Automatic argon butt joint device for ladle car of LF (ladle furnace)

Abstract

The utility model discloses a ladle furnace (LF) buggy ladle argon automatic butt joint device which comprises a buggy ladle structure, an argon gas channel is arranged on the surface of a buggy ladle body, a valve seat, a valve body, a tip cone and other components are sequentially arranged in the buggy ladle body, a heat-resisting sealing body is connected through a spring sleeve rod, and a gas guide plate is provided with a valve gas channel. When the argon blowing device works and a steel ladle is in butt joint with a buggy ladle, a gas nozzle of the steel ladle is in contact with the heat-resistant sealing body, argon input equipment is started, argon pressure pushes away the valve body to achieve argon blowing, and the valve body is reset after argon blowing is finished. Compared with the prior art, the argon blowing device solves the problem that slag accumulation and gas leakage are prone to occurring in a traditional butt joint mode, and argon butt joint sealing performance is improved through the special structural design; the argon blowing device ensures the molten steel argon blowing effect, achieves automatic butt joint and stable gas supply, is easy and convenient to operate, reduces manual intervention, improves the working efficiency and adapts to the severe production environment of the LF refining furnace.

Description

Technical Field

[0001] This utility model relates to the field of refining furnace technology, specifically an automatic argon gas docking device for ladle cars in an LF refining furnace. Background Technology

[0002] In the LF refining process, the ladle car plays a crucial role as an indispensable transportation and carrying tool. It not only needs to receive ladles full of molten steel and accurately transport them to different working positions such as refining, wire feeding, and ladle lifting, but also needs to operate stably in harsh production environments to prevent molten steel from splashing and protect electrical motors. With the continuous advancement of smelting technology and the accelerating pace of production, higher requirements have been placed on the performance, functions, and operating efficiency of the LF refining furnace ladle car, prompting it to continuously develop in a more professional, practical, and feature-rich direction.

[0003] However, most current LF refining furnace ladle cars achieve automatic argon connection by connecting the saddle seats on both sides of the ladle car with the ladle trunnions. However, slag is prone to accumulate at the saddle seats on both sides of the ladle car, causing misalignment and unevenness of the interface, resulting in air leakage, affecting the argon blowing effect of molten steel, and having a significant impact on process quality.

[0004] To address these issues, this invention provides an automatic argon gas docking device for LF refining furnace ladle cars. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an automatic argon gas docking device for LF refining furnace ladle cars, which solves the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic argon docking device for an LF refining furnace ladle car, comprising a ladle car structure, the ladle car structure including a car body, an argon gas channel being provided on the surface of the car body corresponding to the position of the ladle argon gas nozzle, a valve seat being fixedly provided in the lower middle position inside the argon gas channel, a valve body being slidably sealed on the upper side of the valve seat inside the argon gas channel, and a top cone being fixedly provided on the upper surface of the valve body, the tip of the top cone being fixed to a guide plate passing through a heat-resistant sealing body and an upper end cap fixed above the guide plate, the heat-resistant sealing body being slidably sealed at the upper port position of the argon gas channel by a spring sleeve rod in conjunction with a corresponding sliding groove opened on the upper side of the inner wall of the argon gas channel, and a valve gas channel being provided in the part of the rod of the guide plate located below the heat-resistant sealing body.

[0007] Preferably, the lower part of the argon gas duct is connected to the argon gas input device inside the vehicle body, and a through valve hole is provided at the center of the valve seat, and the valve hole is configured as a funnel shape that is wider at the top and narrower at the bottom.

[0008] Preferably, the valve body is gyroscope-shaped, and the lower conical end is sealed and inserted inside the valve seat.

[0009] Preferably, several spring rods are connected between the valve body and the valve seat to constrain the lifting and lowering of the valve body and to reset its movement. Several through holes for argon gas to pass through are opened between the spring rods on the outer ring side of the upper surface of the valve body.

[0010] Preferably, the air guide plate consists of a main rod, three support rods fixed to the upper end of the main rod, and a Y-shaped plate fixed between the support rods and the main rod, wherein the main rod passes downward from the center position through the heat-resistant sealing body and is then fixed to the top cone.

[0011] Preferably, both the air guide plate and the upper end cover are located on the upper side of the heat-resistant sealing body.

[0012] Preferably, the heat-resistant sealing body has a W-shaped cross-section, with its upper side protruding from the argon gas passage and contacting the inner wall of the jet nozzle on the bottom surface of the ladle when docking with it.

[0013] Beneficial effects

[0014] This invention provides an automatic argon gas docking device for the ladle car of an LF refining furnace. Compared with the prior art, it has the following advantages:

[0015] (1) The automatic argon gas docking device for the LF refining furnace ladle car is configured with an argon gas channel, valve body, top cone and heat-resistant sealing body on the car body surface corresponding to the argon gas nozzle position of the ladle. When the bottom nozzle of the ladle comes into contact with the heat-resistant sealing body, as the argon gas pressure increases, the valve body drives the top cone to move upward. The top cone inserts into the conical groove on the bottom surface of the heat-resistant sealing body. The upper port of the valve channel passes over the heat-resistant sealing body and squeezes it, increasing the sealing performance with the inner wall of the argon gas nozzle. When blowing argon, the argon gas pressure causes the heat-resistant sealing body to move slightly along the inner wall of the argon gas channel, further adhering to the inner wall of the ladle argon gas nozzle, effectively preventing argon gas leakage, improving the sealing performance of argon gas docking, ensuring the argon blowing effect of molten steel, and guaranteeing process quality.

[0016] (2) The automatic argon gas docking device for the LF refining furnace ladle car is designed by setting argon gas channels, valve bodies, top cones and heat-resistant sealing bodies on the car body surface at the corresponding argon gas nozzle positions of the ladle. After the ladle gas nozzle contacts the heat-resistant sealing body, the argon gas input device inside the car body is activated. When the argon gas pressure reaches a certain level, the valve body will be automatically pushed open to realize the passage for argon gas to enter the ladle. After the argon blowing is completed, the valve body can be reset under the elastic force of the spring rod to prevent argon gas leakage, thus realizing automatic docking and stable gas supply of argon gas. The entire docking process does not require auxiliary positioning. The ladle can be docked with the ladle car by relying on the hoisting equipment to assist in the lowering of the ladle. The operation is simple, reduces manual intervention and improves work efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural perspective view of this utility model;

[0018] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the top cone and its connecting structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the heat-resistant sealing body of this utility model;

[0021] Figure 5 This is the utility model Figure 2 Enlarged view of point A in the middle.

[0022] In the diagram: 1. Steel ladle car structure; 11. Car body; 111. Argon gas passage; 1111. Valve seat; 112. Valve body; 113. Top cone; 1131. Valve gas passage; 1132. Gas guide plate; 1133. Upper end cover; 114. Heat-resistant sealing body; 1141. Spring sleeve rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5An automatic argon gas docking device for an LF refining furnace ladle car includes a ladle car structure 1, which includes a car body 11. An argon gas passage 111 is formed on the surface of the car body 11 at a position corresponding to the argon gas nozzle of the ladle. The lower part of the argon gas passage 111 is connected to an argon gas input device inside the car body 11. A valve seat 1111 is fixedly installed at the lower middle position inside the argon gas passage 111, and a through valve hole is formed at the center of the valve seat 1111. The valve hole is funnel-shaped, wider at the top and narrower at the bottom. The interior of the argon gas passage 111 slides on the upper side of the valve seat 1111. The dynamic seal is provided with a valve body 112, which is gyroscope-shaped, with its lower conical end sealed and inserted inside the valve seat 1111. Several spring rods are connected between the valve body 112 and the valve seat 1111, which are used to constrain the lifting and lowering of the valve body 112 and to move and reset it. Several through holes for argon gas to pass through are opened between the spring rods on the outer ring side of the upper surface of the valve body 112. A top cone 113 is fixedly installed at the middle position of the annularly distributed through holes on the upper surface of the valve body 112. The top cone 113 is conical, and its tip is fixed to the gas guide plate 1132. The upper end cap 1133 is fixed. The gas guide plate 1132 consists of a main rod, three support rods fixed to the upper end of the main rod, and a Y-shaped plate fixed between the support rods and the main rod. The main rod passes downward from the center through the heat-resistant sealing body 114 and is fixed to the top cone 113. The gas guide plate 1132 and the upper end cap 1133 are both located on the upper side of the heat-resistant sealing body 114. At least one ear plate is fixed in a ring array along the axis below the outer side of the heat-resistant sealing body 114, and the heat-resistant sealing body 114 cooperates with the ear plates to form a corresponding opening on the upper side of the inner wall of the argon gas passage 111. The sliding seal of the sliding groove is set at the upper port of the argon gas passage 111, and a spring sleeve rod 1141 is fixedly installed inside the sliding groove. The lower end of the spring sleeve rod 1141 is sealed and inserted into the ear plate of the heat-resistant sealing body 114, and the spring of the spring sleeve rod 1141 presses against the upper surface of the ear plate. The heat-resistant sealing body 114 has a W-shaped cross section, and the upper side protrudes out of the argon gas passage 111. When docking with the ladle, it contacts the inner wall of the jet nozzle on the bottom surface of the ladle. The valve passage 1131 is opened in the part of the rod on the lower side of the heat-resistant sealing body 114.

[0025] After the ladle car is moved to the position below the ladle and aligned, the ladle is lowered with the assistance of the hoisting equipment. Its bottom nozzle contacts the heat-resistant sealing body 114. At this time, the argon input device inside the car body 11 is activated, and argon enters the argon gas passage 111. Initially, due to the elastic force of the spring rod, the lower conical end of the valve body 112 is sealed inside the valve seat 1111, preventing argon from flowing out. As the argon pressure increases, it overcomes the elastic force of the spring rod, causing the valve body 112 to move the top cone 113 upwards. The lower conical end disengages from the valve seat 1111 seal, and the upper conical end of the top cone 113 inserts into the conical groove on the bottom surface of the heat-resistant sealing body 114. The upper port of the valve passage 1131 passes over the heat-resistant sealing body 114, compressing... The heat-resistant sealing body 114 increases its sealing performance with the inner wall of the argon gas outlet, and the upper and lower spaces of the heat-resistant sealing body 114 are connected through the valve passage 1131. Then, the argon gas passes through the valve hole of the valve seat 1111, the through hole on the upper surface of the valve body 112, and the valve passage 1131 in sequence, and is diverted into the ladle by the gas guide plate 1132. When blowing argon, the argon gas pressure causes the heat-resistant sealing body 114 to move slightly along the inner wall of the argon gas passage 111, and further press against the inner wall of the argon gas outlet of the ladle. When the blowing of argon ends, the argon gas input equipment stops supplying gas, the pressure in the argon gas passage 111 decreases, the spring rod elasticity causes the valve body 112 to reset, and the lower cone end re-seals the valve seat 1111 to prevent argon gas leakage.

[0026] In summary, by setting an argon gas passage 111, a valve body 112, a top cone 113, and a heat-resistant sealing body 114 on the surface of the vehicle body 11 corresponding to the argon gas nozzle of the ladle, when the bottom nozzle of the ladle comes into contact with the heat-resistant sealing body 114, as the argon pressure increases, the valve body 112 drives the top cone 113 to move upward, and the top cone 113 inserts into the conical groove on the bottom surface of the heat-resistant sealing body 114. The upper end of the valve passage 1131 passes over the heat-resistant sealing body 114 and squeezes it, increasing the sealing performance with the inner wall of the argon gas nozzle. During argon blowing, the argon gas pressure causes the heat-resistant sealing body 114 to move slightly along the inner wall of the argon gas passage 111, further pressing it tightly against the inner wall of the ladle argon gas nozzle, effectively preventing argon gas leakage, improving the sealing performance of the argon gas connection, and ensuring the molten steel blowing... Argon effect ensures process quality; by setting argon gas passage 111, valve body 112, top cone 113 and heat-resistant sealing body 114 on the surface of the car body 11 corresponding to the argon gas nozzle of the ladle, after the ladle nozzle comes into contact with the heat-resistant sealing body 114, the argon gas input device inside the car body 11 is activated. When the argon gas pressure reaches a certain level, it will automatically push open the valve body 112 to realize the passage for argon gas to enter the ladle. After the argon blowing is completed, the valve body 112 can be reset under the elastic force of the spring rod to prevent argon gas leakage, realizing automatic docking and stable gas supply of argon gas. The entire docking process does not require auxiliary positioning. It can be docked with the ladle car by relying on the hoisting equipment to assist the ladle in falling. The operation is simple, reduces manual intervention and improves work efficiency.

[0027] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0028] Working principle: When the ladle car moves under the ladle for docking, the ladle and ladle car are aligned. Then, with the assistance of the hoisting equipment, the ladle gradually falls and docks with the ladle car. This process does not require any auxiliary positioning. During docking, the gas vent on the bottom of the ladle gradually approaches and contacts the heat-resistant sealing body 114. At this time, the argon gas input device inside the car body 11 starts working, and argon gas enters the argon gas passage 111. Since the valve body 112 and the valve seat 1111 are connected by a spring rod, in the initial state, the valve body 112 is controlled by the spring. The upward elastic force of the rod causes the lower conical end to seal inside the valve seat 1111, preventing argon from flowing out. As argon continues to enter the argon passage 111, the argon pressure gradually increases. When the pressure reaches a certain level, sufficient to overcome the elastic force of the spring rod on the valve body 112, the valve body 112 begins to drive the top cone 113 upward. The lower conical end gradually disengages from the seal of the valve seat 1111. Simultaneously, the upper conical end of the top cone 113 inserts into the conical groove in the middle of the bottom surface of the heat-resistant sealing body 114, causing the upper port of the valve passage 1131 to pass over the heat-resistant sealing body 114 and move into the heat-resistant... The space above the sealing body 114 is compressed to the circumferential side, increasing the sealing performance between the heat-resistant sealing body 114 and the inner wall of the argon gas outlet. At this time, the space above and below the heat-resistant sealing body 114 is connected through the valve passage 1131. Then, argon gas enters the space above the valve body 112 through the valve hole of the valve seat 1111 and the through hole on the outer ring side of the upper surface of the valve body 112. After passing through the valve passage 1131, it enters the ladle through the argon gas outlet via the gas guide plate 1132 (when the valve body 112 and the top cone 113 move upward, they will push against each other). The trigger valve structure at the ladle argon outlet position is opened to realize the argon blowing operation. During this process, the argon gas pressure acts on the lower surface of the heat-resistant sealing body 114, causing the heat-resistant sealing body 114 to move slightly along the inner wall of the argon gas passage 111, further pressing against the inner wall of the ladle argon outlet to enhance the sealing effect. After the argon blowing is completed, the argon gas input equipment stops supplying gas, and the pressure inside the argon gas passage 111 decreases. At this time, the elasticity of the spring rod causes the valve body 112 to move upward and reset, and the lower cone end is resealed and inserted into the valve seat 1111 to prevent argon gas leakage.

[0029] It should be noted that the argon gas outlet of the ladle is equipped with a trigger valve structure similar to valve body 112 and valve seat 1111.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A LF refining ladle car argon automatic docking device, comprising a ladle car structure (1), the ladle car structure (1) comprising a car body (11), characterized in that: The surface of the vehicle body (11) is provided with an argon gas channel (111) corresponding to the position of the argon gas nozzle of the ladle, a valve seat (1111) is fixedly arranged at the middle and lower position inside the argon gas channel (111), a valve body (112) is slidingly and sealingly arranged at the upper side of the valve seat (1111) inside the argon gas channel (111), the upper surface of the valve body (112) is fixedly provided with a top cone (113), the tip of the top cone (113) is fixed with a gas guide plate (1132) penetrating through the heat-resistant sealing body (114) and an upper end cover (1133) fixed above the gas guide plate (1132), the heat-resistant sealing body (114) is slidingly and sealingly arranged at the upper port position of the argon gas channel (111) through the spring sleeve rod (1141) cooperating with the sliding groove arranged above the inner wall of the argon gas channel (111), and a valve gas channel (1131) is arranged in the part of the rod body below the heat-resistant sealing body (114).

2. The LF refining ladle car argon automatic docking device according to claim 1, characterized in that: The lower part of the argon gas channel (111) is communicated with the argon gas input device inside the vehicle body (11), a through valve hole is arranged at the center position of the valve seat (1111), and the valve hole is in the shape of a funnel with the upper part being wide and the lower part being narrow.

3. The LF refining ladle car argon automatic docking device according to claim 1, characterized in that: The valve body (112) is in the shape of a top, and the lower cone end is sealingly inserted into the inside of the valve seat (1111).

4. The LF refining ladle car argon automatic docking device according to claim 1, characterized in that: A plurality of spring rods are connected between the valve body (112) and the valve seat (1111), and the valve body (112) is lifted and reset by the spring rods, a plurality of through holes for argon gas passing through are arranged on the outer ring side of the upper surface of the valve body (112) between the spring rods.

5. The LF refining ladle car argon automatic docking device according to claim 1, characterized in that: The gas guide plate (1132) is composed of a main rod, three support rods fixed at the upper end of the main rod, and a Y-shaped plate body fixed between the support rods and the main rod, wherein the rod body of the main rod is fixed with the top cone (113) after sealingly penetrating through the heat-resistant sealing body (114) from the center position downward.

6. The LF refining ladle car argon automatic docking device according to claim 1, characterized in that: The gas guide plate (1132) and the upper end cover (1133) are both located at the upper side of the heat-resistant sealing body (114).

7. The LF refining ladle car argon automatic docking device according to claim 1, characterized in that: The cross section of the heat-resistant sealing body (114) is in the shape of W, the upper side protrudes from the argon gas channel (111), and contacts with the inner wall of the gas nozzle of the ladle bottom surface when the ladle is connected.

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