CN116079026A - Method and device for adjusting solidifying point position of liquid cavity of large-diameter pipe - Google Patents
Method and device for adjusting solidifying point position of liquid cavity of large-diameter pipe Download PDFInfo
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- CN116079026A CN116079026A CN202211666608.9A CN202211666608A CN116079026A CN 116079026 A CN116079026 A CN 116079026A CN 202211666608 A CN202211666608 A CN 202211666608A CN 116079026 A CN116079026 A CN 116079026A
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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
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
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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
- B22D11/18—Controlling or regulating processes or operations for pouring
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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
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
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Abstract
The invention provides a method and a device for adjusting the solidifying point position of a liquid cavity of a large-diameter pipe, wherein the adjusting method comprises the following specific steps: s1, initializing a device; and respectively detecting the upper and lower solidifying point positions of a liquid cavity in the device in the casting process: s2, starting an amplitude detector, judging the position of the amplitude detector from the freezing point according to the value detected by the amplitude detector, and drawing a corresponding functional relation to obtain the positions of the upper and lower freezing points in the liquid cavity; s3, detecting the damage position of the casting assembly through a stress detector and an amplitude detector, and adjusting the upper and lower freezing point positions of the liquid cavity in the device. The adjusting device comprises a smelting casting assembly, a condensing assembly and a secondary condensing assembly. The invention can accurately monitor the quality of the casting component, discover damage and adjust the condensation position in time, realize the maximization of efficiency, and simultaneously better reduce the problem of casting blank quality defects caused by the difference of cooling time of the inner wall and the outer wall of the casting blank.
Description
Technical Field
The invention relates to the technical field of continuous casting of pipes, is suitable for pipes with large diameter and large thickness, in particular to a method and a device for adjusting the solidifying point position of a liquid cavity of a pipe with large diameter.
Background
In the casting process of the metal casting blank, the molten metal is condensed to form a critical part, the temperature suddenly drops due to the too fast condensation, so that larger stress is generated in the casting blank, the steel leakage phenomenon is generated due to the too slow condensation speed, and the danger is generated, so that the method is critical to the control of the liquid cavity condensation position in the casting blank casting process.
In addition, in the process of processing operation of the existing casting blank casting forming device, the phenomenon of casting blank hardening can occur in the casting device due to the fact that molten metal is converted into liquid metal in the process, residual stress can be left inside and outside the casting device due to the effect of thermal expansion and cold contraction, damage to the wall of the casting device can be generated due to the fact that molten metal is cooled in the fixed range of the wall of the casting device for a long time, casting quality is affected, even casting accidents are caused, and the existing wall of the casting device can only be stopped after the damage.
The invention controls the solidifying point of the liquid cavity by arranging the condensing components on the inner layer and the outer layer of the casting blank respectively, and accurately monitors the liquid cavity by the stress detector, the amplitude detector and the like, so that the performance of the casting blank can be improved, and continuous casting can be realized without stopping the machine after the wall of the casting device is damaged. Meanwhile, the method is suitable for tube blanks with medium or large aperture, and the tube blanks with larger aperture have severe working conditions when in actual use and are sensitive to stress of the tube blanks, so that casting forming stress of the tube blanks needs to be reduced in the continuous casting process.
Disclosure of Invention
According to the method and the device for adjusting the solidifying point position of the liquid cavity of the large-diameter pipe, vibration caused by position difference of the liquid cavity is detected through the stress detector and the amplitude detector, whether a casting component is damaged or not is monitored in real time, the first screw sliding rail component and the second screw sliding rail component drive the outer layer condensing component and the inner layer condensing component to be far away from a damaged area, and meanwhile, the upper solidifying point position and the lower solidifying point position of the liquid cavity are adjusted in real time through adjusting water inlet and outlet amounts of the outer layer condensing component and the inner layer condensing component and current intensity and frequency of an electromagnetic crystallizer, so that shutdown processing times are reduced, high-efficiency casting is achieved, and the quality of casting blanks is optimal.
The invention provides a method for adjusting the solidifying point position of a liquid cavity of a large-diameter pipe, which comprises the following specific implementation steps:
s1, initializing a device.
S2, respectively detecting the positions of a freezing point and a lower freezing point on a liquid cavity in the device in the casting process: starting an amplitude detector, judging the positions of the amplitude detector from an upper freezing point and a lower freezing point according to the magnitude of the values detected by the amplitude detector, and obtaining a liquid cavity shape curve function relation to obtain the positions of the upper freezing point and the lower freezing point in the liquid cavity, wherein the expression of the liquid cavity shape curve function relation is as follows:
F(x)＝P 2
Wherein P is the pressure intensity of molten metal in the casting assembly, and the specific expression is:
P＝∣J×B∣+KF
wherein J is induction current, B is magnetic current density acting on the casting component, K is curvature radius of the liquid cavity curved surface, and F is surface tension of the liquid cavity;
according to the heat exchange relation between the condensed water temperature and the liquid pit, the expression for dynamically adjusting the liquid pit shape curve function is obtained as follows:
f(x)＝q b +△h
wherein q b For the heat transfer capacity of the cast component and the condensing component, Δh is the difference between the freezing points.
S3, detecting the damage condition of the casting assembly through a stress detector and an amplitude detector, and adjusting the positions of a freezing point and a lower freezing point on a liquid cavity in the device:
if the casting component is in the first state, and the inner layer condensation component and the outer layer condensation component are fixed, the upper and lower solidifying point positions of the liquid cavity are respectively adjusted by adjusting the water flow of the water inlet and outlet pipes of the outer layer condensation component, the water flow of the water inlet and outlet pipes of the inner layer condensation component and the current intensity and frequency of the electromagnetic crystallizer;
if the casting component is in the second state, further judging the damaged position and adjusting the positions of the upper solidifying point and the lower solidifying point of the liquid cavity:
if the inner layer of the casting component is damaged, the first screw rod sliding rail component and the second screw rod sliding rail component drive the outer layer to be condensed The modules and the inner condensing modules are each moved by a distance Y along the X-axis, i.e. y=x 2 Syndrome of deficiency the x-ray number of the optical fiber is, wherein x is 2 For the determined position of the inner layer solidification point before damage, deltax is the damaged length of the casting component, and the newly obtained solidification point position y is assigned to x 2 The method comprises the steps of carrying out a first treatment on the surface of the Then judging the solidifying point x detected by the amplitude detector positioned on the outer layer of the casting component 1 And the newly obtained solidification point x detected by the amplitude detector positioned in the inner layer of the casting assembly 2 Is a difference in (2);
if the outer layer of the casting component is damaged, the first screw rod sliding rail component and the second screw rod sliding rail component drive the outer layer condensation component and the inner layer condensation component to move along the X axis by Y distance respectively, namely Y=x 1 Syndrome of deficiency the x-ray number of the optical fiber is, wherein x is 1 For the determined position of the solidification point of the outer layer before damage, deltax is the length of damage to the casting component, and the newly obtained position y of the solidification point is assigned to x 1 The method comprises the steps of carrying out a first treatment on the surface of the In determining the solidifying point x detected by an amplitude detector located in the inner layer of the casting assembly 2 And the newly obtained solidification point x detected by an amplitude detector positioned on the outer layer of the casting component 1 Is a difference in (c).
Preferably, the specific operation procedure of the initializing device in the step S1 is as follows:
s11, moving an electromagnetic crystallizer, an inner layer condensing assembly and an outer layer condensing assembly in the condensing assembly to a preset position of a casting assembly, which is close to a secondary condensing assembly;
S12, introducing water flow Q into the outer layer condensing assembly through the water inlet and outlet pipe of the outer layer condensing assembly 1 The water flow Q is introduced into the inner layer condensation assembly through the water inlet and outlet pipe of the inner layer condensation assembly 2 ；
And S13, injecting molten metal into the casting component by utilizing a metal melting furnace, solidifying the molten metal under the combined action of the electromagnetic crystallizer, the inner layer condensing component and the outer layer condensing component, and gradually forming a casting blank in the casting component.
Preferably, the specific operation procedure of the detection device in step S2 for the position of the upper and lower freezing points of the liquid cavity is as follows:
s21, establishing a coordinate system by using the center position of the casting assembly away from the secondary condensation assembly, and defining the X-axis direction along the castingThe initial positions of the inner layer condensing component and the outer layer condensing component are respectively set as x in the axial direction of the casting pipe, and the solidifying point position of the outer layer condensing component is set as x 1 The freezing point position of the inner layer condensation component is set as x 2 Setting a standard position difference delta h of a liquid cavity solidifying point according to casting requirements;
s22, if the amplitude detector positioned on the outer layer of the casting component detects the solidifying point x 1 >x, the water inflow Q of the water inlet pipe and the water outlet pipe of the outer condensing assembly is increased 1 Up to x 1 =x; if the solidifying point x detected by the amplitude detector is positioned on the outer layer of the casting component 1 <x, the water inflow Q of the water inlet and outlet pipes of the outer condensing assembly is reduced 1 Up to x 1 ＝x；
If the solidifying point x detected by the amplitude detector positioned in the inner layer of the casting component 2 >x, the water inflow Q of the water inlet and outlet pipes of the inner condensing assembly is increased 2 Up to x 2 =x; if the solidifying point x detected by the amplitude detector positioned in the inner layer of the casting component 2 <x, the water inflow Q of the water inlet and outlet pipes of the inner condensation assembly is reduced 2 Up to x 2 ＝x；
S23, if the amplitude detector positioned on the outer layer of the casting component detects the solidifying point x 1 When x, the solidifying point x detected by the amplitude detector positioned on the outer layer of the casting component is further judged 1 And a freezing point x detected by an amplitude detector located in the inner layer of the casting assembly 2 Is the difference of (a): if x 1 -x 2 >At delta h, the water flow rate Q of the water inlet and outlet pipes of the inner layer condensation assembly is reduced 2 Until |x 1 -x 2 |<Δh; if x 2 -x 1 >Δh, the water flow rate Q of the water inlet and outlet pipes of the inner layer condensation assembly is increased 2 Until |x 2 -x 1 |<△h。
Preferably, the judgment of x is made when the inner layer of the casting assembly is damaged 1 And x 2 The specific process of the difference value is as follows: if x 1 -x 2 >At delta h, the water flow Q of the water inlet and outlet pipes of the outer condensing assembly is increased 1 Up to x 1 -x 2 <Δh; if x 2 -x 1 >Δh, then reduce the outer layer condensationWater flow Q of assembly water inlet and outlet pipe 1 Up to x 2 -x 1 <△h。
Preferably, the judgment of x is made when the cast component outer layer is damaged 1 And x 2 The specific process of the difference value is as follows: if x 1 -x 2 >At delta h, the water flow rate Q of the water inlet and outlet pipes of the inner layer condensation assembly is reduced 2 Up to x 1 -x 2 <Δh; if x 2 -x 1 >Δh, the water flow rate Q of the water inlet and outlet pipes of the inner layer condensation assembly is increased 1 Up to x 2 -x 1 <△h。
Preferably, in step S3, the parameters of the position of the upper and lower solidification points of the liquid pit are adjusted, and the method further comprises adjusting the stretching speed V of the roller and the current i of the electromagnetic crystallizer.
In another aspect of the invention, a device for adjusting the solidification point position of a liquid cavity of a large-diameter pipe is provided, which comprises a smelting casting component, a condensation component and a secondary condensation component. The smelting casting assembly comprises a smelting furnace and a casting assembly, wherein the output end of the smelting furnace is connected with the input end of a casting pipe in the casting assembly, the casting assembly comprises a casting pipe, an outer casting assembly layer and an inner casting assembly layer, the output end of the casting pipe is connected with the input end of the outer casting assembly layer, the outer casting assembly layer is coaxially installed with the inner casting assembly layer, a casting blank cavity is formed between the outer casting assembly layer and the inner casting assembly layer, and a casting blank is positioned in the casting blank cavity. The condensing assembly comprises an electromagnetic crystallizer, an outer layer condensing assembly, an inner layer condensing assembly, an outer layer condensing assembly water inlet and outlet pipe, an outer layer condensing support frame, an inner layer condensing assembly water inlet and outlet pipe, a first screw rod sliding rail assembly and a second screw rod sliding rail assembly, wherein a first installation end of the outer layer condensing assembly is connected with a first installation end of the outer wall of the casting assembly, the electromagnetic crystallizer is enveloped at a second installation end of the outer layer condensing assembly, the inner layer condensing assembly is connected with an installation end of the inner wall of the inner layer of the casting assembly, the input ends of the outer layer condensing assembly and the inner layer condensing assembly are respectively connected with the outer layer condensing assembly water inlet and outlet pipe and the inner layer condensing assembly water inlet and outlet pipe, the first screw rod sliding rail assembly is connected with a third installation end of the outer layer condensing assembly through the outer layer condensing support frame, and the second screw rod sliding rail assembly is connected with a second installation end of the inner layer condensing assembly through a six-side inner screw nut; the first screw rod sliding rail assembly comprises a bearing and a first screw rod, and the first motor is connected with the input end of the first screw rod through the bearing; the second lead screw sliding rail assembly comprises a second lead screw and a lead screw protection cover, the second lead screw is positioned in the lead screw protection cover, and the input end of the second lead screw is connected with a second motor.
Preferably, the casting device further comprises thermocouples, rollers, stress detectors and amplitude detectors, wherein the thermocouples are uniformly arranged on the inner wall of the inner layer of the casting assembly along the axis of the inner layer of the casting assembly, the stress detectors and the amplitude detectors are uniformly distributed on the outer wall of the outer layer of the casting assembly and one end, close to the input metal liquid, of the inner wall of the inner layer of the casting assembly along the circumferential direction respectively, and the rollers are positioned at the output end of the casting blank cavity.
Preferably, the secondary condensing assembly further comprises a cooling liquid port, a cooling water jacket and a fixed condensing piece, wherein the cooling water jacket and the fixed condensing piece are respectively connected with the second mounting end and the third mounting end of the outer wall of the outer layer of the casting assembly, and the cooling liquid port and the roller are positioned on the same side.
Compared with the prior art, the invention has the following advantages:
1. the invention detects the positions of the upper and lower solidifying points of the metal liquid cavity through the combined action of the stress detector and the amplitude detector, and adjusts the upper solidifying point and the lower solidifying point of the metal liquid cavity in the casting blank in real time by controlling the positions of the inner layer condensing assembly, the outer layer condensing assembly and the electromagnetic crystallizer on the pouring assembly and the stretching speed of the roller, so that the quality of the casting blank is optimal and the qualification rate is higher. The whole device has strict regulation and control flow, and the preset condensation position is fed back through multiple detection so as to meet the requirements of casting blanks in different casting environments.
2. According to the invention, axial stress and radial runout are detected through the combined action of the stress detector and the amplitude detector, whether the inner wall of the pouring assembly is damaged or not is timely found according to the amplitude and stress data fluctuation in the solidification process of molten metal, for a damaged device, the positions of the inner layer condensing assembly and the outer layer condensing assembly are respectively adjusted by adjusting the screw rod sliding rail assemblies respectively connected with the inner layer condensing assembly and the outer layer condensing assembly, the positions of solidification of liquid cavities are moved by adjusting the water inflow of the outer layer condensing assembly respectively connected with the water inlet pipe and the water outlet pipe of the outer layer condensing assembly and the inner layer condensing assembly connected with the water inlet pipe and the water outlet pipe of the inner layer condensing assembly, the damaged positions are avoided, the shutdown treatment times are reduced, and the high-efficiency pouring is realized.
3. The electromagnetic crystallizer is arranged outside the outer layer condensing component, so that the upper and lower freezing points of a liquid cavity are better detected and regulated in real time; and for the detected damaged casting inner wall, adjusting the inner layer condensation component, the outer layer condensation component, the current of the electromagnetic crystallizer and the like to move the solidification position of the liquid cavity, avoiding the damaged position and realizing efficient casting.
Drawings
FIG. 1 is a flow chart of the operation of the method for adjusting the solidification point position of a liquid cavity of a large-diameter pipe according to the present invention;
FIG. 2 is a diagram showing the overall construction of the device for adjusting the solidification point position of a liquid cavity of a large-diameter pipe according to the present invention;
FIG. 3 is a semi-sectional view of a casting assembly for use in the large diameter pipe liquid pit freezing point position adjustment device of the present invention;
FIG. 4 is a block diagram of an inner layer of a casting assembly for use in the large diameter pipe liquid pit freezing point position adjustment device of the present invention;
FIG. 5 is a block diagram of a casting assembly for use in the large diameter pipe liquid pit freezing point position adjustment device of the present invention;
fig. 6 is a fitting structure diagram of a hexagonal internal thread nut used in the large-diameter pipe liquid cavity solidifying point position adjusting device.
The main reference numerals:
the casting device comprises a metal melting furnace 1, a casting component 2, a casting pipe 201, a casting component outer layer 202, a casting component inner layer 203, an electromagnetic crystallizer 3, an outer layer condensation component 4, a casting blank 5, a roller 6, a cooling liquid port 701, a cooling water jacket 702, a fixed condensation piece 703, an inner layer condensation component 8, a first screw sliding rail component 9, a bearing 901, a first screw 902, an outer layer condensation supporting frame 10, a second screw sliding rail component 11, a second screw 1101, a screw protecting cover 1102, an outer layer condensation component water inlet and outlet pipe 12, an inner layer condensation component water inlet and outlet pipe 13, a thermocouple 14, a stress detector 15, an amplitude detector 16, a six-sided internal thread nut 17 and a liquid cavity shape curve D.
Detailed Description
In order to make the technical content, the structural features, the achieved objects and the effects of the present invention more detailed, the following description will be taken in conjunction with the accompanying drawings.
According to the invention, when the same casting blank 5 is solidified, the axial length of the casting blank 5 is inconsistent due to the fact that the positions of the previous condensing assemblies are different, and the vibration frequencies caused by the different axial lengths of the casting blank 5 are different, so that the data detected by the amplitude detector 16 are compared and identified with the standard amplitude, the next procedure is carried out on the casting blank 5 which is qualified in manufacturing, the casting blank 5 which is not qualified in manufacturing is rebuilt in a furnace, and the water flow parameters or positions in the condensing assemblies are continuously adjusted until reaching standards.
Meanwhile, the position parameters of the condensing components around the casting component 2 can be adjusted according to the hardening position of molten metal, and the hardening part does not need to be stopped after hardening is generated along with the work of the machine, but only the condensing components are required to be moved by a preset distance Y (Y > damaged area) until the condensing components are moved to the end point of the other end, so that the stop time of the casting machine can be reduced, and the loss of economic cost is reduced. The method for adjusting the solidifying point position of the liquid cavity of the large-diameter pipe is realized by the following steps of as shown in fig. 1:
S1, initializing a device.
S2, respectively detecting the upper and lower solidifying point positions of the liquid cavity in the device in the casting process.
S3, detecting the damage position of the casting assembly 2 through a stress detector 15 and an amplitude detector 16 on the basis of S2, and adjusting the upper and lower freezing point positions of the liquid cavity in the device.
Specifically, the parameters of the upper and lower solidification point positions of the liquid cavity are regulated, and the parameters also comprise the stretching speed V of the roller 6 and the current i of the electromagnetic crystallizer 3, so that the casting efficiency and the quality of the casting blank 5 are improved through the combined coordination.
Further, the specific process of initializing the device in step S1 includes,
and S11, moving the electromagnetic crystallizer 3, the inner layer condensing assembly 8 and the outer layer condensing assembly 4 in the condensing assembly to a preset position of the casting assembly 2 close to the secondary condensing assembly.
S12, introducing water flow Q to the outer layer condensation assembly 4 through the water inlet and outlet pipe 12 of the outer layer condensation assembly 1 The water flow Q is introduced into the inner layer condensation assembly 8 through the water inlet and outlet pipe 13 of the inner layer condensation assembly 2 。
And S13, injecting molten metal into the casting assembly 2 by using the metal melting furnace 1, solidifying the molten metal under the combined action of the electromagnetic crystallizer 3, the inner layer condensing assembly 8 and the outer layer condensing assembly 4, gradually forming a casting blank 5 in the casting assembly 2, and finally pulling out the casting blank 5 through a roller 6 exposed in air, thereby realizing continuous casting.
Further, the specific process of detecting the position of the upper and lower freezing points of the liquid cavity in the device in the step S2 comprises,
with the water cooling of the condensing assembly, the molten metal entering the casting assembly 2 is gradually solidified into solid, and the casting blank 5 has volume change when the liquid phase is converted into the solid phase, so that vibration can be caused, and the amplitude detector 16 is larger as the distance from the solidification position x is longer; conversely, the smaller the value of x is, the smaller the amplitude is, and the size of x, namely the position of upper and lower freezing points, can be determined in real time by simulating and calculating the corresponding functional relation. Therefore, the amplitude detector 16 is started, the position of the amplitude detector 16 from the freezing point is judged according to the magnitude of the value detected by the amplitude detector 16, and a functional relation of a liquid cavity shape curve D is drawn to obtain the position of the upper and lower freezing points in the liquid cavity, wherein the expression of the liquid cavity shape curve function is as follows:
F(x)＝P 2
wherein, the curve function of the liquid cavity shape is approximately a U-shaped parabola, P is the pressure intensity of the molten metal in the casting component 2, and the specific expression is:
P＝∣J×B∣+KF
wherein J is induction current, B is magnetic current density acting on the casting component 2, K is curvature radius of the liquid cavity curved surface, and F is surface tension of the liquid cavity.
Due to the influence of the surface tension of the molten metal and the uneven heat transfer of the casting component 2, certain pressure can be generated on the molten metal cavity, the molten metal cavity can be U-shaped in the solidification process, and the molten metal cavity heat exchange expression between the molten metal cavity with lower temperature and higher temperature is shown as follows:
Wherein q b For the heat transfer between the casting member 2 and the condensing member, b=1 is the heat transfer between the casting member outer layer 202 and the outer condensing member 4, b=2 is the heat transfer between the casting member inner layer 203 and the inner condensing member 8, t 1 For the temperature of the molten metal in the casting assembly 2, the heat exchange coefficient is alpha 1 ，t 2 For condensing the temperature of the condensed water of the component, the heat exchange coefficient is alpha 2 L is the length of the casting tube 201, r 1 、r 2 The radii of the casting component outer layer 202 and the casting component inner layer 203 are respectively, lambda is the heat conductivity coefficient, and A, B is a constant.
According to the heat exchange relation between the condensed water temperature and the molten metal pit in the process method, the heat exchange expression is shown
And t 1 The expression for dynamic adjustment of the liquid cavity shape curve D function is obtained as follows, which is approximately a fixed value:
f(x)＝q b +△h
wherein q b For the heat transfer capacity of the casting module 2 and the condensing module, Δh is the difference between the freezing points.
So only t can be changed 2 Is used for regulating liquid cavity by numerical value and condensation positionControl t 2 Typically fixed, and therefore usually only Δh needs to be analyzed.
Specifically, the specific implementation steps of the detection device for the upper and lower solidifying point positions of the liquid cavity are as follows:
s21, establishing a coordinate system by using the center position of the casting component 2 away from the secondary condensation component, defining the X-axis direction along the axis direction of the casting pipe 201, setting the initial positions of the inner condensation component 8 and the outer condensation component 4 in the coordinate system as X, and setting the solidifying point position of the outer condensation component 4 as X 1 The freezing point position of the inner layer condensation module 8 is set as x 2 And setting a standard position difference delta h of the solidifying point of the liquid cavity according to casting requirements.
S22, if the amplitude detector 16 is positioned on the outer layer 202 of the casting component, the solidifying point x is detected 1 >x, the water inflow Q of the water inlet pipe 12 of the outer condensing unit is increased 1 Up to x 1 =x; if the solidifying point x detected by the amplitude detector 16 located on the outer layer 202 of the casting assembly 1 <x, the water inflow Q of the water inlet pipe 12 of the outer condensing unit is reduced 1 Up to x 1 ＝x。
If the solidifying point x detected by the amplitude detector 16 is located in the inner layer 203 of the casting assembly 2 >x, the water inflow Q of the water inlet and outlet pipe 13 of the inner condensing unit is increased 2 Up to x 2 =x; if the solidifying point x detected by the amplitude detector 16 is located in the inner layer 203 of the casting assembly 2 <x, the water inflow Q of the water inlet and outlet pipe 13 of the inner condensing assembly is reduced 2 Up to x 2 ＝x。
S23, if the amplitude detector 16 is positioned on the outer layer 202 of the casting component, the solidifying point x is detected 1 When x, the freezing point x detected by the amplitude detector 16 located on the casting component outer layer 202 is further determined 1 And the freezing point x detected by the amplitude detector 16 located in the inner layer 203 of the casting assembly 2 Is the difference of (a): if x 1 -x 2 >At Deltah, the water flow rate Q of the water inlet and outlet pipes 13 of the inner condensing assembly is reduced 2 Up to x 1 -x 2 <Δh; if x 2 -x 1 >Δh, the water flow rate of the water inlet and outlet pipes 13 of the inner condensation assembly is increasedQ 2 Up to x 2 -x 1 <△h。
Further, the main process of detecting the damaged position and adjusting the upper and lower freezing point positions in step S3 is as follows:
the solidification point is in a position which causes damage to the inner layer 203 or the outer layer 202 of the casting assembly for a long period of time, and when the casting wall is damaged, the stress detector 15 detects abnormal fluctuation, and the corresponding amplitude detector 16 detects the damaged position and the size of the damaged area.
If the casting component 2 is not damaged, and the inner layer condensation component 8 and the outer layer condensation component 4 are fixed, the upper and lower freezing point positions of the liquid cavity are respectively adjusted by adjusting the water flow of the outer layer condensation component water inlet and outlet pipe 12, the water flow of the inner layer condensation component water inlet and outlet pipe 13 and the current intensity and frequency of the electromagnetic crystallizer 3.
If the casting component 2 is damaged, the damaged position is further judged, the position of the upper and lower solidifying points of the liquid cavity is adjusted, and the specific judging process is as follows:
if the inner layer 203 of the casting assembly is damaged, the first screw slide rail assembly 9 and the second screw slide rail assembly 11 drive the outer condensing assembly 4 and the inner condensing assembly 8 to move along the X axis (X 2 - Δx), where x is assigned the newly obtained freezing point position y 2 The method comprises the steps of carrying out a first treatment on the surface of the At the freezing point x detected by the amplitude detector 16 located at the casting component outer layer 202 1 And the newly obtained solidification point x detected by the amplitude detector 16 located in the inner layer 203 of the casting assembly 2 Is the difference of (a):
if x 1 -x 2 >At Deltah, the water flow rate Q of the water inlet and outlet pipe 12 of the outer condensing unit is increased 1 Up to x 1 -x 2 <Δh; if x 2 -x 1 >Δh, the water flow rate Q of the water inlet and outlet pipe 12 of the outer condensing unit is reduced 1 Up to x 2 -x 1 <△h。
If the outer layer 202 of the casting component is damaged, the first screw slide rail component 9 and the second screw slide rail component 11 drive the outer layer condensation component 4 and the inner layer condensation component 8 to move along the X axis (X 2 - Δx), where x is assigned the newly obtained freezing point position y 1 The method comprises the steps of carrying out a first treatment on the surface of the In determining the solidification point x detected by the amplitude detector 16 located in the inner layer 203 of the casting assembly 2 And the newly obtained freezing point x detected by the amplitude detector 16 located on the casting component outer layer 202 1 Is the difference of (a):
if x 1 -x 2 >At Deltah, the water flow rate Q of the water inlet and outlet pipes 13 of the inner condensing assembly is reduced 2 Up to x 1 -x 2 <Δh; if x 2 -x 1 >Δh, the water flow rate Q of the water inlet and outlet pipes 13 of the inner condensation assembly is increased 1 Up to x 2 -x 1 <△h。
If the screw rod sliding rail component is far away from the damage position and is |x 2 -x 1 |<And in the time delta h, the upper and lower freezing point positions of the liquid cavities are respectively regulated by regulating the water flow of the outer layer condensation component water inlet and outlet pipe 12, the water flow of the inner layer condensation component water inlet and outlet pipe 13 and the current intensity and frequency of the electromagnetic crystallizer 3.
In another aspect of the invention, the device for adjusting the solidification point position of the liquid cavity of the large-diameter pipe comprises a smelting casting component, a condensing component and a secondary condensing component as shown in fig. 2. After the high-temperature treatment of the metal, the metal is melted into molten metal which is stored in the smelting furnace 1, and the smelting furnace 1 has a heat preservation function; when it is desired to perform casting of the cast slab 5, the casting pipe 201 is opened to allow the molten metal to slowly and uniformly flow into the casting assembly 2 by means of pressure and gravity. Under the action of the pulling force of the roller 6 and the pressure of the smelting furnace 1, molten metal of the casting assembly 2 slowly moves to form a preliminary casting blank 5. The device monitors the solidification point of the liquid pit of the molten metal converted into the molten metal in real time, as shown in fig. 3, and regulates and controls the stretching speed of the inner layer condensation component 8, the outer layer condensation component 4, the electromagnetic crystallizer 3 and the roller 6 to change the position of the solidification point of the liquid pit, thereby improving the quality and performance of the casting blank 5.
The smelting casting assembly comprises a smelting furnace 1 and a casting assembly 2, wherein the smelting furnace 1 is arranged above a left support table in the device, an inverted hole is formed in the output end of the smelting furnace 1, the inverted hole is connected with the input end of a casting pipe 201 in the casting assembly 2, the casting assembly 2 is fixed by adopting a support, the smelting casting assembly comprises the casting pipe 201, a casting assembly outer layer 202 and a casting assembly inner layer 203, the output end of the casting pipe 201 is connected with the input end of the casting assembly outer layer 202, the smelting furnace 1, the casting pipe 201 and the casting assembly outer layer 202 are fixed by welding, the casting assembly outer layer 202 and the casting assembly inner layer 203 are coaxially arranged, a casting blank cavity is formed between the casting assembly outer layer 202 and the casting assembly inner layer 203, and a casting blank 5 is positioned in the casting blank cavity.
The condensation subassembly, it includes electromagnetic crystallizer 3, outer condensation subassembly 4, inlayer condensation subassembly 8, outer condensation subassembly business turn over water pipe 12, outer condensation support frame 10, inlayer condensation subassembly business turn over water pipe 13, first lead screw slide rail assembly 9 and second lead screw slide rail assembly 11, outer condensation subassembly 4 and inlayer condensation subassembly 8 belong to primary cooling, electromagnetic crystallizer 3 sets up to movable, can control axial displacement along with outer condensation subassembly 4, also can control the fine setting independently. The first installation end of the outer layer condensation component 4 is connected with the first installation end of the outer wall of the casting component outer layer 202, the electromagnetic crystallizer 3 is enveloped at the second installation end of the outer layer condensation component 4, the inner layer condensation component 8 is connected with the installation end of the inner wall of the casting component inner layer 203, the tracks are respectively arranged on the outer wall of the casting component outer layer 202 and the inner wall of the casting component inner layer 203, the outer layer condensation component 4 and the inner layer condensation component 8 are convenient to move left and right axially, the input ends of the outer layer condensation component 4 and the inner layer condensation component 8 are respectively connected with the outer layer condensation component water inlet and outlet pipe 12 and the inner layer condensation component water inlet and outlet pipe 13, the first lead screw sliding rail component 9 is in threaded connection with the third installation end of the outer layer condensation component 4 through the outer layer condensation supporting frame 10, and the second lead screw sliding rail component 11 is in threaded connection with the second installation end of the inner layer condensation component 8 through the six-side internal thread nuts 17 as shown in fig. 3.
Specifically, as shown in fig. 1, the first screw slide rail assembly 9 includes a bearing 901 and a first screw 902, and the first motor is connected to an input end of the first screw 902 through the bearing 901. As shown in fig. 3, the second screw slide rail assembly 11 includes a second screw 1101 and a screw protecting cover 1102, the second screw 1101 is located inside the screw protecting cover 1102, and an input end of the second screw 1101 is connected to a second motor.
The secondary condensation assembly is exposed in the air and comprises a cooling liquid port 701, a cooling water jacket 702 and a fixed condensation piece 703, wherein the cooling water jacket 702 and the fixed condensation piece 703 are respectively connected with a second installation end and a third installation end of the outer wall of the casting assembly outer layer 202, the cooling liquid port 701 and a roller 6 are positioned on the same side, the cooling water jacket 702 is positioned on one side close to the output end of the casting assembly 2, the inner layer of the cooling water jacket 702 is in direct contact with the casting blank 5 and cools the casting blank 5, an infrared temperature detector is installed around the outer layer of the cooling water jacket 702, and the temperature of the casting blank 5 is detected and forms a feedback system.
As shown in fig. 4 and 5, the device further comprises a thermocouple 14, a roller 6, a stress detector 15 and an amplitude detector 16, wherein the thermocouple 14 is uniformly arranged on the inner wall of the inner layer 203 of the casting component along the axis of the inner layer 203 of the casting component, so as to realize temperature measurement, ensure that the temperature of the casting blank 5 when being stretched to be lower than 100 ℃ when being exposed to air, the stress detector 15 and the amplitude detector 16 are respectively and uniformly distributed on the outer wall of the outer layer 202 of the casting component and one end, close to the metal liquid, of the inner wall of the inner layer 203 of the casting component along the circumferential direction, and the roller 6 is positioned at the output end of the casting blank cavity.
The amplitude detector 16, the stress detector 15, the outer layer condensing assembly water inlet and outlet pipe 12 and the inner layer condensing assembly water inlet and outlet pipe 13 are all wrapped with high-temperature resistant heat insulation materials.
As shown in fig. 6, a hexagonal through hole is formed in the inner layer condensation assembly 8 in the axial direction, a hexagonal internal thread nut 17 penetrates through the whole inner layer condensation assembly 8, the hexagonal internal thread nut 17 and a second screw 1101 are meshed with each other, the periphery of the inner layer condensation assembly 8 is radially fixed through a key, when a second motor rotates, left-right axial movement of the inner layer condensation assembly 8 is realized through cooperation of the second screw 1101 and the hexagonal internal thread nut 17, and the purpose of stage condensation is realized.
The method and the device for adjusting the solidifying point position of the liquid cavity of the large-diameter pipe are further described by combining the following embodiments:
the main working process of the adjusting method of the invention is as follows:
s1, initializing a device.
And S11, moving the electromagnetic crystallizer 3, the inner layer condensing assembly 8 and the outer layer condensing assembly 4 in the condensing assembly to a preset position of the casting assembly 2 close to the secondary condensing assembly.
S12, introducing water flow Q to the outer layer condensation assembly 4 through the water inlet and outlet pipe 12 of the outer layer condensation assembly 1 The water flow Q is introduced into the inner layer condensation assembly 8 through the water inlet and outlet pipe 13 of the inner layer condensation assembly 2 。
And S13, injecting molten metal into the casting assembly 2 by using the metal melting furnace 1, solidifying the molten metal under the combined action of the electromagnetic crystallizer 3, the inner layer condensing assembly 8 and the outer layer condensing assembly 4, gradually forming a casting blank 5 in the casting assembly 2, and finally pulling out the casting blank 5 through a roller 6 exposed in air, thereby realizing continuous casting.
S2, respectively detecting the upper and lower solidifying point positions of a liquid cavity in the device in the casting process: the amplitude detector 16 is started, the position of the amplitude detector 16 from the freezing point is judged according to the magnitude of the value detected by the amplitude detector 16, and the position of the upper and lower freezing points in the liquid cavity is obtained by drawing the functional relation of the liquid cavity shape curve D.
In a preferred embodiment of the invention, a fluent module in ansys is adopted to carry out finite element simulation treatment on molten metal entering the casting assembly 2, firstly, the effective width of a casting cavity in the casting assembly 2 is set to be 30mm, the effective thickness of a simulated casting blank 5 is set to be 30mm, the inner diameter of the casting blank 5 is set to be 300mm, and the length of the casting blank 5 is set to be 1000mm; the casting component 2 is made of refractory material and has good heat conductivity; the casting member outer layer 202 and the casting member inner layer 203 are respectively supplied with condensed water at a constant flow rate v and a constant temperature t to cool the molten metal inside, with the boundary condition that both ends of the casting member 2 in the axial direction and the width of the cast slab 5 are defined at 30mm. As a result of simulation, the upper and lower parts of the molten metal cavity are quickly coagulated, and the middle part is slowly coagulated, so that the molten metal cavity is approximately V-shaped. The condensation position of the molten metal cavity can be adjusted by adjusting the positions of the outer layer condensation component 4 and the inner layer condensation component 8 and the water flow quantity, so that the performance of the metal pipe is improved.
Specifically, when the liquid cavity curve of the casting assembly 2 is detected, the screw rod sliding rail assembly should not be too fast in the moving process, and enough detection time is required for the detector to ensure the accuracy of the experiment.
S21, establishing a coordinate system by using the center position of the casting component 2 away from the secondary condensation component, defining the X-axis direction along the axis direction of the casting pipe 201, setting the initial positions of the inner condensation component 8 and the outer condensation component 4 in the coordinate system as X, and setting the solidifying point position of the outer condensation component 4 as X 1 The freezing point position of the inner layer condensation module 8 is set as x 2 And setting a standard position difference delta h of the solidifying point of the liquid cavity according to casting requirements.
S22, if the amplitude detector 16 positioned on the outer layer 202 of the casting component detects the solidifying point x of the liquid cavity on the casting blank 5 1 >x, the water inflow Q of the water inlet pipe 12 of the outer condensing unit is increased 1 Up to x 1 =x; if the amplitude detector 16 positioned on the outer layer 202 of the casting component detects the solidification point x of the liquid cavity on the casting blank 5 1 <x, the water inflow Q of the water inlet pipe 12 of the outer condensing unit is reduced 1 Up to x 1 ＝x。
If the amplitude detector 16 positioned in the inner layer 203 of the casting assembly detects the solidification point x of the liquid cavity on the casting blank 5 2 >x, the water inflow Q of the water inlet and outlet pipe 13 of the inner condensing unit is increased 2 Up to x 2 =x; if the amplitude detector 16 positioned in the inner layer 203 of the casting assembly detects the solidification point x of the liquid cavity on the casting blank 5 2 <x, the water inflow Q of the water inlet and outlet pipe 13 of the inner condensing assembly is reduced 2 Up to x 2 ＝x。
The axial movement adjustment of the inner condensation assembly 8 and the outer condensation assembly 4 is transmitted through the second screw slide rail assembly 11 and the first screw slide rail assembly 9 respectively.
S23, if the amplitude detector 16 is positioned on the outer layer 202 of the casting component, the solidifying point x is detected 1 When x, the freezing point x detected by the amplitude detector 16 located on the casting component outer layer 202 is further determined 1 And the freezing point x detected by the amplitude detector 16 located in the inner layer 203 of the casting assembly 2 Is the difference of (a): if x 1 -x 2 >At Deltah, the water flow rate Q of the water inlet and outlet pipes 13 of the inner condensing assembly is reduced 2 Up to x 1 -x 2 <Δh; if x 2 -x 1 >At Deltah, the water flow rate Q of the water inlet and outlet pipes 13 of the inner condensing assembly is increased 2 Up to x 2 -x 1 <△h。
S3, as casting proceeds, the inner casting component layer 203 or the outer casting component layer 202 in the casting component 2 is damaged, so that the quality of the casting blank 5 is affected; the damaged position and damaged area of the casting component outer layer 202 or the casting component inner layer 203 are detected by the stress detector 15, and the position of the upper and lower solidification points of the liquid cavity in the device is adjusted.
If the casting component 2 is not damaged, and the inner layer condensation component 8 and the outer layer condensation component 4 are fixed, the upper and lower freezing point positions of the liquid cavity are respectively adjusted by adjusting the water flow of the outer layer condensation component water inlet and outlet pipe 12, the water flow of the inner layer condensation component water inlet and outlet pipe 13 and the current intensity and frequency of the electromagnetic crystallizer 3.
If the casting component 2 is damaged, the damaged position is further judged, the position of the upper and lower solidifying points of the liquid cavity is adjusted, and the specific judging process is as follows:
if the inner layer 203 of the casting assembly is damaged, the first screw slide rail assembly 9 and the second screw slide rail assembly 11 drive the outer condensing assembly 4 and the inner condensing assembly 8 to move along the X axis respectively (y=x 2 - Δx), progressively moving the condensation assembly until it has moved to a defined position, such that its condensation position avoids the damaged area, assigning x to the newly obtained freezing point position y 2 The method comprises the steps of carrying out a first treatment on the surface of the At the freezing point x detected by the amplitude detector 16 located at the casting component outer layer 202 1 And the newly obtained solidification point x detected by the amplitude detector 16 located in the inner layer 203 of the casting assembly 2 Is the difference of (a):
if x 1 -x 2 >At Deltah, the water flow rate Q of the water inlet and outlet pipe 12 of the outer condensing unit is increased 1 Up to x 1 -x 2 <Δh; if x 2 -x 1 >Δh, the water flow rate Q of the water inlet and outlet pipe 12 of the outer condensing unit is reduced 1 Up to x 2 -x 1 <△h。
If the outer layer 202 of the casting component is damaged, the first wires are respectively passed throughThe lever sliding rail assembly 9 and the second screw sliding rail assembly 11 drive the outer condensing assembly 4 and the inner condensing assembly 8 to move along the X axis respectively (y=x 2 - Δx), where x is assigned the newly obtained freezing point position y 1 The method comprises the steps of carrying out a first treatment on the surface of the In determining the solidification point x detected by the amplitude detector 16 located in the inner layer 203 of the casting assembly 2 And the newly obtained freezing point x detected by the amplitude detector 16 located on the casting component outer layer 202 1 Is the difference of (a):
if x 1 -x 2 >At Deltah, the water flow rate Q of the water inlet and outlet pipes 13 of the inner condensing assembly is reduced 2 Up to x 1 -x 2 <Δh; if x 2 -x 1 >Δh, the water flow rate Q of the water inlet and outlet pipes 13 of the inner condensation assembly is increased 1 Up to x 2 -x 1 <△h。
And (3) carrying out secondary cooling on the casting blank 5: after the condensation position, the flow rate of the condensate water and the position of the electromagnetic crystallizer 3 are determined, the continuously cast casting blank 5 is pulled out through the roller 6, the casting blank 5 is cooled through the secondary cooling assembly, an infrared temperature detector on the cooling water jacket 702 detects the temperature of the pulled casting blank 5, if the temperature of the casting blank 5 is higher than 100 ℃, the flow rate of the condensate water jacket 702 is increased or the temperature of the condensate water is reduced until the temperature of the casting blank 5 is lower than 100 ℃, and the subsequent detection and the carrying are facilitated.
Compared with the traditional casting device, the movable condensation component is added on the casting component 2 to control the position of the solidifying point of the molten metal pit; the amplitude detector 16, the thermocouple 14 and the stress detector 15 can be used for jointly acting with the outer layer condensation component 4 and the inner layer condensation component 8 to detect and control the position of the solidification point of the liquid cavity, so that the quality of the casting blank 5 is improved. The invention solves the defect of overlarge difference of the difference Deltah between the solidification positions of the inner layer and the outer layer of the liquid cavity in the current casting blank casting, and simultaneously dynamically monitors and adjusts the position of the solidification point of the liquid cavity to improve the performance of the casting blank 5.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (9)
1. The method for adjusting the solidifying point position of the liquid cavity of the large-diameter pipe is characterized by comprising the following specific implementation steps:
s1, initializing a device;
s2, respectively detecting the positions of a freezing point and a lower freezing point on a liquid cavity in the device in the casting process: starting an amplitude detector, judging the positions of the amplitude detector from an upper freezing point and a lower freezing point according to the magnitude of the values detected by the amplitude detector, and obtaining a liquid cavity shape curve function relation to obtain the positions of the upper freezing point and the lower freezing point in the liquid cavity, wherein the expression of the liquid cavity shape curve function relation is as follows:
F(x)＝P 2
Wherein P is the pressure intensity of molten metal in the casting assembly, and the specific expression is:
P＝∣J×B∣+KF
wherein J is induction current, B is magnetic current density acting on the casting component, K is curvature radius of the liquid cavity curved surface, and F is surface tension of the liquid cavity;
according to the heat exchange relation between the condensed water temperature and the liquid pit, the expression for dynamically adjusting the liquid pit shape curve function is obtained as follows:
f(x)＝q b +△h
wherein q b For the heat transfer capacity of the casting assembly and the condensing assembly, Δh is the difference between the freezing points;
s3, detecting the damage condition of the casting assembly through a stress detector and an amplitude detector, and adjusting the positions of a freezing point and a lower freezing point on a liquid cavity in the device:
if the casting component is in the first state, and the inner layer condensation component and the outer layer condensation component are fixed, the upper and lower solidifying point positions of the liquid cavity are respectively adjusted by adjusting the water flow of the water inlet and outlet pipes of the outer layer condensation component, the water flow of the water inlet and outlet pipes of the inner layer condensation component and the current intensity and frequency of the electromagnetic crystallizer;
if the casting component is in the second state, further judging the damaged position and adjusting the positions of the upper solidifying point and the lower solidifying point of the liquid cavity:
if the inner layer of the casting component is damaged, the first screw rod sliding rail component and the second screw rod sliding rail component drive the outer layer condensation component and the inner layer condensation component to move along the X axis by Y distance respectively, namely Y=x 2 Syndrome of deficiency the x-ray number of the optical fiber is, wherein x is 2 For the determined position of the inner layer solidification point before damage, deltax is the damaged length of the casting component, and the newly obtained solidification point position y is assigned to x 2 The method comprises the steps of carrying out a first treatment on the surface of the Then judging the solidifying point x detected by the amplitude detector positioned on the outer layer of the casting component 1 And the newly obtained solidification point x detected by the amplitude detector positioned in the inner layer of the casting assembly 2 Is a difference in (2);
if the outer layer of the casting component is damaged, the first screw rod sliding rail component and the second screw rod sliding rail component drive the outer layer condensation component and the inner layer condensation component to move along the X axis by Y distance respectively, namely Y=x 1 Syndrome of deficiency the x-ray number of the optical fiber is, wherein x is 1 For the determined position of the solidification point of the outer layer before damage, deltax is the length of damage to the casting component, and the newly obtained position y of the solidification point is assigned to x 1 The method comprises the steps of carrying out a first treatment on the surface of the In determining the solidifying point x detected by an amplitude detector located in the inner layer of the casting assembly 2 And the newly obtained solidification point x detected by an amplitude detector positioned on the outer layer of the casting component 1 Is a difference in (c).
2. The method for adjusting the solidification point position of the liquid cavity of the large-diameter pipe according to claim 1, wherein the specific operation process of the initializing device in the step S1 is as follows:
s11, moving an electromagnetic crystallizer, an inner layer condensing assembly and an outer layer condensing assembly in the condensing assembly to a preset position of a casting assembly, which is close to a secondary condensing assembly;
S12, introducing water flow Q into the outer layer condensing assembly through the water inlet and outlet pipe of the outer layer condensing assembly 1 The water flow Q is introduced into the inner layer condensation assembly through the water inlet and outlet pipe of the inner layer condensation assembly 2 ；
And S13, injecting molten metal into the casting component by utilizing a metal melting furnace, solidifying the molten metal under the combined action of the electromagnetic crystallizer, the inner layer condensing component and the outer layer condensing component, and gradually forming a casting blank in the casting component.
3. The method for adjusting the position of the solidification point of the liquid cavity of the large-diameter pipe according to claim 1, wherein the specific operation procedure of the detection device in the step S2 is as follows:
s21, establishing a coordinate system by using the center position of the casting component far away from the secondary condensation component, defining the X-axis direction along the axis direction of the casting pipe, respectively setting the initial positions of the inner condensation component and the outer condensation component as X, and setting the solidifying point position of the outer condensation component as X 1 The freezing point position of the inner layer condensation component is set as x 2 Setting a standard position difference delta h of a liquid cavity solidifying point according to casting requirements;
s22, if the amplitude detector positioned on the outer layer of the casting component detects the solidifying point x 1 >x, the water inflow Q of the water inlet pipe and the water outlet pipe of the outer condensing assembly is increased 1 Up to x 1 =x; if the solidifying point x detected by the amplitude detector is positioned on the outer layer of the casting component 1 <x, the water inflow Q of the water inlet and outlet pipes of the outer condensing assembly is reduced 1 Up to x 1 ＝x；
If the solidifying point x detected by the amplitude detector positioned in the inner layer of the casting component 2 >x, the water inflow Q of the water inlet and outlet pipes of the inner condensing assembly is increased 2 Up to x 2 =x; if the solidifying point x detected by the amplitude detector positioned in the inner layer of the casting component 2 <x, the water inflow Q of the water inlet and outlet pipes of the inner condensation assembly is reduced 2 Up to x 2 ＝x；
S23, if the amplitude detector positioned on the outer layer of the casting component detects the solidifying point x 1 When x, the solidifying point x detected by the amplitude detector positioned on the outer layer of the casting component is further judged 1 And a freezing point x detected by an amplitude detector located in the inner layer of the casting assembly 2 Is the difference of (a): if x 1 -x 2 >At delta h, the water flow rate Q of the water inlet and outlet pipes of the inner layer condensation assembly is reduced 2 Until |x 1 -x 2 |<Δh; if x 2 -x 1 >Δh, the water flow rate Q of the water inlet and outlet pipes of the inner layer condensation assembly is increased 2 Until |x 2 -x 1 |<△h。
4. The method for adjusting the solidification point position of a liquid cavity for a large-diameter pipe according to claim 1, wherein when the inner layer of the casting assembly is damaged, x is determined 1 And x 2 The specific process of the difference value is as follows: if x 1 -x 2 >At delta h, the water flow Q of the water inlet and outlet pipes of the outer condensing assembly is increased 1 Up to x 1 -x 2 <Δh; if x 2 -x 1 >Δh, the water flow Q of the water inlet and outlet pipes of the outer layer condensing assembly is reduced 1 Up to x 2 -x 1 <△h。
5. The method for adjusting the solidification point position of a liquid cavity for a large-diameter pipe according to claim 1, wherein when the outer layer of the casting component is damaged, x is determined 1 And x 2 The specific process of the difference value is as follows: if x 1 -x 2 >At delta h, the water flow rate Q of the water inlet and outlet pipes of the inner layer condensation assembly is reduced 2 Up to x 1 -x 2 <Δh; if x 2 -x 1 >Δh, the water flow rate Q of the water inlet and outlet pipes of the inner layer condensation assembly is increased 1 Up to x 2 -x 1 <△h。
6. The method for adjusting the position of the solidification point of a liquid cavity for a large-diameter pipe according to claim 1, 4 or 5, wherein in the step S3, parameters of the position of the solidification point above and below the liquid cavity are adjusted, and further comprising adjusting the drawing speed V of the roll and the current i of the electromagnetic crystallizer.
7. An adjusting device for a large diameter pipe liquid pit solidifying point position adjusting method according to one of claims 1 to 6, comprising a smelting casting module and a condensing module, characterized in that,
the smelting casting assembly comprises a smelting furnace and a casting assembly, wherein the output end of the smelting furnace is connected with the input end of a casting pipe in the casting assembly, the casting assembly comprises a casting pipe, an outer casting assembly layer and an inner casting assembly layer, the output end of the casting pipe is connected with the input end of the outer casting assembly layer, the outer casting assembly layer and the inner casting assembly layer are coaxially arranged, a casting blank cavity is formed between the outer casting assembly layer and the inner casting assembly layer, and a casting blank is positioned in the casting blank cavity;
The condensing assembly comprises an electromagnetic crystallizer, an outer layer condensing assembly, an inner layer condensing assembly, an outer layer condensing assembly water inlet and outlet pipe, an outer layer condensing support frame, an inner layer condensing assembly water inlet and outlet pipe, a first screw rod sliding rail assembly and a second screw rod sliding rail assembly, wherein a first installation end of the outer layer condensing assembly is connected with a first installation end of the outer wall of the casting assembly, the electromagnetic crystallizer is enveloped at a second installation end of the outer layer condensing assembly, the inner layer condensing assembly is connected with an installation end of the inner wall of the inner layer of the casting assembly, the input ends of the outer layer condensing assembly and the inner layer condensing assembly are respectively connected with the outer layer condensing assembly water inlet and outlet pipe and the inner layer condensing assembly water inlet and outlet pipe, the first screw rod sliding rail assembly is connected with a third installation end of the outer layer condensing assembly through the outer layer condensing support frame, and the second screw rod sliding rail assembly is connected with a second installation end of the inner layer condensing assembly through a six-side inner screw nut; the first screw rod sliding rail assembly comprises a bearing and a first screw rod, and the first motor is connected with the input end of the first screw rod through the bearing; the second lead screw sliding rail assembly comprises a second lead screw and a lead screw protection cover, the second lead screw is positioned in the lead screw protection cover, and the input end of the second lead screw is connected with a second motor.
8. The apparatus according to claim 7, further comprising a secondary condensing unit including a cooling fluid port, a cooling water jacket and a fixed condensing member, the cooling water jacket and the fixed condensing member being respectively connected to a second mounting end and a third mounting end of an outer wall of an outer layer of the casting unit, the cooling fluid port and the roller being located on the same side.
9. The device for adjusting the position of the solidification point of the liquid cavity of the large-diameter pipe according to claim 7, further comprising thermocouples, rollers, stress detectors and amplitude detectors, wherein the thermocouples are uniformly arranged on the inner wall of the inner layer of the casting assembly along the axis of the inner layer of the casting assembly, the stress detectors and the amplitude detectors are alternately uniformly distributed on the outer wall of the outer layer of the casting assembly and one end, close to the input metal liquid, of the inner wall of the inner layer of the casting assembly along the circumferential direction, and the rollers are positioned at the output end of the casting blank cavity.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117470617A (en) * | 2023-12-28 | 2024-01-30 | 中铝材料应用研究院有限公司 | Method for determining shape and position of solidification front in casting process of aluminum alloy |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003103351A (en) * | 2001-09-26 | 2003-04-08 | Nkk Corp | Manufacturing method for continuous casting ingot |
| CN1843660A (en) * | 2006-04-21 | 2006-10-11 | 台山市金桥铝型材厂有限公司 | Method for casting hollow rod billet by inner-hole anhydrous cooling and rod cast thereby |
| JP2008238256A (en) * | 2007-03-29 | 2008-10-09 | Jfe Steel Kk | Method for producing continuously cast slab and continuous caster |
| EP3437756A1 (en) * | 2017-08-04 | 2019-02-06 | Primetals Technologies Austria GmbH | Continuous casting of a metallic strand |
| CN114472820A (en) * | 2021-12-09 | 2022-05-13 | 广西南南铝加工有限公司 | Preparation method and device of cast ingot for high-toughness high-corrosion-resistance aluminum alloy thick plate |
| CN114682750A (en) * | 2022-04-01 | 2022-07-01 | 燕山大学 | Method and device for casting pipe |
| CN115194111A (en) * | 2022-07-21 | 2022-10-18 | 武汉大西洋连铸设备工程有限责任公司 | Semi-continuous casting vertical casting process and equipment for large round billet to extra-large round billet |
-
2022
- 2022-12-23 CN CN202211666608.9A patent/CN116079026B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003103351A (en) * | 2001-09-26 | 2003-04-08 | Nkk Corp | Manufacturing method for continuous casting ingot |
| CN1843660A (en) * | 2006-04-21 | 2006-10-11 | 台山市金桥铝型材厂有限公司 | Method for casting hollow rod billet by inner-hole anhydrous cooling and rod cast thereby |
| JP2008238256A (en) * | 2007-03-29 | 2008-10-09 | Jfe Steel Kk | Method for producing continuously cast slab and continuous caster |
| EP3437756A1 (en) * | 2017-08-04 | 2019-02-06 | Primetals Technologies Austria GmbH | Continuous casting of a metallic strand |
| CN114472820A (en) * | 2021-12-09 | 2022-05-13 | 广西南南铝加工有限公司 | Preparation method and device of cast ingot for high-toughness high-corrosion-resistance aluminum alloy thick plate |
| CN114682750A (en) * | 2022-04-01 | 2022-07-01 | 燕山大学 | Method and device for casting pipe |
| CN115194111A (en) * | 2022-07-21 | 2022-10-18 | 武汉大西洋连铸设备工程有限责任公司 | Semi-continuous casting vertical casting process and equipment for large round billet to extra-large round billet |
Non-Patent Citations (1)
| Title |
|---|
| 韩至成,周土平,丁宝利: "电磁铸造实验和数值模拟", 北方工业大学学报, no. 03, pages 841 - 844 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117470617A (en) * | 2023-12-28 | 2024-01-30 | 中铝材料应用研究院有限公司 | Method for determining shape and position of solidification front in casting process of aluminum alloy |
| CN117470617B (en) * | 2023-12-28 | 2024-03-12 | 中铝材料应用研究院有限公司 | Method for determining shape and position of solidification front in casting process of aluminum alloy |
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