Automatic grabbing and unlocking of large crucible tower hoist

Abstract

The application discloses a large-scale crucible tower type hoisting device capable of automatic grabbing and unlocking, and belongs to the technical field of lifting devices.The hoisting device comprises a hoisting assembly, an anti-skid hook group and a prong type fixed-angle rotating mechanism.The anti-skid hook group comprises a plurality of hooks, an anti-falling tower ring and an axial intermittent limiting mechanism.The anti-falling tower ring is horizontally arranged, the hooks are uniformly and interval arranged on the anti-falling tower ring, the hooks are connected with the hoisting assembly through chains, the axial intermittent limiting mechanism is arranged above the anti-falling tower ring, the axial intermittent limiting mechanism is connected with the anti-falling tower ring through a fixing rod, and the axial intermittent limiting mechanism is connected with all the hooks.The prong type fixed-angle rotating mechanism is connected with the hoisting assembly and the axial intermittent limiting mechanism.The hoisting device can realize automatic grabbing and unlocking of the large-scale crucible through its own gravity and upward tension, an operator does not need to hang the hooks on the crucible at a close distance, the risk of scalding is avoided, and the hoisting safety of the large-scale crucible is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting tools, and in particular to a large crucible tower lifting device capable of automatically grabbing and unlocking. Background Art

[0002] There are 3-6 hanging holes on the flange edge of the large crucible mouth. When hanging the crucible, buckle a group of 3-6 hanging hooks into the hanging holes of the crucible mouth, and then insert the limiting pins into the limiting holes of the hooks and the crucible mouth. Figure 1 As shown, the crucible can be locked firmly and the hook can be prevented from slipping during lifting.

[0003] Although the hook lifting function of traditional large crucible lifting devices can be realized, the main disadvantage is that the installation and removal of the hook is cumbersome, time-consuming and labor-intensive. At the same time, due to the high temperature of the crucible, the operator is at high risk of burns when installing the hook and limit pin, and the safety is low. The safety of the operator is even less guaranteed in an environment with restricted vision. Summary of the Invention

[0004] The purpose of the present invention is to provide a large crucible tower lifting device with automatic grasping and unlocking, so as to solve the problem that during the existing large crucible lifting process, the operator has to install the hook and limit pin at close range, which is cumbersome, time-consuming and labor-intensive, and has a high risk of burns.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A large crucible tower lifting device with automatic grasping and unlocking, comprising: a lifting assembly, an anti-slip hook assembly, and a fork-type fixed-angle rotating mechanism;

[0007] The anti-slip hook assembly includes: multiple hooks, anti-slip tower rings and axial discontinuity limit mechanisms;

[0008] The anti-drop tower ring is set horizontally, and all the hooks are evenly spaced on the anti-drop tower ring. The hooks are connected to the lifting assembly through chains. The axial intermittent limiting mechanism is located above the anti-drop tower ring. The axial intermittent limiting mechanism is connected to the anti-drop tower ring through a fixed rod, and the axial intermittent limiting mechanism is connected to all the hooks.

[0009] The fork-type fixed-angle rotating mechanism is connected to the lifting assembly and the axial discontinuous limiting mechanism respectively;

[0010] The lifting and lowering of the lifting components causes the hook to automatically grab and unlock.

[0011] Furthermore, the above-mentioned hook includes a limiting part, a lifting part, an anti-slip part and a grabbing part which are connected in sequence; the limiting part is provided with a limiting hole, the lifting part is provided with a lifting hole, the anti-slip part is provided with an anti-slip hole, and the grabbing part is provided with a grabbing hook; the axial intermittent limiting mechanism is hinged to the limiting part at the limiting hole, the chain is hinged to the lifting part at the lifting hole, the anti-slip tower ring is hinged to the anti-slip part at the anti-slip hole, and the grabbing hook and the anti-slip tower ring are spaced apart in the vertical direction; when the anti-slip hole is used as the rotation fulcrum, the limiting part and the lifting part rotate downward.

[0012] Furthermore, the above-mentioned axial discontinuity limiting mechanism includes a stabilizing disk, a rotating disk and multiple sets of sliding components;

[0013] The bottom of the stabilizing plate is connected to the anti-fall-off tower ring through a fixing rod;

[0014] The rotating disk is located on top of the stabilizing disk and rotates with the rotating disk; the stabilizing disk and the rotating disk are respectively provided with slots and holes with the same number as the sliding components;

[0015] The number of sliding assemblies is consistent with the number of hooks and corresponds one to one. The sliding assembly includes a guide sleeve and a sliding rod; the guide sleeve extends into the through groove and is hinged to the stabilizing disk, the top of the sliding rod slides with the guide sleeve and passes through the through hole, and the bottom of the sliding rod is hinged to the limiting part at the limiting hole.

[0016] Furthermore, mounting ears are respectively provided on both sides of all the above-mentioned through slots, and the mounting ears are arranged on the bottom side of the stabilizing plate. The mounting ears of the same through slot are rotatably connected to the guide sleeve through a guide sleeve pin.

[0017] Furthermore, a plurality of stabilizing disc ears are provided on the outer side of the stabilizing disc, and the stabilizing disc ears are connected to limiting rollers through stabilizing disc ear pins. The limiting rollers are in contact with the rotating disc to limit the rotation of the rotating disc along its central axis.

[0018] Furthermore, the fork-type fixed-angle rotation mechanism comprises: a slide rail sleeve, a pull rod, an indexing fork and a shift rod;

[0019] The slide rail sleeve is provided with a linear guide rail and an inclined guide rail in sequence from the top thereof. The top end of the inclined guide rail is connected to the bottom end of the linear guide rail. The axial length of the inclined guide rail is greater than the width of the linear guide rail. The top of the slide rail sleeve is also provided with a plurality of limit grooves at even intervals.

[0020] The indexing fork is sleeved on the pull rod and slides into the slide rail sleeve. The indexing fork is provided with fork grooves whose number and distribution are consistent with the limit grooves from its bottom end to form multiple fork blocks. The outer side of the top of the indexing fork is provided with an outer ring protrusion that matches the limit groove.

[0021] The shift rod is sleeved at the bottom end of the pull rod and connected to the pull rod through a shift rod pin. The shift rod pin is in sliding cooperation with the linear guide rail. The top end of the shift rod extends into the interior of the indexing fork and is provided with a shift block that is in sliding cooperation with the fork groove.

[0022] The outer side of the slide rail sleeve is connected with a dust cover, which is fixedly connected to the bottom of the stable disk; the indexing fork slides with the rotating disk to drive the rotating disk to rotate, and the pull rod passes through the stable disk and the rotating disk.

[0023] Furthermore, guide slopes are respectively provided on both sides of the above-mentioned limit groove, and the inclination angle of the guide slopes is 30° to 60°; the bottom width of the limit groove is greater than the width of the outer ring protrusion > the width of the linear guide rail > the diameter of the shift rod pin; a rotating block is provided at the bottom center of the rotating disk, the rotating block passes through the stabilizing disk, a connecting block is provided on the outside of the rotating block, and an inner ring groove is provided on the inner side of the top of the indexing fork, which slides with the connecting block.

[0024] Furthermore, the above-mentioned hoisting assembly is connected to the top of the pull rod through a multi-directional displacement compensation mechanism;

[0025] The multi-directional displacement compensation mechanism includes: an upper pull rod connected to the lifting assembly, a displacement compensation sleeve and a lower pull rod connected to the top of the pull rod; the upper pull rod extends from one end of the displacement compensation sleeve and slides and rotates with the displacement compensation sleeve, and the lower pull rod extends from the other end of the displacement compensation sleeve and is connected to the displacement compensation sleeve through a lower pull rod pin; the outer diameter of the lower pull rod is smaller than the inner diameter of the displacement compensation sleeve, and the lower pull rod slides with the lower pull rod pin.

[0026] Furthermore, the lower pull rod and the pull rod are integrally formed.

[0027] Furthermore, the above-mentioned lifting assembly includes a lifting ring and a lifting plate connected to the bottom of the lifting ring; the lifting ring is also connected to the fork-type fixed-angle rotation mechanism, and the lifting plate is connected to the chain.

[0028] The present invention has the following beneficial effects:

[0029] (1) The lifting device of the present invention is a purely mechanical structure. The fork-type fixed-angle rotating mechanism can be rotated at a fixed angle only by its own gravity and upward pulling force, thereby driving the sliding rod of the axial discontinuous limiting mechanism to perform axial discontinuous limiting. Combined with the action of gravity, the large crucible can be automatically grasped and unlocked. The operator does not need to hang the hook on the crucible at close range, which avoids the risk of burns and increases the safety of lifting the large crucible. In addition, the entire lifting process is simple and easy to operate.

[0030] (2) The lifting device of the present invention is a purely mechanical structure. Since the temperature of a large crucible is often high during the lifting process, compared with the electric control method, the lifting device of the present invention has a simpler structure, is easier to maintain, has a lower cost, and has a longer life in a high-temperature environment.

[0031] (3) All the hooks of the present invention are arranged on the anti-slip tower ring. The anti-slip tower ring has a positioning function for the hook to prevent the hook from being separated from the crucible during the lifting process. At the same time, the anti-slip tower ring and the grab hook have a limiting function on the mouth of the crucible to prevent slipping during the lifting process, thereby improving the safety of lifting.

[0032] (4) The present invention can compensate for circumferential angle, vertical displacement, axial displacement and radial displacement through a multi-directional displacement compensation mechanism, and is used to cooperate with a fork-type fixed-angle rotation mechanism to compensate for the displacement of the fork-type fixed-angle rotation mechanism in multiple directions, so that the fork-type fixed-angle rotation mechanism can work smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of traditional crucible hoisting;

[0034] Figure 2 This is a schematic structural diagram of the large crucible tower lifting device with automatic grasping and unlocking according to the present invention;

[0035] Figure 3 It is a structural schematic diagram of the anti-slip hook assembly of the present invention;

[0036] Figure 4 It is a structural schematic diagram of the hook of the present invention;

[0037] Figure 5 It is a schematic diagram of the partitions of the hook of the present invention;

[0038] Figure 6 It is a schematic diagram of the connection between the hook and the chain, the axial discontinuity limiting mechanism and the anti-slip tower ring of the present invention;

[0039] Figure 7 It is a structural schematic diagram of the axial discontinuity limiting mechanism of the present invention;

[0040] Figure 8 It is a structural schematic diagram of the stabilizing disk of the present invention;

[0041] Figure 9 It is a structural schematic diagram of the rotating disk of the present invention;

[0042] Figure 10 It is a schematic diagram of the connection between the axial discontinuous limiting mechanism and the fork-type fixed-angle rotation mechanism of the present invention;

[0043] Figure 11 It is a schematic diagram of the connection structure between the dust cover of the fork type fixed angle rotation mechanism of the present invention and the axial discontinuous limit mechanism when it is disengaged;

[0044] Figure 12 It is a structural schematic diagram of the fork type fixed angle rotation mechanism of the present invention;

[0045] Figure 13 It is a schematic diagram of the exploded structure of the fork type fixed angle rotation mechanism of the present invention;

[0046] Figure 14 This is a schematic diagram of the slide rail sleeve of the present invention after it is unfolded;

[0047] Figure 15 It is a structural schematic diagram of the indexing fork of the present invention;

[0048] Figure 16 It is a schematic diagram of the connection between the indexing fork and the rotating disk of the present invention;

[0049] Figure 17 It is a structural schematic diagram of the multi-directional displacement compensation mechanism of the present invention;

[0050] Figure 18 Schematic diagram of the internal structure of the multi-directional displacement compensation mechanism of the present invention;

[0051] Figures 19 to 24 The figure is a schematic diagram of the lifting process of the large crucible tower lifting device with automatic grasping and unlocking of the present invention.

[0052] In the figure: 10-lifting assembly; 11-lifting ring; 12-lifting plate; 20-anti-slip hook assembly; 30-chain; 40-lifting hook; 41-limiting part; 42-lifting part; 43-anti-slip part; 44-grabbing part; 50-axial intermittent limiting mechanism; 51-stabilizing plate; 52-rotating plate; 53-grooving; 54-perforation; 55-guide sleeve; 56-slide rod; 57-mounting ear; 58-guide sleeve pin; 60-fixing rod; 70-fork type fixed angle rotation mechanism; 71-slide rail sleeve; 72-pull rod; 73-indexing fork; 74-shift rod; 75-shift rod pin; 76-dust cover; 80-multi-directional displacement compensation Mechanism; 81-upper pull rod; 82-displacement compensation sleeve; 83-lower pull rod; 84-boss; 85-limiting ring; 86-lower pull rod pin; 90-anti-slip tower ring; 100-crucible; 411-limiting hole; 421-lifting hole; 431-anti-slip hole; 441-grab hook; 511-stabilizing disk ear; 512-stabilizing disk ear pin; 513-limiting roller; 521-rotating block; 522-connecting block; 711-linear guide rail; 712-inclined guide rail; 713-limiting groove; 714-guide inclined plane; 731-shift fork groove; 732-shift fork block; 733-outer ring protrusion; 734-inner ring groove; 741-shift block. DETAILED DESCRIPTION

[0053] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0054] Please refer to Figure 2This embodiment provides a large crucible tower lifting device that automatically grabs and unlocks, including: a lifting assembly 10, an anti-slip hook group 20, and a fork-type fixed-angle rotating mechanism 70. The lifting assembly 10 includes a lifting ring 11 and a lifting plate 12 connected to the bottom of the lifting ring 11. The lifting ring 11 is used to connect with an external lifting device, such as a traveling crane, etc. The anti-slip hook group 20 and the fork-type fixed-angle rotating mechanism 70 are distributed and suspended at the bottom of the lifting plate 12 and the lifting ring 11. At the same time, the anti-slip hook group 20 is connected to the fork-type fixed-angle rotating mechanism 70. Under the combined action of gravity and upward pulling force, the lifting device of the present invention can automatically grab and unlock large crucibles. The operator does not need to hang the hook on the crucible at close range, which avoids the risk of scalding and increases the lifting safety of large crucibles. In addition, the entire lifting process is simple and easy to operate.

[0055] Please refer to Figure 3 The anti-slip hook group 20 includes three hooks 40, an anti-slip ring 90, and an axial discontinuous limiting mechanism 50. The anti-slip ring 90 is horizontally arranged, and all hooks 40 are evenly spaced and hinged on the anti-slip ring 90. The anti-slip ring 90 has a positioning and limiting effect on all hooks 40. Therefore, when the crucible 100 is hoisted, it has an anti-slip effect (the hook 40 will not slide outward). At the same time, when the anti-slip ring 90 is placed on the mouth of the crucible 100, the position where it is hinged to the hook 40 serves as a fulcrum, and the hook 40 rotates on this fulcrum. A chain 30 is connected to the hook 40, and the chain 30 is connected to the hanging plate 12. The axial discontinuity limiting mechanism 50 is located above the anti-slip ring 90 and is fixedly connected to the anti-slip ring 90 via a fixing rod 60. Specifically, the ends of the fixing rod 60 are respectively connected to the anti-slip ring 90 and the axial discontinuity limiting mechanism 50. The fixed connection methods include but are not limited to threaded connection, bolt connection, welding, and riveting. The axial discontinuity limiting mechanism 50 is also hinged to the hook 40.

[0056] Please refer to Figure 4 and Figure 5 The hook 40 is hook-shaped and includes a stopper 41, a hoisting portion 42, an anti-slip portion 43, and a gripping portion 44, which are sequentially connected from top to bottom. The stopper 41, hoisting portion 42, anti-slip portion 43, and gripping portion 44 are integrally formed. The stopper 41 has a stopper hole 411 for articulating with the axial intermittent stopper 50. The hoisting portion 42 has a hoisting hole 421 for articulating with the chain 30. The anti-slip portion 43 has an anti-slip hole 431 for articulating with the anti-slip tower ring 90. The gripping portion 44 has a hook 441 for hooking the mouth of the crucible 100.

[0057] In this embodiment, the limiting portion 41 is located above the anti-slip ring 90, the outer side of the anti-slip ring 90 is hinged to the anti-slip portion 43, and the grab hook 441 is located at the bottom of the anti-slip ring 90, that is, the hook-shaped hook 40 semi-surrounds the anti-slip ring 90 from the outer side of the anti-slip ring 90.

[0058] In this embodiment, the limiting holes 411 , the hoisting holes 421 and the anti-drop holes 431 are alternately arranged in the horizontal direction.

[0059] Please refer to Figures 6 to 9 The axial intermittent limit mechanism 50 includes a stabilizing disc 51, a rotating disc 52, and three sets of sliding assemblies. The rotating disc 52 is located on top of the stabilizing disc 51 and rotates in conjunction with the stabilizing disc 51. The three sets of sliding assemblies are evenly spaced around the stabilizing disc 51 and pass through the rotating disc 52. The rotating disc 52 rotates to alternately limit and release the sliding assemblies axially upward. Compared to existing direct electric control methods, this has a simpler structure, is easier to maintain, has lower costs, and has a longer lifespan in high-temperature environments.

[0060] The stabilizing plate 51 has a mounting hole in its center. Three slots 53 are evenly spaced along its edge. Each slot 53 is flanked by mounting ears 57. In this embodiment, the mounting ears 57 are located at the bottom of the stabilizing plate 51 and are integrally formed with the plate. A plurality of upwardly extending stabilizing ears 511 are welded to the edge of the stabilizing plate 51. These ears 511 are connected to limiting rollers 513 via stabilizing ear pins 512. The limiting rollers 513 are rotatably connected to the stabilizing ear pins 512, and their rolling surfaces contact the top surface of the rotating plate 52, limiting rotation of the rotating plate 52 along its central axis.

[0061] A rotating block 521 is provided at the bottom of the rotating disk 52. The rotating block 521 passes through the mounting hole of the stabilizing disk 51. The rotating disk 52 is restrained by the rotating block 521, the stabilizing disk ears 511, and the limiting roller 513, so that the rotating disk 52 can only rotate along its own central axis. The outer wall of the rotating block 521 is also provided with a connecting block 522 that slidably cooperates with the shift fork-type fixed-angle rotation mechanism 70. The rotating disk 52 is provided with three through-holes 54, which correspond one-to-one with the through-slots 53 and the sliding assembly, allowing the sliding assembly to pass through the through-holes 54 and through-slots 53.

[0062] In order to allow the sliding assembly to smoothly pass through the through hole 54 , in this embodiment, the through hole 54 is a fan-shaped hole, and the boundaries on both sides of the through groove 53 are projected into the fan-shaped hole.

[0063] The sliding assembly corresponds to the hook 40 and includes a guide sleeve 55 and a slide rod 56. The guide sleeve 55 is pivotally connected to the corresponding mounting lug 57 via a guide sleeve pin 58, allowing the entire sliding assembly to be positioned not only vertically but also at a certain angle relative to the vertical. The top of the slide rod 56 penetrates the guide sleeve 55 and slides with it. Simultaneously, the slide rod 56 passes through the through hole 54. At this point, the slide rod 56 is in an unrestricted state, and its bottom is hingedly connected to the corresponding retaining portion 41.

[0064] Since the slide rod 56 is hinged to the limit portion 41 and the guide sleeve 55 is hinged to the mounting ear 57 , when the hook 40 rotates around the anti-drop hole 431 , the guide sleeve 55 and the slide rod 56 can rotate accordingly, ensuring that the slide rod 56 can slide in the guide sleeve 55 .

[0065] In other embodiments of the present invention, the number of sliding components, slots 53, holes 54 and hooks 40 can also be 1, 2, 4, 5, etc., ensuring that the sliding components, slots 53, holes 54 and hooks 40 correspond one to one.

[0066] Please refer to Figures 10 to 16 The fork-type fixed-angle rotation mechanism 70 includes: a slide rail sleeve 71, a pull rod 72, an indexing fork 73 and a shift rod 74. The slide rail sleeve 71, the indexing fork 73, the shift rod 74 and the pull rod 72 are sequentially sleeved from the outside to the inside, and the adjacent components are slidably matched from the outside to the inside.

[0067] The guide rail sleeve 71 is a hollow cylinder comprising two sets of guide rails, which are evenly spaced along the circumference of the guide rail sleeve 71. The guiding effect of the two sets of guide rails is more stable. Obviously, in other embodiments of the present invention, the number of guide rails can also be 1, 3, 4, etc. The guide rails include a linear guide rail 711 and an inclined guide rail 712, which are arranged in sequence from the top. The top of the linear guide rail 711 extends to the top surface of the guide rail sleeve 71, that is, the top of the linear guide rail 711 is open, and the bottom of the linear guide rail 711 is connected to the top of the inclined guide rail 712, and the bottom of the inclined guide rail 712 is sealed. The side walls on the left and right sides of the inclined guide rail 712 extend in the axial direction, and the right side wall of the inclined guide rail 712 extends in the same direction as the right side wall of the linear guide rail 711. The top and bottom walls of the inclined guide rail 712 form an angle with the axial direction of the guide rail sleeve 71, causing the inclined guide rail 712 to tilt downward to the left. The length of the inclined guide rail 712 in both the lateral and axial directions of the slide rail sleeve 71 is greater than the width of the linear guide rail 711, allowing the lever pin 75 to slide sequentially on the right side wall, bottom wall, left side wall, and top wall of the inclined guide rail 712. Obviously, in other embodiments of the present invention, the left side wall of the inclined guide rail 712 and the left side wall of the linear guide rail 711 may extend in the same direction, in which case the inclined guide rail 712 is inclined downward and to the right.

[0068] A plurality of limiting grooves 713 are evenly spaced at the top of the slide rail sleeve 71, and a guide slope 714 is provided on both sides of the limiting groove 713. The slope of the guide slope 714 is 30° to 60°. In this embodiment, the slope of the guide slope 714 is 45°, and the bottom width of the limiting groove 713 is greater than the width of the linear guide rail 711.

[0069] The indexing fork 73 extends from the top of the slide rail sleeve 71 and slides with the slide rail sleeve 71. The indexing fork 73 is provided with fork grooves 731 at its bottom end, the number and distribution of which are consistent with the limit groove 713, forming a plurality of fork blocks 732, that is, a fork groove 731 is formed between two adjacent fork blocks 732. The top inner side of the indexing fork 73 is provided with an inner ring groove 734, and the top outer side of the indexing fork 73 is provided with an outer ring protrusion 733. The outer ring protrusion 733 extends into the limit groove 713, and ensures that the bottom width of the limit groove 713 is greater than the width of the outer ring protrusion 733 and the width of the linear guide 711, so as to prevent the outer ring protrusion 733 from entering the linear guide 711. When the outer ring protrusion 733 rotates, under the guidance of the guide inclined surface 714, the indexing fork 73 rotates and slides in the slide rail sleeve 71 until the outer ring protrusion 733 disengages from the limiting groove 713. As the rotation continues, the outer ring protrusion 733 enters the next limiting groove 713, realizing a fixed angle rotation of the indexing fork 73. The angle of each rotation is:

[0070]

[0071] In this embodiment, the number of outer ring protrusions 733 is 2, and they are arranged at the top of the indexing fork 73. In other embodiments of the present invention, the number of outer ring protrusions 733 can also be 1, 3, 4, 5, etc., as long as all the outer ring protrusions 733 can cooperate with the limiting groove 713.

[0072] The shift lever 74 is located inside the guide rail sleeve 71. The bottom end of the shift lever 74 is symmetrically equipped with shift lever pins 75, whose number and distribution pattern match the guide rail. All shift lever pins 75 extend into and slide within their corresponding linear guide rails 711. To ensure smooth sliding of the shift lever pins 75, the width of the linear guide rail 711 is greater than the diameter of the shift lever pins 75. The top of the shift lever 74 is equipped with a shift block 741 with a curved outer surface. The shift block 741 extends into and slides within the shift fork groove 731. To prevent interference between the shift block 741 and the guide rail sleeve 71, the outer diameter of the shift block 741 matches the outer diameter of the indexing fork 73.

[0073] In this embodiment, the end surface of the shifting rod pin 75 is lower than or equal to the outer surface of the slide rail sleeve 71 to avoid interference between the shifting rod pin 75 and other external structures; the outer diameter of the shifting block 741 can also be smaller than the outer diameter of the indexing fork 73.

[0074] In this embodiment, the number of the shift blocks 741 is 2, and they are arranged at the top of the shift rod 74. In other embodiments of the present invention, the number of the shift blocks 741 can also be 1, 3, 4, 5, etc., as long as all the shift blocks 741 can cooperate with the shift fork groove 731.

[0075] When the shift rod 74 moves downward, the shift block 741 separates from the shift fork groove 731 and, under the guidance of the inclined guide rail 712, can enter the next shift fork groove 731 and drive the indexing fork 73 to rotate, so that the outer ring protrusion 733 enters the next limit groove 713, completing the fixed angle rotation of the indexing fork 73.

[0076] The bottom end of the pull rod 72 extends from the top of the shift lever 74 and is connected to the shift lever 74 via the shift lever pin 75. Specifically, the shift lever pin 75 is fixedly connected to the pull rod 72 (e.g., by welding), and the shift lever pin 75 passes through the small hole in the shift lever 74 and enters the linear guide rail 711. The connecting block 522 on the rotating block 521 extends into the inner ring groove 734 of the indexing fork 73 and can slide within the inner ring groove 734. This ensures that the axial movement of the indexing fork 73 does not cause the rotating disk 52 to move axially, while the rotation of the indexing fork 73 causes the rotating disk 52 to rotate. The top end of the pull rod 72 passes through the rotating block 521 and the rotating disk 52 in turn, and is connected to the lifting ring 11 through the multi-directional displacement compensation mechanism 80.

[0077] The outer side of the slide rail sleeve 71 is provided with a dustproof sleeve 76, the inner diameter of the dustproof sleeve 76 is larger than the outer diameter of the slide rail sleeve 71, the bottom end of the slide rail sleeve 71 is connected to the dustproof sleeve 76 by welding, and the top end of the dustproof sleeve 76 is fixedly connected to the bottom of the stabilizing plate 51 by welding, so the slide rail sleeve 71 is fixedly connected to the stabilizing plate 51 through the dustproof sleeve 76.

[0078] Please refer to Figure 17 and Figure 18 The multi-directional displacement compensation mechanism 80 includes: an upper pull rod 81 connected to the lifting ring 11, a displacement compensation sleeve 82 and a lower pull rod 83 connected to the pull rod 72. The upper pull rod 81 extends from one end of the displacement compensation sleeve 82, and the lower pull rod 83 extends from the other end of the displacement compensation sleeve 82.

[0079] The end of the upper rod 81 that extends into the displacement compensation sleeve 82 is provided with a boss 84. The boss 84 slides with the inner wall of the displacement compensation sleeve 82 and can rotate within the displacement compensation sleeve 82. The inner wall of the displacement compensation sleeve 82 at the end corresponding to the upper rod 81 is provided with a limit ring 85, which restricts the boss 84 within the displacement compensation sleeve 82. Since the upper rod 81 can slide and rotate within the displacement compensation sleeve 82, it has axial displacement compensation and circumferential angle compensation functions.

[0080] After extending into the displacement compensation sleeve 82, the lower tie rod 83 is connected to the displacement compensation sleeve 82 via the lower tie rod pin 86. Specifically, the lower tie rod 83 and the lower tie rod pin 86 are rotatably engaged. The outer diameter of the lower tie rod 83 is smaller than the inner diameter of the displacement compensation sleeve 82, that is, there is a gap between the lower tie rod 83 and the displacement compensation sleeve 82, allowing the lower tie rod 83 to slide on the lower tie rod pin 86, thereby providing radial displacement compensation.

[0081] In this embodiment, there is a gap between the boss 84 and the lower rod 83 , so that the upper rod 81 is restricted between the lower rod 83 and the limiting ring 85 , and the boss 84 can slide.

[0082] In order to have better connectivity, in this embodiment, the lower pull rod 83 and the pull rod 72 are integrally formed (ie, an integrated structure).

[0083] The multi-directional displacement compensation mechanism 80 of this embodiment has the functions of compensating for circumferential angle, vertical displacement, axial displacement and radial displacement, and is used to compensate for radial and axial displacements of the lower pull rod 83 .

[0084] Please refer to Figures 19 to 24 , the lifting process of the lifting device of the present invention:

[0085] (1) When the lifting device is in the initial position, the entire device is in a suspended state, and the slide rod 56 passes through the through hole 54. At this time, the slide rod 56 is not limited in its axial direction, and the hook 40 is in a working state.

[0086] (2) The entire lifting device is lowered, and the anti-drop tower ring 90 is placed on the auxiliary tool. At this time, the chain 30 is relaxed, and the slide rod 56 moves downward under the action of gravity and enters the guide sleeve 55. The hook 40 rotates to the tilted position under the action of gravity, so that the hook 40 enters the unlocked state. At the same time, the pull rod 72 moves downward under the action of gravity, driving the shift rod 74 and the shift rod pin 75 to move downward. The shift rod pin 75 moves along the linear guide rail 711 and the inclined guide rail 712 until it contacts the bottom wall of the inclined guide rail 712. The shift block 741 gradually slides out of the shift fork groove 731. The shift rod pin 75 slides along the bottom wall of the inclined guide rail 712 to the lowest point of the inclined guide rail 712. The shift rod 74 and the pull rod 72 rotate accordingly. At this time, the shift block 741 corresponds to the next shift fork groove 731.

[0087] (3) The entire device is pulled up, and the pull rod 72 and the shift rod 74 move upward under the action of the pulling force, driving the shift rod pin 75 to move upward along the left side wall of the inclined guide rail 712. During the upward movement, the shift block 741 enters the next shift fork groove 731. As the entire device continues to be pulled up, the shift rod pin 75 enters the linear guide rail 711 along the top wall of the inclined guide rail 712, and the pull rod 72 and the shift rod 74 rotate accordingly. The indexing fork 73 rotates under the action of the shift block 741. Under the guidance of the guide inclined surface 714, the outer ring protrusion 733 is brought into the next limit groove 713, realizing the fixed angle rotation of the indexing fork 73, thereby driving the rotating disk 52 connected to the indexing fork 73 to rotate at a fixed angle. After the rotating disk 52 rotates, it will block the through groove 53 (that is, the through groove 53 does not correspond to the through hole 54). At the same time, the chain 30 is gradually tightened under the action of tension, causing the anti-slip tower ring 90 to leave the auxiliary tool, driving the hook 40 to rotate, and the slide bar 56 then slides in the guide sleeve 55. Since the rotating disk 52 blocks the through groove 53, the rotating disk 52 will prevent the slide bar 56 from continuing to move upward. At this time, the axial upward displacement of the slide bar 56 is restricted. At this time, although the hook 40 has rotated a certain angle, it is still in a tilted state, that is, in an unlocked state.

[0088] (4) The entire lifting device is lowered, and the anti-slip ring 90 is placed at the mouth of the crucible 100. Before placement, the position of the anti-slip ring 90 can be adjusted by the auxiliary hook so that the anti-slip ring 90 corresponds to the mouth of the crucible 100. At this time, the chain 30 is relaxed, the slide bar 56 slides in the guide sleeve 55 under the action of gravity, and the hook 40 rotates under the action of gravity and remains unlocked. At the same time, the pull rod 72 moves downward under the action of gravity, driving the shift rod 74 and the shift rod pin 75 to move downward. The shift rod pin 75 moves along the linear guide rail 711 and the inclined guide rail 712 until it contacts the bottom wall of the inclined guide rail 712. The shift block 741 gradually slides out of the shift fork groove 731. The shift rod pin 75 slides along the bottom wall of the inclined guide rail 712 to the lowest point of the inclined guide rail 712. The shift rod 74 and the pull rod 72 rotate accordingly. At this time, the shift block 741 corresponds to the next shift fork groove 731.

[0089] (5) The entire device is pulled up, and the pull rod 72 and the shift rod 74 move upward under the action of the pulling force, driving the shift rod pin 75 to move upward along the left side wall of the inclined guide rail 712. During the upward movement, the shift block 741 enters the next shift fork groove 731. As the entire device continues to be pulled up, the shift rod pin 75 enters the linear guide rail 711 along the top wall of the inclined guide rail 712, and the pull rod 72 and the shift rod 74 rotate accordingly. The indexing fork 73 rotates under the action of the shift block 741. Under the guidance of the guide inclined surface 714, the outer ring protrusion 733 is brought into the next limit groove 713, realizing the fixed angle rotation of the indexing fork 73, thereby driving the rotating disk 52 connected to the indexing fork 73 to rotate at a fixed angle. After the rotating disk 52 rotates, the through groove 53 corresponds to the through hole 54. At the same time, the chain 30 gradually tightens under the action of the tension, driving the hook 40 to rotate. The slide bar 56 then slides within the guide sleeve 55 and passes through the through hole 54. As a result, the hook 40 can rotate to the working state, that is, the grab hook 441 contacts the bottom wall of the mouth of the crucible 100. At this time, the grab hook 441 is opposite to the anti-drop ring 90, and together they clamp the mouth of the crucible 100. As the entire device continues to pull upward, the lifting device lifts the crucible 100.

[0090] (6) After the crucible 100 is lifted to the designated position, the unlocking process of the hook is the same as steps (2) and (3). It is only necessary to place the crucible 100 to the designated position and then lift the lifting device upward.

[0091] The lifting device of this embodiment can grab and unlock the crucible 100 only by lowering and pulling up, which is simple to operate, saves time and effort, and the operator does not need to install the hook at close range, avoiding the risk of burns. Moreover, the entire device is a purely mechanical structure, which is less affected by high temperature than the electric control method and has a longer service life in a high temperature environment.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A large crucible tower lifting device with automatic grasping and unlocking, characterized in that: include: Lifting components (10 ） , an anti-slip hook assembly (20), and a fork-type fixed-angle rotation mechanism (70); The anti-slip hook assembly (20) comprises: a plurality of hooks (40), an anti-slip tower ring (90), and an axial discontinuity limiting mechanism (50); The anti-slip ring (90) is arranged horizontally, all the hooks (40) are evenly spaced and arranged on the anti-slip ring (90), the hooks (40) are connected to the hoisting assembly (10) through a chain (30), the axial discontinuity limiting mechanism (50) is located above the anti-slip ring (90), the axial discontinuity limiting mechanism (50) is connected to the anti-slip ring (90) through a fixing rod (60), and the axial discontinuity limiting mechanism (50) is connected to all the hooks (40); The fork-type fixed-angle rotation mechanism (70) is respectively connected to the hoisting assembly (10) and the axial discontinuity limiting mechanism (50); The lifting and lowering of the hoisting assembly (10) drives the hook (40) to automatically grab and unlock; The hook (40) comprises a limiting portion (41), a hoisting portion (42), an anti-slip portion (43) and a grabbing portion (44) connected in sequence; the limiting portion (41) is provided with a limiting hole (411), the hoisting portion (42) is provided with a hoisting hole (421), the anti-slip portion (43) is provided with an anti-slip hole (431), and the grabbing portion (44) is provided with a grabbing hook (441); the axial intermittent limiting mechanism (50) is provided at the limiting hole (411). The chain (30) is hinged to the limiting portion (41), the chain (30) is hinged to the hoisting portion (42) at the hoisting hole (421), the anti-slip ring (90) is hinged to the anti-slip portion (43) at the anti-slip hole (431), and the grab hook (441) and the anti-slip ring (90) are spaced apart in the vertical direction; when the anti-slip hole (431) is used as a rotation fulcrum, the limiting portion (41) and the hoisting portion (42) rotate downward; The axial discontinuity limiting mechanism (50) comprises a stabilizing disk (51), a rotating disk (52), and multiple sets of sliding components; The bottom of the stabilizing plate (51) is connected to the anti-slip tower ring (90) via the fixing rod (60); The rotating disk (52) is located on top of the stabilizing disk (51) and is rotatably coupled to the stabilizing disk (51); the stabilizing disk (51) and the rotating disk (52) are respectively provided with through grooves (53) and through holes (54) of the same number as the sliding assembly; The number of the sliding components is consistent with the number of the hooks (40) and corresponds one to one. The sliding components include a guide sleeve (55) and a slide rod (56); the guide sleeve (55) extends into the through groove (53) and is hinged to the stabilizing plate (51); the top of the slide rod (56) slides with the guide sleeve (55) and passes through the through hole (54); the bottom of the slide rod (56) is hinged to the limiting portion (41) at the limiting hole (411); The shift fork type fixed angle rotation mechanism (70) comprises: a slide rail sleeve (71), a pull rod (72), an indexing shift fork (73) and a shift rod (74); The slide rail sleeve (71) is provided with a linear guide rail (711) and an inclined guide rail (712) in sequence from the top thereof, the top end of the inclined guide rail (712) is connected to the bottom end of the linear guide rail (711), and the axial length of the inclined guide rail (712) is greater than the width of the linear guide rail (711); the top of the slide rail sleeve (71) is also provided with a plurality of limiting grooves (713) at even intervals; The indexing fork (73) is sleeved on the pull rod (72) and slides into the slide rail sleeve (71). The indexing fork (73) is provided with fork grooves (731) whose number and distribution are consistent with the limit grooves (713) from its bottom end to form a plurality of fork blocks (732). The outer side of the top of the indexing fork (73) is provided with an outer ring protrusion (733) that matches the limit grooves (713). The shift rod (74) is sleeved on the bottom end of the pull rod (72) and connected to the pull rod (72) through a shift rod pin (75); the shift rod pin (75) is in sliding engagement with the linear guide rail (711); the top end of the shift rod (74) extends into the interior of the indexing fork (73) and is provided with a shift block (741) in sliding engagement with the fork groove (731); The outer side of the slide rail sleeve (71) is connected to a dust cover (76), and the dust cover (76) is fixedly connected to the bottom of the stabilizing disk (51); the indexing fork (73) is slidably matched with the rotating disk (52) to drive the rotating disk (52) to rotate, and the pull rod (72) passes through the stabilizing disk (51) and the rotating disk (52).

2. The large crucible tower lifting device with automatic grasping and unlocking according to claim 1 is characterized in that: Both sides of all the through slots (53) are provided with mounting ears (57), and the mounting ears (57) are arranged on the bottom side of the stabilizing plate (51). The mounting ears (57) of the same through slot (53) are rotatably connected to the guide sleeve (55) through a guide sleeve pin (58).

3. The large crucible tower lifting device with automatic grasping and unlocking according to claim 2 is characterized in that: A plurality of stabilizing disc ears (511) are provided on the outer side of the stabilizing disc (51), and the stabilizing disc ears (511) are connected to a limiting roller (513) via a stabilizing disc ear pin (512). The limiting roller (513) contacts the rotating disc (52) and is used to limit the rotation of the rotating disc (52) along its central axis.

4. The large crucible tower lifting device with automatic grasping and unlocking according to claim 1 is characterized in that: Guide slopes (714) are respectively provided on both sides of the limiting groove (713), and the inclination angle of the guide slopes (714) is 30° to 60°; the bottom width of the limiting groove (713) is greater than the width of the outer ring protrusion (733) > the width of the linear guide rail (711) > the diameter of the shifting rod pin (75); a rotating block (521) is provided at the bottom center of the rotating disk (52), the rotating block (521) passes through the stabilizing disk (51), a connecting block (522) is provided on the outer side of the rotating block (521), and an inner ring groove (734) is provided on the inner side of the top of the indexing fork (73) for sliding engagement with the connecting block (522).

5. The large crucible tower lifting device with automatic grasping and unlocking according to claim 1 is characterized in that: The hoisting assembly (10) is connected to the top of the pull rod (72) via a multi-directional displacement compensation mechanism (80); The multi-directional displacement compensation mechanism (80) includes: an upper pull rod (81) connected to the hoisting assembly (10), a displacement compensation sleeve (82) and a lower pull rod (83) connected to the top of the pull rod (72); the upper pull rod (81) extends from one end of the displacement compensation sleeve (82) and slides and rotates with the displacement compensation sleeve (82), and the lower pull rod (83) extends from the other end of the displacement compensation sleeve (82) and is connected to the displacement compensation sleeve (82) through a lower pull rod pin (86); the outer diameter of the lower pull rod (83) is smaller than the inner diameter of the displacement compensation sleeve (82), and the lower pull rod (83) slides with the lower pull rod pin (86).

6. The large crucible tower lifting device with automatic grabbing and unlocking according to claim 5, characterized in that: The lower pull rod (83) and the pull rod (72) are integrally formed.

7. The large crucible tower lifting device with automatic grasping and unlocking according to any one of claims 1 to 6, characterized in that: The hoisting assembly (10) comprises a hoisting ring (11) and a hoisting plate (12) connected to the bottom of the hoisting ring (11); the hoisting ring (11) is also connected to the fork-type fixed-angle rotation mechanism (70), and the hoisting plate (12) is connected to the chain (30).

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