Four-bar linkage driven linkage type ladle cover

Abstract

The utility model discloses a four connecting rod drive linkage type molten iron transfer trolley cover belongs to steel production technical field, aims at solving existing cover drive different step by step easy deflection, poor sealing leads to molten iron cooling and smoke overflow, locking mechanism weak anti -jolt and easy to loosen and wear equipment problem, its technical scheme main points include the bottom with track wheel's transfer trolley body, and the molten iron tank is placed in the transfer trolley body top recess, and two mutually matched covers are used for closing the molten iron tank opening, four groups of drive parts drive cover opening and closing in twos, and each group of drive parts contains support frame, rotating plate, connecting rod and corresponding hydraulic steel, and four groups of locking parts contain extension plate, positioning bolt, and positioning bolt is equipped with fixed support, abutting bar and second spring, to realize the locking of the closed cover, to reduce the cover shaking and reduce the structure wear, the cover mechanism can realize two cover synchronous smooth opening and closing, reduce molten iron heat loss and smoke overflow, be applicable to the transfer operation of high temperature molten iron in steel production.

Description

Technical Field

[0001] This utility model relates to the field of steel production technology, and in particular to a four-link drive linkage type molten iron transfer car cover. Background Technology

[0002] In the steel production process, molten iron transfer cars play a crucial role in transferring high-temperature molten iron (typically reaching 1300-1500℃) from the blast furnace to the steelmaking workshop. The transfer distance often ranges from several hundred meters to over a kilometer. Heat loss during this process directly impacts the energy consumption and the stability of molten iron quality in subsequent steelmaking processes. To alleviate this problem, the industry commonly equips molten iron ladles with lids. However, existing lidding devices have revealed numerous unavoidable defects in practical applications: Some devices use only two sets of drive mechanisms to drive two ladle covers separately. Each set of drive mechanisms controls one side of the connecting rod independently, lacking a synchronous and stable structure. When the ladle covers are rotated, they are prone to tilting due to the uneven driving force on both sides. This results in a fitting error of more than 5mm between the edge of the ladle cover and the top opening of the molten iron ladle, leading to poor sealing. The temperature drop of the molten iron can reach 80-120℃ per hour, which not only increases the fuel consumption of subsequent smelting stages (an additional 3%-5% of coke is required for every 100℃ drop), but may also cause segregation of molten iron components due to excessively low temperatures. There is often a 2-3mm gap between the ladle lid and the outer wall of the molten iron ladle due to the roundness error of the ladle mouth or the deformation of the ladle lid. Moreover, most existing devices do not have a suitable sealing structure. The smoke and dust generated by the high temperature molten iron can easily overflow from the gap, pollute the workshop environment, and further accelerate the loss of heat. After the ladle is closed, the drive components are usually locked with a single pin or bolt, lacking an anti-loosening design. When the transfer car moves on the track, the bumps at the track joints (vibration amplitude can reach 3-5mm) can easily cause the pin to loosen and fall off or the bolt to strip, causing the ladle cover to shake. This not only damages the sealing effect, but may also cause the edge of the ladle cover to collide and wear with the mouth of the molten iron ladle, shortening the service life of the equipment.

[0003] To address the aforementioned problems, this utility model document proposes a four-link drive linkage type molten iron transfer car cover. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as the ladle cover being prone to tilting due to asynchronous driving, poor sealing leading to molten iron cooling and smoke overflow, and the locking mechanism being weak in shock resistance, easily falling off and loosening, which will aggravate equipment wear. Therefore, a four-link drive linkage type ladle cover for molten iron transfer cars is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A four-link drive linkage molten iron transfer car ladle cover, comprising: The transfer vehicle body has multiple track wheels rotatably mounted at the bottom near both ends to enable movement of the transfer vehicle body on corresponding tracks; the top of the transfer vehicle body has a molten iron ladle placed through a groove for holding molten iron. It also includes two lids, which cooperate with each other to cover and seal the top opening of the molten iron ladle, so as to slow down the heat loss of the molten iron inside the ladle. It also includes four sets of drive units, which work in pairs to open and close the two covers respectively; It also includes four sets of locking parts, which are used to lock the corresponding drive parts to ensure that the two lids do not shake due to bumps during the process of closing the opening at the top of the molten iron ladle.

[0006] In one possible design, the drive unit includes a support frame fixedly mounted on one side of the transport vehicle body. A rotating plate is provided inside the support frame, and a hinged column is fixedly passed through the interior of the rotating plate. The two ends of the hinged column are hinged to the support frame. A connecting rod is fixedly mounted on one end of the rotating plate, and the other end of the connecting rod is fixedly connected to one side of the cover. A common connecting rod is fixedly installed between two connecting rods connected to the same side of the cover to ensure the structural stability between adjacent connecting rods.

[0007] In one possible design, the drive unit further includes a first rotating frame hinged to one side of the support frame, a hydraulic cylinder fixedly mounted on one side of the first rotating frame, and a second rotating frame fixedly mounted on one end of the piston rod of the hydraulic cylinder; a hinged bracket is fixedly mounted on one side of the rotating plate, and the second rotating frame is hinged to the hinged bracket to complete the drive rotation of the rotating plate.

[0008] In one possible design, L-shaped fixing plates are fixedly installed on the opposite sides of the two ladle covers. Arc-shaped baffles are provided below each of the two ladle covers. Two guide rods are fixedly installed on one side of each of the two arc-shaped baffles, with one end of each guide rod slidingly penetrating one side of the adjacent L-shaped fixing plate. A first spring is fitted onto the outer wall of each of the two guide rods. One end of each first spring is fixedly connected to one side of the adjacent arc-shaped baffle via a spring seat, and the other end of each first spring is fixedly connected to one side of the L-shaped fixing plate via a spring seat. Both arc-shaped baffles slide against the bottom of the adjacent ladle covers and are in close contact with the outer wall of the molten iron ladle, thus covering the gap between the ladle covers and the molten iron ladle.

[0009] In one possible design, the locking part includes an extension plate fixedly installed at one end of the rotating plate, and a positioning pin slidably passes through the extension plate near one end; positioning holes are provided on both sides of the transfer vehicle body, and one end of the positioning pin extends into the corresponding positioning hole to complete the locking of the corresponding rotating plate.

[0010] In one possible design, the locking part further includes a fixing bracket fixedly installed on the other end of the positioning pin. The positioning pin is L-shaped, and an abutment rod is provided on one side of the positioning pin. One end of the abutment rod slides through the fixing bracket and is fixedly installed with a fixing collar. The fixing collar is located inside the fixing bracket. A second spring is sleeved on the outer wall of the abutment rod. One end of the second spring is fixedly connected to one side of the fixing collar through a spring seat, and the other end of the second spring is fixedly connected to one side of the fixing bracket through a spring seat. The other end of the abutment rod abuts against an adjacent extension plate to limit the positioning pin and prevent the positioning pin from accidentally falling off.

[0011] In one possible design, the end of the positioning pin near the fixed bracket is fixedly fitted with an abutment collar to facilitate the provision of corresponding force support when the abutment rod is pulled.

[0012] In this application, when using the four-link drive linkage molten iron transfer car cover, the transfer car body can move on the corresponding track through the bottom track wheels, and the molten iron ladle is pre-placed in the groove on the top of the transfer car body to complete the loading preparation of molten iron. When it is necessary to close the top opening of the molten iron ladle, the hydraulic cylinder of the drive unit is activated. The piston rod of the hydraulic cylinder extends outward, driving the second rotating frame to rotate. The second rotating frame is hinged to the hinged bracket, which in turn pushes the rotating plate to rotate around the hinged column inside the support frame. The rotating plate drives the connecting rod to move synchronously. The connecting rods on both sides of the same ladle cover maintain structural stability through the connecting rod, so that the two connecting rods drive the ladle cover to rotate towards the top of the molten iron ladle synchronously. The two sets of drive units drive the two ladle covers to move closer to each other, gradually covering the top opening of the molten iron ladle. As the ladle lid moves toward the molten iron ladle, the arc-shaped baffle will first contact the outer wall of the molten iron ladle. As the ladle lid continues to rotate, the guide rod slides inside the L-shaped fixed plate, and the first spring is compressed. Under the elastic force of the first spring, the arc-shaped baffle always stays close to the outer wall of the molten iron ladle until the two ladle lids cooperate to completely seal the top opening of the molten iron ladle. At this time, the arc-shaped baffle covers the gap between the ladle lid and the molten iron ladle, reducing the heat loss of the molten iron in the ladle. After the ladle is sealed with the lid, the operator can insert a positioning pin, so that one end of the positioning pin is inserted into the positioning hole of the transfer car body to lock the rotating plate. This prevents the rotating plate from rotating due to bumps during the movement of the transfer car body, thereby preventing the ladle lid from shaking. It can also reduce the pressure on the hydraulic cylinder. The abutment rod on one side of the positioning pin can be pressed tightly against the positioning pin under the action of the second spring. The abutment rod can continuously abut against the adjacent extension plate to prevent the positioning pin from accidentally falling off. When it is necessary to open the ladle cover, first pull the abutment rod to release the limit of the positioning pin, then pull the positioning pin out of the positioning hole to release the lock on the rotating plate; start the hydraulic cylinder to retract its piston rod, drive the second rotating frame to rotate in the opposite direction, and then pull the rotating plate to rotate in the opposite direction around the hinge column. The rotating plate drives the ladle cover to rotate away from the molten iron ladle through the connecting rod, and the two ladle covers separate from each other, gradually opening the top opening of the molten iron ladle. After that, operations such as taking out molten iron or adding material to the molten iron ladle can be carried out.

[0013] Beneficial effects: In this utility model, the four-link drive linkage type molten iron transfer car ladle cover, the device drives two ladle covers in pairs through four sets of drive units. The connecting rods on both sides of the same ladle cover maintain structural stability through connecting rods. During the drive process, the ladle covers can rotate synchronously towards the top of the molten iron ladle, avoiding tilting due to uneven force, ensuring precise matching of the two ladle covers, realizing reliable sealing of the top opening of the molten iron ladle, and reducing the basic hidden danger of heat loss of molten iron; In this utility model, the ladle cover of the four-link drive linkage molten iron transfer car is equipped with an arc-shaped baffle that works in conjunction with a first spring and a guide rod. During the process of the ladle cover moving towards the molten iron ladle to be completely closed, the arc-shaped baffle can first contact the outer wall of the molten iron ladle. When the ladle cover rotates, the guide rod slides and compresses the first spring. With the help of the elastic force of the first spring, the arc-shaped baffle is always in close contact with the outer wall of the molten iron ladle, effectively covering the gap between the ladle cover and the molten iron ladle, and further reducing the rate of heat loss of the molten iron. In this utility model, the four-link drive linkage molten iron transfer car cover has four sets of locking parts that can form a double lock on the corresponding drive parts: the positioning pin inserted into the positioning hole of the transfer car body can lock the rotating plate, preventing the rotating plate from rotating due to transfer bumps and thus causing the cover to shake; the abutting rod abuts against the extension plate under the action of the second spring, which can prevent the positioning pin from accidentally falling off, ensure the stability of the locking state, and at the same time reduce the continuous pressure on the hydraulic cylinder and extend the service life of the drive components; In this utility model, the ladle cover of the four-link drive linkage molten iron transfer car has track wheels at the bottom of the transfer car body to facilitate stable movement on the corresponding track, and the groove at the top can position the molten iron ladle to prevent the molten iron ladle from shifting during the transfer process; when the ladle cover is opened, the abutment rod limit is released first and then the positioning pin is pulled out, the hydraulic cylinder retracts and drives the ladle cover to rotate smoothly in the opposite direction, the operation process is smooth, it is convenient for subsequent molten iron to be taken out or molten iron ladle to be filled, and the overall operation efficiency is improved. In this invention, the device uses four sets of drive units that work in pairs to move the corresponding ladle covers. The connecting rods on both sides of the same ladle cover are kept stable by connecting rods to prevent tilting and reliably seal the molten iron ladle, reducing heat loss of the molten iron. The arc-shaped baffle, in conjunction with the guide rod and the first spring, can fit tightly against the ladle wall and cover the gaps, further reducing heat loss. The four sets of locking units use double locking to prevent the ladle covers from shaking and the pins from falling off, and can also reduce the pressure on the hydraulic cylinder. The track wheel assists in completing stable movement, and the ladle cover opening operation is smooth and simple, which can improve the efficiency of molten iron transfer. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of a four-link drive linkage type molten iron transfer car cover proposed in this utility model. Figure 2 This is a side view of the cover structure of a four-link drive linkage molten iron transfer car proposed in this utility model. Figure 3 This is a schematic diagram of the ladle cover opening state of a four-link drive linkage molten iron transfer car according to the present invention. Figure 4 This is a schematic diagram of the drive unit structure of a four-link drive linkage molten iron transfer car cover proposed in this utility model. Figure 5 This is a schematic diagram of the arc-shaped baffle installation structure of the ladle cover of a four-link drive linkage molten iron transfer car proposed in this utility model. Figure 6 This is a schematic diagram of the positioning pin structure of the cover of a four-link drive linkage molten iron transfer car proposed in this utility model.

[0015] In the diagram: 1. Transfer vehicle body; 2. Track wheel; 3. Molten iron ladle; 4. Ladle cover; 5. Connecting rod; 6. Rotating plate; 7. Support frame; 8. Arc-shaped baffle; 9. Positioning hole; 10. Hinge column; 11. Hinge bracket; 12. Extension plate; 13. Positioning pin; 14. First rotating frame; 15. Hydraulic cylinder; 16. Second rotating frame; 17. L-shaped fixing plate; 18. Guide rod; 19. First spring; 20. Fixing bracket; 21. Abutment rod; 22. Fixing collar; 23. Second spring; 24. Abutment collar. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] In one embodiment: Refer to Figure 1-6A molten iron transfer car cover includes: a transfer car body 1, a cover 4, a drive unit, and a locking unit, among other core components.

[0018] In this embodiment, multiple track wheels 2 are rotatably mounted at both ends of the bottom of the transfer vehicle body 1. The transfer vehicle body 1 can be moved by the cooperation of the track wheels 2 with the track. A groove is provided on the top of the transfer vehicle body 1, and the molten iron ladle 3 is placed in the groove to hold the molten iron.

[0019] Furthermore, in this embodiment, there are two lids 4, which work together to cover and seal the top opening of the molten iron ladle 3, so as to reduce the heat loss of the molten iron inside the ladle 3.

[0020] In this embodiment, there are four sets of drive units, which cooperate in pairs to control the opening and closing of two covers 4 respectively. Each set of drive units includes a support frame 7 fixed to one side of the transfer vehicle body 1. A rotating plate 6 is set inside the support frame 7. A through hinge column 10 is fixed inside the rotating plate 6. The two ends of the hinge column 10 are hinged to the support frame 7. A connecting rod 5 is fixedly installed at one end of the rotating plate 6. The other end of the connecting rod 5 is fixedly connected to one side of the cover 4. The same connecting rod is fixedly installed between two connecting rods 5 connected to the same side of the cover 4 to ensure the structural stability between two adjacent connecting rods 5.

[0021] In this embodiment, there are four sets of locking parts, which are used to lock the drive part and prevent the lid 4 from shaking due to bumps during the process of closing the top opening of the molten iron ladle 3. Each set of locking parts includes an extension plate 12 fixedly installed at one end of the rotating plate 6. The extension plate 12 slides through a positioning pin 13 near one end. Positioning holes 9 are opened on both sides of the transfer car body 1. One end of the positioning pin 13 extends into the corresponding positioning hole 9 to complete the locking of the rotating plate 6.

[0022] This application can be used in the field of steel production technology, or in other fields applicable to this application.

[0023] In another embodiment: Reference Figure 1 , 4 5, 6, A four-link drive linkage type molten iron transfer car cover, which is applied to the field of steel production technology; the structure of this embodiment is basically the same as the aforementioned embodiments, the difference being: Furthermore, in this embodiment, the drive unit also includes a first rotating frame 14 hinged to one side of the support frame 7, a hydraulic cylinder 15 fixedly mounted on one side of the first rotating frame 14, and a second rotating frame 16 fixedly mounted on one end of the piston rod of the hydraulic cylinder 15; a hinge bracket 11 fixedly mounted on one side of the rotating plate 6, and the second rotating frame 16 is hinged to the hinge bracket 11; when the piston rod of the hydraulic cylinder 15 extends or retracts, the second rotating frame 16 and the hinge bracket 11 drive the rotating plate 6 to rotate around the hinge column 10, thereby driving the cover 4 to open or close through the connecting rod 5.

[0024] Furthermore, in this embodiment, the locking part also includes a fixing bracket 20 fixedly installed on the other end of the positioning pin 13. The positioning pin 13 is L-shaped. An abutment rod 21 is provided on one side of the positioning pin 13. One end of the abutment rod 21 slides through the fixing bracket 20 and is fixedly installed with a fixing collar 22, which is located inside the fixing bracket 20. A second spring 23 is sleeved on the outer wall of the abutment rod 21. The two ends of the second spring 23 are fixedly connected to the fixing collar 22 and the fixing bracket 20 respectively through spring seats. The other end of the abutment rod 21 abuts against the adjacent extension plate 12 to limit the positioning pin 13 and prevent the positioning pin 13 from accidentally falling off. Furthermore, in this embodiment, L-shaped fixing plates 17 are fixedly installed on the side of each of the two ladles 4 away from each other, and arc-shaped baffles 8 are provided below the ladles 4; two guide rods 18 are fixedly installed on one side of each arc-shaped baffle 8, and one end of the guide rod 18 slides through one side of the adjacent L-shaped fixing plate 17; a first spring 19 is sleeved on the outer wall of the guide rod 18, and the two ends of the first spring 19 are fixedly connected to the arc-shaped baffle 8 and the L-shaped fixing plate 17 respectively through spring seats; the arc-shaped baffle 8 slides with the bottom of the adjacent ladles 4, and the arc-shaped baffle 8 is close to the outer wall of the molten iron ladle 3, which can cover the gap between the ladles 4 and the molten iron ladle 3, thereby further slowing down the rate of heat loss of the molten iron in the molten iron ladle 3.

[0025] In this embodiment, a retaining collar 24 is fixedly sleeved on one end of the positioning pin 13 near the fixed bracket 20 to provide force support when the retaining rod 21 is pulled.

[0026] However, as is well known to those skilled in the art, the working principle and wiring method of the hydraulic cylinder 15 are conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selection according to their needs or convenience.

[0027] The working principle and usage process of this technical solution are as follows: When using the four-link drive linkage molten iron transfer car cover, the transfer car body 1 can move on the corresponding track through the bottom track wheel 2, and the molten iron ladle 3 is placed in the groove on the top of the transfer car body 1 in advance to complete the loading preparation of molten iron. When it is necessary to close the top opening of the molten iron ladle 3, the hydraulic cylinder 15 of the drive unit is activated. The piston rod of the hydraulic cylinder 15 extends outward, driving the second rotating frame 16 to rotate. The second rotating frame 16 is hinged to the hinge bracket 11, thereby pushing the rotating plate 6 to rotate around the hinge column 10 inside the support frame 7. The rotating plate 6 drives the connecting rod 5 to move synchronously. The connecting rods 5 on both sides of the same ladle cover 4 maintain structural stability through the connecting rod, so that the two connecting rods 5 synchronously drive the ladle cover 4 to rotate towards the top of the molten iron ladle 3. The two sets of drive units drive the two ladle covers 4 to move closer to each other, gradually covering the top opening of the molten iron ladle 3. As the ladle cover 4 moves toward the molten iron ladle 3, the arc-shaped baffle 8 will first contact the outer wall of the molten iron ladle 3. As the ladle cover 4 continues to rotate, the guide rod 18 slides inside the L-shaped fixing plate 17, and the first spring 19 is compressed. Under the elastic force of the first spring 19, the arc-shaped baffle 8 always sticks tightly to the outer wall of the molten iron ladle 3 until the two ladle covers 4 cooperate to completely seal the top opening of the molten iron ladle 3. At this time, the arc-shaped baffle 8 covers the gap between the ladle cover 4 and the molten iron ladle 3, reducing the heat loss of the molten iron in the molten iron ladle 3. After the ladle cover 4 seals the molten iron ladle 3, the operator can insert the positioning pin 13, so that one end of the positioning pin 13 is inserted into the positioning hole 9 of the transfer car body 1, thereby locking the rotating plate 6 and preventing the rotating plate 6 from rotating due to bumps during the movement of the transfer car body 1, thus preventing the ladle cover 4 from shaking. At the same time, it can also reduce the pressure on the hydraulic cylinder 15. The abutment rod 21 on one side of the positioning pin 13 can be pressed tightly against the positioning pin 13 under the action of the second spring 23. The abutment rod 21 can continuously abut against the adjacent extension plate 12 to prevent the positioning pin 13 from accidentally falling off. When it is necessary to open the ladle cover 4, first pull the abutment rod 21 to release the limit of the positioning pin 13, and then pull the positioning pin 13 out of the positioning hole 9 to release the lock on the rotating plate 6; start the hydraulic cylinder 15 to retract its piston rod, drive the second rotating frame 16 to rotate in the opposite direction, and then pull the rotating plate 6 to rotate in the opposite direction around the hinge column 10. The rotating plate 6 drives the ladle cover 4 to rotate away from the molten iron ladle 3 through the connecting rod 5. The two ladle covers 4 separate from each other, and gradually open the top opening of the molten iron ladle 3. Then, operations such as taking out molten iron or adding material to the molten iron ladle 3 can be carried out.

[0028] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A ladle cover for a four-link drive linkage type molten iron transfer car, characterized in that, include: The transfer car body (1) has multiple track wheels (2) rotatably installed at the bottom of the transfer car body (1) near both ends to complete the movement of the transfer car body (1) on the corresponding track; the top of the transfer car body (1) has a molten iron ladle (3) placed through a groove, and the molten iron ladle (3) is used to place molten iron. It also includes two lids (4), which cooperate with each other and are used to cover and seal the top opening of the molten iron ladle (3) to slow down the heat loss of the molten iron in the ladle (3); It also includes four sets of drive units, which work together in pairs to open and close the two covers (4) respectively; It also includes four sets of locking parts, which are used to lock the corresponding drive parts to ensure that the two lids (4) do not shake due to bumps during the process of closing the top opening of the molten iron ladle (3).

2. The ladle cover of a four-link drive linkage molten iron transfer car according to claim 1, characterized in that, The drive unit includes a support frame (7) fixedly installed on one side of the transport vehicle body (1). A rotating plate (6) is provided inside the support frame (7). A hinge column (10) is fixedly inserted inside the rotating plate (6). Both ends of the hinge column (10) are hinged to the support frame (7). A connecting rod (5) is fixedly installed at one end of the rotating plate (6). The other end of the connecting rod (5) is fixedly connected to one side of the cover (4). The same connecting rod is fixedly installed between two connecting rods (5) connected to the same side of the cover (4) to ensure the structural stability between two adjacent connecting rods (5).

3. The ladle cover of a four-link drive linkage molten iron transfer car according to claim 2, characterized in that, The drive unit also includes a first rotating frame (14) hinged to one side of the support frame (7), a hydraulic cylinder (15) fixedly installed on one side of the first rotating frame (14), and a second rotating frame (16) fixedly installed at one end of the piston rod of the hydraulic cylinder (15); a hinge bracket (11) is fixedly installed on one side of the rotating plate (6), and the second rotating frame (16) is hinged to the hinge bracket (11) to complete the drive rotation of the rotating plate (6).

4. The ladle cover of a four-link drive linkage molten iron transfer car according to claim 1, characterized in that, L-shaped fixing plates (17) are fixedly installed on the opposite sides of the two lids (4). Arc-shaped baffles (8) are provided below the two lids (4). Two guide rods (18) are fixedly installed on one side of the two arc-shaped baffles (8). One end of the two guide rods (18) slides through one side of the adjacent L-shaped fixing plate (17). The outer wall of the two guide rods (18) is fitted with a first spring (19). One end of the two first springs (19) is fixedly connected to one side of the adjacent arc-shaped baffle (8) through a spring seat. The other end of the two first springs (19) is fixedly connected to one side of the L-shaped fixing plate (17) through a spring seat. The two arc-shaped baffles (8) slide with the bottom of the adjacent lids (4) and are in close contact with the outer wall of the molten iron ladle (3). They are used to cover the gap between the lids (4) and the molten iron ladle (3).

5. The ladle cover of a four-link drive linkage molten iron transfer car according to claim 1, characterized in that, The locking part includes an extension plate (12) fixedly installed at one end of the rotating plate (6), and a positioning pin (13) is slidably inserted through the extension plate (12) near one end; positioning holes (9) are provided on both sides of the transfer vehicle body (1), and one end of the positioning pin (13) extends into the corresponding positioning hole (9) to complete the locking of the corresponding rotating plate (6).

6. The ladle cover of a four-link drive linkage molten iron transfer car according to claim 5, characterized in that, The locking part also includes a fixed bracket (20) fixedly installed on the other end of the positioning pin (13). The positioning pin (13) is L-shaped. A stop rod (21) is provided on one side of the positioning pin (13). One end of the stop rod (21) slides through the fixed bracket (20) and is fixedly installed with a fixing collar (22). The fixing collar (22) is located inside the fixed bracket (20). A second spring (23) is sleeved on the outer wall of the stop rod (21). One end of the second spring (23) is fixedly connected to one side of the fixing collar (22) through a spring seat. The other end of the second spring (23) is fixedly connected to one side of the fixed bracket (20) through a spring seat. The other end of the stop rod (21) abuts against the adjacent extension plate (12) to complete the limiting of the positioning pin (13) and prevent the positioning pin (13) from falling off accidentally.

7. The ladle cover of a four-link drive linkage molten iron transfer car according to claim 6, characterized in that, The positioning pin (13) is fixedly fitted with an abutment collar (24) at one end near the fixed bracket (20) to provide corresponding force support when the abutment rod (21) is pulled.

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