CN115488300A - Thin steel strip continuous casting multiple-roll-diameter casting roll interchange casting machine equipment - Google Patents

Abstract

The invention discloses a thin steel strip continuous casting multiple-roll-diameter casting roll interchanging casting machine device, which comprises two crystallization rolls and a crystallization roll car which rotate oppositely, and the casting machine device also comprises: the roll gap adjusting mechanism comprises: the roll gap adjusting mechanism is arranged on the crystallization roll trolley, the pair of crystallization rolls are arranged on the roll gap adjusting mechanism, and the roll gap adjusting mechanism can realize the adjustment of the gap between the pair of crystallization rolls; crystallization roller roll changing assembly: the crystallization roller vehicle moves along with the crystallization roller changing assembly; when the invention is used for overhauling a unit or achieves a continuous production roll changing period, the time for changing the crystallization rolls can be quickly shortened as much as possible, and the distance between a pair of crystallization rolls can be adjusted by arranging the roll gap adjusting mechanism, so that the crystallization rolls with various sizes can be installed, thereby having more choices and being capable of producing products with better varieties and performances.

Description

Thin steel strip continuous casting multiple-roll-diameter casting roll interchange casting machine equipment

Technical Field

The invention relates to the technical field of metallurgical continuous casting metal strips, in particular to a device for continuously casting a thin steel strip by exchanging casting rolls with various roll diameters.

Background

The thin strip steel continuous casting technology is a leading-edge technology with short flow, low cost, low energy consumption and environmental protection in the field of metallurgy. The method integrates the traditional technological processes of continuous casting, rolling, heat treatment and the like, completes the short-flow thin strip steel continuous casting production line, and greatly shortens the flow of the whole production line. The whole process saves a large amount of labor cost and energy cost, and improves the yield; the occupied area is small, the equipment is simple and centralized, and the early investment is small; the material has unique sub-rapid solidification characteristics, special microstructure and excellent performance; the resulting cast strip thickness is close to the final product thickness. Therefore, the process has the advantages of less equipment investment, low energy consumption and the like, and realizes green manufacturing in the steel industry.

In a thin steel strip continuous casting unit, core equipment is a double-roller crystallization roller, and when the crystallization rollers with different roller diameters produce steel grades with different materials and brands, the performance of products is slightly different. Compared with the prior thin steel strip continuous casting unit which uses different roll diameters and roll surface widths, the invention has more choices and can produce products with better varieties and performances. In addition, when the unit is overhauled or the continuous production roll changing period is achieved, the time for changing the crystallization roll can be shortened as far as possible; compared with the prior art, the roller diameter changing device can not realize the changing of various roller diameters, and the main difficulties in the changing process comprise the following four points:

1. the installation position of the prior crystallization roller is fixed, so the size of the applicable crystallization roller and the gap between the crystallization rollers are fixed, and the crystallization rollers with different roller diameters cannot be replaced;

2. the existing crystallization roller is internally communicated with cold fluid, and the design of the connecting device of the existing crystallization roller and the cold fluid is originally applied to the disposable installation of the crystallization roller, so the sealing technical requirement and the connecting mode are both designed under the requirement of the disposable installation of the crystallization roller, and the operation is inconvenient when the crystallization roller is replaced;

3. the connection mode of the existing crystallization roller and the crystallization roller rotation driving device is not suitable for quickly replacing the crystallization roller.

The above three factors all limit the replacement and use of various roll diameter crystallization rolls in thin strip caster equipment. Therefore, there is a need for improvement of the existing equipment to solve the above technical problems.

Disclosure of Invention

The invention aims to provide casting equipment for continuously casting various roll diameter casting rolls by using thin steel strips, which is used for solving the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: a thin steel strip continuous casting multiple roll diameter casting roll interchanging casting machine equipment, which comprises two crystallization rolls and a crystallization roll car which rotate oppositely, and the casting machine equipment also comprises:

the roll gap adjusting mechanism comprises: the roll gap adjusting mechanism is arranged on the crystallizing roller vehicle, the pair of crystallizing rollers are arranged on the roll gap adjusting mechanism, and the roll gap adjusting mechanism can realize the adjustment of the gap between the pair of crystallizing rollers; the crystallization roller is locked on the crystallization roller vehicle through four crystallization roller locking mechanisms; the crystallization roller locking mechanism arranged on the periphery of the crystallization roller trolley fixes the crystallization roller on the crystallization roller trolley through a spring mechanism and a crystallization roller bearing seat bottom plate fixing hook; wherein, 2 locking mechanisms fixed on the inlet side of the frame fixedly lock the crystallization roller car and the frame through one of an oil cylinder, an air cylinder or an electric cylinder;

the locking mechanism at the operation side end part of the crystallization roller trolley axially fixes the crystallization roller trolley through one of an oil cylinder, an air cylinder or an electric cylinder; under the action of the crystallization roller car movement auxiliary pushing mechanism and the axial traction mechanism, the crystallization roller car moves back and forth between an off-line roller changing position and an on-line working position;

crystallization roller drive device: the crystallization roller driving device comprises a motor, a motor brake, a speed reducer, transmission shafts, a transmission shaft bracket mechanism, a fluid quick connecting device assembled on equipment of a crystallization roller vehicle and a crystallization roller vehicle movement auxiliary pushing mechanism, wherein the two transmission shafts are connected in a cross universal transmission shaft mode;

the crystallization roller is connected with a cooling water circulation system through a quick connecting device; the crystallization roller trolley is locked on the frame through a crystallization roller locking mechanism;

a water gap plate: the water gap plate is fixed on the crystallization roller vehicle through a supporting structure, each side of the water gap plate is formed by supporting 2 supporting structures, cooling liquid is introduced into the water gap plate for circulation control, the water gap plate and the side sealing baffle plate form a sealed space above the crystallization roller, and protective gas is introduced through the periphery of the water gap plate to reduce the oxidation of liquid molten steel of a molten pool between the crystallization roller and the side sealing baffle plate.

As a preferable technical solution of the present invention, the roll gap adjusting mechanism includes a pair of linear guides, and the pair of linear guides are symmetrically and fixedly installed at both ends of the crystallization roll; each linear guide rail is provided with a pair of crystallization roller bearing seat bottom plates in a sliding manner, and the crystallization roller bearing seat bottom plates are driven by the secondary oil cylinder mechanism to reciprocate along the linear guide rails; the crystallizing roller bearing seat bottom plate is fixedly connected with a bearing seat, and the roller necks at two ends of the crystallizing roller are respectively and fixedly connected in the bearing seats at the same side of the crystallizing roller.

As a preferable technical solution of the present invention, the above casting machine apparatus further comprises a pair of brush rolls installed on the nip adjusting mechanism in a position-adjustable manner; the pair of crystallization rollers and the pair of brush rollers correspond to each other one by one, and the brush rollers and the crystallization rollers realize the removal of iron oxide scales on the surfaces of the crystallization rollers in a mutual friction mode.

As a preferable technical scheme of the invention, a pressure adjusting mechanism for adjusting the pressure between the brush roll and the crystallization roll is also fixedly connected to the base plate of the bearing seat of the crystallization roll, the pressure adjusting mechanism comprises one of an oil cylinder or an air cylinder, and the pressure adjusting mechanism further comprises a pressure sensor for measuring the pressure between the brush roll and the crystallization roll.

As a preferred technical scheme of the invention, the crystallization roller changing assembly comprises a transverse moving vehicle, a tractor, a roller changing track and a transverse moving track, wherein the roller changing track and the transverse moving track are arranged at different heights of casting machine equipment and are crossed; the transverse moving vehicle is driven by the transverse moving vehicle driving mechanism to slide back and forth along the transverse moving track; the tractor is driven by the tractor driving mechanism to slide back and forth along the roller changing track; the crystallization roller trolley is hung below the cross-sliding trolley, and when the cross-sliding trolley moves to the middle position, the crystallization roller trolley moves along the roller changing track under the traction action of the tractor.

As a preferred technical scheme of the invention, the casting machine equipment further comprises a crystallization roller driving device, wherein the crystallization roller driving device comprises a motor, a motor brake, a speed reducer, a transmission shaft bracket mechanism and a crystallization roller-changing vehicle movement auxiliary pushing mechanism; the crystallization device comprises a motor, a speed reducer, a motor brake, a crystallization roller, a flat head shaft, a shaft sleeve and a motor brake, wherein the motor is provided with the motor brake, an output shaft of the motor is in transmission connection with the speed reducer, an output shaft of the speed reducer is in transmission connection with the transmission shaft, and the transmission shaft is in transmission connection with the crystallization roller through the flat head shaft and the shaft sleeve; the two transmission shafts are connected in a cross universal transmission shaft mode.

In a preferred embodiment of the present invention, the casting machine facility further comprises a cooling stave and a sealing means on the cooling stave, the cooling stave and the sealing means on the cooling stave are disposed below the crystallization rolls, the sealing means on the cooling stave is disposed in a gap between the cooling stave and the crystallization rolls, and the sealing means on the cooling stave is installed between the cooling stave and the crystallization rolls in such a manner that the position thereof can be adjusted.

As a preferred technical scheme of the invention, the casting machine equipment is also provided with a dust hood, and the dust hood is arranged at a position capable of collecting iron scale dust removed from the crystallization roller by the brush roller; the dust hood is connected with a dust removal system ventilation pipeline through a quick connecting device.

As a preferable technical scheme of the invention, a transmission shaft bracket mechanism is arranged below the two transmission shafts, the transmission shaft bracket mechanism is lifted through an oil cylinder, and the transmission shaft bracket mechanism can manually adjust the transverse position to meet the roller changing positions with different roller diameters.

In a preferred embodiment of the present invention, the casting machine further comprises a side-sealing baffle mechanism, wherein the side-sealing baffle mechanism controls the pressure between the side-sealing baffle mechanism and the contact surface of the end of the crystallization roller through a first hydraulic cylinder and a pressure sensor.

Compared with the prior art, the invention has the beneficial effects that:

the invention can realize the gap adjustment between the rollers of the pair of crystallization rollers by arranging the roller gap adjusting mechanism and arranging the crystallization rollers on the roller gap adjusting mechanism; the crystallization roller is connected with the cooling water circulation system through the quick connection device, so that the cooling liquid supply requirement when the roller diameters of different sizes are installed can be met; through setting up crystallization roller drive arrangement and including motor, motor band-type brake, reduction gear, transmission shaft bracket mechanism, the fluid quick connecting device of assembly equipment on the crystallization roller car, supplementary pushing mechanism is removed to the crystallization roller car, and two transmission shafts adopt cross universal drive shaft form to connect, can realize that crystallization roller drive arrangement and not unidimensional crystallization roller install fast. Through the improvement of the four points, the whole casting machine equipment can be matched with the crystallizing rollers with different roller diameter sizes so as to install the crystallizing rollers with different roller diameter sizes.

In conclusion, when the machine set is overhauled or a continuous production roll changing period is achieved, the time for changing the crystallization rolls can be shortened as far as possible, the distance between a pair of crystallization rolls can be adjusted by arranging the roll gap adjusting mechanism, and then the crystallization rolls with various sizes can be installed, so that more choices are provided, and products with better varieties and performances can be produced.

Drawings

FIG. 1 is a schematic view of a thin strip continuous casting plant with interchangeable rolls of various diameters;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 1;

FIG. 4 is a schematic structural view of a main perspective view of an apparatus for continuously casting a thin steel strip with multiple casting rolls of different roll diameters in a casting machine with interchangeable rolls;

FIG. 5 is a schematic structural view of a thin steel strip continuous casting machine with interchangeable casting rolls of various roll diameters;

FIG. 6 is a schematic front view of the crystallizer roll drive in a thin steel strip continuous casting multiple roll diameter casting roll exchange caster apparatus;

FIG. 7 is a schematic view of a portion of the structure of FIG. 6;

FIG. 8 is a schematic view of a portion of the structure of FIG. 6;

FIG. 9 is a schematic view of a portion of the structure of FIG. 6;

FIG. 10 is a schematic structural view of a side seal baffle mechanism according to the present invention;

FIG. 11 is a front view of the brush roll mechanism of the present invention;

FIG. 12 is a top view of a roll changing device of a crystallization roll cart according to the present invention;

FIG. 13 is a schematic cross-sectional view of the male and female portions of the fluid quick connector of the present invention;

FIG. 14 is a schematic view of the female portion of the fluid quick connect apparatus of the present invention;

FIG. 15 is a schematic view showing a structure of a crystallization roller locking device in the present invention;

FIG. 16 is a perspective view of the spring mechanism of the present invention;

FIG. 17 is a schematic cross-sectional view of the spring mechanism of the present invention;

FIG. 18 is a schematic view showing a structure of a crystallization roller locking device and a spring mechanism used in cooperation in the present invention;

FIG. 19 is a schematic view showing the structure of a crystallization roller locking device and a spring mechanism according to the present invention when they are used in combination;

FIG. 20 is a schematic view showing a structure of a crystallization roller lock device and a spring mechanism used in combination in the present invention.

In the figure: 1. a crystallization roller; 2. a side seal baffle mechanism; 3. a brush roll; 4. a water feeding port plate; 5. a stave; 6. an adjustment device; 7. a motor; 8. a motor brake; 9. a speed reducer; 10. a drive shaft; 11. a drive shaft bracket mechanism; 12. a fluid quick connect device; 1201. a male part; 1202. a female part; 1203. positioning pins; 1204. a positioning pin hole; 1205. a locking device; 1206. a water passage hole; 13. the crystallization roller car moves the auxiliary pushing mechanism; 14. a crystallization roller car traction mechanism; 15. a second section of track; 16. a first section of track; 17. carrying out crystallization roller turning; 18. a frame; 19. traversing the track; 20. a first hydraulic cylinder; 21. a pressure sensor; 22. a locking mechanism at the operation side end part of the crystallization roller vehicle; 23. a locking mechanism; 24. a half-moon molten pool; 25. the crystallization roller car moves the auxiliary pushing mechanism; 26. a sealing device on the cooling wall; 27. heating the box; 28. a secondary oil cylinder mechanism; 29. a crystallization roller locking device; 30. a bearing seat; 31. a crystallization roller transmission shaft; 32. a hydraulic motor; 33. a second hydraulic cylinder; 34. a linear guide rail; 35. a third hydraulic cylinder; 36. a linear guide rail; 37. a crystallization roller bearing seat bottom plate; 38. a spring mechanism; 3801. a spring; 39. the crystallizing roller bearing block base plate is fixed with a hook.

Detailed Description

In order to make those skilled in the art better understand the technical solutions of the embodiments of the present application, the following description will be made clearly and completely in conjunction with the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict, and the present application will be described in detail with reference to fig. 1 to 20 in conjunction with the embodiments.

The embodiment provides a thin steel strip continuous casting multiple-roll-diameter casting roll interchanging casting machine device, which comprises two crystallization rolls 1 and a crystallization roll car 17 which rotate oppositely, and the casting machine device further comprises:

the roll gap adjusting mechanism comprises: the roll gap adjusting mechanism is arranged on the crystallization roller trolley 17, the pair of crystallization rollers 1 are both arranged on the roll gap adjusting mechanism, and the roll gap adjusting mechanism can realize the adjustment of the gap between the pair of crystallization rollers 1; crystallization roller changing assembly: the crystallization roller car 17 moves following the crystallization roller changing assembly. The roll gap adjusting mechanism comprises a pair of linear guide rails 36, and the linear guide rails 36 are symmetrically and fixedly arranged at two ends of the crystallization roller 1;

a pair of crystallization roller bearing seat bottom plates 37 are slidably mounted on each linear guide rail 36, and the crystallization roller bearing seat bottom plates 37 reciprocate along the linear guide rails 36 under the driving of the secondary oil cylinder mechanism 28; the bearing seats 30 are fixedly connected to the bearing seat bottom plate 37 of the crystallization roller, and the roller necks at the two ends of the crystallization roller 1 are respectively and fixedly connected to the bearing seats 30 at the same side.

The crystallization roller changing assembly comprises a transverse moving vehicle, a tractor, a roller changing track and a transverse moving track 19, wherein the roller changing track and the transverse moving track 19 are arranged at different heights of the casting machine equipment, and the roller changing track and the transverse moving track 19 are crossed; the cross sliding vehicle is driven by the cross sliding vehicle driving mechanism to slide back and forth along the cross sliding track 19; the tractor is driven by the tractor driving mechanism to slide back and forth along the roller changing track; the crystallization roller trolley 17 is hung below the cross-sliding trolley, and when the cross-sliding trolley moves to the middle position, the crystallization roller trolley 17 moves along the roller changing track under the traction action of the tractor. The casting machine equipment also comprises a pair of brush rolls 3, and the pair of brush rolls 3 are arranged on the roll gap adjusting mechanism in a position-adjustable mode; the pair of crystallization rollers 1 correspond to the pair of brush rollers 3 one by one, and the brush rollers 3 and the crystallization rollers 1 remove iron oxide scales on the surfaces of the crystallization rollers 1 in a mutual friction mode. The crystallizing roller bearing seat bottom plate 37 is also fixedly connected with a pressure adjusting mechanism used for adjusting the pressure between the brush roller 3 and the crystallizing roller 1, the pressure adjusting mechanism comprises one of an oil cylinder or an air cylinder, and the pressure adjusting mechanism further comprises a pressure sensor used for measuring the pressure between the brush roller 3 and the crystallizing roller 1.

The casting machine equipment also comprises a crystallization roller driving device, wherein the crystallization roller driving device comprises a motor 7, a motor contracting brake 8, a speed reducer 9, a transmission shaft 10, a transmission shaft bracket mechanism 11 and a crystallization roller vehicle movement auxiliary pushing mechanism 13; wherein, a motor band-type brake 8 is arranged on the motor 7, an output shaft of the motor 7 is in transmission connection with a speed reducer 9, an output shaft of the speed reducer 9 is in transmission connection with a transmission shaft 10, and the transmission shaft 10 is in transmission connection with the crystallization roller 1 through a flat shaft and a shaft sleeve. The casting machine equipment further comprises a stave 5 and an on-stave sealing device 26, both the stave 5 and the on-stave sealing device 26 being disposed below the crystallization roll 1, the on-stave sealing device 26 being disposed at a gap between the stave 5 and the crystallization roll 1 and the on-stave sealing device 26 being installed between the stave 5 and the crystallization roll 1 in such a manner that its position can be adjusted. The casting machine equipment is also provided with a dust hood, and the dust hood is arranged at a position capable of collecting iron scale dust removed from the crystallization roller 1 by the brush roller 3; the dust hood is connected with a ventilating duct of a dust removing system through a quick connecting device 12.

A transmission shaft bracket mechanism 11 is arranged below the two transmission shafts 10, the transmission shaft bracket mechanism 11 is lifted through an oil cylinder, and the transmission shaft bracket mechanism 11 can manually adjust the transverse position to meet the roll changing positions with different roll diameters. The casting machine equipment also comprises a side sealing baffle mechanism, and the side sealing baffle mechanism 2 controls the pressure between the end contact surfaces of the crystallizing rollers 1 through a first hydraulic cylinder 20 and a pressure sensor 21.

The method comprises the following specific steps:

as shown in fig. 12, a crystallization roller carriage 17 can be rapidly moved as an integral unit from the roll changing station to the on-line casting station to rapidly remove the crystallization roll 1 when the crystallization roll needs to be changed.

The molten metal molten steel is poured into a tundish (not shown) through a ladle (not shown), flows into a flow distribution distributor (not shown) after being controlled by the tundish and a tundish sliding nozzle plate (not shown), and finally flows into a meniscus molten pool 24 formed by a roll gap at the upper part of two crystallizing rollers 1 and an edge side sealing baffle mechanism 2;

as shown in FIG. 10, the side seal damper mechanism 2 controls the pressure between the contact surfaces of the first hydraulic cylinder 20 and the end of the crystallization roller 1 by means of the pressure sensor 21 to control the service life of the side seal damper 2.

The inside of the crystallization roller 1 is solidified into a shell block along with the rotating roller surface of the crystallization roller 1 and the casting surface of a semilunar molten pool 24 through circulating cooling water, the shell block is converged at a roller gap, a solidified thin strip product 25 is formed through extrusion of the crystallization roller 1, and then the solidified thin strip product enters a closed hot box 27 filled with protective gas, and 2 semiarc-shaped guide plates (not shown) are arranged in the hot box to assist in threading.

As shown in fig. 1, 4 two-stage cylinder mechanisms 28 mounted on the frame 18 are used to fix or adjust the gap between two crystallization rollers 1, a magnetostrictive displacement sensor is arranged in the cylinder, 2 linear guide rails 36 are arranged below each bearing seat 30, when the crystallization rollers 1 return to the roller-changing locking device position through the two-stage cylinder mechanisms 28, the four crystallization roller locking devices 29 lock and fix the crystallization rollers 1 on the crystallization roller carriage 17 by means of spring mechanisms 33 and crystallization roller bearing seat bottom plate fixing hooks 32;

when the crystallization roller 1 returns to the roller-changing locking device position through the two-stage oil cylinder mechanism 28, the four crystallization roller locking devices 29 lock and fix the crystallization roller 1 on the crystallization roller carriage 17 by means of the spring mechanism 38 and the crystallization roller bearing seat bottom plate fixing hook 39, the spring mechanism 38 is internally provided with a spring 3801 which can lift under the action of the crystallization roller locking device 29, when the crystallization roller bearing seat bottom plate fixing hook 39 is lifted, and when the crystallization roller bearing seat bottom plate fixing hook 39 is lifted, the spring mechanism 38 is hooked by the crystallization roller bearing seat bottom plate fixing hook 39; the crystallization roller bearing seat bottom plate fixing hook 39 is fixedly arranged on the crystallization roller bearing seat bottom plate 37;

the structure of the spring mechanism 33 is shown in FIG. 15, and the structure of the crystallization roller lock device 29 is shown in FIGS. 16 and 17; fig. 18 shows a schematic view of the structure of the crystallization roller lock device 29 and the spring mechanism 33 when locked.

The two-stage oil cylinder mechanism 28 is connected with a bearing seat 30 of the crystallization roller 1 to drive the crystallization roller 1 to move, and the gap between the two crystallization rollers 1 is controlled by a closed loop of a displacement sensor and an oil cylinder hydraulic valve to obtain the preset thickness of the cast strip steel.

As shown in fig. 6, the crystallization roller driving device comprises a motor 7, a motor brake 8, a speed reducer 9, transmission shafts 10, a transmission shaft bracket mechanism 11, a fluid quick connecting device 12 assembled on a crystallization roller vehicle 17, and a crystallization roller vehicle movement auxiliary pushing mechanism 13, wherein the two transmission shafts 10 are in the form of cross universal transmission shafts 9 and have multi-roller diameter adjusting capability. The transmission shaft 10 and the crystallization roller 1 are quickly connected or disconnected at the crystallization roller transmission shaft 31 in a flat shaft and shaft sleeve mode, and the flat positioning function is realized through a PLC program and field detection elements, so that the crystallization roller 1 is conveniently and quickly replaced. The bracket mechanisms 11 are arranged below the two transmission shafts 10, and the transverse positions of the bracket mechanisms 11 can be manually adjusted by adopting an oil cylinder lifting mode, so that the roller changing position requirements of different roller diameters are met. The crystallization roller 1 retreats to the roller changing locking device position for adjusting and installing the crystallization rollers 1 with different roller diameters within the range of phi 560-800 mm.

When the crystallization roller 1 needs to be replaced, the crystallization roller 1 retracts to a roller replacement locking device position through a secondary oil cylinder mechanism 28 arranged on the frame 18, and the secondary oil cylinder mechanism 28 can be an oil cylinder, an air cylinder or an electric cylinder;

as shown in fig. 3 and fig. 15-20, the four crystallization roller locking devices 29 are retracted by one of the driving oil cylinder, the air cylinder or the electric cylinder, the spring mechanism 33 is lifted by means of the built-in spring thereof, and the crystallization rollers are locked and fixed on the crystallization roller carriage 17 by the crystallization roller bearing block bottom plate fixing hook 32.

The crystallization roller car traction mechanism 14 moves to an on-line position and is fixed with the crystallization roller car 17 in a buckling mode, 2 locking mechanisms 23 on the inlet side of the rack 18 and a locking mechanism 22 at the operation side end part of the crystallization roller car are opened, the crystallization roller car 17 is rapidly moved out to a roll changing position along a first section of track 16 by taking the position of a crystallization roller transmission shaft 31 as a separation point under the combined action of the crystallization roller car movement auxiliary pushing mechanism 13 and the crystallization roller car traction mechanism 14, the crystallization roller car is pushed to move to one side by a transverse moving car driving mechanism (not shown), meanwhile, another set of crystallization roller car 17 assembled in advance is transversely moved to the roll changing position along a transverse moving track 19, and the crystallization roller car 1 is moved to the on-line working position along the first section of track 16 through a tractor 14 to complete the process of changing the crystallization roller 1.

As shown in fig. 10 and 11, the brush roller 3 is driven to rotate by a motor or a hydraulic motor 32; the brush roller 3 can move back and forth along the axial direction of the linear guide rail 36 under the pushing of the second hydraulic cylinder 33; meanwhile, the device is pushed by a third hydraulic cylinder 35 to move in the range of a linear guide rail 36, and the pressure between the brush roller 3 and the crystallizing roller 1 is adjusted through pressure sensors at the two sides of the brush roller 3 and the crystallizing roller 1 and a valve for controlling the third hydraulic cylinder 35; the brush roller 3 can be put into operation according to actual needs; a dust hood (not shown) is arranged around the brush roller 3 to collect the iron oxide scale dust removed from the crystallization roller 1 by the brush roller 3, and the dust hood is connected with a ventilation pipeline of a dust removal system through a quick connection device 12.

As shown in FIGS. 6, 7 and 10, the upper nozzle plate 4 and the side seal baffle plate 2 form a sealed space above the crystallization roller 1, and protective gas (nitrogen and argon) is introduced around the nozzle plate to prevent the liquid molten steel 24 in the molten bath between the crystallization roller 1 and the side seal baffle plate 2 from being oxidized.

As shown in FIG. 5, a stave 5 and a stave upper sealing device 26 are provided below the crystallization roll 1; the cooling wall upper sealing device 26 is assembled on the crystallization roller carriage 17; the cooling wall upper sealing device 26 is a sealing plate in the present embodiment; the sealing plate is in contact with the cooling wall 5 and the outer wall of the crystallization roll 1, and the width of the cooling wall 5 is different according to the diameter of the crystallization roll, and the micro-positive pressure protective atmosphere in the hot box 27 must be maintained,

the sealing plate is fixedly connected with an adjusting device 6, and the adjusting device 6 can adopt an oil cylinder or an air cylinder; the adjusting device 6 adjusts the position of the sealing plate to ensure the gap between the sealing plate and the crystallization roll 1 to form a relatively closed local space. The cooling wall is internally provided with a fin cooling structure, and a circulating cooling medium is introduced.

As shown in fig. 12, the crystallization roller-changing assembly includes a tractor, a roller-changing rail, and a traverse rail 19; wherein the roller changing track consists of 2 sections, and the first section of track 16 is flush with the on-line track; the second section of track 15 is arranged on the cross sliding vehicle and consists of 2 groups of 4 same tracks; the transverse moving track 19 and the roller changing track 15 are not at the same height position, and the roller changing track and the transverse moving track 19 are crossed; the brush roll 3 and the crystallization roll 1 which are assembled on the crystallization roller car 17 can move back and forth on the first section of track 16, the second section of track 15 and the transverse moving track 19, the crystallization roller car 17 is hoisted below the transverse moving car and moves back and forth on the transverse moving track 19 along with the transverse moving car, and when the transverse moving car moves to the middle position of the transverse moving track 19, the crystallization roller car 17 moves along the roll changing track through a tractor;

in the embodiment, the traverse vehicle moves under the driving of a traverse vehicle driving mechanism, wherein the traverse vehicle driving mechanism is an oil cylinder, an electric cylinder or a motor matched with a gear;

the driving of the tractor driving mechanism slides along the roller changing track in a reciprocating manner, the tractor driving mechanism comprises a motor, a reduction gearbox, a gear and a chain, the motor drives the reduction gearbox to rotate, the gear is fixedly sleeved on an output shaft of the reduction gearbox, and the gear is meshed with the chain.

The crystallization roller vehicle 17 moves on the track 19 under the drive of a transmission mechanism such as an oil cylinder/electric cylinder/gear motor.

A closed hot box 27, 2 semi-arc guide plates in the hot box and a waste collecting device are arranged below the cooling wall of the crystallization roller; the waste collecting device can move on the track through the transmission mechanism, the transmission mechanism has a hydraulic lifting function, and a sealing mechanism is arranged between the waste collecting device and the hot box.

The crystallization roller 1 is connected with a cooling liquid system through a quick connection device 12, as shown in fig. 13 and 14, the quick connection device 12 for fluid comprises a male part 1201 and a female part 1202, the male part 1201 is fixedly arranged on a crystallization roller carriage 17, and the male part 1201 moves along with the crystallization roller carriage 17; the female part 1202 is fixedly mounted on the frame 18; the male part 1201 is provided with positioning pins 1203, and the female part 1202 is provided with positioning pin holes 1204 corresponding to the positioning pins 1203 one to one; meanwhile, the female part 1202 further comprises a locking device 1205, and the locking device 1205 is opened under hydraulic or pneumatic driving to pull and lock the male part 1201, so that the male part 1201 and the female part 1202 are prevented from being released in working; the water channel hole 1206 of the male part 1201 is communicated with the water channel hole 1206 of the female part 1202;

the male part 1201 and the female part 1202 have a plurality of water passage holes 1206 therein, and the water passage holes 1206 of the male part 1201 and the female part 1202 are in one-to-one correspondence. The male part 1201 is connected to the crystallization roller 1 and the cooling wall 5 through piping. When the crystallization roller carriage 17 is moved to the working position, the male portion is inserted into the female portion, and the fluid passage is closed, and the cold fluid flowing through the crystallization roller 1 and the cooling wall 5 is supplied by the quick-connecting device 12, and the heat-absorbed fluid is discharged by the quick-connecting device.

The dust hood is also connected with a dust removal system ventilation pipeline through a water passage hole 1206 of the quick connecting device 12;

the transmission of the crystallization rollers 1 is transmitted by an alternating current variable frequency motor and is output to the two crystallization rollers 1 through a speed reducer and a transmission shaft.

The above embodiments are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equally replaced or changed within the scope of the present invention.

Claims (10)

1. A thin steel strip continuous casting multiple roll diameter casting roll interchanging casting machine equipment, which comprises two crystallization rolls and a crystallization roll car which rotate oppositely, and is characterized by further comprising:

a roll gap adjusting mechanism: the roll gap adjusting mechanism is arranged on the crystallization roller vehicle, the pair of crystallization rollers are arranged on the roll gap adjusting mechanism, and the roll gap adjusting mechanism can realize the adjustment of the gap between the pair of crystallization rollers; the crystallization roller is locked on the crystallization roller vehicle through four crystallization roller locking mechanisms; the crystallization roller locking mechanism arranged on the periphery of the crystallization roller trolley fixes the crystallization roller on the crystallization roller trolley through a spring mechanism and a crystallization roller bearing seat bottom plate fixing hook; wherein, 2 locking mechanisms fixed on the inlet side of the frame fixedly lock the crystallization roller car and the frame through one of an oil cylinder, an air cylinder or an electric cylinder;

the locking mechanism at the operating side end part of the crystallization roller trolley axially fixes the crystallization roller trolley through one of an oil cylinder, an air cylinder or an electric cylinder; under the action of the crystallization roller car movement auxiliary pushing mechanism and the axial traction mechanism, the crystallization roller car moves back and forth between an off-line roller changing position and an on-line working position;

crystallization roller drive device: the crystallization roller driving device comprises a motor, a motor brake, a speed reducer, transmission shafts, a transmission shaft bracket mechanism, a fluid quick connecting device assembled on equipment of a crystallization roller vehicle and a crystallization roller vehicle movement auxiliary pushing mechanism, wherein the two transmission shafts are connected in a cross universal transmission shaft mode;

the crystallization roller is connected with a cooling water circulation system through a quick connection device; the crystallization roller trolley is locked on the frame through a crystallization roller locking mechanism;

a water gap plate: the water gap plate is fixed on the crystallization roller vehicle through a supporting structure, each side of the water gap plate is formed by supporting 2 supporting structures, cooling liquid is introduced into the water gap plate for circulation control, the water gap plate and the side sealing baffle plate form a sealed space above the crystallization roller, and protective gas is introduced through the periphery of the water gap plate to reduce the oxidation of liquid molten steel of a molten pool between the crystallization roller and the side sealing baffle plate.

2. The interchangeable casting apparatus for thin steel strip continuous casting rolls of multiple roll diameters as claimed in claim 1, wherein said roll gap adjustment mechanism comprises a pair of linear guides symmetrically and fixedly mounted at opposite ends of the crystallization rolls; each linear guide rail is provided with a pair of crystallization roller bearing seat bottom plates in a sliding manner, and the crystallization roller bearing seat bottom plates are driven by the secondary oil cylinder mechanism to reciprocate along the linear guide rails; the crystallizing roller is characterized in that a bearing seat is fixedly connected to a bearing seat bottom plate of the crystallizing roller, and roller necks at two ends of the crystallizing roller are respectively and fixedly connected to the bearing seats at the same side of the crystallizing roller.

3. The apparatus of claim 1 further comprising a pair of brushrolls positioned and adjustably mounted on the roll gap adjustment mechanism; the pair of crystallization rollers and the pair of brush rollers correspond to each other one by one, and the brush rollers and the crystallization rollers realize the removal of iron oxide scales on the surfaces of the crystallization rollers in a mutual friction mode.

4. The apparatus of claim 1 further comprising a pressure adjusting mechanism for adjusting the pressure between the brush roll and the crystallizer roll, wherein the pressure adjusting mechanism comprises one of a cylinder or an air cylinder and the pressure adjusting mechanism further comprises a pressure sensor for measuring the pressure between the brush roll and the crystallizer roll.

5. The apparatus of claim 1 wherein said crystallizing roll changing assembly comprises a traverse car, a tractor, a roll changing track and a traverse track, said roll changing track and traverse track being mounted at different heights of the casting apparatus and said roll changing track and traverse track being criss-crossed; the transverse moving vehicle is driven by the transverse moving vehicle driving mechanism to slide back and forth along the transverse moving track; the tractor is driven by the tractor driving mechanism to slide back and forth along the roller changing track; the crystallization roller trolley is hung below the cross-sliding trolley, and when the cross-sliding trolley moves to the middle position, the crystallization roller trolley moves along the roller changing track under the traction action of the tractor.

6. The apparatus of claim 1 further comprising a crystallizer drive unit, said crystallizer drive unit comprising a motor, a motor brake, a speed reducer, a drive shaft bracket mechanism, and a crystallization roll changer movement assist drive mechanism; the crystallization device comprises a motor, a speed reducer, a motor brake, a crystallization roller, a flat head shaft, a shaft sleeve and a motor brake, wherein the motor is provided with the motor brake, an output shaft of the motor is in transmission connection with the speed reducer, an output shaft of the speed reducer is in transmission connection with the transmission shaft, and the transmission shaft is in transmission connection with the crystallization roller through the flat head shaft and the shaft sleeve; the two transmission shafts are connected in a cross universal transmission shaft mode.

7. The interchangeable caster apparatus for thin steel strip continuous casting of rolls having a plurality of diameters as claimed in claim 1 further comprising a stave and sealing means on the stave, the stave and sealing means on the stave being positioned below the crystallization rolls, the sealing means on the stave being positioned in a gap between the stave and the crystallization rolls and the sealing means on the stave being adjustably positioned between the stave and the crystallization rolls.

8. The interchangeable casting machine equipment for the multiple-roll-diameter casting rolls for the continuous casting of thin steel strips according to claim 1, wherein the casting machine equipment is further provided with a dust hood, and the dust hood is arranged at a position capable of collecting iron oxide scale dust removed from the crystallization rolls by the brush rolls; the dust hood is connected with a dust removal system ventilation pipeline through a quick connecting device.

9. The apparatus for continuously casting multiple interchangeable crystallizing rolls for crystallizing rolls from thin steel strip as claimed in claim 1, wherein a transmission shaft bracket mechanism is arranged below the two transmission shafts, the transmission shaft bracket mechanism is lifted by an oil cylinder and the transmission shaft bracket mechanism can be adjusted manually in the transverse position to meet the requirements of roll changing positions of different roll diameters.

10. The apparatus of claim 1 further comprising a side dam mechanism for controlling pressure between the contact surfaces of the side dam mechanism and the ends of the chill rolls by means of a first hydraulic cylinder and a pressure sensor 21.

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