A molten iron pouring device

Abstract

The utility model belongs to foundry technology field, and disclose a molten iron pouring device, including ladle, the ladle can be obliquely established, the ladle bottom end is equipped with gas storage cylinder, still include electric heating ring, install in the periphery of gas storage cylinder, be used for heating the gas in gas storage cylinder, jet protection spare, set up at the ladle discharge end place, and jet protection spare and gas storage cylinder between connecting have gas hose, follower, set up in the ladle discharge end, the follower rotates with the effusion of molten iron, the electric heating ring of utility model can be adjusted heating according to pressure sensor feedback, ensure the stable pressure of inert gas, guarantee curtain sustained effect, even in the later period of pouring can reliable protection, promote the quality stability of pouring piece, simultaneously, the double -layer gas outlet of jet protection spare design, angle is different and inner diameter is tapered, form more comprehensive and high -strength curtain, further strengthen the protection effect.

Description

Technical Field

[0001] This utility model belongs to the field of casting technology, and specifically refers to a molten iron pouring device. Background Technology

[0002] In the casting process, molten iron pouring is a key process. Its core requirement is to ensure that the molten iron has less contact with air during the pouring process to avoid the formation of oxide slag due to oxidation reaction, thereby ensuring the quality stability of the cast parts. Existing molten iron pouring equipment usually relies on the residual heat of the ladle to preheat and expand the inert gas inside the gas storage cylinder, and then transport the gas to the discharge end through pressure difference to form a protective gas curtain.

[0003] A search revealed a molten iron casting device disclosed in patent application number 202421696965.4. The device describes a system where "a steel ladle is placed in contact with a gas storage cylinder, allowing for preheating and expansion after each injection of protective gas, pressurizing the gas storage cylinder. When the ladle is tilted, a valve structure is opened via a steel rope, allowing the protective gas to be pressurized and enter the connecting pipe through the upper gas pipe, then transported to the ladle's outlet to protect the molten iron." However, in actual use, the pressurization of the gas storage cylinder relies entirely on the residual heat of the ladle. If the initial temperature of the ladle is insufficient (e.g., during initial use or after intermittent operation), the pressure inside the gas storage cylinder will be insufficient, resulting in insufficient protective gas injection. Furthermore, the pressure inside the gas storage cylinder decreases as the ladle temperature drops. If the casting time is long, the protective gas pressure will decrease later, leading to a continuous deterioration in the protective effect. Additionally, the injection direction at the end of the connecting pipe is unidirectional, while the molten iron flows out in a parabolic trajectory during pouring, resulting in poor protective gas coverage at the edge of the outlet. Utility Model Content

[0004] This utility model proposes a molten iron pouring device to solve the problems of insufficient initial or later pouring pressure and insufficient protective gas injection volume caused by the reliance on residual heat of the ladle for pressurization of the existing gas cylinder, and the single injection direction at the end of the pipe, resulting in poor protective gas coverage at the edge of the discharge port when the molten iron is poured.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a molten iron casting device, comprising a ladle, the ladle being tiltable, a gas storage cylinder at the bottom of the ladle, and further comprising:

[0006] An electric heating ring is installed around the gas storage cylinder to heat the gas inside the cylinder.

[0007] An air jet protection device is installed at the outlet end of the ladle, and an air supply hose is connected between the air jet protection device and the air storage cylinder;

[0008] A follower is disposed inside the discharge end of the ladle, and the follower rotates as the molten iron flows out.

[0009] Preferably, the jet protection component includes a jet ring, on the inner circumference of which are connected upper and lower layers of second and first air outlets, the inner diameters of the first and second air outlets gradually decreasing from the outermost end near the ladle discharge end to the inner side.

[0010] Preferably, both the first and second air outlets are tilted downwards, and the downward tilt angle of the second air outlet is greater than that of the first air outlet.

[0011] Preferably, the follower includes a rotating plate disposed in the ladle discharge end via a hinge shaft, and a magnetoelectric speed sensor is mounted on the hinge shaft.

[0012] Preferably, an electrically controlled valve is installed on the air delivery hose, and a pressure sensor is installed inside the air storage cylinder.

[0013] Preferably, the device also includes a support frame, on which the ladle is rotatably mounted. A motor is also mounted on the support frame, and the output end of the motor is connected to the shaft on which the ladle rotates, for driving the ladle to rotate to achieve tilting.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] (1) The electric heating ring can adjust the heating according to the feedback of the pressure sensor to ensure the stability of the inert gas pressure and ensure the continuous effectiveness of the air curtain. Even in the later stage of casting, it can reliably protect the casting and improve the quality stability of the casting. At the same time, the double-layer air outlet design of the air jet protection component has different angles and gradually narrowing inner diameters, forming a more comprehensive and strong air curtain, further enhancing the protection effect.

[0016] (2) The follower can drive the rotating plate to rotate through the molten iron. The magnetoelectric speed sensor monitors the speed change and feeds it back to the controller in real time, thereby adjusting the opening of the electric control valve and synchronously increasing or decreasing the supply of protective gas, so that the supply of protective gas is precisely matched with the outflow of molten iron, avoiding gas waste or insufficient supply.

[0017] (3) When the flow rate of molten iron increases, the rotation speed of the follower increases, and the rotation of the rotating plate will guide the flow direction of molten iron, preventing molten iron from splashing from the discharge port due to excessive flow, and indirectly maintaining a stable output of flow rate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the air storage cylinder, electric heating ring, air delivery hose and air jet protection component of this utility model;

[0021] Figure 3 This is a schematic diagram of the steel ladle and follower of this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram of the jet protection component of this utility model.

[0023] In the diagram: 1. Steel ladle; 2. Air storage cylinder; 3. Electric heating ring; 4. Air delivery hose; 5. Electric control valve; 6. Air jet protection component; 61. Air jet ring; 62. First air outlet; 63. Second air outlet; 7. Follower component; 71. Rotating plate; 72. Magnetoelectric speed sensor; 8. Bracket; 9. Motor. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides, for example Figures 1-4 The illustrated molten iron casting device includes a ladle 1 and a support 8. The ladle 1 is rotatably mounted on the support 8. The ladle 1 is made of a double-layer high-temperature resistant alloy material, with the inner layer coated with a wear-resistant and fire-resistant coating of 5-8mm thickness, capable of withstanding long-term scouring by molten iron at temperatures above 1600℃. A high-precision bearing is installed at the connection between its rotating shaft and the support 8. A motor 9 is also installed on the support 8. The output end of the motor 9 is connected to the rotating shaft of the ladle 1 to drive the ladle 1 to rotate and tilt. The motor 9 is a servo motor equipped with a gearbox and encoder, which can control the tilt angle and tilt speed of the ladle 1. After the operator sets the casting parameters through the controller (not shown), the motor 9 can drive the ladle 1 to rotate smoothly according to the preset program. The tilt angle can be adjusted within the range of 0-90° to meet the needs of different casting scenarios. A gas storage cylinder 2 is provided at the bottom of the ladle 1, which is filled with inert gas. A pressure sensor is installed in the gas storage cylinder 2 to monitor the gas pressure in the gas storage cylinder 2 in real time.

[0026] Secondly, it also includes an electric heating ring 3, an air jet protection component 6, and a follower component 7. The electric heating ring 3 is installed on the periphery of the gas storage cylinder 2 and is used to heat the gas inside the gas storage cylinder 2. The electric heating ring 3 has multiple sets of heating wires inside, and the heating power can be adjusted according to the initial temperature of the gas inside the gas storage cylinder 2 and the required heating temperature. The outer layer of the electric heating ring 3 is wrapped with heat insulation cotton, which can reduce heat loss and improve heating efficiency. The air jet protection component 6 is set at the discharge end of the ladle 1, and an air delivery hose 4 is connected between the air jet protection component 6 and the gas storage cylinder 2. An air delivery hose 7 is installed on the air delivery hose 4. Equipped with an electric control valve 5, the gas supply hose 4 is made of high-temperature and high-pressure resistant fluororubber tubing with good flexibility, which can freely extend, retract and bend with the tilt of the ladle 1 without affecting the normal rotation of the ladle 1. The electric control valve 5 is an electromagnetic control valve with fast response speed. The inert gas sprayed by the jet protection component 6 forms an air curtain around the discharge port, which can isolate the air and prevent the molten iron from reacting with oxygen in the air during the casting process to produce oxide slag, thus ensuring the quality of the cast part. The follower 7 is set in the discharge end of the ladle 1 and rotates with the flow of molten iron.

[0027] As described above, during use, the molten iron inside the ladle 1 preheats and expands the gas storage cylinder 2, increasing the pressure inside the gas storage cylinder 2. If the pressure increase is insufficient or the pressure drops after pouring, the pressure sensor can promptly provide feedback to the controller. The controller then activates the electric heating ring 3 to achieve timely pressure increase, ensuring sufficient inert gas injection during the pouring process. This allows the air jet protection component 6 to continuously form an effective air curtain at the discharge end of the ladle 1, reliably isolating air even in the later stages of pouring, preventing molten iron oxidation, and ensuring the continuity of the pouring process and the quality stability of the poured components.

[0028] Among them, see Figure 2 and Figure 4 As shown, the jet protection component 6 includes a jet ring 61. The inner circumference of the jet ring 61 is connected to a second air outlet 63 and a first air outlet 62 in upper and lower layers. The inner diameters of the first air outlet 62 and the second air outlet 63 gradually decrease from the outermost end near the discharge end of the ladle 1 to the inner side. This structure allows the flow rate of the gas to gradually increase when it is ejected, thereby enhancing the strength and sealing of the air curtain. The air curtain is stronger closer to the outer end.

[0029] The first air outlet 62 and the second air outlet 63 are both tilted downwards, and the downward tilt angle of the second air outlet 63 is greater than that of the first air outlet 62.

[0030] In practical use, when molten iron is poured into the inclined ladle 1, the inert gas in the gas storage cylinder 2 is sent into the air jet ring 61 through the air delivery hose 4, and then sprayed out through the first air outlet 62 and the second air outlet 63. This forms an air curtain on the upper surface of the discharge port to protect the poured molten iron. The second air outlet 63 is tilted downward at a greater angle than the first air outlet 62, so that the airflow coverage areas of the two air outlets are different. The airflow of the lower layer (first air outlet 62) is closer to the molten iron flow path, while the airflow of the upper layer (second air outlet 63) can cover the space above. The two work together to form a more comprehensive and dead-angle-free air curtain, ensuring that the entire discharge port area is effectively protected.

[0031] See Figure 3 As shown, the follower 7 includes a rotating plate 71 located in the discharge end of the ladle 1 via a hinge shaft, and a magnetoelectric speed sensor 72 is mounted on the hinge shaft.

[0032] As described above, when molten iron flows out from the discharge end, it can drive the rotating plate 71 to rotate. The rotation speed of the rotating plate 71 can be monitored by the magnetoelectric speed sensor 72. When the rotation speed increases, it indicates that the amount of molten iron flowing out increases. At this time, the signal fed back to the controller through the magnetoelectric speed sensor 72 can be used to control the opening of the electric control valve 5 to realize the synchronous increase of the supply of protective gas.

[0033] In addition, when the flow rate of molten iron increases, the rotation speed of the follower 7 increases, and the rotation of the rotating plate 71 will guide the flow direction of the molten iron, preventing the molten iron from splashing from the discharge port due to excessive flow, and indirectly maintaining a stable output of flow rate.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A molten iron casting device, comprising a ladle (1), wherein the ladle (1) is tiltable, and a gas storage cylinder (2) is provided at the bottom end of the ladle (1), characterized in that, Also includes: An electric heating ring (3) is installed on the periphery of the gas storage cylinder (2) to heat the gas inside the gas storage cylinder (2); An air jet protection component (6) is provided at the discharge end of the ladle (1), and an air supply hose (4) is connected between the air jet protection component (6) and the air storage cylinder (2); Follower (7) is installed inside the discharge end of the ladle (1) and rotates as the molten iron flows out.

2. The molten iron casting device according to claim 1, characterized in that: The jet protection component (6) includes a jet ring (61), on which a second air outlet (63) and a first air outlet (62) are connected on the inner circumference of the jet ring (61). The inner diameter of the first air outlet (62) and the second air outlet (63) gradually decreases from the outermost end near the discharge end of the ladle (1) to the inner side.

3. The molten iron casting device according to claim 2, characterized in that: The first air outlet (62) and the second air outlet (63) are both tilted downwards, and the downward tilt angle of the second air outlet (63) is greater than that of the first air outlet (62).

4. The molten iron casting device according to claim 1, characterized in that: The follower (7) includes a rotating plate (71) located inside the discharge end of the ladle (1) via a hinge shaft, and a magnetoelectric speed sensor (72) is installed on the hinge shaft.

5. The molten iron casting device according to claim 1, characterized in that: An electric control valve (5) is installed on the air delivery hose (4), and a pressure sensor is installed inside the air storage cylinder (2).

6. The molten iron casting device according to claim 1, characterized in that: It also includes a bracket (8), on which the ladle (1) is rotatably mounted. A motor (9) is also mounted on the bracket (8). The output end of the motor (9) is connected to the shaft on which the ladle (1) rotates, and is used to drive the ladle (1) to rotate so as to achieve tilting.

Images