Discharge structure for a cupola furnace

Abstract

The utility model discloses a discharge structure of cupola, including the furnace body, the detachable cover body is engaged with the furnace body upper end, the side wall of furnace body is located at the same level height and is opened with the clear residue mouth and the flow guide groove mouth respectively, the flow guide plate one end is through the hinge shaft and is connected with the iron notch swing, the atomizing pipe is installed to the flow guide plate top along the length direction, the back of flow guide plate is fixed with two groups of side plates symmetrically, and the slide bar is horizontally erected between two groups side plates, and the outer wall of furnace body is equipped with the rotation mechanism of drive sliding block along the slide bar reciprocating sliding. The utility model discloses a flow guide plate and sliding block, slide bar etc. component, and the operator can real -time adjustment flow guide plate's inclination angle, thereby flexible control iron liquid from the iron notch and flow out the section area and flow rate, and then can accurate regulation pouring parameter according to the process requirement of different castings, effectively avoided the pouring quality fluctuation of traditional device because of the flow rate unadjustable, promoted the consistency and the pass rate of pouring finished product.

Description

Technical Field

[0001] This utility model relates to the field of discharge structure technology, and in particular to the discharge structure of a cupola furnace. Background Technology

[0002] A cupola furnace is an important piece of equipment in casting production for melting cast iron. It is generally divided into a back furnace and a front furnace. The front furnace of a cupola furnace has the functions of storing molten iron, ensuring uniform composition and temperature of the molten iron, and separating slag to purify the molten iron.

[0003] Chinese utility model patent CN213335469U discloses a cupola furnace front furnace. When in use, the device can clean the slag such as sulfur slag in the furnace body after all the molten iron has flowed out of the furnace body through the slag cleaning port and slag cleaning door. However, the device has certain defects in actual use. For example, the position of the tapping trough on the device is fixed, and it cannot be flexibly adjusted when different castings require different flow rates, which can easily lead to unstable subsequent casting quality. Therefore, it is necessary to propose a cupola furnace discharge structure to address the above problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, the operator can adjust the tilt angle of the guide plate in real time through components such as the guide plate, slider, and slide rod. This allows for flexible control of the cross-sectional area and flow rate of the molten iron flowing out of the tap hole, avoiding the problem of inflexible adjustment when different castings require different flow rates.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: It includes a furnace body, characterized in that a detachable cover is engaged at the upper end of the furnace body; slag removal ports and flow guide slots are respectively opened at the same horizontal height on the side walls of the furnace body; a guide plate is fixedly installed at the flow guide port; an adjustable flow guide plate is installed at the iron outlet; one end of the flow guide plate is movably connected to the iron outlet via a hinge shaft; an atomizing tube is installed above the flow guide plate along its length; two sets of side plates are symmetrically fixed on the back of the flow guide plate; a sliding rod is horizontally mounted between the two sets of side plates; and a rotating mechanism is provided on the outer wall of the furnace body to drive the slider to reciprocate along the sliding rod.

[0008] Preferably, the rotating mechanism includes an electric telescopic rod, the housing end of which is rotatably connected to the outer wall of the furnace body via a rotating shaft, and its telescopic end is hinged to the slider via a universal joint. The universal joint is made of high-temperature resistant alloy material and its surface is covered with a graphite lubricating layer.

[0009] Preferably, the contact end face of the slider is a horizontal plane, and this plane is in complete contact with the area on the back of the guide plate.

[0010] Preferably, a water pump is installed at the upper end of the furnace body, and the water outlet of the water pump is connected to the atomizing pipe.

[0011] Preferably, the surface of the slide bar is covered with a polytetrafluoroethylene wear-resistant layer, and the atomizing tubes are arranged linearly at equal intervals along the upper edge of the guide plate.

[0012] Preferably, the bottom surface of the guide plate is provided with a downwardly inclined guide slope, and the inclination angle of the guide slope is 20°-25°, and the surface of the guide plate is coated with a tungsten carbide wear-resistant coating.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, the present invention provides a discharge structure for a cupola furnace, which has the following beneficial effects:

[0015] 1. This utility model, through components such as a guide plate, slider, and slide rod, allows operators to adjust the tilt angle of the guide plate in real time, thereby flexibly controlling the cross-sectional area and flow rate of molten iron flowing out of the tap hole. This enables precise adjustment of pouring parameters according to the process requirements of different castings, effectively avoiding the fluctuations in pouring quality caused by the unadjustable flow rate in traditional devices, and improving the consistency and pass rate of the finished products.

[0016] 2. In this utility model, the atomizing tube sprays uniform water mist onto the surface of molten iron through nozzles arranged at equal intervals. Rapid vaporization achieves cooling and shaping of molten iron and optimizes its flow state, significantly reducing the amount of oxide slag generated. At the same time, the guide plate's inclined design allows slag to be discharged directionally along the slag removal port, avoiding slag accumulation and blockage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the discharge structure of the cupola furnace proposed in this utility model;

[0018] Figure 2 for Figure 1 Structural diagram.

[0019] Figure 3 for Figure 2 Structural diagram.

[0020] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0021] In the diagram: 1. Furnace body; 2. Slag removal port; 3. Guide plate; 4. Iron tapping port; 5. Baffle plate; 6. Water pump; 7. Atomizing pipe; 8. Cover; 9. Electric telescopic rod; 10. Side plate; 11. Sliding rod; 12. Sliding block. Detailed Implementation

[0022] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0023] This utility model provides a technical solution:

[0024] Please see Figure 1-4 The discharge structure of the cupola furnace includes a furnace body 1. A detachable cover 8 is attached to the upper end of the furnace body 1. A slag cleaning port 2 and a guide channel are respectively opened on the side wall of the furnace body 1 at the same horizontal height. A guide plate 3 is fixedly installed at the channel of the slag cleaning port 2. An adjustable guide plate 5 is installed at the iron outlet 4. One end of the guide plate 5 is movably connected to the iron outlet 4 through a hinge shaft. An atomizing tube 7 is installed above the guide plate 5 along the length direction. Two sets of side plates 10 are symmetrically fixed on the back of the guide plate 5. A sliding rod 11 is horizontally mounted between the two sets of side plates 10. A rotating mechanism for driving the slider 12 to slide back and forth along the sliding rod 11 is provided on the outer wall of the furnace body 1.

[0025] Furthermore, by adjusting the angle of the guide plate 5, precise control of the molten iron flow rate can be achieved, thereby adapting to the pouring requirements of different castings and improving the stability of pouring quality.

[0026] The rotating mechanism includes an electric telescopic rod 9. The end of the housing of the electric telescopic rod 9 is rotatably connected to the outer wall of the furnace body 1 through a rotating shaft. Its telescopic end is hinged to the slider 12 through a universal joint. The universal joint is made of high temperature resistant alloy material and is covered with a graphite lubricating layer.

[0027] Furthermore, the electric telescopic rod 9 is linked with the universal joint to avoid jamming during the movement of the slider 12, ensuring the smoothness and accuracy of angle adjustment.

[0028] The contact end face of the slider 12 is a horizontal plane, and this plane is in complete contact with the area on the back of the guide plate 5;

[0029] Furthermore, by ensuring full contact between the end face of the slider 12 and the back of the guide plate 5, its sliding trajectory can only slide back and forth along the axis of the slider 11.

[0030] A water pump 6 is installed at the upper end of the furnace body 1. The water outlet of the water pump 6 is connected to the atomizing pipe 7. The surface of the slide rod 11 is covered with a polytetrafluoroethylene wear-resistant layer. The atomizing pipe 7 is arranged linearly at equal intervals along the upper edge of the guide plate 5. The bottom surface of the guide plate 3 is provided with a downward inclined guide slope with an inclination angle of 20°-25°. The surface of the guide plate 3 is coated with a tungsten carbide wear-resistant coating.

[0031] Furthermore, water is continuously supplied to the atomizing pipe 7 by the water pump 6 to achieve rapid cooling of the molten iron and optimize its flow state. The inclined design of the guide plate 3 guides the slag to be discharged quickly in a designated direction, avoiding blockage of the slag removal port 2.

[0032] In practical use, the working principle of this utility model is as follows:

[0033] When the device is in use: when the cupola furnace is performing routine smelting operations, the cover 8 is closed at the upper end of the furnace body 1 to form a closed furnace cavity. The guide plate 3 at the slag removal port 2 forms a slag discharge channel with the inner wall of the furnace body 1 through the downward inclined guide slope, which is used for the guidance and temporary storage of slag in daily operations.

[0034] When the flow rate of molten iron needs to be adjusted to meet the casting requirements of different castings, the operator activates the electric telescopic rod 9, which then drives the slider 12 to slide along the axis of the slide rod 11 via the universal joint. As the slider 12 moves back and forth, the guide plate 5 rotates around the hinge axis, and its tilt angle changes in real time, thereby adjusting the cross-sectional area and flow rate of the molten iron flowing out of the tap hole 4, achieving precise control of the casting volume. When the molten iron flows over the surface of the guide plate 5, the water pump 6 delivers cooling water to the atomizing pipe 7, and forms a uniform water mist through the tilted nozzles, which is directly sprayed onto the surface of the molten iron. The water mist vaporizes rapidly upon contact with the high-temperature molten iron, accelerating the cooling and solidification of the molten iron and reducing the formation of oxide slag; on the other hand, the steam pressure optimizes the flow state of the molten iron, avoiding splashing or flow interruption caused by sudden changes in flow rate.

[0035] When slag accumulates in the furnace and needs to be cleaned, the operator opens the slag cleaning port 2. Under the action of gravity, the slag slides down the guide slope of the guide plate 3 and is discharged outward through the slag cleaning port 2. The inclined design of the guide slope allows the slag to naturally converge to the designated area.

[0036] After the pouring is completed, the electric telescopic rod 9 drives the slider 12 to return to the initial position, the guide plate 5 returns to the horizontal state, the atomizing tube 7 stops spraying water, and the operator can perform routine inspections or maintenance on the inside of the furnace body 1 through the detachable cover 8 to ensure the long-term stable operation of the device.

[0037] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. The discharge structure of a cupola furnace, comprising a furnace body (1), characterized in that, The upper end of the furnace body (1) is fitted with a detachable cover (8). The side walls of the furnace body (1) are respectively provided with a slag cleaning port (2) and a flow guide slot at the same horizontal height. A guide plate (3) is fixedly installed at the slot of the slag cleaning port (2). It also includes an iron outlet (4); an adjustable guide plate (5) is provided at the iron outlet (4), one end of the guide plate (5) is movably connected to the iron outlet (4) through a hinge shaft, an atomizing tube (7) is installed above the guide plate (5) along the length direction, two sets of side plates (10) are symmetrically fixed on the back of the guide plate (5), a sliding rod (11) is horizontally mounted between the two sets of side plates (10), and a rotating mechanism is provided on the outer wall of the furnace body (1) to drive the slider (12) to slide back and forth along the sliding rod (11).

2. The discharge structure of the cupola furnace according to claim 1, characterized in that, The rotating mechanism includes an electric telescopic rod (9). The end of the electric telescopic rod (9) is rotatably connected to the outer wall of the furnace body (1) through a rotating shaft. Its telescopic end is hinged to the slider (12) through a universal joint. The universal joint is made of high-temperature resistant alloy material and is covered with a graphite lubricating layer.

3. The discharge structure of the cupola furnace according to claim 2, characterized in that, The contact end face of the slider (12) is a horizontal plane, and this plane is completely in contact with the area on the back of the guide plate (5).

4. The discharge structure of the cupola furnace according to claim 3, characterized in that, A water pump (6) is installed at the upper end of the furnace body (1), and the water outlet of the water pump (6) is connected to the atomizing pipe (7).

5. The discharge structure of the cupola furnace according to claim 4, characterized in that, The surface of the slide bar (11) is covered with a polytetrafluoroethylene wear-resistant layer, and the atomizing tube (7) is arranged linearly at equal intervals along the upper edge of the guide plate (5).

6. The discharge structure of the cupola furnace according to claim 5, characterized in that, The bottom surface of the guide plate (3) is provided with a downward inclined guide slope, and the inclined angle of the guide slope is 20°-25°. The surface of the guide plate (3) is coated with a tungsten carbide wear-resistant coating.

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