A breathable element and a jetting pipeline assembly

Abstract

This application provides a venting element and a jetting pipeline assembly, relating to the field of metal smelting technology. The venting element includes: a venting brick with vent holes, the first end of which connects to the interior of a ladle; and a leak-proof part including a base and a cover plate. The base is embedded in the bottom end of the venting brick and has a venting channel. The cover plate is hinged to the base and is used to open or cover one end of the venting channel. The conduction direction of the second end of the vent holes intersects with the cover plate, and the cover plate is arranged between the second end of the vent holes and the venting channel along the conduction direction of the second end. When the cover plate opens one end of the venting channel, the venting channel is connected to the vent holes. The venting element provided by this application can reduce the risk of large-scale leakage of molten steel, which is beneficial to improving the safety and stability of the production process and providing a guarantee for the continuous and stable operation of production.

Description

Technical Field

[0001] This application relates to the field of metal smelting technology, and in particular to a permeable element and a jetting pipeline assembly. Background Technology

[0002] Bottom-blowing argon and powder injection processes in steel ladles typically involve supplying argon or refining powder into the ladle via venting elements installed at the bottom. However, due to the large volume of molten steel contained in large-sized ladles, the required gas pressure and refining powder dosage are correspondingly higher. Consequently, the aforementioned venting elements often need to have large-diameter vents, which can easily lead to leakage of molten steel through these vents during production, hindering safe and stable production. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0004] In view of this, a breathable element is provided according to a first aspect of the embodiments of this application, comprising:

[0005] The permeable brick has ventilation holes, and the first end of the ventilation hole is used to connect to the inside of the steel ladle.

[0006] The leak-proof part includes a base and a cover plate. The base is embedded in the bottom end of the breathable brick and has an air passage. The cover plate is hinged to the base and is used to open or cover one end of the air passage. The conduction direction of the second hole end of the vent intersects the cover plate. Along the conduction direction of the second hole end, the cover plate is arranged between the second hole end and the air passage.

[0007] In this case, with one end of the cover plate open for ventilation, the ventilation channel is connected to the vent.

[0008] In one feasible implementation, the leak-proof part further includes:

[0009] The pivot is rotatably mounted on the base;

[0010] A connecting rod connects the pivot and the cover plate;

[0011] A limiting element is provided on the base. The limiting element is used to cooperate with the connecting rod to limit the rotation of the cover plate away from the air passage.

[0012] In one feasible implementation, the air passage includes a hexagonal hole section and an air passage section, which are connected. The end of the air passage section away from the hexagonal hole section is used to connect to the vent through a mounting groove. The outer peripheral wall of the base has an external thread. The bottom end of the ventilated brick is provided with a mounting groove that communicates with the second hole end. The inner peripheral wall of the mounting groove has an internal thread that matches the external thread. The base is threadedly connected to the mounting groove, and the external thread is coaxially arranged with the hexagonal hole section.

[0013] In one feasible implementation, the air passage further includes a threaded hole section that connects the hexagonal hole section and the air passage section.

[0014] In one feasible implementation, the vent hole includes a first hole segment, a second hole segment, and a third hole segment. The second hole segment connects the first hole segment and the third hole segment. The end of the first hole segment away from the second hole segment connects to the mounting groove. The end of the third hole segment away from the second hole segment is used to connect to the interior of the ladle.

[0015] In particular, along the height direction of the permeable brick, at least part of the third hole section is at a lower position than the second hole section.

[0016] A second aspect of the embodiments of this application provides a jetting pipeline assembly, comprising:

[0017] As described in any of the first aspects above, the breathable element;

[0018] The gas supply pipe has a first port and a second port. The first port is connected to the gas passage, and the second port is used to connect to the output end of the argon blowing device and / or the output end of the powder spraying device.

[0019] In one feasible implementation, the jet piping assembly further includes:

[0020] A pneumatic three-way valve has a first input port, a second input port, an output port, a first control air inlet and a second control air inlet, and the output port is connected to the second pipe port;

[0021] The first delivery pipe has a third port and a fourth port. The third port is connected to the first input port, and the fourth port is used to connect to the output end of the argon blowing device. The first control gas inlet is connected to the first delivery pipe.

[0022] The second conveying pipe has a fifth port and a sixth port. The fifth port is connected to the second input port, and the sixth port is used to connect to the output end of the powder spraying device. The second control air inlet is connected to the second conveying pipe.

[0023] The pneumatic three-way valve is configured to open the first input port and the output port when the input gas pressure at the first control gas inlet is greater than or equal to the input gas pressure at the second control gas inlet; and to open the second input port and the output port when the input gas pressure at the second control gas inlet is greater than the input gas pressure at the first control gas inlet.

[0024] In one feasible implementation, the jet piping assembly further includes:

[0025] The first control air tube has one end connected to the first control air inlet;

[0026] The second control air tube includes a first tube segment and a second tube segment. One end of the first tube segment passes through the wall of the second delivery tube and connects to the interior of the second delivery tube. One end of the second tube segment connects to the second control air inlet.

[0027] The first pressure regulating valve and the first delivery pipe include a third pipe section and a fourth pipe section. One end of the third pipe section has a third port, and one end of the fourth pipe section has a fourth port. The first pressure regulating valve is connected between the other end of the third pipe section and the other end of the fourth pipe section. The other end of the first control air pipe passes through the pipe wall of the third pipe section and is connected to the interior of the third pipe section.

[0028] The second pressure regulating valve is connected between the other end of the first pipe section and the other end of the second pipe section. The output pressure of the second pressure regulating valve is greater than the output pressure of the first pressure regulating valve.

[0029] In one feasible implementation, the jet piping assembly further includes:

[0030] The first gas storage tank is connected in series between the fourth pipeline section and the first pressure regulating valve;

[0031] The second gas storage tank is connected in series between the first pipeline section and the second pressure regulating valve;

[0032] A one-way valve is connected in series between the first pipe section and the second gas storage tank. The one-way valve allows unidirectional flow in the direction from the first pipe section to the second gas storage tank.

[0033] In one feasible implementation, the second control airway includes a U-shaped section connected in series between the one-way valve and the first section.

[0034] The above description is merely an overview of the technical solution provided in this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other features and effects of this application more obvious and easy to understand, the following are specific examples of the implementation methods of this application. Attached Figure Description

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of exemplary embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0036] Figure 1 A schematic structural diagram of a breathable element according to an embodiment of this application;

[0037] Figure 2 A schematic structural diagram of the leak-proof part in the first state according to an embodiment of this application;

[0038] Figure 3 for Figure 2 The diagram shows a schematic cross-sectional view of the leak-proof section along the AA direction.

[0039] Figure 4 A schematic cross-sectional view of the leak-proof part in a second state according to an embodiment of this application;

[0040] Figure 5 A schematic connection diagram of the cover plate and the rotating shaft according to one embodiment of this application;

[0041] Figure 6 A schematic structural diagram of a limiting member according to an embodiment of this application;

[0042] Figure 7 A schematic structural diagram of a jetting pipeline assembly according to an embodiment of this application;

[0043] Figure 8 A schematic partial enlarged view of a jet piping assembly according to an embodiment of this application.

[0044] in, Figures 1 to 8 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0045] 10. Purge piping assembly; 20. Steel ladle;

[0046] 100. Breathable element; 110. Breathable brick; 120. Leak-proof part; 121. Base; 122. Cover plate; 123. Rotating shaft; 124. Connecting rod; 125. Limiting element; 126. Fastening screw;

[0047] 200, Air supply pipe; 300a, Pneumatic three-way valve; 310a, Control unit; 320a, Valve body; 300b, First delivery pipe; 310b, Third pipe section; 320b, Fourth pipe section; 300c, Second delivery pipe; 400a, First control air pipe; 400b, Second control air pipe; 410b, U-shaped pipe section; 420b, First pipe section; 430b, Second pipe section; 500a, First pressure regulating valve; 500b, Second pressure regulating valve; 600a, First air storage tank; 600b, Second air storage tank; 700, Check valve; 800a, Pressure relief pipe; 800b, Needle valve; 900, Third pressure regulating valve;

[0048] 1101, Vent hole; 1101a, First hole section; 1101b, Second hole section; 1101c, Third hole section; 1102, Mounting groove;

[0049] 1211, Air passage; 1211a, Hexagonal hole section; 1211b, Air passage section; 1211c, Threaded hole section; 1212, First receiving groove; 1213, Second receiving groove;

[0050] 301b, fourth port; 301c, sixth port. Detailed Implementation

[0051] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0052] It should be noted that while the bottom-blowing argon process in steel ladle can homogenize the temperature and composition of molten steel and promote the flotation and removal of inclusions, its effectiveness in removing harmful impurities is relatively limited. The ladle powder injection process utilizes a carrier gas, such as argon, to inject refining powder into the ladle. This process leverages the agitation effect of the carrier gas on the molten steel, increasing the contact area between the refining powder and the molten steel, and improving the kinetics of the physicochemical reactions in the metallurgical process. This allows for the rapid removal of harmful impurities, improving alloy yield and metal cleanliness, and ultimately enhancing steel quality. Therefore, in practical applications, the ladle powder injection process is often combined with the bottom-blowing argon process to form an external refining process. This external refining process retains the original effects of both the bottom-blowing argon and ladle powder injection processes while further shortening refining time and saving energy and raw materials.

[0053] Bottom-blowing argon and powder injection processes in steel ladles typically involve supplying argon or refining powder into the ladle via venting elements installed at the bottom. However, due to the large volume of molten steel contained in large-sized ladles, the required gas pressure and refining powder dosage are correspondingly higher. Furthermore, ladle refining usually requires powder injection to be completed within a short time. Consequently, the aforementioned venting elements often need to have large-diameter vents, which can easily lead to leakage of molten steel through these vents during production, hindering safe and stable production.

[0054] In view of this, such as Figures 1 to 8As shown, a first aspect of the present application provides a breathable element 100, comprising: a breathable brick 110 having a breathable hole 1101, the first end of the breathable hole 1101 being used to communicate with the interior of a ladle 20; and a leak-proof part 120 including a base 121 and a cover plate 122, the base 121 being embedded in the bottom end of the breathable brick 110 and having an air passage 1211, the cover plate 122 being hinged to the base 121 and used to open or cover one end of the air passage 1211, the conduction direction of the second end of the breathable hole 1101 intersecting the cover plate 122, and the cover plate 122 being arranged between the second end of the second end and the air passage 1211 along the conduction direction of the second end; wherein, when the cover plate 122 opens one end of the air passage 1211, the air passage 1211 is connected to the breathable hole 1101.

[0055] The ventilated element 100 provided in this embodiment includes the aforementioned ventilated brick 110 and the aforementioned leak-proof part 120. The ventilated brick 110 has vent holes 1101. In practical applications, the ventilated brick 110 can be installed at the bottom of the ladle 20, and the first end of the vent hole 1101 can communicate with the interior of the ladle 20. The leak-proof part 120 includes the aforementioned base 121 and the aforementioned cover plate 122. The base 121 is embedded at the bottom end of the ventilated brick 110, and the cover plate 122 is hinged to the base 121. The cover plate 122 is adapted to open or cover one end of the air passage 1211 on the base 121 by rotating relative to the base 121, so that the air passage 1211 and the vent hole 1101 are respectively connected or blocked. In practical applications, the gas passage 1211 can be used to connect argon gas output from the argon blowing device and / or carrier gas and refining powder output from the powder injection device. When the gas passage 1211 is connected to the aforementioned gas, the gas can apply pressure to the cover plate 122 to cause the cover plate 122 to open one end of the gas passage 1211. Thus, when the cover plate 122 opens one end of the gas passage 1211, the aforementioned gas flows out of the gas passage 1211 and then flows to the vent hole 1101, and can further flow into the ladle 20 through the vent hole 1101 to facilitate the implementation of the aforementioned ladle refining process; the aforementioned cover plate 122 along the vent hole 11 The guiding direction of 01 is arranged between the second end of the vent 1101 and the venting channel 1211, and the guiding direction of the cover plate 122 intersects with that of the vent 1101. Thus, if molten steel in the ladle 20 leaks through the aforementioned vent 1101, the cover plate 122 can block and intercept the molten steel flowing from the second end to the venting channel 1211, preventing the molten steel from flowing into the venting channel 1211 and further leaking outwards. Correspondingly, the side of the cover plate 122 near the second end can be used to trap molten steel, and the molten steel trapped on the cover plate 122 can exert pressure on the cover plate 122. In cases where a large amount of molten steel is trapped on the cover plate 122... The pressure exerted by the molten steel on the cover plate 122 can cause the cover plate 122 to overcome the pressure of the aforementioned gas and rotate in the direction of covering one end of the gas passage 1211 until the cover plate 122 covers one end of the aforementioned gas passage 1211, thereby more reliably blocking the leakage of molten steel. Based on this, the venting element 100 can reduce the risk of a large amount of molten steel leakage, which is conducive to improving the safety and stability of the production process and providing a guarantee for the continuous and stable operation of production. This facilitates the enlargement of the aperture of the aforementioned venting hole 1101 to improve the argon blowing efficiency and powder injection efficiency, and helps to shorten the powder injection time during ladle refining.

[0056] It should be noted that, Figure 3 The double-headed arc segment R is used to schematically indicate the rotation direction of the cover plate 122; Figure 2 and Figure 3The diagram schematically shows the state of the cover plate 122 when one end of the air passage 1211 is open; Figure 4 The diagram schematically shows the state when the cover plate 122 covers one end of the air passage 1211.

[0057] It is understood that, based on the aforementioned configuration, the cover plate 122 can rotate relative to the base 121 within a certain angle range. The aforementioned angle range includes multiple angle positions, including a first angle position and a second angle position. When the cover plate 122 is in the first angle position, it can cover one end of the aforementioned air passage 1211. When the cover plate 122 is in the second angle position, it can open one end of the aforementioned air passage 1211. Correspondingly, the conduction direction of the second end of the aforementioned vent 1101 intersects the cover plate 122, meaning that when the cover plate 122 is located at any angle within the aforementioned angle range, the conduction direction of the second end of the vent 1101 can pass through the cover plate 122. In practical applications, the setting of the conduction direction of the second end of the aforementioned vent 1101 intersecting the cover plate 122 can be achieved based on the design of the structural parameters of the vent element 100. The aforementioned structural parameters include, but are not limited to, the structural dimensions of the cover plate 122, the structural dimensions of the vent 1101, the aforementioned angle range, and the relative positional dimensions of the cover plate 122 and the vent 1101. The specific structural parameters of the aforementioned vent element 100 can be set according to actual needs, and are not limited here.

[0058] Understandably, in practical applications, the cover plate 122 can be arranged corresponding to the end of the air passage 1211 near the vent hole 1101 to open or cover the end of the air passage 1211 near the vent hole 1101. Correspondingly, if the end of the air passage 1211 near the vent hole 1101 is the air outlet end of the air passage 1211, the cover plate 122 can be flipped relative to the side of the base 121 where the aforementioned air outlet end is formed to open or cover the aforementioned air outlet end.

[0059] It is understood that the aforementioned first hole end and the aforementioned second hole end are the two ends in the axial direction of the vent hole 1101, and the conduction direction of the aforementioned second hole end refers to the extension direction of the axis of the vent hole 1101 at the aforementioned second hole end.

[0060] It is understood that the conduction direction of the aforementioned second hole end and the conduction direction of the aforementioned air passage 1211 corresponding to one end of the aforementioned cover plate 122 are both separate from the rotation axis of the cover plate 122, thereby facilitating the rotation of the cover plate 122 under the action of gas pressure in the air passage 1211 or the action of molten steel flowing out of the second hole end, so as to open or cover one end of the air passage 1211.

[0061] It is understood that both the aforementioned breathable brick 110 and the aforementioned leak-proof part 120 can be made of heat-resistant materials, which helps the breathable element 100 adapt to high-temperature environments, reduces the risk of damage to the breathable element 100, and extends the service life of the breathable element 100. For example, the aforementioned heat-resistant material can be, but is not limited to, any one of 310S heat-resistant stainless steel, corundum, magnesium oxide, graphite, and tungsten.

[0062] It is understandable that, such as Figure 1 As shown, in practical applications, the aforementioned gas passage 1211 can be connected to the gas supply pipe 200, and the aforementioned gas supply pipe 200 can be connected to the output end of the aforementioned argon blowing device and / or the output end of the powder spraying device, so that the gas passage 1211 can be connected to the argon gas output by the argon blowing device and / or the carrier gas and refining powder output by the powder spraying device. For example, the aforementioned gas supply pipe 200 may have a first port and a second port, wherein the first port is connected to the aforementioned gas passage 1211; the number of the aforementioned second ports may be two, and the two second ports are respectively connected to the output end of the argon blowing device and the output end of the powder spraying device, that is, the aforementioned gas supply pipe 200 may be a three-way pipe, so that when at least one of the powder spraying device and the argon blowing device is running, the gas passage 1211 may be connected to the argon gas output by the argon blowing device and / or the carrier gas and refining powder output by the powder spraying device. The on / off state of the aforementioned two second ports may be controlled by two independently operable shut-off valves, so that the on / off state between the argon blowing device and the corresponding second port, and the on / off state between the powder spraying device and the corresponding second port may be independently controllable, so as to realize that the gas supply pipe 200 is connected to the output end of the aforementioned argon blowing device and / or the output end of the powder spraying device; or, the number of the aforementioned second ports may be one, and the second port may be connected to the output valve port of the three-way valve, the aforementioned three-way valve having two Two input valve ports are respectively connected to the output end of the argon blowing device and the output end of the powder spraying device. The aforementioned three-way valve has a first working state and a second working state. In the first working state, the connection between the input valve port and the output valve port of the argon blowing device is open, and the connection between the input valve port and the output valve port of the powder spraying device is closed. In the second working state, the connection between the input valve port and the output valve port of the argon blowing device is closed, and the connection between the input valve port and the output valve port of the powder spraying device is open. Thus, by switching the working state of the aforementioned three-way valve, the gas passage 1211 can be connected to the output end of the argon blowing device or the output end of the powder spraying device. It can be understood that during the process of switching the working state of the aforementioned three-way valve, both of the aforementioned output valve ports can be open, so that during this process, the gas supply pipe 200 can be simultaneously connected to the output end of the argon blowing device or the output end of the powder spraying device. The aforementioned three-way valve can be, but is not limited to, a manual three-way valve, an electric three-way valve, or a pneumatic three-way valve 300a.

[0063] For example, the aforementioned permeable brick 110 can be frustum-shaped, with its two ends in the axial direction being the bottom and top of the permeable brick 110, respectively. The area of ​​the top of the permeable brick 110 is smaller than the area of ​​the bottom. The first hole can be formed at the top of the permeable brick 110, and the permeable hole 1101 extends towards the bottom of the permeable brick 110. The conduction direction of the second hole can coincide with the axial direction of the permeable brick 110, thereby improving the force balance of the permeable brick 110 when the argon gas and / or carrier gas are connected via the second hole, and thus enhancing the installation stability of the permeable brick 110 on the ladle 20. In practical applications, the permeable brick 110 can be inserted through the bottom of the ladle 20. The base 121 is fixed with a fixing plate. The aforementioned base 121 can be cylindrical, and the aforementioned air passage 1211 can pass through the base 121 along its axial direction. The base 121 can be embedded in the bottom end of the air-permeable brick 110, and the base 121 can be coaxial with the air-permeable brick 110. This improves the positional correspondence between the air passage 1211 and the second hole end, facilitating the flow of gas in the air passage 1211 to the air hole 1101. On the other hand, it further enhances the structural stability of the air-permeable element 100 and facilitates the connection of the air passage 1211 to the pipeline. In practical applications, the gap between the base 121 and the air-permeable brick 110 can be coated with high-temperature resistant adhesive to ensure the airtightness of the air-permeable element 100. The two surfaces of the cover plate 122 in the thickness direction and one end of the base 121 in the axial direction can all be parallel to the rotation axis of the cover plate 122. This facilitates the flipping of the cover plate 122 relative to the axial end of the base 121, and allows for the use of both sides of the cover plate 122 in the thickness direction to respectively block and intercept molten steel and cover the venting channel 1211. The cover plate 122 can be arranged corresponding to the top of the base 121, so that the cover plate 122 is positioned between the second hole end and the venting channel 1211. This allows the cover plate 122 to receive the molten steel dripping from the second hole end, and facilitates the rotation of the cover plate 122 towards the end covering the venting channel 1211 under the pressure and gravity of the molten steel, until the venting channel 1211 is covered. Covering one end; if the angle position of the cover plate 122 covering one end of the air passage 1211 is 0°, the angle range of the cover plate 122 relative to the base 121 can be set to be greater than or equal to 0° and less than 90°, thereby avoiding the cover plate 122 forming a posture parallel to the conduction direction of the second hole end, which is conducive to ensuring the shielding and interception effect of the cover plate 122 on the molten steel, and facilitates the cover plate 122 to form a tendency to rotate in the direction of covering one end of the air passage 1211 under the action of gravity. In this way, when the gas is stopped entering the air passage 1211, the cover plate 122 can automatically cut off the air passage 1211, preventing the molten steel from flowing into the air passage 1211 and leaking out through the air passage 1211.

[0064] In some feasible examples, the diameter of the aforementioned base 121 can be greater than or equal to 20 mm and less than or equal to 50 mm, and the axial length of the base 121 can be greater than or equal to 60 mm and less than or equal to 100 mm; the thickness of the cover plate 122 can be greater than or equal to 2 mm and less than or equal to 10 mm, thereby avoiding the cover plate 122 being too thin, enhancing the heat resistance of the cover plate 122, helping to prevent the cover plate 122 from being scalded by molten steel, ensuring the structural reliability of the cover plate 122, and avoiding the cover plate 122 being too thick, preventing the cover plate 122 from being too heavy, so that when argon and / or carrier gas are introduced into the gas passage 1211, the aforementioned gas can drive the cover plate 122 to flip, thereby opening one end of the aforementioned gas passage 1211.

[0065] In some feasible examples, the diameter of the aforementioned second hole end is greater than or equal to 6 mm and less than or equal to 10 mm.

[0066] like Figures 2 to 6 As shown, in some examples, the leak-proof part 120 further includes: a rotating shaft 123 rotatably disposed on the base 121; a connecting rod 124 connected between the rotating shaft 123 and the cover plate 122; and a limiting member 125 disposed on the base 121, the limiting member 125 being used to limit the rotation of the cover plate 122 away from the air passage 121.

[0067] In this technical solution, the leak-proof part 120 may further include the aforementioned rotating shaft 123, the aforementioned connecting rod 124, and the aforementioned limiting member 125. Based on the aforementioned configuration, the cover plate 122 can be hinged to the aforementioned base 121 via the connecting rod 124 and the rotating shaft 123, thereby facilitating the cover plate 122 to open or cover one end of the aforementioned air passage 1211 by rotating relative to the base 121, and allowing a certain gap to be formed between the cover plate 122 and the rotating shaft 123, so that the conduction direction of the second hole end and the conduction direction of the air passage 1211 deviate from the rotation axis of the cover plate 122, thereby facilitating the rotation of the cover plate 122 under the action of gas pressure in the air passage 1211 or the action of molten steel flowing out of the second hole end; the aforementioned limiting member 125 25 can be engaged with the aforementioned connecting rod 124 for limiting. When the limiting member 125 and the connecting rod 124 form a limiting engagement, the limiting member 125 can restrict the rotation of the cover plate 122 in the direction away from the air passage 1211, so as to avoid the cover plate 122 opening too wide. This helps to ensure the blocking effect of the cover plate 122 between the air passage 1211 and the second hole end, and provides a guarantee for the cover plate 122 to stably and reliably block and intercept molten steel. In addition, the limiting member 125 can cooperate with the base 121 to limit the rotation angle range of the cover plate 122, which helps to improve the movement reliability of the cover plate 122.

[0068] For example, the top of the base 121 may have a first receiving groove 1212 and a second receiving groove 1213, the first receiving groove 1212 and the second receiving groove 1213 are connected, and the air outlet of the air passage 1211 is formed at the bottom of the first receiving groove 1212; the aforementioned limiting member 125 may be a plate-shaped structure, the limiting member 125 is disposed in the second receiving groove 1213 and is arranged corresponding to the opening of the second receiving groove 1213, the aforementioned rotating shaft 123 is rotatably disposed in the aforementioned second receiving groove 1213 and is located between the aforementioned limiting member 125 and the bottom of the second receiving groove 1213; the cover plate 122 may be used to open or cover the air outlet of the air passage 1211, when the cover plate 122 covers the air outlet of the air passage 1211, the cover plate 122 is located in the first receiving groove 1212. Within 212, and at least a portion thereof, the connecting rod 124 is located within the second receiving groove 1213. As the cover plate 122 rotates away from the air passage 1211, the connecting rod 124 can rotate synchronously with the cover plate 122 and gradually approach the aforementioned limiting member 125. When the connecting rod 124 abuts against the aforementioned limiting member 125, a limiting engagement is formed between the connecting rod 124 and the limiting member 125. Correspondingly, the limiting member 125 can apply resistance to the rotation of the connecting rod 124 to limit the cover plate 122 from further rotating away from the air passage 1211. Based on the aforementioned arrangement, the base 121 can utilize the aforementioned first receiving groove 1212 and second receiving groove 1213 to accommodate the aforementioned cover plate 122, connecting rod 124, and limiting member 125, thereby improving the structural compactness of the leak-proof part 120.

[0069] It is understood that the periphery of the cover plate 122 and the inner peripheral wall of the first receiving groove 1212 can be clearance-fitted, thereby facilitating the cover plate 122 to enter or exit the second receiving groove 1213 during rotation, reducing the probability of structural interference between the cover plate 122 and the base 121, and helping to reduce the risk of the cover plate 122 getting stuck. For example, when the cover plate 122 covers the air outlet of the air passage 1211, the cover plate 122 can be a circular plate, the first receiving groove 1212 can be a cylindrical groove, and a gap greater than or equal to 1 mm and less than or equal to 2 mm is formed between the periphery of the cover plate 122 and the inner peripheral wall of the first receiving groove 1212. The diameter of the first receiving groove 1212 can be, but is not limited to, 14 mm.

[0070] It is understandable that, such as Figure 3 and Figure 4As shown, if the angle position of the cover plate 122 covering one end of the air passage 1211 is 0°, the angle of the cover plate 122 when the connecting rod 124 abuts against the limiting member 125 can be set to be less than 90°. Based on this, the rotation angle range of the cover plate 122 relative to the base 121 can be constrained to a range greater than or equal to 0° and less than 90°. This can prevent the cover plate 122 from forming a posture parallel to the conduction direction of the second hole end, which is beneficial to ensure the shielding and interception effect of the cover plate 122 on the molten steel. It also makes it easier for the cover plate 122 to form a tendency to rotate towards covering one end of the air passage 1211 under the action of gravity. When the gas is stopped entering the air passage 1211, the cover plate 122 can automatically cut off the air passage 1211 to prevent the molten steel from flowing into the air passage 1211 and leaking out through the air passage 1211.

[0071] For example, the leak-proof part 120 may also include a plurality of fastening screws 126, which pass through the limiting member 125 and are connected to the base 121, thereby fixing the limiting member 125 to the base 121, reducing the risk of the limiting member 125 loosening, and ensuring the limiting effect of the limiting member 125. The aforementioned fastening screws 126 may be fine-thread screws with a diameter greater than or equal to M1 and less than or equal to M3.

[0072] like Figure 3 and Figure 4 As shown, in some examples, the air passage 1211 includes a hexagonal hole section 1211a and an air passage section 1211b, which are connected. The end of the air passage section 1211b away from the hexagonal hole section 1211a is used to connect to the vent 1101 through the mounting groove 1102. The outer peripheral wall of the base 121 is formed with an external thread. The bottom end of the vent brick 110 is provided with a mounting groove 1102 that is connected to the second hole end. The inner peripheral wall of the mounting groove 1102 is formed with an internal thread that matches the external thread. The base 121 is threadedly connected to the mounting groove 1102, and the external thread is coaxially arranged with the hexagonal hole section 1211a.

[0073] In this technical solution, the air passage 1211 may include the aforementioned hexagonal hole section 1211a and the aforementioned air passage section 1211b, the outer peripheral wall of the base 121 may be formed with the aforementioned external thread, the bottom end of the permeable brick 110 may be provided with the aforementioned mounting groove 1102, and the inner peripheral wall of the mounting groove 1102 may be formed with the aforementioned internal thread. Based on the aforementioned configuration, on the one hand, the base 121 and the breathable brick 110 can be threaded together, which facilitates the disassembly and assembly of the leak-proof part 120 and the breathable brick 110. This is beneficial for the regular replacement of the breathable brick 110 and the maintenance of the leak-proof part 120 in practical applications. Furthermore, during the disassembly and assembly of the leak-proof part 120 and the breathable brick 110, the operator can insert the hexagonal end of a hexagonal wrench into the aforementioned hexagonal hole section 1211a, thereby using the hexagonal wrench to rotate the base 121 to tighten or loosen it, which further improves the ease of disassembly and assembly of the leak-proof part 120. On the other hand, when the base 121 is installed on the breathable brick 110, at least a portion of the base 121 can be located within the aforementioned mounting groove 1102, thereby reducing the space occupied by the breathable element 100 and improving the structural compactness of the breathable element 100.

[0074] It is understood that the aforementioned hexagonal hole segment 1211a is hexagonal prism-shaped. The cross-sectional dimensions of the aforementioned hexagonal hole segment 1211a can be set to be adapted to the size of a standard hexagonal wrench. For example, the aforementioned hexagonal hole segment 1211a is adapted to match a hexagonal wrench with a specification of 14.

[0075] Understandably, in practical applications, high-temperature resistant adhesive can be applied between the aforementioned external thread and the aforementioned internal thread.

[0076] For example, the aforementioned external thread and the aforementioned internal thread can be standard coarse threads.

[0077] For example, a movable space is formed between the base 121 and the ventilated brick 110 at one end corresponding to the second hole. This movable space provides room for the cover plate 122 to rotate, allowing it to open or cover one end of the venting channel 1211. When the cover plate 122 opens one end of the venting channel 1211, the venting channel 1211 can connect to the vent hole 1101 through the movable space. Furthermore, in the event of molten steel leaking out of the vent hole 1101, the movable space can contain the molten steel, preventing rapid leakage and facilitating condensation within the space, further reducing the risk of leakage. It is understood that the movable space can be part of the mounting groove 1102.

[0078] like Figure 3 and Figure 4As shown, in some examples, the vent passage 1211 also includes a threaded hole section 1211c, which connects the hexagonal hole section 1211a and the vent passage section 1211b.

[0079] In this technical solution, the gas passage 1211 may further include the aforementioned threaded hole section 1211c. Based on the aforementioned configuration, the gas passage 1211 can be connected to the aforementioned gas supply pipe 200 via the aforementioned threaded hole section 1211c, thereby facilitating the access of argon gas output from the aforementioned argon blowing device and / or carrier gas and refining powder output from the powder spraying device into the gas passage 1211.

[0080] It is understood that the thread specification of the threaded hole section 1211c can be set to be compatible with the thread specification of a standard threaded pipe fitting. For example, the thread of the aforementioned threaded hole section 1211c can be a 2-point fine thread, and correspondingly, the diameter of the aforementioned venting hole section 1211b can be 10mm.

[0081] like Figure 1 As shown, in some examples, the vent 1101 includes a first vent segment 1101a, a second vent segment 1101b, and a third vent segment 1101c. The second vent segment 1101b connects the first vent segment 1101a and the third vent segment 1101c. The end of the first vent segment 1101a away from the second vent segment 1101b is the second vent end, and the end of the third vent segment 1101c away from the second vent segment 1101b is the first vent end. Along the height direction of the vent block 110, at least a portion of the third vent segment 1101c is positioned at a height lower than the second vent segment 1101b.

[0082] In this technical solution, the vent 1101 may include the aforementioned first section 1101a, second section 1101b, and third section 1101c. Based on the aforementioned arrangement, the vent 1101 can extend in a tortuous manner, and a certain height difference can be formed between the third section 1101c and the second section 1101b, thereby increasing the flow resistance and flow difficulty of molten steel in the vent 1101. Furthermore, the vent 1101 can utilize the relatively lower third section 1101c to accommodate a portion of the molten steel, preventing a large amount of molten steel from flowing through the vent 1101 to the leak-proof part 120, which is beneficial to further reduce the risk of molten steel leakage from the vent element 100.

[0083] It is understandable that, in conjunction with the foregoing, when the permeable brick 110 is in the shape of a frustum, the height direction of the permeable brick 110 is the axial direction of the permeable brick 110.

[0084] For example, such as Figure 1 As shown, the third hole segment 1101c can be a U-shaped hole segment, the second hole segment 1101b can be an inverted U-shaped hole segment, and the first hole segment 1101a can be a straight hole segment.

[0085] For example, such as Figure 1 As shown, the number of the aforementioned first hole segment 1101a can be 1, and the number of the aforementioned second hole segment 1101b and third hole segment 1101c can both be multiple, and the second hole segment 1101b and the third hole segment 1101c correspond one-to-one, and the ends of the multiple second hole segments 1101b that are away from the third hole segment 1101c are all connected to the first hole segment 1101a.

[0086] like Figure 7 and Figure 8 As shown, according to a second aspect of the embodiments of this application, a blow-through pipeline assembly 10 is provided, comprising: a gas-permeable element 100 as described in any of the first aspects above; a gas supply pipe 200 having a first port and a second port, the first port being connected to a gas passage 1211, and the second port being connected to the output end of an argon blowing device and / or the output end of a powder spraying device.

[0087] The jetting pipeline assembly 10 provided in this application embodiment includes the aforementioned air supply pipe 200 and a breathable element 100 as proposed in any of the first aspects above. The aforementioned breathable element 100 includes the aforementioned breathable brick 110 and the aforementioned leak-proof part 120. The permeable brick 110 has a vent hole 1101. In practical applications, the permeable brick 110 can be installed at the bottom of the ladle 20, and the first end of the vent hole 1101 can be connected to the interior of the ladle 20. The leak-proof part 120 includes the base 121 and the cover plate 122. The base 121 is embedded in the bottom end of the permeable brick 110, and the cover plate 122 is hinged to the base 121. The cover plate 122 is adapted to open or cover one end of the air passage 1211 on the base 121 by rotating relative to the base 121, so that the air passage 1211 and the vent hole 1101 are connected or cut off accordingly. The air passage 1211 is connected to the aforementioned air supply. The first port of pipe 200 is connected. In practical applications, the second port of gas supply pipe 200 can be used to connect argon gas output from the argon blowing device and / or carrier gas and refining powder output from the powder injection device. When the gas supply pipe 200 is connected to the aforementioned gas, the aforementioned gas can flow into the aforementioned gas passage 1211 through the gas supply pipe 200 and apply pressure to the cover plate 122, so as to cause the cover plate 122 to open one end of the gas passage 1211. Thus, when the cover plate 122 opens one end of the gas passage 1211, the aforementioned gas flows out of the gas passage 1211 and flows to the vent 1101, and can further flow into the ladle 20 through the vent 1101, so as to facilitate the aforementioned ladle refining. The implementation of the smelting process; the aforementioned cover plate 122 is arranged between the second end of the vent 1101 and the air passage 1211 along the conduction direction of the vent 1101, and the conduction direction of the cover plate 122 intersects with that of the vent 1101. Thus, if the molten steel in the ladle 20 leaks through the aforementioned vent 1101, the cover plate 122 can block and intercept the molten steel flowing from the aforementioned second end to the air passage 1211, preventing the molten steel from flowing into the aforementioned air passage 1211 and further leaking outwards. Correspondingly, the side of the cover plate 122 near the second end can be used to intercept the molten steel, and the molten steel intercepted on the cover plate 122 can exert pressure on the cover plate 122. When the amount of molten steel is large, the pressure exerted by the molten steel on the cover plate 122 can cause the cover plate 122 to overcome the pressure of the gas and rotate in the direction of covering one end of the gas passage 1211 until the cover plate 122 covers one end of the gas passage 1211, thereby more reliably blocking the leakage of molten steel. Based on this, the injection pipeline assembly 10 can reduce the risk of a large amount of molten steel leaking out of the venting element 100, which is conducive to improving the safety and stability of the production process and providing a guarantee for the continuous and stable operation of production. This facilitates the enlargement of the aperture of the aforementioned venting hole 1101 to improve the argon blowing efficiency and powder injection efficiency, and helps to shorten the powder injection time during ladle refining.

[0088] It is understood that, based on the aforementioned configuration, the cover plate 122 can rotate relative to the base 121 within a certain angle range. The aforementioned angle range includes multiple angle positions, including a first angle position and a second angle position. When the cover plate 122 is in the first angle position, it can cover one end of the aforementioned air passage 1211. When the cover plate 122 is in the second angle position, it can open one end of the aforementioned air passage 1211. Correspondingly, the conduction direction of the second end of the aforementioned vent 1101 intersects the cover plate 122, meaning that when the cover plate 122 is located at any angle within the aforementioned angle range, the conduction direction of the second end of the vent 1101 can pass through the cover plate 122. In practical applications, the setting of the conduction direction of the second end of the aforementioned vent 1101 intersecting the cover plate 122 can be achieved based on the design of the structural parameters of the vent element 100. The aforementioned structural parameters include, but are not limited to, the structural dimensions of the cover plate 122, the structural dimensions of the vent 1101, the aforementioned angle range, and the relative positional dimensions of the cover plate 122 and the vent 1101. The specific structural parameters of the aforementioned vent element 100 can be set according to actual needs, and are not limited here.

[0089] Understandably, in practical applications, the cover plate 122 can be arranged corresponding to the end of the air passage 1211 near the vent hole 1101 to open or cover the end of the air passage 1211 near the vent hole 1101. Correspondingly, if the end of the air passage 1211 near the vent hole 1101 is the air outlet end of the air passage 1211, the cover plate 122 can be flipped relative to the side of the base 121 where the aforementioned air outlet end is formed to open or cover the aforementioned air outlet end.

[0090] It is understood that the aforementioned first hole end and the aforementioned second hole end are the two ends in the axial direction of the vent hole 1101, and the conduction direction of the aforementioned second hole end refers to the extension direction of the axis of the vent hole 1101 at the aforementioned second hole end.

[0091] It is understood that the conduction direction of the aforementioned second hole end and the conduction direction of the aforementioned air passage 1211 corresponding to one end of the aforementioned cover plate 122 are both separate from the rotation axis of the cover plate 122, thereby facilitating the rotation of the cover plate 122 under the action of gas pressure in the air passage 1211 or the action of molten steel flowing out of the second hole end, so as to open or cover one end of the air passage 1211.

[0092] It is understood that both the aforementioned breathable brick 110 and the aforementioned leak-proof part 120 can be made of heat-resistant materials, which helps the breathable element 100 adapt to high-temperature environments, reduces the risk of damage to the breathable element 100, and extends the service life of the breathable element 100. For example, the aforementioned heat-resistant material can be, but is not limited to, any one of 310S heat-resistant stainless steel, corundum, magnesium oxide, graphite, and tungsten.

[0093] For example, the aforementioned permeable brick 110 can be frustum-shaped, with its two ends in the axial direction being the bottom and top of the permeable brick 110, respectively. The area of ​​the top of the permeable brick 110 is smaller than the area of ​​the bottom. The first hole can be formed at the top of the permeable brick 110, and the permeable hole 1101 extends towards the bottom of the permeable brick 110. The conduction direction of the second hole can coincide with the axial direction of the permeable brick 110, thereby improving the force balance of the permeable brick 110 when the argon gas and / or carrier gas are connected via the second hole, and thus enhancing the installation stability of the permeable brick 110 on the ladle 20. In practical applications, the permeable brick 110 can be inserted through the bottom of the ladle 20. The base 121 is fixed with a fixing plate. The aforementioned base 121 can be cylindrical, and the aforementioned air passage 1211 can pass through the base 121 along its axial direction. The base 121 can be embedded in the bottom end of the air-permeable brick 110, and the base 121 can be coaxial with the air-permeable brick 110. This improves the positional correspondence between the air passage 1211 and the second hole end, facilitating the flow of gas in the air passage 1211 to the air hole 1101. On the other hand, it further enhances the structural stability of the air-permeable element 100 and facilitates the connection of the air passage 1211 to the pipeline. In practical applications, the gap between the base 121 and the air-permeable brick 110 can be coated with high-temperature resistant adhesive to ensure the airtightness of the air-permeable element 100. The two surfaces of the cover plate 122 in the thickness direction and one end of the base 121 in the axial direction can all be parallel to the rotation axis of the cover plate 122. This facilitates the flipping of the cover plate 122 relative to the axial end of the base 121, and allows for the use of both sides of the cover plate 122 in the thickness direction to respectively block and intercept molten steel and cover the venting channel 1211. The cover plate 122 can be arranged corresponding to the top of the base 121, so that the cover plate 122 is positioned between the second hole end and the venting channel 1211. This allows the cover plate 122 to receive the molten steel dripping from the second hole end, and facilitates the rotation of the cover plate 122 towards the end covering the venting channel 1211 under the pressure and gravity of the molten steel, until the venting channel 1211 is covered. Covering one end; if the angle position of the cover plate 122 covering one end of the air passage 1211 is 0°, the angle range of the cover plate 122 relative to the base 121 can be set to be greater than or equal to 0° and less than 90°, thereby avoiding the cover plate 122 forming a posture parallel to the conduction direction of the second hole end, which is conducive to ensuring the shielding and interception effect of the cover plate 122 on the molten steel, and facilitates the cover plate 122 to form a tendency to rotate in the direction of covering one end of the air passage 1211 under the action of gravity. In this way, when the gas is stopped entering the air passage 1211, the cover plate 122 can automatically cut off the air passage 1211, preventing the molten steel from flowing into the air passage 1211 and leaking out through the air passage 1211.

[0094] For example, the aforementioned gas supply pipe 200 may have a first port and a second port, wherein the first port is connected to the aforementioned gas passage 1211; the number of the aforementioned second ports may be two, and the two second ports are respectively connected to the output end of the argon blowing device and the output end of the powder spraying device, that is, the aforementioned gas supply pipe 200 may be a three-way pipe, so that when at least one of the powder spraying device and the argon blowing device is running, the gas passage 1211 may be connected to the argon gas output by the argon blowing device and / or the carrier gas and refining powder output by the powder spraying device. The on / off state of the aforementioned two second ports may be controlled by two independently operable shut-off valves, so that the on / off state between the argon blowing device and the corresponding second port, and the on / off state between the powder spraying device and the corresponding second port may be independently controllable, so as to realize that the gas supply pipe 200 is connected to the output end of the aforementioned argon blowing device and / or the output end of the powder spraying device; or, the number of the aforementioned second ports may be one, and the second port may be connected to the output valve port of the three-way valve, the aforementioned three-way valve having two Two input valve ports are respectively connected to the output end of the argon blowing device and the output end of the powder spraying device. The aforementioned three-way valve has a first working state and a second working state. In the first working state, the connection between the input valve port and the output valve port of the argon blowing device is open, and the connection between the input valve port and the output valve port of the powder spraying device is closed. In the second working state, the connection between the input valve port and the output valve port of the argon blowing device is closed, and the connection between the input valve port and the output valve port of the powder spraying device is open. Thus, by switching the working state of the aforementioned three-way valve, the gas passage 1211 can be connected to the output end of the argon blowing device or the output end of the powder spraying device. It can be understood that during the process of switching the working state of the aforementioned three-way valve, both of the aforementioned output valve ports can be open, so that during this process, the gas supply pipe 200 can be simultaneously connected to the output end of the argon blowing device or the output end of the powder spraying device. The aforementioned three-way valve can be, but is not limited to, a manual three-way valve, an electric three-way valve, or a pneumatic three-way valve 300a.

[0095] like Figure 7 and Figure 8As shown, in some examples, the injection pipeline assembly 10 further includes: a pneumatic three-way valve 300a having a first input port, a second input port, an output port, a first control gas inlet, and a second control gas inlet, with the output port connected to the second port; a first delivery pipe 300b having a third port and a fourth port 301b, the third port being connected to the first input port, the fourth port 301b being connected to the output end of the argon blowing device, and the first control gas inlet being connected to the first delivery pipe 300b; and a second delivery pipe 300c having a fifth port and a sixth port 301c, the fifth port being connected to the second input port, the sixth port 301c being connected to the output end of the powder injection device, and the second control gas inlet being connected to the second delivery pipe 300c; wherein, the pneumatic three-way valve 300a is configured to open the first input port and the output port when the input gas pressure at the first control gas inlet is greater than or equal to the input gas pressure at the second control gas inlet; and to open the second input port and the output port when the input gas pressure at the second control gas inlet is greater than the input gas pressure at the first control gas inlet.

[0096] In this technical solution, the jetting pipeline assembly 10 may also include the aforementioned pneumatic three-way valve 300a, the aforementioned first delivery pipe 300b, and the aforementioned second delivery pipe 300c. Based on the aforementioned configuration, the gas supply pipe 200 can be connected to the aforementioned first delivery pipe 300b and the aforementioned second delivery pipe 300c via a pneumatic three-way valve 300a, and can be connected to the output end of the aforementioned argon blowing device and the output end of the aforementioned powder spraying device via the aforementioned first delivery pipe 300b and the aforementioned second delivery pipe 300c, respectively. The first control gas inlet and the second control gas inlet of the pneumatic three-way valve 300a are respectively connected to the aforementioned first delivery pipe 300b and the aforementioned second delivery pipe 300c, so that the first control gas inlet and the second control gas inlet can be respectively connected to the gas in the first delivery pipe 300b and the gas in the second delivery pipe 300c, so that the pneumatic three-way valve 300a can switch the conduction direction under the pressure difference between the input gas pressure of the first control gas inlet and the input gas pressure of the second control gas inlet. Considering that the output pressure of the powder spraying device is usually greater than the output pressure of the argon blowing device and the duration of argon blowing during the ladle refining process is relatively long, the pneumatic three-way valve 300a is configured such that the input gas pressure of the first control gas inlet is greater than or equal to the input gas pressure of the second control gas inlet. Under the condition of the incoming gas pressure, by connecting the first inlet and outlet, the pneumatic three-way valve 300a can automatically connect the first delivery pipe 300b to the gas supply pipe 200 when the powder spraying device stops outputting, so that the argon gas output from the argon blowing device can enter the gas permeable element 100 to supply argon gas to the ladle 20. Furthermore, by configuring the pneumatic three-way valve 300a to connect the second inlet and outlet when the input gas pressure at the second control gas inlet is greater than the input gas pressure at the first control gas inlet, the pneumatic three-way valve 300a can... When the powder spraying device outputs, the second conveying pipe 300c is automatically connected to the air supply pipe 200 so that the carrier gas and refining powder output by the powder spraying device can be introduced into the air permeable element 100 to achieve powder spraying inside the ladle 20. Based on this, in practical applications, the spraying pipeline assembly 10 can adapt to the output state of the powder spraying device and automatically complete the air path switching. This can reduce the manual intervention of the air path switching operation, which is conducive to reducing personnel injury caused by molten steel splashing during the air path switching process, and can provide further protection for the safe and stable operation of the production process.

[0097] It is understandable that, when applying the same bottom-blowing argon process and powder injection process to the same ladle 20, the argon blowing process often requires a lower pressure for the argon gas input through the bottom of the ladle 20 than the powder injection process requires a lower pressure for the carrier gas input through the bottom of the ladle 20. Furthermore, during the ladle refining process, the duration of the argon blowing process is longer than that of the powder injection process. In view of the aforementioned process characteristics, this application, based on the aforementioned configuration of the technical solution, has the following advantages: Firstly, when both the argon blowing device and the powder spraying device stop outputting, or when the argon blowing device outputs and the powder spraying device stops outputting, the gas pressure in the first delivery pipe 300b will be greater than or equal to the gas pressure in the second delivery pipe 300c. Correspondingly, the input gas pressure at the first control gas inlet will also be greater than or equal to the input gas pressure at the second control gas inlet. Thus, the aforementioned first input port can be connected to the aforementioned output port, and the second input port is cut off from the output port, so as to keep the gas path of the injection pipeline assembly 10 stable and facilitate the continuous delivery of argon gas output by the argon blowing device to the ladle 20. Secondly, when the powder spraying device outputs, the gas pressure in the first delivery pipe 300b will be less than the gas pressure in the second delivery pipe 300c. Correspondingly, the input gas pressure at the first control gas inlet will also be lower than the input gas pressure at the second control gas inlet. As a result, the first input port will gradually switch to a state of disconnection from the output port, and the second input port will gradually switch to a state of connection with the output port, so that the carrier gas and refining powder output by the powder injection device can be delivered to the ladle 20. Thus, the injection pipeline assembly 10 provided in this embodiment can adapt to the output state of the powder injection device and automatically complete the gas path switching. This can reduce the manual intervention of the gas path switching operation, which is beneficial to reducing personnel injury caused by molten steel splashing during the gas path switching process. It can provide further protection for the safe and stable operation of the production process. Moreover, it is easy to modify the original gas path of the ladle refining system during implementation and can have a low gas path modification cost.

[0098] For example, the aforementioned pneumatic three-way valve 300a may have a control unit 310a, a valve body 320a, and a valve core. The control unit 310a has the aforementioned first control air inlet and the aforementioned second control air inlet. The valve body 320a has the aforementioned first input port, second input port, and output port. The valve core is movably disposed within the valve body 320a and has a first working position and a second working position. When the valve core is in the first working position, the first input port is connected to the output port, and the second input port is cut off from the output port. When the valve core is in the second working position, the second input port is connected to the output port, and the first input port is cut off from the output port. The aforementioned control unit 310a has a power output end connected to the aforementioned valve core. The aforementioned power output end is adapted to drive the valve core to move to the first working position when the input gas pressure at the first control air inlet is greater than or equal to the input gas pressure at the second control air inlet, or to drive the valve core to move to the second working position when the input gas pressure at the second control air inlet is greater than the input gas pressure at the first control air inlet. It is understandable that when the valve core is in other working positions between the first and second working positions, the first and second input ports can both be connected to the aforementioned output ports, thereby avoiding pressure loss in the air supply pipe 200 during the switching process of the pneumatic three-way valve 300a, which helps to further reduce the risk of molten steel leakage.

[0099] For example, the aforementioned pneumatic three-way valve 300a can be a high-temperature resistant pneumatic three-way valve.

[0100] For example, at least a portion of the first conveying pipe 300b is arranged along the extension direction of the sidewall of the ladle 20; at least a portion of the second conveying pipe 300c is arranged along the extension direction of the sidewall of the ladle 20. Based on this, the arrangement positions of the first conveying pipe 300b and the second conveying pipe 300c can be closer to the ladle 20, which is beneficial to improving the layout compactness of the ladle refining system.

[0101] For example, the diameter of the first conveying pipe 300b and the diameter of the second conveying pipe 300c can both be greater than or equal to 10 mm and less than or equal to 20 mm.

[0102] like Figure 7 and Figure 8As shown, in some examples, the jetting piping assembly 10 further includes: a first control air pipe 400a, one end of which is connected to a first control air inlet; a second control air pipe 400b, including a first pipe section 420b and a second pipe section 430b, one end of the first pipe section 420b passing through the wall of the second delivery pipe 300c and connected to the interior of the second delivery pipe 300c, and one end of the second pipe section 430b connected to the second control air inlet; a first pressure regulating valve 500a, wherein the first delivery pipe 300b includes a third pipe section 310b and a fourth pipe section 320b, and the third... One end of pipe segment 310b has a third port, and one end of pipe segment 320b has a fourth port. A first pressure regulating valve 500a is connected between the other end of the third pipe segment 310b and the other end of the fourth pipe segment 320b. The other end of the first control air pipe 400a passes through the pipe wall of the third pipe segment 310b and connects to the interior of the third pipe segment 310b. A second pressure regulating valve 500b is connected between the other end of the first pipe segment 420b and the other end of the second pipe segment 430b. The output pressure of the second pressure regulating valve 500b is greater than the output pressure of the first pressure regulating valve 500a.

[0103] In this technical solution, the jetting pipeline assembly 10 may further include the aforementioned first control air pipe 400a, second control air pipe 400b, first pressure regulating valve 500a, and second pressure regulating valve 500b. Based on the aforementioned configuration, the first control gas inlet and the second control gas inlet can be connected to the first delivery pipe 300b and the second delivery pipe 300c respectively via the first control gas pipe 400a and the second control gas pipe 400b, thereby improving the intake stability of the first control gas inlet and the second control gas inlet. By setting a first pressure regulating valve 500a connected between the aforementioned third pipe section 310b and the aforementioned fourth pipe section 320b, and by setting the end of the first control gas pipe 400a away from the first control gas inlet to pass through the pipe wall of the third pipe section 310b and connect to the interior of the third pipe section 310b, the first pressure regulating valve 500a can be located upstream of the first control gas pipe 400a along the internal airflow direction of the first delivery pipe 300b. Thus, the gas introduced into the first delivery pipe 300b can be pressure-regulated by the first pressure regulating valve 500a and delivered at a more stable pressure. The first pressure regulating valve 500b is connected between the first pipe section 420b and the second pipe section 430b, thereby improving the stability of the input gas pressure at the second control gas inlet when the powder injection device is outputting. By configuring the output pressure of the second pressure regulating valve 500b to be greater than that of the first pressure regulating valve 50a, the input gas pressure at the second control gas inlet can be reliably maintained at a higher level than that at the first control gas inlet when the powder injection device is outputting. This helps to maintain the stable conduction state of the pneumatic three-way valve 300a and ensures a stable and reliable supply of the carrier gas output from the powder injection device into the ladle 20.

[0104] It is understandable that both the first pressure regulating valve 500a and the second pressure regulating valve 500b are suitable for opening and outputting gas at a constant pressure when the input gas pressure reaches a certain level.

[0105] For example, the output pressure of the aforementioned first pressure regulating valve 500a is greater than or equal to 0.27 MPa and less than or equal to 0.35 MPa; the output pressure of the aforementioned second pressure regulating valve 500b is greater than or equal to 0.6 MPa and less than or equal to 0.9 MPa.

[0106] For example, both the aforementioned first pressure regulating valve 500a and the second pressure regulating valve 500b are high-temperature resistant pressure regulating valves.

[0107] like Figure 7 and Figure 8As shown, in some examples, the jetting pipeline assembly 10 further includes: a first gas reservoir 600a connected in series between the fourth pipe section 320b and the first pressure regulating valve 500a; a second gas reservoir 600b connected in series between the first pipe section 420b and the second pressure regulating valve 500b; and a one-way valve 700 connected in series between the first pipe section 420b and the second gas reservoir 600b, wherein the one-way valve 700 is unidirectionally open in the direction from the first pipe section 420b to the second gas reservoir 600b.

[0108] In this technical solution, the injection pipeline may further include the aforementioned first gas storage tank 600a, the aforementioned second gas storage tank 600b, and a one-way valve 700. Based on the aforementioned configuration, the injection pipeline assembly 10 can utilize the first gas storage tank 600a to buffer the argon gas supplied to the first delivery pipe 300b, and the first gas storage tank 600a is suitable for being filled to a higher pressure level. This, combined with the aforementioned first pressure regulating valve 500a, facilitates the delivery of argon gas to the ladle 20 at a more stable pressure. Furthermore, if the argon blowing device unexpectedly interrupts its output during the refining process, the injection pipeline assembly 10 can also utilize the argon gas stored in the first gas storage tank 600a to maintain the argon gas supply to the ladle 20, thereby preventing molten steel from seeping into the aforementioned permeable element 100 and further reducing the risk of molten steel leakage. The injection pipeline assembly 10 can utilize the aforementioned second gas storage tank 600a to buffer the argon gas supplied to the ladle 20. The gas tank 600b buffers the gas connected to the second control gas pipe 400b, and the second gas tank 600b is suitable for being filled to a higher pressure level. In conjunction with the aforementioned second pressure regulating valve 500b, this facilitates the delivery of the gas connected to the second control gas pipe 400b to the second control gas inlet at a more stable pressure. This helps ensure the stable conduction state of the pneumatic three-way valve 300a during the output process of the powder spraying device. Furthermore, based on the aforementioned one-way valve 700, it also prevents reverse pressure leakage from the second gas tank 600b, which helps the second gas tank 600b to store and output gas more stably, providing further assurance for the pneumatic three-way valve 300a to maintain a stable conduction state.

[0109] It is understandable that, in practical applications, before the ladle 20 is connected to the molten steel, the first gas storage tank 600a can be filled with argon gas using an argon blowing device so that the first gas storage tank 600a is pre-filled with argon gas at a certain pressure. For example, the first gas storage tank 600a can be filled with argon gas at a pressure greater than or equal to 2.5 MPa and less than or equal to 4 MPa, and the output pressure of the first pressure regulating valve 500a is greater than or equal to 0.27 MPa and less than or equal to 0.35 MPa.

[0110] It is understandable that when the powder spraying device outputs, it will first operate in a mode that only outputs carrier gas for 3 to 10 minutes, and then mix and output the carrier gas and refining powder. In some examples, during the process of the powder spraying device only outputting carrier gas, the gas output pressure is usually greater than or equal to 0.8 MPa and less than or equal to 1.2 MPa. Thus, the second gas storage tank 600b can be quickly filled with gas in the aforementioned process, so that the gas pressure in the second gas storage tank 600b can reach 1 MPa in about 3 seconds. After the second gas storage tank 600b is filled with gas, the gas inside it can be transported to the second control gas inlet through the aforementioned second pressure regulating valve 500b and the second control gas pipe 400b. The output pressure of the aforementioned second pressure regulating valve 500b is greater than or equal to 0.6 MPa and less than or equal to 0.9 MPa.

[0111] For example, the diameter of the portion of the second control air pipe 400b between the outlet end of the second air storage tank 600b and the inlet of the second control air is greater than or equal to 8 mm and less than or equal to 12 mm; the diameter of the portion of the second control air pipe 400b between the inlet end of the second air storage tank 600b and the second delivery pipe 300c is greater than or equal to 10 mm and less than or equal to 20 mm.

[0112] For example, the spray pipeline assembly 10 may also include a needle valve 800b and a pressure relief pipe 800a. One end of the pressure relief pipe 800a is connected to the second gas storage tank 600b, and the other end is used to connect to the external environment or a gas recovery device. The needle valve 800b is installed on the pressure relief pipe 800a and is used to control the exhaust flow of the pressure relief pipe 800a. Based on this, the gas in the second gas storage tank 600b can be output to the second control gas inlet and the pressure relief pipe 800a respectively. This avoids the second gas storage tank 600b from maintaining pressure for a long time after the powder spraying device stops outputting. It is also beneficial for the pneumatic three-way valve 300a to automatically switch to the state where the first input port and the output port are connected after the pressure is released to a certain extent. Taking the output pressure of the first pressure regulating valve 500a as an example, which is greater than or equal to 0.27 MPa and less than or equal to 0.35 MPa, the exhaust flow rate can be set with the target time of reducing the internal pressure of the second gas storage tank 600b from 1 MPa to 0.3 MPa being greater than or equal to 15 minutes and less than or equal to 30 minutes. In practical applications, the exhaust flow rate can also be set according to actual needs, and no further examples will be given here; the needle valve 800b can be a high-temperature resistant needle valve.

[0113] For example, the aforementioned one-way valve 700 can be a high-temperature resistant one-way valve.

[0114] like Figure 8As shown, in some examples, the second control airway 400b includes a U-shaped section 410b connected in series between the one-way valve 700 and the first section 420b.

[0115] In this technical solution, the second control gas pipe 400b may include the aforementioned U-shaped pipe section 410b. Based on the aforementioned configuration, the carrier gas and refining powder in the second delivery pipe 300c can preferentially flow through the aforementioned U-shaped pipe section 410b during their flow to the one-way valve 700. The U-shaped pipe section 410b can provide a relatively tortuous flow path for the aforementioned carrier gas and refining powder, thereby facilitating the separation of the refining powder from the carrier gas during the flow process. This helps reduce the risk of the refining powder flowing into the aforementioned one-way valve 700, and can reduce the risk of blockage of the one-way valve 700, the second gas storage tank 600b, the second pressure regulating valve 500b, and the second control gas inlet, thus ensuring the stable operation of the injection pipeline assembly 10.

[0116] For example, the angle between the axial direction of at least a portion of the aforementioned U-shaped pipe section 410b and the axial direction of the second conveying pipe 300c is greater than or equal to 0° and less than 90°. Based on this, when the carrier gas and the refined powder flow into the aforementioned U-shaped pipe section 410b from the second conveying pipe 300c, a large change in flow direction can occur, which is beneficial to further enhance the promoting effect of the U-shaped pipe section 410b on the phase separation of the carrier gas and the refined powder. Moreover, during the process of the carrier gas and the refined powder flowing through the U-shaped pipe section 410b, the refined powder can be subjected to a greater centrifugal force than the carrier gas, thereby increasing the probability of the refined powder contacting the pipe wall of the U-shaped pipe section 410b. This is beneficial to increase the flow resistance of the refined powder in the U-shaped pipe section 410b and can reduce the risk of the refined powder flowing into the one-way valve 700 through the U-shaped pipe section 410b.

[0117] like Figure 1 As shown, in some feasible examples, the jetting pipeline assembly 10 may also include a third pressure regulating valve 900, which is connected in series between the first gas storage tank 600a and the fourth pipe section 320b. Based on this, during the inflation process of the first gas storage tank 600a, the gas flowing to the first gas storage tank 600a can preferentially pass through the third pressure regulating valve 900 for pressure regulation, which is beneficial to the more stable and reliable inflation of the first gas storage tank 600a.

[0118] For example, the output pressure of the third pressure regulating valve 900 can be the same as the output pressure of the first pressure regulating valve 500a.

[0119] For example, there may be multiple third pressure regulating valves 900 connected in series between the first gas storage tank 600a and the fourth pipe section 320b.

[0120] For example, the aforementioned third pressure regulating valve 900 can be a high-temperature resistant pressure regulating valve.

[0121] Furthermore, since the jetting pipeline assembly 10 provided in this application includes a breathable element 100 as proposed in any of the first aspects above, it possesses some of the beneficial effects of the breathable element 100, which will not be elaborated here.

[0122] In this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection; "link" can mean a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0123] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0124] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0125] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A blowpipe line assembly, characterized by, The application relates to a gas injection pipeline assembly for a ladle. The gas injection pipeline assembly comprises: a gas-permeable element comprising: a gas-permeable brick provided with a gas-permeable hole, a first hole end of the gas-permeable hole being used for communication with the inside of the ladle; a leakage-proof part comprising a base and a cover plate, the base being embedded in the bottom end of the gas-permeable brick and provided with a gas passing channel, the cover plate being hingedly connected to the base and used for opening or covering one end of the gas passing channel, the second hole end of the gas-permeable hole being communicated with the cover plate along the direction of the second hole end, the cover plate being arranged between the second hole end and the gas passing channel along the direction of the second hole end, and a movable space being formed between one end of the second hole end and the gas-permeable brick corresponding to the base; wherein, when the cover plate opens one end of the gas passing channel, the gas passing channel is communicated with the gas-permeable hole through the movable space; the gas passing channel comprises a hexagonal hole section and a gas passing hole section, the hexagonal hole section and the gas passing hole section being communicated with each other, one end of the gas passing hole section away from the hexagonal hole section being used for communication with the gas-permeable hole, the outer circumferential wall of the base being formed with external threads, the bottom end of the gas-permeable brick being provided with a mounting groove communicated with the second hole end, the inner circumferential wall of the mounting groove being formed with internal threads matched with the external threads, the base being threadedly connected with the mounting groove, the external threads being coaxially arranged with the hexagonal hole section, and high-temperature resistant glue being coated between the external threads and the internal threads; the gas injection pipeline assembly further comprises: a gas supply pipe having a first pipe opening and a second pipe opening, the first pipe opening being communicated with the gas passing channel, and the second pipe opening being used for communication with the output end of the argon blowing device and / or the output end of the powder spraying device; a pneumatic three-way valve having a first input opening, a second input opening, an output opening, a first control gas inlet and a second control gas inlet, the output opening being communicated with the second pipe opening; a first conveying pipe having a third pipe opening and a fourth pipe opening, the third pipe opening being communicated with the first input opening, the fourth pipe opening being used for communication with the output end of the argon blowing device, and the first control gas inlet being communicated with the first conveying pipe; a second conveying pipe having a fifth pipe opening and a sixth pipe opening, the fifth pipe opening being communicated with the second input opening, the sixth pipe opening being used for communication with the output end of the powder spraying device, and the second control gas inlet being communicated with the second conveying pipe; 2. The injection line assembly of claim 1, wherein, wherein, the pneumatic three-way valve is configured to communicate the first input opening and the output opening when the input gas pressure of the first control gas inlet is greater than or equal to the input gas pressure of the second control gas inlet, and to communicate the second input opening and the output opening when the input gas pressure of the second control gas inlet is greater than the input gas pressure of the first control gas inlet; at least part of the first conveying pipe is arranged along the extension direction of the side wall of the ladle; at least part of the second conveying pipe is arranged along the extension direction of the side wall of the ladle; the diameter of the first conveying pipe and the diameter of the second conveying pipe are both greater than or equal to 10 mm and less than or equal to 20 mm. the leakage-proof part further comprises: a rotating shaft rotatably arranged in the base; a connecting rod connected between the rotating shaft and the cover plate; A limiting member is arranged on the base and is used to limit the rotation of the cover plate away from the air passage.

3. The injection pipe assembly according to claim 1, wherein, The air passage further comprises a threaded hole section, which is communicated between the hexagonal hole section and the air hole section.

4. The injection pipe assembly according to any one of claims 1 to 3, wherein, The air hole comprises a first hole section, a second hole section and a third hole section, the second hole section is communicated between the first hole section and the third hole section, one end of the first hole section away from the second hole section is the second hole end, and one end of the third hole section away from the second hole section is the first hole end; wherein, along the height direction of the air brick, the position height of at least part of the third hole section is lower than the position height of the second hole section.

5. The injection line assembly of any one of claims 1 to 3, wherein, Further comprising: A first control gas pipe, one end of the first control gas pipe is communicated with the first control gas inlet; A second control gas pipe, comprising a first pipe section and a second pipe section, one end of the first pipe section is communicated with the inside of the second conveying pipe by penetrating the pipe wall of the second conveying pipe, and one end of the second pipe section is communicated with the second control gas inlet; A first pressure regulating valve, the first conveying pipe comprises a third pipe section and a fourth pipe section, one end of the third pipe section has the third pipe opening, one end of the fourth pipe section has the fourth pipe opening, the first pressure regulating valve is connected between the other end of the third pipe section and the other end of the fourth pipe section, and the other end of the first control gas pipe is communicated with the inside of the third pipe section by penetrating the pipe wall of the third pipe section; A second pressure regulating valve, connected between the other end of the first pipe section and the other end of the second pipe section, the output pressure of the second pressure regulating valve is greater than the output pressure of the first pressure regulating valve.

6. The blow pipe assembly of claim 5, wherein, Further comprising: A first gas storage tank, connected in series between the fourth pipe section and the first pressure regulating valve; A second gas storage tank, connected in series between the first pipe section and the second pressure regulating valve; A one-way valve, connected in series between the first pipe section and the second gas storage tank, the one-way valve is unidirectional in the direction from the first pipe section to the second gas storage tank.

7. The injection pipe assembly according to claim 6, wherein, The second control gas pipe comprises a U-shaped pipe section, which is connected in series between the one-way valve and the first pipe section.

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