A lifting device for a die casting steel ingot die casting system

Abstract

This utility model relates to a lifting device for a casting line ingot casting system, comprising two base beams that travel on the existing casting line casting car tracks, four columns fixed on the two base beams, a connecting top fixed to the upper ends of the four columns, a platform that slides up and down within the C-shaped grooves of the four columns, a fall protection device, a hydraulic lifting system for driving the platform's lifting and lowering, and a control system for the movement of the base beams and the lifting and lowering of the platform. The two base beams, which serve as the power foundation for the entire lifting device, are placed parallel to the two casting line casting car tracks. The lower part of the base beams is equipped with a drive wheel and a driven wheel that travel along the two casting line casting car tracks, as well as a motor driving the drive wheel. This device is used as an auxiliary device in the casting line ingot casting system for preparing the mold, cleaning the ingot mold, placing the injection pipe, filling sand, hanging protective slag, and covering the protective cover, solving the problems of high safety risks and high labor intensity during current operations.

Description

Technical Field

[0001] This utility model belongs to the field of iron and steel smelting technology, and in particular relates to a lifting device for a casting system of ingot molds used in the production preparation of casting production lines for casting steel in the steelmaking industry. Background Technology

[0002] Currently, casting in the steelmaking field is divided into two types: ingot casting and continuous casting. With the continuous advancement of science and technology, continuous casting has been widely used due to its high mechanization, high utilization rate, and high efficiency; however, traditional ingot casting is still irreplaceable in the field of special steel due to its stable internal and external quality of steel ingots. The mechanization level of ingot casting is relatively low, especially in the preparation stage of the ingot casting system. Traditional ingot casting adopts the following methods: (1) For pits that are level with the ground, ladders are used to allow personnel to climb onto the ingot mold and stand on it to perform operations such as placing the ingot mold, cleaning the ingot mold, setting up the ingot injection pipe, filling the ingot injection pipe with sand, and hanging protective slag. This method is applicable to all ingot casting production enterprises; (2) For production enterprises with deep pits, a crane is used to lift the grating plate to both sides of the pit, and personnel then perform operations such as placing the ingot mold, cleaning the ingot mold, setting up the ingot injection pipe, filling the ingot injection pipe with sand, and hanging protective slag. Method (1) is problematic because: firstly, the frequent climbing up and down ladders to change work positions increases labor intensity; secondly, the space on the mold is narrow, and personnel operating on the mold are engaged in high-altitude, edge-prone work without safety belt hanging points, posing significant safety risks during operation. Method (2) is problematic because the frequent hoisting of grating plates increases labor intensity, and sometimes the grating plates are too high or too low, requiring personnel to climb the mold to operate, further increasing labor intensity and safety risks.

[0003] The two operating methods described above can no longer meet the safety requirements of production operations under conditions of improved inherent safety. This makes it possible to design a lifting vehicle with lifting and moving capabilities for the casting and pouring of steel wire rod ingots and angle steel systems. This is to meet the needs of reducing labor intensity and improving inherent safety. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a lifting device for a die casting steel ingot die casting system, which can improve the preparation efficiency and intrinsic safety of the die casting steel ingot die casting system and improve the stability of the system preparation for quality.

[0005] The technical solution of this utility model is as follows: A lifting device for a casting line ingot casting system includes two bottom beams that travel north-south on the existing casting line casting car track, four columns fixed on the two bottom beams respectively, a connecting top that connects and fixes the upper ends of the four columns, a platform that slides up and down in the C-shaped grooves of the four columns, a fall arrestor to prevent the platform from falling, a hydraulic lifting system for driving the platform to rise and fall smoothly, and an electronic control system that supplies power for the north-south movement of the bottom beams and the smooth rise and fall of the platform; the two bottom beams are placed parallel to the two parallel casting line casting car tracks as the power foundation of the entire lifting device, and a drive wheel and a driven wheel that travel along the two casting line casting car tracks are installed at the bottom of the bottom beams, as well as a reducer and a motor that drive the drive wheel to rotate, to ensure that the drive wheel and driven wheel at the bottom of the bottom beams travel along the casting line casting car tracks. Flanges are welded and fixed at both ends of the column. Flanges are also welded and fixed on the bottom beam and the connecting top corresponding to the flanges. The column is connected to the bottom beam and the connecting top through the above flanges. The platform includes a guide base, which is a square frame. Four lifting rollers are welded and fixed at the four corners of the square frame. The platform is installed in the C-shaped groove on the inside of the column through the four lifting rollers and slides up and down along the C-shaped groove to ensure that the platform moves up and down along the column. The hydraulic lifting system is the power system for platform lifting. It includes a hydraulic station consisting of an oil tank, hydraulic pump, and hydraulic valves, a hydraulic cylinder, chains, and piping. The hydraulic cylinder is fixed to a column, providing power for the reciprocating motion of the piston. Two chain guide wheels, one large and one small, are installed on the piston rod of the hydraulic cylinder. One end of each chain is fixed to the connecting top, and the other end is fixed to two opposite corners on the same side of the platform. Specifically, one chain passes around the small chain guide wheel on the piston rod, then through the two chain guide wheels on the connecting top, and is fixed downwards to one corner of the platform. The other chain passes around the large chain guide wheel on the piston rod, then through the two chain guide wheels on the connecting top, and is fixed downwards to the other corner of the platform. The extension and retraction of the hydraulic cylinder piston rod drives the chains to work around the chain guide wheels, thereby pulling the platform closer to and away from the connecting top to achieve platform lifting. Chain guide wheels are also installed at two opposite corners on the other side of the platform. One chain is fixed at one end to the connecting top, and the other end passes around the two chain guide wheels on the platform and is fixed downwards to the bottom beam. The fall arrestor includes four electrically controlled fall arrestors and four guide rods. The electrically controlled fall arrestors are fixed to the guide base of the platform. When the magnet is energized, the electrically controlled fall arrestor mechanism retracts, and the electromagnet-energized electrically controlled fall arrestor mechanism extends. Four guide rods are fixed on the bottom beam near the four columns. Long holes are opened at intervals on the side of the four guide rods facing the electrically controlled fall arrestors. When the power is cut off or the chain breaks, the electromagnet-energized electrically controlled fall arrestor mechanism extends and gets stuck in the long holes of the guide rods to prevent the platform from falling.

[0006] An upper platform with railings is installed and fixed on the guide base of the platform. The upper platform is a square frame welded from four rectangular steel pipes. The square frame is divided into several square holes by several rectangular steel pipes in the middle. The square holes are covered with grid covers. The square holes in the middle are not covered and are used for the central column pipe to pass through when the platform is lowered. Safety railings composed of rectangular steel pipes are welded around the upper platform and around the square holes in the middle. Movable doors composed of flexible connections are set on the safety railings to facilitate operators to get on and off the platform.

[0007] The four columns are connected to the base beam by four diagonal supports.

[0008] The connecting top is a frame structure, consisting of two 16# I-beams, four 16# I-beams, a rectangular steel pipe, and four chain guide wheels. Flanges are welded to the four corners to connect the four columns. The connecting top and the four columns are connected by four diagonal supports.

[0009] The electrical control system consists of an electrical control box, a remote controller, and connecting wires. The electrical control box comprises a transformer, contactor, frequency converter, and air switch. It is used to control the lifting vehicle of the ingot casting system to move back and forth along the original ingot casting vehicle track, control the platform to rise and fall, and simultaneously supply power to the four electrically controlled fall arresters of the fall arrestor and the remote controller. The remote controller and the electrical control box synchronously control the lifting vehicle of the ingot casting system to move north and south along the original ingot casting vehicle track and to rise and fall the platform.

[0010] The positive effects of the technical solution of this utility model are as follows: (1) The original track of the casting steel car is used in the casting steel line. The bottom beam is made of rectangular steel pipe, which makes the structure stable and firm. It is equipped with a frequency conversion control three-in-one electric drive device to realize the driving function. The structure is simple, the operation is stable, and the positioning is accurate.

[0011] (2) The gantry frame is adopted and the four columns are designed with C-shaped steel, which can meet the requirements of rigidity and strength, and can also be used as the slide for the platform to rise and fall. The structure is simple and the cost is low.

[0012] (3) The platform rises and falls using hydraulic drive. The entire lifting system is driven by a hydraulic cylinder and several heavy chains in a specific way to lift and lower the platform in a balanced and stable manner at the four corners. The structure is simple.

[0013] (4) The preparation of the personnel in the ingot mold system no longer requires climbing ladders to move up and down. At the same time, the labor intensity of operating on the platform is reduced, and the elevator is equipped with safety rope hanging points, which makes the operation safer.

[0014] This utility model relates to the design of a lifting vehicle for preparing ingot molds in the steelmaking industry's die casting production line. It is an auxiliary device used in the preparation of ingot molds for operations such as mold placement, ingot mold cleaning, placement of the central injection pipe, sand filling, hanging of protective slag, and covering with a protective cover. It includes two electrically driven base beams that can move north-south, four columns anchored to the base beams, and a platform that slides up and down within C-shaped grooves in the four columns. It also includes a fall protection device, a hydraulic lifting system, and an electrical control system. By utilizing the existing die casting vehicle track, it fulfills the requirements for movement, lifting, personnel transport, and cargo transport in die casting line preparation, solving the problems of high safety risks and high labor intensity currently encountered during operation. Attached Figure Description

[0015] Figure 1 This is the main structural view of the present invention.

[0016] Figure 2 This is a side view of the structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the bottom beam of this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the column of this utility model.

[0019] Figure 5 This is a cross-sectional view of the column of this utility model.

[0020] Figure 6 This is a schematic diagram of the connecting top structure of this utility model.

[0021] Figure 7 This is a schematic diagram of the platform structure of this utility model.

[0022] Figure 8 This is a top view of the platform structure of this utility model.

[0023] Figure 9 This is a schematic diagram of the guide rod of this utility model.

[0024] Figure 10 This is a schematic diagram of the hydraulic cylinder of this utility model.

[0025] Figure 11 This is a schematic diagram of the chain drive principle on one side of this utility model.

[0026] Figure 12 This is a schematic diagram of the chain drive principle on the other side of this utility model.

[0027] The diagram is labeled as follows: 1. Bottom beam; 2. Column; 3. Connecting top; 4. Platform; 5. Fall protection device; 6. Hydraulic lifting system; 7. Electrical control system. Detailed Implementation

[0028] like Figure 1 , 2 As shown in Figure 3, a lifting device for a casting line ingot casting system includes two bottom beams 1 that travel north-south on the existing casting line casting car track, four columns 2 that are respectively fixed on the two bottom beams 1, a connecting top 3 that connects and fixes the upper ends of the four columns 2, a platform 4 that slides up and down in the C-shaped grooves of the four columns 2, a fall arrestor 5 for preventing the platform 4 from falling, a hydraulic lifting system 6 for driving the platform 4 to rise and fall smoothly, and an electronic control system 7 that supplies power for the north-south movement of the bottom beams 1 and the smooth rise and fall of the platform 4.

[0029] The two bottom beams 1 serve as the power foundation for the entire lifting device and are placed parallel to the two parallel casting steel car tracks. The bottom beams 1 are equipped with drive wheels and driven wheels that travel along the two casting steel car tracks, as well as a reducer and a motor that drive the drive wheels to rotate, ensuring that the drive wheels and driven wheels at the bottom of the bottom beams 1 travel along the casting steel car tracks. The motor drives the reducer, and the output shaft of the reducer drives the drive wheels to rotate through the transmission gear, thereby driving the entire lifting device to travel north and south along the original casting steel car tracks.

[0030] like Figure 1 , 2 As shown in Figure 4, flanges are welded and fixed at both ends of column 2. Corresponding flanges are also welded and fixed on bottom beam 1 and connecting top 3. Column 2 is connected to bottom beam 1 and connecting top 3 through the above flanges. All flanges are connected together by bolts to form the entire frame structure.

[0031] like Figure 4 , 7 As shown in Figure 8, platform 4 includes a guide base, which is a square frame. Four lifting rollers are welded and fixed at the four corners of the square frame. Platform 4 is installed in the C-shaped groove inside the column 2 through these four lifting rollers and slides up and down along the C-shaped groove to ensure that platform 4 moves up and down along the column 2. An upper platform with a railing is installed and fixed on the guide base of platform 4. The upper platform is a square frame welded from four rectangular steel pipes. The square frame is divided into several square holes by several rectangular steel pipes in the middle. The square holes are covered with grid covers. The square holes in the middle are not covered and are used for the central column pipe to pass through when the platform descends. Safety railings composed of rectangular steel pipes are welded around the upper platform and around the square holes in the middle. Movable doors composed of flexible connections are set on the safety railings to facilitate operators to get on and off platform 4.

[0032] like Figure 10 , 11As shown in Figure 12, the hydraulic lifting system 6 is the power system for lifting the platform 4. It includes a hydraulic station consisting of an oil tank, a hydraulic pump, and hydraulic valves; a hydraulic cylinder connected to the hydraulic pump via piping; chains mounted on sprockets; and various piping. The hydraulic cylinder is fixed to a column 2 to provide power for the reciprocating motion of the hydraulic cylinder piston. Two chain guide wheels, one large and one small, are mounted on the piston rod of the hydraulic cylinder. One end of each chain is fixed to the connecting top 3, and the other end is fixed to two opposite corners on the same side of the platform 4. Specifically, after one end of one chain is fixed to the connecting top 3, the other end of the chain passes around a small chain guide wheel on the piston rod before... After passing through the two chain guide wheels on the connecting top 3, the chain is fixedly connected downwards to one corner of the platform 4; after one end of the other chain is fixed to the connecting top 3, the other end passes around the large chain guide wheel on the piston rod, passes through the two chain guide wheels on the connecting top 3, and is fixedly connected downwards to the other corner of the platform 4. The extension and retraction of the hydraulic cylinder piston rod drives the chain to work around the chain guide wheel, thereby pulling the platform 4 to move closer to and away from the connecting top 3 to achieve the lifting and lowering of the platform 4; chain guide wheels are also installed on two opposite corners on the other side of the platform 4. After one end of the chain is fixed to the connecting top 3, the other end passes around the two chain guide wheels on the platform 4 and is fixedly connected downwards to the bottom beam 1. like Figure 1 , 2 As shown in Figure 9, the fall arrestor 5 includes four electrically controlled fall arrestors and four guide rods. The electrically controlled fall arrestors are fixed to the guide base of the platform 4. When the magnet is energized, the electrically controlled fall arrestor mechanism retracts, and the electromagnet-energized electrically controlled fall arrestor mechanism extends. Four guide rods are fixed on the bottom beam 1 near the four columns 2. Elongated holes are opened at intervals on the side of the four guide rods facing the electrically controlled fall arrestors. When the power is cut off or the chain breaks, the electromagnet-energized electrically controlled fall arrestor mechanism extends and locks into the elongated holes of the guide rods to prevent the platform 4 from falling. The four columns 2 are connected to the bottom beam 1 by four diagonal supports.

[0033] like Figure 1 , 2 As shown in Figure 6, the connecting top 3 is a frame structure, consisting of two 16# I-beams, four 16# I-beams, a rectangular steel pipe, and four chain guide wheels. Flanges are welded to the four corners to connect the four columns 2. The connecting top 3 and the four columns 2 are connected by four diagonal supports.

[0034] like Figure 1 , 2As shown, the electrical control system 7 consists of an electrical control box, a remote controller, and connecting wires. The electrical control box consists of a transformer, a contactor, a frequency converter, and an air switch. It is used to control the lifting vehicle of the ingot casting system to move back and forth along the original ingot casting vehicle track, control the platform 4 to rise and fall, and simultaneously supply power to the four electrically controlled fall arresters of the fall arrestor 5 and to the remote controller. The remote controller and the electrical control box synchronously control the lifting vehicle of the ingot casting system to move north and south along the original ingot casting vehicle track and the platform 4 to rise and fall.

[0035] like Figure 3 As shown, the bottom beam 1 consists of two beams, each composed of a rectangular tube of Q235 material with a specification of 250mm×200mm×8mm, a set of φ160 driving wheel and a set of three-in-one drive motor reducer. A 350mm*430mm*20mm steel flange is welded on the bottom beam to connect each column 2. Each steel flange is reinforced by four 12mm thick reinforcing ribs around its perimeter to ensure connection strength.

[0036] like Figure 4 , 5 As shown, there are four columns 2, each made of 5mm thick Q235 steel plate bent into a length of 5100mm using a bending machine, with a cross-section of 280mm*170mm*170mm. The columns are bent at 90° at both ends into 60mm C-shaped steel sections, serving as tracks and guides for the rollers of platform 4. A 350mm*430mm*20mm steel flange is welded to each end of the C-shaped steel section to connect the bottom beam 1 and the top beam 2. The four columns 2 are connected to the two bottom beams 1 by four diagonal supports to ensure stability and prevent overturning.

[0037] like Figure 6 As shown, the connecting top 3 is a frame structure, consisting of two 5500mm long 16# I-beams, four 3000mm long 16# I-beams, a rectangular steel pipe, and four chain guide wheels. A 350mm*430mm*20mm steel flange is welded to each of the four corners to connect the four columns 2. The connecting top 3 and the four columns 2 are connected by four diagonal supports to ensure firmness and prevent overturning.

[0038] like Figure 7 , 8As shown, the platform 4 consists of a guide base and an upper platform (with railing). The guide base is a 2800mm*5000mm square frame welded together from two 100mm*150mm rectangular steel pipes with a length of 2800mm and two 100mm*150mm rectangular steel pipes with a length of 5000mm. A set of guide frames with four lifting guide wheels and one chain guide wheel are welded at the four corners of the square frame, which are used for guiding the platform 4 to move up and down along the column 2 and for chain guidance. The upper platform (with railing) is a 2800mm*5000mm square frame welded from two 100mm*50mm rectangular steel pipes with a length of 2700mm and two 100mm*50mm rectangular steel pipes with a length of 5000mm. The square frame is divided into several long holes of about 520mm*850mm by several 100mm*50mm rectangular steel pipes in the middle. The long holes are covered with grid covers. The 1000mm*1300mm square hole in the middle is not covered and is used for the central column pipe to pass through when the platform is lowered. The upper platform (with railing) and the 1000mm*1300mm square hole in the middle are surrounded by safety railings made of rectangular steel pipes. Several movable gates with flexible connections are set at appropriate positions on the safety railings to facilitate the operation of workers to get on and off the platform.

[0039] like Figure 1 , 2 As shown in Figure 9, the fall arrestor 5 consists of four electrically controlled fall arrestors (purchased components) and four guide rods. The electrically controlled fall arrestors (purchased components) are fixed on the guide base of the platform 4. When the magnet is energized, the electrically controlled fall arrestor (purchased component) mechanism retracts, and the electromagnet-energized electrically controlled fall arrestor (purchased component) mechanism extends. The four guide rods are fixed on the base 1 and close to the four columns 2. The guide rods are 40mm*40mm tubes with a length of 5000mm. On the side of the rectangular steel tube facing the electrically controlled fall arrestor (purchased component), there is a 100mm*30mm long hole every 150mm. When the power is cut off or the chain breaks, the electromagnet-energized electrically controlled fall arrestor (purchased component) mechanism extends and gets stuck in the 100mm*30mm long hole of the guide rod to prevent the platform 4 from falling.

[0040] like Figure 1 , 2As shown, the hydraulic lifting system 6 is the power system for lifting the platform 4. It consists of a hydraulic station, hydraulic cylinder, chain, and piping. The hydraulic station is fixed on a column 2 to provide power for the reciprocating motion of the hydraulic cylinder piston. It consists of an oil tank, hydraulic pump, and hydraulic valve. The hydraulic cylinder piston rod is equipped with a large and a small chain guide wheel. The chain consists of four LH1244 heavy-duty chains. Two of the chains are fixed at one end to the connecting top 3 and at the other end to the two corners of the platform 4. The two corners of the platform 4 are driven to rise and fall through the hydraulic cylinder chain guide wheel and the guide wheel on the connecting top 3. The lifting and lowering of the other two corners of the platform 4 are driven by the lifting and lowering corners of the platform 4 and the other two chains respectively. The other two chains are fixed on the connecting top 3 and the bottom beam 1 respectively. The middle is driven by the lifting and lowering guide wheel of the platform 4 and the non-lifting and lowering guide wheel respectively.

[0041] The electrical control system 7 consists of an electrical control box, a remote controller, and connecting wires. The electrical control box comprises a transformer, contactor, frequency converter, and air switch, and is used to control the movement of the pre-casting lifting vehicle along the original casting vehicle track, control the ascent and descent of platform 4, and simultaneously supply power to the four electrically controlled fall arresters (purchased components) of the fall arrestor 5 and to the remote controller. The remote controller and electrical control box synchronously control the movement of the pre-casting lifting vehicle along the original casting vehicle track and the ascent and descent of platform 4.

[0042] A design for a lifting vehicle for a die casting steel ingot casting system includes the following steps: Step SO1: Using the cast steel rail, two bottom beams parallel to the cast steel rail are used as the power base of the entire lifting vehicle. The bottom beams are equipped with main and driven wheels and drive motors to ensure the movement of the bottom beams. Step SO2: Root two columns on each bottom beam. The inner side of the four columns adopts a C-shaped groove design. The upper ends of the four columns are connected and fixed with angle steel to form a frame. Step SO3: The lifting platform consists of a guide base and an upper platform (with railing). The platform can move up and down under the guidance of the columns through a hydraulic lifting system. The moving distance is 4000mm. This allows the operator to climb the platform to a high position and pass through the central column pipes of different heights of the casting steel line. When reaching the working position, the platform can be lowered to a suitable height to perform operations such as mold placement, ingot mold cleaning, placement of the central injection pipe, sand filling, hanging protective slag, and covering with protective covers. Step SO4: The outer side of the column and the bottom beam is supported by diagonal bracing; the upper channel steel of the column is supported by angle steel diagonal bracing; and the symmetrical channel steels are connected by two channel steels to increase the stability of the entire frame system. Step SO5: The lifting platform is made of rectangular steel pipes welded into a frame. Inside the frame, rectangular steel pipes are used to form several small frames. A rectangular central hole is reserved in the center to facilitate the passage of the injection pipe. The remaining frames are covered with grating plates to form a plane. Safety fences made of rectangular steel pipes are welded around the platform and around the square hole in the middle. Several movable doors with flexible connections are set at appropriate positions on the safety fences to facilitate the operators to get on and off the platform. Step SO6: The lifting platform of the present invention adopts a fall protection device design, which consists of four electrically controlled fall protection devices and four guide rods. Step SO7: A hydraulic lifting system is designed, which consists of a hydraulic station, hydraulic cylinders, chains, and piping. Step SO8: The electrical control system of the present invention consists of an electrical control box, a remote controller and connecting wires. The electrical control box consists of a transformer, a contactor, a frequency converter and an air switch, etc., and is used to control the preparation of the lifting car of the ingot casting steel casting system to move back and forth along the original ingot casting steel casting car track, control the platform to rise and fall, and at the same time supply power to the electrically controlled fall arrestor of the fall arrestor.

Claims

1. A lifting device for a casting line ingot casting system, comprising two bottom beams (1) that travel on the existing casting line casting car track, four columns (2) respectively fixed on the two bottom beams (1), a connecting top (3) that connects and fixes the upper ends of the four columns (2), a platform (4) that slides up and down in the C-shaped grooves of the four columns (2), a fall arrestor (5) for preventing the platform (4) from falling, a hydraulic lifting system (6) for driving the platform (4) to rise and fall, and an electrical control system (7) for supplying power to the bottom beams (1) for travel and the platform (4) for rising and falling, characterized in that: The two bottom beams (1) are placed parallel to the two parallel cast steel car tracks as the power foundation of the entire lifting device. The bottom beams (1) are equipped with drive wheels and driven wheels that travel along the two cast steel car tracks, as well as a reducer and motor that drive the drive wheels to rotate, to ensure that the drive wheels and driven wheels at the bottom of the bottom beams (1) travel along the cast steel car tracks. Flanges are welded and fixed at both ends of the column (2). Flanges are also welded and fixed on the bottom beam (1) and the connecting top (3) corresponding to the flanges. The column (2) is connected to the bottom beam (1) and the connecting top (3) through the above flanges. The platform (4) includes a guide base. The guide base is a square frame. Four lifting rollers are welded and fixed at the four corners of the square frame. The platform (4) is installed in the C-shaped groove inside the column (2) through the four lifting rollers and slides up and down along the C-shaped groove to ensure that the platform (4) moves up and down along the column (2). The hydraulic lifting system (6) is the power system for lifting the platform (4), including a hydraulic station consisting of an oil tank, a hydraulic pump and hydraulic valves, a hydraulic cylinder, chains and piping. The hydraulic cylinder is fixed on a column (2) to provide power for the reciprocating motion of the hydraulic cylinder piston. Two chain guide wheels, one large and one small, are installed on the piston rod of the hydraulic cylinder. One end of each chain is fixed to the connecting top (3), and the other end is fixed to two opposite corners on the same side of the platform (4). Specifically, one chain passes around a small chain guide wheel on the piston rod, then passes through the two chain guide wheels on the connecting top (3) and then descends to meet the platform. One corner of the platform (4) is fixedly connected; another chain passes around the large chain guide wheel on the piston rod, then passes through the two chain guide wheels on the connecting top (3) and is fixedly connected to the other corner of the platform (4). The chain is driven to work around the chain guide wheel by the extension and retraction of the hydraulic cylinder piston rod, thereby pulling the platform (4) to close to and away from the connecting top (3) to realize the lifting and lowering of the platform (4); two chain guide wheels are also installed on the other side of the platform (4). One end of a chain is fixed on the connecting top (3), and the other end passes around the two chain guide wheels on the platform (4) and is fixedly connected to the bottom beam (1) downwards; The fall arrestor (5) includes four electrically controlled fall arrestors and four guide rods. The electrically controlled fall arrestors are fixed on the guide base of the platform (4). When the electromagnet is energized, the electrically controlled fall arrestor mechanism retracts. When the electromagnet is de-energized, the electrically controlled fall arrestor mechanism extends. Four guide rods are fixed on the bottom beam (1) near the four columns (2). Long holes are opened at intervals on the side of the four guide rods facing the electrically controlled fall arrestors. When the power is cut off or the chain breaks, the electrically controlled fall arrestor mechanism extends out and gets stuck in the long hole of the guide rod to prevent the platform (4) from falling.

2. The lifting device for a die casting system for ingot casting of steel wire rod according to claim 1, characterized in that: An upper platform with a railing is installed and fixed on the guide base of the platform (4). The upper platform is a square frame welded from four rectangular steel pipes. The square frame is divided into several square holes by several rectangular steel pipes. The square holes are covered with grid covers. The square holes in the middle are not covered with covers and are used for the central column pipe to pass through when the platform descends. Safety railings composed of rectangular steel pipes are welded around the upper platform and around the square holes in the middle. Movable doors composed of flexible connections are set on the safety railings to facilitate the operator to go up and down the platform (4).

3. The lifting device for a die casting steel ingot casting system according to claim 1, characterized in that: The four columns (2) are connected to the bottom beam (1) by four diagonal supports.

4. The lifting device for a die casting steel ingot casting system according to claim 1, characterized in that: The connecting top (3) is a frame structure, consisting of two 16# I-beams, four 16# I-beams, a rectangular steel pipe and its four chain guide wheels. Flanges are welded to the four corners to connect the four columns (2). The connecting top (3) and the four columns (2) are connected by four diagonal supports.

5. A lifting device for a die casting system for ingot casting of steel wire rod according to claim 1, characterized in that: The electrical control system (7) consists of an electrical control box, a remote controller and connecting wires. The electrical control box consists of a transformer, a contactor, a frequency converter and an air switch. It is used to control the preparation lifting car of the casting steel wire ingot casting system to move back and forth along the original casting steel car track, control the platform (4) to rise and fall, and at the same time supply power to the four electrically controlled fall arresters of the fall arrestor (5) and power the remote controller. The remote controller electrical control box synchronously controls the preparation lifting car of the casting steel wire ingot casting system to move north and south along the original casting steel car track and the platform (4) to rise and fall.

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