A multi-point automatic alignment sling in radiation environment

Abstract

A multi-hanging-point automatic alignment sling in a radiation environment comprises T-shaped load-bearing beams arranged in parallel, a transverse beam is arranged between the T-shaped load-bearing beams arranged in parallel, a longitudinal beam is slidingly arranged below the T-shaped load-bearing beam, and a horizontal eccentric adjustment frame is arranged above the T-shaped load-bearing beam; a guide and detection device is arranged below the T-shaped load-bearing beam, and an automatic axle threading and detection device is arranged below the longitudinal beam; four trolley connection points are arranged on the horizontal eccentric adjustment frame, and the four trolley connection points are suspended below the trolley of the crane through steel wire ropes; four anti-sway lifting points are arranged on the T-shaped load-bearing beam, and the four anti-sway lifting points are cross-connected with four points on the sling; the present invention designs a special sling for solving the problem of achieving accurate alignment between radiation and the suspended object and automatically and safely hooking it to achieve lifting.

Description

Technical Field

[0001] The present invention relates to a multi-lifting-point automatic alignment spreader in a radiation environment, which is used in conjunction with a special crane to achieve lifting and transportation in unmanned areas or areas that cannot be observed under remote monitoring or vision. Background Art

[0002] In nuclear power and plasma physics tests, due to the special characteristics of the products and the process, the transportation and positioning of related products cannot be directly operated before packaging due to radiation. During the process, the lifting cannot be directly observed due to the presence of hydraulic media. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: how to achieve accurate alignment between the radiation and the suspended object and automatically and safely hook it to achieve lifting, so a multi-hanging point automatic alignment lifting device is provided in a radiation environment.

[0004] To achieve the above object, the present invention is achieved through the following technical solutions:

[0005] A multi-hanging point automatic alignment sling in a radiation environment, comprising parallel T-shaped load-bearing beams, a transverse beam disposed between the parallel T-shaped load-bearing beams, a longitudinal beam slidably disposed below the T-shaped load-bearing beams, and a horizontal eccentric adjustment bracket disposed above the T-shaped load-bearing beams; a guide and detection device is disposed below the T-shaped load-bearing beams, and an automatic shaft threading and detection device is disposed below the longitudinal beams;

[0006] The horizontal eccentric adjustment frame is equipped with four trolley connection points, which are suspended under the crane trolley through steel wire ropes; the T-shaped load-bearing beam is equipped with four anti-sway lifting points, which are cross-connected with the four points on the sling;

[0007] The T-shaped load-bearing beam includes two main load-bearing beams arranged in parallel, a transverse beam is arranged between the two main load-bearing beams, and side beams are arranged on both sides of each main load-bearing beam. The two side beams and the middle main load-bearing beam form a T-shaped structure; a Y-direction linear slide is arranged above the side beams, and a longitudinal beam is slidingly arranged on the Y-direction linear slide;

[0008] A T-shaped lead screw is installed between the middle transverse beam and the end transverse beam. The running transmission direction of the T-shaped lead screw is Y-adjustable. One end of the T-shaped lead screw is connected to the motor reducer, and the other end of the T-shaped lead screw is rotatably set on the end transverse beam. The motor reducer drives the T-shaped lead screw to rotate. The T-shaped lead screw is provided with a nut, which is fixedly connected to the longitudinal beam. A guide leg is provided below the main load-bearing beam, and a guide and detection device is provided on the guide leg.

[0009] The guide and detection device includes a guide cone crank arm, a guide cone is provided below one end of the guide cone crank arm, and a push pin is provided below the other end of the guide cone crank arm. The upper part of the push pin passes through the guide cone crank arm and is connected to the guide sleeve. The push pin sleeve between the guide sleeve and the guide cone crank arm is provided with a push pin spring. At the same time, a detection switch is installed at the upper end of the guide sleeve.

[0010] There are two longitudinal beams in total, each of which is arranged perpendicular to the T-shaped load-bearing beam. The longitudinal beam includes a beam body, which is composed of two beams arranged in parallel. The ends of the two beams are connected together, and the middle of the two beams is hollow. A support structure is fixedly installed on the beam body. The bottom of the support structure is provided with an automatic shaft threading and detection device. The upper part of the support structure is provided with a slider, which slides on a Y-direction linear slide rail. A connecting beam is provided between the left and right supporting structures. The connecting beam is fixedly connected to a nut, which is connected to a T-shaped lead screw. Driven by a motor reducer, the Y-direction adjustment of the longitudinal beam is achieved through the T-shaped lead screw.

[0011] An X-axis linear slide rail is installed on the beam body, and rack mounting brackets are provided on both sides of the beam body, and a rack is installed on the rack mounting bracket, and the rack is installed on the other side of the beam body;

[0012] The automatic shaft threading and detection device includes a mobile frame, which is fixedly connected to the longitudinal beam; the mobile frame is a T-shaped structure, and an X-direction slider is provided below the horizontal frame of the mobile frame, and the X-direction slider is slidably provided on the X-direction linear slide rail of the longitudinal beam; a small gear is provided on the top of the mobile frame, and the small gear meshes with the rack of the longitudinal beam. The small gear is driven by an X-direction adjustment reduction motor, and the X-direction adjustment reduction motor is provided on the side of the mobile frame;

[0013] A guide cylinder is provided at the bottom of the mobile frame, one end of which is mounted on one side of the mobile frame; a retracted position detection proximity switch is installed at the shaft extension on the other side of the mobile frame, and a raised position detection proximity switch is installed at the end shaft of the guide cylinder;

[0014] The horizontal eccentric adjustment upper frame includes two upper supporting beams arranged in parallel, one end of the upper supporting beams is connected by an intermediate crossbeam, and the other end of the upper supporting beams is connected by two curved beams. The curvature of the two curved beams is the same, and a sliding gap is provided between the two curved beams; a swing mechanism is provided above the two curved beams, and the shape of the swing mechanism corresponds to the two curved beams. A heavy-duty guide wheel is provided below the swing mechanism, and the swing mechanism is slidably arranged with the two curved beams;

[0015] A first through hole is provided on the middle cross beam, a first screw is provided in the first through hole, the middle cross beam and the transverse beam are fixed together by the first screw, and the first screw serves as the rotation center; a second through hole is provided in the swing mechanism, a second screw is also provided in the second through hole, and the end of the second screw is fixedly connected to the T-shaped load-bearing beam;

[0016] A servo cylinder is arranged on the T-shaped load-bearing beam. One end of the cylinder body of the servo cylinder is hinged on the T-shaped load-bearing beam. The output shaft of the servo cylinder is hinged on the connecting frame. The connecting frame is connected between the middle crossbeam and the arc beam.

[0017] Y-direction sliding blocks are arranged at the lower parts of both ends of the T-shaped load-bearing beam.

[0018] X-direction buffer blocks are respectively provided at both ends of the beam body.

[0019] Compared with the prior art, the present invention has the following beneficial effects: a special lifting device is designed to achieve accurate alignment between the radiation and the suspended object and automatically and safely hook it to achieve lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of the present invention;

[0021] Figure 2 A top view of the present invention;

[0022] Figure 3 A bottom view of the present invention;

[0023] Figure 4 is a side view of the present invention;

[0024] Figure 5 It is the structural diagram of T-type load-bearing beam;

[0025] Figure 6 This is the main view of the guidance and detection device;

[0026] Figure 7 It is a side view of the guiding and detecting device;

[0027] Figure 8 It is the structural diagram of the longitudinal beam;

[0028] Figure 9 This is a structural diagram of the automatic shaft threading and detection device;

[0029] Figure 10 It is a side view of the automatic shaft threading and detection device;

[0030] Figure 11 This is a structural diagram of the guide sleeve in the automatic shaft threading and detection device;

[0031] Figure 12 This is the structural diagram of the horizontal eccentricity adjustment rack;

[0032] Figure 13 This is the structural diagram of the heavy-load guide wheel in the horizontal eccentric adjustment rack. DETAILED DESCRIPTION

[0033] 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.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0035] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, a multi-point automatic alignment sling for use in a radiation environment includes parallel T-shaped load-bearing beams 1, with transverse beams 2 disposed between the parallel T-shaped load-bearing beams 1. A longitudinal beam 3 is slidably disposed below the T-shaped load-bearing beams 1, and a horizontal eccentric adjustment bracket 4 is disposed above the T-shaped load-bearing beams 1. A guide and detection device 5 is disposed below the T-shaped load-bearing beams 1, and an automatic shaft threading and detection device 6 is disposed below the longitudinal beams 3.

[0036] Four trolley connection points 7 are provided on the horizontal eccentric adjustment frame 4, and the four trolley connection points 7 are suspended under the trolley of the crane through steel wire ropes; four anti-sway hanging points 8 are provided on the T-shaped load-bearing beam 1, and the four anti-sway hanging points 8 are cross-connected with the four points on the sling.

[0037] like Figure 3 、 Figure 5 As shown, the T-shaped load-bearing beam 1 includes two main load-bearing beams 11 arranged in parallel, and a transverse beam 2 is arranged between the two main load-bearing beams 11. Generally speaking, Figure 1 As shown, four transverse beams 2 are provided. Side beams 12 are provided on both sides of each main load-bearing beam 11, and the two side beams and the central main load-bearing beam 11 form a T-shaped structure. Y-axis linear guides 13 are provided above the side beams 12, and longitudinal beams 3 slide on the Y-axis linear guides 13. Thus, Y-axis linear guides 13 are installed on both sides of the T-shaped load-bearing beam 1, but not along its entire length. The four central transverse beam sections are not installed. The structure is connected so that the transverse beams 2 rest on top of the T-shaped load-bearing beam 1, thus leaving space for the mechanisms on the Y-axis linear guides 13 to operate.

[0038] Each T-shaped load-bearing beam 1 is simultaneously equipped with two anti-sway suspension points 8, forming a total of four anti-sway suspension points 8 in a symmetrical structure about the center. A T-shaped lead screw 15 is installed between the middle transverse beam and the end transverse beam. The T-shaped lead screw 15 operates in the Y-axis direction. One end of the T-shaped lead screw 15 is connected to a motor reducer 16, and the other end of the T-shaped lead screw 15 is rotatably mounted on the end transverse beam. The motor reducer 16 drives the T-shaped lead screw 15 to rotate. The T-shaped lead screw 15 is provided with a nut, which is fixedly connected to the longitudinal beam 3. A guide leg 14 is provided below the main load-bearing beam 11, and a guide and detection device 5 is installed on the guide leg 14.

[0039] Furthermore, Y-direction sliding blocks 17 are provided at the lower portions of both ends of the T-shaped load-bearing beam 1 to limit the longitudinal beam 3 from running beyond the boundary of the T-shaped load-bearing beam 1 .

[0040] like Figure 6 、 Figure 7 As shown, the guide and detection device 5 includes a guide cone arm 51, with a guide cone 52 disposed below one end of the guide cone arm 51 and a push pin 53 disposed below the other end. The upper portion of the push pin 53 passes through the guide cone arm 51 and connects to a guide sleeve 54. A push pin spring 55 is mounted on the push pin 53 between the guide sleeve 54 and the guide cone arm 51. During assembly, the upper portion of the guide cone arm 51 is connected to the guide leg 14 via a flange. A hole is opened in the middle of the lower plate of the guide cone arm 51, into which the push pin 53 is mounted. The push pin 53 has a step. The lower portion of the push pin 53 fits into the hole, while the upper portion extends into the guide sleeve 54. A push pin spring 55 is installed on the upper portion of the step and then locked with a nut 56. A detection switch 57, which is a proximity switch, is also installed on the upper end of the guide sleeve 54.

[0041] like Figure 8 As shown, there are two longitudinal beams 3, each perpendicular to the T-shaped load-bearing beam 1. The longitudinal beams 3 include a beam body 31, which is composed of two beams arranged side by side, connected at their ends, with a hollow center. A support structure 32 is fixedly mounted on the beam body 31. The bottom of the support structure 32 is equipped with an automatic shaft threading and detection device 6. A slider 33 is mounted above the support structure 32, sliding on a Y-axis linear guide 13. This effectively suspends the longitudinal beams 3 from the bottom of the T-shaped load-bearing beam 1. It should be noted that a support structure 32 is mounted on the left and right sides of the beam body 31. Each support structure 32 has an open top, with a slider 33 mounted on the lower inner portion of the opening. A connecting beam 34 is positioned between the left and right support structures 32. The connecting beam 34 is fixedly connected to a nut 39, which is coupled to a T-shaped lead screw 15. Driven by a motor reducer 16, the force transmitted through the T-shaped lead screw 15 enables Y-axis adjustment of the longitudinal beam 3.

[0042] Moreover, an X-direction linear guide rail 38 is installed on the beam body 31 , and rack mounting brackets 35 are provided on both sides of the beam body 31 . A rack 36 is mounted on the rack mounting brackets 35 , and the rack 36 is installed on the other side of the beam body 31 .

[0043] Furthermore, X-direction buffer blocks 37 are respectively provided at both ends of the beam body 31 .

[0044] like Figure 9 、 Figure 10 、 Figure 11 As shown, the automatic threading and detection device 6 includes a mobile frame 61, which is fixedly connected to the longitudinal beam 3. The mobile frame 61 is a T-shaped structure, and an X-direction slider 62 is provided below the horizontal frame in the mobile frame 61. The X-direction slider 62 is slidably provided on the X-direction linear slide 38 of the longitudinal beam 3. A pinion 65 is provided at the top of the mobile frame 61, and the pinion 65 is engaged with the rack 36 of the longitudinal beam 3. The pinion 65 is driven by an X-direction adjustment reduction motor 66, which is provided on the side of the mobile frame 61. The X-direction adjustment reduction motor 66 can be located in the middle hollow of the longitudinal beam. Such a structure realizes the X-direction movement of the automatic threading and detection device 6.

[0045] A guide tube 63 is provided at the bottom of the movable frame 61. One end of the guide tube 63 is mounted on one side of the movable frame 61, and the other end of the guide tube is connected directly to a screw 631. An internal guide groove is provided inside the guide tube, and a guide groove shaft is mounted on the screw inside the guide tube. The guide groove shaft has a conical structure, with a threaded through hole at the axial center that matches the thread of the screw. An external guide groove is provided on the upper portion of the guide groove shaft, and a flat key is installed in the external guide groove to match the internal guide groove of the guide tube. A synchronous wheel is installed on the outside of the screw, and a handwheel 632 is installed on the outermost part. A box is provided on the outside of the guide tube 63, and the box is rigidly connected to the guide tube. A through-axis reduction motor 64 is installed outside the box. The axial direction of the through-axis reduction motor 64 is parallel to the guide axis. Another synchronous wheel is mounted on the output end of the through-axis reduction motor 64, and a synchronous belt is installed between the two synchronous wheels.

[0046] A retracted-in-place detection proximity switch 67 is installed at the shaft extension on the other side of the movable frame 61, and a raised-in-place detection proximity switch 68 is installed at the end shaft of the guide cylinder.

[0047] like Figure 12 、 Figure 13 As shown, the horizontal eccentricity adjustment upper frame 4 includes two parallel upper load-bearing beams 41, one end of which is connected by an intermediate crossbeam 42, and the other end of which is connected by two curved beams 43. The two curved beams have the same curvature, and a sliding gap 44 is provided between the two curved beams 43. A swing mechanism 45 is provided above the two curved beams 43. The shape of the swing mechanism 45 corresponds to the two curved beams 43. A heavy-duty guide wheel 48 is provided below the swing mechanism 45. The swing mechanism 45 is slidingly arranged with the two curved beams 43.

[0048] A first through-hole is provided in the middle crossbeam 42, and a first screw 46 is disposed in the first through-hole. This first screw 46 secures the middle crossbeam 42 to the transverse beam 2, and serves as the center of rotation. A second through-hole is provided in the swing mechanism 45, and a second screw 47 is also disposed in the second through-hole. The end of the second screw 47 is fixedly connected to the T-shaped load-bearing beam 1.

[0049] In addition, a servo cylinder 18 is provided on the T-shaped load-bearing beam 1. One end of the cylinder body of the servo cylinder 18 is hinged on the T-shaped load-bearing beam 1. The output shaft of the servo cylinder 18 is hinged on the connecting frame 49. The connecting frame 49 is connected between the middle cross beam 42 and the arc beam 43. Figure 2 、 Figure 12 shown.

[0050] It should be noted that the two parallel upper load beams 41 are each provided with a detachable trolley connection point 7 at each end, through which the crane trolley is connected. Because the crane trolley is stationary, the quadrilateral structure consisting of the upper load beams 41, the middle crossbeam 42, and the two curved beams 43 does not experience eccentric displacement. Therefore, when the servo cylinder 18 is actuated, the lower T-shaped load beam 1, while fixed at one point, oscillates eccentrically within the sliding gap 44 along with the swing mechanism 45 at the other.

[0051] The working principle of the present invention is:

[0052] The object to be hoisted in this invention is a nuclear underwater storage tank. The tank has four lifting lugs on its upper portion, each with a lifting hole. Regardless of the tank type, four guide holes are fixed to its upper portion. The size of the guide holes does not vary with the tank type, and the guide holes provide a consistent load-bearing surface. In all cases, the height difference between the lifting holes and the load-bearing surface remains constant.

[0053] The sling of the present invention is made of all stainless steel, has four-point lifting and four-point anti-sway devices on the upper part, and has multi-point alignment and multi-point lifting on the lower part.

[0054] During operation, the crane drops straight down to the top of the storage tank, and the anti-sway wire rope plays an anti-sway role during the process of falling and positioning. The guide cone 52 is aligned with the guide hole on the storage tank. If there is a phase deviation, the servo cylinder 18 in the horizontal eccentric adjustment frame 4 will be actuated, and the servo cylinder 18 will push or pull the T-shaped load-bearing beam 1 to realize the eccentric rotation of the T-shaped load-bearing beam 1 around one end. The centering and deviation correction are realized through the movement of the heavy-duty guide wheel 48. After the four guide cones 52 are aligned, the crane continues to fall until the top pin 53 of the sling touches the bearing surface of the storage tank. After further falling, the top pin 53 of the sling moves up, which in turn drives the detection switch 57 to move up, triggering the detection switch 57 to detect and stop falling. Even if the crane falls further due to inertia, the upper and lower falling surfaces of the sling will contact the bearing surface to form a mechanical limit, and the fall is now complete.

[0055] Next, the motor reducer 16 on the T-shaped load-bearing beam 1 starts to operate, driving the Y-axis adjustment of the longitudinal beam 3 through the T-shaped lead screw 15. After the longitudinal beam 3 moves to the appropriate position on the Y-axis linear guide rail 13 of the load-bearing beam, the motor reducer 16 stops working. Then the X-axis adjustment reduction motor 66 is started. The X-axis adjustment reduction motor 66 is driven by the gear rack to drive the automatic shaft threading and detection device 6 to move. When the retracted position detection proximity switch 67 and the raised position detection proximity switch 68 in the automatic shaft threading and detection device 6 detect the alignment status with the lifting hole on the storage tank in real time, after alignment, the shaft threading reduction motor 64 is started, so that the shaft can pass through the lifting hole through the synchronous belt, and the hole is in place for detection and detection, and is fully engaged, thus completing the automatic alignment and connection process.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, and these should also be regarded as the scope of protection of the present invention.

Claims

1. A multi-point automatic alignment sling in a radiation environment, characterized by: The invention comprises T-shaped load-bearing beams (1) arranged in parallel, a transverse beam (2) being arranged between the T-shaped load-bearing beams (1), a longitudinal beam (3) being slidably arranged below the T-shaped load-bearing beams (1), and a horizontal eccentric adjustment upper frame (4) being arranged above the T-shaped load-bearing beams (1); a guide and detection device (5) being arranged below the T-shaped load-bearing beams (1), and an automatic shaft threading and detection device (6) being arranged below the longitudinal beams (3); Four trolley connection points (7) are provided on the horizontal eccentric adjustment upper frame (4), and the four trolley connection points (7) are suspended below the trolley of the crane through steel wire ropes; four anti-sway hanging points (8) are provided on the T-shaped load-bearing beam (1), and the four anti-sway hanging points (8) are cross-connected with four points on the sling; The T-shaped load-bearing beam (1) comprises two main load-bearing beams (11) arranged in parallel, a transverse beam (2) being arranged between the two main load-bearing beams (11), side beams (12) being arranged on both sides of each main load-bearing beam (11), and the two side beams and the middle main load-bearing beam (11) forming a T-shaped structure; a Y-direction linear slide rail (13) is arranged above the side beam (12), and a longitudinal beam (3) is slidably arranged on the Y-direction linear slide rail (13); A T-shaped lead screw (15) is installed between the middle transverse beam and the end transverse beam. The running transmission direction of the T-shaped lead screw (15) is Y-adjustable. One end of the T-shaped lead screw (15) is connected to the motor reducer (16). The other end of the T-shaped lead screw (15) is rotatably arranged on the end transverse beam. The motor reducer (16) drives the T-shaped lead screw (15) to rotate. A nut is provided on the T-shaped lead screw (15), and the nut is fixedly connected to the longitudinal beam (3). A guide leg (14) is provided below the main bearing beam (11). A guide and detection device (5) is provided on the guide leg (14). The guide and detection device (5) includes a guide cone crank arm (51), a guide cone (52) is provided below one end of the guide cone crank arm (51), a push pin (53) is provided below the other end of the guide cone crank arm (51), the upper portion of the push pin (53) passes through the guide cone crank arm (51) and is connected to the guide sleeve (54), and a push pin spring (55) is provided on the outer sleeve of the push pin (53) between the guide sleeve (54) and the guide cone crank arm (51); and a detection switch (57) is installed at the upper end of the guide sleeve (54); There are two longitudinal beams (3), each longitudinal beam (3) is vertically arranged with respect to the T-shaped load-bearing beam (1), and the longitudinal beam (3) includes a beam body (31), which is composed of two beams arranged in parallel, the ends of the two beams are connected together, and the middle of the two beams is hollow; a support structure (32) is fixedly arranged on the beam body (31), an automatic shaft threading and detection device (6) is arranged at the bottom of the support structure (32), a slider (33) is arranged on the upper part of the support structure (32), and the slider (33) is slidably arranged on the Y-direction linear slide rail (13); a connecting beam (34) is arranged between the left and right supporting structures (32), the connecting beam (34) is fixedly connected to a nut (39), and the nut (39) is connected to the T-shaped lead screw (15), and under the drive of the motor reducer (16), the force is transmitted through the T-shaped lead screw (15) to realize the Y-direction adjustment of the longitudinal beam (3); An X-direction linear slide rail (38) is installed on the beam body (31), and rack mounting frames (35) are provided on both sides of the beam body (31), a rack (36) is installed on the rack mounting frames (35), and the rack (36) is installed on the other side of the beam body (31); The automatic shaft threading and detection device (6) includes a moving frame (61), which is fixedly connected to the longitudinal beam (3); the moving frame (61) is a T-shaped structure, and an X-direction slider (62) is provided below the horizontal frame in the moving frame (61), and the X-direction slider (62) is slidably provided on the X-direction linear slide rail (38) of the longitudinal beam (3); a small gear (65) is provided on the top of the moving frame (61), and the small gear (65) is engaged with the rack (36) of the longitudinal beam (3), and the small gear (65) is driven by an X-direction adjustment reduction motor (66), and the X-direction adjustment reduction motor (66) is provided on the side of the moving frame (61); A guide cylinder (63) is provided at the bottom of the movable frame (61), and one end of the guide cylinder (63) is mounted on one side of the movable frame (61); a retracted position detection proximity switch (67) is mounted at the shaft extension on the other side of the movable frame (61), and a raised position detection proximity switch (68) is mounted at the end shaft of the guide cylinder; The horizontal eccentric adjustment upper frame (4) comprises two upper bearing beams (41) arranged in parallel, one end of the upper bearing beams (41) is connected by an intermediate cross beam (42), and the other end of the upper bearing beams (41) is connected by two arc beams (43), the curvature of the two arc beams is the same, and a sliding gap (44) is provided between the two arc beams (43); a swing mechanism (45) is provided above the two arc beams (43), the shape of the swing mechanism (45) corresponds to the two arc beams (43), a heavy-duty guide wheel (48) is provided below the swing mechanism (45), and the swing mechanism (45) is slidably provided with the two arc beams (43); A first through hole is provided on the middle cross beam (42), a first screw (46) is provided in the first through hole, and the middle cross beam (42) and the transverse beam (2) are fixed together by the first screw (46), and the first screw (46) serves as a rotation center; a second through hole is provided in the swing mechanism (45), a second screw (47) is also provided in the second through hole, and the end of the second screw (47) is fixedly connected to the T-shaped load-bearing beam (1); A servo cylinder (18) is provided on the T-shaped load-bearing beam (1), one end of the cylinder body of the servo cylinder (18) is hinged on the T-shaped load-bearing beam (1), and the output shaft of the servo cylinder (18) is hinged on the connecting frame (49), and the connecting frame (49) is connected between the middle cross beam (42) and the arc beam (43); Y-direction sliding blocks (17) are provided at the lower parts of both ends of the T-shaped load-bearing beam (1); X-direction buffer blocks (37) are respectively provided at both ends of the beam body (31).

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