Anode tray lifting mechanism

Abstract

The utility model belongs to the field of electrolytic aluminium, specifically provides a kind of anode tray hoisting mechanism.The mechanism includes lifting frame and lifting drive mechanism, lifting drive mechanism is used to be installed on the crane of changing pole, its lifting output end is connected with lifting frame to drive lifting frame to lift, lifting frame is equipped with the disc device for grabbing tray for grabbing, when changing pole, tray hoisting mechanism can be grabbed tray by disc device, lifting drive mechanism drives lifting frame to lift tray to set height, and move along with crane of changing pole, lifting frame is equipped with the passageway for crane of changing pole on the crane of changing pole to enter to take away or put into anode.In the process of changing pole, the crane of changing pole can place residual pole on tray by the passageway on lifting frame, and take away new pole on tray, this process crane of changing pole and the crane of changing pole do not need to move in large range, improve the safety of changing pole operation.

Description

Technical Field

[0001] This utility model belongs to the field of electrolytic aluminum, and in particular relates to an anode tray lifting mechanism. Background Technology

[0002] In the electrolytic aluminum production process, the carbon block of the anode guide rod will burn out and become a residual electrode after a period of use (usually 25-30 days), requiring replacement. Currently, a multi-functional electrode-changing overhead crane is typically used for anode replacement. The overhead crane has an electrode-changing cart and an electrode-changing mechanism. The overhead crane can move along the arrangement of the electrolytic cells in the workshop from the top of the electrolytic cell building, moving the electrode-changing cart between different electrolytic cells to switch positions. The electrode-changing cart can move along the length of the electrolytic cell on the overhead crane, moving the electrode-changing mechanism between different anodes to switch positions. The electrode-changing mechanism has a vertically movable electrode-changing output end, which can lift out the residual electrode and install the new electrode, completing the anode replacement.

[0003] During electrode replacement operations, a tray is typically used. The new anode to be installed (referred to as the new electrode) is placed on the tray beforehand, and the residual anode (referred to as the residual electrode) removed by the electrode replacement vehicle can be transferred to the tray. The current standard practice is to place the tray on the workshop floor on the side of the aluminum outlet of the electrolytic cell. This means that during electrode replacement operations, the electrode replacement vehicle needs to be moved extensively to remove the residual electrode and transfer it to the tray, as well as to remove the new electrode from the tray. Consequently, the new electrode and the residual electrode also need to be moved extensively, which compromises the safety of the operation. Utility Model Content

[0004] The purpose of this utility model is to provide an anode tray lifting mechanism to solve the technical problem of low operational safety caused by the large-scale movement of the electrode replacement vehicle during electrode replacement operations in the prior art.

[0005] To achieve the above objectives, the technical solution of the anode tray lifting mechanism provided by this utility model is as follows: An anode tray lifting mechanism for a polarity-changing overhead crane includes a lifting frame and a lifting drive mechanism. The lifting drive mechanism is installed on the polarity-changing overhead crane, and its lifting output end is connected to the lifting frame to drive the lifting frame to lift. The lifting frame is provided with a gripping device for gripping the tray. During polarity changing, the tray lifting mechanism can grip the tray through the gripping device and drive the lifting frame through the lifting drive mechanism to lift the tray to a set height, and move with the polarity-changing overhead crane. The lifting frame is provided with a channel for the polarity-changing trolley on the polarity-changing overhead crane to enter to take away or put in the anode.

[0006] As a further improvement, the pallet gripping device includes at least two pairs of swingable hooks mounted on a lifting frame to grip and release the pallet by controlling the opening and closing of the hooks.

[0007] As a further improvement, each claw in each pair of claws is independently hinged to the lifting frame, and each claw is equipped with a claw driver that drives the claw to swing open and close.

[0008] As a further improvement, the grappling hook actuator is a telescopic actuator, with its two ends hinged to the grappling hook and the lifting frame, respectively.

[0009] As a further improvement, the telescopic actuator is a telescopic electro-hydraulic actuator.

[0010] As a further improvement, the lifting drive mechanism includes multiple sets of lifting electro-hydraulic actuators, one end of which is connected to the lifting frame, and the other end is used for installation and connection with the pole-changing overhead crane.

[0011] As a further improvement, the lifting electro-hydraulic actuator is equipped with 4-6 sets.

[0012] As a further improvement, the gripping device includes two pairs of openable and closable hooks, with the two pairs of hooks respectively located at both ends of the lifting frame along the hook swing axis.

[0013] This utility model innovatively provides an anode tray lifting mechanism that can be installed on an electrolytic cell electrode changing trolley. Its beneficial effects are: when the anode tray lifting mechanism is applied to the electrolytic cell electrode changing trolley, the tray can be lifted by controlling the lifting frame and the gripping device, and moved with the electrode changing trolley. This allows the tray to move with the electrode changing trolley during the electrode changing process. During the electrode changing process, the electrode changing trolley can place the residual electrode on the tray through the channel on the lifting frame and remove the new electrode from the tray. In this process, the electrode changing trolley and the electrode changing trolley do not need to move a large range. It can be understood as configuring a storage space for temporary anodes (including new and residual electrodes) on the electrode changing trolley, thereby improving the safety of the electrode changing operation. Attached Figure Description

[0014] Figure 1 This is a front view of the embodiment of the anode tray lifting mechanism of this utility model when applied to a pole changing crane; Figure 2 This is a side view of the embodiment of the anode tray lifting mechanism of this utility model when applied to a pole changing crane; Figure 3 for Figure 1 Top view of the main frame and pole-changing device of the pole-changing crane; Figure 4 This is a front view of an embodiment of the anode tray lifting mechanism of this utility model; Figure 5 This is a side view of an embodiment of the anode tray lifting mechanism of this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Workshop / Plant; 2. Purification Unit; 3. Main Frame; 4. Residual Electrolytic Cell Cart; 5. New Electrolytic Cell Cart; 6. Pallet Lifting Mechanism; 7. Roller Shutter Mechanism; 8. Pallet; 9. Pallet Placement Position; 10. Top Isolation Cover; 11. Electrolytic Cell; 12. Residual Electrolytic Cell Cart Beam; 13. Traveling Wheels; 14. Guide Wheels; 15. New Electrolytic Cell Cart Beam; 101. Guide Rail; 301. Crossbeam; 302. Longitudinal Beam; 601. Lifting Drive Mechanism; 602. Lifting Frame; 603. Telescopic Drive Mechanism; 604. Hook; 801. Hooking and Lifting Part; 1101. Electrolytic Cell Exhaust Pipe. Detailed Implementation

[0016] To improve the safety of electrode replacement operations, the basic concept of this utility model is to configure a storage space on the electrode replacement crane to store anodes (including new and residual electrodes). Specifically, an anode tray lifting mechanism that can be configured on the electrode replacement crane is provided. The anode tray lifting mechanism can lift the tray and move with the electrode replacement crane. During the electrode replacement process, the electrode replacement crane can place the residual electrode on the tray through the channel on the lifting frame and remove the new electrode from the tray. During this process, the electrode replacement crane and the electrode replacement crane do not need to move a large range, thus improving the safety of the operation.

[0017] Based on the above concept, the present invention will be further described in detail below with reference to the embodiments.

[0018] The anode tray lifting mechanism (hereinafter referred to as the tray lifting mechanism) provided in this embodiment can be applied to, for example... Figure 1 and Figure 2 The electrolytic cell electrode-changing crane shown (hereinafter referred to as the electrode-changing crane) can be used as a whole to form an electrolytic cell electrode-changing system (hereinafter referred to as the electrode-changing system).

[0019] To facilitate understanding, we will first introduce the electrode-changing overhead crane. The electrode-changing overhead crane can be installed at the top of workshop building 1 in the electrolytic cell workshop. Specifically, the electrode-changing overhead crane includes a main frame 3, which can be understood as the basic frame of the overhead crane or the main beam of the crane. Other parts can be directly or indirectly assembled onto the main frame 3. When the main frame 3 is in use, i.e., when the electrode-changing overhead crane is installed in workshop building 1, the main frame 3 can be arranged on the top of workshop building 1 and can be moved horizontally along the top of workshop building 1. The direction of the horizontal movement of the main frame 3 is parallel to the arrangement direction within the workshop. Figure 2 The left and right directions shown allow the electrode replacement crane to be moved from a certain location to above the electrolytic cell 11 where the anode needs to be replaced. Specifically, a guide rail 101 is provided in the upper part of the workshop 1, and the main frame 3 is equipped with rollers that can move along the guide rail 101. A drive mechanism is also provided on the main frame 3. The specific movement method can refer to the movement method of the existing bridge crane (overhead crane) on the top of the workshop, and no specific restrictions are made here.

[0020] The main frame 3 is equipped with an electrode-changing device, which can be understood as a device for replacing the anode. This device is movable relative to the main frame 3, so that after the main frame 3 moves to the position of the corresponding electrolytic cell 11, the electrode-changing device moves relative to the main frame 3 to the cell number to be replaced. At its most basic level, the electrode-changing device includes an electrode-changing cart. The overall structure of the electrode-changing cart can be consistent with existing technology, specifically including clamps, a torsion mechanism, etc., which can remove the residual electrode and place the new electrode; details will not be provided here.

[0021] like Figures 1-3 As shown, the main frame 3 includes two crossbeams 301 and two longitudinal beams 302. The two ends of the crossbeams 301 are connected to the two longitudinal beams 302, and the two ends of the longitudinal beams 302 are connected to the crossbeams 301. In other words, the crossbeams 301 and longitudinal beams 302 together form a closed (U-shaped) frame structure. The extension direction of the crossbeams 301 is configured to be parallel to the length direction of the electrolytic cell 11. Naturally, the longitudinal beams 302 are perpendicular to the crossbeams 301. The relevant traveling mechanism supporting the main frame 3 to move along the top of the workshop building 1 can be mounted on the crossbeams 301. Preferably, the cross-sectional area of ​​the crossbeams 301 can be configured to be larger than the cross-sectional area of ​​the longitudinal beams 302 to improve the strength of the crossbeams 301.

[0022] The pallet lifting mechanism 6 can be mounted on the main frame 3 during use. Specifically, the pallet lifting mechanism 6 includes a lifting frame 602 and a lifting drive mechanism 601. The lifting drive mechanism 601 is used to install on the electrode changing trolley, specifically on the main frame 3. It is easy to understand that the lifting drive mechanism 601 has a lifting output end capable of outputting lifting motion. The lifting output end of the lifting drive mechanism 601 is connected to the lifting frame 602 and can drive the lifting frame 602 to rise and fall. The lifting frame 602 is equipped with a gripping device for grabbing the pallet. During electrode changing, the pallet lifting mechanism 6 can grab the pallet 8 located at the pallet placement position 9 on the aluminum outlet side of the electrolytic cell 11 in the workshop 1 through the gripping device, and move along with the electrolytic cell electrode changing trolley. At the same time, the lifting frame is provided with a channel for the electrode changing trolley to enter and remove the anode (new electrode) from the pallet 8 or place the anode (residual electrode).

[0023] During pole changing, the new pole to be replaced can be placed on tray 8 in advance, and tray lifting mechanism 6 can lift tray 8 containing the new pole. After removing the residual pole, the pole changing device can place the residual pole on tray 8 and remove the new pole from tray 8 to complete the replacement. In other words, the travel distance of the pole changing device is sufficient to place the residual pole on tray 8 and remove the new pole from tray 8 for replacement.

[0024] As can be seen from the above analysis, when using the pallet lifting mechanism 6 in this embodiment, the pole changing crane and pole changing car do not need to move a large range during the pole changing process. It can be understood that a storage space for temporary anodes (including new and residual anodes) is configured on the pole changing crane, thereby improving the safety of pole changing operations.

[0025] As a preferred implementation method, such as Figure 4 and Figure 5 As shown, the pallet lifting mechanism 6 is equipped with a pallet gripping device including two pairs of hooks 604 mounted on the lifting frame. Each pair of hooks 604 contains two hooks 604 that can swing open and close. Thus, the pallet 8 can be gripped (closed) and released (opened) by controlling the opening and closing of the hooks 604.

[0026] The figure shows a case where only two pairs of hooks 604 are provided. In this case, preferably, the two pairs of hooks 604 are respectively provided in the direction along the swing axis of the hooks 604 on the lifting frame 602 (i.e., Figure 4 The positions at both ends (perpendicular to the paper) such as Figure 3 As shown, the two pairs of hooks 604 can grab the hook lifting parts 801 at the four corners of the tray 8. On the one hand, this ensures the stability of the tray 8, and on the other hand, the distance between the two pairs of hooks 604 is far enough to facilitate the removal or placement of the anode by the electrode changing vehicle.

[0027] However, it should be noted that in other embodiments, if space permits, the hook 604 can be provided in three or more pairs.

[0028] More preferably, in each pair of hooks 604, each hook 604 is independently hinged to the lifting frame 602, specifically through a pin. Correspondingly, each hook 604 is equipped with a hook driver that drives the hook 604 to swing open and close. This transmission method is relatively simple and has higher reliability.

[0029] It should be noted that in other embodiments, it is not entirely ruled out that each pair of hooks 604 may be connected by a scissor linkage mechanism and driven by the same driver to swing and open / close the two hooks 604.

[0030] More preferably, the aforementioned claw actuator can be a telescopic actuator 603, i.e., an actuator with a telescopic output end, such as... Figure 4 and Figure 5 As shown, the two ends of the telescopic actuator 603 are hinged to the hook 604 and the lifting frame 602, respectively. By controlling the telescopic movement of the telescopic actuator 603, the hook 604 can be driven to swing, thereby achieving opening and closing. Specifically, as shown... Figure 4 As shown, an outwardly flared portion that is inclined away from the lifting frame 602 can be provided on the hook 604 to facilitate the normal connection of the telescopic driver 603.

[0031] In this preferred embodiment, the telescopic actuator 603 preferably employs an electro-hydraulic actuator. For ease of description, the electro-hydraulic actuator here can be defined as a telescopic electro-hydraulic actuator. The telescopic electro-hydraulic actuator can output large thrust (tension), has strong load-bearing capacity, and is convenient for electrical control. Of course, in other embodiments, the telescopic actuator 603 may also employ a hydraulic cylinder or an electric actuator.

[0032] Since the action of the hook 604 is a swinging motion, in fact, in other embodiments, the hook driver can also be a rotary driver (e.g., a motor), and the output shaft of the motor can be connected to the swing shaft of the hook 604 for transmission.

[0033] In addition, the lifting drive mechanism 601 can also adopt an electro-hydraulic actuator. For ease of description, the electro-hydraulic actuator here can be defined as a lifting electro-hydraulic actuator. Specifically, there are multiple sets of lifting electro-hydraulic actuators, and one end of the lifting electro-hydraulic actuator is connected to the lifting frame, while the other end is used for installation and connection with the pole changing crane (specifically the main frame 3).

[0034] Preferably, to ensure the lifting stability of the lifting frame and to avoid the pallet lifting mechanism 6 being too heavy, the lifting electro-hydraulic actuators can be arranged in 4, 5 or 6 sets.

[0035] In some implementations of a pole-switching system, separate pole-switching carts and trays 8 can be configured for removing the residual pole and replacing the new pole, respectively. For example... Figures 1-3 As shown, the pole-changing device includes a residual pole car beam 12 and a new pole car beam 15. The residual pole car beam 12 and the new pole car beam 15 are parallel to the longitudinal beam 302, and both ends of the two beams are supported by a cross beam 301 and can be translated along the cross beam 301. Specifically, a traveling wheel 13 and a guide wheel 14 are also arranged at both ends of the residual pole car beam 12 and the new pole car beam 15. The traveling wheel 13 can travel and move along the upper surface of the cross beam 301, and the guide wheel 14 at both ends can be internally supported on the opposite side surface of the two cross beams 301. Naturally, a traveling drive mechanism is also provided for the traveling wheel 13.

[0036] The residual electrode carriage 4, which can move along the main beam 12, is used to remove the residual electrode. Correspondingly, rollers and drive mechanisms are also provided between the residual electrode carriage 4 and the new electrode carriage main beam 15.

[0037] The new pole car beam 15 is equipped with a new pole car 5 that can move along it, which is a pole changing car for loading new poles. Correspondingly, rollers and drive mechanisms are also provided between the new pole car 5 and the new pole car beam 15.

[0038] In this preferred embodiment, by controlling the movement of the residual electrode carriage beam 12 and the new electrode carriage beam 15 along the crossbeam 301, the corresponding residual electrode carriage 4 or new electrode carriage 5 can be moved along the length direction of the electrolytic cell 11. By controlling the movement of the residual electrode carriage 4 and the new electrode carriage 5 along the corresponding beam, the residual electrode carriage 4 or the new electrode carriage 5 can be moved along the arrangement direction of the electrolytic cell 11.

[0039] In addition, two sets of pallet lifting mechanisms 6 are installed on the main frame 3. Correspondingly, the two sets of pallet lifting mechanisms 6 are used to lift different pallets 8. One pallet 8 is used to place the residual electrode, which can be defined as the residual electrode pallet 8, and the other pallet 8 is used to place the new electrode, which can be defined as the new electrode pallet 8. The new electrode pallet 8 and the residual electrode pallet 8 can be arranged in the pallet placement position 9 according to the arrangement direction of the electrolytic cell 11. When performing electrode replacement operation, the two pallets 8 are lifted by the corresponding pallet lifting mechanisms 6, and the residual electrode is placed on the residual electrode pallet 8 by adjusting the movement of the residual electrode carriage beam 12 and the residual electrode carriage 4, and the new electrode is removed from the pallet 8 by adjusting the movement of the new electrode carriage beam 15 and the new electrode carriage 5.

[0040] In this embodiment, the removal of the residual electrode and the replacement of the new electrode are performed by different electrode-changing vehicles. This allows for simultaneous removal of the residual electrode and replacement of the new electrode during the electrode-changing operation, provided the beams of the two vehicles do not interfere with each other, thereby improving electrode-changing efficiency. This is especially beneficial for applications such as... Figure 2 As shown, when the residual electrodes of two electrolytic cells 11 are replaced simultaneously, the electrode replacement efficiency can be significantly improved compared to setting up only one electrode replacement vehicle.

[0041] It should be noted that, in feasible implementations, there may be only one electrode-changing cart, tray 8, and tray lifting mechanism 6. In this case, tray 8 can hold both new and residual electrodes. After removing the residual electrode, the electrode-changing cart places it on tray 8 and removes the new electrode to complete the replacement.

[0042] The electrode switching system also includes an isolation structure mounted on the main frame 3. The isolation structure provides an isolation space to isolate the entire electrolytic cell 11 during electrode switching operations. The pallet lifting mechanism 6 is located within this isolation space. Specifically, the isolation structure includes a top isolation cover 10 and a movable isolation cover. As the names suggest, the top isolation cover 10 refers to the uppermost isolation cover, and the movable isolation cover refers to the movable isolation cover. More specifically, the movable isolation cover is located at the lower end of the top isolation cover 10 and can be moved up and down. This movement includes various methods such as lifting, rolling up and unfolding, and folding, to achieve both raising and lowering of the isolation cover.

[0043] After the movable isolation cover is lowered, it can enclose and form an isolation space for shielding the electrolytic cell 11. At its most basic, the isolation space should be sufficient to shield one electrolytic cell 11. However, in practice, to accommodate the replacement of residual electrodes in different electrolytic cells 11, such as... Figure 2As shown, the isolation space can meet the isolation space of covering two electrolytic cells 11. Of course, if the space of the workshop 1 is sufficient, the isolation space can be larger to meet the isolation space of covering three or even more electrolytic cells 11.

[0044] The electrode replacement system, by configuring an isolation structure, can enclose the electrolytic cell 11 in an isolation space when replacing the residual electrode. In this way, after the gas collection hood is opened, the harmful hot flue gas released by the electrolytic cell 11 can be collected by the isolation space and will not be randomly discharged into the outside atmosphere.

[0045] In order to treat harmful hot flue gas in a timely manner, a purification device 2 is also installed on the main frame 3. The purification device 2 is connected to the top isolation cover 10. Specifically, it can be a negative pressure dust collection device based on dry purification, which is consistent with the invention patent application with publication number CN110453249A. Its structure will not be described in detail here.

[0046] During the electrode switching operation, the harmful flue gas inside the isolation space can be collected and treated in a timely manner by the purification device 2.

[0047] During the entire electrode replacement process, the purification device 2 can purify the air in the isolation space, realizing a closed operation throughout the entire electrode replacement process. This avoids the unorganized emission of hot flue gas during the electrode replacement process, reduces harmful flue gas emissions by more than 95%, and solves the technical problem of hot flue gas release threatening personnel health and the environment.

[0048] like Figure 1 and Figure 2 As shown, the movable isolation enclosure includes four roller blind mechanisms 7. Each roller blind mechanism 7 includes a roller and a curtain. Rotating the roller can raise and lower the curtain; specifically, an electric roller blind can be used. The curtain should be made of high-temperature resistant materials such as fiberglass-based composite fabric or polyester fire-resistant fabric. The four roller blind mechanisms 7 are respectively connected to the four sides of the top isolation enclosure 10, and curtain connecting structures are provided at both ends of the curtain in the horizontal direction. These connecting structures allow the curtains of the four roller blind mechanisms 7 to be connected to the curtains of adjacent roller blind mechanisms 7 at both ends, thus forming a closed enclosure structure.

[0049] It should be noted that a clearance groove is provided on the curtain fabric away from the aluminum outlet end of the electrolytic cell 11 to avoid the exhaust pipe 1101 of the electrolytic cell.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An anode tray lifting mechanism for a pole-changing overhead crane, characterized in that, It includes a lifting frame and a lifting drive mechanism. The lifting drive mechanism is installed on the pole changing crane. Its lifting output end is connected to the lifting frame to drive the lifting frame to lift. The lifting frame is equipped with a gripping device for grabbing the tray. During pole changing, the tray lifting mechanism can grab the tray through the gripping device and drive the lifting frame through the lifting drive mechanism to lift the tray to a set height and move with the pole changing crane. The lifting frame is equipped with a channel for the pole changing car on the pole changing crane to enter to take away or put in the anode.

2. The anode tray lifting mechanism according to claim 1, characterized in that, The pallet gripping device includes at least two pairs of swingable hooks mounted on a lifting frame to grip and release the pallet by controlling the opening and closing of the hooks.

3. The anode tray lifting mechanism according to claim 2, characterized in that, Each hook in each pair is independently hinged to the lifting frame, and each hook is equipped with a hook driver that drives the hook to swing open and close.

4. The anode tray lifting mechanism according to claim 3, characterized in that, The hook actuator is a telescopic actuator, with its two ends hinged to the hook and the lifting frame, respectively.

5. The anode tray lifting mechanism according to claim 4, characterized in that, The telescopic actuator is a telescopic electro-hydraulic actuator.

6. The anode tray lifting mechanism according to any one of claims 1-5, characterized in that, The lifting drive mechanism includes multiple sets of lifting electro-hydraulic actuators. One end of the lifting electro-hydraulic actuator is connected to the lifting frame, and the other end is used for installation and connection with the pole-changing overhead crane.

7. The anode tray lifting mechanism according to claim 6, characterized in that, The lifting electro-hydraulic actuator has 4-6 sets.

8. The anode tray lifting mechanism according to any one of claims 2-5, characterized in that, The gripping device includes two pairs of openable and closable hooks, and the two pairs of hooks are respectively located at both ends of the lifting frame along the swing axis of the hooks.

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