Small casting steel ladle strengthening bottom blowing device

Abstract

The utility model provides a small casting steel ladle strengthening bottom blowing device which comprises a steel ladle body, a plurality of supporting frames fixed to the lower surface of the steel ladle body, a buggy ladle used for containing the steel ladle body, a lug fixed to the outer portion of the steel ladle body and a positioning assembly installed on the upper surface of the buggy ladle. The small casting ladle strengthening bottom blowing device comprises a ladle main body, a sealing assembly arranged on the ladle main body, a ladle car arranged on the ladle main body, a gas transmission cavity arranged on the ladle car, two gas permeable bricks fixedly arranged at the bottom of the ladle main body, two gas blowing pipes respectively communicated with the two gas permeable bricks, and a gas transmission pipe arranged at the bottom of the ladle car. The gas conveying tank can be sealed after argon blowing is completed, so that the gas pressure between the gas conveying tank and the two air bricks is balanced with the pressure applied by molten steel to the two air bricks, the suck-back phenomenon between the two air bricks and the gas blowing pipe is prevented, erosion of molten steel scum to the air bricks is reduced, and the service life of the air bricks is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of metal smelting, in particular to a small -size casting ladle intensification bottom blowing device. BACKGROUND

[0002] Small -size special steel smelting or casting industry often adopts intermediate frequency furnace smelting, and often uses a ladle (pouring upper part molten steel tapping method) or a casting ladle (bottom molten steel tapping method) in the casting process.

[0003] This process in the smelting special steel process, since the liquid metal stirring is not strong in the smelting process, after pouring into the ladle to the casting process has no stirring, easy to appear in the molten steel composition uneven, finally lead to the ingot or electrode billet composition segregation big, inclusion can not fully float, affect the uniformity and purity of the billet, therefore need after liquid metal pours into the ladle and carries out bottom blowing treatment, makes argon into the ladle, forms a large number of small argon bubbles, and the liquid metal is stirred, and the liquid metal temperature is uniform, and the impurities are effectively removed, so that the quality of the liquid metal is improved.

[0004] At present, when carrying out bottom blowing operation, the external argon source and the argon pipe in the ladle are connected or disconnected manually, and in the process of connecting or disconnecting the external argon source and the argon pipe in the ladle manually, the high-temperature environment around the ladle seriously endangers the health of workers, and has certain safety hazards; and when the argon blowing operation is finished, the gas supply is disconnected, therefore the impurities in the molten steel will accumulate at the gas permeable brick under the influence of gravity, easily sink into the gas permeable brick, cause the gas permeable brick to be blocked and unable to normally ventilate, and when the gas supply is stopped, the reverse suction phenomenon is easily generated, further affect the gas permeable brick, when the gas supply is restored, the gas path is not smooth, affect the subsequent use of the ladle, and shorten the service life of the gas permeable brick. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a small -size casting ladle intensification bottom blowing device to solve the above -mentioned problems.

[0006] In order to realize the above -mentioned purpose, the utility model embodiment provides a small -size casting ladle intensification bottom blowing device, which comprises a ladle body, a plurality of support frames fixed on the lower surface of the ladle body, a ladle car for placing the ladle body, an ear seat fixed on the outside of the ladle body, a positioning assembly installed on the upper surface of the ladle car, a gas conveying cavity arranged on the ladle car, two gas permeable bricks fixed on the bottom of the ladle body, two gas blowing pipes respectively connected with the two gas permeable bricks, a gas conveying pipe installed on the bottom of the ladle car, a argon blowing device installed on the gas conveying cavity and the ladle body and connected with the gas conveying pipe and the two gas blowing pipes, and a sealing assembly installed on the ladle body and the argon blowing device, wherein

[0007] The positioning assembly is adapted to limit the movement of the ladle body during the process of placing the ladle body to the ladle car;

[0008] The argon blowing device is adapted to deliver the argon from the external gas supply device to the ladle body from the bottom of the ladle body;

[0009] The closing assembly is adapted to close the part of the argon blowing device close to the ladle body when the argon blowing device stops working.

[0010] Further, the argon blowing device comprises a control seat fixedly installed in the gas delivery cavity, a movable slot opened on the control seat, a sealing seat slidably inserted in the movable slot, a mounting slot opened on the sealing seat, a gas delivery tank fixedly installed at the bottom of the ladle body, a sealing ring fixed at the bottom of the gas delivery tank, two gas inlet pipes respectively connected with the two gas blowing pipes at one end and connected with the gas delivery tank at the other end, a plurality of gas outlet slots annularly arranged on the outer wall of the gas delivery pipe at the upper end, and a top support fixed on the sealing seat and the ladle car;

[0011] The upper end of the gas delivery pipe is arranged in the mounting slot;

[0012] The diameter of the gas inlet slot is greater than the diameter of the gas delivery pipe.

[0013] Further, the argon blowing device further comprises an upper sealing gasket fixed on the lower surface of the sealing ring, an assembly slot opened on the upper surface of the sealing seat and corresponding to the upper sealing gasket, a lower sealing gasket fixed in the assembly slot, a sealing sleeve movably sleeved on the outside of the gas delivery pipe and fixed in the mounting slot, a wedge-shaped sealing ring fixed at the bottom of the sealing sleeve, a pressing ring movably sleeved on the outside of the gas delivery pipe and fixed in the gas delivery cavity, and a pressing slot opened on the upper surface of the pressing ring and corresponding to the wedge-shaped sealing ring.

[0014] Further, the closing assembly comprises an assembly frame fixed in the gas delivery tank, a movable column fixed in the assembly frame, a sliding slot opened in the movable column, a reset spring fixed in the sliding slot, a movable rod slidably inserted in the sliding slot and fixedly connected with the lower end of the reset spring, a closing plate fixed at the bottom of the movable rod, two limiting rods symmetrically fixed on the upper surface of the closing plate and movably installed on the assembly frame, and a sealing plug fixed on the lower surface of the closing plate and corresponding to the gas inlet slot.

[0015] Further, the top support comprises a plurality of guide rods annularly arranged on the lower surface of the sealing seat and movably installed on the ladle car, and a plurality of top support springs movably sleeved on the outside of the guide rods.

[0016] The upper and lower ends of the top supporting spring are fixedly connected with the lower surface of the sealing seat and the inner wall of the gas conveying cavity respectively.

[0017] Further, the positioning assembly comprises two supporting seats fixed symmetrically on the ladle car, two control grooves respectively formed in the two supporting seats, two positioning blocks respectively arranged in the two control grooves, a plurality of positioning rods fixed symmetrically on the outer portion of the ladle body, and a plurality of positioning grooves symmetrically formed on the upper surfaces of the two positioning blocks.

[0018] Further, the positioning assembly further comprises a plurality of extension rods fixed symmetrically on the lower surfaces of the two positioning blocks respectively, a plurality of extension grooves symmetrically formed in the two supporting seats respectively and corresponding to the plurality of extension rods respectively, a plurality of control springs movably sleeved on the outer portions of the plurality of extension rods respectively, a plurality of limiting blocks fixed symmetrically in the two control grooves respectively, and two limiting grooves symmetrically formed in the two positioning blocks respectively and corresponding to the plurality of limiting blocks respectively.

[0019] Compared with the prior art, the embodiments of the utility model have the following beneficial effects:

[0020] The small-sized ladle strengthening bottom blowing device can automatically connect the gas conveying pipe with the two gas blowing pipes when the ladle body is placed on the ladle car, at which time the staff can remotely control the gas supply equipment to input argon into the gas conveying pipe, so that the argon is conveyed into the two gas permeable bricks through the gas blowing pipes and then into the metal liquid in the ladle body, thereby uniformly mixing the composition and temperature of the metal liquid, reducing the content of inclusions and harmful gases, and improving the quality of the metal liquid, without the need for the staff to connect or disconnect the external argon source and the argon pipe in the ladle body, thereby reducing the labor intensity and avoiding the safety problems that may be caused by manual pipeline connection.

[0021] The small-sized ladle strengthening bottom blowing device can close the gas conveying tank when the argon supply is interrupted, so that the gas pressure between the gas conveying tank and the two gas permeable bricks is balanced with the pressure exerted by the molten steel on the two gas permeable bricks, thereby reducing the erosion of the gas permeable bricks by the slag of the molten steel, preventing the reverse suction phenomenon of the two gas permeable bricks and the gas blowing pipes, reducing the impact on the gas permeable bricks, and ensuring the service life of the gas permeable bricks when the gas supply is restored.

[0022] The small casting ladle reinforced bottom blowing device pushes the sealing plug and the sealing plate in the sealing assembly to move upward when the argon blowing device works, so that the gas conveying pipe and the gas conveying tank are communicated, relative to the sealing plug being opened by the gas flow to complete gas conveying, the stability of the gas flow in the gas conveying process is effectively improved, the pressure and the flow of the argon gas do not appear large changes, the sustainability and the stability of the argon conveying are ensured, the bottom blowing effect of the ladle is improved, and the treatment effect of the argon on the metal liquid is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] The utility model is further explained below in combination with the drawings and examples.

[0024] Figure 1 The utility model discloses a perspective view shows;

[0025] Figure 2 The utility model discloses a partial split perspective view shows;

[0026] Figure 3 The utility model discloses a sectioned perspective view shows the ladle car of the utility model;

[0027] Figure 4 The utility model discloses a partial perspective view shows;

[0028] Figure 5 The utility model discloses a partial sectioned perspective view shows Figure 1 .

[0029] Figure 6 The utility model discloses a partial sectioned perspective view shows;

[0030] Figure 7 The utility model discloses a partial sectioned perspective view shows Figure 2 .

[0031] Figure 8 The utility model discloses a partial sectioned perspective view shows Figure 3 .

[0032] In the drawing

[0033] 1, ladle body; 2, support frame; 3, ladle car; 4, ear seat; 5, positioning assembly; 6, gas conveying cavity; 7, gas permeable brick; 8, gas blowing pipe; 9, gas conveying pipe; 10, argon blowing device; 11, closing assembly; 12, control seat; 13, movable groove; 14, sealing seat; 15, mounting groove; 16, gas conveying tank; 17, sealing ring; 18, gas inlet groove; 19, gas inlet pipe; 20, gas outlet groove; 21, top support; 22, upper sealing gasket; 23, assembly groove; 24, lower sealing gasket; 25, sealing sleeve; 26, wedge-shaped sealing ring; 27, extrusion ring; 28, extrusion groove; 29, assembly frame; 30, movable column; 31, sliding groove; 32, return spring; 33, movable rod; 34, closing plate; 35, limiting rod; 36, sealing plug; 37, guide rod; 38, top support spring; 39, support seat; 40, control groove; 41, positioning block; 42, positioning rod; 43, positioning groove; 44, extension rod; 45, extension groove; 46, control spring; 47, limiting block; 48, limiting groove. DETAILED DESCRIPTION

[0034] The utility model will be explained further in detail now in combination with the drawings. These drawings are all simplified schematic diagrams, and only schematically show the basic structure of the utility model, so it only shows the structure related to the utility model.

[0035] As Figures 1-8 shown, a small-sized ladle reinforced bottom blowing device, comprising: a ladle body 1, a plurality of support frames 2 fixed on the lower surface of the ladle body 1, a ladle car 3 for placing the ladle body 1, an ear seat 4 fixed on the outside of the ladle body 1, a positioning assembly 5 mounted on the upper surface of the ladle car 3, a gas conveying cavity 6 arranged on the ladle car 3, two gas permeable bricks 7 fixed on the bottom of the ladle body 1, two gas blowing pipes 8 respectively connected with the two gas permeable bricks 7, a gas conveying pipe 9 mounted on the bottom of the ladle car 3, an argon blowing device 10 mounted on the gas conveying cavity 6 and the ladle body 1 and connected with the gas conveying pipe 9 and the two gas blowing pipes 8, and a closing assembly 11 mounted on the ladle body 1 and the argon blowing device 10, wherein

[0036] The positioning assembly 5 is suitable for limiting the movement of the ladle body 1 during the process of placing the ladle body 1 on the ladle car 3;

[0037] The argon blowing device 10 is suitable for conveying the argon gas from the external gas supply device from the bottom of the ladle body 1 to the inside of the ladle body 1;

[0038] The closed assembly 11 is suitable for plugging the part of the argon blowing device 10 close to the ladle body 1 when the argon blowing device 10 stops working. When in use, the lug seat 4 is arranged to facilitate lifting the ladle body 1 containing molten metal to be directly above the ladle car 3. When the ladle body 1 is lowered, the positioning assembly 5 is arranged to accurately position the ladle body 1 and limit the position of the downward movement of the ladle body 1, so as to ensure the accuracy of the position of the ladle body 1 placed on the ladle car 3, thereby avoiding damage to the argon blowing assembly due to inaccurate docking during the downward movement of the ladle body 1. When the lower end of the ladle body 1 enters the gas conveying cavity 6, the gas conveying pipe 9 and the two gas blowing pipes 8 are automatically connected under the action of the argon blowing device 10. At this time, the staff can remotely control the gas supply equipment to input argon gas into the gas conveying pipe 9, so that the argon gas is conveyed into the two gas permeable bricks 7 through the gas blowing pipes 8 and then into the molten metal in the ladle body 1, thereby uniformly mixing the composition and temperature of the molten metal, reducing the content of inclusions and harmful gases, and improving the quality of the molten metal. The staff does not need to connect or disconnect the external argon gas source and the argon gas pipe in the ladle body 1, thereby reducing the labor intensity and avoiding safety problems that may be caused by manual connection of the pipeline. When the bottom blowing is completed and the ladle body 1 is lifted away, the closed assembly 11 is arranged to close the gas conveying tank 16 when the argon supply is cut off, so that the gas pressure between the gas conveying tank 16 and the two gas permeable bricks 7 is balanced with the pressure exerted by the molten steel on the two gas permeable bricks 7, thereby reducing the erosion of the molten steel scum on the gas permeable bricks 7, preventing the two gas permeable bricks 7 and the gas blowing pipes 8 from being sucked back, reducing the impact on the gas permeable bricks 7, and ensuring the service life of the gas permeable bricks 7, so that the replacement cycle of the gas permeable bricks 7 is lengthened. When the argon blowing device 10 is working, the sealing plug 36 in the closed assembly 11 and the closing plate 34 are pushed upward by the gas conveying pipe 9 to make the gas conveying pipe 9 and the gas conveying tank 16 communicate. Compared with the gas flow used to flush the sealing plug 36 to complete the gas conveying, the stability of the gas flow during the gas conveying process is effectively improved, the pressure and flow of the argon gas do not change greatly, the continuity and stability of the argon gas conveying are ensured, and the bottom blowing effect of the ladle is improved.

[0039] Optionally, the argon blowing device 10 comprises a control seat 12 fixedly installed in the gas conveying cavity 6, a movable slot 13 opened on the control seat 12, a sealing seat 14 slidingly inserted in the movable slot 13, a mounting slot 15 opened on the sealing seat 14, a gas conveying tank 16 fixedly installed at the bottom of the ladle main body 1, a sealing ring 17 fixedly installed at the bottom of the gas conveying tank 16, a gas inlet slot 18 opened at the bottom of the gas conveying tank 16, two gas inlet pipes 19 respectively communicated with one end of the two gas blowing pipes 8 and communicated with the other end of the gas conveying tank 16, a plurality of gas outlet slots 20 annularly arranged at the outer wall of the upper end of the gas conveying pipe 9, and a top support 21 arranged on the sealing seat 14 and the ladle car 3.

[0040] The upper end of the gas conveying pipe 9 is arranged in the mounting slot 15.

[0041] The diameter of the gas inlet slot 18 is greater than the diameter of the gas conveying pipe 9. When the ladle main body 1 is hung on the ladle car 3 and the lower end of the ladle main body 1 enters the gas conveying cavity 6, the gas conveying tank 16 is pressed and moves downward in the movable slot 13 during the downward movement of the ladle main body 1, and at the same time, the gas conveying pipe 9 moves upward relative to the sealing seat 14 during the downward movement of the sealing seat 14, so that the plurality of gas outlet slots 20 are moved out of the sealing seat 14, and the gas conveying pipe 9 can enter the gas conveying tank 16 through the gas inlet slot 18. During use, the gas supply equipment can convey argon gas into the gas conveying tank 16 through the gas conveying pipe 9 and the plurality of gas outlet slots 20, and then convey the argon gas into the two gas permeable bricks 7 through the two gas inlet pipes 19 in cooperation with the two gas blowing pipes 8, and then into the molten metal in the ladle main body 1. The argon gas exists in the form of bubbles in the molten metal, and the bubbles float upward under the action of buoyancy and drive the molten metal to circulate, thereby achieving the effects of uniformizing the composition and temperature of the molten steel, reducing the content of inclusions and harmful gases, and improving the quality of the molten metal. During the overall bottom blowing process, the ladle utilizes the self-weight to cooperate with the argon blowing assembly to automatically connect the gas conveying pipe 9 and the two gas blowing pipes 8, so that the staff can control the gas supply device to perform argon blowing treatment at a remote position, thereby reducing the labor intensity and avoiding safety problems that may be caused by manual connection of the pipeline. During use, since the diameter of the gas inlet slot 18 is greater than the diameter of the gas conveying pipe 9, the upper end of the gas conveying pipe 9 accurately penetrates the gas inlet slot 18 to enter the gas conveying tank 16, and it is not easy to cause structural damage due to misalignment.

[0042] Optionally, the argon blowing device 10 further comprises an upper sealing pad 22 fixed on the lower surface of the sealing ring 17, an assembly groove 23 opened on the upper surface of the sealing seat 14 and corresponding to the upper sealing pad 22, a lower sealing pad 24 fixed in the assembly groove 23, a sealing sleeve 25 movably sleeved on the outside of the gas conveying pipe 9 and fixed in the mounting groove 15, a wedge-shaped sealing ring 26 fixed on the bottom of the sealing sleeve 25, a pressing ring 27 movably sleeved on the outside of the gas conveying pipe 9 and fixed in the gas conveying cavity 6, and a pressing groove 28 opened on the upper surface of the pressing ring 27 and corresponding to the wedge-shaped sealing ring 26. When the ladle body 1 is placed on the tundish, the upper sealing pad 22 and the lower sealing pad 24 are pressed against each other, thereby sealing the abutting position of the sealing seat 14 and the gas conveying tank 16. When the sealing seat 14 is pressed downward, the pressing ring 27 will press against the wedge-shaped sealing ring 26, so that the wedge-shaped sealing ring 26 is guided and pressed by the pressing groove 28, thereby effectively sealing the disengaging position of the gas conveying pipe 9 and the sealing sleeve 25. Thus, during the conveying of argon into the gas conveying tank 16, the argon will not leak, the gas pressure during the conveying of argon is ensured, continuous argon blowing is ensured, and the quality of the molten steel after operation is improved.

[0043] Optionally, the closing assembly 11 comprises an assembling frame 29 fixed in the gas tank 16, a movable column 30 fixed in the assembling frame 29, a sliding groove 31 opened in the movable column 30, a reset spring 32 fixed in the sliding groove 31, a movable rod 33 slidingly inserted in the sliding groove 31 and fixedly connected with the lower end of the reset spring 32, a closing plate 34 fixed at the bottom of the movable rod 33, two limiting rods 35 symmetrically fixed on the upper surface of the closing plate 34 and movably installed on the assembling frame 29, and a sealing plug 36 fixed on the lower surface of the closing plate 34 and corresponding to the gas inlet groove 18. During the process of placing the ladle body 1 on the ladle car 3, the gas pipe 9 is inserted into the gas inlet groove 18 and pushes the sealing plug 36 to move the closing plate 34 upwards, so that the upper end of the gas pipe 9 enters the gas tank 16, thereby removing the closing of the gas inlet groove 18 of the gas tank 16 by the closing plug, so that the pressure and flow of the argon gas during the argon gas conveying will not change greatly, thereby stably conveying argon gas into the gas tank 16 to ensure the bottom blowing effect of the ladle. When the ladle body 1 is lifted off from the ladle car 3 and stops conveying argon gas, the closing plate 34 and the sealing plug 36 can be pushed down by the reset spring 32 to move the closing plate 34 and the sealing plug 36, so that the sealing plug 36 can block the gas inlet pipe 19, thereby balancing the gas pressure between the gas tank 16 and the two gas permeable bricks 7 and the pressure exerted by the molten steel on the two gas permeable bricks 7, and being in a relatively stable state, preventing the two gas permeable bricks 7 and the gas pipe 8 from being sucked back, reducing the erosion of the gas permeable bricks 7 by the floating slag of the molten steel, ensuring the service life of the gas permeable bricks 7, prolonging the replacement cycle of the gas permeable bricks 7, and effectively reducing the production cost.

[0044] Optionally, the top supporting piece 21 comprises a plurality of guide rods 37 fixed in an annular array on the lower surface of the sealing seat 14 and movably installed on the ladle car 3, and a plurality of top supporting springs 38 movably sleeved outside the plurality of guide rods 37.

[0045] The upper and lower ends of the supporting spring 38 are fixedly connected with the lower surface of the sealing seat 14 and the inner wall of the gas conveying cavity 6, respectively. During the process of placing the ladle body 1 on the ladle car 3, the gas tank 16 is lowered to abut against the sealing seat 14, which pushes the sealing seat 14 to move in the movable groove 13 and ensures the stable and accurate downward movement of the sealing seat 14 under the guidance of the guide rods 37. When the sealing seat 14 moves downward, the supporting springs 38 are compressed, and under the elastic force of the supporting springs 38, the abutment between the sealing seat 14 and the gas tank 16 is stable, which effectively improves the sealing effect of the upper sealing gasket 22 on the abutment between the sealing seat 14 and the gas tank 16. At the same time, after the ladle body 1 is lifted away from the ladle car 3, the sealing seat 14 is reset under the pushing of the supporting springs 38, thereby shielding and closing the gas outlet grooves 20 on the gas conveying pipe 9, avoiding the blockage of the gas outlet grooves 20 by impurities and dust, and affecting the conveying effect of the argon gas.

[0046] Optionally, the positioning assembly 5 comprises two supporting seats 39 fixed symmetrically on the ladle car 3, two control grooves 40 respectively formed in the two supporting seats 39, two positioning blocks 41 respectively arranged in the two control grooves 40, a plurality of positioning rods 42 fixed symmetrically on the outside of the ladle body 1, and a plurality of positioning grooves 43 symmetrically formed on the upper surfaces of the two positioning blocks 41. When the molten steel is poured into the ladle body 1, the ladle body 1 is conveniently lifted and moved to be directly above the ladle car 3 by the ear seat 4. When the ladle body 1 is lifted and moved to abut against the ladle car 3, the positioning rods 42 on the ladle body 1 are clamped into the positioning grooves 43, thereby preliminarily limiting and positioning the position of the ladle body 1, and ensuring the accurate butt joint of the gas conveying pipe 9 and the gas tank 16, avoiding the inaccurate positioning causing the failure of argon blowing.

[0047] Optionally, the positioning assembly 5 further comprises a plurality of extension rods 44 symmetrically fixed to the lower surfaces of the two positioning blocks 41, a plurality of extension grooves 45 symmetrically formed in the two support seats 39 and corresponding to the plurality of extension rods 44, a plurality of control springs 46 movably sleeved outside the plurality of extension rods 44, a plurality of limiting blocks 47 symmetrically fixed in the two control grooves 40, and two limiting grooves 48 symmetrically formed in the two positioning blocks 41 and corresponding to the plurality of limiting blocks 47. After the ladle body 1 is preliminarily positioned by the plurality of positioning rods 42, the two positioning blocks 41 move in the two control grooves 40 under the gravity of the continuously lowered ladle body 1, and the stability and accuracy of the downward movement of the two positioning blocks 41 are ensured by the cooperation of the plurality of limiting blocks 47, the limiting grooves 48, the extension rods 44 and the extension grooves 45, so that the ladle body 1 can be accurately lowered after positioning and placed on the ladle car 3, thereby ensuring that the gas delivery pipe 9 can accurately enter the gas delivery tank 16 through the gas inlet groove 18 when the argon blowing device 10 is working, and avoiding damage to the argon blowing device 10 due to inaccurate positioning of the ladle body 1, which prevents effective argon blowing. When the ladle body 1 is lifted away from the ladle car 3, the plurality of control springs 46 push the two positioning blocks 41 to reset, facilitating accurate positioning and placement of the ladle body 1 next time.

[0048] The above only describes preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A compact ladle casting bottom stirring device, characterized by, It includes a ladle body (1), a plurality of support frames (2) fixed on the lower surface of the ladle body (1), a ladle trolley (3) for placing the ladle body (1), an ear seat (4) fixed on the outside of the ladle body (1), a positioning assembly (5) installed on the upper surface of the ladle trolley (3), a gas conveying cavity (6) arranged on the ladle trolley (3), two gas permeable bricks (7) fixed on the bottom of the ladle body (1), two gas blowing pipes (8) respectively connected with the two gas permeable bricks (7), a gas conveying pipe (9) installed on the bottom of the ladle trolley (3), a argon blowing device (10) installed on the gas conveying cavity (6) and the ladle body (1) and connected with the gas conveying pipe (9) and the two gas blowing pipes (8), and a sealing assembly (11) installed on the ladle body (1) and the argon blowing device (10), wherein The positioning assembly (5) is adapted to limit the movement of the ladle body (1) during the process of placing the ladle body (1) on the ladle trolley (3); The argon blowing device (10) is adapted to convey argon gas from an external gas supply device from the bottom of the ladle body (1) to the inside of the ladle body (1); The sealing assembly (11) is adapted to seal the part of the argon blowing device (10) close to the ladle body (1) when the argon blowing device (10) stops working.

2. The small-sized ladle bottom blowing device according to claim 1, wherein The argon blowing device (10) comprises a control seat (12) fixedly installed in the gas conveying cavity (6), a movable slot (13) opened in the control seat (12), a sealing seat (14) slidingly inserted in the movable slot (13), an installation slot (15) opened in the sealing seat (14), a gas conveying tank (16) fixedly installed on the bottom of the ladle body (1), a sealing ring (17) fixed on the bottom of the gas conveying tank (16), an air inlet slot (18) opened in the bottom of the gas conveying tank (16), two air inlet pipes (19) respectively connected with the two gas blowing pipes (8) at one end and connected with the gas conveying tank (16) at the other end, a plurality of air outlet slots (20) annularly arranged on the outer wall of the upper end of the gas conveying pipe (9), and a jacking piece (21) arranged on the sealing seat (14) and the ladle trolley (3); The upper end of the gas conveying pipe (9) is arranged in the installation slot (15); The diameter of the air inlet slot (18) is greater than the diameter of the gas conveying pipe (9).

3. The small-sized ladle bottom blowing device according to claim 2, wherein ​ The argon blowing device (10) further comprises an upper sealing gasket (22) fixed to the lower surface of the sealing ring (17), an assembly groove (23) opened on the upper surface of the sealing seat (14) and corresponding to the upper sealing gasket (22), a lower sealing gasket (24) fixed in the assembly groove (23), a sealing sleeve (25) movably sleeved outside the gas conveying pipe (9) and fixed in the mounting groove (15), a wedge-shaped sealing ring (26) fixed to the bottom of the sealing sleeve (25), a pressing ring (27) movably sleeved outside the gas conveying pipe (9) and fixed in the gas conveying cavity (6), and a pressing groove (28) opened on the upper surface of the pressing ring (27) and corresponding to the wedge-shaped sealing ring (26).

4. The small-sized ladle bottom blowing device according to claim 3, wherein The sealing assembly (11) comprises an assembly frame (29) fixed in the gas conveying tank (16), a movable column (30) fixed in the assembly frame (29), a sliding groove (31) opened in the movable column (30), a reset spring (32) fixed in the sliding groove (31), a movable rod (33) slidably inserted in the sliding groove (31) and fixedly connected with the lower end of the reset spring (32), a sealing plate (34) fixed to the bottom of the movable rod (33), two limiting rods (35) symmetrically fixed to the upper surface of the sealing plate (34) and movably mounted on the assembly frame (29), and a sealing plug (36) fixed to the lower surface of the sealing plate (34) and corresponding to the gas inlet groove (18).

5. The small-sized ladle bottom blowing device according to claim 4, wherein The top support (21) comprises a plurality of guide rods (37) fixed in an annular array on the lower surface of the sealing seat (14) and movably mounted on the ladle car (3), and a plurality of top support springs (38) movably sleeved outside the guide rods (37); The upper and lower ends of the top support spring (38) are fixedly connected with the lower surface of the sealing seat (14) and the inner wall of the gas conveying cavity (6), respectively.

6. The small-sized ladle bottom blowing device according to claim 1, wherein The positioning assembly (5) comprises two support seats (39) symmetrically fixed to the ladle car (3), two control grooves (40) respectively opened on the two support seats (39), two positioning blocks (41) respectively arranged in the two control grooves (40), a plurality of positioning rods (42) symmetrically fixed to the outside of the ladle body (1), and a plurality of positioning grooves (43) symmetrically opened on the upper surfaces of the two positioning blocks (41).

7. The small-sized ladle bottom blowing device according to claim 6, wherein The positioning assembly (5) further comprises a plurality of extension rods (44) symmetrically fixed to the lower surfaces of the two positioning blocks (41), a plurality of extension grooves (45) symmetrically formed in the two support seats (39) and corresponding to the plurality of extension rods (44), a plurality of control springs (46) movably sleeved outside the plurality of extension rods (44), a plurality of limiting blocks (47) symmetrically fixed in the two control grooves (40), and two limiting grooves (48) symmetrically formed in the two positioning blocks (41) and corresponding to the plurality of limiting blocks (47).

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