Continuous casting machine edge secondary cooling nozzle self-adaptive control device and control method thereof

Abstract

The invention relates to the technical field of metallurgical equipment, and discloses a continuous casting machine edge secondary cooling nozzle self-adaptive control device which comprises two spraying devices, each spraying device comprises two vertical guide columns, each guide column is sleeved with a sleeve, the sleeves are controlled to ascend and descend through a lifting system, a mounting block is connected between the two sleeves, and the mounting blocks are connected with the guide columns through a lifting system. A movable block is arranged in the mounting block, a nozzle facing the casting blank is arranged on the movable block, a connecting rod is arranged on the other face of the movable block, the guide rods are sleeved with the two ends of the connecting rod through sleeves, and the movable block reciprocates through a horizontal telescopic system arranged on the mounting block. The invention further discloses a control method of the self-adaptive control device for the edge secondary cooling nozzles of the continuous casting machine. According to the self-adaptive control device and method for the secondary cooling nozzle on the edge of the continuous casting machine, self-adaptive control over the distance and angle of the nozzle under the condition that the width of a casting blank changes is achieved, the good narrow face cooling effect is guaranteed, and transverse and longitudinal cracks are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical equipment, and in particular to an adaptive control device for a secondary cooling nozzle at an edge of a continuous casting machine and a control method thereof. Background Art

[0002] Corner transverse cracks of ingots have always been a quality problem that has troubled domestic and foreign steel mills. Once a corner transverse crack occurs, it will lead to an increase in the amount of ingot cleaning and a decrease in the yield of steel products. At present, there are generally two technological ideas for solving corner transverse cracks of slabs: one is to control the surface temperature of the slab during bending and straightening by "hot running" or "cold running" to avoid the high temperature brittle range of steel; the other is to control the surface microstructure of the slab to form a layer of organization with strong crack resistance, which is not easy to crack, but these two technologies are not very mature.

[0003] In the early stage, some enterprises conducted a series of tests based on the "cold line" control idea, that is, by adding nozzles to the narrow surface of the billet, the cooling efficiency of the narrow surface was accelerated. The results showed that this method can indeed effectively reduce the occurrence of transverse cracks at the corners of the slab. However, in actual production, due to the continuous change of the billet width, the distance between the nozzle and the narrow surface of the billet will change when the nozzle is fixed, resulting in poor cooling effect, which will increase the probability of cracks to a certain extent. It is precisely for this reason that the narrow surface cooling technology of the billet has not been able to break through. Therefore, it is urgent to develop an adaptive control device and control method for the secondary cooling nozzle at the edge of the continuous casting machine to achieve adaptive control of the nozzle distance and angle under the condition of billet width changes, ensure good narrow surface cooling effect, thereby reducing the occurrence of transverse and longitudinal cracks and improving the quality of billet products.

[0004] A Chinese patent (publication date: December 21, 2011, publication number: CN102284687A) discloses an automatic cleaning and maintenance method for continuous casting secondary cooling nozzles. When the system reaches the cleaning condition, the field controller sends a start signal to each electromagnetic distributor, and the electromagnetic valves inside the electromagnetic distributor are started in sequence. When the electromagnetic valve corresponding to a group of nozzles is started, compressed air enters the compressed air control pipeline on the upper part of the nozzle, and the compressed air control pipeline is exhausted. The piston moves upward to lift the guide core, and the atomizing gas is cut off at the same time. , the distance between the lower part of the guide core and the isolation plate is pulled to 3mm, and the pressurized water flow instantly washes away the impurities. This process lasts for 2-5 seconds; after cleaning, the solenoid valve is closed, and compressed air enters the compressed air control pipeline. The compressed air control pipeline is exhausted, and the piston moves down to press the lower part of the guide core against the isolation plate, and the nozzle enters the normal atomization state. The advantage is that it solves the serious blockage problem of the secondary cooling nozzle and improves the cooling effect of the casting. At the same time, the nozzle spray characteristic parameters meet the process requirements, but the device is only used for cleaning and maintenance of the secondary cooling nozzle.

[0005] A Chinese patent (publication date: January 4, 2012, publication number: CN102303107A) discloses a water flow density measurement system for a secondary cooling nozzle of a slab continuous casting machine, which at least includes a nozzle moving mechanism, a nozzle, a signal conditioner, a computer data acquisition and analysis unit, a water collector and a sensor moving mechanism. The water collector is fixed on the sensor moving mechanism, and the water collector is driven to move to a detection position by the sensor moving mechanism; the nozzle is fixed on the nozzle moving mechanism, the nozzle is downward, and the nozzle is moved to the top of the water collector by the nozzle moving mechanism, and the nozzle sprays water. The liquid level sensor in the water collector gives the density of water spraying in different spaces, and the signal is amplified and processed by the signal conditioner and then output to the computer data acquisition and analysis unit to give a three-dimensional water spray density distribution map. It has accurate measurement, short measurement time and low measurement cost, but the system is mainly used to perform physical tests on nozzle characteristics and cannot be used in production sites.

[0006] A Chinese patent (publication date: May 28, 2008, publication number: CN101187618A) discloses a method for arranging secondary cooling nozzles for a straight arc slab continuous casting machine, wherein the arrangement is as follows: three secondary cooling nozzles are arranged in the width direction of the curved section and the arc section of the continuous casting machine, the secondary cooling nozzles are arranged symmetrically with respect to the width center of the slab, and the nozzle interval is 600mm to 900mm; two secondary cooling nozzles are arranged in the width direction of the straightening section of the continuous casting machine, the nozzles are arranged symmetrically with respect to the width center of the slab, and the secondary cooling nozzle interval is 400mm to 600mm. The secondary cooling nozzles are ordinary continuous casting aerosol nozzles, and the spray angle is 90° to 130°. The advantages of this method are that the excessive stress caused by uneven temperature across the width of the casting is effectively improved, the surface quality of the casting is improved, and the method has wide applicability. However, this arrangement method cannot meet the demand for cooling the narrow surface of the slab. Summary of the invention

[0007] The purpose of the present invention is to address the deficiencies of the above-mentioned technology and to provide an adaptive control device and a control method for the secondary cooling nozzle at the edge of a continuous casting machine, so as to realize adaptive control of the nozzle distance and angle under the condition of changing width of the ingot, ensure good cooling effect of the narrow surface, and reduce the occurrence of transverse and longitudinal cracks.

[0008] To achieve the above-mentioned purpose, the adaptive control device of the secondary cooling nozzle at the edge of the continuous casting machine involved in the present invention includes two spray devices, which are symmetrically arranged on both sides of the continuous casting machine with the width center line of the ingot as the center, and each of the spray devices includes two vertical guide columns, each of which is sleeved with a sleeve, and the sleeve is controlled to rise and fall by a lifting system, and a mounting block is connected between the two sleeves. The mounting block is hollow on the side facing the ingot, and a movable block parallel to the mounting block is arranged inside, and a plurality of nozzles facing the ingot are arranged on the movable block, and at least two vertical connecting rods are arranged on the other side of the movable block, and both ends of the connecting rod are sleeved on the guide rod through a sleeve, one end of the guide rod is fixed to the inner wall of the mounting block, and the other end faces the ingot, and the movable block moves back and forth through a horizontal telescopic system arranged on the mounting block.

[0009] Preferably, the lifting system is provided with a displacement sensor for detecting the displacement of the sleeve, the mounting block is provided with a fixed frame, the fixed frame is provided with a transverse movement system, a mechanical probe is installed on the movable side of the transverse movement system, the mechanical probe moves toward the ingot through the transverse movement system, the mechanical probe is provided with a rangefinder and a pressure sensor, and the horizontal telescopic system is provided with a displacement detection device for detecting the displacement of the movable block.

[0010] Preferably, the nozzle is connected to a pressure and flow detection and control system, and the pressure and flow detection and control system is connected to a medium pipe.

[0011] Preferably, both ends of the guide column are fixedly mounted via a mounting plate.

[0012] Preferably, the outer shape of the mounting block corresponds to the shape of the casting billet.

[0013] Preferably, the nozzles are of equal height.

[0014] A control method for an adaptive control device for a secondary cooling nozzle at the edge of a continuous casting machine comprises the following steps:

[0015] A) After receiving the "start casting" instruction, the continuous casting roller of the continuous casting machine rotates and drives the billet to move, and the optimal distance between the nozzle and the end face of the billet is obtained in combination with the steel grade information;

[0016] B) obtaining the casting thickness of the ingot and the height of the center line of the nozzle from the lower roller surface, and adjusting the lifting system so that the height of the center line of the nozzle from the lower roller surface is half of the casting thickness of the ingot;

[0017] C) controlling the left and right horizontal telescopic systems to move toward the direction of the billet so that the distance between the nozzle and the end surface of the billet is the optimal distance obtained in step A);

[0018] D) The nozzle continuously sprays the narrow side of the ingot;

[0019] E) After casting is completed, the left and right horizontal telescopic systems are controlled to move away from the ingot and return to the initial position.

[0020] Preferably, the lifting system is provided with a displacement sensor for detecting the displacement of the sleeve, the mounting block is provided with a fixed frame, the fixed frame is provided with a transverse movement system, a mechanical probe is installed on the movable side of the transverse movement system, the mechanical probe moves toward the ingot through the transverse movement system, a rangefinder and a pressure sensor are provided on the mechanical probe, and the horizontal telescopic system is provided with a displacement detection device for detecting the displacement of the movable block, and the control comprises the following steps:

[0021] A) After receiving the "start casting" instruction, the continuous casting roller of the continuous casting machine rotates and drives the billet to move, and the optimal distance c between the nozzle and the end face of the billet is obtained in combination with the steel grade information;

[0022] B) Obtain the casting thickness h of the ingot, and use a displacement sensor to obtain the height a of the nozzle center line from the lower roller surface. When it is checked that a≠h / 2, adjust the lifting system so that the height a of the nozzle center line from the lower roller surface is half of the casting thickness h of the ingot;

[0023] C) adjusting the mechanical probe to the initial position through the traverse system, and using the distance meter to detect, so that the distance between the two paired mechanical probes is a preset value s;

[0024] D) adjusting the nozzle to the initial position through the horizontal telescopic system, and using the displacement detection device to detect, so that the distance between the two paired nozzles is s;

[0025] E) Control the left and right transverse movement systems to move toward the direction of the billet, record the change value b1 of the distance meter on the left side of the billet compared to before the movement and the real-time value p1 of the pressure sensor, and the change value b2 of the distance meter on the right side of the billet compared to before the movement and the real-time value p2 of the pressure sensor, when p1 ≥ e and p2 ≥ e, e is the pressure setting value, and b1 and b2 do not change within several seconds, control the transverse movement system to move away from the billet, so that the mechanical probe is adjusted to the initial position;

[0026] F) Control the left and right horizontal telescopic systems to move in the direction of the billet, and always record the change values ​​f1 and f2 of the left and right displacement detection devices compared with before the movement. When f1=b1-c, the left horizontal telescopic system stops moving, and when f2=b2-c, the right horizontal telescopic system stops moving;

[0027] G) Continuously spraying the narrow side of the ingot;

[0028] H) After casting is completed, the left and right horizontal telescopic systems are controlled to move away from the ingot and return to the initial position.

[0029] Preferably, the nozzle is connected to a pressure and flow detection and control system, and the pressure and flow detection and control system is connected to a medium pipe. In step G), the pressure and flow of each nozzle are adjusted to a preset pressure value P by the pressure and flow detection and control system. 设 and flow preset value V 设 After that, the narrow side of the ingot is continuously sprayed. If the pressure P of any nozzle is n and flow V n Greater or less than (0.9-1.1)P 设 or (0.9-1.1)V 设 When the pressure or flow of nozzle No. n is abnormal, please stop the machine and check and confirm.

[0030] Preferably, in the step E), if |b1-b2|≥k, where k is a system setting value, an alarm is given to remind that the center line of the ingot is not centered, and a check is performed after the casting is completed.

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] 1. Realize adaptive control of nozzle distance and angle under the condition of billet width change, ensure good cooling effect on narrow surface and reduce the occurrence of transverse and longitudinal cracks;

[0033] 2. Through the lifting system and displacement sensor, the nozzle can be accurately adjusted and controlled along the height direction of the casting billet;

[0034] 3. Through the traverse system, distance meter and mechanical probe, the distance between the mechanical probe and the narrow surface of the billet can be accurately measured, and the measured value of the distance between the mechanical probe and the billet on the left and right sides can be used to automatically determine whether the center line of the billet coincides with the center line of the continuous casting machine;

[0035] 4. The pressure and flow detection and control system can realize the accurate setting of the flow and pressure of each nozzle, and the change of the measured value can realize the self-determination of nozzle blockage or other abnormal working conditions;

[0036] 5. The integrated design of the movable block, connecting rod and sleeve realizes the simultaneous dynamic adjustment of multiple nozzles, and the design of the guide rod and sleeve greatly reduces the movement resistance;

[0037] 6. Through the design of different curvatures of the mounting block and the use of the mounting plate, the entire device can be quickly installed on the fan-shaped segments in different areas, meeting the needs of narrow surface spray cooling in different areas of the billet casting;

[0038] 7. The overall system has a simple structure, low price and strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of the adaptive control device for the secondary cooling nozzle at the edge of the continuous casting machine of the present invention;

[0040] Figure 2 for Figure 1 Sectional perspective view of the middle AA;

[0041] Figure 3 for Figure 1 A schematic diagram of the structure inside the middle spray device;

[0042] Figure 4 It is a schematic diagram of the self-adaptive control device for the secondary cooling nozzle at the edge of the continuous casting machine of the present invention installed on the continuous casting machine.

[0043] The components in the figure are numbered as follows:

[0044] Spraying device 1, ingot 2, continuous casting machine 3, guide column 4, sleeve 5, lifting system 6, mounting block 7, movable block 8, nozzle 9, connecting rod 10, sleeve 11, guide rod 12, horizontal telescopic system 13, displacement sensor 14, fixed frame 15, transverse movement system 16, mechanical probe 17, distance meter 18, pressure sensor 19, displacement detection device 20, pressure and flow detection and control system 21, medium pipe 22, mounting plate 23, continuous casting roller 24. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] like Figure 4 As shown, it is a schematic diagram of the structure of the continuous casting machine 3. The continuous casting machine 3 is mainly composed of a plurality of continuous casting rollers 24, wherein every 5 to 7 pairs of continuous casting rollers 24 form a fan-shaped segment, and the fan-shaped segment is divided into an arc segment, a straightening segment and a horizontal segment according to its installation position. Corresponding spraying devices 1, namely, an arc segment narrow surface spraying device, a straightening segment narrow surface spraying device and a horizontal segment narrow surface spraying device, can be installed on different fan-shaped segments.

[0047] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, an adaptive control device for secondary cooling nozzles at the edge of a continuous casting machine comprises two spray devices 1, which are symmetrically arranged on both sides of a continuous casting machine 3 with the width center line of the ingot 2 as the center, each spray device 1 comprises two vertical guide columns 4, each of which is sleeved with a sleeve 5, and the sleeve 5 is controlled to rise and fall by a lifting system 6, which can be an oil cylinder, an air cylinder or a stepping motor, etc. A mounting block 7 is connected between the two sleeves 5, and the mounting block 7 is hollow on the side facing the ingot 2, and a movable block 8 parallel to the mounting block 7 is arranged inside, and a plurality of nozzles 9 facing the ingot 2 are arranged on the movable block 8, and at least two vertical connecting rods 10 are arranged on the other side of the movable block 8, and both ends of the connecting rod 10 are sleeved on the guide rod 12 through a sleeve 11, one end of the guide rod 12 is fixed to the inner wall of the mounting block 7, and the other end faces the ingot 2, and the movable block 8 reciprocates through a horizontal telescopic system 13 arranged on the mounting block 7.

[0048] When this embodiment is used, the following steps are included:

[0049] A) After receiving the "start casting" instruction, the continuous casting roller 24 of the continuous casting machine 3 rotates and drives the billet 2 to move, and the optimal distance between the nozzle 9 and the end surface of the billet 2 is obtained in combination with the steel grade information;

[0050] B) obtaining the casting thickness of the ingot 2 and the height of the center line of the nozzle 9 from the lower roller surface, and adjusting the lifting system 6 so that the height of the center line of the nozzle 9 from the lower roller surface is half of the casting thickness of the ingot 2;

[0051] C) Control the left and right horizontal telescopic systems 13 to move toward the direction of the ingot 2, so that the distance between the nozzle 9 and the end surface of the ingot 2 is the optimal distance obtained in step A;

[0052] D) the nozzle 9 continuously sprays the narrow surface of the ingot 2;

[0053] E) After the casting is completed, the left and right horizontal telescopic systems 13 are controlled to move away from the ingot 2 and return to the initial position.

[0054] In another embodiment, an adaptive control device for secondary cooling nozzles at the edge of a continuous casting machine comprises two spray devices 1, which are symmetrically arranged on both sides of a continuous casting machine 3 with the width center line of the ingot 2 as the center. Each spray device 1 comprises two vertical guide columns 4, each of which is sleeved with a sleeve 5, and the sleeve 5 is controlled to rise and fall by a lifting system 6, which can be an oil cylinder, an air cylinder or a stepping motor, etc. A mounting block 7 is connected between the two sleeves 5, and the mounting block 7 is hollow on the side facing the ingot 2, and a movable block 8 parallel to the mounting block 7 is arranged inside, and a plurality of nozzles 9 facing the ingot 2 are arranged on the movable block 8, and at least two vertical connecting rods 10 are arranged on the other side of the movable block 8, and both ends of the connecting rod 10 are sleeved on the guide rod 12 through a sleeve 11, one end of the guide rod 12 is fixed to the inner wall of the mounting block 7, and the other end faces the ingot 2, and the movable block 8 reciprocates through a horizontal telescopic system 13 arranged on the mounting block 7.

[0055] Among them, the lifting system 6 is provided with a displacement sensor 14 for detecting the displacement of the sleeve 5, which can accurately control the lifting distance of the sleeve 5 and the mounting block 7 fixed on the sleeve 5. A fixing frame 15 is provided on the mounting block 7, and a transverse movement system 16 is provided on the fixing frame 15. The transverse movement system 16 can be an oil cylinder, an air cylinder or a stepping motor, etc. A mechanical probe 17 is installed on the movable side of the transverse movement system 16. The mechanical probe 17 moves toward the ingot 2 through the transverse movement system 16. The mechanical probe 17 is provided with a rangefinder 18 and a pressure sensor 19. The rangefinder 18 can accurately measure and control the moving distance of the mechanical probe 17. Through the change of the pressure value of the pressure sensor 19, it can be confirmed whether the mechanical probe 17 is in contact with the ingot 2 and the degree of contact tightness. The horizontal telescopic system 13 is provided with a displacement detection device 20 for detecting the displacement of the movable block 8.

[0056] When this embodiment is used, the following steps are included:

[0057] A) After receiving the "start casting" instruction, the continuous casting roller 24 of the continuous casting machine 3 rotates and drives the billet 2 to move, and the optimal distance c between the nozzle 9 and the end surface of the billet 2 is obtained in combination with the steel grade information;

[0058] B) obtaining the casting thickness h of the ingot 2, and obtaining the height a of the center line of the nozzle 9 from the lower roller surface by using the displacement sensor 14. When it is found that a≠h / 2, the lifting system 6 is adjusted so that the height a of the center line of the nozzle 9 from the lower roller surface is half of the casting thickness h of the ingot 2;

[0059] C) adjusting the mechanical probe 17 to the initial position by the traverse system 16, and using the distance meter 18 to detect, so that the distance between the two paired mechanical probes 17 is a preset value s;

[0060] D) adjusting the nozzle 9 to the initial position by the horizontal telescopic system 13, and using the displacement detection device 20 to detect, so that the distance between the two paired nozzles 9 is s;

[0061] E) Control the left and right transverse moving systems 16 to move toward the direction of the billet 2, record the change value b1 of the distance meter 18 on the left side of the billet 2 compared with the change value before the movement and the real-time value p1 of the pressure sensor 19, and the change value b2 of the distance meter 18 on the right side of the billet 2 compared with the change value before the movement and the real-time value p2 of the pressure sensor 19, when p1 ≥ e and p2 ≥ e, e is the pressure setting value, and b1 and b2 do not change within several seconds, control the transverse moving system 16 to move away from the billet 2, so that the mechanical probe 17 is adjusted to the initial position;

[0062] F) Control the left and right horizontal telescopic systems 13 to move toward the direction of the ingot 2, and constantly record the change values ​​f1 and f2 of the left and right displacement detection devices 20 compared with before the movement. When f1=b1-c, the left horizontal telescopic system 13 stops moving, and when f2=b2-c, the right horizontal telescopic system 13 stops moving;

[0063] G) continuously spraying the narrow side of the ingot 2;

[0064] H) After the casting is completed, the left and right horizontal telescopic systems 13 are controlled to move away from the ingot 2 and return to the initial position.

[0065] Wherein, in step E), if |b1-b2|≥k, where k is the system setting value, an alarm is issued to remind that the center line of the ingot 2 is not centered, and please check after the casting is completed.

[0066] In addition, in this embodiment, the nozzle 9 can also be connected to a pressure and flow detection and control system 21, and the pressure and flow detection and control system 21 is connected to a medium pipe 22. The flow and pressure of the nozzle 9 can be tracked and adjusted through the pressure and flow detection and control system 21, and the medium pipe 22 provides energy medium (water and gas, etc.) for the nozzle 9.

[0067] In step G), the pressure and flow rate of each nozzle 9 are adjusted to the preset pressure value P by the pressure and flow rate detection and control system 21. 设 and flow preset value V 设 After that, the narrow side of the ingot 2 is continuously sprayed. If the pressure P of any nozzle 9 is n and flow V n Greater or less than (0.9-1.1)P 设 or (0.9-1.1)V 设 When the pressure or flow of nozzle n is abnormal, please stop the machine and check.

[0068] In the above embodiment, the two ends of the guide column 4 are fixedly mounted by the mounting plate 23, the nozzle 9 is at the same height, and the shape of the mounting block 7 corresponds to the shape of the ingot 2, specifically, whether the mounting block 7 is curved, wherein, in combination Figure 4 As shown, the mounting block 7 of the narrow surface spraying device of the arc segment and the straightening segment has the same curvature as the casting machine, while the mounting block of the narrow surface spraying device of the horizontal segment is a rectangular block without curvature.

[0069] The present invention provides an adaptive control device and control method for the secondary cooling nozzle at the edge of a continuous casting machine, realizes adaptive control of the nozzle distance and angle under the condition of a change in the width of the billet 2, ensures a good cooling effect on the narrow surface, and reduces the occurrence of transverse and longitudinal cracks; through the lifting system 6 and the displacement sensor 14, the nozzle 9 is accurately adjusted and controlled along the height direction of the billet 2; through the transverse movement system 16, the rangefinder 18 and the mechanical probe 17, the distance between the mechanical probe 17 and the narrow surface of the billet 2 can be accurately measured, and the actual measured value of the distance between the mechanical probe 17 and the billet 2 on the left and right sides can be used to automatically determine whether the center line of the billet 2 coincides with the center line of the continuous casting machine 3; through the pressure and The flow detection and control system 21 can realize the precise setting of the flow and pressure of each nozzle 9, and can realize self-determination of nozzle 9 blockage or other abnormal working conditions through the change of the measured value; through the integrated design of the movable block 8, the connecting rod 10 and the sleeve 11, the simultaneous dynamic adjustment of multiple nozzles 9 is realized, and the movement resistance is greatly reduced through the design of the guide rod 12 and the sleeve 11; through the design of different curvatures of the mounting block 7 and the use of the mounting plate 23, the entire device can be quickly installed on the fan-shaped segments in different areas, meeting the needs of narrow surface spray cooling in different casting areas of the ingot 2; the overall system has a simple structure, low price and strong applicability.

[0070] Finally, it should be pointed out that the above content is a further detailed description of the invention in combination with specific implementation methods. It cannot be considered that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, simple replacements made without departing from the concept of the present invention should be regarded as belonging to the protection scope of the present invention. The above embodiments are only more representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there can be many variations. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope of the present invention.

[0071] At the same time, it should be noted that the description of the above technical solutions is exemplary, and this specification can be embodied in different forms and should not be construed as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solutions of the present invention are limited only by the scope of the claims. The features of the various embodiments of the present invention may be partially or completely combined or spliced ​​with each other, and may be performed in various different configurations as those skilled in the art may fully understand. The embodiments of the present invention may be performed independently of each other, or may be performed together in a mutually dependent relationship.

[0072] For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, and the above structures should be regarded as belonging to the protection scope of the present invention.

Claims

1. An adaptive control device for secondary cooling nozzles at the edge of a continuous casting machine, characterized in that: The invention comprises two spray devices (1), the spray devices (1) are symmetrically arranged on both sides of a continuous casting machine (3) with the width center line of a casting billet (2) as the center, each of the spray devices (1) comprises two vertical guide columns (4), each of the guide columns (4) is sleeved with a sleeve (5), the sleeve (5) is lifted and lowered by a lifting system (6), a mounting block (7) is connected between the two sleeves (5), the side of the mounting block (7) facing the casting billet (2) is hollow, and a parallel groove (6) is arranged inside the mounting block (7). A movable block (8) is provided with a plurality of nozzles (9) facing the ingot (2); at least two vertical connecting rods (10) are provided on the other side of the movable block (8); both ends of the connecting rod (10) are sleeved on a guide rod (12) through a sleeve (11); one end of the guide rod (12) is fixed on the inner wall of the mounting block (7), and the other end faces the ingot (2); the movable block (8) moves back and forth through a horizontal telescopic system (13) provided on the mounting block (7).

2. The self-adaptive control device for the secondary cooling nozzle at the edge of a continuous casting machine as claimed in claim 1, characterized in that: The lifting system (6) is provided with a displacement sensor (14) for detecting the displacement of the sleeve (5); the mounting block (7) is provided with a fixed frame (15); the fixed frame (15) is provided with a transverse movement system (16); a mechanical probe (17) is installed on the movable side of the transverse movement system (16); the mechanical probe (17) moves toward the ingot (2) through the transverse movement system (16); a distance meter (18) and a pressure sensor (19) are provided on the mechanical probe (17); and the horizontal telescopic system (13) is provided with a displacement detection device (20) for detecting the displacement of the movable block (8).

3. The self-adaptive control device for the secondary cooling nozzle at the edge of a continuous casting machine as claimed in claim 1, characterized in that: The nozzle (9) is connected to a pressure and flow detection and control system (21), and the pressure and flow detection and control system (21) is connected to a medium pipe (22).

4. The self-adaptive control device for the secondary cooling nozzle at the edge of a continuous casting machine as claimed in claim 1, characterized in that: Both ends of the guide column (4) are fixedly mounted via mounting plates (23).

5. The self-adaptive control device for the secondary cooling nozzle at the edge of a continuous casting machine as claimed in claim 1, characterized in that: The outer shape of the mounting block (7) corresponds to the shape of the casting billet (2).

6. The self-adaptive control device for the secondary cooling nozzle at the edge of a continuous casting machine as claimed in claim 1, characterized in that: The nozzles (9) are of equal height.

7. A control method for the adaptive control device for the secondary cooling nozzle at the edge of a continuous casting machine as claimed in claim 1, characterized in that: The steps include: A) upon receiving the "start casting" instruction, the continuous casting roller (24) of the continuous casting machine (3) rotates and drives the cast billet (2) to move, and the optimal distance between the nozzle (9) and the end face of the cast billet (2) is obtained in combination with the steel grade information; B) obtaining the casting thickness of the ingot (2) and the height of the center line of the nozzle (9) from the lower roller surface, and adjusting the lifting system (6) so that the height of the center line of the nozzle (9) from the lower roller surface is half of the casting thickness of the ingot (2); C) controlling the left and right horizontal telescopic systems (13) to move toward the direction of the ingot (2) so that the distance between the nozzle (9) and the end surface of the ingot (2) is the optimal distance obtained in step A); D) the nozzle (9) continuously sprays the narrow surface of the ingot (2); E) After the casting is completed, the left and right horizontal telescopic systems (13) are controlled to move away from the ingot (2) and return to the initial position.

8. The control method of the continuous casting machine side secondary cooling nozzle adaptive control device according to claim 7, characterized in that: The lifting system (6) is provided with a displacement sensor (14) for detecting the displacement of the sleeve (5); the mounting block (7) is provided with a fixed frame (15); the fixed frame (15) is provided with a transverse movement system (16); a mechanical probe (17) is installed on the movable side of the transverse movement system (16); the mechanical probe (17) moves toward the ingot (2) through the transverse movement system (16); the mechanical probe (17) is provided with a distance meter (18) and a pressure sensor (19); the horizontal telescopic system (13) is provided with a displacement detection device (20) for detecting the displacement of the movable block (8); and the control comprises the following steps: A) upon receiving the "start casting" instruction, the continuous casting roller (24) of the continuous casting machine (3) rotates and drives the cast billet (2) to move, and the optimal distance c between the nozzle (9) and the end face of the cast billet (2) is obtained in combination with the steel grade information; B) obtaining the casting thickness h of the ingot (2), using a displacement sensor (14) to obtain the height a of the center line of the nozzle (9) from the lower roller surface, and when it is checked that a≠h / 2, adjusting the height a of the center line of the nozzle (9) from the lower roller surface through the lifting system (6) so that the height a of the center line of the nozzle (9) from the lower roller surface is half of the casting thickness h of the ingot (2); C) adjusting the mechanical probe (17) to an initial position by means of a traverse system (16), and using a distance meter (18) to detect so that the distance between the two paired mechanical probes (17) is a preset value s; D) adjusting the nozzle (9) to an initial position by means of a horizontal telescopic system (13), and using a displacement detection device (20) to detect that the distance between the two paired nozzles (9) is s; E) controlling the left and right transverse moving systems (16) to move toward the direction of the ingot (2), recording the change value b1 of the distance meter (18) on the left side of the ingot (2) compared with the change value before the movement and the real-time value p1 of the pressure sensor (19), and the change value b2 of the distance meter (18) on the right side of the ingot (2) compared with the change value before the movement and the real-time value p2 of the pressure sensor (19), when p1≥e and p2≥e, e is the pressure setting value, and b1 and b2 do not change within a few seconds, controlling the transverse moving system (16) to move away from the ingot (2), so that the mechanical probe (17) is adjusted to the initial position; F) controlling the left and right horizontal telescopic systems (13) to move in the direction of the ingot (2), and constantly recording the change values ​​f1 and f2 of the left and right displacement detection devices (20) compared to before the movement, when f1=b1-c, the left horizontal telescopic system (13) stops moving, and when f2=b2-c, the right horizontal telescopic system (13) stops moving; G) continuously spraying the narrow side of the ingot (2); H) After the casting is completed, the left and right horizontal telescopic systems (13) are controlled to move away from the ingot (2) and return to the initial position.

9. The control method of the continuous casting machine side secondary cooling nozzle adaptive control device according to claim 8, characterized in that: The nozzle (9) is connected to a pressure and flow detection and control system (21), and the pressure and flow detection and control system (21) is connected to a medium pipe (22). In step G), the pressure and flow of each nozzle (9) are adjusted to a preset pressure value P by the pressure and flow detection and control system (21). 设 and flow preset value V 设 After that, the narrow side of the ingot (2) is continuously sprayed. If the pressure P of any nozzle (9) is n and flow V n Greater or less than (0.9-1.1)P 设 or (0.9-1.1)V 设 When the pressure or flow of nozzle n (9) is abnormal, please stop the machine and check.

10. The control method of the continuous casting machine side secondary cooling nozzle adaptive control device according to claim 8, characterized in that: In the step E), if |b1-b2|≥k, where k is a system setting value, an alarm is triggered to remind that the center line of the ingot (2) is not centered, and a check is performed after the casting is completed.

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