A ladle nozzle seat brick lifting device and lifting method

Abstract

This invention provides a lifting device and method for lifting steel ladle nozzle bricks, including a vertical shaft, a lifting ring, a support member, and a sliding member. The lifting ring is fixed to the top of the vertical shaft, and the support member is coaxially fixed to the bottom of the vertical shaft. The sliding member is coaxially slidably sleeved on the vertical shaft, and the sliding member can rotate around the central axis of the vertical shaft. Multiple vertically rotatable support legs are evenly distributed around the outer circumference of the sliding member. Multiple first receiving grooves for accommodating the support legs are evenly distributed around the outer circumference of the support member. When the support leg is located in the first receiving groove and the sliding member slides to the lowest position, the horizontal distance from the bottom of the support leg to the central axis of the vertical shaft is less than the minimum radius of the inner hole of the nozzle brick. When the support leg is removed from the first receiving groove and the sliding member slides to the lowest position, the horizontal distance from the bottom of the support leg to the central axis of the vertical shaft is greater than the minimum radius of the inner hole of the nozzle brick. The device of this invention has a simple structure and is easy to operate. Simply moving the support leg into or out of the first receiving groove switches the lifting device from the engaged state to the locked state, ensuring stable lifting.

Description

Technical Field

[0001] This invention belongs to the field of ladle nozzle construction technology, specifically relating to a lifting device and method for lifting ladle nozzle seat bricks during the ladle nozzle construction process. Background Technology

[0002] After the steel ladle reaches the end of its service life, it needs to be re-laid with refractory materials. When installing the ladle nozzle seat bricks, two steel ropes are usually used to tie the two sides of the bricks before using an overhead crane for hoisting and manual adjustment. However, this hoisting method relies on two-point support, making it difficult to ensure even stress on both sides of the bricks. This makes the bricks prone to tilting during hoisting, posing a risk of falling from a height. Furthermore, because the hoisted bricks are tilted, their position needs to be repeatedly adjusted to maintain a normal (non-tilted) position. This not only prolongs the work time but also easily scrapes off some of the refractory mortar during the adjustment process, affecting the construction quality. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a lifting device and lifting method for ladle nozzle seat bricks, which can conveniently and stably lift ladle nozzle seat bricks, so as to overcome the defects of traditional lifting methods, in which ladle nozzle seat bricks are prone to tilting and falling, and the position of seat bricks needs to be repeatedly adjusted during placement.

[0004] To achieve the above and other related objectives, the present invention provides a lifting device for a ladle nozzle seat brick. The lifting device includes a vertical shaft, a lifting ring, a support member, and a sliding member. The vertical shaft, support member, and sliding member are all centrally symmetrical structures. The lifting ring is fixed to the top of the vertical shaft, and the support member is coaxially fixed to the bottom of the vertical shaft. The sliding member is coaxially slidably sleeved on the vertical shaft and can rotate around the central axis of the vertical shaft. The sliding member is located between the lifting ring and the support member. Multiple vertically rotatable support legs are evenly distributed around the outer circumference of the sliding member. The sliding member slides to… At the highest position, the bottom of the support leg is not higher than the position of the support member; the support member has multiple first receiving grooves evenly distributed around its outer circumference to accommodate the support leg, and the number of the first receiving grooves is equal to the number of support legs; when the support leg is located in the corresponding first receiving groove and the sliding member slides to the lowest position, the horizontal distance from the bottom of the support leg to the central axis of the vertical shaft is less than the minimum radius of the inner hole of the ladle nozzle seat brick; when the support leg exits the first receiving groove and the sliding member slides to the lowest position, the horizontal distance from the bottom of the support leg to the central axis of the vertical shaft is greater than the minimum radius of the inner hole of the ladle nozzle seat brick. The device of this invention has a simple and compact structure. When hoisting the ladle nozzle seat brick, simply position each support leg in its corresponding first receiving groove, then use a lifting device to hook the lifting ring of the lifting device, suspending the lifting device in the air. At this time, the sliding member will slide to the lowest point of the vertical shaft under its own weight. Since the diameter of the circle formed by the bottom ends of each support leg is smaller than the minimum diameter of the inner hole of the ladle nozzle seat brick, the entire lifting device can smoothly enter the inner hole of the ladle nozzle seat brick, allowing each support leg to contact the ground below the seat brick. Then, lower the lifting device... The lifting ring moves the support downwards, causing each support leg to completely retract from the first receiving groove on the support. Next, the lifting ring is rotated to displace the support legs from the first receiving groove. Finally, the lifting ring is moved upwards, causing the support to move upwards so that each support leg flips upwards and abuts against the inner wall of the ladle nozzle seat brick, thus realizing the lifting and installation of the ladle nozzle seat brick. The first receiving groove allows the lifting device to switch between the state of entering the inner hole and the state of being engaged in the inner hole, which is particularly suitable for lifting ladle nozzle seat bricks with an inner hole depth greater than the length of the vertical shaft.

[0005] Preferably, the support member has multiple second receiving slots evenly distributed around its outer periphery to accommodate the support legs, and the number of the second receiving slots is equal to the number of support legs; the second receiving slots are staggered with the first receiving slots; when the support leg is located in the second receiving slot and the sliding member slides to the lowest position, the horizontal distance from the bottom end of the support leg to the central axis of the vertical shaft is greater than the minimum radius of the inner hole of the ladle nozzle seat brick; this allows the operator to quickly and accurately move the support leg from the first receiving slot to the second receiving slot, improving switching efficiency.

[0006] Preferably, the bottom end of the support leg is provided with a rubber head to reduce damage to the ladle nozzle seat brick during hoisting.

[0007] Preferably, the slider has multiple double-ear seats evenly distributed around its outer periphery; each double-ear seat includes two spaced-apart connecting ears, and the two connecting ears on the same double-ear seat are connected by a horizontal pivot; the top of the support leg is rotatably mounted on a corresponding horizontal pivot via a horizontal pivot, so as to realize the up-and-down flipping of the support leg.

[0008] Preferably, the horizontal rotating shaft is the bolt shank of a bolt, and the bolt passes through two connecting lugs on the same double lug seat in sequence and is connected to a nut to facilitate the replacement of deformed support legs later.

[0009] Preferably, there are three support legs to ensure stable contact.

[0010] This invention also discloses a method for hoisting ladle nozzle seat bricks, which uses the aforementioned hoisting equipment to hoist the ladle nozzle seat bricks. The hoisting method includes the following steps:

[0011] Rotate the slider so that each support leg on the slider is located in the corresponding first receiving groove;

[0012] Use the lifting device to hook the lifting ring, so that the lifting device is suspended in the air; at this time, the sliding part slides to the lowest position under the action of gravity;

[0013] Insert the lifting device into the inner hole of the ladle nozzle seat brick until the supporting legs of the lifting device contact the ground;

[0014] Continue to lower the lifting ring, causing the support to move downwards until the support leg is completely out of the first receiving groove on the support;

[0015] Rotate the lifting ring to make the support rotate relative to the sliding member until the first receiving groove is misaligned with the support leg; then move the lifting device upward until the support member contacts the support leg;

[0016] Continue to move the lifting ring upwards, and the support legs will rotate upwards under the action of the support components until each support leg abuts against the inner wall of the inner hole of the ladle nozzle seat brick;

[0017] The mobile lifting device was used to lift and transport the sprue bearing bricks for the steel ladle.

[0018] As described above, the lifting device and method for lifting steel ladle nozzle seat bricks of the present invention have the following beneficial effects:

[0019] (1) The lifting device of the present invention has a simple structure and low cost. It uses multiple legs evenly distributed along the circumference to press against the inner wall of the inner hole of the seat brick to achieve relative fixation between the lifting device and the seat brick of the ladle nozzle. This makes the seat brick of the ladle nozzle evenly stressed during the lifting process, avoiding its tilting. This not only reduces the risk of it falling from a height during the lifting process, but also eliminates the need for subsequent position adjustment before the seat brick is placed, avoids scraping the pre-applied refractory mortar, and improves the lifting efficiency.

[0020] (2) When hoisting the ladle nozzle seat brick, simply position each support leg in the corresponding first receiving groove, and then use the lifting device to hook the lifting ring of the lifting tool to suspend the lifting tool in the air. At this time, the sliding part will slide to the lowest point of the vertical shaft under its own weight. Since the diameter of the circle formed by the bottom ends of each support leg is smaller than the minimum diameter of the inner hole of the ladle nozzle seat brick, the entire lifting tool can smoothly enter the inner hole of the ladle nozzle seat brick until each support leg contacts the ground below the seat brick. Then, move the lifting ring down so that the support member moves downward relative to the sliding part and each support leg completely exits from the first receiving groove on the support member. Next, rotate the lifting ring so that the support leg is misaligned with the first receiving groove. Finally, move the lifting ring up so that the support member moves upward so that each support leg flips upward and presses against the inner wall of the inner hole of the ladle nozzle seat brick, thus realizing the hoisting and installation of the ladle nozzle seat brick. It is not necessary to lengthen the vertical shaft, which can conveniently meet the hoisting needs of ladle nozzle seat bricks with deep inner holes. Attached Figure Description

[0021] Figure 1 This is a main cross-sectional view of the steel ladle nozzle seat brick.

[0022] Figure 2 This is a perspective view of the lifting device of the present invention.

[0023] Figure 3 This is a top view of the support component.

[0024] Figure 4 This is a top view showing the sliding component engaging with the support leg.

[0025] Explanation of reference numerals in the attached figures

[0026] Steel ladle nozzle seat brick 01, inner hole 02, upper hole 021, lower hole 022, vertical shaft 1, lifting ring 2, support 3, first receiving groove 31, second receiving groove 32, sliding part 4, through hole 4a, double ear seat 41, connecting ear 411, horizontal rotating shaft 42, support leg 5. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation 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.

[0028] Please see Figures 1 to 4It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0029] like Figure 1 As shown, the inner hole of the ladle nozzle seat brick 01 includes an upper hole 021 in the shape of an inverted frustum and a lower hole 022 in the shape of a regular frustum. The upper hole 021 and the lower hole 022 are coaxially arranged and interconnected. The bottom diameter of the upper hole 021 and the top diameter of the lower hole 022 can be the same or different. In this embodiment, it is preferred that the bottom diameter of the upper hole 021 and the top diameter of the lower hole 022 are the same, so as to facilitate the specific usage instructions of the lifting device below.

[0030] like Figures 2 to 4As shown, the present invention provides a lifting device for a steel ladle nozzle seat brick, including a vertical shaft 1, a lifting ring 2, a support member 3, and a sliding member 4; the vertical shaft 1, the support member 3, and the sliding member 4 are all centrally symmetrical structures; the lifting ring 2 is fixed to the top of the vertical shaft 1, and the support member 3 is coaxially fixed to the bottom of the vertical shaft 1; the sliding member 4 is located between the lifting ring 2 and the support member 3, and the sliding member 4 is provided with a through hole 4a for the vertical shaft 1 to pass through, so that the sliding member 4 is coaxially slidably sleeved on the vertical shaft 1 and rotates around the central axis of the vertical shaft 1; a plurality of vertically rotatable support legs 5 are evenly distributed around the outer circumference of the sliding member 4; when the sliding member 4 slides to the highest position of the vertical shaft 1, the bottom position of the support leg 5 is not higher than the position of the support member 3; a plurality of first receiving grooves 31 for accommodating the support legs 5 are evenly distributed around the outer circumference of the support member 3, and a protrusion is formed between two adjacent first receiving grooves 31; the number of first receiving grooves 31 is... The number of support legs 5 is equal to that of the support legs 1. When the support legs 5 are located in the corresponding first receiving groove 31 and the sliding member 4 slides to the lowest position of the vertical shaft 1, the horizontal distance from the bottom end of the support leg 5 to the central axis of the vertical shaft 1 is less than the minimum radius of the inner hole 02 of the ladle nozzle seat brick 01 (that is, the diameter of the circle where the bottom end of each support leg 5 is located is less than the top surface diameter of the lower hole 021 so that the lifting device can smoothly enter the inner hole 02 of the ladle nozzle seat brick 01). When the support legs 5 exit the first receiving groove 31 and the protrusion between the two adjacent first receiving grooves 31, and the sliding member 4 slides to the lowest position, the horizontal distance from the bottom end of the support leg 5 to the central axis of the vertical shaft 1 is greater than the minimum radius of the inner hole 02 of the ladle nozzle seat brick 01 (that is, the diameter of the circle where the bottom end of each support leg 5 is located is greater than the top surface diameter of the lower hole 021 so as to ensure that each support leg 5 can be pressed against the inner wall of the lower hole 021 and prevent the lifting device from coming out of the inner hole 021).

[0031] It is understandable that when the cross-section of the through hole 4a is circular, the cross-section of the vertical shaft 1 is a regular polygon or a circle, and the diameter of the through hole 4a is equal to the diameter of the circumcircle of the regular polygonal cross-section of the vertical shaft 1 or equal to the diameter of the circular cross-section of the vertical shaft 1; when the cross-section of the through hole 4a is a regular polygon or a circle, the cross-section of the vertical shaft 1 is circular, and the diameter of the circular cross-section of the vertical shaft 1 is equal to the diameter of the incircle of the regular polygonal cross-section of the through hole 4a or equal to the diameter of the circular cross-section of the through hole 4a.

[0032] It is understandable that the outer contour of the cross-section of the support member 3 and the outer contour of the cross-section of the sliding member 4 can both be circular, or one of the two components can be circular and the other can be a regular polygon. There is no limitation on this. When the first method is adopted, the number of support legs 5 can be any number not less than 3, such as 3, 4, or 5. When the second method is adopted, the number of support legs 5 is determined by the number of sides of the regular polygon.

[0033] like Figure 3As shown, the support member 3 has multiple second receiving grooves 32 evenly distributed around its outer periphery to accommodate the support legs 5. The number of second receiving grooves 32 is equal to the number of support legs 5. The second receiving grooves 32 are staggered with the first receiving grooves 31 (i.e., the second receiving grooves 32 are located on the protrusion between two adjacent first receiving grooves 31). When the support leg 5 is located in the second receiving groove 32 and the sliding member 4 slides to the lowest position of the vertical shaft 1, the horizontal distance from the bottom end of the support leg 5 to the central axis of the vertical shaft 1 is greater than the minimum radius of the inner hole 02 of the ladle nozzle seat brick 01 (i.e., the diameter of the circle where the bottom end of each support leg 5 is located is greater than the top surface diameter of the lower hole 021, so as to ensure that each support leg 5 can be pressed against the inner wall of the lower hole 021 and prevent the lifting device from coming out of the inner hole 021).

[0034] To reduce damage to the inner wall of the inner hole 02 of the ladle nozzle seat brick 01 by the support leg 5, a rubber head is provided at the bottom of the support leg 5.

[0035] like Figure 4 As shown, multiple double-ear seats 41 are evenly distributed around the outer periphery of the slider 4; the double-ear seat 41 includes two spaced connecting ears 411, and the two connecting ears 411 on the same double-ear seat 41 are connected by a horizontal rotating shaft 42; the top of the support leg 5 is rotatably mounted on the corresponding horizontal rotating shaft 42 through the horizontal rotating shaft 42, so as to realize the up and down flip of the support leg 5 relative to the slider 4.

[0036] It is understandable that the horizontal rotating shaft 42 is the bolt shank of the bolt. The bolt passes through the two connecting ears 41 on the same double-ear seat 4 in sequence and is connected to the nut so as to replace the deformed support leg 5.

[0037] The present invention also provides a method for hoisting a ladle nozzle seat brick, which uses the above-mentioned hoisting tool to hoist the ladle nozzle seat brick 01. The hoisting method includes the following steps:

[0038] The slider 4 is rotated around the central axis of the vertical shaft 1, so that each support leg 5 on the slider 4 is located in the corresponding first receiving groove 31;

[0039] Using the lifting device to hook the lifting ring 2, the lifting device is suspended in the air, and the sliding part 4 slides to the lowest position under the action of gravity; at this time, the horizontal distance from the bottom end of each support leg 5 to the central axis of the vertical shaft 1 is less than the diameter of the top surface of the lower hole 022 of the steel ladle water outlet seat brick 01.

[0040] Insert the lifting device into the inner hole 02 of the ladle nozzle seat brick 01 until the support leg 5 of the lifting device contacts the ground;

[0041] Continue to lower the lifting ring 2, so that the support 3 moves down until the support leg 5 is completely removed from the first receiving groove 31 on the support 3;

[0042] Rotate the lifting ring 2 to make the support member 3 rotate relative to the sliding member 4 until the support leg 5 is aligned with the second receiving groove 32 (i.e. the support leg 5 is offset from the first receiving groove 31); then move the lifting ring 2 up until the support leg 5 is located in the second receiving groove 32 and contacts the support member 3.

[0043] Continue to move the lifting ring 2 upwards, and the support leg 5 will flip upwards under the action of the support member 3 until each support leg 5 is pressed against the inner wall of the lower hole (022) of the steel ladle water outlet seat brick 01;

[0044] After the mobile lifting device lifts the ladle nozzle seat brick 01 to the designated position, the lifting ring 2 is lowered to lower the support 3 until the support leg 5 is completely removed from the second receiving groove 32 on the support 3.

[0045] Rotate the lifting ring 2 to make the support 3 rotate relative to the sliding member 4 until the support leg 5 is aligned with the first receiving groove 31 (i.e., the support leg 5 is offset from the second receiving groove 32); then move the lifting ring 2 up to pull the lifting device out of the inner hole 022, thus completing the lifting of the ladle nozzle seat brick 01.

[0046] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A lifting device for a steel ladle nozzle seat brick, characterized in that: The lifting device includes a vertical shaft (1), a lifting ring (2), a support member (3), and a sliding member (4). The vertical shaft (1), the support member (3), and the sliding member (4) are all centrally symmetrical structures. The lifting ring (2) is fixed to the top of the vertical shaft (1), and the support member (3) is coaxially fixed to the bottom of the vertical shaft (1). The sliding member (4) is coaxially slidably sleeved on the vertical shaft (1), and the sliding member (4) can rotate around the central axis of the vertical shaft (1). The sliding member (4) is located between the lifting ring (2) and the support member (3). Multiple vertically rotatable support legs (5) are evenly distributed around the outer periphery of the sliding member (4). (4) When sliding to the highest position, the bottom end of the support leg (5) is not higher than the position of the support member (3); the support member (3) has a plurality of first receiving grooves (31) that can accommodate the support leg (5) evenly distributed around its outer periphery, and the number of the first receiving grooves (31) is equal to the number of the support leg (5); when the support leg (5) is located in the corresponding first receiving groove (31) and the sliding member (4) slides to the lowest position, the horizontal distance from the bottom end of the support leg (5) to the central axis of the vertical shaft (1) is less than the minimum radius of the inner hole (02) of the steel ladle nozzle seat brick (01); when the support leg (5) exits the first receiving groove (31) and the sliding member (4) slides When the support leg (5) is at its lowest position, the horizontal distance from the bottom of the support leg (5) to the central axis of the vertical shaft (1) is greater than the minimum radius of the inner hole (02) of the ladle nozzle seat brick (01); the support member (3) has a plurality of second receiving grooves (32) evenly distributed around its outer circumference to accommodate the support leg (5), and the number of the second receiving grooves (32) is equal to the number of the support leg (5); the second receiving grooves (32) and the first receiving grooves (31) are staggered; when the support leg (5) is located in the second receiving groove (32) and the sliding member (4) slides to the lowest position, the horizontal distance from the bottom of the support leg (5) to the central axis of the vertical shaft (1) is greater than the ladle nozzle seat brick (01). The minimum radius of the inner hole (02); the bottom end of the support leg (5) is provided with a rubber head; the outer periphery of the sliding member (4) is evenly distributed with multiple double ear seats (41); the double ear seat (41) includes two spaced connecting ears (411), and the two connecting ears (411) on the same double ear seat (41) are connected by a horizontal rotating shaft (42); the top end of the support leg (5) is rotatably set on the corresponding horizontal rotating shaft (42) by a horizontal rotating shaft (42); the horizontal rotating shaft (42) is the bolt shank of the bolt, and the bolt passes through the two connecting ears (411) on the same double ear seat (41) in sequence and is connected to the nut.

2. The lifting device for a steel ladle nozzle seat brick according to claim 1, characterized in that, The supporting legs (5) are three in number.

3. A ladle nozzle block lifting method characterized by, The steel ladle nozzle seat brick (01) is lifted using the lifting device as described in any one of claims 1 to 2, and the lifting method includes the following steps: Rotate the slider (4) so ​​that each support leg (5) on the slider (4) is located in the corresponding first receiving groove (31); Use the lifting device to hook the lifting ring (2) to suspend the lifting device in the air; at this time, the sliding part (4) slides to the lowest position under the action of gravity; Insert the lifting device into the inner hole (02) of the steel ladle nozzle seat brick (01) until the support leg (5) of the lifting device contacts the ground; Continue to lower the lifting ring (2) so that the support (3) moves down until the support leg (5) completely exits the first receiving groove (31) on the support (3); Rotate the lifting ring (2) to make the support (3) rotate relative to the sliding member (4) until the first receiving groove (31) is misaligned with the support leg (5); then move the lifting ring (2) up until the support (3) contacts the support leg (5); Continue to move the lifting ring (2) upward, and the support leg (5) will flip upward under the action of the support member (3) until each support leg (5) is pressed against the inner wall of the inner hole (02) of the steel ladle water nozzle seat brick (01); The mobile lifting device was used to lift the steel ladle nozzle seat brick (01).

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