CN115229141A - Clamping control method and clamping device for crystallizer and continuous casting equipment - Google Patents
Clamping control method and clamping device for crystallizer and continuous casting equipment Download PDFInfo
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- CN115229141A CN115229141A CN202210743424.1A CN202210743424A CN115229141A CN 115229141 A CN115229141 A CN 115229141A CN 202210743424 A CN202210743424 A CN 202210743424A CN 115229141 A CN115229141 A CN 115229141A
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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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/05—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds into moulds having adjustable walls
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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
- B22D11/16—Controlling or regulating processes or operations
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Abstract
The invention relates to a clamping control method and a clamping device of a crystallizer and continuous casting equipment. The clamping control method of the crystallizer comprises the following steps: obtaining the width between two narrow-side copper plates of the crystallizer; determining the static pressure of liquid in the crystallizer on the wide-edge copper plate according to the width between the two narrow-edge copper plates of the crystallizer; determining the value of the soft clamping force of the clamping device, which needs to act on the wide-edge copper plate, according to the static pressure born by the wide-edge copper plate; and controlling the force of the clamping device on the broadside copper plate to the determined value of the soft clamping force. According to the clamping control method of the crystallizer, the value of the static pressure applied to the wide-side copper plate is closer to the actual value, so that the acting force of the clamping device on the wide-side copper plate is more accurate, the deviation is improved and reduced, the soft clamping state of the wide-side copper plate is avoided from being tighter, the friction and the abrasion between the narrow-side copper plate and the wide-side copper plate in the moving process of the narrow-side copper plate are improved, the steel passing amount of the wide-side copper plate and the narrow-side copper plate is increased, and the service life of the wide-side copper plate and the narrow-side copper plate is prolonged.
Description
Technical Field
The invention relates to the technical field of steel continuous casting, in particular to a clamping control method and a clamping device of a crystallizer and continuous casting equipment.
Background
In the field of steel continuous casting, the width of a crystallizer is adjusted on line, the width size of a produced steel plate blank can be adjusted in real time, the specification type of the produced steel plate blank is changed rapidly, and the market demand can be met better.
The crystallizer comprises two wide-edge copper plates and two narrow-edge copper plates, wherein the two narrow-edge copper plates are generally positioned between the two wide-edge copper plates, and the two narrow-edge copper plates are clamped by the two wide-edge copper plates in the production process of the steel plate blank, so that a containing space for containing molten steel is formed. When the on-line width adjustment is carried out, the clamping force on the two narrow-side copper plates needs to be reduced by the two wide-side copper plates (the clamping force still needs to be maintained to a certain degree so as to avoid leakage of molten steel in the accommodating space due to obvious gaps between the wide-side copper plates and the narrow-side copper plates), so that the width distance between the two narrow-side copper plates can be changed under the driving of the width adjustment driving mechanism, and the width of the steel plate blank can be changed in the subsequent production process. The broadside copper plate of the crystallizer is connected with a clamping device, and when the width is adjusted on line, the acting force on the broadside copper plate is reduced through the clamping device, so that the clamping force of the broadside copper plate on the narrow-side copper plate is reduced.
In the prior art, after the acting force of the clamping device on the wide-side copper plate is adjusted according to a common method, when the width adjusting driving mechanism is used for driving the narrow-side copper plate to move so as to adjust the width on line, excessive abrasion of the wide-side copper plate and the narrow-side copper plate still occurs, so that the service lives of the wide-side copper plate and the narrow-side copper plate are reduced. In some cases, the service life of the wide-edge copper plate or the narrow-edge copper plate is shortened by one third to one half, for example, the normal steel passing amount of one wide-edge copper plate can be 18 ten thousand tons, and the online width adjustment by adopting the scheme in the prior art can cause the steel passing amount to be shortened to 12 ten thousand tons or even 9 ten thousand tons.
Disclosure of Invention
The invention provides a clamping control method and a clamping device of a crystallizer and continuous casting equipment, and aims to solve the technical problem that the narrow-side copper plate and the wide-side copper plate of the crystallizer in the prior art are short in service life.
The invention provides a clamping control method of a crystallizer, which comprises the following steps:
obtaining the width between two narrow-side copper plates of the crystallizer;
determining the static pressure of liquid in the crystallizer on the wide-side copper plate according to the width between two narrow-side copper plates of the crystallizer;
determining the value of the soft clamping force which needs to be acted on the wide-edge copper plate by the clamping device according to the static pressure born by the wide-edge copper plate;
and controlling the force of the clamping device on the broadside copper plate to the determined soft clamping force value.
The clamping device comprises a clamping mechanism and a driving mechanism, wherein the clamping mechanism is used for providing acting force for clamping two narrow-side copper plates between two wide-side copper plates for two wide-side copper plates of the crystallizer, the acting force of the clamping mechanism for the wide-side copper plates of the crystallizer is a fixed value, and the driving mechanism is used for providing acting force opposite to that of the clamping mechanism for the wide-side copper plates of the crystallizer;
and in the step of controlling the force of the clamping device acting on the broadside copper plate to reach the determined value of the soft clamping force, adjusting the acting force of the driving mechanism on the broadside copper plate to enable the acting force of the whole clamping device on the broadside copper plate to reach the determined value of the soft clamping force.
The clamping mechanism is a disc spring, and the driving mechanism is a hydraulic cylinder or an electric cylinder.
The driving mechanism receives a remote wireless control signal or a control signal through a cable, and responds to the control of the remote wireless control signal or the control signal to adjust the acting force of the driving mechanism on the broadside copper plate.
In the step of obtaining the width between the two narrow-side copper plates of the crystallizer, the width between the two narrow-side copper plates is obtained in real time.
Wherein, the clamping control method of the crystallizer further comprises the following steps:
acquiring parameter information of liquid in a crystallizer;
and in the step of determining the static pressure of the liquid in the crystallizer to the wide-side copper plate, determining the value of the static pressure of the liquid in the crystallizer to the wide-side copper plate according to the width between two narrow-side copper plates of the crystallizer and the obtained parameter information of the liquid.
Wherein, in the step of obtaining the parameter information of the liquid in the crystallizer, the obtained parameter information of the liquid comprises at least one of the density, the height and the molten steel type of the liquid in the crystallizer.
The invention provides a clamping device of a crystallizer, which comprises a clamping execution component, a width acquisition unit, a calculation unit and a control unit; the width acquisition unit is used for acquiring the width between two narrow-side copper plates of the crystallizer; the calculation unit is used for calculating and determining the static pressure of liquid in the crystallizer on the wide-edge copper plate of the crystallizer and the value of the acting force of the clamping execution assembly on the wide-edge copper plate when the two wide-edge copper plates of the crystallizer are in soft clamping on the two narrow-edge copper plates according to the width between the two narrow-edge copper plates of the crystallizer; the control unit is used for sending a control signal to the clamping execution assembly so as to adjust the acting force of the clamping execution assembly on the wide-edge copper plate; the clamping executing assembly comprises a clamping mechanism and a driving mechanism, wherein the clamping mechanism is connected with the wide-edge copper plate of the crystallizer and is used for providing acting force for clamping two narrow-edge copper plates between the two wide-edge copper plates for the wide-edge copper plate of the crystallizer; the driving mechanism is connected with the wide-side copper plate of the crystallizer and used for providing acting force opposite to that of the clamping mechanism for the wide-side copper plate of the crystallizer, receiving the control signal sent by the control unit and adjusting the acting force on the wide-side copper plate according to the control signal.
The clamping device further comprises a width checking module, wherein the width checking module is used for detecting a width value between the two narrow-side copper plates so as to check the width values of the two narrow-side copper plates acquired by the width acquiring unit; the width checking module comprises an image acquisition unit, the image acquisition unit acquires the patterns at the two narrow-side copper plates of the crystallizer and determines the width between the two narrow-side copper plates according to the acquired images; or the width checking module comprises a distance measuring unit which is arranged on one narrow-edge copper plate of the crystallizer and used for measuring the distance between the narrow-edge copper plate and the other narrow-edge copper plate.
The control unit comprises a wireless transmitting module, and the wireless transmitting module is used for transmitting a control signal; the driving mechanism comprises a wireless receiving module, and the wireless receiving module is used for receiving the control signal transmitted by the wireless transmitting module; alternatively, the control unit comprises a cable connected to the drive mechanism for transmitting control signals between the control unit and the drive mechanism.
The invention provides a continuous casting device which comprises the clamping device of the crystallizer.
Compared with the prior art, the clamping control method and the clamping device of the crystallizer and the continuous casting equipment provided by the invention have the following advantages:
the invention provides a clamping control method of a crystallizer, which is characterized in that the width between two narrow-side copper plates of the crystallizer is obtained, the static pressure of liquid substances such as molten steel and the like in a containing space of the crystallizer on the wide-side copper plates is determined according to the width, the value of the static pressure applied to the wide-side copper plates is closer to the actual value, the force applied to the wide-side copper plates by a clamping device is further regulated and controlled, so that when the soft clamping state of the wide-side copper plates is changed, the acting force of the clamping device on the wide-side copper plates can be more accurate, the deviation is improved and reduced, the phenomenon that the soft clamping state of the wide-side copper plates is eccentric due to the larger deviation of the acting force of the clamping device on the wide-side copper plates is avoided, the friction and the abrasion between the narrow-side copper plates in the moving process can be improved, the steel passing amount of the wide-side copper plates and the narrow-side copper plates can be improved, and the service lives of the wide-side copper plates and the narrow-side copper plates are prolonged.
The width acquisition unit of the clamping device of the crystallizer can acquire the width between two narrow-side copper plates of the crystallizer, the calculation unit can determine the static pressure of liquid substances such as molten steel and the like in the accommodating space of the crystallizer on the wide-side copper plates according to the width, and the value of the static pressure applied to the wide-side copper plates is closer to the actual value, so that the force applied to the wide-side copper plates by the clamping execution assembly is further regulated and controlled by the control unit to change the soft clamping state of the wide-side copper plates, the acting force of the clamping execution assembly on the wide-side copper plates can be more accurate, the deviation can be improved and reduced, the phenomenon that the soft clamping state of the wide-side copper plates is eccentric due to the fact that the deviation of the acting force of the clamping execution assembly on the wide-side copper plates is large is avoided, further, the friction and the abrasion between the narrow-side copper plates and the wide-side copper plates in the moving process can be improved, the steel passing amount of the wide-side copper plates and the narrow-side copper plates can be improved, and the service life of the wide-side copper plates and the narrow-side copper plates can be prolonged.
The continuous casting equipment provided by the invention comprises the clamping device of the crystallizer, has the beneficial effects consistent with the clamping device of the crystallizer, and is not repeated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic flow chart of a mold clamping control method in an embodiment of the present invention;
FIG. 2 is a schematic view of a clamping device according to an embodiment of the present invention applied to a mold;
fig. 3 is a schematic diagram of the forces of the upper and lower clamping devices on the broad-side copper plate in the embodiment of the present invention.
In the figure:
10-wide-edge copper plate; 20-narrow-edge copper plate; 30-a clamping device; 40-width adjusting driving mechanism; s-a containing space.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Embodiments of a mold clamping control method, a mold clamping device, and a continuous casting apparatus according to the present invention will be described below with reference to the accompanying drawings.
For the mold, it comprises two broad-sided copper plates 10 and two narrow-sided copper plates 20. As shown in fig. 2, typically, two narrow-sided copper slabs 20 are located within two wide-sided copper slabs 10. The mold further comprises a clamping device 30, wherein the clamping device 30 is connected with the wide-side copper plates 10 and clamps the two wide-side copper plates 10, and the two wide-side copper plates 10 clamp the two narrow-side copper plates 20 positioned between the two wide-side copper plates, so that a containing space S is defined by the two narrow-side copper plates 20 and the two wide-side copper plates 10. The receiving space S is used for pouring molten steel during the continuous casting production of steel slabs. The molten steel poured into the receiving space S is maintained at a set height; generally, the height of molten steel is determined by a liquid level detection device, and the flow rate of molten steel to be injected into the accommodating space S is controlled based on detection information from the liquid level detection device, so that the height of molten steel in the accommodating space S is maintained within a predetermined threshold range.
The two narrow-side copper plates 20 of the crystallizer are connected with a width adjusting driving mechanism 40, and the width adjusting driving mechanism 40 can drive the two narrow-side copper plates 20 to relatively approach or relatively separate; the number of the width-adjusting driving mechanisms 40 connected to each narrow-side copper plate 20 is more than two, and the width-adjusting driving mechanisms 40 are vertically arranged, so that the vertical or inclined state of each narrow-side copper plate 20 can be adjusted under the driving of the width-adjusting driving mechanism 40. Based on the different adjustment of the width adjusting driving mechanism 40 to the state of each narrow-side copper plate 20 and the different adjustment of the relative position between the two narrow-side copper plates 20, the accommodating space S defined by the narrow-side copper plates 20 and the wide-side copper plates 10 can have different shapes, so that steel slab products with different shapes and specifications can be produced. The on-line width adjustment is mainly to adjust the distance between the two narrow-side copper plates 20 by the width adjustment driving mechanism 40, so as to form accommodating spaces S with different widths and prepare steel plate blank products with different width specifications. In the on-line width adjustment, molten steel and other substances are always present in the receiving space S between the narrow-side copper plate 20 and the wide-side copper plate 10 (and the liquid level of the molten steel and other substances in the receiving space S needs to be maintained within a set threshold range), so that the specification of the produced product can be quickly switched without interrupting the production process.
It can be understood that when the two wide-side copper plates 10 clamp the two narrow-side copper plates 20, the width adjusting driving mechanism 40 cannot drive the narrow-side copper plates 20 to move due to the large resistance, and the state of the narrow-side copper plates 20 is adjusted, so that the two wide-side copper plates 10 need to loosen the clamping of the two narrow-side copper plates 20 before the width adjusting driving mechanism 40 drives the narrow-side copper plates 20 to move, so that the narrow-side copper plates 20 can be moved. However, in the on-line width adjustment process, substances such as molten steel are always present in the accommodating space S, so that the two wide-side copper plates 10 cannot completely loosen the two narrow-side copper plates 20, otherwise, a significant gap is formed between the wide-side copper plates 10 and the narrow-side copper plates 20, which causes the molten steel in the accommodating space S to rapidly leak, and the liquid level height of the molten steel in the accommodating space S cannot be maintained. Therefore, when the on-line width adjustment is performed, the two wide-side copper plates 10 act on the two narrow-side copper plates 20 between a clamped state and a released state, which is generally called soft clamping. In the soft clamping state, the two narrow-side copper plates 20 can move under the driving of the width adjusting driving mechanism 40, and meanwhile, no obvious gap which can leak substances such as molten steel in large quantity is generated between the narrow-side copper plates 20 and the wide-side copper plates 10. It can be understood that the soft clamping state cannot be significantly biased tightly, nor significantly biased loosely; the eccentric tightening causes the resistance of the width adjusting driving mechanism 40 to drive the narrow-side copper plate 20 to move to be larger, and severe friction and abrasion can occur between the wide-side copper plate 10 and the narrow-side copper plate 20, so that the service lives of the wide-side copper plate 10 and the narrow-side copper plate 20 are reduced; the looseness tends to cause a significant gap between the wide-side copper plate 10 and the narrow-side copper plate 20, and the liquid material such as molten steel leaks rapidly, so that the liquid material such as molten steel in the accommodating space S cannot be maintained at a predetermined level.
As described in the background section, the soft-clamping state determined according to the general method in the prior art may cause the soft-clamping phenomenon to be tight, and severe friction and abrasion may occur between the wide-side copper plate 10 and the narrow-side copper plate 20 during the on-line width adjustment, resulting in a reduction in the service life of the wide-side copper plate 10 and the narrow-side copper plate 20.
According to a general method in the prior art, soft clamping of the two wide-sided copper plates 10 is achieved by:
firstly, the clamping device 30 of the crystallizer comprises a clamping mechanism and a driving mechanism, wherein the clamping mechanism is used for providing acting force to the wide-edge copper plates so that the two wide-edge copper plates 10 can clamp the two narrow-edge copper plates 20, and the acting force provided by the clamping mechanism to the wide-edge copper plates 10 is generally fixed; and the driving mechanism is used for providing the acting force opposite to the clamping mechanism to the wide-side copper plate 10, and the acting force provided by the driving mechanism to the wide-side copper plate 10 is adjustable.
In the normal production process of the steel plate blank product, the two wide-edge copper plates 10 clamp the two narrow-edge copper plates 20, at the moment, the driving mechanism does not provide acting force for the wide-edge copper plates 10 or provides smaller acting force for the wide-edge copper plates 10, and the requirement that the wide-edge copper plates 10 clamp the narrow-edge copper plates 20 can be met. When the width is adjusted on line and the narrow-side copper plate 20 is clamped flexibly, the driving mechanism provides acting force for the wide-side copper plate 10 or provides larger acting force for the wide-side copper plate 10 so as to weaken the clamping of the clamping mechanism for the wide-side copper plate 10 and enter a flexible clamping state.
Specifically, when the width is adjusted on line and the narrow-side copper plate 20 is clamped flexibly, the magnitude of the acting force applied by the driving mechanism to the wide-side copper plate 10 is set according to the relationship disclosed by the following formula:
F1－F2＝F3+F4………………(1)
where F1 is an urging force of the clamping mechanism to the wide-side copper plate 10, F2 is an urging force of the driving mechanism to the wide-side copper plate 10, F3 is an urging force of a substance such as molten steel in the accommodation space S to the wide-side copper plate 10, and F4 is an urging force to the wide-side copper plate 10 required to secure a gap between the wide-side copper plate 10 and the narrow-side copper plate 20 within a predetermined range (to prevent the substance such as molten steel in the accommodation space S from leaking significantly from the gap).
The relationship disclosed by the above formula (1) can be expressed as: after the driving mechanism applies an urging force or an increasing urging force to the wide-side copper plate 10 to weaken the clamping state of the clamping mechanism to the wide-side copper plate 10, the clamping force (F1-F2) actually applied to the wide-side copper plate 10 needs to overcome the static pressure (F3) of the molten steel or other substances in the accommodation space S received by the wide-side copper plate 10, and needs to ensure that the gap between the wide-side copper plate 10 and the narrow-side copper plate 20 is within a predetermined range (the urging force applied to the wide-side copper plate 10 is equal to F4).
The inventors of the present invention found that: in the soft clamping state, the two narrow-side copper plates 20 have different width distances, and static pressure of molten steel and other substances in the accommodating space S acting on the wide-side copper plate 10 is different; specifically, when the width distance between the two narrow-side copper plates 20 is small, the amount of molten steel or other substance in the receiving space S is small, and accordingly, the static pressure of molten steel or other substance received by the wide-side copper plate 10 is small; on the other hand, when the width distance between the two narrow-side copper plates 20 is large, the amount of molten steel and other substances in the accommodation space S is large, and accordingly, the static pressure of molten steel and other substances to the wide-side copper plate 10 is large.
However, in the above-described conventional general method, regardless of the distance between the two narrow-side copper plates 20, the force F3, which is the force applied by the molten steel or the like in the receiving space S to the wide-side copper plate 10, is constantly set to the static pressure applied to the wide-side copper plate 10 when the distance between the two narrow-side copper plates 20 is the maximum (when producing a steel slab product having the widest width). That is, in almost various cases, the value of F3 in the above formula (1) is larger than the actual value, and in the case where the values of F1 and F4 are fixed (F1 is generally a fixed value, and the value of F4 is determined by calculation such as theory or experience, experiments, and the like), the larger value of F3 compared to the actual value results in a smaller value of F2 and a larger clamping force (F1-F2) actually applied to the broad-side copper plate 10; in this way, the clamping forces (F1-F2) actually experienced by the broadside copper plate 10 overcome the actual value of the static pressure F3 experienced by the broadside copper plate 10, and the remaining force value is still large, i.e. the actual value of F4 is large. As a result, in the actual soft-clamping state, the force applied to the two wide-side copper plates 10 is larger, the soft-clamping state is tighter, and the friction and wear between the two narrow-side copper plates 20 and the wide-side copper plates 10 during movement are more severe, which results in the problems of less steel passing amount and short service life of the wide-side copper plates 10 and the narrow-side copper plates 20 in the prior art.
In one embodiment of the invention, with reference to fig. 1, the clamping control method of the crystalliser comprises selected steps S1 to S4.
Step S1, obtaining the width between two narrow-side copper plates 20 of the crystallizer.
In one embodiment of the invention, the width between the two narrow-sided copper slabs 20 of the mold can be taken directly from the control device for on-line width adjustment. It can be understood that the control device for on-line width adjustment drives the two narrow-side copper plates 20 to move through the width adjustment driving mechanism 40, so that the width between the two narrow-side copper plates reaches the target width, and therefore, the control device for on-line width adjustment naturally has the target width information of the two narrow-side copper plates 20. The control device for online width adjustment records and stores various parameters of the steel plate blank product to be produced, including information such as the width and the taper of the steel plate blank. The specific ultimate source of such parameter information in the on-line broadening control device may be a customer production data system. Based on these parameters in the on-line width-adjusting control device, the target width of the two narrow-side copper slabs 20 of the mold to be adjusted can be obtained.
In this embodiment, after the target width information of the two narrow-side copper plates 20 is obtained in the above manner and the width adjusting driving mechanism 40 drives the two narrow-side copper plates 20 to move to the right position, the actual width distance between the two narrow-side copper plates 20 can be detected, verified, and checked to determine whether the distance between the two narrow-side copper plates 20 reaches the target width.
In particular, in one embodiment of the invention, the width between the two narrow-sided copper plates 20 of the crystallizer can be detected and verified by the image acquisition unit. The specific process of detecting the width between the two narrow-side copper plates 20 may be that the image acquisition unit acquires the patterns of the two narrow-side copper plates 20, and determines the distance between the two narrow-side copper plates 20 according to the acquired images (for example, the relative position of the narrow-side copper plates 20 on the wide-side copper plate 10 in the images, etc., or based on other principles). If the detected value is equal to the target width, the subsequent steps can be continued; if the detected value deviates from the target width, further adjustment of the two narrow-sided copper plates 20 is required to bring the distance between the two to the target width.
In another embodiment of the invention, the width between the two narrow-sided copper plates 20 of the crystallizer can also be detected and verified by a distance measuring unit. The specific process may be that a distance measuring unit is respectively arranged on one or two narrow-side copper plates 20, and the width between the two narrow-side copper plates 20 is determined through the measurement of the distance measuring unit. The distance measuring unit may specifically be based on an optical distance measuring method, such as laser distance measuring.
In one embodiment of the present invention, the acquisition of the width between the two narrow-side copper slabs 20 may be acquired in real time, that is, the width parameter information and the variation thereof between the two narrow-side copper slabs 20 are continuously acquired and monitored. In addition to this, the width of the two narrow-sided copper slabs 20 may be acquired at intervals, for example, periodically or upon receipt of a command.
And S2, determining the static pressure of the liquid in the crystallizer on the wide-side copper plate 10 according to the width between the two narrow-side copper plates 20 of the crystallizer.
In step S2, as described above, when the on-line widening is performed, the material such as molten steel in the receiving space S of the mold is maintained at the predetermined liquid level height, and in this state, the width between the two narrow-side copper plates 20 determines the amount of the material such as molten steel in the receiving space S, that is, the static pressure of the material such as molten steel in the receiving space S against the wide-side copper plate 10. Therefore, with other parameter conditions known, the static pressure of the material such as molten steel in the receiving space S of the mold against the broad-side copper plate 10 can be determined based on the width between the two narrow-side copper plates 20.
And S3, determining the value of the soft clamping force which needs to be acted on the wide-edge copper plate 10 by the clamping device 30 according to the static pressure born by the wide-edge copper plate 10.
The clamping device of the crystallizer comprises a clamping mechanism and a driving mechanism, wherein the clamping mechanism is used for providing acting force for clamping two narrow-side copper plates 20 positioned between two wide-side copper plates 10 for the two wide-side copper plates 10 of the crystallizer, and the acting force of the clamping mechanism on the wide-side copper plates 10 of the crystallizer is a fixed value; the drive mechanism is used to provide a force on the broad-sided copper plate 10 of the crystallizer that opposes the clamping mechanism. Specifically, the clamping mechanism may be a disk spring, and the driving mechanism may be a hydraulic cylinder or an electric cylinder (preferably, a hydraulic cylinder, one of the differences between the two is that the hydraulic cylinder may directly output a force to the broad-side copper plate 10, while the electric cylinder needs to move by displacement to realize an acting force to the broad-side copper plate 10, and the hydraulic cylinder more meets the requirement of applying the acting force to the broad-side copper plate 10 in the scenario of the present invention).
When the driving mechanism is a hydraulic cylinder, the clamping device further comprises a hydraulic valve table, the hydraulic valve table is connected with the hydraulic cylinder, the hydraulic valve table can remotely adjust the pressure of the hydraulic cylinder, and the acting force of the clamping mechanism on the wide-edge copper plate 10 is controlled through the hydraulic valve table. When the hydraulic valve table adjusts the pressure of the hydraulic cylinder, the pressure adjusting device can be achieved by controlling the proportional valve on the hydraulic valve table.
With respect to the force applied to the wide-side copper plate 10, i.e., F1 to F4, the static pressure (F3) of the substance such as molten steel in the accommodation space S against the wide-side copper plate 10 has been determined in step S2, and the clamping force F4 to the wide-side copper plate 10 required to ensure that the gap between the wide-side copper plate 10 and the narrow-side copper plate 20 is within a prescribed range can be determined by calculation or by experiment, and the force (F1) applied to the wide-side copper plate 10 by the clamping mechanism is a fixed value. That is, F1, F3 and F4 are determined, and then the force of the driving mechanism on the wide-side copper plate 10 of the mold, that is, the value of F2, can be obtained according to the above formula (1). After the value of F2 is determined, F1-F2, i.e., the clamping device 30 as a whole, requires a force on the broad-side copper plate 10 to be determined in step S3.
And S4, controlling the force of the clamping device 30 acting on the wide-side copper plate 10 to the determined soft clamping force value.
In step S4, the force (F1-F2) of the entire clamping device 30 against the broad-side copper plate 10 is adjusted to the determined value of the soft clamping force by adjusting the force (F2) of the driving mechanism against the broad-side copper plate 10. In this state, the force (F1-F2) of the clamping device 30 acting on the wide-side copper plate 10 as a whole can maintain the soft clamping between the wide-side copper plate 10 and the narrow-side copper plate 20 after overcoming the static pressure (F3) of the molten steel and the like in the accommodating space S of the mold on the wide-side copper plate 10, thereby avoiding the formation of a gap exceeding the set specification between the wide-side copper plate 10 and the narrow-side copper plate 20.
Specifically, in step S4, the driving mechanism receives a remote wireless control signal or a control signal through a cable, and adjusts the force of the driving mechanism on the broad-side copper plate 10 in response to the control of the remote wireless control signal or the control signal. The arrangement can ensure that the working personnel can control the on-line width adjusting process of the crystallizer in a remote operation mode without approaching the crystallizer, and can also ensure that the working personnel are far away from substances such as molten steel in the crystallizer and the like, and high-temperature and dangerous environments. In particular, in implementation, a scheme of transmitting the control signal through the cable may be preferably adopted because the crystallizer itself has the cable for transmitting various signals, and in implementation, an existing cable may be used or a dedicated cable may be added, and even if a dedicated cable is added, other adverse problems may not be obviously caused. Moreover, the reliability and stability of the way of transmitting the control signal by the cable may be higher.
In an embodiment of the present invention, similar to the width-adjusting driving device 40, the mold may include a plurality of clamping devices 30, and the plurality of clamping devices 30 may be disposed up and down. For example, the mold may comprise two clamping devices 30, respectively associated with the upper and lower portions of the broad-side copper plate 10. In this case, since the upper and lower clamps are located at different positions in the vertical direction and are subjected to different static pressures (F3), and the forces (F4) applied to the wide-side copper plate 10 by the upper and lower clamps are required to be different when the gap between the wide-side copper plate 10 and the narrow-side copper plate 20 is maintained within the predetermined specification range, the forces (F2) applied to the wide-side copper plate 10 by the drive mechanism required to be adjusted and outputted are different between the upper and lower clamps when the on-line width adjustment is performed, so that the forces (F1 to F2) applied to the wide-side copper plate 10 by the upper and lower clamps as a whole are different, as shown in fig. 3. In fig. 3, the horizontal axis represents the width between the two narrow-side copper slabs 20, and the vertical axis represents the force applied by the clamping device to the wide-side copper slab 10, and it can be seen that, when the width between the two narrow-side copper slabs 20 is any value, the force (F1-F2) applied by the upper clamping device to the wide-side copper slab 10 as a whole is smaller, and the force (F1-F2) applied by the lower clamping device to the wide-side copper slab as a whole is larger. In the case of satisfying the above conditions, the force (F1) of the clamping mechanism of the upper and lower clamping devices on the fixation of the broad-side copper plate may also be different, and in comparison, the force (F1) of the clamping mechanism of the lower clamping device on the broad-side copper plate may be larger, while the force (F1) of the clamping mechanism of the upper clamping device on the broad-side copper plate may be smaller.
In one embodiment of the invention, the method for controlling the clamping of the crystalliser further comprises the following steps: and acquiring parameter information of the liquid in the crystallizer. Wherein the acquired parameter information of the liquid comprises at least one of the density, the height and the molten steel type of the liquid in the crystallizer.
In the production process of the steel slab product, the produced steel slab has different steel types and different superheat degrees, and different influences are generated on the static pressure of the wide-side copper plate 10, so that the static pressure values of the wide-side copper plate 10 under different conditions are different. Therefore, in one embodiment of the present invention, one or more of the density, height, and molten steel type of the liquid material such as molten steel produced in the mold are obtained, and in the step of determining the static pressure of the liquid in the mold against the broad-side copper plate 10, the value of the static pressure of the liquid in the mold against the broad-side copper plate 10 is determined according to the width between the two narrow-side copper plates 20 of the mold and the obtained parameter information of the liquid, which helps to make the determined value of the static pressure applied to the broad-side copper plate 10 more accurate, and further, the soft clamping state of the two broad-side copper plates 10 of the mold is more accurate, not only more tight or loose.
In summary, according to the clamping control method for the mold provided by the present invention, the width between the two narrow-side copper plates 20 of the mold is obtained, and the static pressure of the liquid substance such as molten steel in the accommodating space S of the mold to the wide-side copper plate 10 is determined according to the width, and the value of the static pressure applied to the wide-side copper plate 10 is closer to the actual value, so that when the force applied to the wide-side copper plate 10 by the clamping device 30 is further controlled to change the soft clamping state of the wide-side copper plate 10, the acting force applied to the wide-side copper plate 10 by the clamping device 30 can be more accurate, the deviation can be improved and reduced, the phenomenon that the soft clamping state of the wide-side copper plate 10 is biased due to the large deviation of the acting force applied to the wide-side copper plate 10 by the clamping device 30 can be avoided, and the friction between the narrow-side copper plate 20 and the wide-side copper plate 10 and the copper plate abrasion can be improved, and the service lives of the wide-side copper plate 10 and the narrow-side 20 can be prolonged.
The invention also provides a clamping device of the crystallizer. In one embodiment of the present invention, the clamping device 30 includes a clamping execution assembly, a width acquisition unit, a calculation unit, and a control unit. Wherein the width obtaining unit is used for obtaining the width between the two narrow-side copper plates 20 of the crystallizer. The calculation unit is used for calculating and determining the static pressure of the liquid in the crystallizer on the wide-side copper plate 10 of the crystallizer and the value of the acting force of the clamping execution assembly on the wide-side copper plate 10 when the two wide-side copper plates 10 of the crystallizer are in soft clamping on the two narrow-side copper plates 20 according to the width between the two narrow-side copper plates 20 of the crystallizer. The control unit is used for sending a control signal to the clamping execution assembly so as to adjust the acting force of the clamping execution assembly on the wide-edge copper plate 10. The clamping executing assembly comprises a clamping mechanism and a driving mechanism, wherein the clamping mechanism is connected with the wide-edge copper plate 10 of the crystallizer and is used for providing acting force for clamping two narrow-edge copper plates 20 positioned between the two wide-edge copper plates 10 for the wide-edge copper plate 10 of the crystallizer; the driving mechanism is connected with the wide-side copper plate 10 of the crystallizer and used for providing acting force opposite to the clamping mechanism for the wide-side copper plate 10 of the crystallizer, and the driving mechanism receives the control signal sent by the control unit and adjusts the acting force on the wide-side copper plate 10 according to the control signal.
In the above embodiment, the width obtaining unit can obtain the width between the two narrow-side copper plates 20 of the mold, and the calculating unit can determine the static pressure of the liquid substance such as molten steel in the accommodating space S of the mold on the wide-side copper plate 10 according to the width, so that the value of the static pressure applied to the wide-side copper plate 10 is closer to the actual value, and the control unit further regulates and controls the force applied to the wide-side copper plate 10 by the clamping executing component, so as to change the soft clamping state of the wide-side copper plate 10, so that the acting force applied to the wide-side copper plate 10 by the clamping executing component is more accurate, the deviation is improved and reduced, the phenomenon that the soft clamping state of the wide-side copper plate 10 is slightly tight due to the large deviation of the acting force applied to the wide-side copper plate 10 by the clamping executing component is avoided, and further, the friction and the abrasion between the narrow-side copper plate 20 and the wide-side copper plate 10 during the movement process can be improved, and the steel throughput of the wide-side copper plate 10 and the narrow-side copper plate 20 can be improved, and the service life of the wide-side copper plate 10 and the narrow-side 20 can be prolonged.
Specifically, in one embodiment, the width acquisition unit may acquire the width between the two narrow-side copper plates 20 of the mold directly from the control device for on-line width adjustment in a manner of receiving a signal or the like. It can be understood that the control device for on-line width adjustment drives the two narrow-side copper plates 20 to move through the width adjustment driving mechanism 40, so that the width between the two narrow-side copper plates reaches the target width, and therefore, the control device for on-line width adjustment naturally has the target width information of the two narrow-side copper plates 20. The control device for online width adjustment records and stores various parameters of the steel plate blank product to be produced, including information such as the width and the taper of the steel plate blank. The specific ultimate source of such parameter information in the on-line broadening control device may be a customer production data system. Based on these parameters in the on-line width-adjusting control device, the target width of the two narrow-side copper slabs 20 of the mold to be adjusted can be obtained.
In one embodiment of the clamping device, the clamping device may further include a width checking module, which is configured to detect a width value between the two narrow-side copper plates to check the width value of the two narrow-side copper plates acquired by the width acquiring unit. Specifically, the width acquisition unit may include an image acquisition unit that acquires a pattern at the two narrow-side copper plates 20 of the mold and determines the width between the two narrow-side copper plates 20 from the acquired image. In addition, the width checking module may further include a distance measuring unit disposed on one narrow-side copper plate 20 of the mold for measuring a distance between the narrow-side copper plate 20 and the other narrow-side copper plate 20.
In one embodiment of the present invention, the control unit comprises a wireless transmission module, the wireless transmission module is used for transmitting a control signal; the driving mechanism comprises a wireless receiving module, and the wireless receiving module is used for receiving the control signal transmitted by the wireless transmitting module. The arrangement enables a worker to control the movement and the state of the narrow-side copper plate 20 of the mold in a remote operation manner, so that the substance such as molten steel in the accommodating space S of the mold can be kept away without approaching the mold.
In another embodiment of the invention, the control unit comprises a cable connected to the drive mechanism for transmitting control signals between said control unit and the drive mechanism. This arrangement can achieve the same effects as the above-described wireless transmission of the control signal, and the stability and reliability of the transmission of the control signal between the control unit and the drive mechanism using the cable can be higher.
The invention also provides continuous casting equipment. In one embodiment of the invention, the continuous casting plant comprises the clamping device of the crystalliser described above.
The continuous casting equipment provided by the invention comprises the clamping device of the crystallizer, has the beneficial effect consistent with that of the clamping device of the crystallizer, and is not repeated.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A clamping control method of a mold, characterized by comprising:
obtaining the width between two narrow-side copper plates of the crystallizer;
determining the static pressure of liquid in the crystallizer on the wide-edge copper plate according to the width between the two narrow-edge copper plates of the crystallizer;
determining the value of the soft clamping force which needs to be acted on the wide-edge copper plate by the clamping device according to the static pressure born by the wide-edge copper plate;
and controlling the force of the clamping device on the broadside copper plate to the determined soft clamping force value.
2. The clamping control method of the mold according to claim 1, wherein the clamping device comprises a clamping mechanism for providing an acting force for clamping the two broad-side copper plates of the mold between the two broad-side copper plates, and a driving mechanism for providing an acting force for the broad-side copper plates of the mold opposite to the clamping mechanism, wherein the acting force of the clamping mechanism for the broad-side copper plates of the mold is a fixed value;
and in the step of controlling the force of the clamping device acting on the broadside copper plate to reach the determined value of the soft clamping force, adjusting the acting force of the driving mechanism on the broadside copper plate to enable the acting force of the whole clamping device on the broadside copper plate to reach the determined value of the soft clamping force.
3. The method for controlling clamping of a crystallizer as claimed in claim 2, wherein said clamping mechanism is a belleville spring and said driving mechanism is a hydraulic cylinder or an electric cylinder.
4. The mold clamping control method according to claim 3, wherein the driving mechanism receives a remote wireless control signal or a control signal through a cable, and adjusts the force of the driving mechanism on the broadside copper plate in response to the control of the remote wireless control signal or the control signal.
5. The clamping control method of the mold according to claim 1, wherein the width between the two narrow-side copper plates of the mold is obtained in real time in the step of obtaining the width between the two narrow-side copper plates of the mold.
6. The method for controlling clamping of a crystalliser according to claim 1, characterised in that it further comprises:
acquiring parameter information of liquid in a crystallizer;
and in the step of determining the static pressure of the liquid in the crystallizer to the wide-side copper plate, determining the value of the static pressure of the liquid in the crystallizer to the wide-side copper plate according to the width between two narrow-side copper plates of the crystallizer and the obtained parameter information of the liquid.
7. The clamping control method of a mold according to claim 6, wherein in the step of acquiring the parameter information of the liquid inside the mold, the acquired parameter information of the liquid includes at least one of a density, a height, and a kind of molten steel of the liquid inside the mold.
8. The clamping device of the crystallizer is characterized by comprising a clamping execution assembly, a width acquisition unit, a calculation unit and a control unit;
the width acquisition unit is used for acquiring the width between two narrow-side copper plates of the crystallizer;
the calculation unit is used for calculating and determining the static pressure of liquid in the crystallizer on the wide-edge copper plate of the crystallizer and the value of the acting force of the clamping execution assembly on the wide-edge copper plate when the two wide-edge copper plates of the crystallizer are in soft clamping on the two narrow-edge copper plates according to the width between the two narrow-edge copper plates of the crystallizer;
the control unit is used for sending a control signal to the clamping execution assembly so as to adjust the acting force of the clamping execution assembly on the wide-edge copper plate;
the clamping executing assembly comprises a clamping mechanism and a driving mechanism, wherein the clamping mechanism is connected with the wide-edge copper plate of the crystallizer and is used for providing acting force for clamping the two narrow-edge copper plates between the two wide-edge copper plates for the wide-edge copper plate of the crystallizer; the driving mechanism is connected with the broadside copper plate of the crystallizer and used for providing acting force opposite to the clamping mechanism for the broadside copper plate of the crystallizer, receiving the control signal sent by the control unit and adjusting the acting force on the broadside copper plate according to the control signal.
9. The clamping device of a crystallizer as claimed in claim 8, characterized in that it further comprises a width checking module for detecting the width value between the two narrow-sided copper plates to check the width value of the two narrow-sided copper plates acquired by the width acquiring unit;
the width checking module comprises an image acquisition unit, the image acquisition unit acquires the patterns at the two narrow-side copper plates of the crystallizer and determines the width between the two narrow-side copper plates according to the acquired images; or
The width checking module comprises a distance measuring unit, wherein the distance measuring unit is arranged on one narrow-edge copper plate of the crystallizer and is used for measuring the distance between the narrow-edge copper plate and the other narrow-edge copper plate.
10. The clamping device of a crystallizer as claimed in claim 8, characterized in that said control unit comprises a wireless transmission module for transmitting control signals; the driving mechanism comprises a wireless receiving module, and the wireless receiving module is used for receiving the control signal transmitted by the wireless transmitting module; or
The control unit includes a cable connected to the drive mechanism for transmitting control signals between the control unit and the drive mechanism.
11. Continuous casting installation, characterized in that it comprises the clamping device of the mould according to any one of claims 8 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210743424.1A CN115229141A (en) | 2022-06-27 | 2022-06-27 | Clamping control method and clamping device for crystallizer and continuous casting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210743424.1A CN115229141A (en) | 2022-06-27 | 2022-06-27 | Clamping control method and clamping device for crystallizer and continuous casting equipment |
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| CN115229141A true CN115229141A (en) | 2022-10-25 |
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| CN202210743424.1A Pending CN115229141A (en) | 2022-06-27 | 2022-06-27 | Clamping control method and clamping device for crystallizer and continuous casting equipment |
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| Country | Link |
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| CN (1) | CN115229141A (en) |
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- 2022-06-27 CN CN202210743424.1A patent/CN115229141A/en active Pending
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