Automatic switching of molten iron transfer system for nodular iron ladle and gray iron ladle

Abstract

The application relates to a molten iron transfer system capable of automatically switching between a nodular iron ladle and a gray iron ladle, wherein a ladle cover lifting device is arranged near a pouring track and comprises a ladle cover lifting claw; a front-of-furnace liftable transfer trolley comprises walking wheels for walking and further comprises a lifting mechanism for realizing longitudinal height displacement of a molten iron ladle; a transfer trolley can walk and is used for moving and transferring the molten iron ladle; a double-station pouring machine ladle changing trolley comprises two stations for containing the molten iron ladle and is configured to walk on the pouring track; in a region defined between the front-of-furnace track and the pouring track, a fixed roller station and a nodular iron ladle tilting device are sequentially arranged and are configured as a transfer route from the front-of-furnace track to the pouring track; a gray iron ladle tilting device and a fixed roller station with a cover opening device are sequentially arranged and are configured as a transfer route from the pouring track to the front-of-furnace track. The molten iron transfer system can be applicable to different melting furnaces and different grades of molten iron and is used for simultaneously producing different parts in the same molding line.

Description

Technical Field

[0001] This application relates to the field of casting equipment, and in particular to a molten iron transfer system that automatically switches between ductile iron ladles and gray iron ladles. Background Technology

[0002] Hot iron transfer is an essential step in steelmaking or iron product manufacturing. The current hot iron transfer process is as follows: For ductile iron or gray iron molten iron, a spheroidizing agent or inoculant is placed in an empty ladle. The molten iron is obtained from the melting furnace, and after slag removal, a transfer car transports the ladle to the pouring area. After pouring, the ladle is returned to its original position, placed back in the transfer car, and the slag is dumped. Then, the empty ladle is refilled with spheroidizing and inoculant agents. The ladle is then transferred to the electric furnace for the next ladle of molten iron.

[0003] Existing molten iron transfer systems are relatively limited, allowing only one type of molten iron to be used on a single production line at a time, and preventing the simultaneous use of two types. Changing the type of molten iron requires shutdown and adjustments, which is time-consuming and labor-intensive. Furthermore, there are difficulties in coordinating workstations at different heights or on different horizontal planes during the transfer process. Therefore, there is an urgent need in this field for a molten iron transfer system that can include multi-station, height-adjustable transfer vehicles, making molten iron transfer more efficient. Summary of the Invention

[0004] The purpose of this application is to provide an automatic switching system for molten iron transfer between ductile iron ladles and gray iron ladles, so that ladles of different grades of molten iron can be transferred alternately for casting, thereby improving the efficiency of workshop transfer.

[0005] This application discloses an automatic switching system for molten iron transfer between ductile iron ladles and gray iron ladles, comprising: a melting furnace, a furnace front rail, a casting rail, a furnace front liftable transfer car, a transfer car, a double-station casting machine ladle changing car, a gray iron ladle tilting device, a fixed roller conveyor station with a lid opening device, a ductile iron ladle tilting device, a fixed roller conveyor station, a molten iron ladle lid opening device, a slag removal station, and a ladle pressing station, wherein... The melting furnace is configured to produce molten iron; The furnace front track is close to the melting furnace and extends along the arrangement direction of the melting furnace, for the transfer vehicle to reach or move away from the melting furnace; The pouring track extends close to the pouring machine for the transfer vehicle to or away from the pouring machine; the ladle opening device is located near the pouring track and includes ladle cover lifting claws; The furnace-front liftable transfer vehicle includes wheels for movement and a lifting mechanism for vertically displacing the molten iron ladle. The transfer car is mobile and can be used for the transfer of molten iron ladles. The double-station casting machine ladle changer includes two stations for accommodating molten iron ladles and is configured to travel on the casting track; In the area defined between the furnace front track and the casting track, the fixed roller conveyor station and the ductile iron ladle tilting device are arranged in sequence, forming a transfer route from the furnace front track to the casting track; the gray iron ladle tilting device and the fixed roller conveyor station with opening device are arranged in sequence, forming a transfer route from the casting track to the furnace front track.

[0006] In a preferred embodiment, the furnace-front liftable transfer vehicle further includes: a weighing mechanism, a roller mechanism, and a baffle mechanism; The roller drive mechanism includes a roller driven by a roller drive motor, the roller being configured to provide one-dimensional displacement to the molten iron ladle located on the transfer car; The lifting mechanism includes a frame, a lifting servo motor, and a ball screw. On both sides of the frame, the lifting servo motor is configured to drive the ball screw. At least two pairs of guide wheels are provided on each side of the lifting mechanism. The guide wheels are embedded in the guide rails of the furnace front liftable transfer cart and slide up and down on the guide rails, so that the lifting mechanism can achieve longitudinal height displacement relative to the traveling wheels. The baffle mechanism is configured to limit or allow the passage of the molten iron ladle by changing the physical position of the baffle. The weighing mechanism is mounted on the lifting mechanism and configured to detect the weight of the molten iron ladle.

[0007] In a preferred embodiment, the gray iron ladle tilting device includes a bottom frame, a tilting cylinder, a horizontal fixing cylinder, a horizontal fixing claw, a vertical fixing cylinder, a vertical fixing claw, and a tilting frame; wherein The tilting frame includes rollers for carrying the molten iron ladle; the tilting cylinder is located below the bottom frame and is configured to provide lift to the bottom frame so that the bottom frame drives the molten iron ladle to tilt around the pivot. The horizontal fixed cylinder is connected to the lower part of the tilting frame and distributed along the axial direction of the roller. The horizontal fixed claw is connected to the horizontal fixed cylinder and is configured to receive the driving force output by it. When tilting is performed, the molten iron ladle is clamped in the axial direction of the roller. The vertical fixing cylinder is connected to the lower part of the tilting frame and distributed along the direction of the roller arrangement. The vertical fixing claw is connected to the vertical fixing cylinder and is configured to receive the driving force output by it. When tilting is performed, it clamps the molten iron ladle in the direction of the roller arrangement.

[0008] In a preferred embodiment, the fixed roller conveyor station with opening device includes a roller conveyor and a baffle mechanism that restricts or allows the passage of molten iron ladles in the direction along the roller conveyor. The roller conveyor also includes guide wheels for limiting the molten iron ladle on both sides; and a liftable ladle cover lifting claw is provided on one side of the roller conveyor.

[0009] In a preferred embodiment, the bottom of the fixed roller conveyor station with the cover opening device includes a lifting frame for mounting a lifting mechanism that controls the lifting of the cover lifting claw.

[0010] In a preferred embodiment, the ductile iron ladle tilting device includes a tilting frame, a roller conveyor on the tilting frame, and a baffle mechanism in the direction of travel along the roller conveyor to restrict or allow the passage of the molten iron ladle. The ductile iron ladle tilting device also includes a tilting cylinder, a tilting frame, and a rotating shaft. The tilting cylinder is configured to tilt the tilting frame that carries the molten iron ladle.

[0011] In a preferred embodiment, the ladle opening device includes a lifting frame for mounting a lifting mechanism for the ladle cover lifting claw.

[0012] In a preferred embodiment, the lifting mechanism is limited by guide wheels and moves in the vertical direction.

[0013] In a preferred embodiment, the slag removal station is located on one side of the extension direction of the furnace front track and is configured to remove slag from the molten iron ladle transported by the furnace front liftable transfer car.

[0014] In a preferred embodiment, the ladle pressing station is located on one side of the furnace front track extension direction and is configured to provide ladle pressing spheroidizing agent and / or fill inoculant for molten iron.

[0015] This application has at least the following technical effects: 1. This invention is a molten iron transfer system that can be applied to different melting furnaces and different grades of molten iron, and can be used to produce different parts simultaneously on the same molding line.

[0016] 2. The furnace-front liftable transfer car of this system can support the transfer of molten iron ladles of different specifications. And according to the different heights of different molten iron ladles, even if the furnace-front melting furnace specifications and the tapping iron level are different, the molten iron ladle can be raised and lowered to the optimal tapping iron level.

[0017] 3. This system includes two fixed roller conveyors that transport molten iron ladles to the casting machine to accommodate different ladles, and is equipped with tilting and ladle cover opening and closing mechanisms, making the whole system more widely applicable.

[0018] The specification of this application contains numerous technical features distributed across various technical solutions. Listing all possible combinations of these technical features (i.e., technical solutions) would make the specification excessively lengthy. To avoid this problem, the various technical features disclosed in the above-described invention, the various technical features disclosed in the following embodiments and examples, and the various technical features disclosed in the accompanying drawings can be freely combined to form various new technical solutions (all of which should be considered as described in this specification), unless such a combination of technical features is technically infeasible. For example, one example discloses feature A+B+C, and another example discloses feature A+B+D+E. Features C and D are equivalent technical means that serve the same function, and technically only one needs to be used; they cannot be used simultaneously. Feature E can technically be combined with feature C. Therefore, the solution A+B+C+D should not be considered as described because it is technically infeasible, while the solution A+B+C+E should be considered as described. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the molten iron transfer system according to this application; Figure 2 This is a schematic diagram of the melting furnace in the molten iron transfer system according to this application; Figure 3 It is based on Figure 1 AA view; Figure 4 It is based on Figure 1 The BB-direction view shows the steps of the gray iron bag tipping device 7 dumping waste residue; Figures 5A-5C yes Figure 1 The CC view shows the operation steps of the ladle opening device 11; Figure 6A This is a front view of the furnace-front liftable transfer car of the molten iron transfer system of this application; Figures 6B-6C They are Figure 6A The top view of the AA-direction view and the furnace front liftable transfer car (excluding the molten iron ladle); Figures 7A-7C These are, respectively, the front view, left view, and top view of the transfer car 5 of the molten iron transfer system of this application; Figures 8A-8C These are, respectively, the front view, left view, and top view of the double-station casting machine changing car 6 of the molten iron transfer system of this application; Figures 9A-9C These are, respectively, the front view, left view, and top view of the gray ladle tipping device 7 of the molten iron transfer system of this application; Figure 9DIt is the AA view of 9A; Figures 10A-10C These are, respectively, the front view, left view, and top view of the fixed roller conveyor station with opening device 8 of the molten iron transfer system of this application; Figure 11A-11C These are, respectively, the front view, the right view, and the top view of the ductile iron ladle tipping device 9 of the molten iron transfer system of this application; Figure 12A-12B These are, respectively, a front view and a top view of the fixed roller conveyor station 10 of the molten iron transfer system of this application; Figures 13A-13C These are, respectively, the front view, left view, and top view of the molten iron ladle opening device 11 of the molten iron transfer system of this application; Figures 14A-14C These are, respectively, the front view, top view, and right view of the slag removal station 12 of the molten iron transfer system of this application.

[0020] Explanation of reference numerals in the attached figures: 1- Melting furnace; 2-Furnace front track; 3-Pouring track; 4- Furnace-front liftable transfer trolley; 41- Traveling wheel; 42- Travel drive motor; 43- Coupling; 44- Drive shaft; 45- Ball screw; 46- Lifting servo motor; 47- Steering gear; 48- Guide wheel; 49- Guide rail; 410- Roller; 411- Sprocket; 412- Chain; 413- Roller drive motor; 414- Baffle; 415- Baffle shaft; 416- Baffle drive motor; 417- Weighing; 5-Transfer vehicle; 51-Walking wheel; 52-Walking drive motor; 53-Coupling; 54-Drive shaft; 55-Roller; 56-Sprocket; 57-Chain; 58-Roller drive motor; 59-Baffle; 510-Baffle shaft; 511-Baffle drive motor; 512-Steering gear; 6-Dual-station casting machine changing cart; 61-Walking wheel; 62-Walking drive motor; 63-Coupling; 64-Drive shaft; 65-Roller; 66-Sprocket; 67-Chain; 68-Roller drive motor; 69-Baffle; 610-Baffle shaft; 611-Baffle drive motor; 612-Steering device; 7-Tilting device for gray iron ladles; 71-Bottom frame; 72-Tilting cylinder; 73-Horizontal fixing cylinder; 74-Vertical fixing cylinder; 75-Tilting frame; 76-Horizontal connecting shaft; 77-Horizontal fixing claw; 78-Vertical fixing claw; 79-Roller; 710-Sprocket; 711-Chain; 712-Roller drive motor; 713-Baffle; 714-Baffle shaft; 715-Baffle drive motor; 716-Steering mechanism; 717-Rotating shaft; 8-Fixed roller conveyor station with cover opening device; 81-Roller; 82-Sprocket; 83-Chain; 84-Roller drive motor; 85-Baffle; 86-Baffle shaft; 87-Baffle drive motor; 88-Steering device; 89-Iron ladle guide wheel; 810-Lifting frame; 811-Lifting guide wheel; 812-Lifting cylinder; 813-Laptop lifting claw; 9- Tilting device for ball ladle; 91- Roller; 92- Sprocket; 93- Chain; 94- Roller drive motor; 95- Tilting cylinder; 96- Tilting support; 97- Shaft; 10-Fixed roller conveyor station; 101-Roller; 102-Sprocket; 103-Chain; 104-Roller drive motor; 105-Baffle; 106-Baffle shaft; 107-Baffle drive motor; 108-Steering device; 11-Ladle opening device; 111-Lifting frame; 112-Lifting guide wheel; 113-Lifting cylinder; 114-Ladle cover lifting claw; 12-Slag removal station; 121-Roller; 122-Sprocket; 123-Chain; 124-Roller drive motor; 13-Packing station; 131-Roller; 132-Sprocket; 133-Chain; 134-Roller drive motor; 14-ball iron bag; 15-Gray iron liner; 151-Gray iron liner cover; 152-Positioning guide post; 16-Pouring machine; 17-Control System. Detailed Implementation

[0021] In the following description, many technical details are presented to help the reader better understand this application. However, those skilled in the art will understand that the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0022] the term As used herein, “furnace front liftable transfer vehicle” and “liftable transfer vehicle” are interchangeable and both refer to the furnace front liftable transfer vehicle 4 of this application. "Dual-station casting machine changing car" and "changing car" can be used interchangeably and both refer to the dual-station casting machine changing car 6 in this application; "Gray iron bag tipping device" and "tilting device" are used interchangeably and both refer to the tipping device 7 of this application; "Fixed roller conveyor station with cover opening device" and "cover opening device" are interchangeable and both refer to the fixed roller conveyor station with cover opening device 8 of this application.

[0023] The following is a brief summary of some of the innovative aspects of the embodiments of this application: This application provides a system for transferring molten iron using different track layouts and transfer car types. The transfer cars mainly include a furnace-front liftable transfer car, a transfer car, a double-station casting machine ladle-changing car, and their corresponding tracks. This system achieves higher adaptability and efficiency in transferring molten iron between the ladle pressing station, the melting furnace, and the casting machine. The main workstations of the system are as follows: Melting furnace 1, such as Figure 2 As shown, it is used for metal melting and heat preservation. The melting furnace may optionally be a medium-frequency electric furnace.

[0024] Furnace front track 2, such as Figure 2 As shown, the track laid in front of the melting furnace is used for the movement of the furnace-mounted transfer car 4 and the transfer car 5. Multiple melting furnaces 1 are arranged along the extension direction of the furnace-front track 2.

[0025] Pouring track 3, such as Figure 1 As shown, the track is laid in front of the casting machine. It is used for the movement of the ladle-changing car 6 of the double-station casting machine. When the ladle-changing car 6 of the double-station casting machine stops in front of the casting machine, the casting machine can pick up the molten iron ladle for casting.

[0026] Four liftable transfer carts in front of the furnace, such as Figures 6A-6C As shown, this is a furnace-front lifting transfer car 4 used for receiving and transferring molten iron. The furnace-front lifting transfer car 4 includes traveling wheels 41 for the car's movement; a traveling drive motor 42 for outputting traveling torque; a coupling 43 for connecting the drive shaft and the transmission shaft; and a transmission shaft 44 for connecting the driven wheel set. The lifting transfer car 4 is equipped with a frame for carrying the molten iron ladle and acting as a chassis. Pairs of guide wheels 48 are provided on the left and right sides of the frame. The guide wheels 48 can cooperate with the guide rails 49 on the transfer car 4, allowing the frame to carry the molten iron ladle and move longitudinally on the transfer car. The transfer car 4 is equipped with a ball screw 45 for lifting and lowering the frame carrying the molten iron ladle, and a lifting servo motor 46 drives the ball screw. A steering mechanism 47 is used to change the direction of force transmission. The guide wheels 48 are located on both sides of the frame, and the guide rails 49 are located on the transfer car 4 and extend vertically. The guide wheels 48 and the guide rails 49 cooperate to achieve sliding displacement, thereby realizing the lifting and lowering of the frame carrying the molten iron ladle. Roller 410, located on the frame, is used to transfer molten iron in a one-dimensional plane, facilitating its forward and backward movement. Sprocket 411 and chain 412 serve as the transmission mechanism for roller 410, transmitting mechanical energy from the motor to the roller and driving all rollers to rotate. Roller drive motor 413 provides the rolling torque. Baffles 414 are located at both ends of the roller to prevent the molten iron from slipping off the transfer car. Baffles 414 also have independent power sources; baffle drive motor 416 outputs the driving force for opening or closing the baffle, transmitting the motor's kinetic energy to the baffle via baffle shaft 415. Weighing sensors 417 are located on both sides of the frame, one on each side, to measure the weight of the remaining molten iron after it has been received or poured out.

[0027] Transfer car 5 is used to transfer molten iron ladles, such as Figures 7A-7C As shown, the molten iron ladle is received from the slag removal station and transported to the fixed roller conveyor. The transfer car 5 includes traveling wheels 51 for trolley movement; a traveling drive motor 52 for outputting traveling torque; a coupling 53 for connecting the drive shaft and the transmission shaft; and a transmission shaft 54 ​​for connecting the driven wheel set. The transfer car 5 also includes rollers 55 for transmitting the molten iron ladle in a one-dimensional plane; sprockets 56 and chains 57 serve as the transmission mechanism for the rollers 55, transmitting mechanical energy from the motor to the rollers and driving all rollers to roll; and a roller drive motor 58 serves as the power source, outputting the rolling torque of the rollers. A baffle 59 prevents the molten iron ladle from slipping. The baffle 59 also has an independent power source; a baffle drive motor 511 outputs the driving force for opening or closing the baffle, transmitting the power to the baffle shaft 510. In an optional embodiment, the baffle shaft includes a horizontal drive shaft and a vertical drive shaft, which are connected by a steering mechanism 512. The steering mechanism 512 is used to change the direction of force transmission, so that the driving force from the motor 511 can be transmitted from the horizontal shaft to the vertical shaft, thereby controlling the opening or closing of the baffle. In an optional embodiment, the transfer car 5 includes one baffle on each side of the roller conveyor, that is, a total of two baffles, to bidirectionally control the passage / stopping of the molten iron ladle on the transfer car 5.

[0028] The double-station casting machine ladle changing car 6 is used to receive molten iron ladles in turn and transfer them to the casting machine as needed. For example... Figures 8A-8C As shown, the ladle changing car 6 has two parallel workstations, which can accommodate two ladles of molten iron simultaneously. The ladle changing car 6 includes traveling wheels 61 for the car's movement; a traveling drive motor 62 for outputting traveling torque; a coupling 63 for connecting the drive shaft and the transmission shaft; and a transmission shaft 64 for connecting the driven wheel set. The ladle changing car 6 includes rollers 65 for transferring the molten iron ladle in a one-dimensional plane; sprockets 66 and chains 67 serve as the transmission mechanism for rollers 65, transmitting mechanical energy from the motor to the rollers and driving all rollers to roll; and a roller drive motor 68 serves as the power source, outputting the rolling torque of the rollers. A baffle 69 prevents the molten iron ladle from slipping. The baffle 69 also has an independent power source; a baffle drive motor 611 outputs the driving force for opening or closing the baffle, transmitting the power to the baffle shaft 610. In an optional embodiment, the baffle shaft includes a horizontal drive shaft and a vertical drive shaft, which are connected by a steering mechanism 612. The steering mechanism 612 is used to change the direction of force transmission, so that the driving force from the motor 611 can be transmitted from the horizontal shaft to the vertical shaft, thereby controlling the opening or closing of the baffle. In an optional embodiment, the ladle changing car 6 includes one baffle on each side of the roller conveyor, that is, a total of two baffles, to bidirectionally control the passage / stopping of molten iron ladles on the ladle changing car 6.

[0029] The gray ladle tipping device 7 is a machine used to tip over the gray ladle and empty the residual molten iron from it, such as... Figures 9A-9D As shown, it is located between the fixed roller conveyor station and the casting track 3. The ladle tilting device 7 includes a bottom frame 71 for supporting the upper structure; a tilting cylinder 72 for tilting the upper structure; a horizontal fixing cylinder 73 for outputting force in the horizontal direction to prevent the ladle from slipping on the roller conveyor; a vertical fixing cylinder 74 for outputting force to the vertical fixing claw to fix the ladle when tilting; a tilting frame 75 for installing the fixing claw and hydraulic rod; a horizontal connecting shaft 76 for the two horizontal fixing claws; a horizontal fixing claw 77 for receiving the output force of the horizontal fixing cylinder 73 and for clamping and fixing the bottom of the ladle in the horizontal direction (i.e., the axial direction of the roller conveyor); and a vertical fixing claw 78 for receiving the output force of the vertical fixing cylinder 74 and for locking the ladle when tilting. The ladle tilting device 7 includes rollers 79 for transferring molten iron in a one-dimensional plane; sprockets 710 and chains 711 serve as the transmission mechanism for rollers 79, transmitting mechanical energy from the motor to the rollers and driving all rollers to roll; roller drive motor 712 acts as a power source, outputting the rolling torque of the rollers. A baffle 713 prevents the ladle from slipping. The baffle 713 also has an independent power source; a baffle drive motor 715 outputs the driving force for opening or closing the baffle, transmitting the power to the baffle shaft 714. In an optional embodiment, the baffle shaft includes a horizontal drive shaft and a vertical drive shaft, connected by a steering gear 716. The steering gear 716 changes the direction of force transmission, allowing the driving force from the motor 715 to be transmitted from the horizontal shaft to the vertical shaft, thereby controlling the opening or closing of the baffle. In an optional embodiment, the tilting device 7 includes one baffle on each side of the roller conveyor, i.e., a total of two baffles, to bidirectionally control the passage / stopping of the molten iron ladle on the tilting device 7. When tilting is performed, the bottom frame of the tilting device, carrying the molten iron ladle, rotates around the rotating shaft 717 at a fixed point.

[0030] The fixed roller conveyor station with a cover opening device 8 is used for opening and closing the cover of the molten iron ladle and for transferring the molten iron ladle. For example... Figures 10A-10CAs shown, the opening device 8 includes a roller 81 for conveying the molten iron ladle in a one-dimensional plane; a sprocket 82 and a chain 83 serve as the transmission mechanism for the roller 81, transmitting mechanical energy from the motor to the roller and driving all rollers to roll; a roller drive motor 84 serves as the power source, outputting the rolling torque of the roller. A baffle 85 is used to prevent the molten iron ladle from slipping. The baffle 85 also has an independent power source, with a baffle drive motor 87 outputting the driving force for opening or closing the baffle, transmitting the power to the baffle shaft 86. In an optional embodiment, the baffle shaft includes a horizontal drive shaft and a vertical drive shaft, connected by a steering gear 88. The steering gear 88 changes the direction of force transmission, so the driving force from the motor 87 can be transmitted from the horizontal shaft to the vertical shaft, thereby controlling the opening or closing of the baffle. In an optional embodiment, the fixed roller conveyor station opening device 8 includes one baffle on each side of the roller conveyor, i.e., a total of two baffles, to bidirectionally control the passage / stopping of the molten iron ladle on the tilting device 7. On both sides of the roller conveyor, there are also ladle guide wheels 89, which are used to limit the position of the ladle on the roller conveyor so as not to deviate to the left or right. The bottom of the lid opening device 8 includes a lifting frame 810, which is used to install the lifting mechanism for lifting the lid lifting claw; the lifting guide wheel 811 is used to guide the lifting mechanism; the lifting cylinder 812 provides lifting force as a drive mechanism; and the lid lifting claw 813 is used to grab the ladle lid.

[0031] The ductile iron ladle tilting device 9 is a machine used to tilt the ductile iron ladle and pour the molten iron into a gray iron ladle, such as... Figure 11A-11C As shown, it is located between the fixed roller conveyor station and the pouring track 3. The ductile iron ladle tilting device 9 includes a roller 91 for transferring molten iron in one dimension in a plane; a sprocket 92 and a chain 93 serve as the transmission mechanism for the roller 91, transmitting mechanical energy from the motor to the roller and driving all rollers to roll; a roller drive motor 94 serves as the power source, outputting the rolling torque of the roller. The tilting cylinder 95 serves as the power source providing lift for tilting the ductile iron ladle. When the ductile iron ladle is tilted by the ductile iron ladle tilting device 9, the tilting frame is supported on the tilting support 96 and rotates at a fixed point around the rotating shaft 97.

[0032] Fixed roller conveyor station 10 is used to transfer molten iron ladles between transfer car 5 and ductile iron ladle tilting device 9, such as Figure 12A-12BAs shown, it is therefore positioned between the ladle tilting device 9 and the transfer car 5. The fixed roller conveyor station 10 includes rollers 101 for transferring molten iron ladles in a one-dimensional plane; sprockets 102 and chains 103 serve as the transmission mechanism for rollers 101, transmitting mechanical energy from the motor to the rollers and driving all rollers to roll; roller drive motor 104 serves as the power source, outputting the rolling torque of the rollers. Baffles 105 are used to prevent the molten iron ladle from slipping. Baffles 105 also have an independent power source, with a baffle drive motor 107 outputting the driving force for opening or closing the baffle, transmitting the power to the baffle shaft 106. In an optional embodiment, the baffle shaft includes a horizontal drive shaft and a vertical drive shaft, connected by a steering gear 108. The steering gear 108 changes the direction of force transmission, so the driving force from the motor 107 can be transmitted from the horizontal shaft to the vertical shaft, thereby controlling the opening or closing of the baffle. In an optional embodiment, the fixed roller conveyor station 10 includes one baffle on each side of the roller conveyor, that is, a total of two baffles, to bidirectionally control the passage / stopping of molten iron ladles on the fixed roller conveyor station 10.

[0033] The ladle opening device 11 is located near the pouring track, such as... Figures 13A-13C As shown, the ladle opening device 11 is used to open and close the lid of the gray ladle on the ladle changing car 6. The ladle opening device 11 includes a lifting frame 111 for mounting the lifting mechanism; lifting guide wheels 112 are set on the frame 111 for limiting and guiding the lifting mechanism in the vertical direction; and lifting oil 113 is used as a driving source to lift and lower the ladle lid lifting claw 114 that grabs the ladle lid.

[0034] The slag removal workstation 12 is distributed along the track of the transfer car 5, as follows: Figures 14A-14B As shown, it is used for transferring molten iron ladles and removing slag from inside the ladles. The slag removal station 12 includes a roller 121 for transferring molten iron ladles in a one-dimensional plane; a sprocket 122 and a chain 123 serve as the transmission mechanism for the roller 121, for transmitting mechanical energy from the motor to the roller and driving all the rollers to roll; the roller drive motor 124 serves as the power source to output the rolling torque of the rollers.

[0035] The ladle pressing station 13 is distributed along the path of the transfer car 5 and is used to add spheroidizing agent or inoculant to the molten iron ladle. After the transfer car 5 transports the spheroidized molten iron ladle to the ladle pressing station, the spheroidizing agent is manually pressed into the ladle; after the empty molten iron ladle is transported to the ladle pressing station, the inoculant is manually filled in. The ladle is transported to the furnace front by a roller conveyor to collect molten iron from the furnace. After the ladle is full of molten iron, it is transported to the slag removal station by the roller conveyor. The slag is manually removed. The ladle pressing station 13 includes a roller 131 for transporting the molten iron ladle in one dimension in a plane; a sprocket 132 and a chain 133 serve as the transmission mechanism of the roller 131, which transmits the mechanical energy from the motor to the roller and drives all the rollers to rotate; the roller drive motor 134 serves as the power source to output the rolling torque of the roller.

[0036] Ductile iron ladle 14 is used to hold molten iron that needs to be spheroidized.

[0037] The gray ladle 15 is used to hold molten iron. The gray ladle 15 includes a ladle cover 151 for heat insulation. After being filled with molten iron, the ladle cover 151 is typically placed on the gray ladle 15. A positioning guide post 152 guides the ladle cover 151 to ensure precise placement on the gray ladle.

[0038] The casting machine 16 is used to finally receive molten iron and perform casting. The casting machine can be a bottom-pouring casting machine, in which molten iron flows out from the pouring gate and flows into the mold cavity through the sand mold to realize product production.

[0039] Control system 17 controls the operation of the entire system. Control system 17 is communicatively and operably connected to the various mechanisms described above; communication between the system and the various mechanisms can be via any number of wired or wireless connections. Any number of wired and wireless Controller Area Network (CAN) buses provide the exchange of signals, information, and / or data. Because the system is communicatively connected to the various mechanisms of the transport vehicle, the control cabinet is configured to receive data from one or more components.

[0040] Transshipment system workflow An empty ductile iron ladle 14 or an empty gray iron ladle 15 is placed in the ladle pressing station 13. For the empty ductile iron ladle 14, a spheroidizing agent is filled into it in preparation for ductile iron production. For the empty gray iron ladle 15, an inoculant is filled into it in preparation for gray iron production. After filling, the roller drive motor 134 of the ladle pressing station 13 is started, rotating the sprocket 132. The power is transmitted through the chain 133 to drive the roller 131 to rotate, thus transporting the molten iron ladle placed on it.

[0041] Meanwhile, the roller drive motor 413 of the furnace-front liftable transfer cart 4 rotates, driving the sprocket 411 to rotate. The power is transmitted through the chain 412 to the roller 410, transferring the empty slab ladle 14 or empty gray slab ladle 15 to the furnace-front liftable transfer cart 4. After the transfer cart 4 receives the empty slab ladle, the baffle drive motor 416 starts, and the baffle shaft 415 drives the steering device 47, causing the baffle 414 to rotate and close, preventing the empty slab ladle from slipping off the roller conveyor. The travel drive motor 42 starts, transmitting the output torque to the travel wheels 41 through the transmission shaft 44 and coupling 43, causing the cart to move. The furnace-front liftable transfer cart 4 moves to the designated melting furnace 1 and automatically aligns with the furnace nozzle.

[0042] Based on the specifications of the melting furnace 1 and the ductile iron ladle 14 or gray iron ladle 15, the lifting height of the molten iron ladle is determined when its height is too low or it is not at the same level as the melting furnace. The lifting servo motor 46 starts, driving the ball screw 45 to rotate, raising the molten iron ladle to the designated height. The melting furnace 1 pours molten iron into the ladle, and the weighing sensor 417 provides real-time feedback on the weight of the molten iron poured into the ladle until the ladle reaches the designated weight, at which point pouring stops. The lifting servo motor 46 starts again, driving the ball screw 45 to rotate, lowering the molten iron ladle to the bottom or its original height.

[0043] The drive motor 42 starts, and through the transmission shaft 44 and coupling 43, the output torque is transmitted to the walking wheels 41 to move the trolley. The liftable transfer car 4 in front of the furnace moves to the designated position and aligns with the slag removal station 12. The motor drives the lower baffle 414 to open. Driven by their respective motors, the rollers 121 of the slag removal station and the rollers 410 of the transfer car 4 rotate simultaneously, transferring the slag ladle 14 or gray slag ladle 15 to the slag removal station 12 for slag removal. Meanwhile, the liftable transfer car 4 in front of the furnace moves to the ladle pressing station 13 to transfer the empty ladle.

[0044] The molten iron ladle is transferred from the slag removal station to the next station via the transfer car 5. The transfer car 5's drive motor 52 starts, transmitting torque to the traveling wheels 51 via the drive shaft 54 ​​and coupling 53, causing the car to move and align with the slag removal station 12. Driven by their respective motors, the rollers 121 of the slag removal station and the rollers 55 of the transfer car 5 rotate simultaneously, transferring the full molten iron ladle onto the transfer car 5. The baffle drive motor 511 starts, driving the baffle shaft 510 and the steering mechanism 612 to close the baffle 59. Based on the ductile iron ladle 14 / gray iron ladle 15, the transfer car 5 moves to the designated position.

[0045] Depending on whether the molten iron ladle ball 14 or gray iron ladle 15 is being transferred, the transfer system has the following two implementation methods.

[0046] 1. Transfer ball iron bag 14 When the transfer car 5 carrying the ductile iron ladle 14 travels to align with the fixed roller conveyor station 10, the baffle drive motor 511 starts, driving the baffle shaft 510 and the steering gear 612 to open the baffle 69. The respective roller drive motors of the transfer car 5 and the fixed roller conveyor station 10 start, and the rollers 55 and 101 rotate, moving the ductile iron ladle 14 onto the fixed roller conveyor station 10. After the ductile iron ladle 14 is transferred to the fixed roller conveyor station 10, the baffle drive motor 107 starts, driving the baffle shaft 106 and the steering gear 108 to close the baffle 105.

[0047] The roller drive motor 94 of the ductile iron ladle tilting device 9 starts, the roller 91 rotates, and the ductile iron ladle 14 is transferred onto the ductile iron ladle tilting device 9. The ductile iron ladle 14 enters the tilting support 96, as... Figure 3As shown. At this time, station 1 of the double-station casting machine ladle changing car 6 has a gray iron ladle 15 placed on it, and it is aligned with the ductile iron ladle tilting device 9. The tilting cylinder 95 is activated, and the cylinder pushes out to drive the tilting support 96 to tilt. The molten iron in the ductile iron ladle 14 is poured into the gray iron ladle 15.

[0048] After the ductile iron ladle 14 is emptied, the tilting cylinder 95 drops back, causing the ductile iron ladle 14 to return to the roller 91. The roller 91 of the tilting device 9 and the roller 101 of the fixed roller conveyor station rotate respectively, driving the ductile iron ladle 14 to move. At this time, the transfer car 5 is aligned with the fixed roller conveyor station 10, and their respective baffles 59 and 105 are in the open state. The ductile iron ladle 14 moves from the fixed roller conveyor station 10 to the transfer car 5, and the baffle 59 closes.

[0049] The transfer car 5, loaded with empty ductile iron ladles 14, moves to align with the pressing station 13. The baffle 59 opens, and the rollers 55 and 131 of the transfer car 5 and the pressing station rotate, moving the ductile iron ladle 14 onto the pressing station 13. Spheroidizing agent is then added to the ductile iron ladle 14, and the above process is repeated.

[0050] While the empty ductile iron ladle 14 is being transferred back, the drive motor 62 of the double-station casting machine ladle changing car 6 starts, the traveling wheels 61 rotate, and the double-station casting machine ladle changing car 6 moves towards the ladle opening device 11. After moving to the designated position, the gray iron ladle 15 is aligned with the gray iron ladle cover 151, the lifting cylinder 113 of the opening device 11 is activated, and the ladle cover lifting claw 114 lowers the gray iron ladle cover 151. Under the guidance and limiting action of the lifting guide wheel 112, the positioning guide column 152 ensures that the ladle cover is correctly placed on the molten iron ladle.

[0051] The double-station casting machine ladle-changing car 6 moves towards the casting machine 16 and reaches the designated position. The casting machine 16 picks up the molten iron ladle for casting. After casting is completed, the casting machine 16 returns the empty gray iron ladle 15 to station 2 of the double-station casting machine ladle-changing car 6. The double-station casting machine ladle-changing car 6 moves to the vicinity of the gray iron ladle tilting device 7, and its station 2 is aligned with the gray iron ladle tilting device 7. The baffle 69 of the ladle-changing car and the baffle 713 of the tilting device 7 open respectively, and the rollers 65 of the ladle-changing car and the rollers 79 of the tilting device 7 rotate respectively, transferring the gray iron ladle 15 from the ladle-changing car 6 to the gray iron ladle tilting device 7.

[0052] After the ladle 15 is in place, the baffle 713 closes. The horizontal fixing cylinder 73 is activated, driving the horizontal fixing claw 77 via the horizontal connecting shaft 76 to horizontally fix the ladle 15. The vertical fixing cylinder 74 is activated, and the vertical fixing claw 78 vertically fixes the ladle 15. The tilting cylinder 72 is activated, tilting the frame 75, and a small amount of remaining molten iron in the ladle 15 is poured into the waste slag hopper. Figure 4As shown. After emptying, the tilting cylinder 72 drives the tilting frame 75 back to a horizontal position. Simultaneously with the tilting device operating, the double-station casting machine ladle changing car 6 moves to station 1 and aligns with the ladle tilting device 7. The baffle 69 of the ladle changing car and the baffle 713 of the tilting device open, and the rollers 65 and 79 rotate, transferring the emptied ladle 15 to station 1 of the double-station casting machine ladle changing car 6. The baffle 69 then closes.

[0053] The double-station casting machine ladle changer 6 moves to the ladle opening device 11. During the movement, the lifting claw 114 of the ladle opening device 11 descends and aligns with the ladle cover 151. As the double-station casting machine ladle changer 6 moves, the ladle cover enters the lifting claw 114, and the double-station casting machine ladle changer 6 moves to the designated position. The lifting cylinder 113 of the opening device 11 drives the lifting frame 111, causing the ladle cover lifting claw 114 to rise, and the gray iron ladle cover 151 opens. The double-station casting machine ladle changer 6 then aligns its moving station 1 with the ductile iron ladle tilting device 9. The above process cycle continues.

[0054] 2. 15 gray iron bags for transfer The transfer car 5 carrying the molten iron ladle 15 aligns with the fixed roller conveyor station with the cover opening device 8, and the baffle 85 opens. The respective roller drive motors of the transfer car 5 and the fixed roller conveyor station with the cover opening device 8 start, and the rollers 55 and 81 rotate respectively, moving the molten iron ladle 15 onto the fixed roller conveyor station 10. During the movement, the ladle guide wheel 89 calibrates the position of the molten iron ladle 15, the ladle cover lifting claw 813 descends and aligns with the ladle cover, the ladle cover enters the lifting claw 813, and the molten iron ladle 15 stops in place.

[0055] The lifting cylinder 812 is activated, and the lifting frame 810 drives the cover lifting claw 813 to grab the cover 151 of the gray iron bag and lift it to the correct position. The baffle 85 of the fixed roller conveyor station with the cover opening device 8 opens, and its roller 81 and the roller 79 of the gray iron bag tilting device 7 rotate simultaneously, driving the gray iron bag 15 to move onto the gray iron bag tilting device 7.

[0056] Simultaneously, the ladle changing car 6 station 1 of the dual-station casting machine aligns with the gray iron ladle tilting device 7. The baffle 69 of the ladle changing car 6 and the baffle 713 of the tilting device 7 open, the rollers 65 and 79 rotate, and the gray iron ladle 15 is transferred to the ladle changing car 6 station 1 of the dual-station casting machine.

[0057] The double-station casting machine ladle changer 6 moves to the casting machine 16 and reaches the designated position. The casting machine 16 picks up the molten iron ladle for casting. While this gray iron ladle 15 is being transferred to station 1, another gray iron ladle 15 repeats the previous process to transport molten iron to station 1 of the double-station casting machine ladle changer 6.

[0058] After pouring is completed, the pouring machine 16 returns the gray iron ladle 15 to station 2 of the double-station pouring machine ladle changing car 6. The double-station pouring machine ladle changing car 6 moves, and station 2 aligns with the gray iron ladle tilting device 7. The baffle 69 of the ladle changing car 6 and the baffle 713 of the tilting device 7 open. The rollers 65 and 79 rotate, and the gray iron ladle 15 is transferred to the gray iron ladle tilting device 7. After the gray iron ladle 15 is in place, the baffle 713 closes.

[0059] Horizontal fixing cylinder 73 is activated, driving horizontal fixing claw 77 via horizontal connecting shaft 76 to horizontally fix ladle 15. Vertical fixing cylinder 74 is activated, driving vertical fixing claw 78 to vertically fix ladle 15. Tilting cylinder 72 is activated, tilting frame 75 tilts, and a small amount of remaining molten iron in ladle 15 is poured into waste slag hopper. After emptying, tilting cylinder 72 drives tilting frame 75 back to the horizontal position. At this time, baffle 85 of fixed roller conveyor with cover opening device 8 opens, and rollers 81 and 79 rotate simultaneously, moving ladle 15 to the designated position of fixed roller conveyor with cover opening device 8 and stopping. Lifting cylinder 812 is activated, lifting frame 810 drives ladle cover lifting claw 813 to grip ladle cover 151 and descend, positioning guide column 152 ensures the ladle cover is correctly placed on the molten iron ladle.

[0060] The transfer car 5 and the fixed roller conveyor station are equipped with a cover-opening device 8. The baffle 59 opens, and the gray iron ladle 15 moves onto the transfer car 5. The baffle 59 closes, aligning the transfer car 5 with the pressing station 13. The baffle 59 opens again, and the rollers 55 of the transfer car 5 and 131 of the pressing station rotate, moving the gray iron ladle 15 onto the pressing station 13. An inoculant is then added to the gray iron ladle 15, and the above process is repeated.

[0061] The control system 17 enables automatic operation of the roller conveyor and its components, achieving automated control of the entire system and reliably fulfilling the system's objectives. The wiring layout of the onboard control system and electrical control system must be designed to prevent molten iron from splashing onto the conveyor.

[0062] It should be noted that in this patent application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. In this patent application, if it refers to performing an action according to an element, it means performing the action at least according to that element, including two cases: performing the action only according to that element, and performing the action according to that element and other elements. Expressions such as "multiple," "repeatedly," and "various" include two, two times, two kinds, and more than two, more than two times, and more than two kinds.

[0063] This specification includes combinations of various embodiments described herein. Individual references to “one embodiment” or a particular embodiment, etc., do not necessarily refer to the same embodiment; however, these embodiments are not mutually exclusive unless indicated to be mutually exclusive or are readily apparent to those skilled in the art. It should be noted that the word “or” is used in a non-exclusive sense throughout this specification unless the context explicitly indicates or requires it.

[0064] All documents mentioned in this application are considered to be incorporated in their entirety into the disclosure of this application so that they can serve as a basis for modifications if necessary. Furthermore, it should be understood that after reading the foregoing disclosure of this application, those skilled in the art can make various alterations or modifications to this application, and these equivalent forms also fall within the scope of protection claimed in this application.

Claims

1. A molten iron transfer system that automatically switches between ductile iron ladles and gray iron ladles, characterized in that, include: The equipment includes: melting furnace, furnace front rail, casting rail, furnace front liftable transfer car, transfer car, double-station casting machine ladle changing car, gray iron ladle tilting device, fixed roller conveyor station with opening device, ductile iron ladle tilting device, fixed roller conveyor station, molten iron ladle opening device, slag removal station, and ladle pressing station. The melting furnace is configured to produce molten iron; The furnace front track is close to the melting furnace and extends along the arrangement direction of the melting furnace, for the transfer vehicle to reach or move away from the melting furnace; The pouring track extends close to the pouring machine for the transfer vehicle to or away from the pouring machine; the ladle opening device is located near the pouring track and includes ladle cover lifting claws; The furnace-front liftable transfer vehicle includes wheels for movement and a lifting mechanism for vertically displacing the molten iron ladle. The transfer car is mobile and can be used for the transfer of molten iron ladles. The double-station casting machine ladle changer includes two stations for accommodating molten iron ladles and is configured to travel on the casting track; In the area defined between the furnace front track and the casting track, the fixed roller station and the ductile iron ladle tilting device are arranged in sequence, forming a transfer route from the furnace front track to the casting track; the gray iron ladle tilting device and the fixed roller station with the cover opening device are arranged in sequence, forming a transfer route from the casting track to the furnace front track. The furnace-front liftable transfer vehicle also includes: a weighing mechanism, a roller mechanism, and a baffle mechanism; The roller mechanism includes a roller driven by a roller drive motor, the roller being configured to provide one-dimensional displacement to a ladle of molten iron located on a transfer car; The lifting mechanism includes a frame, a lifting servo motor, and a ball screw. On both sides of the frame, the lifting servo motor is configured to drive the ball screw. At least two pairs of guide wheels are provided on each side of the lifting mechanism. The guide wheels are embedded in the guide rails of the furnace front liftable transfer cart and slide up and down on the guide rails, so that the lifting mechanism can achieve longitudinal height displacement relative to the traveling wheels. The baffle mechanism is configured to limit or allow the passage of the molten iron ladle by changing the physical position of the baffle. The weighing mechanism is mounted on the lifting mechanism and configured to detect the weight of the molten iron ladle; The gray iron ladle tilting device includes a bottom frame, a tilting cylinder, a horizontal fixing cylinder, a horizontal fixing claw, a vertical fixing cylinder, a vertical fixing claw, and a tilting frame; wherein... The tilting frame includes rollers for carrying the molten iron ladle; the tilting cylinder is located below the bottom frame and is configured to provide lift to the bottom frame so that the bottom frame drives the molten iron ladle to tilt around the axis. The horizontal fixed cylinder is connected to the lower part of the tilting frame and distributed along the axial direction of the roller. The horizontal fixed claw is connected to the horizontal fixed cylinder and is configured to receive the driving force output by it. When tilting is performed, the molten iron ladle is clamped in the axial direction of the roller. The vertical fixing cylinder is connected to the lower part of the tilting frame and distributed along the direction of the roller arrangement. The vertical fixing claw is connected to the vertical fixing cylinder and is configured to receive the driving force output by it. When tilting is performed, it clamps the molten iron ladle in the direction of the roller arrangement.

2. The molten iron transfer system as described in claim 1, characterized in that, The fixed roller conveyor station with opening device includes a roller conveyor and a baffle mechanism that restricts or allows the passage of molten iron ladles in the direction along the roller conveyor. The roller conveyor also includes guide wheels for limiting the molten iron ladle on both sides; and a liftable ladle cover lifting claw is provided on one side of the roller conveyor.

3. The molten iron transfer system as described in claim 2, characterized in that, The bottom of the fixed roller conveyor station with the cover opening device includes a lifting frame, which is used to install a lifting mechanism that controls the lifting claw of the cover.

4. The molten iron transfer system as described in claim 1, characterized in that, The ductile iron ladle tilting device includes a tilting frame, a roller conveyor on the tilting frame, and a baffle mechanism that restricts or allows the passage of the molten iron ladle in the direction of travel along the roller conveyor. The ductile iron ladle tilting device also includes a tilting cylinder, a tilting frame, and a rotating shaft. The tilting cylinder is configured to tilt the tilting frame that carries the molten iron ladle.

5. The molten iron transfer system as described in claim 1, characterized in that, The ladle opening device includes a lifting frame, which is used to install the lifting mechanism of the ladle cover lifting claw.

6. The molten iron transfer system as described in claim 3 or 5, characterized in that, The lifting mechanism is limited by guide wheels and moves in the vertical direction.

7. The molten iron transfer system as described in claim 1, characterized in that, The slag removal station is located on one side of the extension direction of the furnace front track and is configured to remove slag from the molten iron ladle transported by the furnace front liftable transfer car.

8. The molten iron transfer system as described in claim 1, characterized in that, The ladle pressing station is located on one side of the furnace front track extension direction and is configured to provide ladle spheroidizing agent and / or fill inoculant for molten iron.

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