Anti-blocking nozzle for slab continuous casting machine

Abstract

The invention provides an anti-blocking nozzle for a slab continuous casting machine, which relates to the technical field of nozzles and comprises an input filter unit, a first conveying filter unit, a back pressure conveying unit, a second conveying filter unit and an atomization spraying unit, wherein a first water path filtering part and a second water path filtering part of the input filtering unit and a third water path filtering part of the second conveying filtering unit are used for filtering external water for three times, and a first gas path filtering part of the input filtering unit and a second gas path filtering part of the first conveying filtering unit are used for filtering external gas for two times; and impurities are filtered, so that the nozzle is prevented from being blocked in the using process, the secondary cooling efficiency is ensured, and the quality of a continuous casting billet is improved.

Description

Technical Field

[0001] This application relates to the field of nozzle technology, and more particularly to an anti-clogging nozzle for a slab continuous casting machine. Background Technology

[0002] In the production process of slab continuous casting machines, the secondary cooling process plays a crucial role in the quality of the continuously cast billet. During secondary cooling, the billet is cooled by spraying water or an air-water mixture, allowing the billet with a liquid core to solidify quickly and uniformly without cracking. This process relies on the nozzle system of the slab continuous casting machine. Currently, most nozzles in domestic slab continuous casting machines are simple internal mixing long-body air-water atomizing nozzles. External water enters the nozzle cavity directly through the spray manifold, is atomized, and then sprayed out. However, during use, adhering substances that detach from the spray manifold wall and large suspended particles that precipitate can cause nozzle blockage, thus affecting the efficiency of secondary cooling and consequently the quality of the continuously cast billet.

[0003] Therefore, there is an urgent need for a nozzle with an anti-clogging design. Summary of the Invention

[0004] The purpose of this application is to address the above-mentioned problems by providing an anti-clogging nozzle for a slab continuous casting machine, thereby solving the clogging problem during nozzle use, ensuring the effect of secondary cooling, and thus improving the quality of the continuously cast slab.

[0005] This application provides an anti-clogging nozzle for a slab continuous casting machine, comprising: An input filtering unit is provided with a first space and a second space that are not interconnected, a first water filter connected to the first space, a first air filter connected to the second space, and a second water filter connected to the first space and passing through the first space and the second space in sequence. The first conveying and filtering unit has a second water filter element extending from the second space through the first conveying and filtering unit to the outside of the first conveying and filtering unit. The first conveying and filtering unit has a third space inside and a second air filter element communicating with the second space and the third space. A back pressure conveying unit, wherein the back pressure conveying unit has a fourth space communicating with the third space, and a back pressure component communicating with the second water filter component, the back pressure component being used to maintain a stable water pressure; The second conveying and filtering unit has a fifth space and a sixth space that are not connected to each other. The fifth space is connected to the back pressure member, the sixth space is connected to the fourth space, and a third water channel filter is located inside the fifth space. Atomizing spray unit, which is connected to the third water channel filter and the sixth space, is used to mix, atomize and spray the water filtered by the third water channel filter and the gas output from the sixth space. Water is filtered once by the first water path filter from the outside, then enters the first space and is filtered a second time by the second water path filter. After flowing through the back pressure component, it enters the fifth space and is filtered a third time by the third water path filter before entering the atomizing spray unit. Air is filtered once by the first air path filter from the outside, then enters the second space and is filtered a second time by the second air path filter. It then flows sequentially through the third space, the fourth space, and the sixth space before entering the atomizing spray unit. Water and air are mixed and atomized in the atomizing spray unit before being sprayed out together.

[0006] According to the technical solutions provided in some embodiments of this application, the input filtering unit includes a nozzle body, and the nozzle body is provided with a radially extending partition, which divides the interior of the nozzle body into a first space and a second space that are not interconnected. The output end of the first water filter is connected to the first space, and the output end of the first air filter is connected to the second space. Both the first water filter and the first air filter are provided with multiple filter holes for connecting to external water sources and external air sources respectively. The second water filter element passes through the first space, the partition, and the second space in sequence, and is sealed to the partition and the second space. The input end of the second water filter element is provided with a filter hole for communicating with the first space. The output end of the second water filter element passes through the first conveying and filtering unit and extends to the back pressure conveying unit, communicating with the input end of the back pressure element.

[0007] According to the technical solutions provided in certain embodiments of this application, the first delivery and filtration unit includes a first outer tube, a second air path filter is disposed inside the first outer tube, the third space is formed between the first outer tube and the second air path filter, the input end of the second air path filter is connected to the second space, and the outer wall of the second air path filter is provided with filter holes so that the gas in the second space enters the third space after being filtered by the second air path filter.

[0008] According to the technical solutions provided in certain embodiments of this application, the back pressure conveying unit includes an adjusting outer tube, and the back pressure component is disposed inside the adjusting outer tube. The adjusting outer tube and the back pressure component form the fourth space. One end of the adjusting outer tube is connected to the first conveying and filtering unit, and the other end is connected to the second conveying and filtering unit, so that the third space, the fourth space, and the sixth space are connected in sequence. The output end of the back pressure component is connected to the fifth space of the second conveying and filtering unit.

[0009] According to the technical solutions provided in certain embodiments of this application, the adjusting outer tube is made of flexible material and is used to adjust the spray angle of the anti-clogging nozzle of the slab continuous casting machine under the action of external force.

[0010] According to the technical solutions provided in certain embodiments of this application, the second conveying and filtering unit includes a second outer pipe and a first inner pipe disposed inside the second outer pipe. The third water path filter is disposed inside the first inner pipe. A fifth space is formed between the first inner pipe and the third water path filter. A sixth space is formed between the second outer pipe and the first inner pipe. The third water path filter has a plurality of filter holes so that water entering the fifth space is filtered by the third water path filter.

[0011] According to the technical solutions provided in certain embodiments of this application, the atomizing and ejecting unit includes: An atomizing mixing component, wherein the input end of the atomizing mixing component is connected to the third water path filter and the sixth space, and is used to atomize water to form a water-air mixture; The diversion atomizing component has its input end connected to the output end of the atomizing mixing component, and is used to divert and re-atomize the water-air mixture output by the atomizing mixing component; The spraying component has its input end connected to the output end of the splitting atomizing component, and is used to spray out a water-air mixture.

[0012] According to the technical solutions provided in certain embodiments of this application, the atomizing mixing component is provided with a seventh space communicating with the sixth space and an eighth space communicating with the seventh space. The seventh and eighth spaces are used for gas circulation. An atomizing vortex component, an accelerating flow component, and a mixing accelerating component are sequentially connected to the third water filter component. A gas diverting component is also connected to the seventh and eighth spaces, so that the gas circulating in the seventh space is diverted by the gas diverting component and flows through the eighth space into the mixing accelerating component to mix and atomize with water.

[0013] According to the technical solutions provided in certain embodiments of this application, the splitting atomization component includes: A mixing and diverting component is connected to the output end of the mixing and accelerating component. The mixing and diverting component is provided with multiple non-interconnected channels for diverting the water-air mixture. The self-excited oscillator has multiple non-interconnected channels that are respectively connected to multiple channels of the mixing and diverting device for circulating the water-air mixture. The edge of the self-excited oscillator is streamlined to allow the gas to be re-atomized into water after being deflected back.

[0014] According to the technical solutions provided in certain embodiments of this application, the ejection assembly includes a nozzle head, the nozzle head is connected to multiple channels of the self-excited oscillator, and the direction of the nozzle head is adjustable.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: The anti-clogging nozzle for the slab continuous casting machine forms a water channel consisting of a first water channel filter, a first space, a second water channel filter, a back pressure component, a fifth space, a third water channel filter, and an atomizing spray unit; the anti-clogging nozzle for the slab continuous casting machine forms an air channel consisting of a first air channel filter, a second space, a second air channel filter, a third space, a fourth space, a sixth space, and an atomizing spray unit. Through the three-stage filtration of external water through the first, second, and third water channel filters in the water channel, and the two-stage filtration of external air through the first and second air channel filters in the air channel, impurities are filtered, preventing nozzle clogging during use, ensuring the efficiency of secondary cooling, and thus improving the quality of the continuously cast slab.

[0016] It should be understood that the descriptions of technical features, technical solutions, beneficial effects, or similar language in this application do not imply that all features and advantages can be achieved in any single embodiment. Rather, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution, or beneficial effect is included in at least one embodiment. Therefore, the descriptions of technical features, technical solutions, or beneficial effects in this specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions, and beneficial effects described in this embodiment can be combined in any suitable manner. Those skilled in the art will understand that embodiments can be implemented without one or more specific technical features, technical solutions, or beneficial effects of a particular embodiment. In other embodiments, additional technical features and beneficial effects may be identified in specific embodiments that do not embody all embodiments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This application provides a schematic diagram of the structure of an anti-clogging nozzle for a slab continuous casting machine. Figure 2 This application provides a schematic diagram of the water flow direction for an anti-clogging nozzle used in a slab continuous casting machine. Figure 3 This application provides a schematic diagram of the gas flow direction of an anti-clogging nozzle for a slab continuous casting machine. Figure 4 This is a schematic diagram of the structure of the first water filter element provided in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the first air path filter element provided in the embodiments of this application; Figure 6 This is a schematic diagram of the structure of the input pipe of the second water filter element provided in the embodiments of this application; Figure 7 This is a schematic diagram of the structure of the water-retaining core provided in the embodiments of this application; Figure 8 This is a schematic diagram of the nozzle body provided in an embodiment of this application; Figure 9 A schematic diagram of the structure of the partition provided in the embodiments of this application; Figure 10 This is a schematic diagram of the structure of the second air path filter element provided in the embodiments of this application; Figure 11 This is a schematic diagram of the back pressure component provided in the embodiments of this application; Figure 12 This is a schematic diagram of the structure of the adjusting outer tube provided in an embodiment of this application; Figure 13 This is a schematic diagram of the structure of the third water channel filter element provided in the embodiments of this application; Figure 14 This is a schematic diagram of the structure of the atomizing swirl element provided in the embodiments of this application; Figure 15 This is a schematic diagram of the structure of the gas splitter provided in the embodiments of this application; Figure 16 This is a schematic diagram of the structure of the accelerated flow component provided in the embodiments of this application; Figure 17 This is a schematic diagram of the structure of the hybrid accelerator provided in the embodiments of this application; Figure 18 This is a schematic diagram of the structure of the hybrid flow divider provided in the embodiments of this application; Figure 19 This is a schematic diagram of the structure of the self-excited oscillator provided in the embodiments of this application; Figure 20 This is a schematic diagram of the nozzle head provided in an embodiment of this application.

[0019] The text labels in the image represent: 1. Input filtration unit; 101. First water path filter element; 102. First air path filter element; 103. Second water path filter element; 104. Nozzle body; 105. Divider; 106. Plug; 107. PTFE gasket; 108. Sealing ring; 109. First connector; 110. Second connector; 111. Water baffle core; 111. Grille seat; 1031. Input pipe; 1032. Water baffle core; 1033. Output pipe; 2. First conveying and filtering unit; 201. Second air path filter element; 202. First outer pipe; 203. Third connector; 3. Back pressure conveying unit; 301. Back pressure component; 302. Adjusting outer tube; 303. Nut; 4. Second conveying and filtering unit; 401. Third water channel filter element; 402. Second outer pipe; 403. First inner pipe; 404. Fourth connector; 5. Atomizing and ejecting unit; 501. Atomizing and mixing assembly; 502. Flow-dividing atomizing assembly; 503. Ejection assembly; 5011. Atomizing swirl component; 5012. Accelerating flow component; 5013. Mixing and accelerating component; 5014. Gas diverting component; 5015. Outer jacket; 5016. Atomizing swirl water connector; 5021. Mixing and diverting component; 5022. Self-excited oscillation component; 5023. Connector; 5031. Nozzle head; 5032. Fixing component. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The descriptions in this section are merely illustrative and explanatory, and should not be construed as limiting the scope of protection of this application. Specifically, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the scope of protection of this invention.

[0021] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0022] As mentioned in the background section, in view of the problems in the prior art, this embodiment provides an anti-clogging nozzle for a slab continuous casting machine, comprising: The input filter unit 1 has a first space and a second space that are not connected to each other, a first water filter 101 that is connected to the first space, a first air filter 102 that is connected to the second space, and a second water filter 103 that is connected to the first space and passes through the first space and the second space in sequence. The first conveying and filtering unit 2, the second water filter element 103 extends from the second space through the first conveying and filtering unit 2 to the outside of the first conveying and filtering unit 2, the first conveying and filtering unit 2 is provided with a third space inside, and a second air filter element 201 communicating with the second space and the third space; The back pressure conveying unit 3 has a fourth space inside that communicates with the third space, and a back pressure component 301 that communicates with the second water filter 103. The back pressure component 301 is used to maintain a stable water pressure. The second conveying and filtering unit 4 has a fifth space and a sixth space that are not connected to each other. The fifth space is connected to the back pressure member 301, the sixth space is connected to the fourth space, and a third water path filter 401 is located inside the fifth space. Atomizing spray unit 5, which is connected to the third water channel filter 401 and the sixth space, is used to mix, atomize and spray the water filtered by the third water channel filter 401 and the gas output from the sixth space. Water is filtered once by the first water path filter 101 from the outside, then enters the first space and is filtered a second time by the second water path filter 103. After flowing through the back pressure member 301, it enters the fifth space and is filtered a third time by the third water path filter 401 before entering the atomizing spray unit 5. Air is filtered once by the first air path filter 102 from the outside, then enters the second space and is filtered a second time by the second air path filter 201. It then flows sequentially through the third space, the fourth space, and the sixth space before entering the atomizing spray unit. Water and air are mixed and atomized in the atomizing spray unit before being sprayed out together.

[0023] For details, please refer to Figure 1 and Figure 2 and Figure 3 The input filter unit 1, the first conveying filter unit 2, the back pressure conveying unit 3, the second conveying filter unit 4, and the atomizing spray unit 5 are coaxially arranged, and all of them can be detached and connected, facilitating cleaning, inspection, and maintenance.

[0024] The input filtration unit 1 is used for the input of water and air, and for the two-stage filtration of water and the one-stage filtration of air. The input filtration unit 1 has a first space and a second space that are not interconnected to form separate water and air paths, enabling independent flow and filtration of water and air. The first water path filter 101 connects the external space to the first space. External water enters the first space after being filtered to remove large particles of impurities by the first water path filter 101. One end of the second water path filter 103 is located inside the first space. Water entering the first space is then filtered by the second water path filter 103 to remove impurities with a diameter smaller than that filtered by the first water path filter 101, and then exits the input filtration unit 1 into the first conveying filtration unit 2, achieving two-stage filtration of water. The first air path filter 102 connects the external space to the second space. External air enters the second space after being filtered to remove large particles of impurities by the first air path filter 102, and is then conveyed to the first conveying filtration unit 2, achieving one-stage filtration of air.

[0025] The first delivery and filtration unit 2 is used for secondary filtration and delivery of gas and water. The first delivery and filtration unit 2 is located on one side of the input filtration unit 1. A third space is provided inside the first delivery and filtration unit 2. The second water path filter 103 extends through the second space through the first delivery and filtration unit 2 to the outside of the first delivery and filtration unit 2 and connects to the back pressure delivery unit 3, further delivering water to the back pressure delivery unit 3. The second gas path filter 201, through communication with both the second space and the third space, performs secondary filtration on the gas output from the second space to the first delivery and filtration unit 2 and outputs it to the third space.

[0026] The back pressure conveying unit 3 is used for conveying gas and water and maintaining a stable water pressure. The back pressure conveying unit 3 is equipped with a back pressure component 301 and a fourth space communicating with the third space. The back pressure component 301 is connected to the second water filter component 103, so that the water filtered by the second water filter component 103 flows to the back pressure component 301 to maintain a stable pressure of the incoming water. The gas output from the third space flows through the fourth space and is output to the outside of the back pressure conveying unit 3.

[0027] The second conveying and filtering unit 4 is used for three-stage filtration and conveying of water, as well as for conveying air. The second conveying and filtering unit 4 has a fifth and a sixth space that are not interconnected to form separate water and air paths, allowing for independent flow of water and air. The fifth space is connected to the back pressure member 301, allowing water in the back pressure member 301 to flow into the fifth space. The third water path filter 401 is placed inside the fifth space to perform a third-stage filtration of the water in the fifth space. The sixth space is connected to the fourth space, allowing air from the fourth space to flow into the sixth space.

[0028] The atomizing spray unit 5 is used to mix and atomize water and air, and then spray them out together. The atomizing spray unit 5 is connected to the third water channel filter 401, so that the water filtered by the third water channel filter 401 flows to the atomizing spray unit 5, where it is atomized with the air and then sprayed out; the atomizing spray unit 5 is also connected to the sixth space, so that the gas in the sixth space flows to the atomizing spray unit 5, where it is mixed with the water and then atomized before being sprayed out.

[0029] This application utilizes a water channel formed by a first water channel filter, a first space, a second water channel filter, a back pressure component, a fifth space, a third water channel filter, and an atomizing spray unit in an anti-clogging nozzle for a slab continuous casting machine; and a gas channel formed by a first air channel filter, a second space, a second air channel filter, a third space, a fourth space, a sixth space, and an atomizing spray unit in an anti-clogging nozzle for a slab continuous casting machine. Through three filtrations of external water within the water channel (the first, second, and third water channel filters) and two filtrations of external air within the gas channel (the first and second air channel filters), impurities are filtered, preventing nozzle clogging during use, ensuring the efficiency of secondary cooling, and thus improving the quality of the continuously cast slab.

[0030] In a preferred embodiment, the input filter unit 1 includes a nozzle body 104, and the nozzle body 104 has a radially extending partition 105 inside, the partition 105 dividing the interior of the nozzle body 104 into a first space and a second space that are not interconnected. The output end of the first water filter 101 is connected to the first space, and the output end of the first air filter 102 is connected to the second space. Both the first water filter 101 and the first air filter 102 are provided with multiple filter holes for connecting to external water sources and external air sources respectively. The second water filter element 103 passes through the first space, the partition 105 and the second space in sequence, and the second water filter element 103 is sealed to the partition 105 and the second space. The input end of the second water filter element 103 is provided with a filter hole for communicating with the first space. The output end of the second water filter element 103 passes through the first conveying and filtering unit 2 and extends to the back pressure conveying unit 3, communicating with the input end of the back pressure element 301.

[0031] Specifically, such as Figure 1 and Figure 8 As shown, the nozzle body 104 is a hollow shell with openings at both ends along the axial direction and an internal cavity. Two through holes communicating with the internal cavity are provided on one radial side. A screw plug 106 is also installed at the opening of the nozzle body 104 away from the first conveying and filtering unit 2. The nozzle body 104 and the screw plug 106 are sealed by a PTFE gasket 107. After long-term use, the anti-clogging nozzle for the slab continuous casting machine can be manually removed by removing the screw plug 106 to facilitate the cleaning of impurity particles inside the nozzle. The nozzle body 104 and the screw plug 106 can be made of 304 stainless steel.

[0032] like Figure 1 and Figure 9As shown, the partition 105 is disposed in the internal cavity of the nozzle body 104 and can be threadedly connected to the nozzle body 104, allowing for disassembly for cleaning and maintenance of the nozzle body 104's interior, thus extending the nozzle's service life. The partition 105 has an internal hollow structure, dividing the interior of the nozzle body 104 into a first space and a second space that are not interconnected. The second water path filter 103 is disposed through the partition 105, and the second water path filter 103 is sealed to the partition 105 through a sealing ring 108. The partition 105 has multiple symmetrically arranged air passages at the other end near the second air path filter 201, allowing gas in the second space to enter the second air path filter 201 through the air passages of the partition 105. The partition 105 can be made of brass.

[0033] like Figure 1 As shown, each of the two through holes of the nozzle body 104 communicating with the internal cavity is equipped with a grid seat 111, and the two are sealed by a sealing ring 108; the first water filter element 101 and the first air filter element 102 are respectively installed on the two grid seats 111, as shown. Figure 4 and Figure 5 As shown, the first water filter 101 and the first air filter 102 are both vertical tubes with an open bottom and a semi-circular top. The bottom openings of the first water filter 101 and the first air filter 102 are respectively equipped with a first connector 109 and a second connector 110, which are used to connect to the two grid seats 111 respectively. On the one hand, water passing through the first water filter 101 enters the first space through the first connector 109, and gas passing through the first air filter 102 enters the second space through the second connector 110. On the other hand, during the transportation process, the grid seats 111 ensure that water and gas do not overflow when flowing. The grille seat 111 can be made of 304 stainless steel. The top and side walls of the first water filter 101 and the first air filter 102 have multiple filter holes, which are not limited to elliptical elongated holes, round holes, square holes, rectangular holes, polygonal holes, irregularly shaped holes, or similar filter screen structures, used to filter impurities in external water and air. The first water filter 101 and the first air filter 102 can also be made of 304 stainless steel. Furthermore, the design of the diameters of the first connector 109 and the second connector 110 is based on increasing the nozzle water flow adjustment ratio to 40 times and controlling the air-to-water mass ratio between 0.02 and 0.07. In addition, as... Figure 1 , Figure 6 and Figure 7As shown, the second water filter element 103 penetrates the partition 105. The second water filter element 103 includes an input pipe 1031, a water-blocking core 1032, and an output pipe 1033 connected together. The outer wall of the input pipe 1031 is provided with a plurality of filter holes for communicating with the first space. The filter holes are spirally distributed on the outer wall of the input pipe 1031, so that the water in the first space can be filtered again by the filter holes. The filter holes are not limited to elliptical elongated holes, round holes, square holes, rectangular holes, polygonal holes, irregular holes, or similar filter screen structures. The spirally distributed filter holes can accelerate the swirling flow of water flowing into the first space and prevent the accumulation of impurity particles. The water-blocking core 1032 is connected to the input pipe 1031 and the output pipe 1033 respectively, and is located at the connection between the second water filter element 103 and the partition 105, which can prevent water leakage at the connection between the input pipe 1031 and the output pipe 1033; the output pipe 1033 of the second water filter element 103 passes through the partition 105, passes through the first conveying and filtering unit 2, and extends to the back pressure conveying unit 3, communicating with the input end of the back pressure component 301. The input pipe 1031 and the water-blocking core 1032 of the second water filter element 103 can be made of brass, and the output pipe 1033 of the second water filter element 103 can be made of 304 stainless steel.

[0034] In a preferred embodiment, the first delivery and filtration unit 2 includes a first outer tube 202, and a second air path filter 201 is disposed inside the first outer tube 202. The third space is formed between the first outer tube 202 and the second air path filter 201. The input end of the second air path filter 201 is connected to the second space, and the outer wall of the second air path filter 201 is provided with filter holes so that the gas in the second space enters the third space after being filtered by the second air path filter 201.

[0035] Specifically, such as Figure 1 As shown, the first outer tube 202 is a straight tube with openings on both sides. One end is connected to the nozzle body 104, and the other end is connected to the back pressure conveying unit 3 via a nut 303. The first outer tube 202 can be made of 304 stainless steel. Figure 1 and Figure 10As shown, the second air path filter 201 is installed inside the first outer tube 202, forming the third space between the first outer tube 202 and the second air path filter 201. The second air path filter 201 is a hollow shell, and the output pipe of the second water path filter 103 passes through the second air path filter 201. An array of filter holes is provided on the side wall of the second air path filter 201 and at the end furthest from the input filter unit 1. The gas enters the third space after being filtered through these filter holes. The filter holes are not limited to elliptical elongated holes, round holes, square holes, rectangular holes, polygonal holes, irregularly shaped holes, or similar filter mesh structures. The second air path filter 201 can be made of brass or other high-temperature resistant materials.

[0036] The diameter design of the output pipe 1033 of the second water filter element 103 needs to comprehensively consider back pressure requirements and refined design standards, while also meeting the flow velocity specifications under minimum and maximum flow rates, as well as the requirements for laminar and turbulent flow states. In the specific design, the minimum Reynolds number of the water in the output pipe 1033 of the second water filter element 103 is set to 2300; the diameter selection of the first outer pipe 202 is based on controlling the airflow velocity in the third space to reach 60m / s; the selection of the diameter of the output pipe 1033 of the second water filter element 103 and the diameter of the first outer pipe 202 under different flow conditions must be matched and designed according to the above parameters. Furthermore, the output pipe 1033 of the second water filter element 103 and the first outer pipe 202 are inner wall bright pipes with a brightness accuracy of not less than 3.2 to reduce resistance.

[0037] like Figure 1 As shown, the third connector 203 is provided at one end of the first outer tube 202 near the back pressure conveying unit 3. The third connector 203 includes a first channel and a second channel that are not interconnected. The first channel allows the gas in the third space to flow to the fourth space. One end of the second channel is connected to the second water filter 103, and the other end is connected to the back pressure component 301, allowing the water filtered by the second water filter 103 to flow to the back pressure component 301. The third connector 203 can be made of 304 stainless steel.

[0038] In a preferred embodiment, the back pressure conveying unit 3 includes an adjusting outer tube 302, inside which the back pressure component 301 is disposed, and the fourth space is formed between the adjusting outer tube 302 and the back pressure component 301. One end of the adjusting outer tube 302 is connected to the first conveying and filtering unit 2, and the other end is connected to the second conveying and filtering unit 4, so that the third space, the fourth space, and the sixth space are sequentially connected. The output end of the back pressure component 301 is connected to the fifth space of the second conveying and filtering unit 4.

[0039] Specifically, such as Figure 1 and Figure 12 As shown, the adjusting outer tube 302 is a corrugated tube with openings on both sides. The back pressure member 301 is disposed inside the adjusting outer tube 302, forming the fourth space between the back pressure member 301 and the adjusting outer tube 302. One end of the adjusting outer tube 302 is connected to the first outer tube 202 via a nut 303, and the other end of the adjusting outer tube 302 is connected to the second conveying and filtering unit 4 via a nut 303, so that the third space, the fourth space, and the sixth space are sequentially connected, allowing the gas to flow from the third space through the fourth space and then be output to the sixth space. Figure 1 and Figure 11 As shown, the back pressure component 301 has straight pipes at both ends and a spiral pipe in the middle. Its output end is connected to the fifth space, outputting water from the back pressure component 301 to the fifth space. The design of the back pressure component 301 must be based on the minimum water pressure required for the nozzle's minimum flow rate (where the minimum water pressure is typically set to 0.07 MPa, the maximum pressure is 0.7 MPa, the pressure multiple is designed to be 10 times, and the corresponding water flow rate design range is 40 times relative to the minimum flow rate). The back pressure component 301 is used to ensure the stability of the nozzle's working pressure under the minimum flow rate condition, ensuring that atomization and spraying can be achieved at the minimum flow rate under the drag force generated by air pressure and air volume. Its structural form is determined by the water pressure requirements corresponding to the minimum and maximum flow rates, therefore, it requires targeted special design and repeated verification; the back pressure component 301 can be made of 304 stainless steel.

[0040] In a preferred embodiment, the adjusting outer tube 302 is made of a flexible material and is used to adjust the spray angle of the anti-clogging nozzle of the slab continuous casting machine under the action of external force.

[0041] Specifically, the water mist sprayed by the atomizing unit 5 is in the shape of a fan-shaped plane, such as... Figure 1 and Figure 12 As shown, the nozzle will deform due to high temperature baking during actual use. The adjusting outer tube 302 can be finely adjusted according to the required adjustment position after the actual deformation of the nozzle. During fine adjustment, the adjusting outer tube 302 can be twisted around the axis by holding the nut 303 with a wrench, which will drive the second conveying and filtering unit 4 and the atomizing spraying unit 5 to rotate synchronously, so that the spraying angle of the atomizing spraying unit 5 changes accordingly. The adjusting outer tube 302 can be made of a medium-flexibility metal material such as brass.

[0042] In a preferred embodiment, the second conveying and filtering unit 4 includes a second outer tube 402 and a first inner tube 403 disposed inside the second outer tube 402. The third water path filter element 401 is disposed inside the first inner tube 403. A fifth space is formed between the first inner tube 403 and the third water path filter element 401. A sixth space is formed between the second outer tube 402 and the first inner tube 403. The third water path filter element 401 has multiple filter holes so that water entering the fifth space is filtered by the third water path filter element 401.

[0043] Specifically, such as Figure 1 and Figure 12 As shown, the second outer pipe 402 and the first inner pipe 403 are both straight pipes open at both ends. The first inner pipe 403 is disposed inside the second outer pipe 402. The third water filter element 401 is disposed inside the first inner pipe 403. A fifth space is formed between the first inner pipe 403 and the third water filter element 401, and a sixth space is formed between the second outer pipe 402 and the first inner pipe 403. The third water filter element 401 is a hollow pipe, and an array of filters is provided on the inner wall of the third water filter element 401. The holes are used to filter the water in the input fifth space three times, and the filter holes are not limited to elliptical elongated holes, round holes, square holes, rectangular holes, polygonal holes, irregular holes or similar filter screen structures; the first inner tube 403 is provided with the fourth connector 404 at one end near the back pressure member 301, and the fourth connector is used to connect the first inner tube 403 and the back pressure member 301; the second outer tube 402, the first inner tube 403, the third water filter member 401, and the fourth connector 404 can all be made of 304 stainless steel.

[0044] In a preferred embodiment, the atomizing spraying unit 5 includes: Atomizing mixing component 501, the input end of which is connected to the third water filter 401 and the sixth space, is used to atomize water to form a water-air mixture; The diversion atomizing component 502 has its input end connected to the output end of the atomizing mixing component 501, and is used to divert and re-atomize the water vapor mixture output by the atomizing mixing component 501. The spraying component 503 has its input end connected to the output end of the splitting atomizing component 502, and is used to spray out a water-air mixture.

[0045] Specifically, such as Figure 1As shown, the input end of the atomizing mixing component 501 is connected to the third water filter 401, for allowing water filtered by the third water filter 401 to flow through and atomize it. The input end of the atomizing mixing component 501 is connected to the sixth space, for allowing water to flow through the sixth space to the atomizing mixing component 501 to form a water-air mixture with the water. The input end of the diverting atomizing component 502 is connected to the output end of the atomizing mixing component 501, allowing the water-air mixture to flow in and diverting and re-atomizing the water-air mixture. The input end of the spraying component 503 is connected to the output end of the diverting atomizing component 502, allowing the re-atomized water-air mixture to flow in and be sprayed out through the spraying component 503.

[0046] In a preferred embodiment, the atomizing mixing component 501 has a seventh space communicating with the sixth space and an eighth space communicating with the seventh space. The seventh and eighth spaces are used for gas circulation. The atomizing vortex component 5011, the accelerating flow component 5012, and the mixing accelerating component 5013 are sequentially connected to the third water filter component 401. The gas diverting component 5014 is also connected to the seventh and eighth spaces, so that the gas circulating in the seventh space is diverted by the gas diverting component 5014 and flows through the eighth space into the mixing accelerating component 5013 to mix and atomize with water.

[0047] Specifically, such as Figure 1 As shown, the atomizing mixing component 501 includes a hollow outer jacket 5015. One end of the outer jacket 5015 is connected to the third filter element 401, and the other end is connected to the flow-dividing atomizing component 502. The atomizing swirl element 5011, the accelerating flow element 5012, and the mixing accelerating element 5013 are disposed inside the outer jacket 5015. One end of the atomizing swirl element 5011 is connected to the third filter element 401, such as... Figure 1 , Figure 14 As shown, the atomizing vortex element 5011 is a straight pipe open at both ends. The input end of the atomizing vortex element 5011 is connected to the third water filter element 401, and the connection between the two is sealed with a sealing ring 108. The output end of the atomizing vortex element 5011 is equipped with an atomizing vortex water connector 5016. The atomizing vortex water connector 5016 has a curved pipe inside, which allows water to generate atomization and vortex even at the lowest flow rate. Its atomization angle and vortex direction need to be optimized in combination with the flow rate requirements and atomization angle. A gas splitter 5014 is installed outside the output end of the atomizing vortex element 5011; as Figure 1 and Figure 15 As shown, the other end of the gas splitter 5014 is connected to a mixing accelerator 5013, such as... Figure 17As shown, the mixing accelerator 5013 is hourglass-shaped with a channel in the middle, the width of which is smaller than the width of the sides; the gas splitter 5014 is hollow inside, and the accelerating flow element 5012 is installed inside, with the accelerating flow element 5012 positioned between the atomizing swirl element 5011 and the mixing accelerator 5013, as shown. Figure 16 As shown, the outer wall of the accelerating flow element 5012 is a multi-tapered Laval streamline surface, and the end of the accelerating flow element 5012 away from the atomizing swirl element 5011 has an opening. The atomizing swirl element 5011 and the outer casing 5015 can both be made of 304 stainless steel, while the accelerating flow element 5012, the mixing accelerating element 5013, the gas splitter 5014, and the atomizing swirl water connector 5016 can be made of brass. Figure 1 , Figure 14 and Figure 15 As shown, the seventh space is formed between the atomizing swirl member 5011, the gas splitting member 5014 and the outer jacket 5015, and the eighth space is formed between the gas splitting member 5014, the accelerating flow member 5012 and the mixing acceleration member 5013. The side wall of the gas splitting member 5014 is provided with an opening for connecting the seventh space and the eighth space.

[0048] Gas flows from the sixth space to the seventh space of the atomizing mixing assembly 501, and is accelerated through the opening of the gas splitter 5014 and the outer wall of the accelerating flow member 5012 before entering the eighth space; water flows from the third water path filter 401 through the atomizing vortex member 5011 into the atomizing vortex water connector 5016, where it is swirled and atomized, and then outputs through the opening inside the accelerating flow member 5012 to the eighth space; outside the accelerating flow member 5012... The gas accelerated by the wall mixes with the water in the eighth space at a specific incident angle, and performs secondary atomization on the water to form a water-gas mixture (the gas can atomize water particles to about 100um, and the accelerated gas has an ejection effect on the minimum water flow rate. When the water flow rate is at the set minimum value, the water can be ejected and atomized; when the water flow rate is at the set maximum value, the water can be sheared and atomized). The water-gas mixture flows from the eighth space through the middle channel of the mixing acceleration component 5013 and is accelerated before being output to the diversion atomization component 502.

[0049] In a preferred embodiment, the splitting atomizing component 502 includes: A mixing and diverting component 5021 is connected to the output end of the mixing and accelerating component 5013. The mixing and diverting component 5021 is provided with multiple non-interconnected channels for diverting the water-air mixture. The self-excited oscillator 5022 has multiple non-interconnected channels that are respectively connected to multiple channels of the mixing and diverting component 5021 for circulating the water-air mixture. The edge of the self-excited oscillator 5022 is streamlined to allow the gas to be re-atomized into water after being deflected back.

[0050] Specifically, such as Figure 1 As shown, the flow splitting atomizing component 502 includes a hollow connecting body 5023. One end of the connecting body 5023 is connected to the gas splitting component 5014, and the other end is connected to the ejection component 503. The mixing splitting component 5021 and the self-excited oscillating component 5022 are disposed inside the connecting body 5023. One end of the mixing splitting component 5021 is connected to the mixing acceleration component 5013, and the other end is connected to the self-excited oscillating component 5022.

[0051] like Figure 1 and Figure 18 As shown, one end of the mixing and diverting component 5021 is connected to the output end of the mixing and accelerating component 5013. The mixing and diverting component 5021 has multiple non-interconnected channels, which are symmetrically distributed circumferentially. The water-air mixture passing through the mixing and accelerating component 5013 enters the mixing and diverting component 5021 through these channels. The mixing and diverting component 5021 can stabilize the ratio of liquid to gas phase in the water-air mixture, and the symmetrically distributed channels allow the water-air mixture to diffuse and distribute uniformly in the circumferential direction, ensuring proper subsequent injection.

[0052] like Figure 1 and Figure 19 As shown, the self-excited oscillator 5022 has multiple non-interconnected channels that are respectively connected to multiple channels of the mixing and diverting component 5021, and the edge of the self-excited oscillator 5022 is streamlined. The gas velocity is faster than the atomized water velocity. Gas in the water-gas mixture passing through the mixing and diverting component 5021 travels to the streamlined edge of the self-excited oscillator 5022 and then turns back, causing the water and gas to self-excite and atomize, further enhancing the atomization of the water-gas mixture, stabilizing the mixture, and preventing it from re-aggregating.

[0053] Both the mixing and diverting component 5021 and the self-excited oscillating component 5022 can be made of brass, while the connecting body 5023 can be made of 304 stainless steel.

[0054] In a preferred embodiment, the ejection assembly 503 includes a nozzle head 5031, which is connected to multiple channels of the self-excited oscillator 5022, and the direction of the nozzle head 5031 is adjustable.

[0055] Specifically, such as Figure 1 and Figure 20 As shown, the water-air mixture passing through the self-excited oscillator 5022 enters the nozzle head 5031 through the channel and is ejected through the nozzle head 5031 in a planar fan shape. The nozzle head 5031 is connected to the connector 5023 by a fixing member 5032 via a threaded clamping method. By locking and sealing the connection between the nozzle head 5031 and the connector 5023, the nozzle head 5031 is guaranteed not to leak under pressure. The nozzle head 5031 adopts an adjustable universal ball head, which is convenient for on-site adjustment according to the actual direction. The nozzle head 5031 is processed in multiple dimensions to meet the requirements of the internal cavity joint angle and water flow distribution, ensuring the nozzle's spray width, spray angle, nozzle flow water distribution, and spray impact force distribution. In addition, the nozzle head 5031 adopts an anti-adhesion coating design to avoid external covering of the nozzle head 5031. The nozzle head 5031 can be made of brass.

[0056] The anti-clogging nozzle for slab continuous casting machine provided in this application forms a water channel through a first water channel filter, a first space, a second water channel filter, a back pressure component, a fifth space, a third water channel filter, and an atomizing spray unit; and forms an air channel through a first air channel filter, a second space, a second air channel filter, a third space, a fourth space, a sixth space, and an atomizing spray unit. The external water undergoes three filtrations in the water channel—first, second, and third water channel filters—while the external air undergoes two filtrations in the air channel—first and second air channel filters—ensuring impurities are filtered out, preventing nozzle clogging during use, and guaranteeing the efficiency of secondary cooling, thereby improving the quality of the continuously cast billet. The nozzle employs a back pressure component to ensure stable water supply, maintaining a stable water flow even at low flow rates. The nozzle's atomizing swirl water connector, accelerating flow component, and self-excited oscillator design enable multiple atomizations without additional gas supply, achieving good atomization effects with minimal air consumption, thus possessing an air-saving function. Furthermore, the self-excited oscillator further enhances the atomization of the water-air mixture, stabilizing it and preventing re-aggregation. The adjustable outer tube and nozzle head allow for easy adjustment of the spray direction, ensuring accurate spray angles.

[0057] To facilitate understanding by those skilled in the art, the working process of the anti-clogging nozzle for the slab continuous casting machine provided in this application is as follows: External water enters the first space of the nozzle body 104 after being filtered through the filter holes of the first water path filter element 101 in the input filter unit 1. The water in the first space undergoes secondary filtration through the filter holes at the input end of the second water path filter element 103, then passes through the partition 105, the second space (which is sealed to the partition 105 and the second space), and the interior of the first conveying filter unit 2, entering the back pressure element 301 of the back pressure conveying unit 3. After adjusting the spray angle through the flexible adjustment outer pipe 302, the back pressure element 301 maintains stable water pressure and conveys the water to the fifth space of the second conveying filter unit 4. The water undergoes tertiary filtration through the third water path filter element 401 in the first inner pipe 403. The filtered water enters the atomizing mixing assembly 501 of the atomizing spray unit 5 and is initially atomized in the atomizing swirl element 5011, flowing through the accelerating flow element 5012. The gas enters the mixing and accelerating component 5013. The external air source enters the second space through the first air path filter 102 of the input filter unit 1 to complete the first filtration. The gas in the second space is filtered a second time through the filter holes on the outer wall of the second air path filter 201 and then enters the third space. It flows sequentially through the fourth space between the adjusting outer pipe 302 and the back pressure component 301, the sixth space between the second outer pipe 402 and the first inner pipe 403, and finally enters the seventh space of the atomizing mixing component 501. It is then diverted to the eighth space by the gas diverter 5014 and flows into the mixing and accelerating component 5013 from the eighth space. The water vapor enters the mixing and accelerating component 5013 to complete the mixing and re-atomization, forming a water vapor mixture. The water vapor mixture enters the mixing and diverting component 5021 of the diverting atomizing component 502 and is divided into multiple paths. Each path is re-atomized by the excess gas of the self-excited oscillator 5022 along the streamlined edge. Finally, the water vapor mixture is sprayed out by the directional adjustable nozzle head 5031.

[0058] The anti-clogging nozzle for slab continuous casting machine provided in this application forms a water channel through a first water channel filter, a first space, a second water channel filter, a back pressure component, a fifth space, a third water channel filter, and an atomizing spray unit; and forms an air channel through a first air channel filter, a second space, a second air channel filter, a third space, a fourth space, a sixth space, and an atomizing spray unit. The external water undergoes three filtrations in the water channel—first, second, and third water channel filters—while the external air undergoes two filtrations in the air channel—first and second air channel filters—ensuring impurities are filtered out, preventing nozzle clogging during use, and guaranteeing the efficiency of secondary cooling, thereby improving the quality of the continuously cast billet. The nozzle employs a back pressure component to ensure stable water supply, maintaining a stable water flow even at low flow rates. The nozzle's atomizing swirl water connector, accelerating flow component, and self-excited oscillator design enable multiple atomizations without additional gas supply, achieving good atomization effects with minimal air consumption, thus possessing an air-saving function. Furthermore, the self-excited oscillator further enhances the atomization of the water-air mixture, stabilizing it and preventing re-aggregation. The adjustable outer tube and nozzle head allow for easy adjustment of the spray direction, ensuring accurate spray angles.

[0059] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. An anti-clogging nozzle for a slab continuous casting machine, characterized in that, include: The input filter unit (1) has a first space and a second space that are not connected to each other, a first water filter (101) connected to the first space, a first air filter (102) connected to the second space, and a second water filter (103) connected to the first space and passing through the first space and the second space in sequence. The first conveying and filtering unit (2) has a second water filter element (103) extending from the second space through the first conveying and filtering unit (2) to the outside of the first conveying and filtering unit (2). The first conveying and filtering unit (2) has a third space inside and a second air filter element (201) communicating with the second space and the third space. Back pressure conveying unit (3), the back pressure conveying unit (3) is provided with a fourth space communicating with the third space, and a back pressure component (301) communicating with the second water filter (103), the back pressure component (301) is used to maintain the stable pressure of water; The second conveying and filtering unit (4) has a fifth space and a sixth space that are not connected to each other. The fifth space is connected to the back pressure member (301), the sixth space is connected to the fourth space, and a third water path filter (401) is located inside the fifth space. Atomizing spray unit (5) is connected to the third water filter (401) and the sixth space, and is used to mix, atomize and spray out the water filtered by the third water filter (401) and the gas output from the sixth space. Water is filtered once by the first water path filter (101) from the outside, then enters the first space and is filtered a second time by the second water path filter (103). After flowing through the back pressure member (301), it enters the fifth space and is filtered a third time by the third water path filter (401) before entering the atomizing spray unit (5). Air is filtered once by the first air path filter (102) from the outside, then enters the second space and is filtered a second time by the second air path filter (201). After flowing through the third space, the fourth space, and the sixth space in sequence, it enters the atomizing spray unit. Water and air are mixed and atomized in the atomizing unit and then sprayed out together.

2. The anti-clogging nozzle for a slab continuous casting machine according to claim 1, characterized in that, The input filter unit (1) includes a nozzle body (104), and the nozzle body (104) has a radially extending partition (105) inside, which divides the interior of the nozzle body (104) into a first space and a second space that are not connected to each other. The output end of the first water filter (101) is connected to the first space, and the output end of the first air filter (102) is connected to the second space. Both the first water filter (101) and the first air filter (102) are provided with multiple filter holes for connecting to external water sources and external air sources respectively. The second water filter element (103) passes through the first space, the partition (105) and the second space in sequence, and the second water filter element (103) is sealed to the partition (105) and the second space. The input end of the second water filter element (103) is provided with a filter hole for communicating with the first space. The output end of the second water filter element (103) passes through the first conveying filter unit (2) and extends to the back pressure conveying unit (3) and communicates with the input end of the back pressure element (301).

3. The anti-clogging nozzle for a slab continuous casting machine according to claim 1, characterized in that, The first delivery and filtration unit (2) includes a first outer tube (202), and a second air path filter (201) is provided inside the first outer tube (202). The third space is formed between the first outer tube (202) and the second air path filter (201). The input end of the second air path filter (201) is connected to the second space, and the outer wall of the second air path filter (201) is provided with filter holes so that the gas in the second space enters the third space after being filtered by the second air path filter (201).

4. The anti-clogging nozzle for a slab continuous casting machine according to claim 1, characterized in that, The back pressure conveying unit (3) includes an adjusting outer tube (302), and the back pressure component (301) is disposed inside the adjusting outer tube (302). The fourth space is formed between the adjusting outer tube (302) and the back pressure component (301). One end of the adjusting outer tube (302) is connected to the first conveying and filtering unit (2), and the other end is connected to the second conveying and filtering unit (4), so that the third space, the fourth space, and the sixth space are connected in sequence. The output end of the back pressure component (301) is connected to the fifth space of the second conveying and filtering unit (4).

5. The anti-clogging nozzle for a slab continuous casting machine according to claim 4, characterized in that, The adjusting outer tube (302) is made of flexible material and is used to adjust the spray angle of the anti-clogging nozzle of the slab continuous casting machine under the action of external force.

6. The anti-clogging nozzle for a slab continuous casting machine according to claim 1, characterized in that, The second conveying and filtering unit (4) includes a second outer tube (402) and a first inner tube (403) disposed inside the second outer tube (402). The third water path filter element (401) is disposed inside the first inner tube (403). A fifth space is formed between the first inner tube (403) and the third water path filter element (401). A sixth space is formed between the second outer tube (402) and the first inner tube (403). The third water path filter element (401) has multiple filter holes so that the water entering the fifth space is filtered by the third water path filter element (401).

7. The anti-clogging nozzle for a slab continuous casting machine according to claim 1, characterized in that, The atomizing and ejecting unit (5) includes: Atomizing mixing component (501), the input end of which is connected to the third water filter (401) and the sixth space, is used to atomize water to form a water-air mixture; The diversion atomizing component (502) has its input end connected to the output end of the atomizing mixing component (501) and is used to divert and re-atomize the water vapor mixture output by the atomizing mixing component (501). The spray assembly (503) has its input end connected to the output end of the split atomizing assembly (502) and is used to spray out a water-air mixture.

8. The anti-clogging nozzle for a slab continuous casting machine according to claim 7, characterized in that, The atomizing mixing component (501) has a seventh space connected to the sixth space and an eighth space connected to the seventh space. The seventh and eighth spaces are used for gas circulation. The atomizing vortex component (5011), the accelerating flow component (5012), and the mixing accelerating component (5013) are connected in sequence to the third water filter component (401). The gas diverting component (5014) is connected to the seventh space and the eighth space, so that the gas circulating in the seventh space is diverted by the gas diverting component (5014) and flows through the eighth space into the mixing accelerating component (5013) to mix and atomize with water.

9. The anti-clogging nozzle for a slab continuous casting machine according to claim 8, characterized in that, The split-flow atomizing component (502) includes: A mixing and diverting component (5021) is connected to the output end of the mixing and accelerating component (5013). The mixing and diverting component (5021) is provided with multiple non-interconnected channels for diverting the water-air mixture. The self-excited oscillator (5022) has multiple non-interconnected channels that are respectively connected to multiple channels of the mixing and diverting device (5021) for circulating the water-air mixture. The edge of the self-excited oscillator (5022) is streamlined to allow the gas to be re-atomized into water after being deflected back.

10. The anti-clogging nozzle for a slab continuous casting machine according to claim 9, characterized in that, The ejection assembly (503) includes a nozzle head (5031), which is connected to multiple channels of the self-excited oscillator (5022), and the direction of the nozzle head (5031) is adjustable.

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