Control box and control system for cover plate of aluminum electrolytic cell

Abstract

The application provides a control box and a control system of an aluminum electrolysis cell cover plate, and relates to the technical field of equipment control. The control box is provided with a control unit, a touch screen and a load driving circuit. The control unit and the touch screen are electrically connected to obtain input control instructions. The control unit is also electrically connected to the input end of the load driving circuit. The first output end of the load driving circuit is connected to multiple groups of overturning electromagnetic valves. Each group of the overturning electromagnetic valves is arranged in the air path control box. Each group of the overturning electromagnetic valves is drivingly connected to the two ends of the first driving member in each cover plate, so that the load driving circuit outputs overturning control levels to the corresponding overturning electromagnetic valves of the cover plates to be controlled according to control levels. As a result, the overturning electromagnetic valves drive the first driving member in the cover plates to be controlled to drive the overturning cover plates to perform overturning actions under the action of the overturning control levels. The user operation is facilitated, the labor intensity of workers is reduced, and the cover plates of the aluminum electrolysis cell are safely controlled.

Description

Technical Field

[0001] This invention relates to the field of equipment control technology, and more specifically, to a control box and control system for an aluminum electrolysis cell cover plate. Background Technology

[0002] The cover plates of the aluminum electrolytic cell cover the upper and lower openings on both sides of the cell. During the production process, when operations such as changing anodes, feeding port operations, and inspecting the inside of the cell are required, the cover plates on both sides need to be opened to provide working space for the overhead crane or workers.

[0003] In related technologies, the electrolyte temperature inside the electrolytic cell needs to be maintained above 900 degrees Celsius. The cover plate of the aluminum electrolytic cell serves as an insulation layer, so its temperature is usually quite high. When opening or closing the cover plate, gloved personnel need to remove the corresponding cover plate and move it to an adjacent cover plate.

[0004] However, in related technologies, manual operation of the cover plate is inconvenient for users, poses significant safety hazards, and increases the labor intensity of manual workers. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a control box and control system for an aluminum electrolytic cell cover plate, so as to solve the problems in the related art where manual operation of the cover plate is inconvenient for users, poses significant safety hazards, and increases the workload of manual labor.

[0006] To achieve the above objectives, the technical solutions adopted in the embodiments of the present invention are as follows:

[0007] In a first aspect, embodiments of the present invention provide a control box for an aluminum electrolytic cell cover plate. Each cover plate of the aluminum electrolytic cell includes: a flip cover plate and a first driving member; one end of the first driving member is fixedly disposed on an edge plate of each cover plate corresponding to an aluminum electrolytic cell, and the other end of the first driving member is fixedly connected to the outer surface of the flip cover plate.

[0008] The control box is equipped with: a control unit, a touch screen, and a load drive circuit; wherein, the control unit and the touch screen are electrically connected to obtain input control commands, and the control unit is also electrically connected to the input terminal of the load drive circuit to determine the cover plate to be controlled from the multiple cover plates of the aluminum electrolysis cell according to the control commands, and input the control level corresponding to the cover plate to be controlled to the load drive circuit;

[0009] The first output terminal of the load drive circuit is connected to multiple sets of flip solenoid valves. Each set of flip solenoid valves is installed in the air circuit control box. Each set of flip solenoid valves is driven to both ends of the first driving member in each cover plate, so that the load drive circuit outputs a flip control level to the flip solenoid valve corresponding to the cover plate to be controlled according to the control level. Thus, the flip solenoid valve drives the first driving member in the cover plate to be controlled to rotate the cover plate under the action of the flip control level.

[0010] Optionally, the plurality of cover plates includes a plurality of first cover plates and a second cover plate. The first cover plate further includes: a telescopic cover plate and a second driving member. One end of the second driving member is disposed on the outer surface of the flip cover plate in the first cover plate, and the other end of the second driving member is disposed on the surface of the telescopic cover plate facing the flip cover plate.

[0011] The second output terminal of the load drive circuit is connected to multiple sets of telescopic solenoid valves. Each set of telescopic solenoid valves is installed in the gas circuit control box. Each set of telescopic solenoid valves is driven by the second driving component in each first cover plate. This allows the load drive circuit to output a telescopic control level to the telescopic solenoid valve installed on the aluminum electrolysis cell corresponding to the cover plate to be controlled, based on the control level. As a result, the telescopic solenoid valve drives the second driving component in the cover plate to be controlled, thereby causing the telescopic cover plate to perform telescopic movements.

[0012] Optionally, the third output terminal of the load drive circuit is connected to multiple sets of safety solenoid valves, each set of safety solenoid valves being located inside the pneumatic control box; each set of safety solenoid valves is connected to multiple sets of the tilting solenoid valves and multiple sets of telescopic solenoid valves respectively.

[0013] Optionally, the control box further includes: a limit switch monitoring circuit, wherein multiple input terminals of the limit switch monitoring circuit are respectively connected to multiple limit switches; the multiple limit switches include: multiple sets of first limit switches and multiple sets of second limit switches; one limit switch in each set of first limit switches is disposed on the flip cover, and another limit switch in each set of first limit switches is disposed on the first drive member; one limit switch in each set of second limit switches is disposed on the flip cover, and another limit switch in each set of second limit switches is disposed on the flip cover of an adjacent cover;

[0014] The output of the limit switch monitoring circuit is connected to the control unit to output the open / closed state of the limit switch corresponding to the cover to be controlled to the control unit, so that the control unit can detect whether the cover to be controlled has a switch failure based on the open / closed state.

[0015] Optionally, the fourth output terminal of the load drive circuit is connected to an alarm. The control unit is used to input a fault level to the load drive circuit when a switch failure is detected in the cover plate to be controlled, so that the load drive circuit controls the alarm to output an alarm signal based on the fault level.

[0016] Optionally, the control box is further provided with a communication circuit, wherein the control unit is used to output a fault signal to the communication circuit when a switch failure is detected in the cover plate to be controlled, so that the communication circuit outputs the fault signal to the connected host computer;

[0017] The control unit is also used to output the status information of the cover plate to the host computer through the communication circuit; the communication circuit is also used to send the control information issued by the host computer to the control unit, and the control information is used to change the status of the cover plate to be controlled.

[0018] Optionally, each of the multiple sets of tilting solenoid valves, the multiple sets of telescopic solenoid valves, and the multiple sets of safety solenoid valves is electrically connected to a power source.

[0019] The control box is also equipped with a power electrical detection module, which is connected in parallel to the power supply to determine whether the power supply to each solenoid valve is normal.

[0020] The output of the power detection module is also connected to the control unit, so that when the control unit determines that the power supply to each solenoid valve is abnormal, it inputs the fault level to the load drive circuit, so that the load drive circuit controls the alarm to output an alarm signal based on the fault level.

[0021] Optionally, the control box is further provided with a power module, the input terminal of which is electrically connected to a logic power supply; the first output terminal of the power module is electrically connected to the limit switch monitoring circuit, the touch screen and the load drive circuit to provide power.

[0022] The second output terminal of the power module is also electrically connected to the control unit to supply power to the control unit.

[0023] Optionally, the control box is also provided with input / output interfaces;

[0024] The first output terminal of the load drive circuit is connected to the multiple sets of tilting solenoid valves through the input / output interface; the second output terminal of the load drive circuit is connected to the multiple sets of telescopic solenoid valves through the input / output interface; the third output terminal of the load drive circuit is connected to the multiple sets of safety solenoid valves through the input / output interface; and the fourth output terminal of the load drive circuit is connected to the alarm through the input / output interface.

[0025] The limit switch monitoring circuit is connected to the multiple sets of safety solenoid valves through the input / output interface; the control unit is connected to the touch screen through the input / output interface.

[0026] In a second aspect, the present invention also provides a control system for an aluminum electrolytic cell cover plate. Each aluminum electrolytic cell is provided with multiple cover plates. Each cover plate of the aluminum electrolytic cell has a corresponding control box and a gas path control box. The control box is the control box of the aluminum electrolytic cell cover plate described in the first aspect.

[0027] The control unit in the control box is connected to each solenoid valve in the corresponding pneumatic control box through the load drive circuit;

[0028] The control boxes are connected in parallel via the communication circuit, and the communication circuit in the last control box is connected to the host computer via a converter module.

[0029] The beneficial effects of this invention are as follows: This application provides a control box for an aluminum electrolytic cell cover plate. The control box includes a control unit, a touch screen, and a load drive circuit. The control unit and the touch screen are electrically connected to obtain input control commands. The control unit is also electrically connected to the input terminal of the load drive circuit to determine the cover plate to be controlled from multiple cover plates of the aluminum electrolytic cell according to the control commands, and input the control level corresponding to the cover plate to be controlled to the load drive circuit. The first output terminal of the load drive circuit is connected to multiple sets of flipping solenoid valves. Each set of flipping solenoid valves is installed in the gas circuit control box. Each set of flipping solenoid valves is driven connected to both ends of the first driving member in each cover plate, so that the load drive circuit outputs a flipping control level to the flipping solenoid valve corresponding to the cover plate to be controlled according to the control level. Thus, under the action of the flipping control level, the flipping solenoid valve drives the first driving member in the cover plate to be controlled to rotate the cover plate. By simply inputting control commands through the touchscreen, the first driving component of the cover to be controlled can be driven based on the control unit and load drive circuit. The first driving component then drives the cover to be controlled to flip, eliminating the need for manual operation of the cover. This makes it easier for users to operate, reduces the labor intensity of manual labor, and enables safe control of the cover of the aluminum electrolysis cell. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1This is a schematic diagram of the connection structure of the control box for the aluminum electrolysis cell cover plate provided in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the control box for the aluminum electrolysis cell cover plate provided in an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of the load drive circuit provided in an embodiment of the present invention;

[0034] Figure 4 A schematic diagram of the cover plate arrangement structure is provided for an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the connection structure of the control box for the aluminum electrolysis cell cover plate provided in an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the structure of the electrolytic cell and cover plate provided in an embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram of the limit switch monitoring circuit provided in an embodiment of the present invention;

[0038] Figure 8 This is a schematic diagram of the communication circuit provided in an embodiment of the present invention;

[0039] Figure 9 This is a schematic diagram of the power electrical detection module provided in an embodiment of the present invention;

[0040] Figure 10 This is a schematic diagram of the power module provided in an embodiment of the present invention;

[0041] Figure 11 This is a schematic diagram of the solenoid valve connection provided in an embodiment of the present invention;

[0042] Figure 12 This is a schematic diagram of the control system for the aluminum electrolytic cell cover plate provided in an embodiment of the present invention. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0044] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0045] In the description of this application, it should be noted that if the terms "upper", "lower", etc. appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] Furthermore, the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Additionally, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0048] In this embodiment, an aluminum electrolysis cell can be provided with multiple cover plates. Each cover plate of the aluminum electrolysis cell includes a flip cover plate and a first driving member. One end of the first driving member is fixedly disposed on an edge plate of each cover plate corresponding to an aluminum electrolysis cell, and the other end of the first driving member is fixedly connected to the outer surface of the flip cover plate. The first driving member is a telescopic control member. By controlling the extension and retraction of the first driving member, the closing or closing of the flip cover plate can be controlled. For example, the first driving member can be a cylinder. When the cylinder extends, the flip cover plate closes; when the cylinder retracts, the flip cover plate opens.

[0049] Figure 1 This is a schematic diagram of the connection structure of the control box for the aluminum electrolysis cell cover plate provided in an embodiment of the present invention, as shown below. Figure 1As shown, the control box 10 is equipped with a control unit 101, a touch screen 102, and a load drive circuit 103. The control unit 101 and the touch screen 102 are electrically connected to receive input control commands. The control unit 101 is also electrically connected to the input terminal of the load drive circuit 103 to determine the cover plate to be controlled from among the multiple cover plates of the aluminum electrolysis cell according to the control commands, and input the control level corresponding to the cover plate to be controlled to the load drive circuit 103.

[0050] The load drive circuit 103 may include multiple relays, each relay corresponding to a control solenoid valve, and the multiple control solenoid valves may include a toggle solenoid valve 201. Optionally, the control solenoid valves may also include a retraction solenoid valve and a safety solenoid valve. Furthermore, the load drive circuit 103 may also be connected to an alarm, but this embodiment does not impose specific limitations in this regard.

[0051] In some implementations, when a user needs to control the cover plate of the aluminum electrolysis cell, they can input control commands on the touch screen 102. The control unit 101 can obtain the input control commands through the touch screen 102, determine the cover plate to be controlled from among the multiple cover plates of the aluminum electrolysis cell according to the control commands, determine the target relay corresponding to the cover plate to be controlled, and output a control level to the target relay in the load drive circuit 103. The touch screen 102 can also display the status information of each cover plate, which indicates whether the cover plate is in a closed state or an open state.

[0052] In addition, the first output terminal of the load drive circuit 103 is connected to multiple sets of flip solenoid valves 201. Each set of flip solenoid valves 201 is installed in the pneumatic control box. Each set of flip solenoid valves 201 is driven to both ends of the first driving member in each cover plate. This allows the load drive circuit 103 to output a flip control level to the flip solenoid valve 201 corresponding to the cover plate to be controlled according to the control level. As a result, the flip solenoid valve 201 drives the first driving member in the cover plate to be controlled to flip the cover plate.

[0053] In this circuit, multiple relays in the load drive circuit 103 are connected to corresponding tilting solenoid valves 201 in the pneumatic control box via wires. Additionally, when the first driving element is a cylinder, each set of tilting solenoid valves 201 is connected to both ends of the first driving element in each cover plate via air guide pipes.

[0054] In one possible implementation, the target relay in the load drive circuit 103 can acquire a control level. Based on this control level, the target relay outputs a flip control level to the flip solenoid valve 201 corresponding to the cover to be controlled. The flip solenoid valve 201 can then drive the cylinder in the cover to flip, causing the cover to flip. This flipping action is used to open or close the cover.

[0055] In this embodiment, the control unit 101 can be a control chip, which can be an MCU (Microcontroller Unit). The control unit 101 may include multiple digital input / output ports. For example, the number of digital input / output ports can be 112.

[0056] Figure 2 This is a schematic diagram of the control box for the aluminum electrolytic cell cover plate provided in an embodiment of the present invention, as shown below. Figure 2 As shown, Figure 2 (a) in the diagram represents the box when it is closed. Figure 2 (b) in the diagram represents a schematic of the box when it is open. For example... Figure 2 As shown, the control box includes a housing 21, a control circuit board 22, and a touch screen 102. The touch screen 102 is mounted on the housing 21, and the control circuit board 22 is housed within the housing 21. A load drive circuit 103 may be mounted on the control circuit board.

[0057] In some implementations, the user can operate the touch screen 102. The control circuit board 22 can obtain input control commands through the touch screen 102, determine the cover to be controlled based on the control commands, and input a control level to the target relay in the load drive circuit 103 so that the target relay outputs a flip control level to the flip solenoid valve 201 corresponding to the cover to be controlled, thereby driving the first drive member of the cover to be controlled, thereby causing the cover to be controlled to flip.

[0058] In addition, an emergency button 23 can be provided on the aforementioned housing 21. The user can operate the emergency button 23 to cut off the power supply to the flip solenoid valve 201, thus de-energizing the flip solenoid valve 201 and keeping the corresponding cover plate in its current state.

[0059] Figure 3 This is a schematic diagram of the load drive circuit 103 provided in an embodiment of the present invention, as shown below. Figure 3As shown in (a) and (b), the load drive circuit 103 may include: four identical optocoupler isolation modules, the inputs of which are respectively connected to the PD12, PD13, PD14, and PD15 ports of the control unit 101; the inputs of the four optocoupler isolation modules are also respectively connected to one end of resistors R1, R10, R17, and R23; the other ends of resistors R1, R10, R17, and R23 are also connected to a 3.3V power supply output. The outputs of the four optocoupler isolation modules include: AO1, AO2, AO3, and AO4, which are also connected to the positive terminal of the 12V power supply; the outputs of the four optocoupler isolation modules are also respectively connected to one end of resistors R7, R14, R20, and R26, the other ends of which are also connected to the GND (negative terminal) of the 12V power supply. The values ​​of resistors R7, R14, R20, and R26 can all be 10KΩ (kiloohms).

[0060] The input terminal of the load drive circuit 103 can be connected to the PD12 port of the control unit 101. If the PD12 port is high, the diode at the input terminal of the optocoupler has no current and does not light up, the output terminal of the optocoupler is not conducting, that is, the voltage at the AO1 terminal is 0V, the transistor D8 connected through resistor R29 is not conducting, one end of the transistor D8 is also connected to the negative terminal of 12V, the indicator light D4 is off, the coil of relay K1 is not energized, the load of relay K1 is disconnected, and the power supply to the load is disconnected. If the PD12 port is low (0V), the diode at the input terminal of the optocoupler lights up, the output terminal of the optocoupler conducts, that is, the voltage at the AO1 terminal is 12V, the transistor D8 conducts, the indicator light D4 lights up, the coil of relay K1 is energized, the load of relay K1 is closed, and the AC 220V power supply powers the solenoid valve corresponding to relay K1. In addition, the indicator light D4 is also connected to one end of diode D1 and resistor R4, and the other end of diode D1 and resistor R4 is also connected to the 12V power supply.

[0061] In summary, this application provides a control box for an aluminum electrolytic cell cover plate. The control box includes a control unit 101, a touch screen 102, and a load drive circuit 103. The control unit 101 and the touch screen 102 are electrically connected to obtain input control commands. The control unit 101 is also electrically connected to the input terminal of the load drive circuit 103 to determine the cover plate to be controlled from multiple cover plates of the aluminum electrolytic cell according to the control commands, and input the control level corresponding to the cover plate to be controlled to the load drive circuit 103. The first output terminal of the load drive circuit 103 is connected to multiple sets of flip solenoid valves 201. Each set of flip solenoid valves 201 is installed in the gas circuit control box. Each set of flip solenoid valves 201 is driven connected to both ends of the first driving member in each cover plate, so that the load drive circuit 103 outputs a flip control level to the flip solenoid valve 201 corresponding to the cover plate to be controlled according to the control level. Thus, under the action of the flip control level, the flip solenoid valve 201 drives the first driving member in the cover plate to be controlled to rotate the cover plate. By simply inputting control commands through the touch screen 102, the first driving component of the cover plate to be controlled can be driven by the control unit 101 and the load driving circuit 103. The first driving component drives the cover plate to be controlled to flip, eliminating the need for manual operation of the cover plate. This makes it easier for users to operate, reduces the labor intensity of manual labor, and achieves safe control of the cover plate of the aluminum electrolysis cell.

[0062] Optional, Figure 4 A schematic diagram of the cover plate arrangement structure is provided for an embodiment of the present invention, such as... Figure 4 As shown, there are multiple first cover plates 401 and a second cover plate 402 among the multiple cover plates. The first cover plate 401 further includes a telescopic cover plate 4011 and a second driving member 403. One end of the second driving member 403 is disposed on the outer surface of the flip cover plate in the first cover plate 401, and the other end of the second driving member 403 is disposed on the surface of the telescopic cover plate 4011 facing the flip cover plate.

[0063] In one aluminum electrolysis cell, among multiple cover plates, the first cover plate can be the second cover plate 402, and the other cover plates can be the first cover plate 401. The second driving component 403 can be a cylinder. For example... Figure 4 As shown, the cover plate of the aluminum electrolysis cell includes: one second cover plate 402 and two first cover plates 401. The first cover plate 401 includes: a flip cover plate, a first driving member 404, a telescopic cover plate 4011, and a second driving member 403. The second cover plate 402 includes a flip cover plate and a first driving member 404. The first driving member 404 can be vertically arranged, and the second driving member 403 can be horizontally arranged. Each first cover plate 401 can have one first driving member 404 and one second driving member 403; each second cover plate 402 can have one first driving member 404.

[0064] In addition, the second output terminal of the load drive circuit 103 is connected to multiple sets of telescopic solenoid valves 202. Each set of telescopic solenoid valves 202 is installed in the gas circuit control box. Each set of telescopic solenoid valves 202 is driven and connected to the second drive unit 403 in each first cover plate 401. This allows the load drive circuit 103 to output a telescopic control level to the telescopic solenoid valve 202 installed on the aluminum electrolysis cell corresponding to the cover plate to be controlled, so that the telescopic solenoid valve 202 drives the second drive unit 403 in the cover plate to be controlled to move the telescopic cover plate to telescopically extend or retract under the action of the telescopic control level.

[0065] In one possible implementation, the user can input control commands through the touch screen 102. The control unit 101 can obtain the control commands to determine the cover to be controlled, and control the relay in the load drive circuit 103 to output the telescopic control level to the telescopic solenoid valve 202 corresponding to the cover to be controlled, so as to drive the second drive member 403 of the cover to be controlled through the telescopic solenoid valve 202, thereby driving the corresponding telescopic cover to extend and retract.

[0066] It should be noted that in the load drive circuit 103, there is a relay corresponding to each flip solenoid valve 201 and a relay corresponding to each telescopic solenoid valve 202. That is, the relays and the controlled solenoid valves are in one-to-one correspondence. The control unit 101 can control the corresponding solenoid valve by controlling the corresponding relay.

[0067] Optional, Figure 5 This is a schematic diagram of the connection structure of the control box for the aluminum electrolysis cell cover plate provided in an embodiment of the present invention, as shown below. Figure 5 As shown. The third output terminal of the load drive circuit 103 is connected to multiple sets of safety solenoid valves 203, each set of safety solenoid valves 203 is installed in the pneumatic control box; each set of safety solenoid valves 203 is connected to a set of tilting solenoid valves 201 and a set of telescopic solenoid valves 202 respectively.

[0068] Among them, the safety solenoid valve 203 is connected to the pneumatic circuits of the flip solenoid valve 201 and the telescopic solenoid valve 202 respectively.

[0069] Figure 6 This is a schematic diagram of the structure of the electrolytic cell and cover plate provided in an embodiment of the present invention, as shown below. Figure 6 As shown, side A includes cover plates A(1), A(2), A(3), A(4), A(5), A(6), and A(7); side B includes cover plates B(1), B(2), B(3), B(4), B(5), B(6), and B(7).

[0070] In one possible implementation, the aluminum electrolysis cell may have opposing A and B sides. Multiple cover plates may be provided on side A and side B, and the cover plates on sides A and B are independently controlled. The cover plate on side A may have corresponding multiple first tilting solenoid valves 201 and first telescopic solenoid valves 202. Each of these multiple first tilting solenoid valves 201 and first telescopic solenoid valves 202 is connected to a safety solenoid valve 203. By controlling the safety solenoid valve 203, each of the first tilting solenoid valves 201 and first telescopic solenoid valves 202 can be controlled simultaneously.

[0071] The cover plate on side B can have multiple corresponding second tilting solenoid valves 201 and second telescopic solenoid valves 202. Each of these valves is connected to another safety solenoid valve 203. By controlling this safety solenoid valve 203, each tilting solenoid valve 201 and each telescopic solenoid valve 202 can be controlled simultaneously. For example, one safety solenoid valve 203 corresponds to 13 control solenoid valves, including tilting solenoid valves 201 and telescopic solenoid valves 202; another safety solenoid valve 203 also corresponds to 13 control solenoid valves, including tilting solenoid valves 201 and telescopic solenoid valves 202. Therefore, the number of relays in the load drive circuit 103 can be 28.

[0072] In practical applications, the emergency button 23 on the control safety box can be operated, which will de-energize the safety solenoid valve 203 corresponding to the emergency button 23. The flip solenoid valve 201 and the telescopic solenoid valve 202 connected to the safety solenoid valve 203 will also lose power and stop working. The corresponding cover will then be affected only by gravity, and the cover can be manually pushed, pulled and flipped.

[0073] Optional, such as Figure 5 As shown, the control box also includes: a limit switch monitoring circuit 104, the multiple input terminals of which are respectively connected to multiple limit switches; as shown Figure 4 As shown, the multiple limit switches include: multiple sets of first limit switches 405 and multiple sets of second limit switches 406; one limit switch in each set of first limit switches 405 is disposed on the flip cover, and the other limit switch in each set of first limit switches 405 is disposed on the first drive member 404; one limit switch in each set of second limit switches 406 is disposed on the flip cover, and the other limit switch in each set of second limit switches 406 is disposed on the flip cover of the adjacent cover.

[0074] Among them, the limit switch can be a contact limit switch, and multiple sets of first limit switches 405 are switches corresponding to the first driving element 404. Multiple sets of first limit switches 405 are provided on both the first cover plate 401 and the second cover plate 402; multiple sets of second limit switches 406 are switches corresponding to the second driving element 403.

[0075] It should be noted that, in each group of first limit switches 405, the limit switch mounted on the flip cover is a normally closed limit switch; the limit switch mounted on the drive component in each group of first limit switches 405 is a normally open limit switch. In each group of second limit switches 406, the limit switch mounted on the flip cover is a normally open limit switch; the limit switch mounted on the flip cover of the adjacent cover in each group of second limit switches 406 is a normally closed limit switch.

[0076] In addition, the output of the limit switch monitoring circuit 104 is connected to the control unit 101 to output the opening and closing status of the limit switch corresponding to the cover to be controlled to the control unit 101, so that the control unit 101 can detect whether the cover to be controlled has a switch failure based on the opening and closing status.

[0077] In one possible implementation, the control unit 101 can acquire the opening and closing status of the limit switch corresponding to the cover plate to be controlled in real time. After the control unit 101 drives the cover plate to move through the load drive circuit 103, solenoid valve and drive component, the control unit 101 can detect whether the cover plate to be controlled has a switch failure according to the opening and closing status of the limit switch.

[0078] Optionally, the aluminum electrolysis cell can be equipped with 13 normally open limit switches and 13 normally closed limit switches on the multiple cover plates corresponding to side A; side B is similar to side A, and will not be described in detail here. Therefore, the control unit 101 needs 52 digital input ports to monitor the status of these limit switches, and the monitoring method for each limit switch is exactly the same.

[0079] Figure 7 This is a schematic diagram of the limit switch monitoring circuit provided in an embodiment of the present invention, as shown below. Figure 7As shown in (a) and (b), the limit switch monitoring circuit 104 consists of four identical optocoupler isolation modules. Resistors R2, R11, R18, and R24 can also be connected to the optocoupler input terminals. The cathodes of the diodes at the optocoupler input terminals can be connected to the input terminals of limit switches 1, 2, 3, and 4, respectively. The optocoupler output terminals can be connected to the PA1, PA2, PA3, and PA4 ports of the control unit 101, respectively, and can be connected to a 3.3V voltage. Resistors R8, R15, R21, and R27 can be connected to the other end of each resistor, and the other end of each resistor can be connected to DGND (digital ground). The values ​​of resistors R8, R15, R21, and R27 can all be 3.3KΩ.

[0080] The cathode of the diode at the input end of the optocoupler is connected to the input end of the limit switch 1, and the output end of the optocoupler is connected to the PA1 port of the control unit 101. If a high level is detected at the PA1 port, it means that there is current in the diode at the input end of the optocoupler, that is, the limit switch (limit switch 1) of the cover plate A(1) is closed when it is flipped and extended to the limit position, that is, the flipping cylinder has not pressed the limit switch and the flipping cylinder has not extended to the limit position; if a low level is detected at the PA1 port, it means that there is no current in the diode at the input end of the optocoupler, that is, the limit switch (limit switch 1) of the cover plate A(1) is open when it is flipped and extended to the limit position, that is, the flipping cylinder has pressed the limit switch 1 and the flipping cylinder has extended to the limit position.

[0081] If a high level is detected at port PA2, it indicates that there is current in the diode at the input end of the optocoupler, meaning that the normally open limit switch (limit switch 2) is closed when the cover plate A(1) is flipped and retracted, and the flipping cylinder has been pressed to the limit switch, thus the flipping cylinder has been retracted to its limit position. If a low level is detected at port PA2, it indicates that there is no current in the diode at the input end of the optocoupler, meaning that the normally open limit switch (limit switch 2) is open when the cover plate A(1) is flipped and retracted, and the flipping cylinder has not been pressed to the limit switch, thus the flipping cylinder has not been retracted to its limit position. The control unit 101 can monitor the state of each normally closed and normally open limit switch in real time by monitoring the voltage of its digital input port, and thus monitor the extension and retraction state of each cylinder in real time. The implementation process of cover plate A(2) is similar to that of cover plate A(1), and will not be described again here.

[0082] Furthermore, the monitoring methods for other normally open limit switches are the same as those for limit switch 1, and the monitoring methods for other normally closed limit switches are the same as those for limit switch 2. For example, if each aluminum electrolysis cell has 26 normally open limit switches and 26 normally closed limit switches, totaling 52 limit switches, then 52 optocoupler modules are required. In some embodiments, every four optocoupler modules can be packaged into one unit.

[0083] Optional, such as Figure 5As shown, the control unit 101 is also connected to the touch screen 102 via a conversion module 109. The conversion module 109 can be a TTL-RS232 conversion module. The control unit 101 controls the display on the touch screen 102 or obtains control commands through the conversion module 109.

[0084] Optional, such as Figure 5 As shown, the fourth output terminal of the load drive circuit 103 is connected to the alarm 105. The control unit 101 is used to input a fault level to the load drive circuit 103 when a switch failure is detected in the cover to be controlled, so that the load drive circuit 103 controls the alarm 105 to output an alarm signal based on the fault level.

[0085] The load drive circuit 103 controls the alarm 105 to output an alarm signal based on a fault level, similar to how the solenoid valve controls the telescopic solenoid valve 202 based on a telescopic control level and the flip solenoid valve 201 based on a flip level; these processes will not be elaborated upon here. The optocoupler input terminal of the alarm 105 in the load drive circuit 103 can be connected to the PG12 port of the control unit 101, and the number of optocoupler isolation modules for the alarm 105 can be one.

[0086] In some implementations, after receiving a control command, the control unit 101 can control the alarm 105 to sound an alarm via the load drive circuit 103. Then, based on the control command, the load drive circuit 103 controls the corresponding control solenoid valve to drive the corresponding drive component. When the control unit 101 detects a switch malfunction in the cover to be controlled based on its open / closed state, it can also control the alarm 105 to sound an alarm via the load drive circuit 103.

[0087] Optional, such as Figure 5 As shown, the control box is also equipped with a communication circuit 106. The control unit 101 is used to output a fault signal to the communication circuit 106 when a switch failure is detected in the cover to be controlled, so that the communication circuit 106 outputs a fault signal to the connected host computer.

[0088] In one possible implementation, when the control unit 101 detects a switch failure in the cover to be controlled based on the open / closed state, it can output a fault signal to the host computer via the communication circuit 106. Correspondingly, the host computer can receive the fault signal and generate corresponding prompt information to notify the relevant personnel to handle the situation.

[0089] In addition, the control unit 101 is also used to output the status information of the cover plate to the host computer through the communication circuit 106; the communication circuit 106 is also used to send the control information sent by the host computer to the control unit 101, and the control information is used to change the status of the cover plate to be controlled.

[0090] In this embodiment, the control unit 101 can output the status information of the cover plate to the host computer via the communication circuit 106. The host computer can receive and display the status information of the cover plate. The user can also operate the host computer, which can respond to the user's operation, determine control information, and send the control information to the control unit 101 via the communication circuit 106. The control unit 101 can receive the control information and change the status of the cover plate to be controlled according to the control information.

[0091] Figure 8 This is a schematic diagram of the communication circuit 106 provided in an embodiment of the present invention, as shown below. Figure 8 As shown, the communication circuit 106 may include a communication bus controller (MCP2515), a communication transceiver (tja1040), and an optocoupler isolation module (6N137).

[0092] Among them, such as Figure 8 As shown, the communication bus controller can include 18 ports, with port 18 connected to a 3.3V power supply and port 17 connected to resistor R179. Port 2 of the communication bus controller can connect to an optocoupler isolation module. This module can also connect to resistor R180, the other end of which can be connected to the 3.3V power supply. The optocoupler isolation module can also connect to resistors R182 and R184, and can connect to 5V CAN (communication power supply positive) and GND_CAN (communication power supply negative). The optocoupler isolation module is also connected to the 5V power supply, DGND, and resistors R190, R195, and R192. The other end of resistor R192 is connected to the 5V CAN. Both the optocoupler isolation modules are also connected to a communication transceiver. The transceiver is also connected to fuses F1 and F2, diode D21, and diode D22 and resistor R191 connected to D21. Plug J1 is also connected to diodes D22 and R191, F1 is connected to R191, and F2 is connected to J1.

[0093] In this embodiment, the communication circuit 106 and the host computer's CAN (Controller Area Network) use shielded twisted-pair cable, with two wires designated CAN_H and CAN_L. Figure 8 As shown, the CAN communication line of the external control circuit board is introduced into the high-speed communication transceiver through fuses F1 and F2. Then, the serial port of the transceiver is led to the optocoupler isolation module to achieve the isolation of the external CAN communication signal from the internal signal of the control circuit board. Finally, it is connected to the control unit 101 through the communication bus controller.

[0094] The data transmission and reception process is as follows: The control unit 101 controls the communication bus controller to send data. The sent data is first transmitted through an optocoupler isolation module before reaching the communication transceiver, and then sent to the external CAN bus. When data arrives from the external CAN bus, it is first transmitted to the communication transceiver, then transmitted through the optocoupler isolation module to the communication bus controller, and finally read by the control unit 101.

[0095] Optionally, each of the multiple sets of tilting solenoid valves 201, multiple sets of telescopic solenoid valves 202, and multiple sets of safety solenoid valves 203 is electrically connected to a power source.

[0096] like Figure 5 As shown, the control box is also equipped with a power electrical detection module 107, which is connected in parallel to the power supply to determine whether the power supply to each solenoid valve is normal.

[0097] The output of the power detection module 107 is also connected to the control unit 101, so that when the control unit 101 determines that the power supply of each solenoid valve is abnormal, it inputs a fault level to the load drive circuit 103, so that the load drive circuit 103 controls the alarm to output an alarm signal based on the fault level.

[0098] Figure 9 This is a schematic diagram of the power electrical detection module provided in an embodiment of the present invention, as shown below. Figure 9 As shown, the optocoupler isolation module is connected to resistor R188 and diode D23, as well as resistor R194 and capacitor C19. The other ends of resistor R194 and capacitor C19 are connected to DGND. The other end of resistor R188 is connected to 220V_L (live wire), and the other end of diode D23 is connected to 220V_N (neutral wire). The optocoupler isolation module is also connected to a 3.3V power supply.

[0099] In this embodiment, because the solenoid valve is powered by 220V AC (Alternating Current), which is not the same as the 220V logic power, the power supply needs to be monitored, and an alarm should be triggered promptly if an abnormality is detected. Figure 9 As shown, the AC220V power supply is connected to the input terminal of the optocoupler isolation module. The third port of the optocoupler isolation module is connected to the PG11 port of the control unit 101. If the AC220V power supply is normal, the diode in the optocoupler isolation module will light up, the output terminal of the optocoupler isolation module will be connected, and the PG11 port will detect a 3.3V high level. If the AC220V power supply is de-energized, the diode in the optocoupler isolation module will not light up, the output terminal of the optocoupler isolation module will be completely disconnected, and the PG11 port will detect a 0V low level. The control unit 101 can determine whether the AC220V power supply is normal by reading the level of the PG11 port.

[0100] Optional, such as Figure 5 As shown, the control box is also equipped with a power module 108. The input terminal of the power module 108 is electrically connected to the logic power supply. The first output terminal of the power module 108 is electrically connected to the limit switch monitoring circuit 104, the touch screen 102 and the load drive circuit 103 to provide corresponding power supply signals. The second output terminal of the power module 108 is also electrically connected to the control unit 101 to supply power to the control unit 101.

[0101] The logic power supply can be AC220V. Additionally, this embodiment also includes a power supply, which can be AC220V. The power supply powers each solenoid valve, and the logic power supply also powers the alarm 105.

[0102] It should be noted that the first output terminal of the power module 108 can output DC (Direct Current) 12V to the limit switch monitoring circuit 104, the touch screen 102 and the load drive circuit 103, and the second output terminal of the power module 108 can output DC 3.3V and DC 5V to the control unit 101.

[0103] Figure 10 This is a schematic diagram of the structure of the power module 108 provided in an embodiment of the present invention, as shown below. Figure 10 As shown, the power module 108 includes: a transformer module (SPX1117) and a DC-DC converter module connected to the transformer module. It includes: capacitors C5, C7, C6, C4, and C7; resistor R13; and capacitors C3, C2, and C1, etc. The connection relationships between these components can be found in [reference needed]. Figure 10 The power module 108 also includes a switching power supply, providing 5V and 12V DC power.

[0104] In some implementations, 5VIN (pre-regulated voltage input) and 5VGNDIN (pre-regulated voltage ground) are 5V DC power supplied by the switching power supply. After being isolated and regulated by the DC-DC converter module, they are used by the communication circuit 106 for communication with the internal control circuit board. The 5VDC is converted to 3.3VDC by the transformer module and supplied to the control unit 101. The 5VDC is then isolated and regulated a second time by the DC-DC converter module before being used by the communication circuit 106 for communication with the external control circuit board. The 12V DC power requires no processing and can be directly introduced into the control circuit board for use.

[0105] Optional, such as Figure 2As shown, the control box is also equipped with an input / output interface 24; the first output terminal of the load drive circuit 103 is connected to multiple sets of tilting solenoid valves 201 through the input / output interface 24; the second output terminal of the load drive circuit 103 is connected to multiple sets of telescopic solenoid valves 202 through the input / output interface 24; the third output terminal of the load drive circuit 103 is connected to multiple sets of safety solenoid valves 203 through the input / output interface 24; the fourth output terminal of the load drive circuit 103 is connected to an alarm 105 through the input / output interface 24; the limit switch monitoring circuit 104 is connected to multiple sets of safety solenoid valves 203 through the input / output interface 24; and the control unit 101 is connected to the touch screen 102 through the conversion module 109 and the input / output interface 24.

[0106] The input / output interface 24 can also be referred to as an interface terminal.

[0107] It should be noted that the communication circuit 106 is also connected to the host computer through the input / output interface 24, and the power detection module 107 is connected in parallel to the power supply through the input / output interface 24.

[0108] It should be noted that the control circuit board may be equipped with the aforementioned control unit 101, load drive circuit 103, limit switch monitoring circuit 104, communication circuit 106, power detection module 107, power supply module 108, conversion module 109, and input / output interface 24.

[0109] The human-machine interface control box has two control modes: single cover mode and anode carbon block replacement mode. The touchscreen can be operated directly from the control box, or commands can be sent to the control box from a host computer.

[0110] Figure 11 This is a schematic diagram of the solenoid valve connection provided in an embodiment of the present invention, as shown below. Figure 11 As shown, it includes: two two-position three-way safety solenoid valves that are always energized, and two two-position five-way solenoid valves that are energized or de-energized according to control requirements. Among them, one safety solenoid valve 203 is connected to the flip solenoid valve 201 and telescopic solenoid valve 202 of each cover plate in the A-side cover plate; the A-side cover plate may include cover plate A(1) to cover plate A(7); cover plate A(1) can correspond to flip solenoid valve 201, and cover plates A(2) to A(7) can correspond to flip solenoid valve 201 and telescopic solenoid valve 202. Each flip solenoid valve 201 is connected to the first driving member 404, and each telescopic solenoid valve 202 is connected to the second driving member 403. The relevant description of the B-side cover plate is similar to that of the A-side cover plate, and will not be repeated here.

[0111] In this embodiment, the small end of the aluminum electrolysis cell has a pneumatic triplet and interface, using an air source 1101 from a dedicated air compressor station, with a pressure range typically between 0.5-0.7 MPa (megapascals). An air source is drawn from the triplet's output end. For side A, after passing through a two-position three-way safety solenoid valve, air is supplied to the two-position five-way solenoid valves corresponding to the cylinders assembled on each cover plate in side A. Compressed air can only be supplied to each two-position five-way solenoid valve when the two-position three-way safety solenoid valve is energized. The control unit 101 can control the energization or de-energization of the two-position five-way solenoid valves to retract or extend the corresponding cylinders. When the two-position five-way solenoid valve is energized… Figure 11 High-pressure air flows through the left chamber of the cylinder, while air flows through the right chamber. The cylinder retracts, and the corresponding cover opens. When the two-position five-way solenoid valve is de-energized... Figure 11 The left chamber of the cylinder is vented to air, and the right chamber is vented to high-pressure air. When the cylinder extends, the corresponding cover closes. In addition, two chambers in each cylinder are connected to air through a muffler 1102, and the two-position three-way solenoid valve can also be connected to air through the muffler 1102.

[0112] Optionally, in single-cover mode, the specific cover identifier corresponding to the aluminum electrolysis cell can be selected on the touchscreen. For example, if this cover is the target cover, the control unit will send a signal to control the alarm to sound for a preset time before stopping, alerting those nearby that the cover is about to be opened. The control unit issues a control command to energize the telescopic solenoid valve corresponding to the target cover, and the second drive component begins to retract. During this process, the control unit first detects that the limit switch of the second drive component is closed when extended, and then detects that the limit switch of the second drive component is closed when retracted. If either of these two limit switches (the second limit switches) fails to close after the target cover's telescopic solenoid valve has been energized for the preset time, the solenoid valves remain in their current state, interrupting the opening of the target cover. The alarm will continue to sound, display fault information on the control box's touchscreen, and send fault information to the host computer. If, after a preset time, the telescopic solenoid valve corresponding to the target cover is energized and the corresponding second limit switch closes normally, the control unit outputs a control command to energize the tilting solenoid valve corresponding to the target cover, and the first drive component begins to retract. During this process, the control unit first detects that the first drive component's extended position limit switch is closed, and then detects that the first drive component's retracted position limit switch is closed. If, after a preset time, the tilting solenoid valve corresponding to the target cover is energized, any of the corresponding first limit switches fails to close, all solenoid valves remain in their current state, interrupting the opening of the target cover, triggering a continuous alarm, displaying fault information on the control box's touchscreen, and sending fault information to the host computer. When the cover is fully open, both the telescopic and tilting solenoid valves are energized, and the corresponding first and second limit switches are closed.

[0113] In addition, since the other limit switch in each group of second limit switches is located on the flip cover of the adjacent cover, the change of the other limit switch in the second limit switch can be ignored when the flip cover of the adjacent cover is in the open state. For example, if the cover A(1) on the right side of cover A(2) is open, the second limit switch located on cover A(1) will affect the normal judgment of cover A(2), and the change of the second limit switch located on cover A(1) can be ignored.

[0114] In some implementations, in single-cover mode, selecting the cover indicator corresponding to the side of the electrolytic cell to be closed, such as the target cover, on the touchscreen triggers a signal from the control unit to activate the alarm for a preset duration before stopping, alerting those nearby that the cover is about to be closed. The control unit then issues a control command to de-energize the solenoid valve corresponding to the target cover, causing the first actuator to extend. During this process, the control unit first detects that the first actuator's retracted position's normally open limit switch has opened, and then detects that the first actuator's extended position's normally closed limit switch has opened. If, after the preset time of de-energization of the solenoid valve corresponding to the target cover, any of the corresponding first limit switches has not opened, all solenoid valves remain in their current state, interrupting the cover-closing operation. The alarm continues to sound, displaying fault information on the control box's touchscreen and sending fault information to the host computer. If, after the preset time of de-energization of the solenoid valve corresponding to the target cover, the corresponding first limit switch has opened normally, the control unit sends a signal to de-energize the telescopic solenoid valve corresponding to the target cover, causing the telescopic cylinder to extend. During this process, the control unit first detects that the second actuator's retracted position's normally open limit switch has opened, and then detects that the second actuator's extended position's normally closed limit switch has opened. If, after a preset time of de-energization of the telescopic solenoid valve corresponding to the target cover, any of the corresponding second limit switches fails to open, all solenoid valves will remain in their current state, interrupting the target cover closure operation. An alarm will continuously sound, displaying fault information on the control box's touchscreen and sending fault information to the host computer. Under normal circumstances, when the cover is fully closed, both the telescopic and tilting solenoid valves are de-energized, and the corresponding first and second limit switches are open.

[0115] In this embodiment of the application, when replacing the anode carbon block in the aluminum electrolysis cell, it is necessary to use a crane and jackhammer to clean the adhesion between the carbon block and adjacent carbon blocks. Therefore, it is also necessary to expose the contact portions of the two anode carbon blocks adjacent to the carbon block. Figure 6As shown, if replacing anode carbon block 1 on side A, cover plate A(1) must be fully opened and cover plate A(2) must be in a half-open state. Cover plate A(1) only has a first driving component, a flip-to-extend limit switch, and a flip-to-retract limit switch. Its opening and closing process only requires flipping. If replacing anode carbon block 2 on side A, cover plate A(2) must be fully opened. If replacing anode carbon block 3 on side A, cover plate A(2) must be fully opened and cover plate A(3) must be in a half-open state. The cover plate numbers corresponding to anode carbon blocks 4, 6, 8, 10, and 12 on side A are similar to those of anode carbon block 2. The cover plate numbers corresponding to anode carbon blocks 5, 7, 9, and 11 on side A are similar to those of anode carbon block 3. The cover plate numbers corresponding to anode carbon blocks on side B are similar to those on side A. The closing process is the reverse of the opening process. The following example of replacing anode carbon block 3 will illustrate the opening and closing processes of the cover plate.

[0116] In some implementations, when the anode carbon block replacement mode is selected on the touchscreen, and anode carbon block number 3 is selected and opened, the control unit sends a signal to the alarm to sound for a preset time and then stop, reminding those nearby that the cover is about to be opened. Then the control unit sends a control command to simultaneously energize the telescopic solenoid valves corresponding to cover A(2) and A(3), and the second drive components of cover A(2) and A(3) simultaneously begin to retract. During this process, the control unit detects that the limit switches of the second drive components of cover A(2) and A(3) are closed when they are extended to the limit position, and then detects that the limit switches of the second drive components of cover A(2) and A(3) are closed when they are retracted to the limit position. If any of the second limit switches corresponding to the telescopic solenoid valves of cover A(2) and A(3) are not closed after the preset time of energization, each solenoid valve remains in its current state, interrupting the cover opening operation, continuously triggering the alarm, displaying fault information on the touchscreen of the control box, and sending fault information to the host computer. If the second limit switch corresponding to the telescopic solenoid valves of cover plates A(2) and A(3) closes normally after a preset time of energization, the control unit issues a control command to energize the flip solenoid valve corresponding to cover plate A(2), and the first drive component corresponding to A(2) begins to retract. During this process, the control unit first detects that the limit switch corresponding to the first drive component of cover plate A(2) is closed when extended, and then detects that the limit switch corresponding to the first drive component of cover plate A(2) is closed when retracted. If any of the first limit switches corresponding to the flip solenoid valves of cover plate A(2) fails to close after a preset time of energization, each solenoid valve remains in its current state, the cover opening operation is interrupted, the alarm continuously sounds, the fault information is displayed on the touch screen of the control box, and the fault information is sent to the host computer.

[0117] In some implementations, in the anode carbon block replacement mode, when selecting the anode carbon block replacement mode on the touchscreen, selecting anode carbon block number 3 and closing, the control unit sends a signal to the alarm, which will stop after a preset time, to remind those nearby that the cover is about to be opened. The control unit sends a signal to de-energize the flip solenoid valve corresponding to cover A(2), and the first drive component corresponding to A(2) begins to extend. During this process, the control unit first detects that the first drive component corresponding to cover A(2) is retracted and the normally open limit switch is disconnected, and then detects that the first drive component corresponding to cover A(2) is extended and the normally closed limit switch is disconnected. If, after the first drive component corresponding to cover A(2) is de-energized for a preset time, any of the corresponding first limit switches has not been disconnected, then each solenoid valve remains in its current state, interrupting the cover closing operation, continuously triggering an alarm, displaying fault information on the touchscreen of the control box, and sending fault information to the host computer. If the first drive component corresponding to cover plate A(2) loses power for a preset time and the corresponding first limit switch is open normally, the control unit sends a signal to de-energize the telescopic solenoid valves corresponding to cover plate A(2) and A(3). Simultaneously, the second drive components corresponding to cover plate A(2) and A(3) begin to extend. During this process, the control unit first detects that the normally open limit switch of the second drive component corresponding to cover plate A(2) and A(3) is disconnected when it retracts to the position, and then detects that the normally closed limit switch of the second drive component corresponding to cover plate A(2) and A(3) is disconnected when it extends to the position. If, after the telescopic solenoid valves corresponding to cover plate A(2) and A(3) lose power for a preset time and any of the corresponding second limit switches are not disconnected, each solenoid valve remains in its current state, the cover plate closing operation is interrupted, the alarm continuously sounds, fault information is displayed on the touchscreen of the control box, and fault information is sent to the host computer.

[0118] In addition, the opening and closing process of the cover plate assembly for other anode carbon blocks is similar, and the correspondence between the anode guide rod and the cover plate assembly is shown in Table 1. In any mode, if the power supply is interrupted, all solenoid valves will be de-energized, and the state of all cover plate assemblies will only be affected by gravity.

[0119] Table 1

[0120]

[0121]

[0122] It should be noted that the preset duration can be 5 seconds, 6 seconds, or other durations; this application embodiment does not impose specific limitations on this. The alarm can be an audible and visual alarm. The first driving component can be a tilting cylinder, and the second driving component can be a telescopic cylinder.

[0123] In this embodiment, an alarm sounds before the cover is opened or closed to alert nearby workers. When the power supply is interrupted, both the safety and control solenoid valves are de-energized, and the air supply to all other solenoid valves is cut off. The cover assembly is then only affected by gravity, allowing for manual pushing, pulling, and flipping. Power interruption can be achieved via an emergency button outside the control box, while safety solenoid valve de-energization can be achieved via two rotary switches (one controlling the cover on side A, and the other controlling the cover on side B). In situations where an unmanned workshop is not currently feasible, a manual ball valve can be added to the air supply end of each cylinder. Users can manually close the ball valve before operation to prevent abnormal closure of the cover. Each cover assembly is monitored by a corresponding limit switch to promptly detect any abnormalities during opening and closing. A power supply detection module is included to promptly detect power supply fault information. When a fault occurs, the alarm will sound, the touchscreen and host computer will display the fault information, and the workshop speakers can also play the fault information.

[0124] Optionally, this application embodiment also provides a control system for the cover plate of an aluminum electrolytic cell. Each aluminum electrolytic cell is provided with multiple cover plates, and each cover plate of the aluminum electrolytic cell has a corresponding control box and a gas path control box. The control box is as described above. Figures 1 to 11 The control box for any of the aluminum electrolysis cell cover plates described above.

[0125] The control boxes are connected in parallel via communication circuits, and the communication circuit in the last control box is connected to the host computer via a converter module.

[0126] In addition, the host computer adopts a centralized-distributed control mode, which is currently a mature technology used in aluminum electrolysis plants for cell control. The host computer and the control box communicate via CAN bus, while fiber optic communication is used between the host computer and the server due to the long distance between them.

[0127] Figure 12 This is a schematic diagram of the control system for the aluminum electrolytic cell cover plate provided in the embodiments of this application, as shown below. Figure 12 The diagram shows the topology consisting of the control box, host computer, and server. There are N electrolytic cells in total, with cell number 1 on the far right and increasing sequentially to the left, ending with cell number N on the far left. Each electrolytic cell in the work area is equipped with: a control box 10, a gas circuit control box 20, an alarm 105, a first drive unit 404, a second drive unit 403, and a limit switch.

[0128] A shielded twisted-pair cable is used to connect the CAN communication circuit from control box 10 in slot 1 to control box 2 in slot 2. Then, a shielded twisted-pair cable is connected in parallel from control box 10 in slot 2 to connect the CAN communication circuit to control box 3 in slot 3. Next, shielded twisted-pair cables are used to connect the communication circuits of adjacent control boxes 10 in parallel, completing the CAN communication connection from control box 4 in slot 4 to control box 8 in slot N. Finally, a shielded twisted-pair cable is connected in parallel from slot N to the CAN-to-Ethernet module 7, and then connected to the host computer 8 via a network cable.

[0129] Since the control box 10 of slot 1 is an end device of CAN communication, a short-circuit ring needs to be used on its control circuit board to short-circuit connector J1, and a 120-ohm resistor needs to be connected in parallel to one end of the CAN bus. The workshop host computer 8 uses network cable 11 to connect to the optical-to-Ethernet module 13 via router 12, and then via fiber optic cable 14 to the optical-to-Ethernet module 13 in the aluminum electrolysis plant control center, and then uses network cable 11 to connect to server 15. The workshop host computer 8 is connected to power amplifier 9, and power amplifier 9 is connected to speakers 16 distributed throughout the workshop. Additionally, a 120-ohm resistor can also be connected in parallel to the other end of the CAN bus to match the bus impedance.

[0130] The control box periodically uploads real-time status information to the host computer 8 via CAN communication. The host computer 8 displays the status and fault information of each aluminum electrolysis cell cover assembly, each limit switch, each solenoid valve, and other equipment. It has the function of issuing control commands for switching each aluminum electrolysis cell cover assembly. It also has the function of communicating with the server, periodically uploading information to the server, and downloading and viewing historical information from the server. The server software also has the functions of viewing current information, historical information, and issuing control commands to the host computer 8.

[0131] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A control system for an aluminum electrolytic cell cover plate, characterized in that, include: Multiple aluminum electrolytic cells, each of which is equipped with multiple cover plates, and each cover plate of the aluminum electrolytic cell has a corresponding control box and a gas path control box; Each cover plate of the aluminum electrolysis cell includes: a flip cover plate and a first driving member; one end of the first driving member is fixedly disposed on an edge plate of each cover plate corresponding to an aluminum electrolysis cell, and the other end of the first driving member is fixedly connected to the outer surface of the flip cover plate. The control box includes a control unit, a touch screen, a load drive circuit, and a communication circuit. The control boxes are connected in parallel via the communication circuit. The communication circuit in the last control box is connected to a host computer via a converter module. The control unit in each control box is connected to the corresponding solenoid valve in the corresponding pneumatic control box via the load drive circuit. The control unit and the touch screen are electrically connected to receive input control commands. The control unit is also electrically connected to the input terminal of the load drive circuit to determine the cover plate to be controlled from among the multiple cover plates of the aluminum electrolysis cell according to the control commands, and to input the control level corresponding to the cover plate to be controlled to the load drive circuit. The first output terminal of the load drive circuit is connected to multiple sets of flip solenoid valves. Each set of flip solenoid valves is installed in the air circuit control box. Each set of flip solenoid valves is driven to both ends of the first drive member in each cover plate, so that the load drive circuit outputs a flip control level to the flip solenoid valve corresponding to the cover plate to be controlled according to the control level. Thus, under the action of the flip control level, the flip solenoid valve drives the first drive member in the cover plate to be controlled to drive the flip cover plate to flip. The plurality of cover plates include a plurality of first cover plates and a second cover plate. The first cover plate further includes: a telescopic cover plate and a second driving member. One end of the second driving member is disposed on the outer surface of the flip cover plate in the first cover plate, and the other end of the second driving member is disposed on the surface of the telescopic cover plate facing the flip cover plate. The second output terminal of the load drive circuit is connected to multiple sets of telescopic solenoid valves. Each set of telescopic solenoid valves is located in the gas control box. Each set of telescopic solenoid valves is driven by the second drive component in each first cover plate. This allows the load drive circuit to output a telescopic control level to the telescopic solenoid valve located on the aluminum electrolysis cell corresponding to the cover plate to be controlled, based on the control level. As a result, the telescopic solenoid valve drives the second drive component in the cover plate to be controlled, thereby causing the telescopic cover plate to telescopically extend or retract under the action of the telescopic control level.

2. The control system according to claim 1, characterized in that, The third output terminal of the load drive circuit is connected to multiple sets of safety solenoid valves, each set of safety solenoid valves is located in the pneumatic control box; each set of safety solenoid valves is connected to multiple sets of tilting solenoid valves and multiple sets of telescopic solenoid valves respectively.

3. The control system according to claim 2, characterized in that, The control box further includes: a limit switch monitoring circuit, wherein multiple input terminals of the limit switch monitoring circuit are respectively connected to multiple limit switches; the multiple limit switches include: multiple sets of first limit switches and multiple sets of second limit switches; one limit switch in each set of first limit switches is disposed on the flip cover, and the other limit switch in each set of first limit switches is disposed on the first drive member; one limit switch in each set of second limit switches is disposed on the flip cover, and the other limit switch in each set of second limit switches is disposed on the flip cover of an adjacent cover; The output of the limit switch monitoring circuit is connected to the control unit to output the open / closed state of the limit switch corresponding to the cover to be controlled to the control unit, so that the control unit can detect whether the cover to be controlled has a switch failure based on the open / closed state.

4. The control system according to claim 3, characterized in that, The fourth output terminal of the load drive circuit is connected to the alarm. The control unit is used to input a fault level to the load drive circuit when a switch failure is detected in the cover plate to be controlled, so that the load drive circuit controls the alarm to output an alarm signal based on the fault level.

5. The control system according to claim 4, characterized in that, Each of the multiple sets of tilting solenoid valves, the multiple sets of telescopic solenoid valves, and the multiple sets of safety solenoid valves is electrically connected to a power source. The control box is also equipped with a power electrical detection module, which is connected in parallel to the power supply to determine whether the power supply to each solenoid valve is normal. The output of the power detection module is also connected to the control unit, so that when the control unit determines that the power supply to each solenoid valve is abnormal, it inputs the fault level to the load drive circuit, so that the load drive circuit controls the alarm to output an alarm signal based on the fault level.

6. The control system according to claim 3, characterized in that, The control box is also equipped with a power module, the input terminal of which is electrically connected to a logic power supply; the first output terminal of the power module is electrically connected to the limit switch monitoring circuit, the touch screen and the load drive circuit to provide power. The second output terminal of the power module is also electrically connected to the control unit to supply power to the control unit.

7. The control system according to claim 4, characterized in that, The control box is also equipped with input / output interfaces; The first output terminal of the load drive circuit is connected to the multiple sets of tilting solenoid valves through the input / output interface; the second output terminal of the load drive circuit is connected to the multiple sets of telescopic solenoid valves through the input / output interface; the third output terminal of the load drive circuit is connected to the multiple sets of safety solenoid valves through the input / output interface; and the fourth output terminal of the load drive circuit is connected to the alarm through the input / output interface. The limit switch monitoring circuit is connected to the multiple sets of safety solenoid valves through the input / output interface; The control unit is connected to the touch screen via the input / output interface.

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