Fine adjustment centering device for ladle filler sand guide pipe and filler sand filling device

Abstract

The invention relates to a fine adjustment centering device for a ladle filler sand guide pipe. The fine adjustment centering device comprises a mounting platform, a fixed plate, a movable frame, a first translation assembly, a second translation assembly and two guide rails. The two guide rails are arranged on the upper side of the installation platform in parallel. The movable frame is horizontally arranged on the upper sides of the two guide rails in a sliding mode and can slide in the length direction of the two guide rails. The fixing plate is vertically arranged on the upper side of the mounting platform. The guide rail is perpendicular to the plane where the fixing plate is located. The first translation assembly comprises a first adjusting screw rod, an adjusting nut and a first positioning pin and is used for adjusting the position of the drainage sand guide pipe in the first direction; the second translation assembly comprises a supporting rod, a fixed semi-ring, a movable semi-ring, a sleeve, a locking piece and a second adjusting screw rod and is used for adjusting the position of the drainage sand guide pipe in the second direction. The first direction and the second direction are both horizontal and perpendicular to each other. According to the invention, the stuffing sand guide pipe can be conveniently and accurately centered with the collector nozzle channel at the bottom of the steel ladle, and the stuffing sand filling quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ladle drainage sand conduit adjustment, and particularly to a fine adjustment and centering device for a ladle drainage sand conduit and a drainage sand filling device. Background Technique

[0002] During the smelting of special steel, the ladle refining process is adopted for the purification treatment of molten steel. Before the ladle is filled with molten steel, drainage sand must be filled in the ladle nozzle. After the molten steel refining is completed, the slide plate of the ladle nozzle is opened, and all the drainage sand flows out from the ladle nozzle and is drained. The molten steel naturally flows out from the bottom nozzle of the ladle and is continuously cast into steel billets or die-cast into ingots. After pouring the molten steel, the ladle is replaced with a new nozzle and filled with drainage sand again for molten steel refining. In this way, the ladle can be reused multiple times, improving efficiency and reducing costs. The quality of drainage sand filling is a very important link to ensure the quality of molten steel.

[0003] In the prior art, a steel pipe with the same diameter up and down is used as the drainage sand conduit to fill the drainage sand into the ladle nozzle. The lower end of the drainage sand conduit is not easy to be centered with the lower nozzle channel at the bottom of the ladle, resulting in the drainage sand flowing downwards being easily accumulated on the surface of the ladle bottom, and entering the molten steel during the pouring process to form foreign inclusions, contaminating the molten steel. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a fine adjustment and centering device for a ladle drainage sand conduit.

[0005] The fine adjustment and centering device for a ladle drainage sand conduit provided by the present invention adopts the following technical solutions:

[0006] A fine-tuning centering device for a tundish drainage sand conduit, comprising an installation platform, a fixed plate, a movable frame, a first translation assembly, a second translation assembly and two guide rails; wherein, the installation platform is horizontally and fixedly arranged directly above the tundish, and is provided with a guide hole for the drainage sand conduit to pass through; the two guide rails are arranged parallel to each other on the upper side of the installation platform, and the guide hole is located between the two; the movable frame is horizontally slidably arranged on the upper sides of the two guide rails and can slide along the length directions of the two guide rails; the fixed plate is vertically arranged on the upper side of the installation platform; the guide rails are perpendicular to the plane where the fixed plate is located; the first translation assembly includes a first adjusting screw, an adjusting nut and a first positioning pin; the first adjusting screw sequentially passes through the fixed plate and the movable frame along the direction parallel to the length direction of the guide rail and is threadedly connected to the fixed plate; the adjusting nut is threadedly connected to one end of the first adjusting screw protruding from the movable frame; the first positioning pin passes through the first adjusting screw to limit the relative movement between the first adjusting screw and the movable frame; the second translation assembly includes a support rod, a fixed half-ring, a movable half-ring, a sleeve, a locking member and a second adjusting screw; the second adjusting screw penetrates into the movable frame from the outside in the direction perpendicular to the length direction of the guide rail and is in threaded cooperation with the movable frame; the sleeve is coaxially sleeved on the end of the second adjusting screw protruding from the movable frame; the second adjusting screw and the sleeve can be locked by the locking member; the fixed half-ring is fixedly connected to the support rod; the movable half-ring is detachably arranged on the support rod; the fixed half-ring and the movable half-ring are butted against each other to form an installation space between the two for vertically surrounding the drainage sand conduit therein.

[0007] Optionally, the movable half-ring includes a ring body, a first ear plate and a second ear plate; the shape of the ring body is half of a circular ring; the first ear plate and the second ear plate are respectively fixedly connected to both ends of the ring body; the first ear plate is connected to the support rod through a movable bolt, so that the movable half-ring forms a hinge joint with the support rod through the movable bolt, and the axis of the movable bolt is the hinge axis; the second ear plate is connected to the support rod through a second positioning pin.

[0008] Optionally, the second translation assembly further includes a guide tube; one end of the guide tube is fixedly connected to the inner wall of the movable frame and is coaxial with the support rod; one end of the support rod penetrating into the movable frame is inserted into the guide tube and can slide along its own axis or rotate around its own axis in the guide tube.

[0009] Based on the above concept, the present invention further provides a device for filling drainage sand, which includes the above-mentioned fine-tuning and centering device for the ladle drainage sand conduit, and further includes a cross beam, a lifting device, a suspension cable and a drainage sand conduit; wherein, the cross beam is fixedly installed above the ladle; the lifting device is arranged on the cross beam and is connected to the upper end of the drainage sand conduit through the suspension cable, and can drive the drainage sand conduit to lift and lower; the fine-tuning and centering device for the ladle drainage sand conduit is located between the lifting device and the ladle; the drainage sand conduit is lowered to the upper water inlet of the ladle after passing through the fine-tuning and centering device for the ladle drainage sand conduit.

[0010] Optionally, the drainage sand conduit includes a pipe body and a funnel arranged at the upper end of the pipe body; the funnel is conical, and its smaller-diameter opening is communicated with the upper end of the pipe body; the volume of the funnel is greater than the total volume of the drainage sand required by the ladle.

[0011] Optionally, the drainage sand conduit further includes a safety ring; the safety ring is sleeved on the outer wall of the pipe body; the safety ring is located between the lower end of the pipe body and the second translation assembly; the diameter of the safety ring is greater than the diameter of the installation space to limit the ascending stroke of the drainage sand conduit.

[0012] Optionally, the drainage sand conduit further includes a flow guide cover; the flow guide cover is conical; the flow guide cover is communicated with the lower-end opening of the pipe body, and its larger-diameter opening faces the upper water inlet of the ladle for concentrating the drainage sand discharged from the lower end of the pipe body.

[0013] Optionally, the flow guide cover is sleeved on the outer wall of the pipe body through its smaller-diameter opening and can slide on the pipe body along the axial direction of the pipe body; a limiting member for limiting the sliding of the flow guide cover is arranged on the pipe body.

[0014] Optionally, the limiting member includes a limiting ring; the limiting ring is fixedly sleeved on the lower end of the pipe body, and its outer diameter is greater than the diameter of the smaller-diameter opening of the flow guide cover, so that the flow guide cover cannot slip off from the lower end of the pipe body.

[0015] Optionally, the lifting device includes an electric hoist; the electric hoist is arranged on the lower side of the cross beam and is used for winding and unwinding the suspension cable.

[0016] As described above, the fine-tuning and centering device for the ladle drainage sand conduit of the present invention has at least the following beneficial effects:

[0017] The fine-tuning and centering device for the tundish drainage sand conduit of the present invention adjusts the position of the drainage sand conduit in the first direction through the first adjusting screw rod, and adjusts the position of the drainage sand conduit in the second direction through the second adjusting screw rod. Since both the first direction and the second direction are horizontal and perpendicular to each other, the position of the axis of the drainage sand conduit can be accurately adjusted, so that the drainage sand conduit can be conveniently and accurately centered with the water outlet channel at the bottom of the tundish, improving the quality of the drainage sand filling. Brief Description of the Drawings

[0018] Figure 1 It is a schematic diagram showing the structure of the fine-tuning and centering device for the tundish drainage sand conduit in an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram showing the structure of the fine-tuning and centering device for the tundish drainage sand conduit in an embodiment of the present invention.

[0020] Reference Numerals: 001, fine-tuning and centering device for the tundish drainage sand conduit; 1, installation platform; 2, fixed plate; 3, movable frame; 4, guide rail; 5, guide hole; 6, first adjusting screw rod; 7, adjusting nut; 8, first positioning pin; 9, support rod; 10, fixed half-ring; 11, movable half-ring; 111, ring body; 112, first ear plate; 1121, movable bolt; 113, second ear plate; 1131, second positioning pin; 12, sleeve; 13, locking member; 14, second adjusting screw rod; 15, guide tube; 16, cross beam; 17, lifting device; 18, suspension cable; 19, drainage sand conduit; 191, tube body; 192, funnel; 193, flow guiding cover; 194, safety ring. Detailed Embodiments

[0021] The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. It should also be understood that the terms used in the embodiments of the present invention are for the purpose of describing specific specific implementation manners, rather than for limiting the protection scope of the present invention. The test methods without specific conditions noted in the following embodiments are usually carried out under conventional conditions or according to the conditions recommended by each manufacturer.

[0022] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

[0023] Please refer to Figure 1 、 2 , the present invention first discloses a fine-tuning and centering device for a tundish drainage sand conduit, which includes an installation platform 1, a fixing plate 2, a movable frame 3, a first translation component, a second translation component, and two guide rails 4.

[0024] Specifically, the installation platform 1 is horizontally and fixedly arranged directly above the tundish, and a guiding hole 5 for the drainage sand conduit 19 to pass through is provided thereon. The installation platform 1 can be built by steel plates, and the staff can operate on its upper side.

[0025] The two guide rails 4 are arranged in parallel on the upper side of the installation platform 1, and the guiding hole 5 is located between them. The movable frame 3 is horizontally slidably arranged on the upper sides of the two guide rails 4 and can slide along the length direction of the two guide rails 4. The fixing plate 2 is vertically arranged on the upper side of the installation platform 1. The guide rails 4 are perpendicular to the plane where the fixing plate 2 is located. The sliding fit between the movable frame 3 and the guide rails 4 can be achieved in various ways. For example, chutes are provided on the guide rails 4 along the length direction of the guide rails 4, and two sliders are correspondingly arranged on the lower side of the movable frame 3 in one-to-one correspondence with the two chutes. The two sliders are respectively embedded in the corresponding chutes. The sliding fit between the movable frame 3 and the guide rails 4 can also be achieved through the cooperation of rollers and the guide rails 4. Preferably, in this embodiment, the movable frame 3 realizes sliding through the cooperation of the sliders and the chutes on the guide rails 4.

[0026] The first translation component includes a first adjusting screw 6, an adjusting nut 7, and a first positioning pin 8. The first adjusting screw 6 sequentially passes through the fixed plate 2 and the movable frame 3 in a direction parallel to the length direction of the guide rail 4, and is threadedly connected to the fixed plate 2. The adjusting nut 7 is threadedly connected to one end of the first adjusting screw 6 that passes through the movable frame 3. The first positioning pin 8 passes through the first adjusting screw 6 to limit the relative movement between the first adjusting screw 6 and the movable frame 3. After the first positioning pin 8 penetrates into the first adjusting screw 6, it is located in the gap between the opposite sides of the movable frame 3 and the fixed plate 2, so it will not interfere with the movable frame 3 or the fixed plate 2.

[0027] The working principle of the first translation component is as follows: Since the fixed plate 2 is fixedly arranged and the first adjusting screw 6 is in threaded cooperation with the fixed plate 2, when the first adjusting screw 6 is turned, the first adjusting screw 6 will move in a direction parallel to the length direction of the guide rail 4. When it is necessary to adjust the position of the movable frame 3 along the length direction of the guide rail 4, first loosen the adjusting nut 7, pull out the first positioning pin 8, turn the first adjusting screw 6, and adjust the position of the first adjusting screw 6. Then move the movable frame 3 to the preset position. Finally, insert the first positioning pin 8 into the first adjusting screw 6 and install the adjusting nut 7 back onto the first adjusting screw 6 to fix the position of the movable frame 3.

[0028] Please continue to refer to Figure 1 As shown in, the second translation component includes a support rod 9, a fixed half-ring 10, a movable half-ring 11, a sleeve 12, a locking member 13, and a second adjusting screw 14. The second adjusting screw 14 penetrates into the movable frame 3 from the outside inward in a direction perpendicular to the length direction of the guide rail 4 and is in threaded cooperation with the movable frame 3. The sleeve 12 is coaxially sleeved on the end of the second adjusting screw 14 that passes through the movable frame 3. The second adjusting screw 14 and the sleeve 12 can be locked by the locking member 13. The fixed half-ring 10 is fixedly connected to the support rod 9. The movable half-ring 11 is detachably arranged on the support rod 9. The fixed half-ring 10 and the movable half-ring 11 are butted against each other to form an installation space in which the drain sand conduit 19 can be vertically surrounded.

[0029] Taking the length direction of the guide rail 4 as the first direction and the horizontal direction perpendicular to the length direction of the guide rail 4 as the second direction, the working principle of the second translation component is as follows: Loosen the locking member 13 to make the sleeve 12 and the second adjusting screw 14 relatively slidable, then turn the second adjusting screw 14 to adjust the length of the second screw penetrating into the movable frame 3. Then adjust the position of the support rod 9 in the second direction by sliding the support rod 9 in the sleeve 12, thereby adjusting the position of the drain sand conduit 19 in the second direction. After the adjustment is in place, lock the sleeve 12 and the second adjusting screw 14 by the locking member 13.

[0030] Specifically, the movable semi-ring 11 includes a ring body 111, a first ear plate 112, and a second ear plate 113. The shape of the ring body 111 is half of a circular ring. The first ear plate 112 and the second ear plate 113 are respectively fixedly connected to both ends of the ring body 111. The first ear plate 112 is connected to the support rod 9 through a movable bolt 1121, so that the movable semi-ring 11 forms a hinge connection with the support rod 9 through the movable bolt 1121, and the axis of the movable bolt 1121 is the hinge axis. The second ear plate 113 is connected to the support rod 9 through a second positioning pin 1131. In a preferred embodiment of the present invention, the axes of both the movable bolt 1121 and the second positioning pin 1131 are vertical.

[0031] At the positions where the support rod 9 is connected to the first ear plate 112 and the second ear plate 113, a first receiving groove and a second receiving groove are respectively formed along the support rod 9. The depth of the first receiving groove is adapted to the thickness of the first ear plate 112. The depth of the second receiving groove is adapted to the thickness of the second ear plate 113. So that after the first ear plate 112 and the second ear plate 113 are connected to the support rod 9, they will not protrude from the upper surface of the support rod 9.

[0032] When installing the drainage sand conduit 19 for the first time, first place the drainage sand conduit 19 into the fixed semi-ring 10, then install the movable semi-ring 11 onto the support rod 9, and connect the first ear plate 112 to the support rod 9 through the movable bolt 1121, and connect the second ear plate 113 to the support rod 9 through the second positioning pin 1131, then the drainage sand conduit 19 can be fixed. When disassembling and assembling the drainage sand conduit 19 subsequently, only need to pull out the second positioning pin 1131, then use the movable bolt 1121 as a hinge axis, and the movable semi-ring 11 can be conveniently opened or closed to realize the quick disassembly and assembly of the drainage sand conduit 19.

[0033] After the support rod 9 penetrates into the movable frame 3, only through its threaded fit with the movable frame 3, the stability is insufficient. Therefore, in a preferred embodiment of the present invention, the second translation assembly further includes a guide tube 15. One end of the guide tube 15 is fixedly connected to the inner wall of the movable frame 3 and is coaxial with the support rod 9. The end of the support rod 9 that penetrates into the movable frame 3 is inserted into the guide tube 15 and can slide along its own axis or rotate around its own axis in the guide tube 15. The guide tube 15 can be a round tube or a square tube, and a square tube is adopted in this embodiment. After the end of the support rod 9 penetrates into the movable frame 3, it neither affects the rotation of the support rod 9 nor causes the axis of the support rod 9 to tilt.

[0034] The fine adjustment and centering device for the tundish drainage sand conduit of the present invention adjusts the position of the drainage sand conduit 19 in the first direction through the first adjusting screw 6, and adjusts the position of the drainage sand conduit 19 in the second direction through the second adjusting screw 14. Since both the first direction and the second direction are horizontal and perpendicular to each other, the position of the axis of the drainage sand conduit 19 can be accurately adjusted, so that the drainage sand conduit 19 can be conveniently and accurately centered with the water outlet channel at the bottom of the tundish, improving the quality of the drainage sand filling.

[0035] Secondly, please refer to Figure 2 , the present invention also discloses a drainage sand filling device, which includes the above-mentioned fine adjustment and centering device 001 for the tundish drainage sand conduit, and also includes a cross beam 16, a lifting device 17, a suspension cable 18 and a drainage sand conduit 19. The cross beam 16 is fixedly installed above the tundish. The lifting device 17 is arranged on the cross beam 16 and is connected to the upper end of the drainage sand conduit 19 through the suspension cable 18, and can drive the drainage sand conduit 19 to lift and lower. The fine adjustment and centering device 001 for the tundish drainage sand conduit is located between the lifting device 17 and the tundish. The drainage sand conduit 19 is lowered to the upper water inlet of the tundish through the fine adjustment and centering device 001 for the tundish drainage sand conduit.

[0036] Specifically, in this embodiment, the lifting device 17 adopts an electric hoist, and the electric hoist is arranged on the lower side of the cross beam 16 and is used for winding and unwinding the suspension cable 18. That is, one end of the suspension cable 18 is wound in the electric hoist, and the other end is connected to the upper end of the drainage sand conduit 19. The electric hoist has a simple structure, is easy to operate, safe and reliable, and is beneficial to improving the efficiency of the drainage sand filling. The lifting device 17 can also adopt other devices with winding and unwinding functions such as a crane and a winder.

[0037] The diameter of the drainage sand conduit 19 is small, and it is not easy for the drainage sand to enter it, and it is also easy to be scattered outside during drainage. In order to make the drainage sand easier to enter the drainage sand conduit 19, the drainage sand conduit 19 includes a pipe body 191 and a funnel 192 arranged at the upper end of the pipe body 191. The funnel 192 is conical, and its smaller diameter opening is communicated with the upper end of the pipe body 191. The volume of the funnel 192 is larger than the total volume of the drainage sand required for the tundish. The lower end of the suspension cable 18 can be connected to the funnel 192 through a hook.

[0038] When the drainage sand falls from the lower end of the drainage sand conduit 19, it needs to accurately fall within the range of the upper water inlet of the tundish. Therefore, the drainage sand conduit 19 also includes a flow guide cover 193. The flow guide cover 193 is conical. The flow guide cover 193 is communicated with the lower end opening of the pipe body 191, and its larger diameter opening faces the upper water inlet of the tundish, and is used for concentrating the drainage sand discharged from the lower end of the pipe body 191. When the flow guide cover 193 is working, it can partially enter the upper water inlet of the tundish, so that the drainage sand can directly enter the filling part, reducing the scattering of the drainage sand and reducing the waste of the drainage sand.

[0039] Further, the flow guide cover 193 is sleeved on the outer wall of the pipe body 191 through its smaller-diameter opening, and can slide on the pipe body 191 along the axial direction of the pipe body 191. A limiting member for restricting the sliding of the flow guide cover 193 is provided on the pipe body 191. The flow guide cover 193 is arranged to be slidable on the pipe body 191, so that when the flow guide cover 193 comes into contact with the upper water outlet of the ladle, it can slide upward under force, thereby reducing the damage of the flow guide cover 193 caused by collision. The limiting member includes a limiting ring. The limiting ring is fixedly sleeved on the lower end of the pipe body 191, and its outer diameter is larger than the diameter of the smaller-diameter opening of the flow guide cover 193, so that the flow guide cover 193 cannot slip off from the lower end of the pipe body 191. In some other embodiments of the present invention, the limiting member can also be other suitable components that can prevent the flow guide cover 193 from slipping off from the lower end of the pipe body 191.

[0040] On the other hand, the flow guide cover 193 can slide on the pipe body 191, and the limiting member can prevent the flow guide cover 193 from slipping off from the lower end of the pipe body 191, so that during the rising process of the quicksand conduit, the flow guide cover 193 is always located at the lower end of the drainage sand conduit 19, which can reduce the situation that the drainage sand is spilled on the bottom surface of the ladle during the rising process of the drainage sand conduit 19, and further helps to improve the purity of the molten steel.

[0041] Please continue to refer to Figure 2 , the drainage sand conduit 19 further includes a safety ring 194. The safety ring 194 is sleeved on the outer wall of the pipe body 191. The safety ring 194 is located between the lower end of the pipe body 191 and the second translation assembly. The diameter of the safety ring 194 is larger than the diameter of the installation space to limit the rising stroke of the drainage sand conduit 19. The safety ring 194 can prevent the drainage sand conduit 19 from continuing to rise after the safety ring 194 comes into contact with the edge of the lower opening of the installation space, avoiding the risk of the drainage sand conduit 19 falling out of the installation space due to excessive rising height, and improving the safety of the drainage sand conduit 19 during rising.

[0042] By using the above-mentioned fine adjustment and centering device 001 for the ladle drainage sand conduit, the drainage sand filling device of the present invention can accurately and quickly adjust the position of the drainage sand conduit 19, reduce the situation that the drainage sand cannot accurately enter the upper water outlet of the ladle due to the shaking of the drainage sand conduit 19, improve the stability during drainage sand filling, and at the same time reduce the waste caused by the spillage of the drainage sand. The drainage sand filling device of the present invention also has the function of fixing the drainage sand conduit 19, and can prevent the drainage sand conduit 19 from falling and causing danger.

[0043] Secondly, the drainage sand filling device of the present invention can effectively improve the filling quality of the drainage sand at the ladle water outlet, meet the precise control requirements of filling the drainage sand at the ladle water outlet to a bun shape, prevent the drainage sand from accumulating at the edge of the upper water outlet of the ladle, and improve the self-opening rate of the drainage sand at the ladle water outlet.

[0044] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A ladle drainage sand conduit fine-tuning and centering device, characterized in that: It comprises a mounting platform (1), a fixing plate (2), a movable frame (3), a first translation assembly, a second translation assembly and two guide rails (4); wherein: The installation platform (1) is horizontally fixedly arranged just above the ladle, and is provided with a guide hole (5) for the sand drainage conduit to pass through; the two guide rails (4) are arranged parallel to each other on the upper side of the installation platform (1), and the guide hole (5) is located between the two; The movable frame (3) is slidably arranged horizontally on the upper side of the two guide rails (4) and can slide along the length direction of the two guide rails (4); the fixed plate (2) is vertically arranged on the upper side of the installation platform (1); the guide rail (4) is perpendicular to the plane where the fixed plate (2) is located; The first translation assembly comprises a first adjusting screw (6), an adjusting nut (7) and a first positioning pin (8); the first adjusting screw (6) passes through the fixed plate (2) and the movable frame (3) in sequence along a direction parallel to the length direction of the guide rail (4), and is threadedly connected to the fixed plate (2); the adjusting nut (7) is threadedly connected to an end of the first adjusting screw (6) passing through the movable frame (3); the first positioning pin (8) passes through the first adjusting screw (6) to limit the relative movement between the first adjusting screw (6) and the movable frame (3); The second translation assembly comprises a support rod (9), a fixed half ring (10), a movable half ring (11), a sleeve (12), a locking piece (13) and a second adjusting screw (14); the second adjusting screw (14) penetrates into the movable frame (3) from the outside to the inside along a direction perpendicular to the length direction of the guide rail (4) and is threadedly matched with the movable frame (3); the sleeve (12) is coaxially sleeved on the end of the second adjusting screw (14) passing through the movable frame (3); the second adjusting screw (14) and the sleeve (12) can be locked by the locking piece (13); The fixed half ring (10) is fixedly connected to the support rod (9); the movable half ring (11) is detachably arranged on the support rod (9); the fixed half ring (10) and the movable half ring (11) are butt-jointed to form an installation space between the two in which the drainage sand conduit can be vertically embraced.

2. The ladle drainage sand conduit fine-tuning and centering device according to claim 1, characterized in that: The movable half ring (11) comprises a ring body (111), a first ear plate (112) and a second ear plate (113); The shape of the ring body (111) is half of a circular ring; the first ear plate (112) and the second ear plate (113) are respectively fixedly connected to the two ends of the ring body (111); The first ear plate (112) is connected to the support rod (9) via a movable bolt (1121), so that the movable half ring (11) is hinged to the support rod (9) via the movable bolt (1121); the axis of the movable bolt (1121) is the hinge axis; The second ear plate (113) is connected to the support rod (9) via a second positioning pin (1131).

3. The ladle drainage sand conduit fine-tuning and centering device according to claim 1, characterized in that: The second translation assembly also includes a guide tube (15); One end of the guide tube (15) is fixedly connected to the inner wall of the movable frame (3) and is coaxial with the support rod (9); one end of the support rod (9) that penetrates into the movable frame (3) is inserted into the guide tube (15) and can slide along its own axis in the guide tube (15) or rotate around its own axis.

4. A drainage sand filling device, characterized in that: The device comprises the ladle drainage sand conduit fine-tuning and centering device as claimed in any one of claims 1 to 3, and further comprises a crossbeam (16), a lifting device (17), a suspension cable (18) and a drainage sand conduit (19); wherein: The crossbeam (16) is fixedly mounted above the ladle; The lifting device (17) is arranged on the crossbeam (16), and is connected to the upper end of the drainage sand conduit (19) through the suspension cable (18), so as to drive the drainage sand conduit to rise and fall; The ladle drainage sand conduit fine-tuning and centering device is located between the lifting device (17) and the ladle; the drainage sand conduit (19) passes through the ladle drainage sand conduit fine-tuning and centering device and then descends to the upper water inlet of the ladle.

5. The drainage sand filling device according to claim 4, characterized in that: The sand drainage conduit (19) comprises a tube body (191) and a funnel (192) arranged at the upper end of the tube body (191); The funnel (192) is conical in shape, and its opening with a smaller diameter is connected to the upper end of the tube body (191); the volume of the funnel (192) is greater than the total volume of drainage sand required by the ladle.

6. The drainage sand filling device according to claim 5, characterized in that: The sand drainage conduit (19) further comprises a safety ring (194); The safety ring (194) is sleeved on the outer wall of the tube body (191); the safety ring (194) is located between the lower end of the tube body (191) and the second translation assembly; the diameter of the safety ring (194) is greater than the diameter of the installation space, so as to limit the ascending stroke of the drainage sand conduit (19).

7. The drainage sand filling device according to claim 6, characterized in that: The sand drainage conduit (19) further comprises a flow guide cover (193); The deflector (193) is conical in shape; the deflector (193) is connected to the lower end opening of the tube body (191), and its opening with a larger diameter faces the upper water inlet of the ladle, and is used to collect drainage sand discharged from the lower end of the tube body (191).

8. The drainage sand filling device according to claim 7, characterized in that: The deflector (193) is sleeved on the outer wall of the tube body (191) through its opening with a smaller diameter, and can slide on the tube body (191) along the axial direction of the tube body (191); The tube body (191) is provided with a limiting member for limiting the sliding of the air guide cover (193).

9. The drainage sand filling device according to claim 8, characterized in that: The limiting member comprises a limiting ring; The limiting ring is fixedly sleeved on the lower end of the tube body (191), and its outer diameter is larger than the diameter of the opening of the air guide cover (193) with a smaller diameter, so that the air guide cover (193) cannot slip off the lower end of the tube body (191).

10. The drainage sand filling device according to claim 4, characterized in that: The lifting device (17) comprises an electric hoist; The electric hoist is arranged on the lower side of the crossbeam (16) and is used for winding and unwinding the suspension cable (18).

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