CN114799101A - Quick-change connector for continuous casting round billet and application thereof - Google Patents
Quick-change connector for continuous casting round billet and application thereof Download PDFInfo
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- CN114799101A CN114799101A CN202210485875.XA CN202210485875A CN114799101A CN 114799101 A CN114799101 A CN 114799101A CN 202210485875 A CN202210485875 A CN 202210485875A CN 114799101 A CN114799101 A CN 114799101A
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- continuous casting
- quick
- lacing wire
- round billet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/08—Accessories for starting the casting procedure
- B22D11/086—Means for connecting cast ingots of different sizes or compositions
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Abstract
The invention discloses a quick-change connector for a continuous casting round billet and application thereof, belonging to the technical field of molten steel smelting equipment. The quick-change connector for the continuous casting round billet comprises a lacing wire frame and a hook-shaped lacing wire, wherein the lacing wire is fixedly connected to the lacing wire frame in a hook-type manner; the lacing bar frame and the lacing bar are made of steel materials, the round billet connector is quickly placed in the liquid level of the round billet crystallizer when the tundish is in a replacement gap, the lacing bar plays a role of bearing up and down, and after the whole round billet connector is melted in molten steel and the molten steel is solidified in the crystallizer, molten steel casting blanks in tundish crystallizers in front of and behind the round billet connector form a whole, so that the end cutting of the round casting blanks is reduced. And the problem that the head cutting ratio of a casting blank is high in the molten steel continuous casting process in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of molten steel smelting equipment, in particular to a quick-change connector for a continuous casting round billet and application thereof.
Background
The advantages of the near-net-shape continuous casting billets of non-ferrous and ferrous metals in the aspects of production efficiency, yield, product quality, automation degree, energy conservation, emission reduction and the like are rapidly developed, and the continuous casting ratio becomes one of indexes for measuring the continuous casting technology level and the manufacturing capability of continuous casting equipment in various countries. The trend of heavy continuous casting light die casting of various countries is formed in a metallurgical large environment, the specific gravity of die casting research and application is small, and the design capability and system innovation are lacked. However, the continuous casting can not meet the special requirements of ultra-thick casting blanks in the fields of nuclear power, high-speed rail, military industry and the like, for example, ITER nuclear radiation shielding blocks, Tokamak cooling walls, nuclear power turbine rotors, aircraft carrier deck steel, high-temperature high-pressure container steel and high-rise building shockproof thick plate steel still depend on die casting with the characteristics of large forging ratio, large single weight and small lot diversity.
The molten steel tundish is important equipment on a continuous casting production line, molten steel is poured into the crystallizer by the tundish, the molten steel on the liquid level of the crystallizer can be rapidly cooled in a replacing gap of the conventional tundish in the replacing process to generate the crop blanks, the crop blanks can be generated once each time the molten steel is replaced, the more the crop blanks are, the more serious the waste is, in addition, the higher the crop blank and the crop tail occupation ratio of the casting blanks can also reduce the production efficiency, and the continuous casting processing cost is improved.
Through retrieval, Chinese patent publication No. CN 106180659A, publication No. 2016.12.07 discloses a combined water-cooled casting mold with directional solidification and zone selective cooling of a casting blank, forced cooling and directional solidification of the casting blank from bottom to top are realized, the excessive development of vertical mold walls and nondirectionally grown columnar crystals is avoided, so that the vertical chassis of the casting blank grows, the problems of central shrinkage porosity and V-shaped segregation are eliminated, a large single-heavy cast forging blank with refined crystal grains, uniform ultrasonic detection crystal grains and compact and uniform solidification tissues without defects is obtained, and the ultrasonic flaw detection qualification rate is improved; the upper half part of the casting mould body is of a hollow heat preservation structure, and a cooling water channel and a chassis of the lower half part of the casting mould body are water-cooled, so that different areas of the casting mould can be selectively cooled in a segmented manner, a one-dimensional temperature field and high cooling strength are established, most of sensible heat and latent heat of a casting blank are conducted from the chassis, and directional solidification is realized; the hot-feeding shrinkage head is used, and the molten glass layer, the heating agent layer and the covering layer are arranged in the hot-feeding shrinkage head, so that the shrinkage hole area is mainly concentrated on the hot-feeding shrinkage head part, the solid height in the hot-feeding shrinkage head is improved, and the ratio of crop blank head cutting and tail cutting is reduced. This patent requires the provision of a special mold with a complex structure, a high operating threshold and a limited applicability.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to solve the problem that the proportion of the crop ends of round billet casting blanks is high in the continuous casting process of molten steel in the prior art, and provides a quick-change connector for continuous casting round billets and application thereof.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention relates to a quick-change connector for a continuous casting round billet, which comprises a lacing wire frame and a hook-shaped lacing wire, wherein the lacing wire is fixedly connected to the lacing wire frame in a hook-type manner; the lacing bar frame and the lacing bar are made of steel materials generally, the tundish is arranged in a replacement gap, the round billet connecting piece is quickly placed in the liquid level of the round billet crystallizer, the initial pre-solidification state of molten steel in the crystallizer is fully utilized, the viscosity is certain, the whole connecting piece can float on the surface of the molten steel, the lacing bar plays a role in bearing up and down, and molten steel casting blanks in the tundish at the front and the rear of the round billet connecting piece are integrated after the molten steel is solidified in the crystallizer along with the melting of the whole round billet connecting piece in the molten steel, so that the end cutting of the round casting blank is reduced.
Furthermore, the lacing wire frame comprises an upper hanging ring and a lower hanging ring which are fixedly connected through a vertical connecting rod, so that the lacing wire can be conveniently fixed after being hung, the vertical connecting rod is generally made of round steel and has higher strength, and the inner sides of the upper hanging ring and the lower hanging ring are symmetrically or uniformly fixed and are generally fixed by welding; the lacing wires are uniformly or symmetrically fixed around the upper hanging ring in a hook-type manner, so that the aim of uniformly casting a blank after the lacing wires are solidified with molten steel is fulfilled, and the lacing wires are simple in structure and convenient to insert and install in the crystallizer.
Furthermore, the diameter of the upper hanging ring is larger than that of the lower hanging ring; the hook rod of the hook of the lacing wire droops to the lower hanging ring, the elastic effect of the lacing wire is fully utilized, and the lacing wire is conveniently inserted and then fixed on the inner wall of the crystallizer.
Furthermore, the inner side of the ring of the upper hanging ring is fixedly connected with a square upper hanging rack; the upper hanging frame is also fixedly connected with a hook-shaped lacing wire in a hook-hanging manner so as to increase hanging points of the lacing wire and further improve the integral consistency of uniform casting blanks after molten steel is solidified.
Furthermore, the inner side of the lower hanging ring is connected with a transverse connecting rod to increase the supporting strength of the lower hanging ring; the lacing wire comprises an inner hook rod at the inner side of the lacing wire frame and an outer hook rod at the outer side of the lacing wire frame, and the length of the outer hook rod is greater than that of the inner hook rod, so that the balance of the inner and outer solidification states of the continuous casting blank can be effectively ensured; the length of the inner hook rod is preferably consistent with that of the inner hook rod and the outer hook rod of the lacing wire on the upper hanging frame, so that the integral consistency of uniform casting blanks after molten steel is solidified is improved as much as possible.
Furthermore, a baffle is arranged between the upper hanging ring and the lower hanging ring, so that the function of reinforcing the lacing wire frame is achieved, the effect of buffering the impact force of molten steel is achieved, the lacing wire frame is preheated, and the integral consistency of casting blanks during tundish replacement is further improved; the fixed accessible bracing piece of baffle is fixed in the top of transverse connecting rod, and the one end of bracing piece is fixed in the bottom surface of baffle promptly, and the other end is fixed in on the transverse connecting rod, accessible welded fastening.
Furthermore, a preheating seam is arranged on the baffle in a penetrating mode, and a preheating hole is formed in the middle of the baffle, so that the molten steel buffering effect and the preheating effect on the lacing wire frame are further improved.
Furthermore, the preheating slots are uniformly or symmetrically distributed on the baffle plate so as to achieve the uniform preheating as much as possible.
When a tundish is replaced, a body of the continuous casting round billet quick-change coupler is inserted into a liquid level line of molten steel in a crystallizer so as to play a role in starting and stopping.
In a further application, the position of the baffle is higher than the liquid level line, so that the baffle has buffering and preheating effects.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) according to the quick-change connector for the continuous casting round billet, the round billet connector can be quickly placed at the liquid level of a round billet continuous casting crystallizer in the replacement gap of the tundish, the tie bars play a role in bearing up and down, and after the molten steel is solidified in the crystallizer, the molten steel casting blanks in the tundish at the front and the rear of the round billet connector form a whole, so that the head cutting of the round casting blanks is reduced; moreover, the structure is simple, and the insertion type installation in the crystallizer is convenient and quick;
(2) according to the quick-change connector for the continuous casting round billet, the suspension points of the tie bars can be increased by the upper hanging frame, the number of the tie bars is increased, and the integral consistency of uniform casting blanks after molten steel is solidified is further improved;
(3) according to the quick-change connector for the continuous casting round billet, the baffle plate between the upper hanging ring and the lower hanging ring is arranged, so that the function of reinforcing the lacing wire frame is achieved, the effect of buffering the impact force of molten steel is achieved, the lacing wire frame is preheated, and the better promotion effect is achieved on improving the integral consistency of a casting blank during tundish replacement.
Drawings
FIG. 1 is a perspective view of a continuous casting round billet quick-change coupling of the present invention;
FIG. 2 is a schematic top view of the quick-change coupler for continuous casting round billets according to the present invention;
FIG. 3 is a schematic top view of a quick-change coupling for continuous casting round billets according to embodiment 5;
fig. 4 is a schematic view of the use state of the quick-change coupling for the continuous casting round billet of the invention.
In the figure: 1. hanging a ring; 2. a lower suspension loop; 3. a vertical connecting rod; 4. an upper hanging rack; 5. stretching a rib; 6. a transverse connecting rod; 7. a baffle plate; 10. a continuous casting round billet quick change coupler body; 20. a tundish; 30. a crystallizer; 51. an inner hook rod; 52. an outer hook rod; 71. preheating a seam; 72. preheating holes; 100. a liquid level line.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Example 1
The quick-change connector for the continuous casting round billet comprises a lacing wire frame and a hook-shaped lacing wire 5, wherein the lacing wire frame can be of a frame structure, and the lacing wire 5 is fixedly connected to the lacing wire frame in a hook-type manner; the lacing wire frame and the lacing wire 5 are generally made of steel materials, the lacing wire 5 can be made of steel bars, of course, round steel can also be used, the lacing wire frame is generally made of round steel, and the supporting strength is high.
In the application of the quick-change coupler for the continuous casting round billet in the embodiment, in the replacement gap of the tundish 20, the quick-change coupler body 10 for the continuous casting round billet is inserted into the position of a liquid level line 100 of molten steel in the crystallizer 30, the initial pre-solidification state of the molten steel in the crystallizer is fully utilized, the quick-change coupler body has certain viscosity, and is equivalent to suspending on the liquid level of the round billet crystallizer 30, at the moment, the pull ribs 5 play a role of starting and stopping, and as the whole round billet coupler is melted in the molten steel, the molten steel in the crystallizer 30 before and after being solidified in the crystallizer 30 enables the molten steel casting blanks in the front of and behind the round billet coupler to form a whole, so that the end cutting of the round casting blank is reduced. Moreover, the whole continuous casting round billet quick-change connector is simple in structure and convenient and quick to insert and install in the crystallizer.
Example 2
The basic structure of the quick-change coupling for continuous casting round billets of the embodiment is the same as that of the embodiment 1, and the differences and improvements are that: as shown in fig. 1 and 2, the tie bar frame is a circular frame conforming to the shape of the round billet of the crystallizer 30, and comprises a circular upper hanging ring 1 and a circular lower hanging ring 2 which are fixedly connected through a vertical connecting rod 3, so that the tie bar 5 can be conveniently suspended and fixed, the vertical connecting rod 3 is generally made of round steel and has higher strength, and the inner sides of the upper hanging ring 1 and the lower hanging ring 2 are symmetrically or uniformly fixed and generally fixed by welding; the lacing wires 5 are uniformly or symmetrically fixed around the upper hanging ring 1 in a hook-type manner, the hanging density can be as large as possible, the spacing distance is about 5 times of the diameter of the lacing wires 5, the purpose of uniformly casting a blank after the casting is solidified with molten steel can be achieved, in addition, the structure is simple, and the insertion type installation in the crystallizer 30 is convenient. The diameter of the upper hanging ring 1 can be larger than that of the lower hanging ring 2; the hook rod of the tie bar 5 droops to the lower hanging ring 2, so that the elastic effect of the tie bar 5 is fully utilized, and the tie bar is conveniently inserted and fixed on the inner wall of the crystallizer 30.
Example 3
The basic structure of the quick-change coupling for continuous casting round billets of the embodiment is the same as that of the embodiment 2, and the differences and improvements are as follows: as shown in fig. 2, a square upper hanging frame 4 is fixedly connected to the inner side of the ring of the upper hanging ring 1; the upper hanging frame 4 is also fixedly connected with a hook-shaped lacing wire 5 in a hook-hanging manner so as to increase hanging points of the lacing wire 5 and further improve the integral consistency of uniform casting blanks after molten steel is solidified. The inner side of the lower suspension ring 2 is connected with a transverse connecting rod 6 which can be distributed in an X-shaped staggered manner so as to increase the supporting strength of the lower suspension ring 2; the tie bar 5 comprises an inner hook rod 51 at the inner side of the tie bar frame and an outer hook rod 52 at the outer side, the length of the outer hook rod 52 is larger than that of the inner hook rod 51, the outer hook rod is in a downward and outward inclined state, the floating state of the whole connecting piece can be adjusted, and the balance of the inner and outer solidification states of the continuous casting blank can be effectively ensured; the length of the inner hook rod 51 is preferably consistent with that of the inner hook rod and the outer hook rod of the lacing wire 5 on the upper hanging rack 4, so that the integral consistency of uniform casting blanks after molten steel is solidified can be improved as much as possible.
Example 4
The quick-change coupling for continuous casting round billets of the embodiment has the same basic structure as that of the embodiment 3, and is different and improved in that: as shown in fig. 3, a baffle 7 is arranged between the upper suspension loop 1 and the lower suspension loop 2 to play a role in reinforcing the lacing wire frame; the baffle 7 can be fixed above the transverse connecting rod 6 through the supporting rod, namely one end of the supporting rod is fixed on the bottom surface of the baffle 7, and the other end of the supporting rod is fixed on the transverse connecting rod 6 and can be fixed through welding. Of course, when the baffle 7 is circular, the diameter of the baffle is between the upper hanging ring 1 and the lower hanging ring 2, and the baffle can also be fixed on the inner wall of the vertical connecting rod 3 in a welding way.
In the application of the quick-change coupler for the continuous casting round billet in the embodiment, after the quick-change coupler body 10 for the continuous casting round billet is inserted into the liquid level line 100 of molten steel in the crystallizer 30, the position of the baffle 7 is higher than the liquid level line 100. When reinforcing the lacing wire frame, still play the unexpected technological effect of buffering molten steel impact force, and then preheat whole connector buffering formula, avoid its rapid melting, the holistic uniformity of casting blank when further improving the pouring basket and changing.
Example 5
The quick-change coupling for continuous casting round billets of the embodiment has the same basic structure as the embodiment 4, and is different and improved in that: the baffle 7 is provided with a preheating slot 71 in the upper hole and a preheating hole 72 in the middle part, so that the molten steel buffering effect and the preheating effect on the lacing wire frame are further improved.
The application of the quick-change coupler for the continuous casting round billet comprises the following specific steps:
step one, tundish replacement: in the continuous casting process of the billet, two tundishes 20 to be replaced before and after are assumed to be a tundish A and a tundish B, after molten steel of the tundish A is completely poured into a crystallizer 30, a liquid level line 100 is generated in the crystallizer 30, and the tundish B is quickly prepared for replacement:
step two, inserting the quick-change connector of the continuous casting round billet: in the gap between the tundish A and the tundish B which are quickly replaced, as shown in FIG. 4, the continuous casting round billet quick-change coupler body 10 is inserted at the liquid level line 100 of the molten steel in the crystallizer 30, and the lower half section of the continuous casting round billet quick-change coupler body 10 is immersed below the liquid level line 100 of the molten steel;
step three: molten steel casting: pouring the molten steel in the tundish B into the crystallizer 30 to submerge the upper half section of the continuous casting round billet quick-change coupler body 10;
step four: and (3) solidification: after the molten steel in the crystallizer 30 is solidified, the molten steel in the tundish A and the tundish B is continuously cast into a whole.
By repeating the steps, only one head and tail are cut off after the planned whole batch of round casting blanks are continuously cast, and when the preheating seams 71 are distributed on the baffle 7 uniformly or symmetrically as much as possible, the uniform preheating of the round blank connector body 10 by the molten steel can be achieved as much as possible, so that the consistency and the stability of the overall quality of the casting blanks during tundish replacement are improved.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (10)
1. The utility model provides a continuous casting circle base quick change coupler which characterized in that: comprises a lacing wire frame and a hook-shaped lacing wire (5), wherein the lacing wire (5) is fixedly connected on the lacing wire frame in a hook-type manner.
2. The continuous casting round billet quick-change coupling according to claim 1, characterized in that: the lacing wire frame comprises an upper hanging ring (1) and a lower hanging ring (2) which are fixedly connected through a vertical connecting rod (3); the lacing wire (5) is uniformly or symmetrically fixed around the upper hanging ring (1) in a hook-type manner.
3. The continuous casting round billet quick-change coupling according to claim 1, characterized in that: the diameter of the upper hanging ring (1) is larger than that of the lower hanging ring (2); and the hook rod of the hook of the lacing wire (5) droops to the lower hanging ring (2).
4. The continuous casting round billet quick-change coupling according to claim 1, characterized in that: the inner side of the upper hanging ring (1) is fixedly connected with a square upper hanging rack (4); the upper hanging rack (4) is also fixedly connected with a hook-shaped lacing wire (5) in a hook-type manner.
5. The continuous casting round billet quick-change coupling according to claim 1, characterized in that: the inner side of the lower hanging ring (2) is connected with a transverse connecting rod (6); the lacing wire (5) comprises an inner hook rod (51) at the inner side of the lacing wire frame and an outer hook rod (52) at the outer side of the lacing wire frame, and the length of the outer hook rod (52) is larger than that of the inner hook rod (51).
6. The quick-change coupling for continuous casting round billets as claimed in any one of claims 1 to 5, characterized in that: a baffle (7) is arranged between the upper hanging ring (1) and the lower hanging ring (2) and is fixed above the transverse connecting rod (6).
7. The continuous casting round billet quick-change coupling according to claim 6, characterized in that: the baffle (7) is provided with a preheating slit (71) in a penetrating way, and the middle part is provided with a preheating hole (72).
8. The continuous casting round billet quick-change coupling according to claim 7, characterized in that: the preheating slits (71) are uniformly or symmetrically distributed on the baffle (7).
9. The application of the quick-change coupler for the continuous casting round billet is characterized in that: the quick-change coupling body (10) for continuous casting round billets of one of claims 1 to 8 is inserted at the level line (100) of the molten steel in the mold (30) when the tundish (20) is replaced.
10. Use of a quick-change coupling for continuous casting round billets as claimed in claim 9, characterised in that: the baffle (7) is positioned higher than the liquid level line (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210485875.XA CN114799101A (en) | 2022-05-06 | 2022-05-06 | Quick-change connector for continuous casting round billet and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210485875.XA CN114799101A (en) | 2022-05-06 | 2022-05-06 | Quick-change connector for continuous casting round billet and application thereof |
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| Publication Number | Publication Date |
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| CN114799101A true CN114799101A (en) | 2022-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210485875.XA Pending CN114799101A (en) | 2022-05-06 | 2022-05-06 | Quick-change connector for continuous casting round billet and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115283656A (en) * | 2022-08-03 | 2022-11-04 | 马鞍山钢铁股份有限公司 | Quick-change connecting piece for tundish of round billet continuous casting machine |
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2022
- 2022-05-06 CN CN202210485875.XA patent/CN114799101A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115283656A (en) * | 2022-08-03 | 2022-11-04 | 马鞍山钢铁股份有限公司 | Quick-change connecting piece for tundish of round billet continuous casting machine |
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