CN217701266U - Internal and external arc hydraulic vibration device for multi-strand slab continuous casting machine - Google Patents
Internal and external arc hydraulic vibration device for multi-strand slab continuous casting machine Download PDFInfo
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- CN217701266U CN217701266U CN202221317623.8U CN202221317623U CN217701266U CN 217701266 U CN217701266 U CN 217701266U CN 202221317623 U CN202221317623 U CN 202221317623U CN 217701266 U CN217701266 U CN 217701266U
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Abstract
The invention discloses an inner and outer arc hydraulic vibration device of a multi-flow slab continuous casting machine, which comprises a plurality of crystallizers arranged side by side, wherein hydraulic vibration units are respectively arranged on the two sides of the inner arc and the outer arc of each crystallizer, and the hydraulic vibration units are connected with the corresponding crystallizers; the hydraulic vibration unit is arranged on the adjacent concrete wall through the supporting frame. The invention saves space, has good equipment operation environment, long service life and low failure rate, and is convenient to maintain and overhaul.
Description
Technical Field
The invention relates to the technical field of metallurgical machinery, in particular to an inner and outer arc hydraulic vibration device of a multi-flow slab continuous casting machine.
Background
The slab casting is called slab casting with the width-thickness ratio of the casting slab being more than 3, and the slab continuous casting is a continuous casting technology taking the slab as a main product. The casting section size of the conventional slab caster is as follows: the thickness is 150-250 mm, and the width is 1000-1800 mm; the narrow plate blank has a width of 700mm or less and a thickness of about 120-150 mm. The continuous casting slab is mainly used for rolling flat plates (thick plates, middle plates, thin plates and strip coils).
As is well known, the conventional method for producing slabs is mainly to configure the flow number and the pulling speed of a casting machine according to the size of a ladle and the yield requirement of subsequent steel rolling, the casting machine is usually designed to be single-flow or double-flow, casting flow guide equipment between a crystallizer and an ingot stripping device is convenient to arrange, enough overhaul and maintenance space can be reserved, and a sector section transmission device is arranged outside two cooling chambers on two sides of the casting machine and is connected with a driving roller through a universal connecting shaft so as to ensure that a continuous casting machine stably and efficiently operates.
In recent years, along with the adjustment of environmental protection and national industrial policies, the capacity of a smelting furnace is required to be larger and shorter, a large number of hot continuous rolling units of 1000-1500 mm are built at home, the capacity of each production line is 250-350 ten thousand tons, the required slab width is centralized between 700-1300 mm, the produced steel types cover low carbon steel, medium carbon steel, high carbon steel and the like, the annual production capacity of a double-flow slab continuous casting machine for producing the section specification is about 200 ten thousand tons, a single-line matching mode of 'steel making, continuous casting and steel rolling' cannot be met, and a series of difficulties are brought to early-stage planning configuration design, actual production scheduling, continuous casting and hot conveying and the like.
After the capacity of a rolling mill limits the specification of a casting blank, two ideas are provided for solving the problem that the capacity of the furnace-machine matching and the traditional straight arc-shaped slab continuous casting machine is limited: one is that the number of casting machine streams is not increased, and the production pulling speed is improved; another is to change the caster design to increase the number of streams. For the traditional slab caster, the over-high pulling speed causes the unfavorable factors of equipment wear aggravation, the quality deterioration of the inner part and the outer part of the casting blank, the increase of the breakout risk and the like. And through innovating the structural form of the vibration device and the sector section transmission of the slab casting machine, the casting space can be greatly saved, and the development of a three-stream or more-stream slab casting machine becomes a new development direction.
The hydraulic vibration units arranged on two sides of the casting flow of the double-flow and above-plate continuous casting machine need flow spacing space larger than or equal to 5000mm, and each flow of vibration base is connected with a solid square steel bracket on a concrete wall of a second cooling chamber; in the multi-stream slab continuous casting, in order to shorten the length of a tundish as much as possible, the flow spacing needs to be limited and is usually controlled to be 4500-5000 mm, and concrete walls are not arranged on two sides of a middle casting flow to be used as supports of a vibration device; even if the vibration device is arranged on two sides when the flow distance is larger than 5000mm, a large number of vibration units are crowded in the middle of the casting flow, the installation and maintenance space is small, and the vibration units are soaked in the steam environment of the secondary cooling chamber for a long time, so that the service life is not ideal. Therefore, how to arrange the multi-strand slab continuous casting hydraulic vibration unit is particularly critical.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the internal and external arc hydraulic vibration device of the multi-flow slab continuous casting machine, aiming at the defects in the prior art, so that the space is saved, the equipment has good operation environment, long service life and low failure rate, and is convenient to maintain and overhaul.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a hydraulic vibration device for the inner arc and the outer arc of a multi-strand slab continuous casting machine comprises a plurality of crystallizers arranged side by side, wherein hydraulic vibration units are uniformly arranged on the two sides of the inner arc and the outer arc of each crystallizer, and the hydraulic vibration units are connected with the corresponding crystallizers; the hydraulic vibration unit is arranged on the adjacent concrete wall through the supporting frame.
According to the technical scheme, the left side and the right side of each crystallizer are respectively provided with the overhanging concrete walls, and the two ends of the supporting frame are respectively connected with the overhanging concrete walls on the two sides.
According to the technical scheme, the outer side of each hydraulic vibration unit is provided with a walkway, a middle platform is arranged between adjacent crystallizers, and the walkway is communicated with the middle platform.
According to the technical scheme, the hydraulic vibration unit is arranged far away from the narrow surface of the casting blank formed by the crystallizer, and the casting blank is not required to be soaked in the steam environment of the secondary cooling chamber for a long time.
The hydraulic vibration unit comprises a movable frame, a fixed frame and a hydraulic cylinder, one end of the hydraulic cylinder is connected with the fixed frame, the other end of the hydraulic cylinder is connected with the movable frame, and the movable frame is connected with the crystallizer.
According to the technical scheme, the outer arc hydraulic vibration device in the multi-flow slab continuous casting machine further comprises a plurality of groups of plate spring sets, the plurality of groups of plate spring sets are respectively arranged on two sides of the hydraulic cylinder, and two ends of each group of plate spring set are respectively fixed on the fixed frame support and the movable frame support.
According to the technical scheme, the number of the plate spring groups is three, two groups of the plate spring groups are arranged on the movable frame and located on two sides of the hydraulic cylinder, and the other group of the plate spring groups is arranged on the fixed frame and located on one side of the hydraulic cylinder.
According to the technical scheme, the cylinder body of the hydraulic cylinder is fixedly connected with the fixed frame through the connecting plate.
According to the technical scheme, the movable frame is positioned above the fixed frame.
According to the technical scheme, the hydraulic cylinder is connected with the movable frame through the ejector rod.
According to the technical scheme, a buffer spring is connected between the fixed frame and the movable frame.
According to the technical scheme, the outer side of the buffer spring is provided with the spring outer cover.
According to the technical scheme, the hydraulic cylinder is connected with the servo valve, the servo valve is connected with the controller, the hydraulic cylinder is provided with the displacement sensor, and the controller is connected with the displacement sensor.
According to the technical scheme, the hydraulic cylinder is arranged in the fixed frame, and cooling gas or liquid is filled in the fixed frame.
The invention has the following beneficial effects:
according to the invention, the slab hydraulic vibration unit is arranged in the direction of the inner arc and the outer arc through the supporting structure for the first time, and the inner arc and the outer arc are independently driven by the hydraulic cylinder, so that the casting space in the secondary cooling chamber is saved, the equipment has good operation environment, long service life and low failure rate, no hydraulic vibration unit is arranged between adjacent crystallizers, and enough maintenance space is reserved, so that the maintenance and the overhaul are convenient, the online inspection, the maintenance or the overhaul can be conveniently carried out even in the steel casting period, and the requirements of the multi-stream slab process layout are perfectly adapted.
Drawings
FIG. 1 is a plan view of an inner and outer arc hydraulic vibration apparatus in a multi-strand slab continuous caster in an embodiment of the present invention;
FIG. 2 is a cross-sectional view B-B of FIG. 1;
FIG. 3 is a view from the direction A of FIG. 2;
in the figure, 1-a middle tank car, 2-a middle tank, 3-a crystallizer, 4-a hydraulic vibration unit, 5-a support frame, 6-a bending section, 7-a concrete wall, 8-a fan-shaped section, 9-a fixed frame, 10-a servo control system, 11-a movable frame, 12-a mandril, 13-a plate spring group, 14-a hydraulic cylinder and 15-a buffer spring.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1 to 3, an outer arc hydraulic vibration device in a multi-strand slab casting machine according to an embodiment of the present invention includes a plurality of crystallizers 3 arranged side by side, wherein hydraulic vibration units 4 are disposed on both sides of an inner arc and an outer arc of each crystallizer 3, that is, the hydraulic vibration units are not disposed between adjacent crystallizers, and the hydraulic vibration units are connected to the corresponding crystallizers; the hydraulic vibration unit 4 is disposed on the adjacent concrete wall 7 through the support frame 5.
Furthermore, the left side and the right side of each crystallizer 3 are provided with overhanging concrete walls 7, and two ends of the support frame 5 are respectively connected with the overhanging concrete walls 7 on the two sides.
Further, the left and right sides of each crystallizer 3 all is equipped with the concrete wall 7 of encorbelmenting, promptly: the outer sides of the crystallizers 3 at the outermost sides are provided with overhanging concrete walls 7, and the overhanging concrete walls 7 are also arranged between every two adjacent crystallizers 3.
Furthermore, the hydraulic vibration unit 4 is arranged away from the casting blank narrow surface formed by the crystallizer 3, and does not need to be soaked in the steam environment of the secondary cooling chamber for a long time, so that the heat radiation of the side surface of the casting blank is avoided, the service life is long, and the failure rate is low.
Furthermore, a walkway is arranged at the outer side of each hydraulic vibration unit 4, a middle platform is arranged between the adjacent crystallizers 3, and the walkway is communicated with the middle platform; the on-line inspection, maintenance or overhaul can be conveniently carried out during steel casting, and the requirements of the multi-flow slab process layout are perfectly met.
The hydraulic vibration unit 4 comprises a movable frame 11, a fixed frame 9 and a hydraulic cylinder 14, one end of the hydraulic cylinder 14 is connected with the fixed frame 9, the other end of the hydraulic cylinder 14 is connected with the movable frame 11, and the movable frame 11 is connected with the crystallizer 3.
Further, the outer arc hydraulic vibration device in the multi-flow slab continuous casting machine further comprises a plurality of groups of plate spring groups 13, the plurality of groups of plate spring groups 13 are respectively arranged on two sides of the hydraulic cylinder 14, and two ends of each group of plate spring group 13 are respectively fixed on the fixed frame 9 support and the movable frame 11 support through pins and bolts.
Further, the leaf spring sets 13 are arranged in three groups, two groups are arranged on the movable frame 11 and located on two sides of the hydraulic cylinder 14, and the other group is arranged on the fixed frame 9 and located on one side of the hydraulic cylinder 14.
Furthermore, a tundish 2 is arranged above the crystallizer 3, the lower end of the crystallizer 3 is sequentially connected with a guide roller bending section and a guide roller fan-shaped section 8, and the tundish 2 is arranged on the tundish car 1.
Further, the cylinder body of the hydraulic cylinder 14 is connected and fixed with the fixed frame 9 through a connecting plate.
Further, the movable frame 11 is located above the fixed frame 9.
Further, the hydraulic cylinder 14 is connected with the movable frame 11 through a mandril 12, and the mandril 12 is fixedly connected with a piston rod of the hydraulic cylinder 14 through threads.
Further, a buffer spring 15 is connected between the fixed frame and the movable frame 11.
Further, a spring housing is provided outside the buffer spring 15.
Furthermore, the hydraulic cylinder 14 is connected with a servo valve, the servo valve is connected with a controller, a displacement sensor is arranged on the hydraulic cylinder 14, and the controller is connected with the displacement sensor.
Further, the hydraulic cylinder 14 is installed in a fixed frame filled with cooling gas or liquid and sealed well.
The working principle of the invention is as follows:
referring to fig. 2, liquid molten steel in a ladle flows into an intermediate tank 2 through a protective sleeve below the liquid molten steel for buffering and purification, and then is uniformly distributed to flow outlets of the intermediate tank 2, once a set pouring height in the intermediate tank 2 is reached, a stopper rod is opened, the molten steel is injected into a flow crystallizer 3 through a submerged nozzle, after the seedling raising time is reached, a fan-shaped section 8 transmission device performs blank drawing according to a set starting drawing speed, a vibration device 4, secondary cooling spray water and a secondary cooling pumping and discharging steam fan are simultaneously started, a casting blank with a liquid core is formed through primary cooling, is continuously bent through a bending section 6, then gradually moves downwards along an arc-shaped section 8, cooling water atomized by compressed air is directly sprayed onto the arc-shaped section for secondary cooling, the straightened casting blank reaches a horizontal fan-shaped section 8 and is drawn out by an ingot rod, the casting blank is separated from the ingot rod through an ingot stripping device, the casting blank is cut into a required fixed length through a flame cutter, and the production of a plate blank is completed.
The movable frame 11 of each hydraulic vibration unit 4 is positioned at the upper part of the fixed frame 9, the vibration driving device consists of a hydraulic cylinder 14 and an ejector rod 12, and the ejector rod is fixedly connected to a piston rod of the hydraulic cylinder 14 through threads; the hydraulic cylinder 14 is fixed on the fixed frame 9 through a lower connecting plate of the cylinder, and the ejector rod is connected on the movable frame through an upper connecting plate of the hydraulic cylinder 14; three groups of same plate spring groups 13 are respectively positioned on the upper surface of two sides and the lower surface of one side of the hydraulic vibration unit 4, and two ends of each group of plate spring groups 13 are respectively fixed on the fixed frame support and the movable frame support through pins and bolts; the buffer spring 15 is arranged between the fixed frame and the movable frame through a pressure plate, and the spring outer cover is positioned on the outer side of the buffer spring 15; the hydraulic servo control system 10 comprises a servo valve, a displacement sensor and a controller, wherein the displacement sensor is arranged on a piston rod of the hydraulic cylinder 14, and the servo valve controls the hydraulic cylinder 14 to move at different distances; the displacement sensor records an actual value of the generated position, and the controller performs position compensation by continuously comparing the actual value with a set value, the difference between the actual value and the set value. The inner arc hydraulic cylinder 14 and the outer arc hydraulic cylinder 14 have the same movement stroke, the three groups of plate springs 13 have the same angle, the equipment composition is simplified, non-sinusoidal vibration can be realized, the depth of vibration marks can be reduced, the surface quality of casting blanks is improved, and the occurrence of adhesive steel leakage accidents is obviously reduced.
Referring to fig. 1, the two hydraulic vibration units 4 are creatively arranged in an inner arc and an outer arc, and because the space between the multi-flow slab flows is limited, the space of a vibration support structure is limited, particularly, overhanging concrete walls 7 are arranged on two sides of the middle casting flow, and a support frame 5 is welded and fixed on the concrete walls 7, so that the stability and reliability are realized;
the cooling water inlet and return interfaces of the multi-flow slab crystallizer 3 are positioned on the inner arc side and the outer arc side, and cooling water required by the multi-flow slab crystallizer is directly communicated with a workshop pipeline through the support frame 5 and the vibration unit 4 interconnecting pipelines, so that the multi-flow slab crystallizer is convenient to replace.
Referring to fig. 3, two vibration units 4 of the vibration device are not arranged on the left side and the right side of a casting blank, so that the influence of heat radiation on the side surface of the casting blank on a hydraulic vibration driving device is avoided, the long-time vibration precision can be kept, and the online maintenance is convenient; the hydraulic cylinder 14 is arranged in the fixed frame and is well sealed, and the hydraulic cylinder is inflated and cooled to ensure that all components work well; the buffer spring 15 is used for balancing partial gravity of the crystallizer 3, the load of the hydraulic cylinder 14 is reduced, all loads of the 1 st to X-th flow vibration devices are transmitted to the concrete wall 7, and the device is safe and reliable and is a key point for realizing a three-flow slab casting machine.
In conclusion, in order to adapt to a small flow space and improve the working environment and the overhaul and maintenance performance of a vibration device, the invention creates an arrangement mode of a hydraulic vibration device of a multi-strand slab casting machine, fully considers the reasonable design of a civil engineering foundation, a support frame 5 and a vibration unit, arranges the hydraulic vibration unit 4 in the inner and outer arc directions through a support structure, saves the casting flow space in a secondary cooling chamber, adds a buffer spring 15 for partially offsetting the weight of a crystallizer, reduces the load of a hydraulic cylinder, finally transmits all the loads of the 1 st to X-th flow vibration devices to a concrete wall 7, is safe and reliable, solves the problem of stable support of the hydraulic vibration unit 4, and solves the problems that each vibration unit is far away from a narrow surface and does not need to be soaked in the steam environment of the secondary cooling chamber for a long time, thereby avoiding the heat radiation of the side surface of a casting blank, having long service life and low failure rate.
Because the drawing speed difference of different widths and different steel plate blanks is large, the vibration parameters and the vibration waveforms can be flexibly adjusted. The full-leaf spring hydraulic vibration device is a new technology which adopts the connection and the guide of a leaf spring and realizes the vibration of a crystallizer by utilizing the reciprocating motion of a hydraulic cylinder, has compact equipment structure, no joint abrasion, high guide precision, small occupied space and good maintainability, can realize the on-line adjustment of vibration parameters and non-sinusoidal vibration, is widely used for a slab caster, and is gradually popularized to the continuous casting market of square billets, special-shaped billets and large round billets in recent years.
The above is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereby, and therefore, the present invention is not limited by the scope of the claims.
Claims (8)
1. The hydraulic vibration device for the inner arc and the outer arc of the multi-strand slab continuous casting machine is characterized by comprising a plurality of crystallizers arranged side by side, wherein hydraulic vibration units are respectively arranged on the two sides of the inner arc and the outer arc of each crystallizer, and the hydraulic vibration units are connected with the corresponding crystallizers; the hydraulic vibration unit is arranged on the adjacent concrete wall through the supporting frame.
2. The apparatus of claim 1, wherein overhanging concrete walls are provided on both sides of each mold, and both ends of the support frame are connected to the overhanging concrete walls on both sides, respectively.
3. The apparatus of claim 1, wherein the hydraulic vibration unit is located away from the narrow face of the strand formed by the mold.
4. The apparatus of claim 1, wherein the outer arc hydraulic vibration device comprises a walkway outside each hydraulic vibration unit, and an intermediate platform between adjacent molds, the walkway communicating with the intermediate platform.
5. The apparatus according to claim 1, wherein the hydraulic vibration unit comprises a movable frame, a fixed frame, and a hydraulic cylinder, one end of the hydraulic cylinder is connected to the fixed frame, the other end of the hydraulic cylinder is connected to the movable frame, the movable frame is connected to the corresponding mold, and a buffer spring is connected between the fixed frame and the movable frame.
6. The multi-strand slab caster inner and outer arc hydraulic vibration device of claim 5, wherein the hydraulic vibration unit further comprises a plurality of sets of leaf spring sets, the sets of leaf spring sets are respectively disposed on both sides of the hydraulic cylinder, and both ends of each set of leaf spring set are respectively fixed on the fixed frame support and the movable frame support.
7. The multiple strand continuous slab caster inner and outer arc hydraulic vibration device of claim 5, wherein the number of leaf spring sets is three, two sets being disposed on the movable frame on both sides of the hydraulic cylinder, and the other set being disposed on the fixed frame on one side of the hydraulic cylinder.
8. The multiple strand continuous slab caster outer arc hydraulic vibration device of claim 5, wherein the hydraulic cylinder is mounted within a fixed frame that is filled with a cooling gas or liquid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221317623.8U CN217701266U (en) | 2022-05-27 | 2022-05-27 | Internal and external arc hydraulic vibration device for multi-strand slab continuous casting machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221317623.8U CN217701266U (en) | 2022-05-27 | 2022-05-27 | Internal and external arc hydraulic vibration device for multi-strand slab continuous casting machine |
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| CN217701266U true CN217701266U (en) | 2022-11-01 |
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| CN202221317623.8U Active CN217701266U (en) | 2022-05-27 | 2022-05-27 | Internal and external arc hydraulic vibration device for multi-strand slab continuous casting machine |
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- 2022-05-27 CN CN202221317623.8U patent/CN217701266U/en active Active
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