Casting protection device for steel casting

Abstract

The invention discloses a steel casting pouring protection device, which belongs to the technical field of steel ladle pouring equipment and comprises a steel ladle with a pouring hole in the bottom. The moving plate is provided with a water outlet pipe and is connected with a driving assembly for driving the moving plate to move between a first position and a second position; at the first position, the movable plate blocks the pouring hole; at the second position, the pouring hole is communicated with the water outlet pipe, and the lower end of the water outlet pipe is positioned right above the pouring cup; the first protection plate is fixed on the movable plate; the first protection plate separates the moving plate and the driving assembly from the lower end of the water outlet pipe and the sprue cup; the argon protection ring is positioned between the first protection plate and the pouring cup; a plurality of gas outlet holes and a gas inlet pipeline are arranged on the argon protection ring; the first protection plate not only can block the moving plate and the driving assembly from the lower end of the water outlet pipe and the pouring cup to prevent molten steel from influencing the driving assembly, but also can be matched with an argon protection ring to improve the sealing performance during molten steel pouring, and the molten steel is prevented from being oxidized when making contact with air.

Description

Technical Field

[0001] The invention relates to the technical field of ladle pouring equipment, and in particular to a casting protection device. Background Art

[0002] Compared with other steel castings, low oxygen steel castings have the advantages of low oxygen content, few inclusions, and dense structure. In addition, low oxygen steel castings have obvious advantages in quality, performance and manufacturing cost. They have very broad application prospects in the field of high-end steel castings, such as supercritical / ultra-supercritical gas turbines, hydropower and other industries.

[0003] When producing low-oxygen steel castings, attention should be paid to the deoxidation of molten steel during smelting. Usually, inert gas (usually argon) is used during pouring to prevent oxidation of molten steel. A Chinese patent application (publication number: CN105033230A) discloses an oxygen-free pouring device in which an inert gas is used to protect the iron from being tapped by a gas pressure casting furnace. An annular injector for spraying an inert gas flow is fixed to the bottom of the shell of the iron outlet of the gas pressure casting furnace. There is a gap between the annular injector and the casting cup in the technical solution. It is difficult to ensure full airtightness during molten steel pouring by only spraying inert gas. Air will still come into contact with the molten steel, and This technical solution does not have a control structure for controlling the pouring switch, and its pouring process is difficult to control accurately; the Chinese patent application (publication number: CN212945401U) discloses a pouring protection device, in which inert gas is loaded through a placement clamp ring, and the placement clamp ring is arranged on the pouring protection device body, and the pouring protection device body is located between the ladle and the casting box. When this technical solution is in use, there will be gaps between the pouring protection device body and the pouring port and the casting port respectively. The inert gas sprayed by the placement clamp ring cannot achieve the effect of completely isolating the air, and air will still come into contact with the molten steel, causing the molten steel to be oxidized.

[0004] In addition, since the weight of molten steel required for pouring low-oxygen steel castings is usually large, in order to prevent slag and inclusions floating on the surface of the molten steel from entering the casting during pouring, the ladle mainly uses the bottom pouring method, that is, a pouring hole is set at the bottom of the ladle, and a control structure for controlling its switch is usually required at the pouring hole. Since the molten steel temperature is high and the splashing is large during pouring, the control structure is easily subjected to high-temperature radiation and erosion by the splashing of molten steel, causing the control structure to fail and the pouring hole to be unable to be closed, leading to major safety accidents such as molten steel leakage.

[0005] Therefore, it is an urgent problem to be solved at this stage to develop and design a low-oxygen argon protection pouring device for steel castings with good air isolation effect, high safety factor, controllable pouring, less molten steel splashing, and the ability to reduce quality problems such as sand inclusion and impurities in castings. Summary of the invention

[0006] In response to the problems existing in the prior art, the present invention provides a casting protection device for steel castings. By utilizing a first protective plate arranged on a movable plate, not only can the movable plate, a driving component, and the lower end of a water outlet pipe and a pouring cup be blocked, thereby preventing the high temperature and splashing of molten steel from causing radiation and erosion to the driving component, thereby increasing the service life of the driving component and having a high safety factor; moreover, the first protective plate can more conveniently cooperate with an argon protection ring, thereby improving the airtightness during molten steel pouring, preventing the molten steel from being oxidized by contact with air, and achieving pure pouring.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows: The present invention provides a casting protection device for steel castings, comprising: A ladle, wherein a pouring hole is provided at the bottom of the ladle; A movable plate, the movable plate is located below the pouring hole, a water outlet pipe is provided on the movable plate, and the movable plate is connected to a driving assembly for driving the movable plate to move between a first position and a second position; when in the first position, the movable plate blocks the pouring hole; when in the second position, the pouring hole is connected to the water outlet pipe; pouring cup; when the movable plate moves to the second position, the lower end of the water outlet pipe is located directly above the pouring cup; A first protective plate, the first protective plate is fixed parallel to the bottom of the movable plate, the edges of the first protective plate extend along the moving direction of the movable plate, and the water outlet pipe passes through the first protective plate; during pouring, the first protective plate separates the movable plate and one side of the driving assembly from the lower end of the water outlet pipe and one side of the pouring cup; An argon protection ring, wherein the argon protection ring is located between the first protective plate and the pouring cup; a plurality of air outlet holes are arranged on the inner wall surface of the argon protection ring, and an air inlet pipe connected to the air outlet holes is arranged on the argon protection ring; during pouring, the lower end of the water outlet pipe is located inside the argon protection ring.

[0008] As a preferred technical solution, a plurality of vertically arranged baffles are provided on the lower surface of the first protective plate, and the plurality of baffles are spliced ​​together to surround and block the portion of the lower end of the water outlet pipe protruding from the first protective plate in the vertical direction.

[0009] As a preferred technical solution, the movable plate and the first protective plate are both arranged horizontally, and the movable plate moves in the horizontal direction; when the movable plate moves to the second position, the axes of the pouring hole, the water outlet pipe, the argon protection ring and the pouring cup are all arranged vertically and in a collinear line; And / or, the plurality of gas outlet holes are evenly distributed along the circumference of the inner wall of the argon protection ring; And / or, during pouring, the lower end of the water outlet pipe is at the same height as the air outlet.

[0010] As a preferred technical solution, the movable plate and the first protective plate are fixedly connected via a plurality of first connecting pins.

[0011] As a preferred technical solution, the argon protection ring is fixed on the first protection plate; Alternatively, the argon protection ring is fixed on the pouring cup.

[0012] As a preferred technical solution, it also includes a second protective plate, which is located below the baffle and fixedly connected to the ladle; a long hole is provided on the second protective plate, and the lower end of the water outlet pipe passes through the long hole; during pouring, the second protective plate separates the first protective plate, one side of the drive assembly from the lower end of the water outlet pipe and one side of the pouring cup; the argon protection ring is fixed on the second protective plate, and the long hole is located inside the argon protection ring.

[0013] As a preferred technical solution, the length direction of the long hole is consistent with the moving direction of the moving plate; And / or, the second protective plate is arranged horizontally; And / or, the upper surface of the second protective plate is gap-matched with the lower edge of the baffle; And / or, during pouring, the lower edge of the argon protection ring is lower than the upper edge of the pouring cup, and the upper edge of the pouring cup is located inside the argon protection ring.

[0014] As a preferred technical solution, a fixed plate is provided at the bottom of the ladle, a through hole is provided on the fixed plate, and the through hole is connected to the pouring hole; a connecting frame is provided on the fixed plate, and the connecting frame is fixedly connected to the second protective plate by a plurality of second connecting pins.

[0015] As a preferred technical solution, two guide posts are provided on the bottom surface of the fixed plate, both ends of the guide posts are fixedly connected to the connecting frame, and the guide posts are provided with guide blocks that can move along them; the movable plate is located between the two guide posts and fixedly connected to the guide blocks; And / or, a step surface is provided on the fixed plate at a position corresponding to the movable plate, and the movable plate is slidably connected to the step surface.

[0016] As a preferred technical solution, the drive assembly is configured as a hydraulic mechanism.

[0017] The beneficial effects of the present invention are as follows: 1. The present invention utilizes a first protective plate arranged on the movable plate, which can not only isolate the movable plate, the driving component from the lower end of the water outlet pipe and the pouring cup, but also prevent the high temperature and splashing of the molten steel from causing radiation and erosion to the driving component, thereby increasing the service life of the driving component and having a high safety factor; moreover, the first protective plate can be more conveniently matched with the argon protection ring, thereby improving the airtightness during molten steel pouring, preventing the molten steel from being oxidized by contact with the air, and realizing pure pouring.

[0018] 2. The argon protection ring of the present invention can be fixed on the first protection plate or the pouring cup according to actual usage. Since the diameter of the pouring hole used when pouring the cast steel is large, the molten steel splashes severely at the moment of pouring. If the protection is not good, it will cause scalding to the surrounding personnel. The argon protection ring can effectively block the splashing of molten steel, will not harm the surrounding personnel, and is easy to install and produce.

[0019] 3. The present invention utilizes a second protective plate fixed on the ladle, which cooperates with the first protective plate for protection, and only the lower end of the water outlet protrudes from the long strip hole, which can further prevent the high temperature and splashing of the molten steel from causing radiation and erosion to the driving components at the bottom of the ladle; the argon protection ring is fixed on the second protective plate. During pouring, the argon protection ring can wrap the pouring cup to achieve physical isolation from the air, and can also make the inside of the pouring cup slightly positive by blowing argon, effectively preventing the molten steel from contacting the air and achieving pure pouring. In the actual production process, the pouring oxygen increase amount does not exceed 5ppm, and the argon protection ring can further block the splashing of the molten steel and will not harm the pouring personnel; at the same time, the first protective plate, the second protective plate and the argon protection ring are all installed on the ladle, and there is no need to install and debug on the workpiece to be poured, which avoids the sand and other debris from entering the workpiece to be poured during installation and debugging to form sand inclusions, and the present invention only needs to be installed once during the service life of the molten steel in the ladle, without considering the number of workpieces to be poured, the production cost is low, the workload of the operator is greatly reduced, and the man-hours are reduced.

[0020] 4. The present invention requires less tooling, less labor for installation, and low cost.

[0021] 5. The pouring operation of the present invention is simple. During the installation process of the first protective plate, the second protective plate and the argon protection ring, it can be ensured that when the movable plate moves to the second position, the axis of the water outlet pipe and the pouring cup are in line; during the pouring process, it is no longer necessary to specifically confirm whether the water outlet pipe and the pouring cup are concentric. It is only necessary to cover the pouring cup from above with the argon protection ring. The operation is simple and the time is shorter. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a first embodiment of a casting protection device for steel castings of the present invention; Figure 2 for Figure 1 A magnified image of area A; Figure 3 It is a schematic diagram of the overall structure of a second embodiment of a casting protection device for steel castings of the present invention; Figure 4 for Figure 3 Enlarged view of area B; Figure 5 It is a schematic diagram of the overall structure of a third embodiment of a casting protection device for steel castings of the present invention; Figure 6 for Figure 5 Enlarged view of the middle C area; Figure 7 for Figure 5 A schematic diagram of the structure of the bottom of the ladle; Figure 8 for Figure 7 Enlarged view of area D in the middle; Fig. 9 for Figure 7 Schematic diagram of the structure after hiding the first protective plate and the argon protective ring; Fig.10 for Fig. 9 Magnified view of area E in the middle.

[0023] In the figure: 1- ladle, 11- pouring hole, 2- movable plate, 21- water outlet pipe, 22- driving assembly, 23- first connecting pin, 24- guide block, 25- movable kit, 26- guide seat, 3- workpiece to be poured, 31- pouring cup, 4- first protective plate, 41- baffle, 42- fixed support, 5- argon protection ring, 51- air outlet, 52- air inlet pipe, 6- second protective plate, 61- long hole, 7- fixed plate, 71- through hole, 72- connecting frame, 73- second connecting pin, 74- guide column, 75- connecting plate. DETAILED DESCRIPTION

[0024] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings. Embodiment 1

[0025] Please refer to Figure 1 and Figure 2 , is an embodiment of a casting protection device provided by the present invention, comprising a ladle 1 with a pouring hole 11 at the bottom, the molten steel in the ladle 1 can flow out from the pouring hole 11 at the bottom, to prevent slag and inclusions floating on the surface of the molten steel from entering the pouring cup 31 during pouring, specifically, the pouring cup 31 is arranged on the workpiece 3 to be poured, and the workpiece 3 to be poured has a pouring cavity connected to the pouring cup 31 inside, during pouring, the molten steel flows out from the pouring hole 11 and falls into the pouring cup 31 and then flows into the pouring cavity; The movable plate 2 is located below the pouring hole 11, and a water outlet pipe 21 is provided on the movable plate 2. The movable plate 2 is connected to a driving assembly 22 for driving the movable plate 2 to move between a first position and a second position. When in the first position, the pouring hole 11 is in a closed state, and the movable plate 2 blocks the pouring hole 11, so that the molten steel cannot flow out. When in the second position, the pouring hole 11 is in an open state, and the pouring hole 11 is connected to the water outlet pipe 21. The lower end of the water outlet pipe 21 is located directly above the pouring cup 31, and the molten steel flows out of the water outlet pipe 21 and falls into the pouring cup 31 to realize pouring. The pouring switch can be controlled by the driving assembly 22. In order to prevent the high temperature and splashing of molten steel from causing radiation and erosion to the drive assembly 22, a first protective plate 4 is arranged in parallel below the movable plate 2, and the water outlet pipe 21 passes through the first protective plate 4. The edges of the first protective plate 4 extend outward along the moving direction of the movable plate 2. During pouring, the first protective plate 4 separates the movable plate 2 and one side of the drive assembly 22 from the lower end of the water outlet pipe 21 and one side of the pouring cup 31, thereby preventing the drive assembly 22 from being affected, thereby increasing the service life of the drive assembly 22 and having a high safety factor. At the same time, in order to prevent the oxidation of molten steel, an argon protection ring 5 is fixed under the first protective plate 4. A plurality of air outlet holes 51 are arranged on the inner wall surface of the argon protection ring 5, and an air inlet pipe 52 is arranged on the outer wall of the argon protection ring 5. The interior of the argon protection ring 5 has a passage connecting the air outlet holes 51 with the air inlet pipe 52, so that argon can continuously pass through the air inlet pipe 52 and be ejected from the air outlet holes 51. During pouring, the lower end of the water outlet pipe 21 is located in the argon protection ring 5, and the continuously ejected argon forms an "air curtain" at the outlet of the molten steel from the lower end of the water outlet pipe 21, which can effectively prevent the molten steel from being oxidized by contact with the air.

[0026] In this embodiment, please refer to Figure 1 and Figure 2 The movable plate 2, the first protective plate 4 and the argon protection ring 5 are all arranged at the bottom of the ladle 1 and move with the ladle 1. When pouring multiple boxes of workpieces, pouring can be achieved by directly following the ladle 1 and moving to each pouring cup 31 in turn, which can simplify the preparation work of the pouring personnel; during the pouring process, the molten steel is only isolated from the air by the "air curtain" formed by argon. When the argon is actually blown, the "air curtain" is affected by the environment and the blowing direction / flow rate of argon, and the shielding effect of the splashing of the molten steel is also poor. The splashing cold steel is easy to enter the workpiece 3 to be poured from the open riser of the pouring cup 31 to form inclusions.

[0027] For clarification, please refer to Figure 2The driving component 22 is preferably configured as a hydraulic mechanism, which is fixedly connected to the movable plate 2 and the water outlet pipe 21 respectively through the movable kit 25. The movable plate 2 and the water outlet pipe 21 can move smoothly between the first position and the second position under the drive of the hydraulic mechanism, thereby controlling the switch of the pouring hole 11; in other embodiments, the driving component 22 can also be an electric cylinder or a pneumatic cylinder, whichever is more capable of driving the movable plate 2 to move.

[0028] In this embodiment, please refer to Figure 1 and Figure 2 A plurality of vertically arranged baffles 41 are preferably provided on the lower surface of the first protective plate 4. The plurality of baffles 41 are spliced ​​together to surround and block the portion of the lower end of the water outlet pipe 21 protruding from the first protective plate 4, which can prevent molten steel from splashing in the vertical direction while also improving the isolation effect on the drive assembly 22.

[0029] For details, please refer to Figure 1 and Figure 2 , the movable plate 2 and the first protective plate 4 should be set horizontally, and the movable plate 2 should move in the horizontal direction to facilitate installation and ensure the stability of the switch control of the pouring hole 11 when the movable plate 2 moves; at the same time, the baffle 41 should be set vertically, which is convenient for installation and can improve the isolation effect; further, the axes of the pouring hole 11, the water outlet pipe 21, the argon protection ring 5 and the pouring cup 31 should be set vertically to ensure that the molten steel falls smoothly; when the movable plate 2 moves to the second position for pouring, the axes of the pouring hole 11, the water outlet pipe 21, the argon protection ring 5 and the pouring cup 31 are all set vertically and in line to minimize the splashing generated when the molten steel falls into the pouring cup 31.

[0030] In this embodiment, please refer to Figure 1 and Figure 2 During pouring, the lower end of the water outlet pipe 21 is at the same height as the air outlet hole 51, and the argon gas sprayed from the argon protection ring 5 directly forms an "air curtain" at the molten steel flowing out of the lower end of the water outlet pipe 21, which can achieve the best air isolation effect.

[0031] Furthermore, in order to ensure the isolation effect of the argon gas ejected from the argon protection ring 5 , the plurality of gas outlet holes 51 are preferably evenly distributed along the circumference of the inner wall of the argon protection ring 5 .

[0032] In this embodiment, please refer to Figure 1 and Figure 2 The movable plate 2 and the first protective plate 4 are preferably fixedly connected by a plurality of first connecting pins 23; in other embodiments, the movable plate 2 and the first protective plate 4 can be fixedly connected by bolts or welding, so as to stably connect the movable plate 2 and the first protective plate 4. Embodiment 2

[0033] Please refer to Figure 3 and Figure 4 The main difference between this embodiment and the first embodiment is that the argon protection ring 5 is fixed on the pouring cup 31. Before pouring, the first protection plate 4 does not contact the argon protection ring 5. When pouring starts, the first protection plate 4 is dropped onto the argon protection ring 5 to form a closed space, or a small gap is left. The argon protection ring 5 sprays argon to keep the inside of the pouring cup 31 where the molten steel is exposed in a state of slight positive pressure, which can prevent air from contacting the molten steel.

[0034] This embodiment has good sealing performance and can effectively shield the splash of molten steel. However, an argon protection ring 5 needs to be installed on the pouring cup 31 of each workpiece 3 to be poured. When installing the argon protection ring 5, loose sand, dust and other debris are likely to enter the pouring system to form inclusions. Moreover, during the period when the ladle 1 falls and the pouring just starts, the gap between the argon protection ring 5 and the first protective plate 4 will still cause air to contact with the molten steel.

[0035] In addition, in the first and second embodiments, please refer to Figure 1-Figure 4 , the movable plate 2 realizes the opening and closing of the pouring hole 11 by moving between the first position and the second position, and the first protective plate 4 moves synchronously with the movable plate 2; during pouring, in order to avoid splashing of molten steel and ensure that the argon gas sprayed by the argon protection ring 5 can effectively prevent the molten steel from contacting with the air, the lower end of the water outlet pipe 21 needs to extend into the argon protection ring 5; therefore, there will be a problem of motion interference between the argon protection ring 5 and the pouring cup 31 or between the argon protection ring 5 and the first protective plate 4. In order to avoid interference, the argon protection ring 5 and the pouring cup 31 or between the argon protection ring 5 and the first protective plate 4 cannot be in direct contact, so that it is difficult to form a fully enclosed environment at the pouring cup 31; in other embodiments, the first protective plate 4 can also be directly set to be fixedly connected to the ladle 1, which requires a sufficiently large hole to be set on the first protective plate 4 so as not to interfere with the movement of the water outlet pipe 21 with the movable plate 2. At this time, the hole on the first protective plate 4 will be directly affected by the high temperature and splashing of the molten steel, and the protective effect on the drive component 22 will be lost. Embodiment 3

[0036] Please refer to Figure 5-Figure 10The difference between this embodiment and the first embodiment mainly lies in that: it also includes a second protective plate 6 fixedly connected to the ladle 1, and the second protective plate 6 is located below the baffle 41; the second protective plate 6 is provided with a long hole 61, and the lower end of the water outlet pipe 21 passes through the long hole 61; the argon protection ring 5 is fixed on the second protective plate 6, and the long hole 61 is located inside the argon protection ring 5; during pouring, the second protective plate 6 and the argon protection ring 5 cooperate to separate the first protective plate 4 and one side of the drive assembly 22 from the lower end of the water outlet pipe 21 and one side of the pouring cup 31, and the second protective plate 6 and the first protective plate 4 form a double-layer protection scheme. At the same time, the argon protection ring 5 and the second protective plate 6 are integrated into one, which not only solves the problem of insufficient sealing, but also has the advantage of shielding molten steel splashing, and can be suitable for the production of steel castings with high production quality requirements, complex working conditions, and non-fixed casting size and shape.

[0037] For clarification, please refer to Figure 5-Figure 10 The second protective plate 6 should be arranged horizontally to facilitate cooperation with the first protective plate 4 and the argon protection ring 5 and facilitate installation.

[0038] In this embodiment, please refer to Figure 7 and Figure 8 , the length direction of the long hole 61 should be consistent with the moving direction of the movable plate 2. When the movable plate 2 is in the first position, the water outlet pipe 21 is located at one end of the long hole 61; when the movable plate 2 is in the second position, the water outlet pipe 21 is located at the other end of the long hole 61; when the movable plate 2 moves, the water outlet pipe 21 and the long hole 61 are gap-matched, and the upper surface of the second protective plate 6 and the lower edge of the baffle 41 are gap-matched to ensure that the second protective plate 6 will not interfere with the movement of the movable plate 2; further, the long hole 61 is always located inside the area surrounded by several baffles 41. During pouring, the first protective plate 4 and the baffle 41 can block the splashing molten steel and the high temperature of the molten steel passing through the long hole 61. The first protective plate 4, the baffle 41 and the second protective plate 6 cooperate with each other to ensure that the driving component 22 will not be affected by the molten steel.

[0039] For clarification, please refer to Figure 5 and Figure 6 During pouring, the lower edge of the argon protection ring 5 should be lower than the upper edge of the pouring cup 31, and the upper edge of the pouring cup 31 is located inside the argon protection ring 5. The argon protection ring 5 and the pouring cup 31 are clearance-matched. The argon protection ring 5 wraps the pouring cup 31 to achieve physical isolation from the air. The argon protection ring 5 sprays argon to put the inside of the pouring cup 31 in a state of slightly positive pressure, effectively preventing air from contacting the molten steel.

[0040] In this embodiment, please refer to Figure 5-Figure 10, the fixing plate 7 is welded to the bottom of the ladle 1; a through hole 71 is provided on the fixing plate 7, and the through hole 71 is connected to the pouring hole 11; a connecting frame 72 is provided on the fixing plate 7, and the connecting frame 72 and the second protective plate 6 are fixedly connected by a plurality of second connecting pins 73 to fix the second protective plate 6 on the ladle 1; in other embodiments, the connecting frame 72 and the second protective plate 6 can also be fixedly connected by bolts, so that the second protective plate 6 can be conveniently fixed on the connecting frame 72.

[0041] For further information, please refer to Figure 7-Figure 10 , two guide posts 74 are provided on the connecting frame 72, and guide blocks 24 that can move along the guide posts 74 are provided on the guide posts 74; the movable plate 2 is located between the two guide posts 74, and the guide blocks 24 are fixedly connected to the movable plate 2, and the extending direction of the guide posts 74 is the direction from the first position to the second position, and the guide posts 74 can guide the movable plate 2 to move stably between the first position and the second position; specifically, a guide seat 26 integrally formed with the fixed plate 7 is provided on the fixed plate 7, and the guide seat 26 is used to provide installation positioning and guidance for the guide posts 74 and the guide blocks 24; one end of the connecting plate 75 is opened The hole is fixed to the guide seat 26 through the guide column 72, and the other end of the connecting plate 75 is fixedly connected to the connecting frame 72. There are four connecting plates 75, which are respectively located on both sides of the movable plate 2 and at both ends of the guide column 74; the end of the guide column 74 is provided with an external thread, which is threadedly connected to the internal thread on the fixed support 42 on both sides of the first protective plate 4; in addition, in other embodiments, the guide column 74 can also be integrally connected to the movable plate 2, the guide block 24 is fixed to the fixed plate 7, and the guide column 74 is penetrated through the through hole of the guide block 24 to slide with the movable plate 2, which will not be repeated here.

[0042] It should be noted that a step surface is preferably provided at the position of the fixed plate 7 corresponding to the movable plate 2. The step surface has the same extension direction as the guide column 74. The movable plate 2 is slidably connected to the step surface. The step surface can limit the position of the movable plate 2 in the vertical direction, thereby ensuring that the movable plate 2 moves stably in the horizontal direction.

[0043] Please refer to Figure 5-Figure 10 The specific installation and use process of this embodiment is as follows: Install the first protective plate 4, the size of which should be sufficient to protect the driving assembly 22 during the movement of the movable plate 2; an assembly hole is provided on the first protective plate 4 and the movable plate 2 is fixed by the first connecting pin 23, and a baffle 41 is provided on the lower surface of the first protective plate 4 surrounding the water outlet pipe 21; Install the fixed plate 7, align the through hole 71 on the fixed plate 7 with the pouring hole 11 at the bottom of the ladle 1, and then weld the fixed plate 7 to the bottom of the ladle 1. The size of the fixed plate 7 should be able to cover the entire driving assembly 22, so as to protect the driving assembly 22; install the connecting frame 72 on the fixed plate 7, the guide block 24 is fixedly connected to the movable plate 2, and the movable plate 2 is slidably connected to the step surface, so that the movable plate 2 can stably move between the first position and the second position; and when the movable plate 2 is in the second position, the water outlet pipe 21 on the movable plate 2 is connected to the pouring hole 11; start the driving assembly 22, control the movable plate 2 to move between the first position and the second position so that the pouring hole 11 is repeatedly opened and closed, and verify the protection area of ​​the first protective plate 4 and whether the first protective plate 4 interferes with the driving assembly 22; Move the movable plate 2 to the second position, determine the axis of the water outlet pipe 21 during pouring; install the second protective plate 6, make the water outlet pipe 21 pass through the long hole 61, and fix the argon protection ring 5 on the lower surface of the second protective plate 6. After the axis of the argon protection ring 5 coincides with the axis of the water outlet pipe 21, open assembly holes at the four corners of the second protective plate 6 and fix them to the connecting frame 72 through the second connecting pin 73. The highest point of the second connecting pin 73 should be lower than the lowest point of the first protective plate 4 to avoid interference; there is a small gap between the second protective plate 6 and the lower edge of the baffle 41, and no interference will occur. At the same time, the first protective plate 4, the baffle 41 and the second protective plate 6 can effectively block the high temperature and splashing of molten steel; Connect the air inlet pipe 52 to the argon gas source, and before pouring, confirm that the argon protection ring 5 is blowing normally; hang the ladle 1 above the workpiece 3 to be poured, adjust the position of the ladle 1 so that the argon protection ring 5 wraps the pouring cup 31, and then let the ladle 1 fall a certain distance (the falling height cannot interfere with the pouring cup 31), so that the argon protection ring 5 and the pouring cup 31 form a closed space, open the argon protection ring 5, form a slightly positive pressure environment in the pouring cup 31, exhaust air, and prevent the molten steel from being oxidized; after the argon protection ring 5 has been blowing argon for a certain period of time, the movable plate 2 moves to the second position and pouring can begin; after the pouring is completed, the argon protection ring 5 stops blowing argon.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A casting protection device for steel castings, characterized in that: include: A ladle (1), wherein a pouring hole (11) is provided at the bottom of the ladle (1); a movable plate (2), the movable plate (2) being located below the pouring hole (11), the movable plate (2) being provided with a water outlet pipe (21), the movable plate (2) being connected to a driving component (22) for driving the movable plate (2) to move between a first position and a second position; when in the first position, the movable plate (2) blocks the pouring hole (11); when in the second position, the pouring hole (11) is in communication with the water outlet pipe (21); pouring cup (31); when the movable plate (2) moves to the second position, the lower end of the water outlet pipe (21) is located directly above the pouring cup (31); a first protective plate (4), the first protective plate (4) being fixed parallel to the bottom of the movable plate (2), the edges of the first protective plate (4) extending along the moving direction of the movable plate (2), and the water outlet pipe (21) passing through the first protective plate (4); during pouring, the first protective plate (4) separates the movable plate (2) and one side of the drive assembly (22) from the lower end of the water outlet pipe (21) and one side of the pouring cup (31); An argon protection ring (5), the argon protection ring (5) being located between the first protection plate (4) and the pouring cup (31); a plurality of air outlet holes (51) being provided on the inner wall surface of the argon protection ring (5); an air inlet pipe (52) being connected to the air outlet holes (51) being provided on the argon protection ring (5); and during pouring, the lower end of the water outlet pipe (21) is located inside the argon protection ring (5).

2. A casting protection device for steel castings according to claim 1, characterized in that: A plurality of vertically arranged baffles (41) are provided on the lower surface of the first protective plate (4), and the plurality of baffles (41) are spliced ​​together to surround and block the portion of the lower end of the water outlet pipe (21) protruding from the first protective plate (4) in the vertical direction.

3. A casting protection device for steel castings according to claim 2, characterized in that: The movable plate (2) and the first protective plate (4) are both arranged horizontally, and the movable plate (2) moves in a horizontal direction; when the movable plate (2) moves to the second position, the axes of the pouring hole (11), the water outlet pipe (21), the argon protection ring (5) and the pouring cup (31) are all arranged vertically and in a collinear relationship; And / or, the plurality of gas outlet holes (51) are evenly distributed along the circumference of the inner wall of the argon protection ring (5); And / or, during pouring, the lower end of the water outlet pipe (21) and the air outlet hole (51) are at the same height.

4. A casting protection device for steel castings according to claim 1 or 2, characterized in that: The movable plate (2) and the first protective plate (4) are fixedly connected via a plurality of first connecting pins (23).

5. A casting protection device for steel castings according to claim 1 or 2, characterized in that: The argon protection ring (5) is fixed on the first protection plate (4); Alternatively, the argon protection ring (5) is fixed on the pouring cup (31).

6. A casting protection device for steel castings according to claim 2, characterized in that: The steel ladle (1) further comprises a second protective plate (6), the second protective plate (6) being located below the baffle plate (41) and fixedly connected to the ladle (1); the second protective plate (6) being provided with an elongated hole (61), through which the lower end of the water outlet pipe (21) passes; during pouring, the second protective plate (6) separates the first protective plate (4) and one side of the drive assembly (22) from the lower end of the water outlet pipe (21) and one side of the pouring cup (31); the argon protection ring (5) is fixed on the second protective plate (6), and the elongated hole (61) is located inside the argon protection ring (5).

7. A casting protection device for steel castings according to claim 6, characterized in that: The length direction of the long hole (61) is consistent with the moving direction of the moving plate (2); And / or, the second protective plate (6) is arranged horizontally; and / or, the upper surface of the second protective plate (6) is gap-matched with the lower edge of the baffle (41); And / or, during pouring, the lower edge of the argon protection ring (5) is lower than the upper edge of the pouring cup (31), and the upper edge of the pouring cup (31) is located inside the argon protection ring (5).

8. A casting protection device for steel castings according to claim 6, characterized in that: The bottom of the ladle (1) is provided with a fixing plate (7), the fixing plate (7) is provided with a through hole (71), and the through hole (71) is connected to the pouring hole (11); the fixing plate (7) is provided with a connecting frame (72), and the connecting frame (72) and the second protective plate (6) are fixedly connected via a plurality of second connecting pins (73).

9. A casting protection device for steel castings according to claim 8, characterized in that: Two guide columns (74) are provided on the bottom surface of the fixed plate (7), both ends of the guide columns (74) are fixedly connected to the connecting frame (72), and the guide columns (74) are provided with guide blocks (24) that can move along the guide columns; the movable plate (2) is located between the two guide columns (74) and is fixedly connected to the guide blocks (24); And / or, a step surface is provided on the fixed plate (7) at a position corresponding to the movable plate (2), and the movable plate (2) is slidably connected to the step surface.

10. A casting protection device for steel castings according to claim 1, characterized in that: The driving component (22) is configured as a hydraulic mechanism.

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