Molten metal hoisting and pouring device and using method

Abstract

The invention discloses a molten metal hoisting and pouring device and a using method, and belongs to the technical field of casting equipment. The molten metal lifting and pouring device comprises a lifting assembly, a pouring ladle and an inert gas protection system. The inert gas protection system is arranged on the casting ladle and carries out inert gas protection on molten metal in the casting ladle, the casting ladle is in transmission connection with the hoisting assembly, the hoisting assembly is in transmission connection with the external casting crane, the external casting crane drives the hoisting assembly to move, and the hoisting assembly moves to drive the casting ladle to move; the inert gas protection system comprises a ventilation ring and a gas inlet pipe; the ventilation ring is arranged at an opening of the casting ladle, and the air inlet pipe is arranged on the outer side of the ventilation ring and communicates with the ventilation ring to form an air path. At least one circle of air outlet holes are formed in the inner ring of the ventilation ring, and the air outlet holes are formed in the inner ring of the ventilation ring at equal intervals in an annular array mode.

Description

Technical Field

[0001] The invention relates to a molten metal lifting and pouring device and a use method thereof. Background Art

[0002] The transfer and pouring of molten metal is an indispensable part of the foundry industry, especially for casting manufacturers and small smelting laboratories. This process not only directly affects the quality and production efficiency of the product, but also the safety of the operation. At present, the main problem in the market is that within the pouring volume range of 50-200Kg, companies need to flexibly respond to the pouring needs of different materials, capacities and multiple varieties. However, traditional solutions often find it difficult to meet these requirements at the same time.

[0003] In the case of small-scale pouring (<50Kg), the manual ladle lifting method is widely used due to its flexibility. However, when the pouring volume reaches or exceeds 50Kg, the disadvantages of this method gradually emerge. First, the labor intensity increases significantly, and usually more than four workers are required to work together, which not only increases labor costs, but may also cause congestion on site and increase safety hazards.

[0004] In order to overcome the above problems, some automated equipment has appeared on the market, such as the molten iron pouring robot mentioned in the patent CN108580861A. This type of equipment achieves accurate pouring of molten metal through a cantilever structure, but it also exposes some limitations in practical applications. For example, for those easily oxidized metal materials, such as cast steel and aluminum alloy, impurities are easily mixed into these molten metals during the process of being taken out of the furnace, transported, poured, and during these processes. In addition, oxygen and moisture in the air are also easy to oxidize or pollute the molten metal, thereby affecting product quality.

[0005] Therefore, the present invention provides a molten metal lifting and pouring device and a method of use to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a molten metal lifting and pouring device and a method of use to solve the technical problems mentioned in the above background technology.

[0007] The technical solution for achieving the purpose of the present invention is:

[0008] A molten metal lifting and pouring device comprises a lifting assembly, a ladle and an inert gas protection system; the inert gas protection system is arranged on the ladle to provide inert gas protection to the molten metal in the ladle; the ladle is transmission-connected to the lifting assembly, the lifting assembly is transmission-connected to an external pouring crane, the external pouring crane drives the lifting assembly to move, and the movement of the lifting assembly drives the movement of the ladle.

[0009] Furthermore, the inert gas protection system includes a ventilation ring and an air inlet pipe; the ventilation ring is arranged at the opening of the ladle, and the air inlet pipe is arranged on the outside of the ventilation ring and is interconnected with the ventilation ring to form an air path; at least one circle of air outlet holes is provided on the inner circle of the ventilation ring.

[0010] Furthermore, the inner ring of the ventilation ring is provided with at least two circles of air outlet holes, each circle of air outlet holes is arranged in a circular array at equal intervals on the inner ring of the ventilation ring, and the upper side and the lower side of the inner ring of the ventilation ring are respectively provided with at least one circle of air outlet holes.

[0011] Furthermore, the lifting assembly includes a lifting tool and a pouring handle; the lifting tool is transmission-connected to the external pouring crane, and the pouring handle is transmission-connected to the lifting tool; two pouring handles are provided, and the two pouring handles are symmetrically arranged on both sides of the ladle and fixedly connected to the ladle. The external pouring crane drives the lifting tool to move, and the movement of the lifting tool drives the pouring handle to move, thereby driving the ladle to move.

[0012] Furthermore, the overall structure of the lifting tool is in a "Π" shape, including a crossbeam and two lifting handles; the two lifting handles are perpendicular to the crossbeam and are respectively arranged below the two ends of the crossbeam; a lifting ring is provided on the crossbeam, and the lifting ring is located in the middle of the upper end surface of the crossbeam, and the hook of the external casting crane drives the lifting tool to move by hooking the lifting ring; the lower ends of the two lifting handles are provided with hooks, and the hooks hook the casting handles to connect the lifting tool and the casting handles together.

[0013] The hook tip angle of the hook and the included angle of the lifting handle are negative angles of -5 to -10 degrees, which can effectively prevent the pouring handle and the ladle from falling off during the pouring process of the molten metal lifting and pouring device.

[0014] Furthermore, the overall structure of the casting handle is in a "Z" shape, including a main shaft and a handle. The handle is arranged above the main shaft and parallel to the main shaft, and the handle and the main shaft are connected by a connecting rod.

[0015] The pouring handle of the present invention is also provided with a handle, so that when a crane or other equipment fails during any process of placing, transporting or pouring, the pouring bag can be lifted away from the lifting tooling by manually holding the pouring handle at any time to continue to complete subsequent operations, thereby avoiding interruption of production or testing.

[0016] Furthermore, a "concave" shaped buckle is rotatably provided at one end of the handle close to the main shaft, and the "concave" shaped buckle is overlapped with the hanging handle.

[0017] Furthermore, a limiting piece protruding outward is provided on the outer side of the hanging handle, and when overlapping, the "concave" shaped buckle and the hanging handle are overlapped, and the limiting piece limits the "concave" shaped buckle.

[0018] By arranging a "concave" shaped buckle between the lifting fixture and the pouring handle of the present invention, it is possible to prevent the lifting fixture from tipping over during the lifting of the molten metal lifting and pouring device, thereby making the ladle position unstable and causing the molten metal in the ladle to tip over, causing personal injury to the staff and waste of molten metal.

[0019] Furthermore, two bosses are coaxially and symmetrically provided on both sides of the ladle, and a blind hole that matches the boss clearance is provided at the end of the main axis of the pouring handle away from the handle. Fasteners are used to fasten the boss and the blind hole to fix the ladle and the pouring handle together.

[0020] The ladle and the pouring handle of the present invention are fastened with fasteners after the boss and the blind hole are clearance-matched, so that the ladle and the pouring handle are firmly connected together. As long as the bosses on both sides of the ladle and the blind holes of the main shaft of the pouring handle are clearance-matched, the molten metal lifting and pouring device can be suitable for ladles containing molten metal of different capacities.

[0021] The ladle is also provided with a pouring nozzle, the center line of the pouring nozzle is perpendicular to the center axes of the two bosses, a traction ring is provided on one side of the pouring nozzle of the ladle, a traction rod is connected to the traction ring, and the traction ring is located in the middle of one side of the pouring nozzle of the ladle.

[0022] The present invention provides a traction ring on the ladle, which is connected to the traction ring through a traction rod, so that workers can control the ladle during the processes of placing, transporting, pouring, etc. at a long distance, so that a certain distance is maintained between people and the ladle, thereby avoiding the occurrence of safety hazards and reducing personal injuries.

[0023] A ladle lifting ring is also provided in the middle of the center line of the side of the ladle. When the ladle is lifted manually, the ladle can be lifted by passing the ladle lifting rod through the ladle lifting ring.

[0024] The overall structure of the traction rod is in an "L" shape, and the short side of the "L"-shaped traction rod passes through the traction ring and is connected to the traction ring.

[0025] A method for using a molten metal lifting and pouring device, comprising the following steps:

[0026] Ⅰ. The pouring handles are symmetrically arranged on both sides of the ladle and fixedly connected to the ladle;

[0027] Ⅱ. Hook the hook on the lifting tool to the main shaft of the pouring handle, and buckle the "concave" buckle on the pouring handle to the lifting handle of the lifting tool and limit it through the limiter to form a self-locking;

[0028] III. Place the ventilation ring on the top of the ladle, connect the air inlet pipe to the external protective gas transport pipe, and pass the protective gas into the air inlet pipe;

[0029] IV. Hook the hook of the external pouring crane to the lifting ring on the lifting tooling, and move the external pouring crane to move the molten metal lifting and pouring device.

[0030] Furthermore, the flow rate of the protective gas introduced into the air inlet pipe is Q=v*A*n, wherein v is the air flow velocity of each air outlet, v=20-30m / s, A is the cross-sectional area of ​​each air outlet, and n is the number of air outlets.

[0031] By adopting the above technical solution, the present invention has the following beneficial effects:

[0032] (1) The molten metal lifting and pouring device of the present invention provides an inert gas protection system on the ladle to protect the molten metal in the ladle with inert gas, thereby preventing impurities from mixing into the molten metal during the process of taking the molten metal out of the furnace, placing it in a container, transporting it, pouring it, and other processes, and can effectively isolate oxygen, moisture, etc. in the air, thereby effectively preventing the molten metal from being oxidized or contaminated.

[0033] (2) The inert gas protection system of the present invention comprises a ventilation ring and an air inlet pipe, wherein the ventilation ring is evenly provided with a plurality of circles of air outlet holes. After the gas enters the ventilation ring through the air inlet pipe, it is evenly released from the air outlet holes of the ventilation ring, forming a protective gas barrier on the ladle, effectively isolating oxygen, moisture, dust, etc., to prevent oxidation or contamination of the molten metal.

[0034] (3) The upper side surface of the inner ring of the vent ring of the present invention is provided with at least one circle of vent holes, forming an inert gas barrier at the top of the ladle to isolate oxygen, moisture, dust, etc. from the outside. The lower side surface of the inner ring of the vent ring of the present invention is provided with at least one circle of vent holes, and gas is blown into the interior of the ladle to form a protective gas layer on the surface of the molten metal in the ladle, which can effectively isolate the air and prevent the molten metal from oxidation.

[0035] (4) The pouring handle of the present invention is also provided with a handle, so that when a crane or other equipment fails during any of the processes of placing, transporting, and pouring, the pouring bag can be lifted away from the lifting tooling by manually holding the pouring handle at any time to continue to complete subsequent operations, thereby avoiding interruption of production or testing.

[0036] (5) By providing a "concave"-shaped buckle between the lifting fixture and the pouring handle of the present invention, it is possible to prevent the lifting fixture from tipping over during the lifting of the molten metal by the pouring device, thereby preventing the position of the ladle from being unstable and causing the molten metal in the ladle to tip over, thereby causing personal injury to the workers and waste of molten metal; and during pouring, only one person is required to remove the concave buckle overlapped on the lifting fixture, thereby reducing the number of personnel.

[0037] (6) The ladle and the pouring handle of the present invention are fastened with fasteners after the boss and the blind hole are clearance-matched, so that the ladle and the pouring handle are firmly connected together. As long as the bosses on both sides of the ladle and the blind holes of the main shaft of the pouring handle are clearance-matched, the molten metal lifting and pouring device can be suitable for ladles containing molten metal of different capacities.

[0038] (7) The present invention provides a traction ring on the ladle, which is connected to the traction ring through a traction rod, so that the staff can control the ladle during the process of placing, transporting, pouring, etc. at a long distance, so that a certain distance is maintained between the staff and the ladle, thereby avoiding the occurrence of safety hazards and reducing personal injury.

[0039] (8) The middle part of the center line of the side of the ladle of the present invention is also stacked with a plurality of ladle lifting rings. When the ladle is lifted manually, the ladle can be lifted by passing the ladle lifting rod through the ladle lifting ring.

[0040] (9) The flow rate of the protective gas introduced into the air inlet pipe of the present invention is Q=v*A*n, wherein v is the air flow velocity of each air outlet, v=20-30 m / s, A is the cross-sectional area of ​​each air outlet, and n is the number of air outlets. By introducing the protective gas with a flow rate of Q into the ventilation ring, the protective gas is ejected from the air outlet at an air flow velocity of v=20-30 m / s, forming a "protective gas wall" on the ladle, which effectively isolates oxygen, moisture, dust, etc. to prevent oxidation or contamination of the molten metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0042] Figure 1 It is a front view of a molten metal lifting and pouring device according to an embodiment of the present invention;

[0043] Figure 2 A top view of a molten metal lifting and pouring device according to an embodiment of the present invention;

[0044] Figure 3 A schematic diagram of the structure of a lifting tool according to an embodiment of the present invention;

[0045] Figure 4 It is a schematic structural diagram of a pouring handle according to an embodiment of the present invention;

[0046] Figure 5 A schematic structural diagram of a ladle according to an embodiment of the present invention;

[0047] Figure 6 The figure is a schematic structural diagram of an inert gas protection system according to an embodiment of the present invention.

[0048] The numbers in the accompanying drawings are: lifting tool 1, pouring handle 2, ladle 3, traction rod 4, ventilation ring 5, lifting ring 6, hook 7, limiter 8, "concave" buckle 9, fastener 10, traction ring 11, pouring nozzle 12, air outlet 13, external air pipe 14, handle 15. DETAILED DESCRIPTION

[0049] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0053] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when used, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0055] (Device Example)

[0056] See Figures 1 to 6 A molten metal lifting and pouring device comprises a lifting assembly, a ladle 3 and an inert gas protection system; the inert gas protection system is arranged on the ladle 3 to provide inert gas protection to the molten metal in the ladle 3; the ladle 3 is transmission-connected to the lifting assembly, the lifting assembly is transmission-connected to an external pouring crane, the external pouring crane drives the lifting assembly to move, and the movement of the lifting assembly drives the ladle 3 to move.

[0057] The inert gas protection system includes a ventilation ring 5 and an air inlet pipe; the ventilation ring 5 is arranged at the opening of the ladle 3, the interior of the ventilation ring 5 is hollow, and the air inlet pipe is arranged on the outer side of the ventilation ring 5 and is connected with the interior of the ventilation ring 5 to form a complete air path; two circles of air outlet holes 13 are arranged on the inner circle of the ventilation ring 5, and each circle of air outlet holes 13 are arranged in a circular array at equal intervals on the inner circle of the ventilation ring 5, and a circle of air outlet holes 13 are respectively arranged on the upper side and the lower side of the inner circle of the ventilation ring 5, and each circle of air outlet holes 13 is provided with 12.

[0058] The lifting assembly includes a lifting tool 1 and a pouring handle 2; the lifting tool 1 is transmission-connected to an external pouring crane, and the pouring handle 2 is transmission-connected to the lifting tool 1; two pouring handles 2 are provided, and the two pouring handles 2 are symmetrically arranged on both sides of the ladle 3 and are cooperatively connected to the ladle 3. The external pouring crane drives the lifting tool 1 to move, and the movement of the lifting tool 1 drives the pouring handle 2 to move, thereby driving the ladle 3 to move.

[0059] The overall structure of the lifting tool 1 is in a "Π" shape, including a crossbeam and two lifting handles; the two lifting handles are perpendicular to the crossbeam and are respectively arranged below the two ends of the crossbeam; a lifting ring 6 is provided on the crossbeam, and the lifting ring 6 is located in the middle of the upper end surface of the crossbeam. The hook 7 of the external casting crane drives the lifting tool 1 to move by hooking the lifting ring 6; the lower ends of the two lifting handles are provided with hooks 7, and the hooks 7 hook the casting handles 2 to connect the lifting tool 1 with the casting handles 2.

[0060] A reinforcing rib is provided at the connection between the hook 7 and the handle, and the angle between the tip of the hook 7 and the handle is a negative angle of -5 to -10°, which can effectively prevent the hook 7 from falling off the handle, and further prevent the pouring handle 2 and the ladle 3 from falling off.

[0061] The overall structure of the pouring handle 2 is in a "Z" shape, including a main shaft and a handle 15. The handle 15 is arranged parallel to the main shaft above the main shaft, and the handle 15 and the main shaft are connected by a connecting rod.

[0062] The pouring handle 2 of the present invention is also provided with a handle 15, which is convenient for manually lifting the handle 15 of the pouring handle 2 to lift the ladle away from the lifting tooling 1 at any time when equipment failures such as overhead cranes occur during the processes of holding, transporting, and pouring, so as to continue to complete the subsequent operations and avoid the interruption of production or tests.

[0063] The overall structure of the handle 15 is in a "C" shape. A "concave" - shaped buckle 9 is rotatably provided in the middle of one end of the "C" - shaped handle 15 close to the main shaft, and the "concave" - shaped buckle 9 is cooperatively lapped with the handle; by lapping the "concave" - shaped buckle 9 onto the handle of the lifting tooling 1, it can prevent the pouring handle 2 from flipping during lifting.

[0064] An outward - protruding limiting member 8 is provided on the outer side of the handle. During lapping, the "concave" - shaped buckle 9 is cooperatively lapped with the handle, and the limiting member 8 limits the "concave" - shaped buckle 9 to prevent the "concave" - shaped buckle 9 from falling off.

[0065] By providing a "concave" - shaped buckle 9 between the lifting tooling 1 and the pouring handle 2 of the present invention, it can prevent the lifting tooling 1 from flipping during the lifting and pouring process of the molten metal lifting and pouring device, causing the position of the ladle 3 to be unstable and the molten metal in the ladle 3 to pour, resulting in personal injuries to workers and waste of molten metal.

[0066] Two bosses are provided coaxially and symmetrically on both sides of the ladle 3. A blind hole with a clearance fit with the boss is provided at one end of the main shaft of the pouring handle 2 away from the handle 15. The boss and the blind hole are fastened by a fastening bolt to firmly connect the ladle 3 and the pouring handle 2 together to prevent them from falling off.

[0067] In the present invention, the ladle 3 and the pouring handle 2 are firmly connected together by a clearance fit between the boss and the blind hole and then fastened by a fastener 10. As long as the bosses on both sides of the ladle 3 and the blind holes of the main shaft of the pouring handle 2 can have a clearance fit, the molten metal lifting and pouring device of the present invention can be applicable to ladles 3 containing different volumes of molten metal.

[0068] A pouring nozzle 12 is also provided on the ladle 3. The center line of the pouring nozzle 12 is perpendicular to the central axis of the two bosses. A traction ring 11 is provided on one side of the pouring nozzle 12 of the ladle 3. A traction rod 4 is connected to the traction ring 11, and the traction ring 11 is located in the middle of one side of the pouring nozzle 12 of the ladle 3.

[0069] The present invention provides a traction ring 11 on the ladle 3, which is connected to the traction ring 11 through the traction rod 4, so that the staff can control the ladle 3 during the process of placing, transporting, pouring, etc. at a long distance, so that a certain distance is maintained between the staff and the ladle 3, thereby avoiding the occurrence of safety hazards and reducing personal injuries.

[0070] A ladle lifting ring is also provided in the middle of the center line of the side of the ladle 3. When the ladle is lifted manually, the ladle can be lifted by passing the ladle lifting rod through the ladle lifting ring.

[0071] The overall structure of the traction rod 4 is in an “L” shape, and the short side of the “L”-shaped traction rod 4 passes through the traction ring 11 and is connected to the traction ring 11 .

[0072] (Method Example)

[0073] A method for using a molten metal lifting and pouring device, comprising the following steps:

[0074] Ⅰ. Connect the blind holes of the main shafts on the two pouring handles 2 with the bosses on both sides of the pouring ladle through clearance fit, and tighten them with fastening bolts to prevent the pouring ladle 3 and the pouring handle 2 from falling off;

[0075] Ⅱ. Hook the two hooks 7 on the lifting fixture 1 to the main shafts of the two pouring handles 2 respectively, and buckle the "concave" buckles 9 on the two pouring handles 2 to the two lifting handles of the lifting fixture 1 and contact the limiter 8, and limit the position through the limiter 8 to form a self-locking;

[0076] Ⅲ. Place the vent ring 5 on the top of the ladle 3, connect the air inlet pipe to the external protective gas transport pipe, and pass the protective gas into the air inlet pipe;

[0077] Ⅳ. Hook the hook 7 of the external pouring crane to the lifting ring 6 on the lifting tool 1, and move the external pouring crane to move the molten metal to lift the pouring device;

[0078] Ⅴ. When the molten metal hoisting pouring device is moved to the holding station and the molten metal is taken out of the furnace, the staff operates the traction rod to keep the ladle stable. At this time, the operator stays away from the ladle and keeps a certain safe distance from the ladle, reducing personal injury;

[0079] VI. When the molten metal lifting and pouring device is moved to the pouring station, the staff only needs to open the "concave" shaped buckle 9 and operate the pouring handle 2 or the traction rod to deflect the pouring ladle to achieve pouring.

[0080] The flow rate of the protective gas introduced into the air inlet pipe is Q=v*A*n, wherein v is the air flow velocity of each air outlet 13, v=20-30m / s, A is the cross-sectional area of ​​each air outlet 13, and n is the number of air outlets 13. During the process of taking out the molten metal, placing it in the furnace, transporting it, pouring it, etc., the protective gas with a flow rate of Q can be introduced into the ventilation ring 5. The protective gas is ejected from the air outlet 13 at an air flow velocity of v=20-30m / s, forming a "protective gas wall" on the ladle 3, which effectively isolates oxygen, moisture, dust, etc. to prevent the molten metal from being oxidized or contaminated.

[0081] The ladle 3 only needs to satisfy the conditions that the distance between the two bosses is ≤80cm and the total weight is ≤250Kg, so that the molten metal lifting and pouring device can be suitable for ladles 3 containing molten metal of different capacities.

[0082] The shielding gas included argon.

[0083] When a crane or other equipment fails during any of the processes of placing, transporting, and pouring, the staff can lift the pouring bag 2 away from the lifting tool 1 by lifting the handle 15 of the pouring handle 2 to continue the subsequent operations, thus avoiding interruption of production or testing.

[0084] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A molten metal lifting and pouring device, characterized in that: The invention comprises a lifting assembly, a ladle (3), and an inert gas protection system; the inert gas protection system is arranged on the ladle (3) to provide inert gas protection to the molten metal in the ladle (3); the ladle (3) is connected to the lifting assembly by transmission, the lifting assembly is connected to an external pouring crane by transmission, the external pouring crane drives the lifting assembly to move, and the movement of the lifting assembly drives the ladle (3) to move.

2. The molten metal lifting and pouring device according to claim 1, characterized in that: The inert gas protection system comprises a ventilation ring (5) and an air inlet pipe (14); the ventilation ring (5) is arranged at the opening of the ladle, and the air inlet pipe (14) is arranged on the outer side of the ventilation ring (5) and is interconnected with the ventilation ring (5) to form an air path; and at least one circle of air outlet holes (13) is provided on the inner circle of the ventilation ring (5).

3. The molten metal lifting and pouring device according to claim 2, characterized in that: The inner ring of the ventilation ring (5) is provided with at least two circles of air outlet holes (13), each circle of air outlet holes (13) is arranged in an annular array at equal intervals on the inner ring of the ventilation ring (5), and the upper side surface and the lower side surface of the inner ring of the ventilation ring are respectively provided with at least one circle of air outlet holes (13).

4. The molten metal lifting and pouring device according to any one of claims 1 to 3, characterized in that: The lifting assembly comprises a lifting tool (1) and a pouring handle (2); the lifting tool (1) is transmission-connected to an external pouring crane, and the pouring handle (2) is transmission-connected to the lifting tool (1); two pouring handles (2) are provided, and the two pouring handles (2) are symmetrically arranged on both sides of the pouring ladle (3) and fixedly connected to the pouring ladle (3); the external pouring crane drives the lifting tool to move, and the movement of the lifting tool drives the pouring handle to move, thereby driving the pouring ladle to move.

5. The molten metal lifting and pouring device according to claim 4, characterized in that: The overall structure of the lifting tool (1) is in a "Π" shape, comprising a crossbeam and two lifting handles; the two lifting handles are perpendicular to the crossbeam and are respectively arranged below the two ends of the crossbeam; a lifting ring (6) is provided on the crossbeam, and the lifting ring (6) is located in the middle of the upper end surface of the crossbeam, and the lifting hook of the external casting crane drives the lifting tool to move by hooking the lifting ring (6); the lower ends of the two lifting handles are each provided with a lifting hook (7), and the lifting hook (7) hooks the casting handle (2) to connect the lifting tool and the casting handle (2) together.

6. The molten metal lifting and pouring device according to claim 5, characterized in that: The pouring handle (2) has an overall structure in a "Z" shape, comprising a main shaft and a handle (15). The handle is arranged above the main shaft and parallel to the main shaft, and the handle and the main shaft are connected by a connecting rod.

7. The molten metal lifting and pouring device according to claim 6, characterized in that: The handle (15) is rotatably provided with a concave buckle (9) at one end close to the main shaft, and the concave buckle (9) is overlapped with the hanging handle.

8. The molten metal lifting and pouring device according to claim 7, characterized in that: The outer side of the hanging handle is provided with a limiting piece (8) protruding outwards. When overlapping, the "concave" shaped buckle (9) and the hanging handle are overlapped in coordination, and the limiting piece (8) limits the "concave" shaped buckle (9).

9. A method for using the molten metal lifting and pouring device according to claim 8, characterized in that: The usage steps include the following: Ⅰ. The pouring handles (2) are symmetrically arranged on both sides of the ladle and fixedly connected to the ladle; Ⅱ. Hook the hook on the lifting tool to the main shaft of the pouring handle, and buckle the "concave" buckle (9) on the pouring handle to the lifting tool and limit it through the limiter to form a self-locking; III. Place the ventilation ring on the top of the ladle, connect the air inlet pipe to the external protective gas transport pipe, and pass the protective gas into the air inlet pipe; IV. Hook the hook of the external pouring crane to the lifting ring on the lifting tooling, and move the external pouring crane to move the molten metal lifting and pouring device.

10. The method for using the molten metal lifting and pouring device according to claim 9, characterized in that: The flow rate of the protective gas introduced into the air inlet pipe is Q=v*A*n, wherein v is the air flow velocity of each air outlet, v=20-30 m / s, A is the cross-sectional area of ​​each air outlet, and n is the number of air outlets.

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