Variable-flow submersed nozzle based on continuous cast steel production

Abstract

The invention discloses a variable-flow submersed nozzle based on continuous cast steel production, and relates to the technical field of submersed nozzles, the variable-flow submersed nozzle comprises a base, the top surface of the base is provided with a flow control mechanism used for controlling the flow of cast steel liquid, and the top surface of the base is provided with an auxiliary flow mechanism used for assisting the flow of the liquid steel; the flow control mechanism can be blocked in the submersed nozzle, so that the flowing space of molten steel in the nozzle is reduced, the flow of the molten steel is controlled, a stop block is relatively simple to use, a complex flow control system and related equipment are not needed, the complexity and cost of the system are reduced, potential fault points are reduced, and the service life of the system is prolonged. The auxiliary flowing mechanism can knock the isolation plate, impurities attached to the isolation plate can be shaken off by knocking the isolation plate, the cleaning effect is achieved, blockage of a water gap can be reduced by cleaning the blocked isolation net, the fluidity of molten metal is improved, and therefore the production efficiency is improved, and the rejection rate can be reduced and the product quality can be improved by cleaning the blocked isolation net.

Description

Technical Field

[0001] The invention relates to the technical field of submerged nozzles, and in particular to a submerged nozzle with a variable flow rate based on continuous steel casting production. Background Art

[0002] The immersed nozzle in cast steel production is a key component in the continuous casting process. It is mainly used to transport the molten steel in the tundish to the crystallizer to form a cast billet. The immersed nozzle is a device used in continuous casting. It is directly inserted into the middle of the molten steel and transports the molten steel to the crystallizer through the nozzle. This nozzle is usually designed to be partially or completely immersed in the molten steel to control the flow of the molten steel.

[0003] In the prior art, most of the flow control systems are controlled by a control panel to adjust the flow of the submerged water nozzles in continuous steel casting production. The introduction of the flow control system will increase the complexity of the entire production system and require more equipment, sensors and control elements. The installation and maintenance of the flow control system require additional cost investment. More equipment and elements mean an increase in potential failure points, which will lead to system failures and production interruptions. The control system has a certain response time delay, which will affect the timely adjustment of flow changes. If the control system is unstable or errors occur, it will cause flow fluctuations and affect the quality of the casting. The complex system requires professional technicians to maintain and debug, which increases labor costs and technical requirements. Operators need to be familiar with and master the operation and monitoring of the flow control system, which improves the skill requirements for operators.

[0004] During the steel casting process, slag, iron slag, sand and other particulate matter in the molten metal will move with the water flow. When the water flow slows down or stagnates, these particulate matter will be deposited at the isolation net of the sprue and gradually form a blockage. During the steel casting process, the molten metal comes into contact with the sprue material and produces iron oxide scale, which will block the sprue. Sprue blockage will cause poor flow of molten steel, affecting the continuity of the casting process and thus reducing production efficiency. Sprue blockage will cause uneven flow of molten steel, thus affecting the quality of the ingot, such as the appearance of defects such as cracks and inclusions. Severe sprue blockage will damage the sprue itself and even affect the normal operation of the entire casting equipment. Sprue blockage will cause molten steel to overflow, increasing the safety risk of operators. Sprue blockage will lead to a decline in the quality of the ingot, further affecting the performance and quality of the final product.

[0005] Therefore, a variable flow submerged nozzle based on continuous steel casting production is proposed to solve the above problems. Summary of the invention

[0006] In view of this, the technical problem to be solved by the present invention is to propose a variable flow submerged nozzle based on continuous steel casting production to solve the problems that the flow control system in the prior art will increase the complexity of the entire production system, require more equipment, sensors and control elements, the installation and maintenance of the flow control system requires additional cost investment, and the blockage of the nozzle will cause the molten steel to flow poorly, affecting the continuity of the casting process and thus reducing production efficiency.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a variable flow immersion nozzle based on continuous steel casting production, comprising: a base, the top surface of which is provided with a flow control mechanism for controlling the flow of molten steel cast, and the top surface of which is provided with an auxiliary flow mechanism for assisting the flow of molten steel;

[0008] The flow control mechanism comprises a first auxiliary frame, wherein a first cylinder for controlling flow is rotatably connected to the top of the first auxiliary frame;

[0009] The auxiliary flow mechanism comprises a storage box, and a second auxiliary frame for supporting and isolating impurities is fixedly connected to the top surface of the storage box.

[0010] Preferably, the flow control mechanism also includes a first cylinder, the first auxiliary frame is fixedly connected to the top surface of the base, the first cylinder is fixedly connected to the side surface of the first auxiliary frame, the side of the first auxiliary frame away from the first cylinder is fixedly connected to the second cylinder, the end of the second cylinder away from the first cylinder is slidably connected to the telescopic cylinder, and the end of the telescopic cylinder away from the second cylinder is fixedly connected to the third cylinder.

[0011] Preferably, a ball valve is rotatably connected inside the first cylinder, a handle is fixedly connected to the arc surface of the ball valve, an arc groove is provided on the outer surface of the first cylinder, and a first push block is fixedly connected to one end of the first cylinder close to the first auxiliary frame.

[0012] Preferably, a first push plate is slidably connected to the interior of the first auxiliary frame, a first return spring is fixedly connected to the top surface of the first push plate, and one end of the first return spring away from the first push plate is fixedly connected to the first auxiliary frame.

[0013] Preferably, the auxiliary flow mechanism also includes a fourth cylinder, the storage box is slidably connected to the top surface of the base, the interior of the second auxiliary frame is fixedly connected with a baffle, the interior of the second auxiliary frame is slidably connected with a second push plate, and the second push plate is located on the side of the baffle close to the third cylinder.

[0014] Preferably, a first support plate is fixedly connected to the inside of the top of the second auxiliary frame, a second support plate is fixedly connected to the bottom of the first support plate, a rotating column is rotatably connected to the side of the second support plate away from the first support plate, and a second push block is fixedly connected to the outer surface of the rotating column.

[0015] Preferably, a side of the first support plate away from the second support plate is fixedly connected to a second auxiliary plate, a side of the second support plate close to the second push block is rotatably connected to the first auxiliary plate, a telescopic rod is rotatably connected between the first auxiliary plate and the second auxiliary plate, a second return spring is fixedly connected to the outer surface of the telescopic rod, a knocking column is fixedly connected to the bottom end of the first auxiliary plate, and a side of the first auxiliary plate close to the rotating column is fixedly connected to a wedge block.

[0016] Preferably, the telescopic cylinder is slidably connected to the arc groove formed by the auxiliary cylinder and the first cylinder.

[0017] Compared with the prior art, the present invention provides a submerged nozzle with a variable flow rate based on continuous steel casting production, which has the following beneficial effects:

[0018] 1. By cooperating with each other among the first cylinder, the first push block, the first return spring and the first push plate in the flow control mechanism, the flow space of the molten steel inside the immersion nozzle can be reduced to control the flow of the molten steel. The use of the blocking block is relatively simple, and no complex flow control system and related equipment are required, which reduces the complexity and cost of the system and reduces potential failure points. The blocking block can directly affect the flow of the molten steel and has a faster response speed. In contrast, the flow control system has a certain response time delay. No additional flow control equipment and sensors are required, which reduces investment and maintenance costs and avoids the additional complexity brought by the flow control system, such as electrical connection, signal transmission, etc. This helps to simplify system design and maintenance.

[0019] 2. By controlling the cooperation between the second cylinder, the telescopic cylinder and the third cylinder in the flow control mechanism, the length of the submerged nozzle can be extended. Reducing the flow space can more effectively control the flow of the molten steel, making the flow more stable and precise. Extending the submerged nozzle can increase the residence time of the molten steel in the nozzle, further improving the accuracy of flow control. Reducing the flow space can change the flow pattern of the molten steel in the nozzle, reduce the formation of turbulence and vortexes, and thus improve the flow characteristics of the molten steel, which helps to improve the quality of the ingot and reduce the occurrence of defects. Flow control and improved flow characteristics of molten steel help to improve the quality of the ingot and reduce the occurrence of surface defects, internal cracks and other problems, which is very important for the production of high-quality steel products.

[0020] 3. Through the cooperation between the rotating column, the second push block, the first auxiliary plate, the second auxiliary plate, the telescopic rod, the second reset spring and the knocking column in the auxiliary flow mechanism, the isolation plate can be knocked. Knocking the isolation plate can shake off the impurities adhering to it, thereby achieving a cleaning effect. Cleaning the blocked isolation net can reduce the blockage of the water outlet and improve the fluidity of the molten metal, thereby improving production efficiency. The blocked isolation net will cause the flow of the molten metal to be unstable, thereby affecting the quality of the product and increasing the scrap rate. By cleaning the blocked isolation net, the scrap rate can be reduced and the quality of the product can be improved. The blocked isolation net will increase the pressure of the water outlet, thereby accelerating the wear and aging of the equipment. By cleaning the blocked isolation net, the pressure of the water outlet can be reduced and the service life of the equipment can be extended. By cleaning the blocked isolation net, the scrap rate and the maintenance cost of the equipment can be reduced, thereby reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional side view of the overall structure of the present invention;

[0022] Figure 2 It is a structural schematic diagram of another angle of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the first cylinder of the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the first auxiliary frame of the present invention;

[0025] Figure 5 This is a schematic diagram of the auxiliary flow mechanism structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of the second auxiliary frame of the present invention;

[0027] Figure 7 This is a schematic diagram of the connection relationship structure of the first support plate of the present invention;

[0028] Figure 8 It is a schematic diagram of the connection relationship structure of the rotating column of the present invention.

[0029] In the figure:

[0030] 1. Base;

[0031] Flow control mechanism: 201, first auxiliary frame; 202, first cylinder; 203, second cylinder; 204, telescopic cylinder; 205, third cylinder; 206, ball valve; 207, handle; 208, first cylinder; 209, first push block; 210, first return spring; 211, first push plate;

[0032] Auxiliary flow mechanism: 301, storage box; 302, second auxiliary frame; 303, fourth cylinder; 304, baffle; 305, second push plate; 306, first support plate; 307, second support plate; 308, rotating column; 309, second push block; 310, first auxiliary plate; 311, second auxiliary plate; 312, telescopic rod; 313, second return spring; 314, knocking column. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0035] Example

[0036] Please refer to Figures 1 to 4 As shown:

[0037] In order to solve the problems mentioned in the technical solution, the embodiment of the present application provides a variable flow immersion nozzle based on continuous steel casting production, comprising: a base 1, a flow control mechanism for controlling the flow of molten steel cast steel is provided on the top surface of the base 1, and an auxiliary flow mechanism for assisting the flow of molten steel is provided on the top surface of the base 1;

[0038] The flow control mechanism comprises a first auxiliary frame 201, and a first cylinder 208 for controlling the flow is rotatably connected to the top of the first auxiliary frame 201;

[0039] The flow control mechanism also includes a first cylinder 202, a first auxiliary frame 201 fixedly connected to the top surface of the base 1, the first cylinder 202 is fixedly connected to the side of the first auxiliary frame 201, a side of the first auxiliary frame 201 away from the first cylinder 202 is fixedly connected to the second cylinder 203, an end of the second cylinder 203 away from the first cylinder 202 is slidably connected to the telescopic cylinder 204, and an end of the telescopic cylinder 204 away from the second cylinder 203 is fixedly connected to the third cylinder 205.

[0040] The first cylinder 202 is rotatably connected to a ball valve 206 , a handle 207 is fixedly connected to the arc surface of the ball valve 206 , an arc groove is provided on the outer surface of the first cylinder 208 , and a first push block 209 is fixedly connected to one end of the first cylinder 208 close to the first auxiliary frame 201 .

[0041] A first push plate 211 is slidably connected inside the first auxiliary frame 201 , a first return spring 210 is fixedly connected to the top surface of the first push plate 211 , and one end of the first return spring 210 away from the first push plate 211 is fixedly connected to the first auxiliary frame 201 .

[0042] The telescopic cylinder 204 is at a moderate length and the flow is normal. An arc groove is provided on the outer surface of the first cylinder 208, which is mainly used to control the extension and retraction of the telescopic cylinder 204. A hole is provided in the spherical valve 206 in a transverse direction.

[0043] In the prior art, most of the flow control systems are controlled by control panels to adjust the flow of submerged nozzles in continuous steel casting production. The introduction of a flow control system will increase the complexity of the entire production system and require more equipment, sensors and control components. The installation and maintenance of the flow control system requires additional cost investment. More equipment and components mean an increase in potential failure points, which will lead to system failures and production interruptions. The control system has a certain response time delay, which will affect the timely adjustment of flow changes. If the control system is unstable or errors occur, it will cause flow fluctuations and affect the quality of the ingot. The complex system requires professional technicians to maintain and debug, which increases labor costs and technical requirements. Compared with the prior art, the control system can be operated by a flow control mechanism. The first cylinder 208, the first push block 209, the first return spring 210 and the first push plate 211 cooperate with each other to block the inside of the immersed nozzle, thereby reducing the flow space of the molten steel inside the nozzle and controlling the flow of the molten steel. The use of the blocking block is relatively simple and does not require a complex flow control system and related equipment, which reduces the complexity and cost of the system and reduces potential failure points. The blocking block can directly affect the flow of the molten steel and has a faster response speed. In comparison, the flow control system has a certain response time delay and does not require additional flow control equipment and sensors, which reduces investment and maintenance costs and avoids the additional complexity brought by the flow control system, such as electrical connection, signal transmission, etc., which helps to simplify system design and maintenance.

[0044] For further examples, please refer to Figures 4 to 8 As shown:

[0045] The auxiliary flow mechanism includes a storage box 301, and a second auxiliary frame 302 for supporting and isolating impurities is fixedly connected to the top surface of the storage box 301;

[0046] The auxiliary flow mechanism also includes a fourth cylinder 303, the storage box 301 is slidably connected to the top surface of the base 1, the interior of the second auxiliary frame 302 is fixedly connected with a baffle 304, the interior of the second auxiliary frame 302 is slidably connected with a second push plate 305, and the second push plate 305 is located on the side of the baffle 304 close to the third cylinder 205.

[0047] A first support plate 306 is fixedly connected to the inside of the top of the second auxiliary frame 302, a second support plate 307 is fixedly connected to the bottom of the first support plate 306, a rotating column 308 is rotatably connected to the side of the second support plate 307 away from the first support plate 306, and a second push block 309 is fixedly connected to the outer surface of the rotating column 308.

[0048] A second auxiliary plate 311 is fixedly connected to one side of the first support plate 306 away from the second support plate 307, a first auxiliary plate 310 is rotatably connected to one side of the second support plate 307 close to the second push block 309, a telescopic rod 312 is rotatably connected between the first auxiliary plate 310 and the second auxiliary plate 311, a second return spring 313 is fixedly connected to the outer surface of the telescopic rod 312, a knocking column 314 is fixedly connected to the bottom end of the first auxiliary plate 310, and a wedge block is fixedly connected to one side of the first auxiliary plate 310 close to the rotating column 308.

[0049] Among them: a hard bristle brush is provided at the bottom end of the second push plate 305, and is pushed up and down by the cylinder, an opening is provided on the top surface of the storage box 301, and is blocked by the baffle 304. When the cylinder is started, the baffle 304 shrinks, and a wedge block is fixedly connected to a side of the first auxiliary plate 310 close to the rotating column 308, and the wedge block is on the movement path of the second push block 309, and the two will contact, the motor drives the second push plate 305 to move up and down, and the driving device drives the rotating column 308 to rotate.

[0050] In the prior art, during the steel casting process, slag, iron slag, sand and other particulate matter in the molten metal will move with the water flow. When the water flow speed slows down or stagnates, these particulate matter will settle at the isolation net of the sprue and gradually form a blockage. The blockage of the sprue will cause the molten steel to flow poorly, affecting the continuity of the casting process, thereby reducing production efficiency. The blockage of the sprue will cause uneven flow of molten steel, thereby affecting the quality of the ingot, such as defects such as cracks and inclusions. Severe blockage of the sprue will damage the sprue itself and even affect the normal operation of the entire casting equipment. The blockage of the sprue will cause molten steel to overflow, increasing the safety risk of the operators. The blockage of the sprue will lead to a decrease in the quality of the ingot, further affecting the performance and quality of the final product. Compared with the prior art, the rotating column 308, the second push block 309 and the first auxiliary flow mechanism are used to auxiliary the flow mechanism. The plate 310, the second auxiliary plate 311, the telescopic rod 312, the second return spring 313 and the knocking column 314 cooperate with each other to knock on the isolation plate. Knocking on the isolation plate can shake off the impurities adhering to it, thereby achieving a cleaning effect. Cleaning the blocked isolation net can reduce the blockage of the water outlet and improve the fluidity of the molten metal, thereby improving production efficiency. The blocked isolation net will cause the flow of the molten metal to be unstable, thereby affecting the quality of the product and increasing the scrap rate. By cleaning the blocked isolation net, the scrap rate can be reduced and the quality of the product can be improved. The blocked isolation net will increase the pressure of the water outlet, thereby accelerating the wear and aging of the equipment. By cleaning the blocked isolation net, the pressure of the water outlet can be reduced and the service life of the equipment can be extended. By cleaning the blocked isolation net, the scrap rate and the maintenance cost of the equipment can be reduced, thereby reducing the production cost.

[0051] Everything in the above example works like this:

[0052] In the initial state: the first push plate 211 is located above a surface of the second cylinder 203 close to the first auxiliary frame 201 .

[0053] The following is the working process of the telescopic immersed water pipe of the flow control mechanism:

[0054] When in use, when the flow rate of molten steel needs to be adjusted manually, the motor drives the first cylinder 208 to rotate. Since the outer surface of the first cylinder 208 is provided with an arc groove, and the telescopic cylinder 204 is slidably connected to the groove, when the first cylinder 208 rotates, the telescopic cylinder 204 is controlled to extend and retract, and the rotation of the first cylinder 208 drives the first push block 209 fixedly connected thereto to rotate. The rotation of the first push block 209 can push the first push plate 211 to move downward, thereby blocking the inside of the submerged nozzle, reducing the flow space of the molten steel inside the nozzle, and controlling the flow rate of the molten steel. The use of the first push plate 211 is relatively simple, and does not require a complex flow control system and related equipment, which reduces the complexity and cost of the system and reduces potential failure points. The first push plate 211 can directly affect the flow rate of the molten steel and has a faster response speed. In comparison, the flow control system has a certain response time delay, does not require additional flow control equipment and sensors, reduces investment and maintenance costs, and avoids the additional complexity brought by the flow control system, such as electrical connection, signal transmission, etc., which helps to simplify system design and maintenance;

[0055] When the first push plate 211 blocks the inside of the submerged water nozzle, the telescopic cylinder 204 can be controlled to extend, thereby extending the length of the submerged water nozzle, and then reducing the flow space can more effectively control the flow of molten steel, making the flow more stable and precise. Extending the submerged water nozzle can increase the residence time of the molten steel in the water nozzle, further improving the accuracy of flow control, and reducing the flow space can change the flow pattern of the molten steel in the water nozzle, reduce the formation of turbulence and vortexes, and thus improve the flow characteristics of the molten steel. This is because in a smaller flow space, the flow velocity of the molten steel will increase, thereby reducing the residence time of the molten steel in the water nozzle, which helps to reduce the formation of inclusions and bubbles in the molten steel, thereby improving the quality of the molten steel, and also helps to improve the quality of the ingot and reduce the occurrence of defects. Flow control and improved flow characteristics of the molten steel help to improve the quality of the ingot and reduce the occurrence of surface defects, internal cracks and other problems, which is very important for the production of high-quality steel products.

[0056] Please refer to the above working process Figures 1 to 4 .

[0057] The following is the working process of the auxiliary flow mechanism to remove impurities on the isolation plate:

[0058] During use, since, during the steel casting process, slag, iron slag, sand and other particulate matter in the molten metal will move with the water flow, after the immersion nozzle has been used for a long time, these particulate matter will be deposited at the isolation net of the nozzle, gradually forming a blockage, and then causing the nozzle to be blocked, which will cause the molten steel to flow poorly, affecting the continuity of the casting process, thereby reducing production efficiency. When it is necessary to clean the isolation net, the handle 207 is manually turned, thereby driving the ball valve 206 fixedly connected thereto to rotate, and the rotation of the ball valve 206 can block the molten steel, and then the motor drives the second push plate 305 to move up and down, and The driving device drives the rotating column 308 to rotate. Since a hard brush is provided on the bottom surface of the second push plate 305, the second push plate 305 can move up and down to scrape off the impurities adhering to the baffle 304, and while scraping off the impurities adhering to the baffle 304, the rotating column 308 rotates, that is, while the rotating column 308 rotates, the second push block 309 fixedly connected thereto is driven to rotate, and a wedge block is fixedly connected to a side of the first auxiliary plate 310 close to the rotating column 308, and the wedge block is on the movement path of the second push block 309, and the two will contact, that is, while the second push block 309 rotates, it will push the wedge block When the second push block 309 no longer pushes the wedge-shaped block to move in the direction away from the rotating column 308, the second return spring 313 is no longer squeezed and immediately returns to its original state, pushing the first auxiliary plate 310 to move in the direction close to the rotating column 308. As a result, when the first auxiliary plate 310 reciprocates, it drives the knocking column 314 fixedly connected thereto to knock on the baffle 304, so that impurities adhering to the baffle 304 are knocked and vibrated. Falling, cleaning the blocked isolation net can reduce the blockage of the water outlet, improve the fluidity of the molten metal, and thus improve the production efficiency. The blocked isolation net will cause the flow of the molten metal to be unstable, thus affecting the quality of the product and increasing the scrap rate. By cleaning the blocked isolation net, the scrap rate can be reduced and the quality of the product can be improved. The blocked isolation net will increase the pressure of the water outlet, thereby accelerating the wear and aging of the equipment. By cleaning the blocked isolation net, the pressure of the water outlet can be reduced and the service life of the equipment can be extended. By cleaning the blocked isolation net, the scrap rate and equipment maintenance costs can be reduced, thereby reducing production costs.

[0059] Please refer to the above working process Figures 5 to 8 .

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable flow submerged nozzle based on continuous steel casting production, comprising: The base (1) is characterized in that a flow control mechanism for controlling the flow of molten steel is provided on the top surface of the base (1), and an auxiliary flow mechanism for assisting the flow of molten steel is provided on the top surface of the base (1); The flow control mechanism comprises a first auxiliary frame (201), and a first cylinder (208) for controlling flow is rotatably connected to and penetrates the top of the first auxiliary frame (201); The auxiliary flow mechanism comprises a storage box (301), and a second auxiliary frame (302) for supporting and isolating impurities is fixedly connected to the top surface of the storage box (301).

2. The variable flow submerged nozzle based on continuous steel casting production according to claim 1, characterized in that: The flow control mechanism also includes a first cylinder (202), the first auxiliary frame (201) is fixedly connected to the top surface of the base (1), the first cylinder (202) is fixedly connected to the side surface of the first auxiliary frame (201), a side of the first auxiliary frame (201) away from the first cylinder (202) is fixedly connected to the second cylinder (203), an end of the second cylinder (203) away from the first cylinder (202) is slidably connected to a telescopic cylinder (204), and an end of the telescopic cylinder (204) away from the second cylinder (203) is fixedly connected to a third cylinder (205).

3. The variable flow submerged nozzle based on continuous steel casting production according to claim 2, characterized in that: A spherical valve (206) is rotatably connected inside the first cylinder (202), a handle (207) is fixedly connected to the arc surface of the spherical valve (206), an arc groove is provided on the outer surface of the first cylinder (208), and a first push block (209) is fixedly connected to one end of the first cylinder (208) close to the first auxiliary frame (201).

4. The variable flow submerged nozzle based on continuous steel casting production according to claim 3, characterized in that: The first auxiliary frame (201) is slidably connected to a first push plate (211) inside, a first return spring (210) is fixedly connected to the top surface of the first push plate (211), and one end of the first return spring (210) away from the first push plate (211) is fixedly connected to the first auxiliary frame (201).

5. The variable flow submerged nozzle based on continuous steel casting production according to claim 4, characterized in that: The auxiliary flow mechanism also includes a fourth cylinder (303), the storage box (301) is slidably connected to the top surface of the base (1), the interior of the second auxiliary frame (302) is fixedly connected with a baffle (304), the interior of the second auxiliary frame (302) is slidably connected with a second push plate (305), and the second push plate (305) is located on a side of the baffle (304) close to the third cylinder (205).

6. The variable flow submerged nozzle based on continuous steel casting production according to claim 5, characterized in that: A first support plate (306) is fixedly connected to the inside of the top of the second auxiliary frame (302), a second support plate (307) is fixedly connected to the bottom of the first support plate (306), a rotating column (308) is rotatably connected to the side of the second support plate (307) away from the first support plate (306), and a second push block (309) is fixedly connected to the outer surface of the rotating column (308).

7. The variable flow submerged nozzle based on continuous steel casting production according to claim 6, characterized in that: A second auxiliary plate (311) is fixedly connected to a side of the first supporting plate (306) away from the second supporting plate (307); a side of the second supporting plate (307) close to the second pushing block (309) is rotatably connected to the first auxiliary plate (310); a telescopic rod (312) is rotatably connected between the first auxiliary plate (310) and the second auxiliary plate (311); a second return spring (313) is fixedly connected to the outer surface of the telescopic rod (312); a knocking column (314) is fixedly connected to the bottom end of the first auxiliary plate (310); and a wedge block is fixedly connected to a side of the first auxiliary plate (310) close to the rotating column (308).

8. The variable flow submerged nozzle based on continuous steel casting production according to claim 2, characterized in that: The telescopic cylinder (204) is slidably connected to the arc groove formed by the auxiliary cylinder and the first cylinder (208).

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