central column (1c) is provided in the middle of the arch frame (1b). The lifting mechanism (3) comprises a power unit and a vertical track, wherein the vertical track is arranged on a central column (1c); The motor in the rotating mechanism (4) fixed on the segmented platform (2) drives the rotating gear (4a), and the rotating gear (4a) engages with the circular rack (4c) arranged on the inner side of the semicircular top frame (1e), thereby driving the segmented platform (2) to flip; The segmented platform (2) is provided with a square hole (2a) for the SPMT trolley to pass through; When the power unit in the lifting mechanism (3) is driven by a hydraulic motor and gears, the vertical track is a rack-type structure; The lifting motor (3c) in the power unit drives the driving gear (3a) via the rotating central shaft (3d), the hydraulic cylinder (3e) is connected to the driven gear (3g) via the telescopic shaft (3f), and the vertical track is a vertical rack track (3b); the driving gear (3a) and the driven gear (3g) are meshed with the vertical rack track (3b) to perform up and down reciprocating motion; or, When the power unit in the lifting mechanism (3) is driven by an electric winch and a pulley block, the vertical track is a linear sliding slideway; The electric winch (3m) and the fixed pulley (3n) in the power unit are fixed on the central column (1c); the cable (3h) of the electric winch (3m) passes through the fixed pulley (3n) and is connected to the movable pulley (3I); a slider (3J) is provided below the movable pulley (3I); a slider rotating shaft (3k) for connecting to the segmented platform is provided on the slider (3J); the vertical track is a sliding track (3o), and the slider (3J) performs up and down reciprocating motion along the sliding track (3o).

2. A semicircular track type segmented turning device according to claim 1, characterized in that: The quick plug-in / pull-out mechanism between the segmented platform (2) and the segment (5) comprises a double-layer lifting lug (2b) on the segmented platform (2), a segmented lifting lug (5a) on the segment (5), and a latch (2c) acting on the two.

3. The method for operating a semicircular track type segmented turning device according to claim 1, characterized in that: The following steps are involved: (1) Move the segment to the front of the turning device via the SPMT trolley and place the segment platform upside down and horizontally; (2) Lay the trolley running road pads, drive the trolley to the position directly under the turning device, lower the segmented platform, and fix the segment and the segmented platform through the quick plug-in mechanism; (3) Lock the rotation of the segmented platform and use the lifting mechanism to move the segmented platform to the target position; (4) Release the rotation fixation of the segmented platform and rotate the segmented platform 180 degrees around the center by rotating the gear; (5) Lock the segmented platform and rotate it to fix it. Use the lifting mechanism to lower the segmented platform. The SPMT flatbed car passes through the segmented platform through the square hole of the segmented platform. The SPMT trolley is lifted up to transfer the weight of the segment to the SPMT trolley, and the fixation between the segment and the segmented platform is released. (6) Remove the SPMT trolley road pad, lower the segmented platform to the lowest point, drive the SPMT trolley out, and the segmented turning operation is completed.

4. The method for operating a semicircular track type segmented turning device according to claim 1, characterized in that: The following steps are involved: (1) Move the segment to the front of the turning device via the SPMT trolley and place the segment platform upside down and horizontally; (2) Lay the trolley running road pads, drive the trolley to the position directly under the turning device, lower the segmented platform, and fix the segment and the segmented platform through the quick plug-in mechanism; (3) Lock the rotation of the segmented platform and use the engagement of the driving gear, driven gear and vertical rack track in the lifting mechanism to move the segmented platform to the target position; (4) The telescopic shaft is retracted by the hydraulic cylinder to release the segmented platform from rotation fixation; the rotating gear is then engaged with the circular rack to rotate the segmented platform 180 degrees around the rotation axis; (5) The telescopic shaft is extended by the hydraulic cylinder on the other side to lock the segmented platform and rotate it; the segmented platform is lowered by meshing the driving gear, the driven gear and the vertical rack track in the lifting mechanism, and the SPMT flatbed car passes through the segmented platform through the square hole of the segmented platform. The SPMT trolley is lifted and the weight of the segment is transferred to the SPMT trolley. The segment and the segmented platform are disassembled by the quick plug-in mechanism; (6) Remove the SPMT trolley road pad, lower the segmented platform to the lowest point, drive the SPMT trolley out, and the segmented turning operation is completed.

5. The working method of the semicircular track type segmented turning device according to claim 1, characterized in that: The following steps are involved: (1) Move the segment to the front of the turning device via the SPMT trolley and place the segment platform upside down and horizontally; (2) Lay the trolley running road pads, drive the trolley to the position directly under the turning device, lower the segmented platform, and fix the segment and the segmented platform through the quick plug-in mechanism; (3) In the lifting mechanism, after the electric winch is started, the cable is continuously shortened, driving the slider under the movable pulley to move vertically along the sliding track, and then driving the segmented platform connected to the slider through the slider rotation axis to move vertically, moving the segmented platform to the target position; (4) The segmented platform is then rotated 180 degrees around the rotation axis by meshing the rotating gear with the circular rack; (5) The vertical movement of the slider is then achieved through the cooperation of the electric winch, fixed pulley, and movable pulley, driving the segmented platform to descend. The SPMT flatbed car passes through the segmented platform through the square hole of the segmented platform, and the SPMT trolley is lifted to transfer the weight of the segment to the SPMT trolley. The segment and the segmented platform are then disconnected through the quick plug-in mechanism. (6) Remove the SPMT trolley road pad, lower the segmented platform to the lowest point, drive the SPMT trolley out, and the segmented turning operation is completed.

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