Steam overflow prevention control system and control method for continuous casting crystallizer

Abstract

The invention discloses a steam overflow prevention control system and method for a continuous casting crystallizer, and belongs to the technical field of continuous casting crystallizers. According to the steam exhaust system, tight sealing of the upper portion of the crystallizer can be guaranteed, on the premise that steam is effectively prevented from eroding a width adjusting motor, rapid and convenient disassembly and assembly of a cover plate are achieved, and intelligent adjustment can be achieved. The control system comprises a continuous casting crystallizer body and a sealing cover, the sealing cover comprises a sealing cover body and a sealing plate, attraction force is generated between the sealing plate and the magnetic part, and through holes are formed in the positions, corresponding to the sealing plate, of the sealing plate so that the interior of the continuous casting crystallizer can be sealed. The sealing plate comprises at least one movable cover plate, and a universal shaft hole is formed in the movable cover plate and allows the universal shaft to penetrate through. The control system further comprises a secondary cooling fan, an induced draft fan, a controller, a first humidity detection piece and a second humidity detection piece. The secondary cooling fan, the induced draft fan, the first humidity detection piece and the second humidity detection piece are electrically connected with the controller.

Description

Technical Field

[0001] This application belongs to the field of continuous casting crystallizer technology, and particularly relates to a control system and control method for preventing steam overflow in a continuous casting crystallizer. Background Technology

[0002] Continuous casting is one of the core processes in modern steel production. During continuous casting, high-temperature molten steel is cooled by high-pressure water through copper plates in the crystallizer, rapidly solidifying into a billet shell of a certain thickness. The billet is then pulled out of the crystallizer and enters the secondary cooling zone (secondary cooling zone), where water spray cooling solidifies the internal liquid core, ultimately forming a continuous billet. During this process, the cooling water in the secondary cooling zone comes into contact with the high-temperature billet, generating a large amount of high-temperature steam. This steam is typically confined within the relatively enclosed secondary cooling chamber and forcibly removed by the negative pressure generated by the secondary cooling fans to prevent it from overflowing into the production workshop and affecting equipment safety, the production environment, and product quality.

[0003] However, since the crystallizer and the secondary cooling chamber are spatially connected, and the crystallizer is located above the casting process, if the upper part of the crystallizer is not tightly sealed, high-temperature steam from the secondary cooling chamber will first overflow from the top of the crystallizer. This not only deteriorates the operating environment, but more seriously, it can cause corrosion and damage to critical equipment above and around the crystallizer. Currently, production mainly achieves upper sealing by installing a crystallizer cover plate. However, due to frequent daily maintenance and troubleshooting, the cover plate needs to be frequently lifted and lowered by overhead cranes, which places high demands on the ease of design and sealing reliability of the cover plate itself.

[0004] To achieve online adjustment of the billet width, a width-adjusting motor drives the copper plate of the crystallizer via a universal joint and other transmission mechanisms. The placement of this motor faces a dilemma: Enclosing the motor within the crystallizer cover, while simplifying the overall structure, exposes the motor to a high-temperature steam risk environment. Even with a separate sealed cover and compressed air to maintain positive pressure, maintaining this pressure continuously is difficult. More importantly, steam can easily seep into the motor through the gaps at the connection between the output shaft and the universal joint, leading to decreased insulation, corrosion of parts, and a significant shortened lifespan. While placing the motor outside the cover avoids the main steam zone, it results in an unusually complex cover shape, hindering effective overall sealing. Furthermore, the removal and installation of this irregularly shaped cover are extremely difficult, severely impacting maintenance efficiency.

[0005] Therefore, there is an urgent need for a steam exhaust system that can ensure the upper part of the crystallizer is tightly sealed, effectively prevent steam from eroding the motor, and at the same time enable the cover plate to be quickly and conveniently disassembled and installed, and can be intelligently adjusted. Summary of the Invention This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a continuous casting crystallizer anti-steam overflow control system and control method, which can ensure that the upper part of the crystallizer is tightly sealed and effectively prevent steam from eroding the adjustable motor, while realizing the quick and convenient disassembly and assembly of the cover plate, and can intelligently adjust the exhaust steam to prevent steam overflow from the continuous casting crystallizer.

[0006] In a first aspect, embodiments of this application provide a continuous casting crystallizer steam overflow prevention control system, including: The continuous casting crystallizer body and the sealing cover disposed on one side of the opening of the continuous casting crystallizer body, wherein the sealing cover can form a sealed space inside the continuous casting crystallizer; The sealing cap includes: The sealing cap body has at least one through hole and is provided with a magnetic element. At least one sealing plate that generates an attractive force with the magnetic element and covers the through hole at a corresponding location to seal the interior of the continuous casting crystallizer; The sealing plate includes at least one movable cover plate, which includes a first cover plate and a second cover plate. The first cover plate and the second cover plate are movable relative to each other. The first cover plate is provided with a first shaft hole, and the second cover plate is provided with a second shaft hole. When the axes of the first shaft hole and the second shaft hole coincide, the first shaft hole and the second shaft hole form a universal joint hole. The radius of the universal joint hole is larger than the radius of the universal joint, so that a universal joint can pass through. The continuous casting crystallizer anti-steam overflow control system also includes a secondary cooling fan, an induced draft fan, and a controller. The secondary cooling fan is used to discharge the steam inside the continuous casting crystallizer through the steam exhaust main pipe. The induced draft fan is connected to the movable cover plate through an induced draft pipe and is used to draw air into the universal joint hole. A first humidity detection element is installed on the main steam exhaust pipe, and a second humidity detection element is installed on the universal joint hole. The two air coolers, the induced draft fan, the first humidity detection element, and the second humidity detection element are electrically connected to the controller.

[0007] In some embodiments, the sealing plate includes two movable cover plates, which are movable relative to each other and have a first thickness and a second thickness, wherein the first thickness is greater than the second thickness. The movable cover plate having a first thickness has a mounting groove on the side facing the movable cover plate having a second thickness. The movable cover plate having the second thickness can be inserted into the mounting groove on the side facing the movable cover plate having the first thickness to connect the two movable cover plates.

[0008] In some embodiments, the movable cover plate is provided with a horn cover on the side outside the continuous casting crystallizer, one end of the horn cover is connected to the universal joint hole, and the diameter of the horn cover gradually increases in the direction away from the universal joint hole; The horn cover is provided with several air blowing pipes, the axis of the air blowing pipes is parallel to the axis of the universal joint hole, the air inlet of the air blowing pipes is connected to the air duct, and the air outlet of the air blowing pipes faces the inside of the horn cover.

[0009] In some embodiments, a plurality of the blow tubes are arranged in a rotatable array around the axis of the cylinder of the horn cover.

[0010] In some embodiments, the movable cover plate is further provided with an annular hose on the side outside the sealing plate, and a plurality of the blower pipes are connected to the induced draft fan through the annular hose.

[0011] In some embodiments, the annular hose includes a first sub-hose disposed on the first cover plate and a second sub-hose disposed on the second cover plate, the first sub-hose and the second sub-hose being connected by a quick connector.

[0012] In a second aspect, embodiments of this application provide a method for preventing steam overflow in a continuous casting mold, applied to the continuous casting mold steam overflow control system of the first aspect, the method comprising: If a casting status signal of the continuous casting machine is received, the first humidity at the exhaust steam main and the second humidity at the universal joint hole are obtained; the speed of the second cooling fan and the speed of the induced draft fan are controlled according to the first humidity and the second humidity. The first humidity and the rotational speed of the second cooling fan have a first mapping relationship, the second humidity and the rotational speed of the second cooling fan have a second mapping relationship, and the second humidity and the rotational speed of the induced draft fan have a third mapping relationship.

[0013] In some embodiments, controlling the rotational speed of the two cooling fans and the rotational speed of the induced draft fan based on the first humidity and the second humidity includes: If the second humidity is less than or equal to the first preset humidity, the rotation speed of the two cooling fans is controlled according to the first mapping relationship and the first humidity. If the second humidity is greater than the first preset humidity and less than or equal to the second preset humidity, then the rotation speed of the second cooling fan is controlled according to the second mapping relationship and the second humidity, wherein the second preset humidity is greater than the first preset humidity, and the rotation speed of the second cooling fan determined according to the second mapping relationship and the second humidity is greater than the rotation speed of the second cooling fan determined according to the first mapping relationship and the first humidity. If the second humidity is greater than the second preset humidity, the rotation speed of the second cooling fan is controlled according to the second mapping relationship and the second humidity, and the operation of the induced draft fan is also controlled. Furthermore, the rotation speed of the induced draft fan is controlled according to the third mapping relationship and the second humidity.

[0014] In some embodiments, the interval between each adjustment of the rotational speed of the two cooling fans is less than a first preset time.

[0015] In some embodiments, the continuous casting crystallizer steam overflow control method further includes: When a casting status signal is received from the continuous casting machine, the second cooling fan is controlled to run at a first preset speed.

[0016] In the continuous casting mold steam overflow prevention control system of this application, the sealing cover is disassembled into a sealing cover body and a sealing plate. The sealing plate includes at least one movable cover plate, and the movable cover plate includes a first cover plate and a second cover plate that can move relative to each other, enabling quick assembly and disassembly of the mold cover plate. The first and second shaft holes of the first and second cover plates constitute universal joint holes, through which a universal joint can pass. At the same time, the sealing plate and the sealing plate body are held in an adsorption state by magnetic components. When the continuous casting mold vibrates, the universal joint may also vibrate, and the sealing plate and the sealing plate body can shift relative to each other during vibration, thereby preventing the continuous vibration of the continuous casting mold from affecting the driving function of the universal joint. In this way, although the width adjustment motor is completely located outside the continuous casting mold, steam can be completely prevented from entering the width adjustment motor, preventing steam from corroding the width adjustment motor and extending its service life. It can also ensure the normal width adjustment function of the width adjustment motor. In addition, this application uses the synergistic effect of the secondary cooling fan and the induced draft fan to minimize steam overflow. The steam overflow prevention control method uses intelligent control to not only improve the control efficiency of steam overflow prevention, but also adjusts the speed of the secondary cooling fan and the induced draft fan according to different humidity levels. While adjusting the speed to discharge steam in a timely manner, it can also save energy and extend the service life of the equipment. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1This is an overall diagram of a continuous casting crystallizer anti-steam overflow control system provided in an embodiment of this application; Figure 2 This is a schematic top view of a sealing cover for a continuous casting crystallizer provided in an embodiment of this application; Figure 3 This is a schematic front view of a sealing cover for a continuous casting crystallizer provided in an embodiment of this application; Figure 4 This is a schematic side view of a sealing cover for a continuous casting crystallizer provided in an embodiment of this application; Figure 5 yes Figure 2 Enlarged view of area A in the middle; Figure 6 yes Figure 3 Enlarged view of area B in the middle; Figure 7 This is a schematic diagram showing the positional relationship between the first cover plate and the second cover plate provided in an embodiment of this application; Figure 8 This is another schematic diagram showing the positional relationship between the first cover plate and the second cover plate provided in the embodiments of this application; Figure 9 This is another schematic diagram showing the positional relationship between the first cover plate and the second cover plate provided in the embodiments of this application; Figure 10 This is a schematic diagram of the installation of the speaker cover and the blower pipe provided in the embodiments of this application; Figure 11 This is another schematic diagram of the installation of the speaker cover and the blower pipe provided in the embodiments of this application; Figure 12 This is a flowchart of a method for preventing steam overflow in a continuous casting crystallizer, provided in an embodiment of this application. Figure 13 This is a flowchart of another method for preventing steam overflow in a continuous casting crystallizer provided in the embodiments of this application. Detailed Implementation

[0018] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0019] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, the requirement defined by the phrase "comprising one..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0020] To achieve online adjustment of the billet width, a width-adjusting motor drives the copper plate of the crystallizer via a universal joint and other transmission mechanisms. The placement of this motor faces a dilemma: Enclosing the motor within the crystallizer cover, while simplifying the overall structure, exposes the motor to a high-risk steam environment. Even with a separate sealed enclosure and compressed air to maintain positive pressure, maintaining this pressure continuously is difficult. More importantly, steam can easily seep into the motor through the gaps at the connection between the output shaft and the universal joint, leading to decreased insulation, corrosion of components, and a significant shortened lifespan. While placing the motor outside the cover avoids the main steam zone, it results in an unusually complex cover shape, hindering effective overall sealing. Furthermore, the removal and installation of this irregularly shaped cover are extremely difficult, severely impacting maintenance efficiency.

[0021] Therefore, there is an urgent need for a steam exhaust system that can ensure the upper part of the crystallizer is tightly sealed, effectively prevent steam from eroding the motor, and at the same time enable the cover plate to be quickly and conveniently disassembled and installed, and can be intelligently adjusted.

[0022] In view of this, the embodiments of this application provide a continuous casting crystallizer anti-steam overflow control system and control method, which can ensure that the upper part of the crystallizer is tightly sealed and effectively prevent steam from eroding the motor, while realizing the quick and convenient disassembly and assembly of the cover plate, and can intelligently adjust the exhaust steam to prevent steam overflow from the continuous casting crystallizer.

[0023] Figure 1 This is an overall diagram of a continuous casting crystallizer steam overflow prevention control system provided in an embodiment of this application. In a first aspect, this application provides a continuous casting crystallizer steam overflow prevention control system, such as... Figure 1As shown, the continuous casting mold steam overflow prevention control system of this application includes a continuous casting mold body 10 and a sealing cover 20 disposed on one side of the opening of the continuous casting mold body. The frame of the continuous casting mold body 10 is a trough-shaped container, therefore the continuous casting mold body 10 can be rectangular. The continuous casting mold body 10 may also include a copper plate, a cooling system, a vibration system, and an adjustment system, but these structures are not shown for the sake of simplicity. Therefore, the continuous casting mold body 10 itself is a frame body with a receiving cavity, and an opening can be provided at the top of the continuous casting mold body 10.

[0024] like Figure 1 As shown, the sealing cover 20 can be disposed on the opening side of the continuous casting mold body 10, that is, on the top of the continuous casting mold body 10. In this way, the sealing cover 20 can seal the receiving cavity inside the continuous casting mold body 10 into a sealed space. The sealing cover 20 and the continuous casting mold body 10 can be fixedly connected, for example, by welding; or they can be detachably connected, for example, by snap-fit ​​connection. This application embodiment does not limit the connection method between the sealing cover 20 and the continuous casting mold body 10.

[0025] like Figures 2 to 6 As shown, the sealing cover 20 includes a sealing plate body 201. At least one through hole 2011 is formed on the sealing plate body 201. A magnetic element 2012 is also provided on the sealing plate body 201. The sealing cover 20 also includes at least one sealing plate 202. An attractive force is generated between the sealing plate 202 and the magnetic element 2012, and the sealing plate 202 can cover the through hole 2011 at the corresponding position. Thus, although the through hole 2011 is formed, it can be sealed by the sealing plate 202, thereby sealing the interior of the continuous casting crystallizer. The sealing plate 202 can also be a magnetic plate or a metal plate. This application embodiment does not limit the material of the sealing plate 202, as long as it ensures that the sealing plate 202 and the magnetic element 2012 can be attracted to each other, allowing the sealing plate 202 to be firmly adsorbed onto the sealing plate body 201.

[0026] When the sealing plate 202 is attached to the surface of the sealing plate body 201, the sealing plate 202 is attracted to the surface of the sealing plate body 201 by the attraction between the sealing plate 202 and the magnetic element 2012, preventing it from falling off the surface of the sealing plate body 201. This is how the sealing plate 202 is connected to the sealing plate body 201.

[0027] Specifically, a receiving groove can be provided on the sealing plate body 201 for accommodating the magnetic component 2012. For example, such as... Figure 6As shown, the through hole 2011 can be U-shaped, and the magnetic component 2012 can be distributed along the U-shaped edge of the through hole 2011. This allows the sealing plate 202 to be more firmly attached to the area around the through hole 2011, achieving a tight cover over the through hole 2011, thereby sealing the inside of the continuous casting mold.

[0028] like Figure 7 and Figure 8 As shown, the sealing plate 202 includes at least one movable cover plate, which includes a first cover plate 2021 and a second cover plate 2022. The first cover plate 2021 and the second cover plate 2022 are movable relative to each other. The first cover plate 2021 is provided with a first shaft hole 2023, and the second cover plate 2022 is provided with a second shaft hole 2024. When the axes of the first shaft hole 2023 and the second shaft hole 2024 coincide, the first shaft hole 2023 and the second shaft hole 2024 form a universal joint hole, through which a universal joint can pass.

[0029] In other words, neither the first shaft hole 2023 nor the second shaft hole 2024 is a complete circular hole. When the first shaft hole 2023 and the second shaft hole 2024 are put together, they form a complete universal joint hole. The universal joint of the drive device (such as a width-adjusting motor) can pass through the universal joint hole and extend into the interior of the continuous casting mold, thereby realizing the driving function of the universal joint.

[0030] like Figure 7 As shown, a semi-circular first shaft hole 2023 can be provided on the first cover plate 2021, and a semi-circular second shaft hole 2024 can be provided on the second cover plate 2022. The positions of the width-adjusting motor and the universal joint M are fixed. Before sealing the inside of the continuous casting mold, the first cover plate 2021 and the second cover plate 2022 are located on both sides of the universal joint M. Then, during the installation to seal the inside of the continuous casting mold, the first cover plate 2021 and the second cover plate 2022 are moved simultaneously, so that the first cover plate 2021 and the second cover plate 2022 move towards each other. Until the first cover plate 2021 and the second cover plate 2022 contact, as shown... Figure 8 The state shown.

[0031] like Figure 8 As shown, when the axes of the first shaft hole 2023 and the second shaft hole 2024 coincide, the first shaft hole 2023 and the second shaft hole 2024 form a universal joint hole. The universal joint hole allows the universal joint M to pass through. If it is necessary to remove the movable cover plate, the first cover plate 2021 and the second cover plate 2022 can be moved directly, so that the first cover plate 2021 and the second cover plate 2022 move in opposite directions, thereby removing the sealing plate from the continuous casting mold.

[0032] It should be noted that the sealing plate body 201 in this embodiment can be provided with multiple through holes 2011, and through holes 2011 can be provided at the positions where the universal joint M is provided. Then, a sealing plate 202 is provided for each through hole 2011, and each sealing plate 202 covers the corresponding through hole 2011 in the manner described in the above embodiment, thereby achieving a seal for the inside of the continuous casting mold. For example, Figure 3 As shown, the sealing plate body 201 can be provided with two through holes 2011, and a sealing plate 202 is provided on each through hole 2011. The sealing plate 202 at the corresponding position seals the through hole 2011. In this embodiment of the application, the number of through holes 2011 is not limited and can be set according to the number of adjustable motors.

[0033] The continuous casting mold provided in this application includes a continuous casting mold body 10 and a sealing cover 20, which allows a sealed space to be formed inside the continuous casting mold. The sealing cover 20 includes a sealing plate body 201 and a sealing plate 202. The sealing plate body 201 has a through hole 2011, and a magnetic element 2012 is provided on the edge of the through hole 2011. An attraction is generated between the sealing plate 202 and the magnetic element 2012, and the sealing plate 202 covers the through hole 2011 at the corresponding position to seal the inside of the continuous casting mold. The sealing plate 202 includes a movable cover plate, which includes a first cover plate 2021 and a second cover plate 2022. The first cover plate 2021 and the second cover plate 2022 are movable relative to each other. A first shaft hole 2023 is provided on the first cover plate 2021, and a second shaft hole 2024 is provided on the second cover plate 2022. When the axes of the first shaft hole 2023 and the second shaft hole 2024 coincide, the first shaft hole 2023 and the second shaft hole 2024 form a universal joint hole, through which the universal joint M can pass.

[0034] The sealing cover 20 of this application is first sealed to the continuous casting mold body 10, and the universal joint M passes through the sealing plate body 201 through the through hole 2011. Then, the first cover plate 2021 and the second cover plate 2022 are attached to the sealing plate body 201, and the first cover plate 2021 and the second cover plate 2022 are attracted to the sealing plate body 201 by the attraction between them and the magnetic component 2012. Then, the first cover plate 2021 and the second cover plate 2022 move relative to each other until the axes of the first shaft hole 2023 and the second shaft hole 2024 coincide to form a universal joint hole. The universal joint M passes through this universal joint hole, thereby realizing that the sealing plate 202 covers the through hole 2011 at the corresponding position, realizing the sealing of the inside of the continuous casting mold. During disassembly and assembly, only the first cover plate 2021 and the second cover plate 2022 need to be separated. Since the width adjustment motor is completely located outside the continuous casting mold, steam can be completely avoided from entering the width adjustment motor, thus extending the life of the width adjustment motor. It also enables quick disassembly and assembly of the mold cover plate. Meanwhile, the sealing plate 202 and the sealing plate body 201 are kept in an adsorption state through the magnetic component 2012. When the continuous casting crystallizer vibrates, the universal shaft M may also vibrate. The sealing plate 202 and the sealing plate body 201 can be relatively offset during the vibration, thereby avoiding the continuous vibration of the continuous casting crystallizer from affecting the driving function of the universal shaft.

[0035] like Figure 1 As shown, the continuous casting crystallizer anti-steam overflow control system of this application also includes a secondary cooling fan 30, an induced draft fan 40 and a controller. The secondary cooling fan 30 is used to discharge the steam inside the continuous casting crystallizer through the steam exhaust main pipe 301. The induced draft fan 40 is connected to the movable cover plate through the induced draft pipe 401 and is used to draw air into the universal joint hole.

[0036] A first humidity sensor 302 is installed on the main steam exhaust pipe 301, which can detect the humidity at the main steam exhaust pipe 301. A second humidity sensor (not shown in the figure) is installed on the universal joint hole, which can detect the humidity at the universal joint hole. The two cooling fans 30 and the induced draft fan 40 are electrically connected to the controller through their respective drive motors, and the first humidity sensor 302 and the second humidity sensor are also electrically connected to the controller. It should be noted that a second humidity sensor can be installed at each universal joint hole, and each universal joint hole can be connected to the induced draft fan 40 through an induced draft pipe 401, thereby realizing the induced draft of each universal joint hole.

[0037] The first humidity sensor 302 detects the first humidity at the steam exhaust manifold 301 and sends the first humidity data to the controller. The second humidity sensor detects the second humidity at the universal joint hole and sends the second humidity data to the controller. The controller generates a control signal based on the first and second humidity values ​​and sends the control signal to the drivers of the secondary cooling fan 30 and the induced draft fan 40, thereby controlling the speed of the secondary cooling fan 30 and the induced draft fan 40. By adjusting the speed of the secondary cooling fan 30, the rate at which steam is discharged from the crystallizer is regulated, and by adjusting the speed of the induced draft fan 40, steam overflow at the universal joint hole is prevented. This enables intelligent regulation of the entire anti-steam overflow system, minimizing steam overflow.

[0038] In some embodiments, a single through-hole 2011 corresponds to a structure with two width-adjusting motors and two universal joints M. The sealing plate 202 may include two movable cover plates, which are movable relative to each other and have a first thickness and a second thickness, respectively, with the first thickness being greater than the second thickness. The side of the movable cover plate with the first thickness facing the side with the second thickness has a mounting groove, and the side of the movable cover plate with the second thickness facing the side with the first thickness can be inserted into the mounting groove to connect the two movable cover plates.

[0039] For example, such as Figure 6 As shown, the sealing plate 202 may include two movable covers, an upper and a lower one, which can move relative to each other; that is, the upper and lower movable covers can move away from each other or towards each other. The upper movable cover has a first thickness, and the lower movable cover has a second thickness. The upper movable cover is provided with a mounting groove 2025. Since the first thickness is greater than the second thickness, the top of the lower movable cover can be inserted into the mounting groove 2025, thereby realizing the plug-in installation of the upper and lower movable covers.

[0040] The width of the upper movable cover plate can also be wider than the width of the lower movable cover plate. Alternatively, the width of the lower movable cover plate can be equal to the width of the mounting groove 2025, and the thickness of the lower movable cover plate can be equal to the depth of the mounting groove 2025. This allows the lower movable cover plate to be secured within the mounting groove 2025, thus achieving a fixed connection between the upper and lower movable cover plates.

[0041] It should be noted that the lower movable cover plate can also be wider and thicker than the upper movable cover plate. A mounting groove is then provided at the top of the lower movable cover plate. This allows the upper movable cover plate to be inserted downwards into the mounting groove of the lower movable cover plate, thus achieving a secure connection between the upper and lower movable cover plates.

[0042] like Figure 9As shown, before sealing the interior of the continuous casting mold, the first cover plate 2021 and the second cover plate 2022 of the upper movable cover plate are located on both sides of the universal joint M1, and the first cover plate 2021 and the second cover plate 2022 of the lower movable cover plate are located on both sides of the universal joint M2. Then, during the installation to seal the interior of the continuous casting mold, the first cover plate 2021 and the second cover plate 2022 of the upper movable cover plate are moved simultaneously, causing them to move towards each other until they contact each other.

[0043] Then move the first cover plate 2021 and the second cover plate 2022 of the lower movable cover plate so that the first cover plate 2021 and the second cover plate 2022 move towards each other until the first cover plate 2021 and the second cover plate 2022 contact each other. Then insert the top of the lower movable cover plate into the mounting groove 2025 of the upper movable cover plate to obtain the following result. Figure 6 The sealing condition is shown. It should be noted that... Figure 9 Only the basic structure of the first cover plate 2021 and the second cover plate 2022 is shown; other components are not shown. Based on the above embodiments, for structures with multiple universal joints, the sealing plate of this application embodiment can also achieve the effect of convenient installation and disassembly of the sealing plate.

[0044] In some embodiments, handles may be provided on the first cover plate 2021 and the second cover plate 2022. After the first cover plate 2021 and the second cover plate 2022 are attached to the sealing plate body 201, the positions of the first cover plate 2021 and the second cover plate 2022 can be adjusted by the handles so that the first cover plate 2021 and the second cover plate 2022 are completely in contact, thereby achieving the sealing of the inside of the continuous casting crystallizer by the sealing plate 202.

[0045] In some implementations, such as Figure 10 and Figure 11 As shown, a horn cover 203 is provided on one side of the movable cover plate inside the sealing cover 20. One end of the horn cover 203 is connected to the universal joint hole, and the diameter of the horn cover 203 gradually increases in the direction away from the universal joint hole.

[0046] The horn cover 203 is also equipped with several air blowing pipes 204. The axis of the air blowing pipes 204 is parallel to the axis of the universal joint hole. The air inlet of the air blowing pipe 204 is connected to the induced draft pipe 401, and the air outlet of the air blowing pipe 204 faces the interior of the continuous casting mold. The horn cover 203 can be welded to the sealing plate 202. Compressed air is blown into the horn cover 203 from the induced draft fan 40 through the air blowing pipes 204. The compressed air can then form a vortex inside the horn cover 203. Under the action of the vortex, steam leakage from the continuous casting mold can be effectively prevented.

[0047] like Figure 10As shown, several blow pipes 204 are arranged in a circular array on the horn cover 203. Furthermore, an annular hose 205 is provided on the side of the movable cover outside the sealing cover 20, and several blow pipes 204 are connected to the induced draft fan 40 through the annular hose 205.

[0048] See also Figure 10 The annular hose 205 includes a first sub-hose 2051 disposed on the first cover plate 2021 and a second sub-hose 2052 disposed on the second cover plate 2022. The first sub-hose 2051 and the second sub-hose 2052 are connected by a quick connector 2053. The quick connector 2053 allows for quick disassembly and installation of the first sub-hose 2051 and the second sub-hose 2052, thereby enabling quick disassembly and installation of the first cover plate 2021 and the second cover plate 2022.

[0049] Alternatively, a first connecting pipe can be installed on the annular flexible hose 205, and a second connecting pipe can be installed on the induced draft fan. The first and second connecting pipes can also be connected via quick-connect couplings, thereby enabling rapid separation of the entire sealing plate 202 from the induced draft fan 40.

[0050] In some embodiments, a seal is provided on the side of the first cover plate 2021 that contacts the second cover plate 2022. The seal can further prevent steam from escaping from the continuous casting mold.

[0051] Figure 12 This is a flowchart illustrating a method for preventing steam overflow in a continuous casting mold, as provided in an embodiment of this application. Secondly, this application provides a method for preventing steam overflow in a continuous casting mold, applied to the continuous casting mold steam overflow control system of the first aspect, such as... Figure 12 As shown, the method for preventing steam overflow in continuous casting crystallizers includes the following steps: Step S101: If a casting status signal of the continuous casting machine is received, the first humidity at the exhaust steam main pipe 301 and the second humidity at the universal joint hole are obtained; if a casting status signal of the continuous casting machine is received, it means that the casting operation has started; if a casting status signal of the continuous casting machine is not received, it means that the casting operation has not started, and it is not necessary to obtain the first humidity at the exhaust steam main pipe 301 and the second humidity at the universal joint hole.

[0052] Step S102: Control the rotation speed of the second air cooler 30 and the rotation speed of the induced draft fan 40 according to the first humidity and the second humidity.

[0053] Among them, the first humidity and the rotation speed of the second cooling fan 30 have a first mapping relationship, the second humidity and the rotation speed of the second cooling fan 30 have a second mapping relationship, and the second humidity and the rotation speed of the induced draft fan 40 have a third mapping relationship.

[0054] Specifically, the first humidity detector 302 detects the first humidity at the steam exhaust manifold 301 and sends the first humidity data to the controller. The second humidity detector detects the second humidity at the universal joint hole and sends the second humidity data to the controller. The controller generates a control signal based on the first and second humidity values ​​and sends the control signal to the drivers of the secondary cooling fan 30 and the induced draft fan 40, thereby controlling the rotation speed of the secondary cooling fan 30 and the induced draft fan 40. By adjusting the rotation speed of the secondary cooling fan 30, the rate at which steam is discharged from the crystallizer is regulated, and by adjusting the rotation speed of the induced draft fan 40, steam overflow at the universal joint hole is prevented. This enables intelligent adjustment of the entire anti-steam overflow system, minimizing steam overflow.

[0055] Since the first humidity and the rotation speed of the second cooling fan 30 have a first mapping relationship, the second humidity and the rotation speed of the second cooling fan 30 have a second mapping relationship, and the second humidity and the rotation speed of the induced draft fan 40 have a third mapping relationship, the rotation speeds of the second cooling fan 30 and the induced draft fan 40 can be controlled according to different humidity states.

[0056] Figure 13 This is a flowchart of another method for controlling steam overflow in a continuous casting crystallizer, provided in an embodiment of this application. Figure 13 As shown, the rotation speed of the second air cooler 30 and the rotation speed of the induced draft fan 40 are controlled according to the first humidity and the second humidity, including: In step S201, if the second humidity is less than or equal to the first preset humidity, the rotation speed of the secondary cooling fan 30 is controlled according to the first mapping relationship and the first humidity. The second humidity is the humidity at the universal joint hole. Since the first preset humidity is the minimum, that is, when the temperature at the universal joint hole is very low, only the humidity at the exhaust steam main pipe 301 needs to be monitored. Therefore, only the rotation speed of the secondary cooling fan 30 needs to be adjusted according to the first humidity and the first mapping relationship to discharge the steam in the continuous casting crystallizer through the secondary cooling fan 30. At this time, the induced draft fan 40 can draw air to the universal joint hole at a relatively low rotation speed.

[0057] Step S202: If the second humidity is greater than the first preset humidity and less than or equal to the second preset humidity, then the rotation speed of the second cooling fan 30 is controlled according to the second mapping relationship and the second humidity, wherein the second preset humidity is greater than the first preset humidity, and the rotation speed of the second cooling fan determined according to the second mapping relationship and the second humidity is greater than the rotation speed of the second cooling fan 30 determined according to the first mapping relationship and the first humidity.

[0058] For example, if the humidity value at the universal joint hole is less than 150% (the first preset humidity), the rotational speed of the secondary air cooler 30 is determined according to the humidity at the universal joint hole and the first mapping relationship. In the first mapping relationship, the rotational speed of the secondary air cooler is 35Hz-40Hz. Therefore, the rotational speed range of the secondary air cooler 30 determined by the first mapping relationship is 35 Hz - 40 Hz.

[0059] If the humidity at the universal joint hole is between 150% and 250%, the rotational speed of the secondary air cooler 30 is determined based on the humidity at the universal joint hole and the second mapping relationship. In the second mapping relationship, the rotational speed of the secondary air cooler is 40 Hz - 50 Hz. Therefore, the rotational speed range of the secondary air cooler 30 determined by the second mapping relationship is 40 Hz - 50 Hz. Thus, if the humidity at the universal joint hole exceeds 150%, a different mapping relationship can be used to increase the rotational speed of the secondary air cooler 30 to prevent steam from escaping from the universal joint hole.

[0060] In step S203, if the second humidity is greater than the second preset humidity, the speed of the second cooling fan 30 is controlled according to the second mapping relationship and the second humidity, and the operation of the induced draft fan 40 is controlled at the same time. The speed of the induced draft fan 40 is also controlled according to the third mapping relationship and the second humidity.

[0061] For example, if the humidity at the universal joint hole exceeds 250% (the second preset humidity), the humidity at the universal joint hole is very high, requiring simultaneous increases in the speed of the secondary cooling fan 30 and the induced draft fan 40. Specifically, the second mapping relationship also includes a speed range where the humidity is greater than 250%. For example, if the humidity exceeds 250%, the corresponding speed range of the secondary cooling fan 30 exceeds 50 Hz. Thus, based on the continuously increasing humidity at the universal joint hole, the speed of the secondary cooling fan 30 is further increased, ensuring that the continuously increasing steam is promptly discharged from the steam exhaust manifold 301.

[0062] Furthermore, while increasing the speed of the secondary cooling fan 30, the speed of the induced draft fan 40 is also increased based on the third mapping relationship and the second humidity, thereby further preventing steam from overflowing from the universal joint hole. In this way, through the synergistic effect of the secondary cooling fan 30 and the induced draft fan 40, steam overflow is minimized. Moreover, the steam overflow prevention control method of this application, through intelligent control by a controller, not only improves the control efficiency of steam overflow prevention, but also adjusts the speed of the secondary cooling fan 30 and the induced draft fan 40 according to different humidity levels. This timely adjustment of speed to discharge steam also saves energy and extends the service life of the equipment.

[0063] In some embodiments, the interval between each adjustment of the rotational speed of the secondary cooling fan 30 is less than a first preset time. This allows for rapid acceleration of the secondary cooling fan 30, thereby quickly improving the efficiency of steam discharge and further preventing steam overflow.

[0064] In some embodiments, the method for preventing steam overflow in the continuous casting crystallizer further includes: when a casting status signal is received from the continuous casting machine, controlling the secondary cooling fan 30 to operate at a first preset speed. That is, after receiving the casting start command, controlling the secondary cooling fan 30 to discharge steam at the first preset speed as the initial speed. In subsequent speed adjustments, the secondary cooling fan 30 is either slowed down or sped up based on the first preset speed.

[0065] Additionally, if a continuous casting machine pouring stop command is received, and a signal indicating that the humidity at the universal joint hole is less than 120% is received, it indicates that there is insufficient steam in the continuous casting mold. The controller can then send stop signals to the secondary cooling fan 30 and the induced draft fan 40, thereby stopping their operation. Furthermore, the green warning light can be controlled to flash, prompting the operator to open the sealing cover 20.

[0066] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0067] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0068] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0069] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A continuous casting crystallizer steam overflow prevention control system, characterized in that, The continuous casting crystallizer anti-steam overflow control system includes: a continuous casting crystallizer body and a sealing cover disposed on one side of the opening of the continuous casting crystallizer body, wherein the sealing cover can form a sealed space inside the continuous casting crystallizer. The sealing cap includes: The sealing cap body has at least one through hole and is provided with a magnetic element. At least one sealing plate that generates an attractive force with the magnetic element and covers the through hole at a corresponding location to seal the interior of the continuous casting crystallizer; The sealing plate includes at least one movable cover plate, which includes a first cover plate and a second cover plate. The first cover plate and the second cover plate are movable relative to each other. The first cover plate is provided with a first shaft hole, and the second cover plate is provided with a second shaft hole. When the axes of the first shaft hole and the second shaft hole coincide, the first shaft hole and the second shaft hole form a universal joint hole. The radius of the universal joint hole is larger than the radius of the universal joint, so that a universal joint can pass through. The continuous casting crystallizer anti-steam overflow control system also includes a secondary cooling fan, an induced draft fan, and a controller. The secondary cooling fan is used to discharge the steam inside the continuous casting crystallizer through the steam exhaust main pipe. The induced draft fan is connected to the movable cover plate through an induced draft pipe and is used to draw air into the universal joint hole. A first humidity detection element is installed on the main steam exhaust pipe, and a second humidity detection element is installed on the universal joint hole. The two air coolers, the induced draft fan, the first humidity detection element, and the second humidity detection element are electrically connected to the controller.

2. The continuous casting crystallizer steam overflow prevention control system according to claim 1, characterized in that, The sealing plate includes two movable cover plates, which are movable relative to each other and have a first thickness and a second thickness respectively, wherein the first thickness is greater than the second thickness; The movable cover plate having a first thickness has a mounting groove on the side facing the movable cover plate having a second thickness. The movable cover plate having the second thickness can be inserted into the mounting groove on the side facing the movable cover plate having the first thickness to connect the two movable cover plates.

3. The continuous casting crystallizer steam overflow prevention control system according to claim 1, characterized in that, The movable cover plate is provided with a horn cover on one side inside the continuous casting crystallizer. One end of the horn cover is connected to the universal joint hole, and the diameter of the horn cover gradually increases in the direction away from the universal joint hole. The horn cover is provided with several air blowing pipes, the axis of the air blowing pipes is parallel to the axis of the universal joint hole, the air inlet of the air blowing pipes is connected to the air duct, and the air outlet of the air blowing pipes faces the interior of the continuous casting crystallizer.

4. The continuous casting crystallizer steam overflow prevention control system according to claim 3, characterized in that, Several of the blower tubes are arranged in a rotating array around the axis of the cylinder of the horn cover.

5. The continuous casting crystallizer steam overflow prevention control system according to claim 3, characterized in that, The movable cover plate is also provided with an annular hose on the side outside the sealing plate, and several of the blower pipes are connected to the induced draft fan through the annular hose.

6. The continuous casting crystallizer steam overflow prevention control system according to claim 5, characterized in that, The annular hose includes a first sub-hose disposed on the first cover plate and a second sub-hose disposed on the second cover plate, wherein the first sub-hose and the second sub-hose are connected by a quick connector.

7. A method for controlling steam overflow in a continuous casting crystallizer, characterized in that, The continuous casting mold steam overflow prevention control system according to any one of claims 1 to 6, wherein the continuous casting mold steam overflow prevention control method comprises: If a casting status signal of the continuous casting machine is received, the first humidity at the exhaust steam main and the second humidity at the universal joint hole are obtained; the speed of the second cooling fan and the speed of the induced draft fan are controlled according to the first humidity and the second humidity. The first humidity and the rotational speed of the second cooling fan have a first mapping relationship, the second humidity and the rotational speed of the second cooling fan have a second mapping relationship, and the second humidity and the rotational speed of the induced draft fan have a third mapping relationship.

8. The method for preventing steam overflow in a continuous casting crystallizer according to claim 7, characterized in that, Controlling the rotation speed of the two cooling fans and the rotation speed of the induced draft fan based on the first humidity and the second humidity includes: If the second humidity is less than or equal to the first preset humidity, the rotation speed of the two cooling fans is controlled according to the first mapping relationship and the first humidity. If the second humidity is greater than the first preset humidity and less than or equal to the second preset humidity, then the rotation speed of the second air cooler is controlled according to the second mapping relationship and the second humidity, wherein the second preset humidity is greater than the first preset humidity, and the rotation speed of the second air cooler determined according to the second mapping relationship and the second humidity is greater than the rotation speed of the second air cooler determined according to the first mapping relationship and the first humidity. If the second humidity is greater than the second preset humidity, the rotation speed of the second cooling fan is controlled according to the second mapping relationship and the second humidity, and the operation of the induced draft fan is also controlled. Furthermore, the rotation speed of the induced draft fan is controlled according to the third mapping relationship and the second humidity.

9. The method for preventing steam overflow in a continuous casting crystallizer according to claim 8, characterized in that, The interval between each adjustment of the rotation speed of the two air coolers is less than the first preset time.

10. The method for preventing steam overflow in a continuous casting crystallizer according to any one of claims 7 to 9, characterized in that, The method for preventing steam overflow in the continuous casting crystallizer also includes: When a casting status signal is received from the continuous casting machine, the second cooling fan is controlled to run at a first preset speed.

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