Crane ladle turning trolley for slow cooling process of slag ladle

Abstract

The invention discloses a crane ladle turning trolley for a slag ladle slow cooling procedure, which comprises a walking trolley, a lifting appliance, a rail car assembly, a first lifting mechanism and a second lifting mechanism, the lifting appliance is put down through the first lifting mechanism, and then the second lifting mechanism is used for unhooking and ladle turning operation. Compared with an existing lifting hook and an existing rope which are easy to swing and not easy to take off the hook, when the device is used, hooking and unhooking can be achieved only by adjusting the position of the lifting appliance, enabling the cinder ladle to be located between the two side frames and driving the lifting hook, the swing amplitude is smaller, positioning is more accurate, and the positioning speed is higher and more convenient. And the swing arm beam can also achieve the purpose of turning over the ladle, so that the turning and dumping efficiency of the slag ladle is effectively improved, and the treatment efficiency of slag is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ladle treatment, and particularly to a crane turning ladle trolley for the ladle slow cooling process. Background Art

[0002] In the non-ferrous metallurgy field, a large amount of high-temperature molten slag is generated. It is an important part of the entire metallurgical process to use a ladle to receive the high-temperature slag and transfer the high-temperature ladle to the slow cooling field for spray slow cooling. When the RGV (Rail Guided Vehicle) transfers the fully loaded ladle to the slow cooling field, currently, a walking trolley moves along the gantry, and the ladle is hooked under the walking trolley through manual operation of unhooking and hooking. First, the ladle is transported into the slow cooling field, and then the ladle after standing for a period of time is hoisted to the slag dumping area again, and the ladle is turned over and dumped. After dumping, the empty ladle is placed back into the slow cooling field or on the RGV.

[0003] However, the ladle slow cooling field is outdoors, and the outdoor environment is complex, including non-directional winds, the movement of large and small vehicles, rain, heavy fog, and water mist caused by ladle spraying. The above complex situations will cause great interference to the line of sight of manual unhooking and hooking, resulting in too long unhooking and hooking time or unhooking and hooking mistakes. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a crane turning ladle trolley for the ladle slow cooling process.

[0005] A crane turning ladle trolley for the ladle slow cooling process provided by the present invention includes:

[0006] A walking trolley,

[0007] A spreader, which is arranged under the walking trolley and includes two side frames arranged along a first direction. The bottoms of the two side frames are rotatably connected with turntables. A swing arm beam is arranged between the two turntables. The swing arm beam is in a U shape, and its two ends are respectively connected with the two turntables. The tops of the two side frames are rotatably connected with hooks. The extending direction of the axis of the rotation shaft of the hook and the extending direction of the axis of the rotation shaft of the turntable are both the first direction;

[0008] Two rail vehicle assemblies, which are respectively arranged on both sides of the spreader along the first direction and include a rail vehicle main body, and a third traction rope and a fourth traction rope distributed on both sides of the turntable along a second direction. One ends of the third traction rope and the fourth traction rope are both connected with the rope grooves of the turntable, and the other ends are both connected with the rail vehicle main body;

[0009] A first hoisting mechanism, which is arranged on the walking trolley and is used to drive the spreader to reciprocate vertically;

[0010] The second lifting mechanism is used to drive the rail car assembly to move back and forth along the second direction, driving the third traction rope and the fourth traction rope to pull the turntable to rotate, thereby driving the hook to hook and the swing arm beam to flip, or the hook to unhook and the swing arm beam to reset.

[0011] According to the technical solution provided in the embodiment of the present application, a swing arc plate is provided at the ends of the swing arm beams that are close to each other, and a swing guide wheel is provided at the ends of the two hooks that are far away from each other. The axis extension direction of each swing guide wheel is a first direction, and the lower edge of the swing guide wheel can be rollingly connected to the top surface of the swing arc plate.

[0012] According to the technical solution provided in the embodiment of the present application, a connecting assembly is provided at the top of the two side frames, and the connecting assembly includes a rectangular frame provided at the top of the side frame, and a plurality of first movable pulleys are evenly arranged at the top of the rectangular frame;

[0013] The first lifting mechanism includes a first drum arranged on the traveling trolley, a plurality of lifting traction ropes are wound on the first drum, the first movable pulleys and the lifting traction ropes are of the same number and correspond one to one, and each lifting traction rope is wound out from the bottom end of the corresponding first movable pulley away from the end of the first drum and then connected to the bottom end of the traveling trolley.

[0014] According to the technical solution provided in the embodiment of the present application, the first lifting mechanism also includes a labor-saving pulley assembly, and the labor-saving pulley assembly includes a plurality of first fixed pulleys arranged at the bottom end of the traveling trolley. After each of the lifting traction ropes is wound around the bottom end of the corresponding first movable pulley, it wraps around the top end of the first fixed pulley and the bottom end of the first movable pulley several times, and then is connected to the bottom end of the traveling trolley.

[0015] According to the technical solution provided in the embodiment of the present application, the rail vehicle body includes a small pulley frame, the small pulley frame is in the shape of a >, a four-rope pulley is provided in the middle of the small pulley frame, and three-rope pulleys are provided at the top and bottom of the small pulley frame. The two side frames are provided with a first guide wheel near the three-rope pulley end along the second direction, and a second guide wheel is provided near the four-rope pulley end along the second direction. The top of the third traction rope of the two rail vehicle assemblies passes around the corresponding first guide wheel and the three-rope pulley, and the top of the fourth traction rope of the two rail vehicle assemblies passes around the corresponding second guide wheel and the two four-rope pulleys, and the top of the third traction rope and the fourth traction rope move synchronously with the rectangular frame.

[0016] According to the technical solution provided in the embodiment of the present application, a guide pulley component is provided on the rectangular frame, and the guide pulley component includes two limit frames arranged at the top of the rectangular frame along the first direction, and the limit frames include a plurality of steel pipes extending in the second direction, and end plate frames arranged at both ends of each of the steel pipes, and the rail vehicle body is arranged in the limit frames, and each of the steel pipes limits the shaking of the rail vehicle body along the first direction.

[0017] According to the technical solution provided in the embodiment of the present application, the second lifting mechanism further includes a second drum, on which two rope groups are wound at both ends along the first direction, and the two railcar assemblies correspond to the two rope groups respectively, and the two rope groups each include a fifth traction rope and a sixth traction rope with a winding direction opposite to that of the fifth traction rope;

[0018] One end of the rail vehicle body along the second direction is connected to the fifth traction rope, and the other end thereof is connected to the sixth traction rope.

[0019] According to the technical solution provided in the embodiment of the present application, the second drum is arranged on the traveling trolley, and the second lifting mechanism further comprises two sets of labor-saving pulley groups, one of the labor-saving pulley groups comprises a second fixed pulley arranged at the bottom end of the traveling trolley, and a second movable pulley arranged on the end plate frame, and the other labor-saving pulley group comprises a third fixed pulley arranged at the bottom end of the traveling trolley, and a third movable pulley arranged at the top end of the rectangular frame;

[0020] The sixth traction rope is wrapped around the bottom surface of the third movable pulley and the top surface of the third fixed pulley for several turns, and then passes through the rail vehicle body to be connected to the first drum. The fifth traction rope first passes through the rail vehicle body, and then wraps around the bottom surface of the second movable pulley and the top surface of the second fixed pulley for several turns, and then is connected to the first drum.

[0021] The number of turns of the fifth traction rope and the sixth traction rope is consistent with the number of turns of the lifting traction rope around the top end of the first fixed pulley and the bottom end of the first movable pulley, and the nominal diameters of the corresponding drums are consistent.

[0022] According to the technical solution provided in the embodiment of the present application, the rail vehicle body also includes a five-rope pulley arranged at one end of the small pulley frame along the second direction, and a six-rope pulley arranged at the other end, the five-rope pulley is provided with a guide wheel group on the side away from the six-rope pulley, the fifth traction rope is wrapped around the guide wheel group and the five-rope pulley when passing through the rail vehicle body, the sixth traction rope is provided with a fixed wheel at the end away from the five-rope pulley, and the sixth traction rope is wrapped around the fixed wheel and the six-rope pulley when passing through the rail vehicle body.

[0023] According to the technical solution provided in the embodiment of the present application, a buffer mechanism is provided in the middle part of the walking trolley, and the buffer mechanism includes an upper rectangular frame arranged at the top of the walking trolley, and a basic arm is rotatably connected to the bottom of the upper rectangular frame, and a two-section arm is slidably connected inside the basic arm, and the bottom end of the two-section arm is rotatably connected to the rectangular frame, and a buffer damper is provided on the top of the upper rectangular frame, and one end of the buffer damper is rotatably connected to the top of the two-section arm, and the extension direction of the rotation axis of the basic arm, the extension direction of the rotation axis of the bottom end of the two-section arm and the extension direction of the rotation axis of the end of the buffer damper are all the first direction.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. The present invention comprises a travelling trolley, a sling, a rail car assembly, a first lifting mechanism and a second lifting mechanism. The sling is lowered by the first lifting mechanism, and a hook is used for hooking. The travelling trolley drives the device as a whole to move on the gantry, and the slag bag is moved to the slag dumping area, and then the second lifting mechanism is used to perform the operations of unhooking and turning the bag. Compared with the existing hooks and ropes, which are easy to swing and difficult to unhook, when the present device is used, it is only necessary to adjust the position of the sling so that the slag bag is located between the two side frames, and the hook can be driven to achieve hooking and unhooking. The swing amplitude is smaller, the positioning is more accurate, and the positioning speed is faster and more convenient. Furthermore, on the basis of unhooking, the swing arm beam can also achieve the purpose of turning the bag, which effectively improves the efficiency of turning over and dumping the slag bag, and improves the slag processing efficiency.

[0026] 2. The swing arm beam is provided with a swing arc plate, and the hook is provided with a swing guide wheel. Before the swing arm beam turns over the bag, the lower edge of the swing guide wheel contacts the top surface of the swing arc plate. Under the action of gravity, the guide wheel arranged on the hook rolls along the top surface of the swing arc plate. When the hook swings to a vertical state, it is located below the hanging shaft, and the swing arc plate is separated from the swing guide wheel. At this time, the hooking step is completed. When turning over the bag, the swing arm beam continues to swing to push the slag bag to turn over the bag. When the swing arm beam is reset, the top of the swing arc plate contacts the lower edge of the swing guide wheel, pushing the hook to move away from the hanging shaft to achieve unhooking. With this structure, the bag can be turned over after hooking, and unhooked after resetting, thereby improving the hooking efficiency. The operation is simple, and only two operations are required. It is not easy to make wrong operations, thereby improving the efficiency of unhooking.

[0027] 3. The first lifting mechanism on the trolley will lift the connection components and the sling. Compared with direct lifting, the lifting traction rope can bypass the first movable pulley and connect with the trolley to achieve initial labor-saving lifting. Moreover, the first movable pulley is evenly arranged at the top of the rectangular frame to make the lifting and lowering more stable and reduce the local tilt. In addition, the first fixed pulley is also provided. By surrounding the first fixed pulley and the first movable pulley multiple times, the purpose of further labor saving is achieved, and the labor saving ratio is increased;

[0028] 4. A railcar assembly is provided, which is connected to the third traction rope through a three-rope pulley, and the fourth traction rope is connected to the four-rope pulley. When the railcar assembly moves to the left, it will pull the three traction ropes to drive the turntable to rotate counterclockwise, and the fourth traction rope will move synchronously with the railcar assembly and will not interfere with the rotation of the turntable. Similarly, when the railcar assembly moves to the right, it will drive the turntable to rotate clockwise. This structure can not only drive the turntable to rotate, but also the third traction rope and the fourth traction rope will not interfere with each other during the traction process, thereby improving the stability of the rotation;

[0029] 5. A second lifting mechanism is provided, and the rail vehicle assembly is pulled to move back and forth left and right by the fifth traction rope and the sixth traction rope. The two are wound around the second drum in the opposite direction, the fifth traction rope passes around the five-rope pulley, and the sixth traction rope passes around the six-rope pulley. The second drum rotates to reel in the fifth traction rope and release the sixth traction rope, and then the fifth traction rope will pull the rail vehicle assembly to move to the right. Similarly, after the second drum rotates in the opposite direction, the sixth traction rope is reeled in and the fifth traction rope is released, and the fifth traction rope will pull the rail vehicle assembly to the left, thereby realizing the stable movement of the rail vehicle assembly, and there will be no instability caused by one-way pulling, and there will be no interference and blocking caused by two-way pulling; further, in order to cooperate with the labor-saving pulley assembly of the first lifting mechanism and the descent of the rectangular frame, not only the other ends of the fifth traction rope and the sixth traction rope are arranged on the first drum, but also a second fixed pulley, a second movable pulley, a third positioning wheel and a third movable pulley are arranged, so that the fifth traction rope and the sixth traction rope can be wound along with the first drum, and there will be no interference effect caused by different labor-saving multiples;

[0030] 6. A buffer mechanism is provided. When the slag is poured out from the slag bag, a reaction force is generated. First, the second-section arm is inserted into the basic arm to preliminarily slow down the shaking of the sling and the connecting components. Furthermore, the buffer damper is connected to the basic arm. The swing of the second-section arm will drive the basic arm to shake. The buffer damper slows down the vibration of the basic arm, further alleviating the shaking of the second-section arm, thereby reducing the shaking, improving the stability of the sling and other components, and avoiding the situation where the slag bag shakes severely when only ropes are used.

[0031] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0033] Figure 1A schematic diagram of the structure of a crane-turned bag-turning trolley for a slag bag slow cooling process provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of a partial explosion structure of a crane bag turning trolley in a slag bag slow cooling process provided in an embodiment of the present application;

[0035] Figure 3 A schematic structural diagram of a swinging guide wheel and a swinging arc plate in a crane bag turning trolley for a slag bag slow cooling process provided in an embodiment of the present application;

[0036] Figure 4 A schematic structural diagram of a rail car assembly in a crane bag turning trolley for a slag bag slow cooling process provided in an embodiment of the present application;

[0037] Figure 5 A schematic diagram of the installation structure of a connecting plate in a crane bag turning trolley in a slag bag slow cooling process provided in an embodiment of the present application;

[0038] Figure 6 A schematic diagram of the structure of a buffer mechanism in a crane bag turning trolley in a slag bag slow cooling process provided in an embodiment of the present application;

[0039] Figure 7 A schematic diagram of the installation structure of the first traction rope in a crane bag turning trolley in a slag bag slow cooling process provided in an embodiment of the present application;

[0040] Figure 8 A schematic diagram of the installation structure of a second traction rope in a crane bag turning trolley in a slag bag slow cooling process provided in an embodiment of the present application;

[0041] Fig. 9 A schematic diagram of the installation structure of the fifth traction rope in a crane bag turning trolley in a slag bag slow cooling process provided in an embodiment of the present application;

[0042] Fig.10 A schematic diagram of the installation structure of the sixth traction rope in a crane bale turning trolley in a slag ladle slow cooling process provided in an embodiment of the present application.

[0043] Numbers in the figure:

[0044] 1. Walking trolley;

[0045] 2. First lifting mechanism; 21. First driving unit; 22. First drum; 23. First traction rope; 24. First rope end fixing member; 25. First fixed pulley; 26. Second traction rope; 27. First steering guide wheel;

[0046] 3. Connecting assembly; 31. Rectangular frame; 32. First movable pulley;

[0047] 4. Spreader; 41. Side frame; 42. Turntable; 43. Swing arm beam; 44. Hook; 45. Swing guide wheel; 46. Swing arc plate; 47. Second rope end fixing piece; 48. Third rope end fixing piece; 49. Annular baffle; 410. First guide wheel; 411. Second guide wheel;

[0048] 5. Guide pulley component; 51. Limit frame; 52. Connecting rod; 53. Connecting sheet metal; 54. Direction guide wheel; 55. Guide rail;

[0049] 6. Railcar assembly; 61. Third traction rope; 62. Fourth traction rope; 63. Small pulley frame; 64. Three-rope pulley; 65. Four-rope pulley; 66. Five-rope pulley; 67. Six-rope pulley; 68. Track wheel; 69. Connecting plate; 610. First linkage rope; 611. Second linkage rope;

[0050] 7. Second lifting mechanism; 71. Fifth traction rope; 72. Second fixed pulley; 73. Second movable pulley; 74. Fixed pulley; 75. Guide wheel group; 76. Sixth traction rope; 77. Third fixed pulley; 78. Third movable pulley; 79. Second drum; 710. Second driving unit; 751. First guide wheel; 752. Second guide wheel; 753. Third guide wheel; 754. Fourth guide wheel; 755. Fifth guide wheel; 756. Sixth guide wheel; 757. Seventh guide wheel;

[0051] 8. Buffer mechanism; 81. Upper rectangular frame; 82. Basic arm; 83. Second-section arm; 84. Buffer damper; 85. Lower rectangular frame;

[0052] 9. Slag bag; 91. Hanging scroll. DETAILED DESCRIPTION

[0053] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0054] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0055] Please refer to Figures 1 to 10 The embodiment of the present invention provides a crane-turned trolley for a slag ladle slow cooling process, comprising:

[0056] Walking car 1,

[0057] The lifting device 4 is arranged below the traveling trolley 1 and includes two side frames 41 arranged along the first direction. The bottoms of the two side frames 41 are rotatably connected with turntables 42. A swing arm beam 43 is arranged between the two turntables 42. The swing arm beam 43 is in a C shape, and its two ends are respectively connected with the two turntables 42. The tops of the two side frames 41 are rotatably connected with a hook 44. The extending direction of the axis of the rotating shaft of the hook 44 and the extending direction of the axis of the rotating shaft of the turntable 42 are both the first direction;

[0058] Two rail vehicle assemblies 6 are respectively arranged on both sides of the lifting device 4 along the first direction and include a rail vehicle main body, and a third towing rope 61 and a fourth towing rope 62 distributed on both sides of the turntable 42 along the second direction. One ends of the third towing rope 61 and the fourth towing rope 62 are both connected with the side surface of the turntable 42, and the other ends are both connected with the rail vehicle main body;

[0059] The first hoisting mechanism 2 is arranged on the traveling trolley 1 and is used to drive the lifting device 4 to reciprocate vertically;

[0060] The second hoisting mechanism 7 is used to drive the rail vehicle assembly 6 to reciprocate along the second direction, drive the third towing rope 61 and the fourth towing rope 62 to pull the turntable 42 to rotate, and then drive the hook 44 of the lifting hook to hook and the swing arm beam 43 to turn the package, or the hook 44 of the lifting hook to unhook and the swing arm beam 43 to reset; wherein, the first direction is Figure 1 the front-back direction in Figure 1 and the second direction is

[0061] As Figure 1-Figure 10 shown, the present invention includes a traveling trolley 1, a lifting device 4, a rail vehicle assembly 6, a first hoisting mechanism 2 and a second hoisting mechanism 7. The lifting device 4 is lowered through the first hoisting mechanism 2, and the hook 44 is used for hooking. The whole device is driven by the traveling trolley 1 to move on the gantry, and the slag package 9 is moved to the slag dumping area. Then, the operation of turning the package is carried out through the second hoisting mechanism 7. Compared with the existing hook body and rope which are easy to swing and not convenient for positioning and hooking and unhooking, when the device is in use, only the position of the lifting device 4 needs to be adjusted to make the slag package 9 located between the two side frames 41, and driving the hook 44 can realize hooking and unhooking, and its positioning is more accurate, and the positioning speed is faster and more convenient.

[0062] In some embodiments, as Figure 3As shown, a third rope end fixing part 48 is provided above the swing arm beam 43 corresponding to the turntable 42, and the third rope end fixing part 48 is used to fix the bottom end of the fourth traction rope 62, and a second rope end fixing part 47 is provided below the swing arm beam 43 corresponding to the turntable 42, and the second rope end fixing part 47 is used to fix the bottom end of the third traction rope 61, and annular baffles 49 are provided on the edges of the two end surfaces of the turntable 42, and the third traction rope 61 and the fourth traction rope 62 are restricted by the two annular baffles 49 to ensure that the third traction rope 61 can stably pull the turntable 42 to rotate counterclockwise, and the fourth traction rope 62 can stably drive the turntable 42 to rotate clockwise.

[0063] In some embodiments, the ends of the swing arm beams 43 close to each other are provided with swing arc plates 46, and the ends of the two hooks 44 far from each other are provided with swing guide wheels 45, the axis extension direction of each swing guide wheel 45 is the first direction, and the lower edge of the swing guide wheel 45 can be rollingly connected with the top surface of the swing arc plate 46;

[0064] like Figure 2 and Figure 3 As shown, before the swing arm beam 43 turns over the bag, the upper edge of the swing arc plate 46 contacts the top of the swing guide wheel 45, and the second lifting mechanism 7 drives the hook 44 to move toward the hanging shaft 91 of the slag bag 9, and the two are separated after the hook 44 moves to the bottom of the hanging shaft 91. After pulling the sling 4 upward, the hook 44 can lift the slag bag 9, and the subsequent swing arm beam 43 continues to swing to turn the bag over. During the resetting process of the swing arm beam 43, the top of the swing arc plate 46 contacts the upper edge of the swing guide wheel 45, pushing the hook 44 to move toward the side away from the hanging shaft 91 to achieve unhooking. Using this structure, the bag can be turned over after hooking, and unhooked after resetting, thereby improving the hooking efficiency. The operation is simple, only two operations are required, and incorrect operations are not prone to occur, thereby improving the efficiency of unhooking.

[0065] In some embodiments, a connection assembly 3 is provided at the top of the two side frames 41. The connection assembly 3 includes a rectangular frame 31 provided at the top of the side frame 41. A plurality of first movable pulleys 32 are evenly arranged at the top of the rectangular frame 31.

[0066] The first lifting mechanism 2 includes a first drum 22 provided on the traveling trolley 1, a plurality of lifting traction ropes are wound on the first drum 22, the number of the first movable pulleys 32 and the lifting traction ropes are the same and correspond one to one, and the ends of the lifting traction ropes away from the first drum 22 are wound out from the bottom ends of the corresponding first movable pulleys 32 and then connected to the bottom ends of the traveling trolley 1;

[0067] like Figure 2 , Figure 7 and Figure 8As shown, a plurality of first rope end fixing members 24 are provided at the top of the traveling trolley 1 for fixing each lifting traction rope. Optionally, four first movable pulleys 32 are provided, which are respectively located at the four corners of the rectangular frame 31 to ensure stable lifting. Two first traction ropes 23 and two second traction ropes 26 are wound on the first drum 22. In order to ensure that each lifting traction rope hangs vertically and ensure the stability of the lifting, the two first traction ropes 23 directly drop down and then pass around the two first movable pulleys 32 and then connect with the first rope end fixing member 24. The traveling trolley 1 is also provided with two first steering guide wheels 27. The two second traction ropes 26 first pass around the first steering guide wheel 27 in a horizontal direction and then pass downward around the two first movable pulleys 32 and then connect with the first rope end fixing member 24.

[0068] In some embodiments, the first lifting mechanism 2 further includes a labor-saving pulley assembly, which includes a plurality of first fixed pulleys 25 disposed at the bottom end of the traveling trolley 1. After each lifting traction rope is wound out from the bottom end of the corresponding first movable pulley 32, it passes around the top end of the first fixed pulley 25 and the bottom end of the first movable pulley 32 several times, and then is connected to the bottom end of the traveling trolley 1;

[0069] In some embodiments, the rail vehicle body includes a small pulley frame 63, which is in the shape of a >-shaped, a four-rope pulley 65 is provided in the middle of the small pulley frame 63, and three-rope pulleys 64 are provided at the top and bottom of the small pulley frame 63. The two side frames 41 are provided with a first guide wheel 410 near the end of the three-rope pulley 64 along the second direction, and a second guide wheel 411 is provided near the end of the four-rope pulley 65 along the second direction. The tops of the third traction ropes 61 of the two rail vehicle assemblies 6 are passed around the corresponding first guide wheel 410 and the three-rope pulley 64, and the tops of the fourth traction ropes 62 of the two rail vehicle assemblies 6 are passed around the corresponding second guide wheel 411 and the two four-rope pulleys 65, and the tops of the third traction rope 61 and the fourth traction rope 62 move synchronously with the rectangular frame 31;

[0070] like Figure 2 , Figure 3 and Figure 4 As shown, optionally, the top ends of the third traction rope 61 and the fourth traction rope 62 are fixedly connected to the rectangular frame 31, and the third traction rope 61 is wound around the left side and the top surface of the three-rope pulley 64, and then fixedly connected to the rectangular frame 31. When the rail vehicle body moves to the left, the three-rope pulley 64 will drive the third traction rope 61 to move to the left, and then the bottom end of the third traction rope 61 will pull the turntable 42 to rotate counterclockwise. Similarly, the fourth traction rope 62 is wound around the right side and the top surface of the upper four-rope pulley 65, and then fixedly connected to the rectangular frame 31. This is one of the optional options for synchronous movement.

[0071] In some embodiments, a guide pulley component 5 is provided on the rectangular frame 31, and the guide pulley component 5 includes two limit frames 51 provided at the top of the rectangular frame 31 along the first direction, and the limit frames 51 include a plurality of steel pipes extending in the second direction, and end plate frames provided at both ends of each steel pipe, and the rail vehicle body is provided in the limit frames 51, and each steel pipe limits the rail vehicle body from shaking along the first direction;

[0072] like Figure 2-Figure 5 As shown, the front and rear ends of the top of the small pulley frame 63 are restricted by two steel pipes, and the front and rear ends of the bottom are restricted by two steel pipes, thereby ensuring that the small pulley frame 63 does not rock back and forth.

[0073] In some embodiments, both ends of the two limiting frames 51 are provided with connecting sheet metal parts 53, and connecting rods 52 are provided between the connecting sheet metal parts 53 on the same side along the second direction; Figure 2-Figure 5 As shown, the limiting frame 51 is connected by a combination of a connecting rod 52 and a connecting sheet metal part 53 to realize a rectangular installation and improve the overall stability. Furthermore, in order to synchronize the top ends of the third traction rope 61 and the fourth traction rope 62 with the rectangular frame 31, preferably, a variable guide wheel 54 is provided in the middle of the four connecting sheet metal parts 53, a first linkage rope 610 is provided between the top ends of the two third traction ropes 61, the first linkage rope 610 is wound around the two rope grooves of the variable guide wheel 54 on the same side, and a second linkage rope 611 is provided between the top ends of the two fourth traction ropes 62, the second linkage rope 611 is wound around the two rope grooves of the variable guide wheel 54 on the other side. Because the guide pulley component 5 is installed on the rectangular frame 31, the first linkage rope 610 and the second linkage rope 611 are both installed between the variable guide wheels 54, thereby achieving the purpose of connecting the third traction rope 61 and the fourth traction rope 62 to the rectangular frame 31 and achieving the purpose of synchronous movement. This scheme combines the two third traction ropes 61 into a rope body through the first linkage rope 610, which is evenly stressed during pulling and has a better effect.

[0074] In some embodiments, the second lifting mechanism 7 further includes a second drum 79, on which two rope groups are wound at both ends along the first direction, and the two railcar assemblies 6 correspond to the two rope groups respectively, and both rope groups include a fifth traction rope 71 and a sixth traction rope 76 with a winding direction opposite to that of the fifth traction rope 71;

[0075] One end of the rail vehicle body along the second direction is connected to the fifth traction rope 71, and the other end thereof is connected to the sixth traction rope 76;

[0076] like Fig. 9 and Fig.10As shown, when the second drum 79 rotates counterclockwise, the fifth traction rope 71 will be driven to contract, thereby pulling the rail vehicle assembly 6 to the right. At this time, because the sixth traction rope 76 and the fifth traction rope 71 are wound in opposite directions, the sixth traction rope 76 will be released synchronously and will not interfere with the operation of the rail vehicle assembly 6. Similarly, when the second drum 79 rotates clockwise, the sixth traction rope 76 will contract, driving the rail vehicle assembly 6 to move to the left, and the fifth traction rope 71 will be released synchronously, ultimately achieving the purpose of left and right reciprocating movement of the rail vehicle assembly 6.

[0077] In some embodiments, the second drum 79 is arranged on the traveling trolley 1, and the second lifting mechanism 7 further comprises two sets of labor-saving pulley groups, one labor-saving pulley group comprises a second fixed pulley 72 arranged at the bottom end of the traveling trolley 1, and a second movable pulley 73 arranged on the end plate frame, and the other labor-saving pulley group comprises a third fixed pulley 77 arranged at the bottom end of the traveling trolley 1, and a third movable pulley 78 arranged at the top end of the rectangular frame 31;

[0078] The sixth traction rope 76 is wound around the bottom surface of the third movable pulley 78 and the top surface of the third fixed pulley 77 for several turns, and then passes through the rail vehicle body to be connected to the first drum 22. The fifth traction rope 71 first passes through the rail vehicle body, and then wraps around the bottom surface of the second movable pulley 73 and the top surface of the second fixed pulley 72 for several turns, and then is connected to the first drum 22.

[0079] The number of turns of the fifth traction rope 71 and the sixth traction rope 76 is consistent with the number of turns of the lifting traction rope around the top of the first fixed pulley 25 and the bottom of the first movable pulley 32, and the nominal diameters of the corresponding drums are consistent; that is, the nominal diameters of the first drum 22 and the second drum 79 are consistent;

[0080] like Figure 4 , Fig. 9 and Fig.10 As shown, since the second drum 79 is arranged on the traveling trolley 1, if the fifth traction rope 71 and the sixth traction rope 76 are fixed on the traveling trolley 1 or the rectangular frame 31, when the first drum 22 releases the lifting traction rope, the fifth traction rope 71 and the sixth traction rope 76 cannot move synchronously, causing interference with the lifting of the rectangular frame 31. Therefore, a third fixed pulley 77 and a third movable pulley 78 are arranged, and the number of winding circles is consistent with the number of winding circles of the labor-saving pulley assembly, that is, the winding ratio is the same, and the nominal diameters of the corresponding drums are The diameters are consistent. At this time, when the first drum 22 releases the lifting traction rope, the second drum 79 remains stationary. At this time, the first drum 22 will also synchronously release the fifth traction rope 71 and the sixth traction rope 76. At this time, the lengths of the ropes released are consistent, and there will be no interference. When the lifting is completed, the second drum 79 is rotated again, and the other ends of the fifth traction rope 71 and the sixth traction rope 76 remain stationary, so that the fifth traction rope 71 and the sixth traction rope 76 are contracted and extended by one, thereby achieving the purpose of pulling the rail car assembly 6.

[0081] In some embodiments, the rail vehicle body further includes a five-rope pulley 66 disposed at one end of the small pulley frame 63 along the second direction, and a six-rope pulley 67 disposed at the other end. The five-rope pulley 66 is provided with a guide wheel group 75 on the side away from the six-rope pulley 67. When the fifth traction rope 71 passes through the rail vehicle body, it is arranged around the guide wheel group 75 and the five-rope pulley 66. The sixth traction rope 76 is provided with a fixed wheel 74 at the end away from the five-rope pulley 66. When the sixth traction rope 76 passes through the rail vehicle body, it is arranged around the fixed wheel 74 and the six-rope pulley 67.

[0082] like Figure 4 , Fig. 9 and Fig.10 As shown, if the sixth traction rope 76 passes through the rail vehicle body, that is, the sixth traction rope 76 directly surrounds the six-rope pulley 67 for one circle, the transmission resistance is large, which is not conducive to pulling the rail vehicle assembly 6 to move. Therefore, a fixed wheel 74 is provided, and the sixth traction rope 76 is looped several times between the six-rope pulley 67 and the fixed wheel 74 to simulate the movable pulley group, thereby achieving a labor-saving effect and making it easier for the sixth traction rope 76 to pull the rail vehicle assembly 6 more smoothly. Similarly, a guide wheel group 75 is provided, and optionally The guide wheel group 75 is a winding wheel, and the fifth traction rope 71 is wound several times between the five-rope pulley 66 and the winding wheel, which serves the purpose of simulating a movable pulley group and achieving a labor-saving effect. Further preferably, two five-rope pulleys 66 are provided, which are respectively located at the front end and the rear end of the small pulley frame 63, and the guide wheel group 75 includes a first guide wheel 751, a second guide wheel 752, a third guide wheel 753, a fourth guide wheel 754, a fifth guide wheel 755, a sixth guide wheel 756 and a seventh guide wheel 757. Figure 4 After being released from the first drum 22, the fifth traction rope 71 passes through the seventh guide wheel 757 and the five-rope pulley 66 from left to right, and passes through the sixth guide wheel 756, and then passes through the five-rope pulley 66 again. Then, the fifth traction rope 71 is guided around the fifth guide wheel 755 and led to the back end of the small pulley frame 63, around the five-rope pulley 66 at the back end, and then around the fourth guide wheel 754, and from the top of the fourth guide wheel 754, it goes back to the bottom of the five-rope pulley 66 at the back end, and goes out from the bottom of the five-rope pulley 66 to the third guide wheel 753, and then goes around the third guide wheel 753 to the second guide wheel 752, and then goes back to the first guide wheel 751 from the second guide wheel 752. As a kind of labor-saving pulley group, it also plays a labor-saving role and improves the smoothness and stability of pulling. In addition, the guide wheel group 75 can also be other labor-saving pulley wheel groups, which mainly play a labor-saving purpose.

[0083] In some embodiments, a buffer mechanism 8 is provided in the middle of the traveling trolley 1, and the buffer mechanism 8 includes an upper rectangular frame 81 provided at the top of the traveling trolley 1, and a basic arm 82 is rotatably connected to the bottom of the upper rectangular frame 81, and a two-section arm 83 is connected inside the basic arm 82, and the bottom end of the two-section arm 83 is rotatably connected to the rectangular frame 31, and a buffer damper 84 is provided on the top of the upper rectangular frame 81, and one end of the buffer damper 84 is rotatably connected to the top of the basic arm 82, and the extension direction of the rotation axis of the basic arm 82, the extension direction of the rotation axis of the bottom end of the two-section arm 83, and the extension direction of the rotation axis of the end of the buffer damper 84 are all the first direction;

[0084] like Figure 2 and Figure 6 When the slag is poured out from the slag bag 9, a reaction force will be generated. First, the second arm 83 is inserted into the basic arm 82 to initially slow down the shaking of the hanger 4 and the connecting assembly 3. Furthermore, the buffer damper 84 is connected to the basic arm 82, and the swing of the second arm 83 will drive the basic arm 82 to shake. The buffer damper 84 slows down the vibration of the basic arm 82, and further alleviates the shaking of the second arm 83, thereby reducing the shaking, improving the stability of the hanger 4 and other components, and avoiding the situation where the slag bag 9 shakes severely when only ropes are used; in addition, in order to facilitate the connection between the second arm 83 and the rectangular frame 31, a lower rectangular frame 85 is provided in the middle of the rectangular frame 31, and the bottom end of the second arm 83 is rotatably connected to the lower rectangular frame 85. Furthermore, a plurality of auxiliary rollers are provided inside the basic arm 82, and the outer wall of the second arm 83 of the roller abuts, which serves to stabilize the second arm 83, avoid collision and friction between it and the inner wall of the basic arm 82, and ensure the stable up and down movement of the second arm 83.

[0085] In some embodiments, a guide rail 55 is further provided between the two end plate frames, and the rail vehicle body further includes a rail wheel 68 provided on the guide rail 55, the extension direction of the guide rail 55 is the second direction, and the extension direction of the axis of the rotating shaft of the rail wheel 68 is the first direction. Figure 4 and Figure 5 As shown, the guide wheel 55 guides the track wheel 68, so that the track vehicle body moves with rolling friction instead of sliding friction, with less resistance and more stable movement. Furthermore, the front and rear ends of the small pulley frame 63 are provided with connecting plates 69, and the six-rope pulley 67 is installed between the two connecting plates 69. The guide rail 55 is on the front and rear sides of the track vehicle body, and four track wheels 68 are arranged, two on the front guide rail 55, and two on the rear guide rail 55. Further, optionally, one group of track wheels 68 is installed on both ends of the mounting shaft of the six-rope pulley 67, and the other end track wheel 68 is installed on both ends of the mounting shaft of the three-rope pulley 64.

[0086] In some embodiments, the first lifting mechanism 2 also includes a first driving unit 21, and the second lifting mechanism 7 also includes a second driving unit 710. The first driving unit 21 is used to drive the first reel 22 to rotate, and the second driving unit 710 is used to drive the second reel 79 to rotate. The first driving unit 21 and the second driving unit 710 are both composed of a motor, a coupling and a reducer, and are conventional motor drive devices.

[0087] The use process of this device:

[0088] Step 1: Move the walking trolley 1 along the gantry to the top of the slag bag 9, then start the first driving unit 21, the first drum 22 releases the first traction rope 23, the second traction rope 26, the fifth traction rope 71 and the sixth traction rope 76, and the connecting assembly 3, the guide pulley component 5 and the sling 4 move downward synchronously, so that the slag bag 9 falls between the two side frames 41;

[0089] Step 2: Start the second driving unit 710 to drive the second drum 79 to rotate clockwise, the sixth traction rope 76 will shrink, drive the railcar assembly 6 to move leftward, and the three-rope pulley 64 on the railcar assembly 6 will drive the third traction rope 61 to move leftward, so that the bottom end of the third traction rope 61 pulls the turntable 42 to rotate counterclockwise;

[0090] Step 3: The counterclockwise rotating turntable 42 will drive the swing arm beam 43 to swing synchronously, and the upper surface of the swing arc plate 46 arranged on the swing arm beam 43 will contact the bottom of the swing guide wheel 45. The hook 44 moves toward the hanging shaft 91 of the slag bag 9 under the action of its own weight. When the hook 44 is located below the hanging shaft 91, the swing arc plate 46 and the swing guide wheel 45 are disengaged, the second driving part 710 is shut down, and the first driving part 21 is started. The first reel 22 retracts the released first traction rope 23, the second traction rope 26, the fifth traction rope 71 and the sixth traction rope 76, and drives the sling 4 and the hook 44 to move upward, so that the hook 44 hooks the hanging shaft 91, and drives the slag bag 9 to rise to the specified position;

[0091] Step 4: After the slag bag 9 rises to the designated position, the first driving part 21 is closed, and the traveling trolley 1 is started. The traveling trolley 1 moves along the gantry, and the slag bag 9 is moved to the slag dumping area, and then the traveling trolley 1 is stopped;

[0092] Step 5: Start the second driving unit 710 to drive the second reel 79 to continue to rotate clockwise, and the swing arm beam 43 continues to swing to support the bottom of the slag bag 9, so that the slag bag 9 rotates around the hanging shaft 91, and the slag is poured out from the slag bag 9;

[0093] Step 6: Start the second driving unit 710 to drive the second drum 79 to rotate counterclockwise, the fifth traction rope 71 will shrink, drive the railcar assembly 6 to move rightward, and the four-rope pulley 65 on the railcar assembly 6 will drive the fourth traction rope 62 to move rightward, so that the bottom end of the fourth traction rope 62 pulls the turntable 42 to rotate clockwise, and the swing arm beam 43 will rotate and reset with the turntable 42, and the slag bag 9 will rotate under the action of gravity to restore the original state of opening upward, completing the return to the original state;

[0094] Step 7: The slag bag 9 is transported back to the original position by the first lifting mechanism 2 and the traveling trolley 1, including the first drum 22 retracting the rope to pull up the slag bag 9, and then the traveling trolley 1 moves back to the original position along the gantry, and then the first drum 22 is activated to lower the slag bag 9 to the ground;

[0095] Step eight, start the second driving part 710, drive the second reel 79 to rotate counterclockwise, the fifth traction rope 71 will shrink, drive the rail car assembly 6 to move to the right, the four-rope pulley 65 on the rail car assembly 6 will drive the fourth traction rope 62 to move to the right, and then the bottom end of the fourth traction rope 62 will pull the turntable 42 to rotate clockwise, and the swing arm beam 43 will drive the top end of the swing arc plate 46 to contact the bottom end of the swing guide wheel 45, pushing the hook 44 to move away from the hanging shaft 91 to achieve unhooking.

[0096] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0097] In the description of this specification, the description of the terms "one embodiment", "some embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0098] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A crane-operated trolley for slag ladle slow cooling process, characterized in that: Including: A walking trolley (1), A spreader (4), which is arranged below the walking trolley (1) and includes two side frames (41) arranged along a first direction. The bottoms of the two side frames (41) are rotatably connected with turntables (42). A swing arm beam (43) is arranged between the two turntables (42). The swing arm beam (43) is in a C shape, and its two ends are respectively connected with the two turntables (42). The tops of the two side frames (41) are rotatably connected with hooks (44). The extending direction of the axis of the rotation shaft of the hook (44) and the extending direction of the axis of the rotation shaft of the turntable (42) are both the first direction; Two rail car assemblies (6), which are respectively arranged on both sides of the spreader (4) along the first direction and include a rail car body, and a third towing rope (61) and a fourth towing rope (62) distributed on both sides of the turntable (42) along a second direction. One ends of the third towing rope (61) and the fourth towing rope (62) are both connected with the rope grooves of the turntable (42), and the other ends are both connected with the rail car body; A first lifting mechanism (2), which is arranged on the walking trolley (1) and is used to drive the spreader (4) to reciprocate vertically; A second lifting mechanism (7), which is used to drive the rail car assembly (6) to reciprocate along the second direction, drive the third towing rope (61) and the fourth towing rope (62) to pull the turntable (42) to rotate, and then drive the hook (44) to hook and the swing arm beam (43) to turn the package, or the hook (44) to unhook and the swing arm beam (43) to reset.

2. The crane bag turning trolley for the slag bag slow cooling process according to claim 1 is characterized in that: Swing arc plates (46) are arranged at the mutually approaching ends of the swing arm beam (43). Swing guide wheels (45) are arranged at the mutually remote ends of the two hooks (44). The extending direction of the axis of each swing guide wheel (45) is the first direction. The lower edge of the swing guide wheel (45) can be in rolling connection with the top surface of the swing arc plate (46).

3. The crane-type bag turning trolley for the slag bag slow cooling process according to claim 1 is characterized in that: Connection assemblies (3) are arranged at the tops of the two side frames (41). The connection assemblies (3) include rectangular frames (31) arranged at the tops of the side frames (41). A plurality of first movable pulleys (32) are evenly arranged at the tops of the rectangular frames (31); The first lifting mechanism (2) includes a first winding drum (22) arranged on the walking trolley (1). A plurality of lifting towing ropes are wound on the first winding drum (22). The number of the first movable pulleys (32) is the same as that of the lifting towing ropes and they correspond one by one. The ends of the lifting towing ropes away from the first winding drum (22) all wind out from the bottoms of the corresponding first movable pulleys (32) and then are connected with the bottom end of the walking trolley (1).

4. The crane bag turning trolley for the slag bag slow cooling process according to claim 3 is characterized in that: The first lifting mechanism (2) further includes a force-saving pulley assembly. The force-saving pulley assembly includes a plurality of first fixed pulleys (25) arranged at the bottom end of the walking trolley (1). After each lifting towing rope winds out from the bottom end of the corresponding first movable pulley (32), it winds around the top end of the first fixed pulley (25) and the bottom end of the first movable pulley (32) for several times and then is connected with the bottom end of the walking trolley (1).

5. The crane bag turning trolley for the slag bag slow cooling process according to claim 3 is characterized in that: The rail vehicle body comprises a small pulley frame (63), the small pulley frame (63) is in the shape of a >, a four-rope pulley (65) is provided in the middle of the small pulley frame (63), and three-rope pulleys (64) are provided at the top and bottom of the small pulley frame (63). The two side frames (41) are provided with a first guide wheel (410) near the end of the three-rope pulley (64) along the second direction, and a second guide wheel (411) is provided near the end of the four-rope pulley (65) along the second direction. The tops of the third traction ropes (61) of the two rail vehicle assemblies (6) are passed around the corresponding first guide wheel (410) and the three-rope pulley (64), and the tops of the fourth traction ropes (62) of the two rail vehicle assemblies (6) are passed around the corresponding second guide wheel (411) and the two four-rope pulleys (65). The tops of the third traction ropes (61) and the fourth traction ropes (62) move synchronously with the rectangular frame (31).

6. The crane-operated bag turning trolley for the slag bag slow cooling process according to claim 3, characterized in that: The rectangular frame (31) is provided with a guide pulley component (5), and the guide pulley component (5) includes two limit frames (51) arranged at the top of the rectangular frame (31) along the first direction, and the limit frames (51) include a plurality of steel pipes extending in the second direction, and end plate frames arranged at both ends of each of the steel pipes. The rail vehicle body is arranged in the limit frames (51), and each of the steel pipes limits the rail vehicle body from shaking along the first direction.

7. The crane-operated bag turning trolley for the slag bag slow cooling process according to claim 4, characterized in that: The second lifting mechanism (7) further comprises a second drum (79), two rope groups are wound around the second drum (79) at both ends along the first direction, the two railcar assemblies (6) correspond to the two rope groups respectively, and the two rope groups each comprise a fifth traction rope (71) and a sixth traction rope (76) having a winding direction opposite to that of the fifth traction rope (71); One end of the rail vehicle body along the second direction is connected to the fifth traction rope (71), and the other end is connected to the sixth traction rope (76).

8. The crane-operated bag turning trolley for the slag bag slow cooling process according to claim 7, characterized in that: The second drum (79) is arranged on the traveling trolley (1), and the second lifting mechanism (7) also includes two groups of labor-saving pulley groups, one of the labor-saving pulley groups includes a second fixed pulley (72) arranged at the bottom end of the traveling trolley (1), and a second movable pulley (73) arranged on the end plate frame, and the other labor-saving pulley group includes a third fixed pulley (77) arranged at the bottom end of the traveling trolley (1), and a third movable pulley (78) arranged at the top end of the rectangular frame (31); The sixth traction rope (76) is wound around the bottom surface of the third movable pulley (78) and the top surface of the third fixed pulley (77) for several turns, and then passes through the rail vehicle body to be connected to the first drum (22); the fifth traction rope (71) first passes through the rail vehicle body, and then wraps around the bottom surface of the second movable pulley (73) and the top surface of the second fixed pulley (72) for several turns, and then is connected to the first drum (22); The number of turns of the fifth traction rope (71) and the sixth traction rope (76) is consistent with the number of turns of the lifting traction rope around the top end of the first fixed pulley (25) and the bottom end of the first movable pulley (32), and the nominal diameters of the corresponding drums are consistent.

9. The crane bag turning trolley for the slag bag slow cooling process according to claim 8, characterized in that: The rail vehicle body also includes a five-rope pulley (66) arranged at one end of the small pulley frame (63) along the second direction, and a six-rope pulley (67) arranged at the other end. The five-rope pulley (66) is provided with a guide wheel group (75) on the side away from the six-rope pulley (67). When the fifth traction rope (71) passes through the rail vehicle body, it is surrounded by the guide wheel group (75) and the five-rope pulley (66). The sixth traction rope (76) is provided with a fixed wheel (74) at the end away from the five-rope pulley (66). When the sixth traction rope (76) passes through the rail vehicle body, it is surrounded by the fixed wheel (74) and the six-rope pulley (67).

10. The crane-operated bag turning trolley for the slag bag slow cooling process according to claim 3, characterized in that: A telescopic arm mechanism (8) is provided in the middle of the walking trolley (1), and the telescopic arm mechanism (8) comprises an upper rectangular frame (81) arranged at the top of the walking trolley (1); a basic arm (82) is rotatably connected to the bottom of the upper rectangular frame (81); a two-section arm (83) is slidably connected inside the basic arm (82); the bottom end of the two-section arm (83) is rotatably connected to the rectangular frame (31); a buffer damper (84) is provided at the top of the upper rectangular frame (81); one end of the buffer damper (84) is rotatably connected to the top of the basic arm (82); the extension direction of the rotation axis of the basic arm (82), the extension direction of the rotation axis of the bottom end of the two-section arm (83) and the extension direction of the rotation axis of the end of the buffer damper (84) are all the first direction.

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