CN210305740U - Accurate ladle turret of centering location - Google Patents
Accurate ladle turret of centering location Download PDFInfo
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- CN210305740U CN210305740U CN201920976943.6U CN201920976943U CN210305740U CN 210305740 U CN210305740 U CN 210305740U CN 201920976943 U CN201920976943 U CN 201920976943U CN 210305740 U CN210305740 U CN 210305740U
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Abstract
The utility model discloses a centering fixes a position accurate ladle turret belongs to the steelmaking device field. The ladle turret spiral arm is provided with an accurate centering area on the upper surface; the left positioning plate and the right positioning plate are fixedly connected with the right end of the accurate middle centering area; and the front and rear positioning mechanisms are composed of a front positioning plate which is upwards fixedly connected to the front end of the accurate middle area and a rear positioning plate which is upwards fixedly connected to the rear end of the accurate middle area. The utility model discloses a control positioning mechanism and front and back positioning mechanism and cooperate for the ladle is placed at every turn, and the homoenergetic is accurate to be located accurate centering district, has guaranteed that the molten steel can accurate flow in the middle of the package impact zone is positive, has optimized well package molten steel flow field, and the package sediment of wrapping in the reduction improves the ability that the package purified the molten steel in the middle of, has simple structure, reasonable in design, easily manufacturing's advantage.
Description
Technical Field
The utility model belongs to steelmaking device field, more specifically say, relate to a accurate ladle turret of centering location.
Background
The ladle turret is the most common equipment for carrying and supporting a ladle to pour in modern continuous casting, and a long ladle nozzle is required to be accurately centered during continuous casting, so that a steel flow accurately flows into the middle of a tundish impact area or the middle of a flow stabilizer to ensure the quality of a continuous casting product. Therefore, the ladle turret must have an accurate positioning function.
The prior ladle turret and tundish car can basically meet the requirements through accurate limit control and dimensional precision control, but have certain problems in realizing accurate centering of a long nozzle in actual production. The ladle that the package revolving platform accepts the ladle under the prior art is sat and is considered reducing the collision when placing the ladle, conveniently accepts the molten steel, and not tight thread seaming between package seat and the ladle to the distance is great, when leading to different heats ladle position of falling, the position of ladle can't be fixed, and then leads to long mouth of a river position not fixed yet, even accomplish accurate limit control and size accuracy control, also can't further improve the poor problem of centering effect at long mouth of a river.
Through retrieval, the Chinese patent publication number: CN204038897U, published: 24/12/2014, a guiding and positioning device for dropping a steel ladle is disclosed, which comprises: the ladle trunnion seat is arranged on the side surface of the ladle; the high-level guide component is arranged on the frame and used for enabling the trunnion seat of the steel ladle to be horizontally leaned in the falling process; the low-position guide component is arranged on the frame and is opposite to the high-position guide component; and the support bridge seat is positioned between the high-position guide component and the low-position guide component to support the falling trunnion seat, wherein the top end of the low-position guide component is lower than the top end of the high-position guide component. Although the device can accurately position the steel ladle at the left position and the right position, the front position and the rear position cannot be accurately positioned, the volume of the steel ladle can be changed when molten steel is borne in the steel ladle, the amplitude of volume change is different along with different using times of the steel ladle, and the steel ladle after the volume change cannot be stably placed into the device.
SUMMERY OF THE UTILITY MODEL
1. Problems to be solved
When placing the ladle revolving platform to current ladle, the poor problem of centering location effect, the utility model provides a ladle revolving platform of centering location accuracy cooperatees through controlling positioning mechanism and front and back positioning mechanism for the ladle is placed at every turn, and homoenergetic accuracy is located in accurate centering district, has guaranteed that the molten steel can accurately flow into in the middle of the middle package impact zone is positive.
2. Technical scheme
In order to solve the above problems, the utility model adopts the following technical proposal.
A ladle turret with accurate centering and positioning, which comprises,
the upper surface of the rotary arm of the ladle turret is provided with an accurate centering area;
further comprising:
the left positioning mechanism and the right positioning mechanism are respectively composed of a left positioning plate which is upwards fixedly connected with the left end of the accurate middle centering area and a right positioning plate which is upwards fixedly connected with the right end of the accurate middle centering area;
and the front and rear positioning mechanisms are composed of a front positioning plate which is upwards fixedly connected to the front end of the accurate middle area and a rear positioning plate which is upwards fixedly connected to the rear end of the accurate middle area.
When the ladle is placed, the left positioning mechanism and the right positioning mechanism limit the transverse position of the ladle, the front positioning mechanism and the rear positioning mechanism limit the vertical position of the ladle, and the left positioning mechanism and the right positioning mechanism are matched with each other, so that the ladle can be accurately placed on an accurate centering area after being placed on a spiral arm of a ladle turret, the molten steel can accurately flow into the middle of a tundish impact area, and the quality of a continuous casting product is guaranteed.
Further, the distance between the bottom parts of the inner sides of the left positioning plate and the right positioning plate is 1.25-1.40% of the length L of the trunnion base of the ladle; the distance between the front positioning plate and the bottom of the inner side of the rear positioning plate is 1.30-1.36% of the distance D between the bases of the two trunnions of the ladle. The accurate middle area is an ideal area when the steel ladle is placed at normal temperature, and the steel ladle rotary table work at high temperature in the actual use process, so that the thermal expansion coefficient of the steel ladle is combined, the steel ladle with low age has good thermal insulation performance, low thermal expansion, poor thermal insulation performance and large thermal expansion, the distance between the left positioning mechanism and the right positioning mechanism and the front positioning mechanism and the distance between the left positioning mechanism and the rear positioning mechanism are further optimized to avoid the situation that the high-temperature steel ladle cannot be normally placed in the accurate middle area.
Furthermore, the left and right positioning mechanisms are of a closing type, and the horizontal distance between the top of the inner sides of the left positioning plate and the right positioning plate is 1.02-1.06 times that between the bottom of the left positioning plate and the right positioning plate; front and back positioning mechanism is the mouth of a knife, front locating plate and back locating plate inboard top horizontal spacing are 1.15 ~ 1.25 times of bottom horizontal spacing. In order to avoid violent collision between the steel ladle and the left and right positioning mechanisms and the front and rear positioning mechanisms when the steel ladle is placed, the left and right positioning mechanisms and the front and rear positioning mechanisms are both set to be closed type, when the steel ladle is used on site, the upper limit value is taken for a small-size steel ladle, and the lower limit value is taken for a large-size steel ladle; the difference of top interval and bottom interval is big more, and the inboard slope degree of locating plate is big more, though can follow bigger within range and lead to, but along with the increase of ladle size, the load greatly increased that receives on the inboard inclined plane of locating plate produces irreversible destruction to positioning mechanism easily, and the mechanism itself of hoist and mount ladle has certain accurate transportation and places the ability, sets up too big slope degree and is unnecessary.
Further, still include buffer gear, it includes:
the bearing plate is horizontally arranged above the accurate centering area;
and one end of the disc spring is fixedly connected with the upper surface of the spiral arm of the steel ladle revolving platform at the accurate middle area, and the other end of the disc spring is fixedly connected with the bottom of the bearing plate.
The bearing plate is of a plate-shaped structure, the shape and the size of the bearing plate are matched with those of the accurate middle area, the steel ladle is placed and then directly contacted with the bearing plate, the disc spring is positioned between the bearing plate and the spiral arm of the steel ladle revolving platform, and the impact force generated after the steel ladle is placed is transmitted to the steel ladle revolving platform after being partially absorbed by the disc spring in a buffering way, so that the impact force applied to the steel ladle revolving platform is greatly reduced.
3. Advantageous effects
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses a ladle turret that centering location is accurate, through the left and right positioning mechanism with front and back positioning mechanism cooperate, make the ladle place each time, all can accurately be located in accurate centering district, guaranteed that the molten steel can accurately flow into the middle of the impact zone of tundish, optimized the middle package molten steel flow field, reduced the middle package and rolled up the sediment, improved the ability that the middle package purified the molten steel;
(2) the utility model discloses a ladle revolving platform that centering location is accurate, through to the left and right positioning mechanism and front and back positioning mechanism inboard bottom interval according to ladle thermal expansion coefficient adaptability setting, get the upper limit value to the ladle of packet age height, the ladle of packet age low gets the lower limit value, has guaranteed the ladle and has fallen the accuracy of package position in front and back left and right sides, and the ladle can still accurately put into accurate centering district under high temperature;
(3) the utility model discloses a ladle turret that the centering location is accurate, all establish left and right positioning mechanism and front and back positioning mechanism as the finish off formula, play the guide effect to it when placing the ladle, avoid the ladle to take place violent collision with left and right positioning mechanism and front and back positioning mechanism when placing, guarantee that it falls into accurate centering district smoothly;
(4) the utility model discloses a ladle turret that centering location is accurate is equipped with buffer gear, and the impact force after the ladle is placed transmits to the ladle turret after the dish spring buffering absorbs partly, greatly reduces the impact force that the ladle turret received, has prolonged the effective life of ladle turret, and buffer gear still can make the ladle place, and the fluctuation of inside molten steel reduces, helps improving the continuous casting product quality;
(5) the utility model discloses simple structure, reasonable in design easily makes.
Drawings
FIG. 1 is a front view of a radial arm of a ladle turret in the prior art;
FIG. 2 is a front view of the ladle turret radial arm with accurate centering and positioning in the present embodiment;
FIG. 3 is a left side view of the ladle turret radial arm with accurate centering and positioning in the present embodiment;
FIG. 4 is a front view of the swing arm of the ladle turret with a ladle in accordance with the present embodiment;
FIG. 5 is a left side view of the swing arm of the ladle turret with a ladle in accordance with the present embodiment;
FIG. 6 is a top view of the swing arm of the ladle turret with a ladle in accordance with the present embodiment;
FIG. 7 is a top view of the ladle turret radial arm with accurate centering and positioning in the present embodiment;
FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7;
FIG. 9 is an enlarged view of C in FIG. 8;
FIG. 10 is a left side view of the ladle;
fig. 11 is a front view of a ladle.
In the figure: 1. a steel ladle rotary table spiral arm; 10. accurately centering the middle area; 2. a left and right positioning mechanism; 20. a left positioning plate; 21. a right positioning plate; 3. a front and rear positioning mechanism; 30. a front positioning plate; 31. a rear positioning plate; 4. a buffer mechanism; 40. a carrier plate; 41. a disc spring; 5. a ladle; 50. a trunnion base; 51. a trunnion.
Detailed Description
The invention will be further described with reference to specific embodiments and drawings.
Example 1
A ladle turret with accurate centering and positioning, as shown in fig. 2 and 3, includes,
the upper surface of the ladle turret spiral arm 1 is provided with an accurate centering area 10;
further comprising:
the left and right positioning mechanism 2 consists of a left positioning plate 20 which is upwards fixedly connected with the left end of the accurate middle centering area 10 and a right positioning plate 21 which is upwards fixedly connected with the right end of the accurate middle centering area 10;
and the front and rear positioning mechanism 3 consists of a front positioning plate 30 which is upwards fixedly connected to the front end of the accurate centering area 10 and a rear positioning plate 31 which is upwards fixedly connected to the rear end of the accurate centering area 10.
In the prior art, the spiral arm structure of the ladle turret is shown in figure 1, when in continuous casting, a ladle 5 needs to be placed at a specific position of the spiral arm 1 of the ladle turret so that a long nozzle of the ladle 5 can be centered and a steel stream can accurately flow into the middle of a tundish impact area or the middle of a flow stabilizer, under an ideal condition, a position area of the ladle 5 placed on the spiral arm 1 of the ladle turret is called as an accurate centering area 10 when the long nozzle of the ladle 5 is accurately centered, baffles are arranged at the front, the rear, the left and the right of the accurate centering area 10 in the embodiment, as shown in figure 6, when the ladle 5 is placed, the left and the right positioning mechanisms 2 limit the transverse position of the ladle 5, the front and the rear positioning mechanisms 3 limit the vertical position of the ladle 5, the left and the right positioning mechanisms 2 are matched with the front and the rear positioning mechanisms 3, so that the ladle 5 can be accurately placed on the accurate centering area 10, as shown in fig. 4, 5 and 6.
The ladle turret with accurate centering and positioning in the embodiment is matched with the front and rear positioning mechanisms 3 through the left and right positioning mechanisms 2, so that a ladle 5 can be accurately positioned in the accurate centering area 10 every time the ladle is placed, molten steel can accurately flow into the middle of the impact area of the tundish, the flow field of the molten steel of the tundish is optimized, the slag entrapment of the tundish is reduced, and the molten steel purifying capacity of the tundish is improved.
Example 2
The ladle turret with accurate centering and positioning in the embodiment is further improved on the basis of the embodiment 1, and the distance between the bottom parts of the inner sides of the left positioning plate 20 and the right positioning plate 21 is 1.25 to 1.40 percent of the length L of the trunnion base 50 of the ladle 5; the distance between the front positioning plate 30 and the bottom of the inner side of the rear positioning plate 31 is 1.30-1.36% of the distance D between the bases 50 of the two trunnions of the ladle 5.
In the production and use, the phenomenon of thermal expansion is found after the ladle 5 bears high-temperature molten steel, if the distance between the front positioning plate and the rear positioning plate and the distance between the left positioning plate and the right positioning plate are completely set to be matched with the size of the trunnion base 50 of the ladle 5, the ladle 5 after thermal expansion is difficult to put into the accurate centering area 10, the trunnion base 50 interferes with the left positioning mechanism, the right positioning mechanism 2 and the front positioning mechanism and the rear positioning mechanism 3, when the ladle 5 bears the molten steel, the thermal expansion coefficients of the ladle 5 and a ladle turret are tested and analyzed, and the length L of the trunnion base 50 is 1.25 times of the initial value and the distance D between the two trunnion bases 50 is 1.30 times of the initial value when the newly produced ladle 5 bears the molten; when the ladle 5 which is about to reach the service life bears molten steel and thermally expands, the length L of the trunnion base 50 is 1.40 times of the initial value, the distance D between the two trunnion bases 50 is 1.36 times of the initial value, and the rule that the heat preservation effect of the ladle 5 gradually becomes worse along with the increase of the service time is combined:
when the left and right positioning mechanisms 2 are arranged in the embodiment, the distance between the left positioning plate 20 and the bottom of the inner side of the right positioning plate 21 is 1.25-1.40% of the length L of the trunnion base 50 of the ladle 5, wherein the lower limit value is taken when the on-site used ladle 5 has a good heat preservation effect (namely, when the ladle 5 is short), and the upper limit value is taken when the ladle 5 has a poor heat preservation effect (namely, when the ladle 5 is long); similarly, when the front and rear positioning mechanisms 3 are provided in the present embodiment, the distance between the front positioning plate 30 and the bottom of the inner side of the rear positioning plate 31 is 1.30% -1.36% of the distance D between the bases 50 of the two trunnions of the ladle 5, wherein the lower limit value is set when the heat preservation effect of the ladle 5 used on site is good (i.e. the ladle age of the ladle 5 is low), and the upper limit value is set when the heat preservation effect of the ladle 5 used on site is poor (i.e. the ladle age of the ladle 5 is.
According to the ladle turret with accurate centering and positioning, the distance between the inner sides and the bottoms of the left positioning mechanism 2, the right positioning mechanism 2 and the front positioning mechanism and the rear positioning mechanism 3 is adaptively set according to the thermal expansion coefficient of the ladle 5, the upper limit value is taken for the ladle 5 with a high ladle age, the lower limit value is taken for the ladle 5 with a low ladle age, the accuracy of the ladle 5 falling position in the front-rear left-right direction is ensured, and the ladle 5 can still be accurately placed into an accurate centering area at high temperature.
Example 3
The ladle turret with accurate centering and positioning is further improved on the basis of embodiment 1 or 2, the left and right positioning mechanisms 2 are closed, and the horizontal distance between the top parts of the inner sides of the left positioning plate 20 and the right positioning plate 21 is 1.02-1.06 times that between the top parts of the inner sides of the left positioning plate and the right positioning plate; front and back positioning mechanism 3 is the mouth of a knife, front locating plate 30 and back locating plate 31 inboard top horizontal spacing is 1.15 ~ 1.25 times of bottom horizontal spacing.
In order to avoid violent collision between the steel ladle 5 and the left and right positioning mechanisms 2 and the front and rear positioning mechanisms 3 when the steel ladle 5 is placed, the left and right positioning mechanisms 2 and the front and rear positioning mechanisms 3 are set to be in a closed type, when the steel ladle 5 is placed, the closed inner side structure can play a role in guiding the steel ladle 5, so that the steel ladle 5 is smoothly placed into the accurate centering area 10, wherein the horizontal distance between the tops of the inner sides of the left positioning plate 20 and the right positioning plate 21 is 1.02-1.06 times of the horizontal distance between the bottoms of the inner sides, when the steel ladle is used on site, the upper limit value of a small-size steel ladle; similarly, the horizontal distance between the front positioning plate 30 and the top of the inner side of the rear positioning plate 31 is 1.15-1.25 times of the horizontal distance between the bottom of the front positioning plate and the top of the inner side of the rear positioning plate, the upper limit value of a small-size steel ladle is taken, and the lower limit value of a large-size steel ladle is taken; the difference of top interval and bottom interval is big more, and the inboard slope degree of locating plate is big more, though can follow bigger within range and lead to, but along with the increase of 5 sizes of ladle, the load greatly increased who receives on the inboard inclined plane of locating plate produces irreversible destruction to positioning mechanism easily, and the mechanism itself of hoist and mount ladle 5 has certain accurate transportation ability of placing, sets up too big slope degree and is unnecessary.
When the small-size ladle 5 is continuously cast, the horizontal distance between the top parts of the inner sides of the left positioning plate 20 and the right positioning plate 21 is 1.06 times of the horizontal distance between the bottom parts, and the horizontal distance between the top parts of the inner sides of the front positioning plate 30 and the rear positioning plate 31 is 1.25 times of the horizontal distance between the bottom parts, so that the small-size ladle 5 can be easily placed in the accurate middle centering area 10, and the positioning plates are not damaged after long-term use;
when the large-size ladle 5 is continuously cast, the horizontal distance between the top of the inner sides of the left positioning plate 20 and the right positioning plate 21 is 1.02 times of the horizontal distance between the bottom of the inner sides of the front positioning plate 30 and the rear positioning plate 31, and the horizontal distance between the top of the inner sides of the front positioning plate 30 and the rear positioning plate 31 is 1.15 times of the horizontal distance between the bottom of the inner sides of the front positioning plate and the rear positioning plate, so that the large-size ladle 5 can be basically ensured to be.
Example 4
The ladle turret with accurate centering and positioning in the embodiment is further improved on the basis of the embodiment 1, 2 or 3, as shown in fig. 7, 8 and 9, and further comprises a buffer mechanism 4, which comprises:
a carrier plate 40 horizontally disposed above the exactly centered area 10;
one end of the disc spring 41 is fixedly connected with the upper surface of the ladle turret spiral arm 1 accurately aligned to the middle area 10, and the other end is fixedly connected with the bottom of the bearing plate 40.
Because the ladle 5 that bears molten steel is placed, is removed and is all hung trunnion 51 by the hoist and accomplish, can produce great impact when placing ladle 5, this kind of impact can make each spare part of ladle turret bear dynamic load, and long-term load effect can lead to the unable steady rotation of ladle turret, location, and consequently the improvement is made to this embodiment:
bearing plate 40 is platelike structure, its shape size and the accurate size phase-match to the zhongzhong district, behind ladle 5 places, with bearing plate 40 direct contact, dish spring 41 is located between bearing plate 40 and the ladle turret spiral arm 1, the impact force behind ladle 5 places transmits the ladle turret again after the dish spring 41 buffering absorbs partly, the impact force that the ladle turret that significantly reduces received, the effective life of ladle turret has been prolonged, and buffer gear 4 still can make ladle 5 place the time, the fluctuation of inside molten steel reduces, help improving the continuous casting product quality.
The disc spring 41 is selected for buffering in the embodiment because the disc spring has large load, small stroke and small occupied space, can bear great load in a small space, has strong buffering and vibration absorbing capacity and is very suitable for the structure of the device.
Example 5
The ladle turret with accurate centering and positioning in the embodiment is applied to a 110-ton five-strand round billet continuous casting machine, the length L of a single trunnion base 50 of the used ladle 5 is 1200mm, the horizontal distance D between the left edge and the right edge of the trunnion base 50 at two sides of the ladle 5 is 4100mm, and the structure of the ladle 5 is shown in fig. 10 and 11.
According to the spacing of ladle car and ladle turret and the well packet size during the casting, determine the position of the long mouth of a river during the casting, confirm ladle 5 when making the long mouth of a river of a ladle centering is accurate 10 positions to the middle district according to the position of trunnion base 50, ladle mouth of a river and the position of the long mouth of a river during the casting again.
According to the determined position of the accurate centering area 10, a front-back positioning mechanism 3 and a left-right positioning mechanism 2 are respectively arranged at the front, back and left and right of the spiral arm 1 of the ladle turret, wherein the distance between the bottoms of the inner sides of the front and back positioning plates is 1204mm, and the distance between the tops of the inner sides of the front and back positioning plates is 1440; the distance between the bottoms of the inner sides of the left positioning plate and the right positioning plate is 4114mm, and the distance between the tops of the inner sides of the left positioning plate and the right positioning plate is 4280 mm.
The positioning mechanism is of a closed structure, and the manufactured positioning bracket is made of steel with the same structure as the rotating arm of the ladle turret.
After the method is used, the falling position of each furnace ladle 5 is determined, and the accurate limit control and size control are matched, so that the long nozzle of each furnace ladle 5 can be accurately centered, the flow field of the tundish in the casting process is stable, and the metallurgical effect of the tundish is optimized.
The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.
Claims (6)
1. A ladle turret with accurate centering and positioning, which comprises,
the upper surface of the ladle turret spiral arm (1) is provided with an accurate centering area (10);
it is characterized by also comprising:
the left and right positioning mechanisms (2) are composed of a left positioning plate (20) which is upwards fixedly connected to the left end of the accurate centering area (10) and a right positioning plate (21) which is upwards fixedly connected to the right end of the accurate centering area (10);
and the front and rear positioning mechanism (3) consists of a front positioning plate (30) which is upwards fixedly connected to the front end of the accurate centering area (10) and a rear positioning plate (31) which is upwards fixedly connected to the rear end of the accurate centering area (10).
2. The ladle turret with accurate centering and positioning as claimed in claim 1, wherein: the distance between the inner bottom of the left positioning plate (20) and the inner bottom of the right positioning plate (21) is 1.25 to 1.40 percent of the length L of the trunnion base (50) of the ladle (5).
3. A centering and accurate ladle turret according to any of claims 1 or 2, wherein: the distance between the front positioning plate (30) and the bottom of the inner side of the rear positioning plate (31) is 1.30-1.36% of the distance D between the two trunnion bases (50) of the ladle (5).
4. The ladle turret with accurate centering and positioning as claimed in claim 2, wherein: left and right positioning mechanism (2) are the mouth of a narrowing formula, left side locating plate (20) and right locating plate (21) inboard top horizontal spacing is the bottom horizontal spacing 1.02 ~ 1.06 times.
5. The ladle turret with accurate centering and positioning as claimed in claim 3, wherein: front and back positioning mechanism (3) are the mouth of a narrowing formula, front locating plate (30) and back locating plate (31) inboard top horizontal spacing is bottom horizontal spacing's 1.15 ~ 1.25 times.
6. A centering and accurate ladle turret according to claim 1, further comprising a buffer mechanism (4) comprising:
a carrier plate (40) horizontally disposed above the central region (10);
one end of the disc spring (41) is fixedly connected with the upper surface of the ladle turret spiral arm (1) at the position accurately opposite to the middle area (10), and the other end of the disc spring is fixedly connected with the bottom of the bearing plate (40).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112317732A (en) * | 2020-09-08 | 2021-02-05 | 广东韶钢松山股份有限公司 | Tilting prevention device and method for molten steel tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112317732A (en) * | 2020-09-08 | 2021-02-05 | 广东韶钢松山股份有限公司 | Tilting prevention device and method for molten steel tank |
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