Steel ladle blowing device

Abstract

The utility model relates to the technical field of metal smelting, in particular to a steel ladle blowing device. The steel ladle blowing device comprises a first butt joint structure, and the first butt joint structure is used for being in butt joint with a second butt joint structure arranged at the bottom of a steel ladle and blowing inert gas into the steel ladle. The first butt joint structure comprises a base, a one-way valve assembly and a positioning sealing assembly. The base is provided with an air blowing channel, the air blowing channel is provided with an air inlet and an air outlet, the one-way valve assembly is provided with a valve body and an installation assembly, and the installation assembly is connected with the valve body and the base and used for providing first pre-tightening force abutting against and sealing the air outlet for the valve body; the positioning and sealing assembly is arranged on the periphery of the air outlet of the base and used for achieving butt-joint positioning and sealing of the first butt-joint structure and the second butt-joint structure. According to the steel ladle blowing device, the sealing reliability of the air outlet of the blowing channel is improved, and the situation that steel slag and dust enter the blowing channel due to untight sealing of the air outlet is effectively avoided.

Description

Technical Field

[0001] The present application relates to the technical field of metal smelting, and in particular to a ladle blowing device. Background Art

[0002] Ladle argon blowing treatment, also known as argon blowing treatment of molten steel, is a simple out-of-furnace refining method for degassing molten steel and removing non-metallic inclusions.

[0003] Using argon blowing in the ladle can reduce the content of dissolved gases (such as hydrogen, nitrogen, and oxygen) in the molten steel; remove residual non-metallic inclusions (such as oxides, sulfides, nitrides, etc.) in the molten steel; make the composition and temperature of the molten steel uniform before pouring, which can significantly reduce the pouring start temperature, normalize the continuous casting process, and improve the impact toughness of the steel.

[0004] The existing flat plate docking device for argon blowing of ladle on the market includes an upper structure and a lower structure that are docked up and down. The upper structure is installed at the bottom of the ears on both sides of the ladle, and the lower structure is installed on the ladle car. When the ladle is sitting, the upper structure is pressed down onto the lower structure, and a rubber sealing ring is installed on the contact surface of the lower structure. The contact between the two is sealed by the sealing ring, thus ensuring no air leakage.

[0005] The existing sealing ring of the butt joint surface is installed in an inner oblique groove, which is extremely inconvenient to install and replace. In addition, the gas source of the lower structure is connected from the bottom of the interior, and the lower structure is installed on the ladle car, which means that the installation surface of the ladle car needs to be pierced before installation, which makes the modification work heavy.

[0006] More importantly, during the ladle refining process, slag will fall from the ladle onto the surface of the lower structure of the docking device, affecting the sealing effect of the upper and lower structures and even causing air leakage. The existing design relies on blowing air from the lower structure to clean the lower structure with airflow. When the argon blowing operation is not performed, the limit pin and the baffle cooperate to limit the position, seal the argon outlet, separate the argon channel from the outside, and prevent slag and dust from entering the argon channel. When argon is introduced, the baffle is blown to drive the limit pin upward, and the airflow is blown out from between the baffle and the outer periphery of the outlet. However, when the ladle is moved away and argon is not blown, the baffle only relies on its own gravity to contact the round bottom plate, and the air outlet is not sealed tightly enough to prevent slag and dust from entering the argon channel. Utility Model Content

[0007] The present application provides a ladle blowing device, which improves the reliability of sealing the air outlet of the blowing channel and effectively avoids steel slag and dust from entering the blowing channel due to poor sealing of the air outlet.

[0008] To achieve the above technical effects, the present application provides a ladle blowing device, comprising a first docking structure, the first docking structure being used to dock with a second docking structure provided at the bottom of the ladle and blowing inert gas into the ladle;

[0009] The first docking structure comprises:

[0010] The base is provided with an air blowing channel, wherein the air blowing channel is provided with an air inlet and an air outlet;

[0011] A one-way valve assembly, comprising a valve body and a mounting assembly, wherein the mounting assembly is connected to the base and the valve body and is used to provide a first pre-tightening force for the valve body to abut and seal the air outlet;

[0012] A positioning and sealing component is arranged on the base and located at the periphery of the air outlet, and is used to realize the docking positioning and sealing of the first docking structure and the second docking structure.

[0013] In some embodiments, the first preload force is an elastic force, and the mounting assembly includes:

[0014] An installation positioning member and a fixing pin, wherein the installation positioning member is installed on the base through the fixing pin and extends above the air outlet, the installation positioning member is provided with a sliding guide hole, the valve body is slidably connected to the installation positioning member through the sliding guide hole, and the valve body seals the air outlet when it moves away from the installation positioning member toward the air outlet;

[0015] The elastic member is arranged between the valve body and the installation positioning member, and is used for driving the valve body to move away from the installation positioning member.

[0016] In some embodiments, the mounting positioning member is a mounting plate or a metal spring extending above the air outlet.

[0017] In some embodiments, the valve body comprises:

[0018] A guide shaft, slidingly matched with the sliding guide hole;

[0019] A sealing terminal is connected to the guide shaft and the end of the sealing terminal facing away from the guide shaft is provided with a conical sealing surface matching the air outlet, and the end of the sealing terminal close to the guide shaft is provided with an annular limiting surface abutting against and limiting the elastic member.

[0020] In some embodiments, the positioning seal assembly includes:

[0021] An annular boss connected to the base and located at the periphery of the air outlet;

[0022] A sealing ring, arranged on the outer periphery of the annular boss;

[0023] An annular pressing plate is arranged on the outer periphery of the annular boss and is detachably connected to the base, and a limiting groove for fixing the sealing ring is formed between the annular boss and the annular pressing plate.

[0024] In some embodiments, the width of the limiting groove gradually decreases from the groove bottom to the groove opening; or, the groove opening width of the limiting groove is smaller than the cross-sectional dimension of the sealing ring.

[0025] In some embodiments, the inner wall surface of the annular boss includes a frustum with a radial dimension gradually increasing from close to the air outlet to away from the air outlet, and the inner periphery of the annular boss is provided with a first filter assembly covering the air outlet and the one-way valve assembly.

[0026] In some embodiments, the first filter assembly is provided with guide inclined holes, and the guide inclined holes are evenly distributed along the periphery of the air outlet; and all the guide inclined holes extend obliquely in a clockwise or counterclockwise direction to generate a rotating airflow in a preset direction.

[0027] In some embodiments, the base includes an upper body and a lower body, and the blowing channel includes a first channel provided in the upper body and a second channel provided in the lower body;

[0028] The second channel includes a first sub-channel and a second sub-channel that are connected by bending, the first sub-channel is sealed and connected to the first channel, and the second sub-channel extends through and extends to the side wall of the lower seat body.

[0029] In some embodiments, a second filter component is disposed in the first channel and / or the second channel.

[0030] In some embodiments, a second docking structure is further included, wherein the second docking structure is disposed at the bottom of the ladle and is used to dock and seal with the first docking structure and connect the blowing channel with the interior of the ladle.

[0031] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art: when the first docking structure is not docked with the second docking structure arranged at the bottom of the ladle, that is, when no inert gas such as argon is blown, the one-way valve assembly connects the valve body and the base through the mounting assembly, and uses the mounting assembly to provide a first pre-tightening force to the valve body, so that the valve body is abutted and sealed at the outlet of the blowing channel, thereby improving the sealing performance of the outlet. When it is necessary to blow inert gas into the ladle, a second docking structure is arranged at the bottom of the ladle and the ladle and the second docking structure are moved to the top of the first docking structure, and the docking positioning and sealing between the first docking structure and the second docking structure are achieved by using the positioning sealing assembly; at the same time, inert gas is introduced into the air inlet, and when the inert gas pressure of the blowing channel exceeds the preset pressure, the first pre-tightening force is overcome, the valve body is driven to be out of the state of abutting and sealing the outlet, and the blowing channel is connected, so that the inert gas for stirring is introduced into the ladle through the second docking structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0034] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0035] Figure 1 A schematic diagram of a set of longitudinal sections of a ladle blowing device provided in an embodiment of the present application;

[0036] Figure 2 A schematic diagram of another set of longitudinal sections of the ladle blowing device provided in an embodiment of the present application.

[0037] Description of reference numerals:

[0038] 100-first docking structure; 101-upper seat; 102-lower seat; 103-first channel; 104-second channel; 105-valve body; 106-elastic member; 107-installation positioning member; 108-fixing pin; 109-annular boss; 110-sealing ring; 111-annular pressure plate; 112-first filter assembly; 113-second filter assembly;

[0039] 200 - second docking structure. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0042] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a change in posture or a change in motion state, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0043] In order to solve the technical problem in the prior art that the argon gas channel of the ladle blowing device has poor sealing performance at the air outlet of the blowing channel in the non-blowing state, which easily causes dust and slag to enter the blowing channel, the present application provides a ladle blowing device, which can improve the sealing performance of the air outlet of the blowing channel in the non-blowing state, prevent slag and dust from falling into the blowing channel and affecting the argon blowing stirring effect.

[0044] See also Figure 1 and Figure 2The embodiment of the present application provides a ladle blowing device, comprising a first docking structure 100, which is used to dock with a second structure installed at the bottom of the ladle, so as to blow inert gas into the ladle through the second docking structure 200. The first docking structure 100 includes a base, a one-way valve assembly and a positioning seal assembly.

[0045] The base is provided with a blowing channel, and the blowing channel is provided with an air inlet and an air outlet, and the air inlet and the air outlet are connected to each other. The positioning sealing component and the air outlet are both arranged on the end face of the base facing the second docking structure 200, and the positioning sealing component is arranged on the periphery of the air outlet, so as to realize the docking positioning and connection sealing of the first docking structure 100 and the second docking structure 200, and ensure that the inert gas (usually argon gas, and other gases can also be used as needed) blown out of the air outlet of the blowing channel can enter the interior of the ladle through the second docking structure 200, so as to avoid leakage at the first docking structure 100 and the second docking structure 200 during the blowing process.

[0046] The second docking structure 200 is usually arranged at the bottom of the ladle, and correspondingly, the positioning sealing assembly and the gas outlet are arranged on the top end surface of the base. The ladle and the second docking structure 200 are moved together to the top of the first docking structure 100, and the first docking structure 100 and the second docking structure 200 are sealedly docked with each other by means of the positioning sealing assembly.

[0047] The one-way valve assembly includes a valve body 105 and a mounting assembly. The mounting assembly serves to connect the base and the valve body 105, and can provide a first pre-tightening force to the valve body 105 to abut against the sealed air outlet. In the non-blowing state, the first pre-tightening force provided by the mounting assembly presses the valve body 105 against the air outlet, improves the sealing performance of the valve body 105 to the air outlet, and effectively prevents steel slag and dust from entering the blowing channel through the air outlet.

[0048] When the ladle needs to be blown, argon or other inert gases are introduced into the blowing channel through the air inlet. As the amount of argon introduced into the blowing channel increases, the gas pressure in the blowing channel also increases accordingly. When the thrust generated by the gas pressure in the blowing channel acting on the valve body 105 is greater than the sum of the first preload force and the gravity of the valve body 105, that is, when the pressure of the inert gas introduced into the blowing channel exceeds the preset pressure, the valve body 105 is driven to move away from the air outlet, and the air outlet is connected. The first docking structure 100 can continuously blow argon or other inert gases into the interior of the ladle through the second docking structure 200 to degas and remove impurities from the molten steel.

[0049] In one embodiment provided in the application, the first preload force adopts elastic force. The installation assembly mainly includes an installation positioning member 107, an elastic member 106 and a fixing pin 108. One end of the installation positioning member 107 is fixedly connected to the base through the fixing pin 108, and the other end extends to the top of the air outlet. A sliding guide hole is provided at one end of the installation positioning member 107 extending above the air outlet. The valve body 105 is slidably connected to the installation positioning member 107 through the sliding guide hole, so that the valve body 105 can slide toward or away from the air outlet. The elastic member 106 can be a spring that is sleeved on the valve body 105 and abuts against the limit between the valve body 105 and the installation positioning member 107. The spring is in a pre-compressed state. With the help of the elastic force generated by the pre-compression of the spring as the first preload force, the valve body 105 is driven away from the installation positioning member 107 and moves toward the air outlet, so that the valve body 105 is tightly against the air outlet, and the air outlet and the blowing channel are sealed.

[0050] When the pressure of the inert gas introduced into the blowing channel from the air inlet exceeds the preset pressure, the first preload force generated by the elastic member 106 acting on the valve body 105 and the gravity of the valve body 105 are overcome, driving the valve body 105 to slide toward the installation positioning member 107 away from the air outlet, and compressing the elastic member 106 at the same time.

[0051] In some other embodiments, the first preload force may also be a magnetic force. Exemplarily, the mounting assembly also includes a mounting locator 107 and a fixing pin 108, one end of the mounting locator 107 is fixedly connected to the base by the fixing pin 108, and the other end extends above the air outlet. A sliding guide hole is provided at one end of the mounting locator 107 extending above the air outlet, and the valve body 105 is slidably connected to the mounting locator 107 through the sliding guide hole, so that the valve body 105 can slide toward or away from the air outlet. Magnetic parts can be respectively provided on the opposite end faces of the valve body 105 and the mounting locator 107, and the magnetic parts of the two are arranged relative to each other with the same magnetic poles. The magnetic repulsion force generated between the magnetic parts is used as the first preload force to abut the valve body 105 against the air outlet.

[0052] Alternatively, magnetic parts are respectively arranged at the sealing end faces of the valve body 105 and the air outlet, and the two magnetic parts are arranged with opposite poles. The magnetic attraction force generated between the magnetic parts is used as the first pre-tightening force to abut the valve body 105 against the air outlet.

[0053] In addition, the magnetic components can also be respectively arranged on the end faces of the valve body 105 and the mounting positioning component 107 that are opposite to each other, and on the sealing end faces of the valve body 105 and the gas outlet that cooperate with each other. The magnetic components arranged on the end faces of the valve body 105 and the mounting positioning component 107 are arranged with the same magnetic poles facing each other, and the magnetic components arranged on the sealing end faces of the valve body 105 and the gas outlet that cooperate with each other are arranged with different magnetic poles facing each other.

[0054] It should be noted that when the magnetic member is disposed on the sealing end surface where the valve body 105 and the gas outlet cooperate with each other, the magnetic member should be disposed so as not to affect the sealing of the gas outlet by the valve body 105. The mounting positioning member 107 can be a mounting plate or a metal spring connected to the base and extending above the gas outlet.

[0055] Reference for the setting of valve body 105 and mounting locator 107 Figure 1 , a guide shaft is provided at one end of the valve body 105 close to the installation positioning member 107, and a sealing terminal is provided at one end of the valve body 105 close to the air outlet. The guide shaft is inserted into the sliding guide hole of the installation positioning member 107 and is slidably connected with the installation positioning member 107 through the sliding guide hole. The length of the guide shaft is at least enough to ensure that when the sealing terminal abuts against the air outlet, the end of the guide shaft away from the sealing terminal is still located in the sliding guide hole, so as to prevent the valve body 105 from being separated from the installation positioning member 107. During installation, the guide shaft can be inserted into the sliding guide hole first, and then the sealing terminal abuts against the air outlet, and finally the installation positioning member 107 can be fixed to the base using the fixing pin 108, so that the installation positioning member 107 extends above the air outlet.

[0056] In some embodiments, a conical sealing surface is provided at one end of the sealing terminal away from the guide shaft, and the sealing performance of the sealing terminal to the air outlet is improved by means of the conical sealing surface, so as to improve the airtightness of the air outlet and the air blowing channel in the non-blowing state. An annular limiting surface is provided at one end of the sealing terminal close to the guide shaft, and the annular limiting surface is used for abutment of the spring sleeved on the valve body 105, so as to drive the valve body 105 to maintain the state of abutting the sealing air outlet by means of the elastic force generated by the pre-compression of the spring as the first pre-tightening force.

[0057] In the above embodiment, the positioning seal assembly includes an annular boss 109, a sealing ring 110 and an annular pressing plate 111, the annular boss 109 is connected to the upper end surface of the base and is located at the periphery of the air outlet, and the annular pressing plate 111 is arranged at the periphery of the annular boss 109 and is detachably connected to the base. When the annular pressing plate 111 is fixed to the base, an annular limiting groove is formed between the periphery of the annular boss 109 and the inner periphery of the annular pressing plate 111, and the sealing ring 110 is fixed in the limiting groove. By setting a detachable annular pressing plate 111 to cooperate with the annular boss 109 to form a limiting groove, the installation, replacement and maintenance of the sealing ring 110 are convenient. When the sealing ring 110 needs to be installed or replaced, it is only necessary to remove the annular pressing plate 111 first, sleeve the sealing ring 110 on the periphery of the annular boss 109, and finally fix the annular pressing plate 111 to the base, and clamp and fix the sealing ring 110 with the annular boss 109, thereby improving the reliability of the fixing of the sealing ring 110 and the convenience of installation and replacement.

[0058] Exemplarily, the upper end surface of the base and the annular end surface of the annular pressure plate 111 that fit together can have multiple groups of first fixing holes opened in the circumferential direction, and the annular pressure plate 111 can have second fixing holes opened in the circumferential direction, the number and position of which correspond one-to-one to the first fixing holes. The annular pressure plate 111 can achieve a detachable connection with the base by means of the first fixing holes, the second fixing holes and fasteners.

[0059] Furthermore, a straight groove may be provided on the bottom end surface of the annular pressing plate 111 that is in contact with the base as required, so that a straight screwdriver can be inserted into the straight groove to pry the annular pressing plate 111 off the upper end surface of the base, thereby completing the removal of the annular pressing plate 111.

[0060] In some embodiments, in order to improve the reliability of fixing the sealing ring 110, the limiting groove is set to be in a form where the width gradually decreases from the bottom of the groove to the groove opening, so that the sealing ring 110 is pressed into the limiting groove, and only a small part near the top of the sealing ring 110 is exposed from the limiting groove when the sealing ring 110 is horizontally placed in the limiting groove. The cross section of the sealing ring 110 is usually set to be circular, and the cross-sectional diameter is larger than the groove opening width of the limiting groove, which effectively prevents the sealing ring 110 from being squeezed out of the limiting groove, thereby improving the sealing performance when the first docking structure 100 and the second docking structure 200 are docked.

[0061] In the illustrated embodiment, the cross-section of the limit groove presents a trapezoidal structure, which effectively ensures the convenience of clamping the sealing ring 110 and the reliability of fixing. The inner wall surface of the annular boss 109 presents a truncated table surface with a radial dimension gradually increasing from the direction close to the air outlet to the direction away from the air outlet. The inner periphery of the annular boss 109 is provided with a first filter component 112, and the periphery of the first filter component 112 abuts against the inner wall surface of the annular boss 109. At the same time, the first filter component 112 covers the one-way valve component to filter a certain particle of steel slag and reduce the larger particles of slag falling around the air outlet. Smaller particles of slag and dust will be blown away from the periphery of the air outlet during blowing, thereby effectively preventing slag from falling in the blowing channel.

[0062] Furthermore, the first filter component 112 is provided with a plurality of guide inclined holes, all of which are distributed in a circular shape on the periphery of the air outlet, and the inclined extension direction of all the guide inclined holes is counterclockwise or clockwise, so that the airflow discharged from the air outlet is blown out along the guide inclined holes of the first filter component 112, generating a rotating airflow in the same extension direction as the guide inclined holes, so as to fully purge the periphery of the air outlet and the first filter component 112.

[0063] In some embodiments, the base includes an upper body 101 and a lower body 102, and a mounting positioning surface is convexly provided on the outer periphery of the upper body 101, and the upper body 101 is fixed to the lower body 102 by pressing and covering with an annular cover plate. An elastic support structure is arranged between the lower body 102 and the upper body 101, and the elastic support structure can generally adopt a disc spring assembly. The blowing channel includes a first channel 103 and a second channel 104, the first channel 103 is opened in the upper body 101, and the second channel 104 is arranged in the lower body 102. In order to reduce the modification of the ladle transfer vehicle and facilitate the supply of air to the air inlet of the blowing channel, the second channel 104 can be bent so that the air inlet of the blowing channel or the second channel 104 extends to the side wall of the lower body 102.

[0064] Taking the first channel 103 vertically opened in the upper body 101 as an example, the second channel 104 may include a first sub-channel vertically opened in the lower body 102 and a second sub-channel bent and extended to the side wall of the lower body 102. The first channel 103 and the first sub-channel are connected through a channel connector, and the first sub-channel and the second sub-channel are integrally formed and both are generally L-shaped. The bottom end of the channel connector is plugged and sealed in the first sub-channel, and the top end of the channel connector and the first channel 103 are sealed and connected by a conical mating surface.

[0065] The above arrangement allows the first docking structure 100 to be directly fixed on the ladle transfer vehicle, and inert gas is introduced from the air inlet on the side wall of the first docking structure 100. There is no need to modify the ladle transfer vehicle, and the inert gas is introduced from the bottom of the ladle transfer vehicle, reducing the modification cost.

[0066] In some embodiments, a second filter assembly 113 for filtering steel slag is further provided in the air blowing channel, and the second filter assembly 113 can be provided in the first channel 103, or in the first subchannel of the second channel 104. It is preferred to provide the first channel 103 close to the air outlet, and the advantage of such a setting is that even if a small amount of steel slag enters the air blowing channel through the air outlet, it will be filtered and isolated at the second filter assembly 113, and the second filter assembly 113 is provided close to the air outlet, so that the steel slag isolated above the second filter assembly 113 can be blown out of the air blowing channel during blowing.

[0067] The ladle blowing device provided in the embodiment of the present application also includes a second docking structure 200, which is used to be installed at the bottom of the ladle and communicated with the air-permeable bricks at the bottom of the ladle. The second docking structure 200 can achieve docking sealing with the first docking structure 100 by means of a positioning sealing component, so that the inner periphery of the positioning sealing component is communicated with the inert gas channel of the second docking structure 200, that is, the second docking structure 200 cooperates with the positioning sealing component to connect the blowing channel and the inside of the ladle. The second docking structure 200 can adopt the flat plate structure shown in the figure, and can also adopt other structures that meet the requirements of docking sealing and blowing.

[0068] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0069] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0070] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A ladle blowing device, characterized in that: It comprises a first docking structure, wherein the first docking structure is used to dock with a second docking structure arranged at the bottom of the ladle and blow inert gas into the ladle; The first docking structure comprises: The base is provided with an air blowing channel, wherein the air blowing channel is provided with an air inlet and an air outlet; A one-way valve assembly, comprising a valve body and a mounting assembly, wherein the mounting assembly connects the base and the valve body and is used to provide a first pre-tightening force to the valve body to abut and seal the air outlet; when the pressure of the inert gas introduced into the air blowing channel exceeds a preset pressure, the valve body is driven to move away from the air outlet; A positioning and sealing component is arranged on the base and located at the periphery of the air outlet, and is used to realize the docking positioning and sealing of the first docking structure and the second docking structure.

2. The ladle blowing device according to claim 1, characterized in that: The first preload force is an elastic force, and the mounting assembly comprises: An installation positioning member and a fixing pin, wherein the installation positioning member is installed on the base through the fixing pin and extends above the air outlet, the installation positioning member is provided with a sliding guide hole, the valve body is slidably connected to the installation positioning member through the sliding guide hole, and the valve body seals the air outlet when it moves away from the installation positioning member toward the air outlet; The elastic member is arranged between the valve body and the installation positioning member, and is used for driving the valve body to move away from the installation positioning member.

3. The ladle blowing device according to claim 2, characterized in that: The installation positioning member is a mounting plate or a metal spring extending above the air outlet.

4. The ladle blowing device according to claim 2, characterized in that: The valve body comprises: A guide shaft, slidingly matched with the sliding guide hole; A sealing terminal is connected to the guide shaft and the end of the sealing terminal facing away from the guide shaft is provided with a conical sealing surface matching the air outlet, and the end of the sealing terminal close to the guide shaft is provided with an annular limiting surface abutting against and limiting the elastic member.

5. The ladle blowing device according to any one of claims 1 to 4, characterized in that: The positioning seal assembly comprises: An annular boss connected to the base and located at the periphery of the air outlet; A sealing ring, arranged on the outer periphery of the annular boss; An annular pressing plate is arranged on the outer periphery of the annular boss and is detachably connected to the base, and a limiting groove for fixing the sealing ring is formed between the annular boss and the annular pressing plate.

6. The ladle blowing device according to claim 5, characterized in that: The width of the limiting groove gradually decreases from the groove bottom to the groove opening; or, the groove opening width of the limiting groove is smaller than the cross-sectional dimension of the sealing ring.

7. The ladle blowing device according to claim 5, characterized in that: The inner wall surface of the annular boss includes a frustum with a radial dimension gradually increasing from the direction close to the air outlet to the direction away from the air outlet. The inner periphery of the annular boss is provided with a first filter component covering the one-way valve component.

8. The ladle blowing device according to claim 7, characterized in that: The first filter assembly is provided with guide inclined holes, which are evenly distributed along the periphery of the air outlet; and all the guide inclined holes extend obliquely in a clockwise or counterclockwise direction to generate a rotating airflow in a preset direction.

9. The ladle blowing device according to claim 1, characterized in that: The base includes an upper body and a lower body, and the blowing channel includes a first channel provided in the upper body and a second channel provided in the lower body; The second channel includes a first sub-channel and a second sub-channel that are connected by bending, the first sub-channel is sealed and connected to the first channel, and the second sub-channel extends through and extends to the side wall of the lower seat body.

10. The ladle blowing device according to claim 9, characterized in that: A second filter component is disposed in the first channel and / or the second channel.

11. The ladle blowing device according to claim 1, characterized in that: It also includes a second docking structure, which is arranged at the bottom of the ladle and is used to dock and seal with the first docking structure and connect the blowing channel with the interior of the ladle.

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