An automatic slag skimming device for cast iron pouring

Abstract

The present invention discloses an automatic slag skimming device for cast iron pouring, which includes a crane beam, a guiding frame, a suspension unit and a slag skimming assembly. The guiding frame or the suspension unit is installed on the crane beam through a moving mechanism, and the guiding frame, the suspension unit and the slag skimming assembly can move synchronously along the length direction of the crane beam. The slag skimming assembly makes a vertical movement between the guiding rods of the guiding frame under the suspension action of the suspension unit. The crane beam is erected on the guide rail and can move horizontally along the guide rail, which is orthogonal to the horizontal movement direction of the guiding frame along the crane beam. In this way, the slag skimming assembly can make three-dimensional movements around the ladle as needed. Combining image detection and program control, the slag skimming assembly is set as a rotating automatic slag skimming of a drum rack. At the same time, the slag skimming plate can be replaced with a slag raking harrow, and the size of the slag raking harrow, the spacing between the rake teeth and the size of the slag skimming plate can be adjusted, so as to meet the slag raking / slag skimming requirements of different types of ladles and realize automatic slag raking / slag skimming.

Description

Technical Field

[0001] The present invention belongs to the technical field of smelting and casting, and particularly relates to an automatic slag skimming device for cast iron pouring. Background Art

[0002] Before cast iron pouring, it is necessary to timely skim the slag from the ladle, and when pouring the molten iron into the mold, it is also necessary to use suitable tools such as heat insulation cotton to block the iron slag to prevent the iron slag from entering the mold and ensure the product quality of the final casting.

[0003] Traditionally, both slag skimming and slag blocking of the ladle are mainly completed manually, which has problems such as low efficiency and high safety risks. Therefore, the research and development of automatic slag skimming devices and automatic slag blocking devices have been carried out to meet the requirements of different application environments. For example, Chinese patents with publication numbers CN217775555U, titled "An automatic slag blocking device for tilting ladle", and CN114226706A, titled "An automatic slag skimming device for die casting", etc. The main existing problems are as follows:

[0004] 1. The slag blocking device is either fixedly connected to the ladle, with low adaptability to different ladles and low automation, or fixed to the tabletop or the ground in the operation area for installation, which is likely to form a movement obstacle and affect the trolley transportation or other lifting operations;

[0005] 2. There is a lack of a general device with an integrated design that can both complete automatic slag skimming and automatic slag blocking. Most of the slag blocking still uses the traditional method of manually placing heat insulation cotton;

[0006] 3. There is a lack of a common automatic device for slag skimming and slag blocking that can simultaneously adapt to ladles with different opening sizes. For a ladle with a large opening, when the automatic slag skimming device is small, generally, the required slag skimming effect is achieved by expanding the translation range and increasing the slag skimming times, but sometimes the effect is not ideal.

[0007] In short, the existing automatic slag blocking or slag skimming devices have low adaptability and low equipment utilization rate. Summary of the Invention

[0008] In view of the above problems, the present invention designs an automatic slag blocking device for cast iron pouring, which adopts a space hoisting operation method and an integrated design of slag skimming and slag blocking, saving space, improving the automation degree, and facilitating operation and use.

[0009] An automatic slag blocking device for cast iron pouring designed by the present invention includes a crane beam, a guide frame, a suspension unit, and a slag blocking component, and is characterized in that

[0010] The guiding frame or the suspension unit is installed on the overhead crane beam through a lateral movement mechanism; the lower part of the guiding frame includes at least two fixedly connected guiding rods, which are interconnected by an upper cross bar, and the slag blocking assembly is installed between the guiding rods and moves up and down along the guiding rods. The guiding rods are used to ensure the stability of the slag blocking assembly during the up and down movement and the slag blocking operation;

[0011] The suspension unit is arranged on the overhead crane beam, including floating or low-friction contact with the overhead crane beam. A cable passes through the overhead crane beam and is connected to the lifting lug on the upper part of the slag blocking assembly. The up and down movement of the slag blocking assembly along the guiding rods is realized by the winding and unwinding of the cable; the suspension unit, the guiding frame and the slag blocking assembly move horizontally along the overhead crane beam synchronously;

[0012] The slag blocking assembly further includes a suspension frame, and the lifting lug is arranged at the top of the suspension frame. On both sides of the bottom of the suspension frame, there is a fixed ring each, which serves as the rotating shaft of the roller frame. A roller frame rotation driving motor is installed at an appropriate position in the lower part of the suspension frame, and the motor drives the roller frame to rotate through a transmission mechanism. The roller frame is sleeved on the fixed ring of the suspension frame; a slag blocking plate is detachably installed on the outside of the roller frame.

[0013] A slag raking harrow is detachably installed on the outside of the roller frame, or a slag raking harrow and a slag blocking plate are installed simultaneously.

[0014] Further, the upper part of the suspension frame includes a support plate, which is connected to the fixed ring through at least 2 support rods, and the lifting lug is arranged at the middle position of the support plate.

[0015] Further, the transmission mechanism includes a gear transmission mechanism; the roller frame includes a frame-type roller frame, that is, there is no cylindrical surface structure, and the two side ring bodies are connected by at least 2 transverse connecting rods. The ring body on one side of the roller frame driving motor is fixedly connected to the transmission mechanism and can rotate with the motor. The transverse connecting rods are parallel to the direction of the roller frame rotating shaft.

[0016] Further, a clamping slot is arranged on the outside of the transverse connecting rod of the roller frame, and a slag raking harrow or a slag blocking plate is detachably clamped on the clamping slot. After being inserted, in order to ensure the stability of the rake teeth and the baffle plate, structures such as locking pins can be designed separately. The slag raking harrow includes several single-tooth rakes and / or multi-tooth rakes. In this way, the number and spacing of the rake teeth of the slag raking harrow can be adjusted, which is convenient for the slag raking operation of ladles with different opening sizes. At the same time, the spacing of the rake teeth can be adjusted to adapt to the size of the slag blocks, and it is also convenient for use during other metal melting or pouring processes; the connection methods of the slag raking harrow, the slag blocking plate and the roller frame include other different methods such as screw connection and plug-in connection.

[0017] Further, a camera is also arranged on the suspension frame. The camera includes an infrared camera, and the specific installation position can be adjusted to be based on seeing through the molten iron liquid surface, and is used for taking images of the upper surface of the molten iron in the ladle.

[0018] Furthermore, a slag collector pressure vessel is also provided on the suspension bracket, which is connected to the slag collector spray head through a slag collector transfer pipe and is used to spray the slag collector onto the ladle as needed.

[0019] Furthermore, the shape of the slag baffle includes a square or a circular arc; the slag skimmer includes a slag skimmer with a slightly circular arc or a straight rod shape (i.e., the shape of the rake teeth), so as to ensure that the slag skimmer will not lift the iron slag when rotating with the roller frame, but only move the iron slag out of the ladle and fall into the slag collecting pan / slag collecting box.

[0020] Furthermore, the moving mechanism includes rollers.

[0021] Furthermore, the guiding frame includes a square bracket (including a rectangular shape) with a fixed support, the overhead crane crossbeam includes an I-beam, and a wire trough is arranged in the middle of the overhead crane crossbeam.

[0022] Furthermore, the suspension unit includes a cable winding drum for winding the cable, a lifting drive motor drivingly connected to the cable winding drum, the cable winding drum and the lifting drive motor are installed on the base of the suspension unit, and the start, stop and rotation speed of the lifting drive motor are controlled through a wired or wireless control system to realize the control of the up and down movement of the slag baffle assembly.

[0023] The advantages and beneficial effects of the present invention are as follows: An automatic slag baffle device for cast iron pouring designed by the present invention utilizes the existing overhead crane (gantry crane) equipment and sets a hoisting type automatic slag baffle device, which not only reduces the burden and risk of manual operation, but also avoids the movement interference between the ground automatic slag baffle device and other equipment, and integrates the slag skimming and slag baffle tools on the same rotating cylinder, which is convenient for replacement as needed and adapts to the slag skimming of melting furnaces and ladles of different sizes and the requirements of ladle slag baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structure schematic diagram of an automatic slag baffle device for cast iron melting;

[0025] Figure 2 is a structure schematic diagram of an automatic slag baffle device with slag baffle and slag skimming functions;

[0026] Figure 3 is a partial structure schematic diagram of the roller frame;

[0027] Figure 4 is a mounting structure schematic diagram of the slag baffle and the transverse connecting rod of the roller frame.

[0028] The marks in the figure are as follows:

[0029] Overhead crane crossbeam 1, guiding frame 2, suspension unit 3, slag skimming assembly 4, melting furnace 5;

[0030] Wire trough 1.1;

[0031] Moving mechanism 2.1, guiding rod 2.2;

[0032] Cable 3.1, cable winch 3.2, lifting drive motor 3.3, suspension unit base 3.4;

[0033] Lifting lug 4.1, suspension frame 4.2, roller frame drive motor 4.3, transmission mechanism 4.4, driving roller frame 4.5, slag raking harrow 4.6, slag baffle 4.7, camera 4.8, slag collector pressure vessel 4.9, slag collector transfer pipe 4.10, slag collector spray head 4.11;

[0034] Support plate 4.2.1, support rod 4.2.2, fixed ring 4.2.3;

[0035] Connecting rod 4.5.1, ring body 4.5.2. Specific embodiments

[0036] The following will further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0037] Embodiment 1, as Figure 1 shown, an automatic slag retaining device for cast iron pouring designed by the present invention includes a crane beam 1, a guiding frame 2, a suspension unit 3 and a slag retaining assembly 4;

[0038] The guiding frame or the suspension unit is installed on the crane beam through a lateral moving mechanism 2.1; the lower part of the guiding frame includes at least two fixedly connected guiding rods 2.2. In this embodiment, 4 guiding rods are shown in the figure, which are interconnected by an upper cross bar. The slag retaining assembly is installed between the guiding rods and moves up and down along the guiding rods. The guiding rods are used to ensure the stability of the slag retaining assembly during up and down movement and slag retaining operation; the suspension unit, the guiding frame and the slag retaining assembly can move horizontally synchronously along the length direction of the crane beam. The horizontal moving mechanism adopts a traditional translation drive mechanism of a crane (not shown in the figure); as Figure 1 shown, in this embodiment, the guiding frame is provided with a moving mechanism in the I-beam groove of the crane beam. The suspension unit base 3.4 is fixedly connected to the guiding frame, and the suspension unit, the guiding frame and the slag retaining assembly are driven by a lateral motor to move horizontally synchronously. The suspension unit floats or contacts the crane beam with low friction; or the suspension unit base is installed on the crane beam through a moving mechanism, and the guiding frame is directly fixedly connected to the base. Similarly, the suspension unit, the guiding frame and the slag retaining assembly are driven by a lateral motor to move horizontally synchronously (this driving method is not shown in the figure);

[0039] The suspension unit is arranged on the overhead crane beam, including floating or in low-friction contact with the overhead crane beam. The cable 3.1 passes through the overhead crane beam 1 and is connected to the lifting lug 4.1 on the upper part of the slag shielding component 4. The up-and-down movement of the slag shielding component along the guiding rod is realized by winding in and out the cable. The way the cable passes through the overhead crane beam includes passing through the middle or passing through both sides. In this embodiment, passing through the middle is realized by setting a cable trough 1.1 on the overhead crane beam; the suspension unit, the guiding frame and the slag shielding component move horizontally along the overhead crane beam synchronously;

[0040] The slag shielding component further includes a suspension frame 4.2. The lifting lug 4.1 is arranged at the top of the suspension frame. Both sides of the bottom of the suspension frame each include a fixed ring 4.2.3, and are rotationally connected to the drum frame ring body 4.5.2 through bearings, serving as the rotation fixing link (acting as a rotating shaft) of the drum frame 4.5. A drum frame rotation driving motor 4.3 is installed at an appropriate position in the lower part of the suspension frame. The motor drives the drum frame 4.5 to rotate through a transmission mechanism 4.4. The drum frame is sleeved on the fixed ring of the suspension frame, including the inner sleeve or outer sleeve method. In this embodiment, the drum frame is sleeved outside the fixed ring, and the drum frame rotates around the fixed ring along with the driving mechanism; A slag shielding plate 4.7 is detachably installed on the outside of the drum frame, and slag shielding plates of different sizes and shapes can be installed according to needs. The relevant local structures of the drum frame are as Figure 3 shown.

[0041] Preferably, a slag raking harrow 4.6 is detachably installed on the outside of the drum frame, or the slag raking harrow 4.6 and the slag shielding plate 4.7 are installed simultaneously.

[0042] When only slag raking operation is performed, the slag shielding plate can be not installed. At this time, the ladle is generally in a properly inclined state. The drum frame rotates, and the slag raking harrow drives the iron slag to move towards the inclined side of the ladle, and the iron slag is removed from the ladle and splashes into the slag collection tray / slag collection box below; When only slag shielding operation is performed, the slag raking harrow can be not installed. At this time, the slag shielding plate is in the lowered state. The drum frame is rotated and moved to a suitable position so that the slag shielding plate is located at the ladle diversion port (the notch for facilitating the flow of molten iron), playing a role in shielding the iron slag and preventing it from splashing into the mold, but not affecting the flow of molten iron from the ladle diversion port to the mold; If the slag shielding plate and the slag raking harrow are installed synchronously and only the slag raking operation is performed, at this time, the slag shielding plate is generally in the retracted state, not affecting the rotation of the drum frame and the slag raking operation, or if the installation size is significantly smaller than that of the slag raking harrow, it can remain in the lowered state; The design of the retraction and lowering of the slag shielding plate relative to the drum frame includes two mechanically interchangeable structural designs of plug-in angles, or a stretching structure design, both of which are mature technologies.

[0043] The two ends of the overhead crane crossbeam can be respectively mounted on the guide rails and can move horizontally along the guide rails (not shown in the figure). It is orthogonal to the horizontal movement direction of the guiding frame on the overhead crane crossbeam. At the same time, the slag blocking assembly can move vertically along the guiding frame. In this way, the slag blocking assembly can perform three-dimensional movement around the ladle as needed. Combining image detection and program control, automatic slag blocking can be achieved, thus facilitating the slag blocking operation. This control technology is a mature technology. For details, reference can be made to the Chinese patent document with the publication number CN1507971 and the title "Automatic slag scraping method and device". In this embodiment, the two ends of the overhead crane crossbeam are respectively mounted on the guide rails of the existing overhead crane (crane) in the workshop and can work synchronously with the overhead crane or independently.

[0044] The slag blocking assembly of the illustrated automatic slag blocking device is located above the ladle 5 and can move horizontally and vertically, thus avoiding the movement interference and inconvenient operation caused by fixed installation. At the same time, the size of the slag scraping rake can be replaced, and the slag blocking plate can be detachably replaced, which can meet the requirements of different slag blocking environments.

[0045] Preferably, the upper part of the suspension bracket 4.2 includes a support plate 4.2.1, which is connected to a fixed ring 4.2.3 through at least 2 support rods 4.2.2. The lifting lug 4.1 is arranged at the middle position on the support plate; as shown in the figure, there are 4 support rods, and every 2 support rods are fixedly connected to both sides of one end of the fixed ring 4.2.3; when only 2 support rods are provided, they are generally connected to the middle of the fixed ring to improve the structural stability (not shown in the figure); the two fixed rings can also be connected by a semi-cylindrical body, a cylindrical body or at least two fixed rods (not necessarily connected), so as to further ensure the stability of the rotating shaft frame structure of the roller frame.

[0046] Preferably, the transmission mechanism 4.4 includes a gear transmission mechanism; the roller frame 4.5 includes a frame-type roller frame, that is, without a cylindrical surface structure, and the two side ring bodies 4.5.2 are connected by at least 2 transverse connecting rods 4.5.1. One of the ring bodies on the side of the roller frame drive motor 4.3 is fixedly connected to the transmission mechanism 4.4, and the connection methods include pin connection or screw connection, etc., and it can rotate with the motor. The transverse connecting rods are parallel to the direction of the rotating shaft of the roller frame; the connection methods between the transverse connecting rods and the ring bodies include plug connection, snap connection, screw connection, etc. In this embodiment, it is screw connection.

[0047] Preferably, as Figure 4As shown, a clamping slot is provided on the outer side of the transverse connecting rod 4.5.1 of the roller rack. A slag raking harrow 4.6 or a slag baffle 4.7 is detachably clamped on the clamping slot. After insertion, in order to ensure the stability of the rake teeth and the baffle, structures such as locking pins can also be designed separately. The slag raking harrow includes several single-tooth rakes and / or multi-tooth rakes. In this way, the number and spacing of the rake teeth of the slag raking harrow can be adjusted, and the size of the slag baffle can be replaced, which is convenient for the slag blocking operation of ladles with different opening sizes. At the same time, in order to adapt to the size of the slag blocks, the spacing of the rake teeth can be adjusted, and it is also convenient for use during other metal melting or pouring processes; the connection methods between the slag raking harrow, the slag baffle and the roller rack include other different methods such as screw connection and insertion.

[0048] In this embodiment, both a slag raking harrow and a slag baffle are designed. When performing the slag raking operation, generally, the slag baffle is removed and the slag raking harrow is replaced. Their installation interfaces are the same; when performing the slag blocking operation, directly control the roller rack to rotate the slag baffle to an appropriate angle (refer to the tilting angle of the ladle), and control the automatic slag blocking device to move the slag baffle to the position of the ladle diversion port.

[0049] Preferably, the shape of the slag baffle includes a square or a circular arc. The so-called circular arc means that the side close to the ladle mouth is circular arc, which generally matches the shape of the ladle. When the ladle pours molten iron into the mold, the circular arc slag baffle blocks the area near the diversion port, mainly leaving the diversion port for the molten iron to flow out, and large iron slag blocks are blocked by the circular arc slag baffle. The slag baffle includes slag baffles of various sizes, which can be replaced during use, or multiple slag baffles of different sizes can be directly installed on the roller rack; in this embodiment Figure 1 、 Figure 3 As shown, both a square and a circular arc slag baffle are inserted on the roller rack. The two circular arc slag baffles are of different sizes. During the actual slag blocking operation, select a suitable slag baffle according to the ladle model.

[0050] Preferably, the moving mechanism 2.1 includes rollers.

[0051] Preferably, the guiding frame includes a square bracket (including a rectangle) with a fixed support, and the overhead crane cross beam includes an I-beam.

[0052] Preferably, the suspension unit includes a cable winding drum 3.2 for winding the cable 3.1, a lifting drive motor 3.3 drivingly connected to the cable winding drum. The cable winding drum and the lifting drive motor are installed on the suspension unit base 3.4, and the start, stop and rotation speed of the lifting drive motor are controlled through a wired or wireless control system to realize the control of the up and down movement of the slag blocking assembly.

[0053] Embodiment 2 is different from Embodiment 1 in that only square slag baffles of different sizes are installed on the roller rack. During the slag blocking operation, the slag baffle covers the upper mouth of the ladle on both sides of the ladle diversion port, and only the diversion port is left for the molten iron to flow out.

[0054] Embodiment 3 is different from Embodiment 1 in that the drum rack is only installed with a slag raking harrow. The teeth of the slag raking harrow are slightly circular arcs, and the convex direction of the arc is consistent with the rotation direction of the drum rack, so that the iron slag will not be lifted into the air during the rotation of the drum rack.

[0055] In this embodiment, the slag raking operation is generally carried out as appropriate after the ladle arrives at the pouring table and before pouring. If the slag collection and raking are relatively sufficient after the melting is completed, slag raking may not be required during pouring, and direct slag blocking and pouring can be carried out; if the slag raking operation needs to be implemented, the ladle is generally tilted at a certain angle. Therefore, the main function of the slag raking harrow designed in the present invention when rotating with the drum rack is to directly remove the iron slag from the inclined opening of the ladle and splash it into the slag collection tray / slag collection box (not shown in the figure) below the inclined opening.

[0056] The teeth of the slag raking harrow are straight-bar-shaped slag raking harrows to ensure that the iron slag will not be lifted when the slag raking harrow rotates with the drum rack, but only the iron slag is removed from the ladle and falls into the slag collection tray / slag collection box; in this embodiment, the length of the middle teeth of the slag raking harrow is greater than the length of the teeth at both ends (not shown in the figure), and the shapes of the ends of multiple teeth match the arc-shaped opening of the ladle.

[0057] Embodiment 4 is different from Embodiment 3 in that, as Figure 2 shown, the drum rack is installed with a slag blocking plate and a slag raking harrow at the same time.

[0058] Embodiment 5 is different from Embodiment 1 in that a slag collecting agent pressure vessel 4.9 is further provided on the suspension rack, which is connected to a slag collecting agent spraying head 4.11 through a slag collecting agent conveying pipe 4.10 for spraying the slag collecting agent into the ladle as needed.

[0059] The slag collecting agent is generally sprayed as needed by controlling the spraying pressure of the pressure vessel. In the traditional process, this operation is generally manually completed. The design of the present invention can achieve automatic spraying, but the addition of the slag collecting agent in the pressure vessel is still carried out manually.

[0060] Embodiment 6 is different from Embodiment 4 in that a camera 4.8 is further provided on the suspension bracket. The camera includes an infrared camera, and its specific installation position can be adjusted to ensure a clear view of the molten iron surface, and is used to capture an image of the upper surface of the molten iron in the ladle. By analyzing the gray-scale distribution of the image, it is judged whether it is necessary to spray slag-collecting agent and / or perform slag skimming operation. In an ideal situation, when there is no more iron slag, the gray-scale distribution of the molten iron surface image should be uniform and the gray-scale value should be above a certain threshold. When obvious iron slag appears, the general image gray-scale analysis method can easily analyze the specific area and size of the gray-scale abnormality, so that the next step of spraying slag-collecting agent and / or performing slag skimming operation can be determined according to the specific analysis results. Generally, when the gray-scale abnormal area is small but the scattered quantity is large (both can be judged by the threshold), it is necessary to spray slag-collecting agent and perform slag skimming operation; when the gray-scale abnormal area is large, slag skimming operation can be directly carried out; according to engineering practice, the total spraying times of the slag-collecting agent are limited, such as generally not exceeding 5 times; the specific implementation can also refer to the Chinese patent document with the publication number CN1507971 and the name "Automatic Slag Skimming Method and Device".

[0061] For the components to be controlled such as the lifting drive motor, horizontal moving mechanism, roller rack drive motor, camera, slag-collecting agent pressure vessel, etc. described in the above embodiments, they are connected to an external controller in a wired or wireless manner, which is convenient for automatic or manual intervention control.

[0062] The basic principle of the present invention is as follows:

[0063] 1. Referring to the design of the crane structure or using the existing crane track, a hoisting type automatic slag retaining device is set up. To overcome the instability (easy to generate shaking and rotation) of ordinary suspension equipment during the slag retaining operation before pouring, a special guiding frame limiting structure is designed, which can not only ensure the stability of the slag retaining component moving up and down (vertically), but also the guiding frame can drive the slag retaining component to do translational motion synchronously; the comprehensive suspension unit drives the slag retaining component to move vertically, and the crane crossbeam moves translationally on the track, that is, the slag retaining component can do three-dimensional motion around the melting furnace or ladle according to needs, so as to realize the integrated design of the slag retaining and skimming device, which not only overcomes the problem of easy motion interference of the ground fixed device, but also realizes automatic slag retaining;

[0064] 2. Through the detachable roller rack type slag retaining device, and the slag retaining plate can be replaced (or switched), and the size of the slag skimming rake and the spacing of the rake teeth can be adjusted, so as to adapt to the slag retaining requirements of different types of ladles, and realize the adaptability of the automatic slag retaining device for cast iron pouring of the present invention to different slag retaining requirements on site;

[0065] 3. By integrating the camera (image detection) with the slag collection agent pressure vessel and spraying device design, the degree of automation of the slag blocking operation can be improved (the program control method for components to be controlled such as the lifting drive motor, horizontal movement mechanism, roller rack drive motor, camera, and slag collection agent pressure vessel can be designed with reference to the prior art).

[0066] The above are only some relatively representative embodiments of the automatic slag blocking device for cast iron pouring of the present invention. In fact, the shape of the slag scraping rake, the structural form of the roller rack, the interface between the slag scraping rake and the roller rack, the interface between the slag blocking plate and the roller rack, the combination of the slag blocking plate and the slag scraping rake, the stabilization method of the slag blocking component, etc. can be designed according to actual needs. There are many preferred combination embodiments or variant embodiments, and these changes do not exceed the design concept of the present invention and should also be regarded as the protection scope of the present invention, which will not be listed one by one here.

Claims

1. An automatic slag skimming device for casting cast iron, comprising a crane beam (1), a guiding frame (2), a suspension unit (3) and a slag skimming assembly (4), characterized in that the guiding frame (2) or the suspension unit (3) is installed on the crane beam (1) through a moving mechanism (2.1); the guiding frame (2) includes at least two fixedly connected guiding rods (2.2), and the slag skimming assembly (4) is installed between the guiding rods (2.2); the suspension unit is arranged on the crane beam, and a cable (3.1) passes through the crane beam and is connected to a lifting lug (4.1) on the upper part of the slag skimming assembly; the slag skimming assembly further includes a suspension bracket (4.2), the lifting lug (4.1) is arranged at the top of the suspension bracket (4.2), both sides of the bottom of the suspension bracket each include a fixed ring (4.2.3), a roller frame driving motor (4.3) is installed at the lower part of the suspension bracket, and the motor drives the roller frame (4.5) to rotate through a transmission mechanism (4.4), and the roller frame is sleeved on the fixed ring (4.2.3) of the suspension bracket; a slag skimming plate (4.7) is detachably installed on the outer side of the roller frame, or a slag raking harrow (4.6) and a slag skimming plate (4.7) are installed simultaneously; the roller frame (4.5) includes a frame-type roller frame, and is connected to the two side ring bodies (4.5.2) through at least 2 transverse connecting rods ( 4.5.1), and a clamping slot is arranged on the outer side of the transverse connecting rod ( 4.5.1) of the roller frame, and the slag raking harrow (4.6) or the slag skimming plate (4.7) is detachably clamped on the clamping slot; the number and spacing of the teeth of the slag raking harrow can be adjusted, which is convenient for slag skimming operations of ladles with different opening sizes. At the same time, the spacing of the teeth can be adjusted to adapt to the size of the slag blocks, and it is also convenient for use during other metal melting or casting processes.

2. The automatic slag skimming device for cast iron pouring according to claim 1, characterized in that, The slag raking harrow (4.6) is detachably installed on the outer side of the roller frame.

3. The automatic slag skimming device for cast iron pouring according to claim 1 or 2, characterized in that, The upper part of the suspension bracket (4.2) includes a support plate (4.2.1), which is connected to the fixed ring (4.2.3) through at least 2 support rods (4.2.2), and the lifting lug (4.1) is arranged on the support plate.

4. An automatic slag skimming device for cast iron pouring according to claim 3, characterized in that The transmission mechanism (4.4) includes a gear transmission mechanism, and the ring body on one side of the roller frame driving motor (4.3) is fixedly connected to the transmission mechanism (4.4).

5. The automatic slag skimming device for cast iron pouring according to claim 4, characterized in that, The slag raking harrow includes a plurality of single-tooth rakes and / or multi-tooth rakes.

6. The automatic slag skimming device for cast iron pouring according to claim 3, wherein, A camera (4.8) is further arranged on the suspension bracket, and a pressure vessel for slag collecting agent (4.9) is further arranged on the suspension bracket, and is connected to a slag collecting agent spraying head (4.11) through a slag collecting agent conveying pipe (4.10).

7. An automatic slag skimming device for cast iron pouring according to claim 3, characterized in that, The shape of the slag skimming plate includes a square or a circular arc, and the slag raking harrow includes a slag raking harrow with a slightly circular arc or a straight rod type.

8. An automatic slag skimming device for cast iron pouring according to claim 3, characterized in that, The moving mechanism (2.1) includes rollers.

9. An automatic slag skimming device for cast iron pouring according to claim 3, characterized in that, The guiding frame includes a fixed square support, the crane beam includes an I-beam, and a wire groove (1.1) is arranged in the middle of the crane beam.

10. The automatic slag skimming device for cast iron pouring according to claim 3, wherein The suspension unit includes a cable winding disc (3.2) for winding the cable (3.1), a lifting drive motor (3.3) drivingly connected to the cable winding disc, and the cable winding disc and the lifting drive motor are installed on a suspension unit base (3.4).

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