A device for baking a water gap on a middle package

Abstract

The utility model relates to a middle package upper nozzle baking device belongs to the steelmaking continuous casting equipment technical field. Including base plate and support plate, support plate is located the upside of base plate and is provided with height adjusting assembly between both, the upper surface center of support plate is detachably connected with the fixed sleeve of upper end opening, the upper end of fixed sleeve is detachably connected with one group or more groups of intermediate sleeve, and the upper and lower ends of intermediate sleeve are all open settings. The utility model discloses through setting fixed sleeve, intermediate sleeve and telescopic sleeve, makes the height of whole baking sleeve be in adjustable state, so after determining the axial distance between the inner bottom wall of fixed sleeve and upper nozzle lower end opening, the upper end of telescopic sleeve still can keep abutment with the outer bottom wall of tundish. Through the cooperation of height measuring assembly and limit stud, the axial distance between the inner bottom wall of fixed sleeve and upper nozzle lower end opening can be accurately controlled, so as to ensure the baking intensity and uniformity, and the baking effect of upper nozzle is enhanced.

Description

Technical Field

[0001] This utility model relates to the technical field of steelmaking continuous casting equipment, and in particular to a tundish top nozzle baking device. Background Technology

[0002] The tundish top nozzle (hereinafter referred to as "top nozzle") is a key disposable refractory component in continuous casting production at steel plants. Installed at the bottom of the tundish, its upper part, together with the stopper rod, forms a molten steel flow control system, while its lower part connects to the bottom nozzle, jointly guiding molten steel into the crystallizer. Since the top nozzle comes into direct contact with the high-temperature molten steel during casting, its preheating is crucial. If the top nozzle is not sufficiently preheated before casting and fails to reach the specified temperature, it can easily cause the molten steel to condense and freeze inside, or crack due to insufficient thermal shock stability, ultimately leading to shortened refractory life, casting interruption, or even safety accidents.

[0003] To address the issue of drying the inlet of a tundish, various solutions have been proposed in existing technologies. A search revealed a novel tundish inlet drying device (CN220259535U), comprising a drying sleeve and an adjusting bracket. A flexible graphene washer is fixedly mounted on the inner circumference of the upper end of the drying sleeve. A lead screw is rotatably connected within the adjusting bracket. When drying the inlet, the drying sleeve is moved directly below it. Rotating the handle drives the drive and driven gears, which in turn move the lead screw and lead screw nut. During this movement, the drying sleeve above the connecting sleeve moves upwards, fitting onto the inlet for drying. This connection method is suitable for drying inlets of different heights and sizes, offering greater versatility. Furthermore, the addition of the flexible graphene washer at the upper end of the drying sleeve allows for deformation during the upward movement of the drying sleeve, ensuring a tight seal at the joint and improving drying quality.

[0004] However, in actual use, the following defects were found in the device: Since the height of the baking sleeve is fixed and its final position depends on the contact between the upper end face of the baking sleeve and the bottom wall of the tundish, the axial distance between the inner bottom wall of the baking sleeve and the lower opening of the water inlet cannot be precisely controlled, which makes it difficult to guarantee the baking intensity and uniformity, and ultimately affects the overall baking effect of the water inlet. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this utility model provides a baking device for the top nozzle of a bun. The technical solution of this utility model is as follows: A baking device for the top nozzle of a liner includes a base plate and a support plate. The support plate is located directly above the base plate, and a height adjustment component is provided between the two. A fixed sleeve with an open top end is detachably connected to the center of the upper surface of the support plate. One or more sets of intermediate sleeves are detachably connected to the upper end of the fixed sleeve. Both the upper and lower ends of the intermediate sleeves are open. A telescopic sleeve is detachably connected to the upper end of the uppermost intermediate sleeve. Both the upper and lower ends of the telescopic sleeve are open. A height measuring component for measuring the height of the lower end of the top nozzle is connected to one side of the base plate. The height measuring component includes a vertical rail and an extension rod. The vertical rail is fixedly connected to one side of the upper surface of the base plate. The extension rod is vertically slidable inside the vertical rail and extends upward, and the two are fixed together by a fastener. The upper end of the extension rod has a horizontally penetrating groove, and a measuring rod slides horizontally inside the groove. The support plate is also connected to a limiting stud that cooperates with the measuring rod and is height-adjustable.

[0006] Optionally, the telescopic sleeve includes a main sleeve and a secondary sleeve. The upper surface of the side wall of the main sleeve is provided with an annular slot along the axial direction. The lower end of the secondary sleeve is slidably connected inside the annular slot. An elastic element connects the main sleeve and the secondary sleeve.

[0007] Optionally, the elastic element includes multiple sets of fixed lugs and multiple sets of movable lugs. The multiple sets of fixed lugs are circumferentially and evenly fixed to the outer wall of the main sleeve, and the multiple sets of movable lugs are circumferentially and evenly fixed to the outer wall of the auxiliary sleeve. The multiple sets of fixed lugs correspond one-to-one with the multiple sets of movable lugs, and the movable lugs are located directly above the fixed lugs. A rectangular notch is provided at the upper end of the outer wall of the main sleeve corresponding to the position of each movable lug. The movable lug is slidably connected in the rectangular notch at the corresponding position. A guide post is vertically and fixedly connected to the upper surface of the fixed lug. The top end of the guide post slides upward through the movable lug at the corresponding position, and a limiting nut is threaded on the top end of the guide post. A spring is sleeved on the outer side of the guide post, and the spring abuts between the fixed lug and the movable lug.

[0008] Optionally, a sealing ring is embedded in the inner outward sidewall of the annular slot below the rectangular notch, and the sealing ring is sandwiched between the annular slot and the secondary sleeve.

[0009] Optionally, a first flange is fixedly fitted on the outer side of the lower end of the fixed sleeve, and the first flange is fixedly connected to the support plate by bolts. A second flange is fixedly fitted on the outer side of the upper opening of the fixed sleeve. A third flange is fixedly fitted on the outer side of both the upper and lower openings of the intermediate sleeve. The lower third flange is fixedly connected to the second flange by bolts. A fourth flange is fixedly fitted on the outer side of the lower end of the main sleeve, and the upper third flange is fixedly connected to the fourth flange by bolts.

[0010] Optionally, the fixing component includes two sets of short studs. Movable slots are provided through both sides of the vertical rail. The two sets of short studs are respectively fixedly connected to the lower ends of the extension rod. The two sets of short studs pass through the movable slots at corresponding positions and extend to the outside of the vertical rail. Locking nuts are threaded on the outer side of the short studs.

[0011] Optionally, slots are provided through both sides of the surface of the substrate, and movable components are connected inside both sets of slots.

[0012] Optionally, the moving component includes two sets of side slide rails, which are symmetrically arranged on the left and right sides of the slot. The upper ends of the two sets of side slide rails are fixedly connected to a support beam. A threaded hole is provided through the center of the surface of the support beam. A movable plate is slidably connected between the two sets of side slide rails. An adjusting screw for driving the movable plate to slide vertically along the side slide rail is threaded inside the threaded hole. The lower end of the adjusting screw is rotatably connected to the upper surface of the movable plate. Universal wheels are fixedly connected to the left and right sides of the lower surface of the movable plate.

[0013] Optionally, guide holes are provided through the four corners of the support plate, and guide rods are fixedly connected to the left and right sides of the upper surface of the support beam in both sets of moving components. The guide rods are slidably connected in the guide holes at the corresponding positions.

[0014] Optionally, a threaded hole is provided through the surface of the support plate and on the side near the height measuring component. The limiting stud is threaded into the inside of the threaded hole, and a contact pad is fixedly connected to the upper end of the limiting stud.

[0015] All of the above optional technical solutions can be combined arbitrarily, and this utility model does not provide a detailed description of the structure after each combination.

[0016] The beneficial effects of this utility model through the above solution are as follows: This invention, by setting a fixed sleeve, an intermediate sleeve, and a telescopic sleeve, makes the height of the entire baking sleeve adjustable. In this way, after determining the axial distance between the inner bottom wall of the fixed sleeve and the lower opening of the water inlet, the upper end of the telescopic sleeve can still abut against the outer bottom wall of the intermediate ladle, so as to ensure the baking effect of the water inlet.

[0017] By cooperating with the height measuring component and the limiting stud, the axial distance between the bottom wall of the fixed sleeve and the lower opening of the water inlet can be precisely controlled to ensure the baking intensity and uniformity, thereby enhancing the baking effect of the water inlet.

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall appearance structure of the baking device for the middle package water inlet provided by this utility model in one working state; Figure 2 A front view of the baking device for the top water inlet of the intermediate package provided by this utility model in one working state; Figure 3 for Figure 1 Front sectional view; Figure 4 for Figure 3 Enlarged structural diagram at point A; Figure 5 An exploded structural diagram of the baking device for the top water inlet of the intermediate package provided by this utility model; Figure 6 This is an exploded structural diagram of the support plate, fixed sleeve, intermediate sleeve, telescopic sleeve and limiting stud in this utility model; Figure 7 This is an exploded structural diagram of the telescopic sleeve in this utility model; Figure 8 This is an exploded structural diagram of the base plate, height measuring component, and moving component in this utility model.

[0020] Labels in the diagram: 1. Base plate; 11. Hole; 2. Height adjustment assembly; 3. Support plate; 31. Guide hole; 32. Threaded hole one; 4. Fixed sleeve; 41. First flange; 42. Second flange; 5. Intermediate sleeve; 51. Third flange; 511. Sealing gasket; 6. Telescopic sleeve; 61. Main sleeve; 611. Annular slot; 612. Rectangular notch; 62. Secondary sleeve; 63. Elastic element; 631. Fixed lug; 632. Guide post; 633. Movable lug; 634. Limiting screw 635. Spring; 64. Sealing ring; 65. Fourth flange; 7. Height measuring assembly; 71. Vertical rail; 711. Movable groove; 72. Extension rod; 721. Slide groove; 73. Fixing component; 731. Short stud; 732. Locking nut; 74. Measuring rod; 741. Limit bolt; 8. Moving assembly; 81. Side slide rail; 82. Support beam; 821. Threaded hole two; 83. Movable plate; 84. Adjusting screw; 85. Caster wheel; 86. Guide rod; 9. Limit stud; 91. Contact pad. Detailed Implementation

[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0022] Please see Figure 1-8 This utility model provides a baking device for the upper water inlet of a middle package, including a base plate 1 and a support plate 3. The support plate 3 is located directly above the base plate 1 and a height adjustment component 2 is provided between the two. A fixed sleeve 4 with an open upper end is detachably connected to the center of the upper surface of the support plate 3. One or more sets of intermediate sleeves 5 are detachably connected to the upper end of the fixed sleeve 4. Both the upper and lower ends of the intermediate sleeves 5 are open. A telescopic sleeve 6 is detachably connected to the upper end of the uppermost intermediate sleeve 5. Both the upper and lower ends of the telescopic sleeve 6 are open. A height measuring component 7 for measuring the lower end height of the water inlet is connected to one side of the base plate 1. The height measuring component 7 includes a vertical rail 71 and an extension rod 72. The vertical rail 71 is fixedly connected to one side of the upper surface of the base plate 1. The extension rod 72 is vertically slidable inside the vertical rail 71 and extends upward. The two are fixed together by a fastener 73. The upper end of the extension rod 72 is horizontally opened with a sliding groove 721. A measuring rod 74 slides horizontally inside the sliding groove 721. Limiting bolts 741 are also connected to both ends of the side wall of the measuring rod 74, so that the measuring rod 74 slides out of the sliding groove 721. The support plate 3 is also connected to a limiting stud 9 that cooperates with the measuring rod 74 and is height adjustable.

[0023] This invention, by setting up a fixed sleeve 4, an intermediate sleeve 5, and a telescopic sleeve 6, allows the height of the entire baking sleeve to be adjustable. This ensures that, after determining the axial distance between the inner bottom wall of the fixed sleeve 4 and the lower opening of the inlet, the upper end of the telescopic sleeve 6 can still abut against the outer bottom wall of the tundish, guaranteeing the baking effect of the inlet. Specifically, the fixed sleeve 4, intermediate sleeve 5, and telescopic sleeve 6 together form the baking sleeve, and the height of the entire baking sleeve can be reasonably adjusted according to the actual length of the inlet. First, a suitable number of intermediate sleeves 5 are installed on the upper end of the fixed sleeve 4 to ensure that the height of the entire baking sleeve matches the length of the inlet. Then, the height of the support plate 3 and the baking sleeve is adjusted using the height adjustment component 2. During this process, the telescopic sleeve 6 can be finely adjusted in height to ensure that, while maintaining the axial distance between the inner bottom wall of the fixed sleeve 4 and the lower opening of the inlet, the upper opening of the telescopic sleeve 6 can still abut against the outer bottom wall of the tundish. Secondly, when a single sleeve is damaged, it can be replaced individually, eliminating the need for overall replacement and reducing subsequent maintenance costs.

[0024] By cooperating with the height measuring component 7 and the limiting stud 9, the axial distance between the inner bottom wall of the fixing sleeve 4 and the lower opening of the water inlet can be precisely controlled to ensure baking intensity and uniformity, thus enhancing the baking effect of the water inlet. Specifically, firstly, the relative height between the lower opening of the water inlet and the substrate 1 is measured using the height measuring component 7. Next, the height of the limiting stud 9 is adjusted according to the preset axial distance between the inner bottom wall of the fixing sleeve 4 and the lower opening of the water inlet. Then, the height of the support plate 3 is adjusted using the height adjustment component 2. At this time, the support plate 3 drives the limiting stud 9 to move upward synchronously until the limiting stud 9 contacts the lower surface of the measuring rod 74.

[0025] The specific height measurement process of the height measuring component 7 is as follows: the entire device is moved below the water inlet, then the length of the extension rod 72 extending out of the vertical rail 71 is adjusted until the upper surface of the measuring rod 74 away from the extension rod 72 contacts the lower opening of the water inlet. Then, the relative position of the extension rod 72 and the vertical rail 71 is fixed by the fixing component 73. Finally, the measuring rod 74 is slid laterally towards the extension rod 72 to provide sufficient position for the subsequent rise of the telescopic sleeve 6.

[0026] It should be noted that: 1. The sum of the relative height of the limiting stud 9 extending above the support plate 3 and the thickness of the measuring rod 74 is equal to the sum of the inner bottom wall thickness of the fixing sleeve 4 and the preset axial distance between the inner bottom wall of the fixing sleeve 4 and the lower opening of the inlet; 2. If Figure 3As shown, the height adjustment component 2 in this utility model adopts a screw adjustment structure, including a main support column fixed to the base plate 1 and a secondary support column fixed to the support plate 3. The secondary support column is slidably connected to the upper inner end of the main support column. A vertical screw is rotatably connected to the inner bottom wall of the main support column, and the screw is threadedly engaged with the secondary support column. When the crank handle is turned, the first bevel gear rotates, and the second bevel gear meshing with it rotates synchronously, thereby driving the screw to rotate inside the main support column. At this time, the secondary support column will move upward relative to the main support column, thereby driving the support plate to move upward. 3. The inner walls of the fixed sleeve 4, the intermediate sleeve 5, and the telescopic sleeve 6 are all made of high-temperature resistant material, such as high-temperature resistant asbestos.

[0027] Furthermore, the telescopic sleeve 6 includes a main sleeve 61 and a secondary sleeve 62. The upper surface of the side wall of the main sleeve 61 is provided with an annular slot 611 along the axial direction. The lower end of the secondary sleeve 62 is slidably connected inside the annular slot 611. An elastic element 63 is connected between the main sleeve 61 and the secondary sleeve 62.

[0028] Specifically, under the action of the elastic element 63, the secondary sleeve 62 is always located at the uppermost position inside the annular slot 611. When the height adjustment assembly 2 adjusts the height of the support plate 3, the fixed sleeve 4, the intermediate sleeve 5, and the telescopic sleeve 6, if the limiting stud 9 does not contact the measuring rod 74 when the upper end face of the secondary sleeve 62 contacts the outer bottom wall of the intermediate tundish, it indicates that further upward adjustment is needed. During the adjustment process, the secondary sleeve 62 slides into the annular slot 611, at which time the elastic element 63 is in a compressed state until the limiting stud 9 contacts the measuring rod 74. At this time, under the action of the elastic element 63, the upper end face of the secondary sleeve 62 can maintain good contact with the outer bottom wall of the intermediate tundish.

[0029] Preferably, a flexible graphene gasket can also be fixedly installed on the upper end face of the secondary sleeve 62 to ensure the sealing of the joint between the two.

[0030] Furthermore, the elastic element 63 includes multiple sets of fixed lugs 631 and multiple sets of movable lugs 633. The multiple sets of fixed lugs 631 are circumferentially and evenly fixed to the outer wall of the main sleeve 61, and the multiple sets of movable lugs 633 are circumferentially and evenly fixed to the outer wall of the auxiliary sleeve 62. The multiple sets of fixed lugs 631 and multiple sets of movable lugs 633 correspond one-to-one, and the movable lugs 633 are located directly above the fixed lugs 631. The upper end of the outer wall of the main sleeve 61 is open to correspond to the position of each movable lug 633. A rectangular notch 612 is provided, and a movable ear 633 is slidably connected in the rectangular notch 612 at the corresponding position. A guide post 632 is vertically fixedly connected to the upper surface of the fixed ear 631. The top end of the guide post 632 slides upward through the movable ear 633 at the corresponding position, and a limit nut 634 is threaded on the top end of the guide post 632. A spring 635 is sleeved on the outside of the guide post 632, and the spring 635 abuts between the fixed ear 631 and the movable ear 633.

[0031] Specifically, when the secondary sleeve 62 slides relative to the main sleeve 61, the movable lug 633 slides vertically outside the guide post 632 at the corresponding position. Under the action of the limiting nut 634, the sliding distance of the movable lug 633 can be limited within the length range of the guide post 632, thereby preventing the secondary sleeve 62 from slipping off the upper end of the main sleeve 61. During the height adjustment process, the secondary sleeve 62 slides downward relative to the main sleeve 61, at which time the spring 635 is gradually compressed.

[0032] Furthermore, a sealing ring 64 is embedded in the outward-facing side wall of the annular slot 611 and below the rectangular notch 612. The sealing ring 64 is sandwiched between the annular slot 611 and the secondary sleeve 62.

[0033] Specifically, by setting a sealing ring 64, a dynamic seal can be achieved between the main sleeve 61 and the auxiliary sleeve 62. The sealing ring 64 can be made of flexible graphene material.

[0034] Furthermore, a first flange 41 is fixedly fitted on the outer side of the lower end of the fixed sleeve 4. The first flange 41 is fixedly connected to the support plate 3 by bolts. A second flange 42 is fixedly fitted on the outer side of the upper opening of the fixed sleeve 4. A third flange 51 is fixedly fitted on the outer side of both the upper and lower openings of the intermediate sleeve 5. The lower third flange 51 is fixedly connected to the second flange 42 by bolts. A fourth flange 65 is fixedly fitted on the outer side of the lower end of the main sleeve 61. The upper third flange 51 is fixedly connected to the fourth flange 65 by bolts.

[0035] Specifically, the support plate 3 and the fixed sleeve 4, the fixed sleeve 4 and the intermediate sleeve 5, and the intermediate sleeve 5 and the main sleeve 61 all adopt a bolt-removable structure for easy disassembly and maintenance. Secondly, a high-temperature resistant sealing gasket 511 is embedded on the end face of the third flange 51 away from the intermediate sleeve 5 to enhance the overall sealing performance of the assembled structure. High-temperature resistant sealing gaskets 511 are also provided on the upper end face of the second flange 42 and the lower end face of the fourth flange 65.

[0036] Furthermore, the fastener 73 includes two sets of short studs 731. Movable grooves 711 are provided through the two side walls of the vertical rail 71. The two sets of short studs 731 are respectively fixedly connected to the lower ends of the extension rod 72. The two sets of short studs 731 pass through the movable grooves 711 at corresponding positions and extend to the outside of the vertical rail 71. Locking nuts 732 are threaded on the outer side of the short studs 731.

[0037] Specifically, when adjusting the length of the extension rod 72 extending beyond the vertical rail 71, the extension rod 72 drives the two sets of short studs 731 to slide within the corresponding movable grooves 711. After the adjustment is in place, the locking nuts 732 on the outside of the short studs 731 are tightened, thereby locking the relative position of the extension rod 72 and the vertical rail 71.

[0038] Furthermore, slots 11 are provided through both sides of the surface of the substrate 1, and movable components 8 are connected inside the two sets of slots 11.

[0039] Specifically, by setting the movable component 8, the overall device can be moved easily, and the device can be aligned and adjusted during the alignment of the telescopic sleeve 6 with the water inlet.

[0040] Furthermore, the movable component 8 includes two sets of side slide rails 81, which are symmetrically arranged on the left and right sides of the slot 11. The upper ends of the two sets of side slide rails 81 are fixedly connected to a support beam 82. A threaded hole 821 is opened through the center of the surface of the support beam 82. A movable plate 83 is slidably connected between the two sets of side slide rails 81. An adjusting screw 84 for driving the movable plate 83 to slide vertically along the side slide rails 81 is threaded inside the threaded hole 821. The lower end of the adjusting screw 84 is rotatably connected to the upper surface of the movable plate 83. Universal wheels 85 are fixedly connected to both the left and right sides of the lower surface of the movable plate 83.

[0041] Specifically, when the device needs to be moved, the two sets of adjusting screws 84 are rotated. The lower end of the adjusting screws 84 drives the movable plate 83 to move downward, so that the caster wheel 85 gradually contacts the ground, and the base plate 1 gradually detaches from the ground. After moving into position, the adjusting screws 84 are rotated in the opposite direction. The lower end of the adjusting screws 84 drives the movable plate 83 to move upward. At this time, the caster wheel 85 gradually lifts off the ground until the base plate 1 contacts the ground, ensuring that a stable supporting force can be provided to the support plate 3 during use.

[0042] Preferably, scale markings can be provided on the outside of the adjusting screw 84, so that the operator can quickly adjust the two sets of adjusting screws 84 to the same height.

[0043] Furthermore, guide holes 31 are provided through the four corners of the support plate 3, and guide rods 86 are fixedly connected to the left and right sides of the upper surface of the support beam 82 in the two sets of moving components 8. The guide rods 86 are slidably connected in the guide holes 31 at the corresponding positions.

[0044] Specifically, when the height adjustment component 2 adjusts the movement of the support plate 3, the four sets of guide rods 86 slide with the guide holes 31 at the four corners of the support plate 3 to ensure that the support plate 3 can move along a predetermined path.

[0045] Furthermore, a threaded hole 32 is provided through the surface of the support plate 3 and on the side near the height measuring component 7. The limiting stud 9 is threaded into the inside of the threaded hole 32, and a contact pad 91 is fixedly connected to the upper end of the limiting stud 9.

[0046] Specifically, the relative height of the limiting stud 9 on the support plate 3 can be adjusted by manually rotating the lower end of the limiting stud 9. The contact pad 91 provided at the upper end of the limiting stud 9 can be made of rubber to reduce the impact when the top of the limiting stud 9 contacts the measuring rod 74.

[0047] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A baking device for the top sprue of a ladle, characterized in that: The system includes a base plate (1) and a support plate (3). The support plate (3) is located directly above the base plate (1) and a height adjustment component (2) is provided between the two. A fixed sleeve (4) with an open top is detachably connected to the center of the upper surface of the support plate (3). One or more intermediate sleeves (5) are detachably connected to the upper end of the fixed sleeve (4). Both the upper and lower ends of the intermediate sleeves (5) are open. A telescopic sleeve (6) is detachably connected to the upper end of the uppermost intermediate sleeve (5). Both the upper and lower ends of the telescopic sleeve (6) are open. A height measuring component (7) for measuring the height of the lower end of the water inlet is connected to one side of the base plate (1). The height measuring component (7) includes a vertical rail (71) and an extension rod (72). The vertical rail (71) is fixedly connected to one side of the upper surface of the base plate (1). The extension rod (72) is vertically slidable inside the vertical rail (71) and extends upward. The two are fixed together by a fastener (73). The upper end of the extension rod (72) is horizontally provided with a groove (721). A measuring rod (74) slides horizontally inside the groove (721). The support plate (3) is also connected to a limiting stud (9) that cooperates with the measuring rod (74) and is height adjustable.

2. The baking device for the top sprue of a ladle according to claim 1, characterized in that, The telescopic sleeve (6) includes a main sleeve (61) and a secondary sleeve (62). The upper surface of the side wall of the main sleeve (61) is provided with an annular slot (611) along the axial direction. The lower end of the secondary sleeve (62) is slidably connected inside the annular slot (611). An elastic element (63) is connected between the main sleeve (61) and the secondary sleeve (62).

3. The baking device for the top sprue of a ladle according to claim 2, characterized in that, The elastic element (63) includes multiple sets of fixed lugs (631) and multiple sets of movable lugs (633). The multiple sets of fixed lugs (631) are circumferentially and evenly fixed to the outer wall of the main sleeve (61), and the multiple sets of movable lugs (633) are circumferentially and evenly fixed to the outer wall of the auxiliary sleeve (62). The multiple sets of fixed lugs (631) and the multiple sets of movable lugs (633) correspond one-to-one, and the movable lugs (633) are located directly above the fixed lugs (631). The upper end of the outer wall of the main sleeve (61) is provided with a corresponding position for each movable lug (633). There is a rectangular notch (612), and the movable ear (633) is slidably connected in the rectangular notch (612) at the corresponding position. The upper surface of the fixed ear (631) is vertically fixedly connected to a guide post (632). The top end of the guide post (632) slides upward through the movable ear (633) at the corresponding position, and the top end of the guide post (632) is threaded with a limiting nut (634). A spring (635) is sleeved on the outside of the guide post (632), and the spring (635) abuts between the fixed ear (631) and the movable ear (633).

4. The baking device for the top sprue of a ladle according to claim 3, characterized in that, A sealing ring (64) is embedded in the outward-facing side wall of the annular slot (611) and below the rectangular notch (612). The sealing ring (64) is sandwiched between the annular slot (611) and the secondary sleeve (62).

5. The baking device for the top water inlet of a ladle according to claim 2, characterized in that, The lower outer side of the fixed sleeve (4) is fixedly fitted with a first flange (41), which is fixedly connected to the support plate (3) by bolts. The upper outer side of the fixed sleeve (4) is fixedly fitted with a second flange (42). The upper and lower outer sides of the opening of the intermediate sleeve (5) are both fixedly fitted with a third flange (51). The lower third flange (51) is fixedly connected to the second flange (42) by bolts. The lower outer side of the main sleeve (61) is fixedly fitted with a fourth flange (65), which is fixedly connected to the upper third flange (51) and the fourth flange (65) by bolts.

6. The baking device for the top sprue of a ladle according to claim 1, characterized in that, The fastener (73) includes two sets of short studs (731). The two side walls of the vertical rail (71) are provided with movable grooves (711). The two sets of short studs (731) are respectively fixedly connected to the lower ends of the extension rod (72). The two sets of short studs (731) pass through the movable grooves (711) at the corresponding positions and extend to the outside of the vertical rail (71). The outer side of the short studs (731) is threaded with a locking nut (732).

7. The baking device for the top sprue of a ladle according to claim 1, characterized in that, The substrate (1) has slots (11) through both sides of its surface, and each of the two slots (11) is connected to a moving component (8).

8. The baking device for the top water inlet of a ladle according to claim 7, characterized in that, The moving component (8) includes two sets of side slide rails (81). The two sets of side slide rails (81) are symmetrically arranged on the left and right sides of the slot (11). The upper ends of the two sets of side slide rails (81) are fixedly connected to a support beam (82). A threaded hole (821) is opened through the center of the surface of the support beam (82). A movable plate (83) is slidably connected between the two sets of side slide rails (81). An adjusting screw (84) for driving the movable plate (83) to slide vertically along the side slide rail (81) is threaded inside the threaded hole (821). The lower end of the adjusting screw (84) is rotatably connected to the upper surface of the movable plate (83). Universal wheels (85) are fixedly connected to the left and right sides of the lower surface of the movable plate (83).

9. The baking device for the top sprue of a ladle according to claim 8, characterized in that, The support plate (3) has guide holes (31) through each of its four corners. The upper surfaces of the support beams (82) in the two sets of moving components (8) are fixedly connected to guide rods (86) on both sides. The guide rods (86) are slidably connected in the guide holes (31) at the corresponding positions.

10. A baking apparatus for the top sprue of a ladle according to claim 1, 6, or 7, characterized in that, A threaded hole (32) is provided on the surface of the support plate (3) and on the side near the height measuring component (7). The limiting stud (9) is threaded into the inside of the threaded hole (32). A contact pad (91) is fixedly connected to the upper end of the limiting stud (9).

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