Intelligent spheroidization station and its control system

Abstract

The invention discloses an intelligent spheroidizing station and its control system. The intelligent spheroidizing station includes a spheroidizing bag, a spheroidizing bag cover that can be lifted and lowered horizontally on the top of the spheroidizing bag, a spheroidizing bag cover driven by a cylinder telescopic four-link mechanism, a smoke exhaust outlet on the spheroidizing bag cover, a vertical smoke exhaust pipe fixedly connected to the outside of the smoke exhaust outlet, a contraction and diameter change setting on the vertical smoke exhaust pipe, and a vertical smoke exhaust pipe sleeve arranged inside the dust removal air duct; the control system of the intelligent spheroidizing station includes a weighing wireless transmitting module, a weighing wireless receiving module, a weight display screen, an RS communication module, a PLC, a touch screen, an alarm light, a length measuring sensor, a wire feeding frequency converter, a platform car frequency converter, a wire feeding motor, and a platform car motor. It can solve the problem of imprecise spheroidizing and waste of cored wire, solve the problem of a large amount of magnesium alloy being drawn away without participating in spheroidizing, and reduce the absorption rate of magnesium alloy, realize the separation of the bag cover, reduce the weight of the spheroidizing bag, facilitate the slag removal in the bag, and reduce the frequency of bag repair and bag cleaning.

Description

Technical Field

[0001] The invention relates to an intelligent spheroidizing station and a control system thereof, belonging to the technical field of molten iron spheroidizing treatment. Background Art

[0002] The wire feeding spheroidizing process is to use a wire feeding machine to continuously insert the alloy cored wire into the bottom of the molten iron ladle, and then cover the molten iron ladle. Due to the high pressure of the molten iron and the effective flow of air blocked by the ladle cover, coupled with the continuous addition of a small amount of alloy cored wire at a certain speed, it can avoid the instantaneous large-scale explosion of Mg vapor and ensure the safe addition of high-Mg alloy, and avoid large-scale overflow and burning of Mg, thereby improving the absorption rate of Mg in molten iron.

[0003] At present, the known wire feeding and pelletizing station mainly comprises a wire feeding machine (1), a wire feeding machine platform (2), a pelletizing bag with a cover (3), a dust collecting hood (4), a dust removal duct (5), and a bag dust collector (6). Figure 1 and Figure 2 shown.

[0004] The existing silk feeding spheronization station still has the following shortcomings:

[0005] First, it cannot be finely spheroidized, which wastes cored wire and increases costs. In the smelting section, the operator manually controls the electric furnace to pour molten iron into the spheroidizing ladle. Although there is an electronic scale on the crane to weigh the molten iron in the spheroidizing ladle in real time, the weight of the molten iron in the spheroidizing ladle usually deviates from the standard value by 30-50 kg after the molten iron is discharged twice. The wire feeder has a simple function and a fixed wire feeding amount each time. In order to ensure the quality of spheroidization, the workshop often sets the wire feeding amount of the wire feeder according to the maximum molten iron weight, which wastes cored wire and increases costs.

[0006] Secondly, the dust hood is directly placed on the wire feeding port of the spheroidizing bag cover. While collecting smoke, it will put the air in the bag in a negative pressure state. A large amount of magnesium alloy is drawn away without participating in spheroidization, which reduces the absorption rate of magnesium alloy.

[0007] Thirdly, the spheroidizing bag cover adopts a fixed structure. The spheroidizing bag is heavy and cannot be slag-removed. As the spheroidizing bag is used, a large amount of molten iron slag will adhere to it, increasing the frequency of bag repair and cleaning.

[0008] In summary, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to propose an intelligent spheroidization station and its control system to solve the bottleneck in the existing technology. Summary of the invention

[0009] In view of the deficiencies in the background technology, the present invention provides an intelligent spheroidizing station and a control system thereof, which can solve the problems of imprecise spheroidization and waste of cored wire in the existing spheroidizing station, solve the problem that a large amount of magnesium alloy is drawn away without participating in spheroidization, and reduce the absorption rate of magnesium alloy, realize the separation of the bag cover, reduce the weight of the spheroidizing bag, facilitate the slag removal in the bag, and reduce the frequency of bag repair and bag cleaning.

[0010] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0011] The intelligent spheroidizing station includes a spheroidizing bag, and the top of the spheroidizing bag is provided with a spheroidizing bag cover that can be lifted and lowered in translation. The lifting and lowering of the spheroidizing bag cover is driven by a space parallel four-bar linkage mechanism driven by the extension and contraction of the cylinder;

[0012] The four-bar linkage mechanism comprises a first link and a second link arranged in parallel in a vertical direction, wherein the length of the second link is greater than that of the first link; the bottom ends of the first link and the second link are both hingedly connected to a link support, and the top end of the first link and the middle part of the second link are both hingedly connected to a hinge support seat;

[0013] A smoke exhaust outlet is arranged on the spheroidizing bag cover, and a vertical smoke exhaust pipe is fixedly connected to the outside of the smoke exhaust outlet. The vertical smoke exhaust pipe is contracted and reduced in diameter near the bottom, and the vertical smoke exhaust pipe is sleeved inside the dust removal air duct.

[0014] Furthermore, the connecting rod support is fixedly connected to a horizontally arranged bag cover bracket through a fastener, and a spheroidized bag cover is horizontally suspended at the bottom of the bag cover bracket through four short-link chains.

[0015] Furthermore, the hinge support seat is fixed to the bottom end of the channel steel frame by fasteners, and the channel steel frame is fixed to the wire feeding machine platform.

[0016] Furthermore, the second connecting rod is hinged to the cylinder head near the top, the cylinder tail is hinged to the wire feeding machine platform, and a counterweight iron plate is fixed above the top of the second connecting rod by welding.

[0017] Furthermore, the diameter of the vertical smoke exhaust pipe is smaller than the diameter of the dust removal air duct; the top of the dust removal air duct is connected to the bag dust collector; and the spheroidizing bag is transported by a rail electric flat car.

[0018] The control system of the intelligent spheroidizing station includes a weighing wireless transmitting module, a weighing wireless receiving module, a weight display screen, an RS communication module, a PLC, a touch screen, an alarm light, a length measuring sensor, a wire feeding inverter, a platform car inverter, a wire feeding motor and a platform car motor.

[0019] Furthermore, the molten iron weighing wireless transmitting module sends the molten iron weight signal to the weighing wireless receiving module in real time. The weighing wireless receiving module communicates with the PLC through the RS communication module. The output end of the weighing wireless receiving module is connected to the input end of the weight display screen, and the molten iron weight is displayed on the weight display screen.

[0020] Furthermore, the PLC input end is connected to a save button, a spheroidization start button and a spheroidization stop button, and the PLC output end is electrically connected to the input end of the alarm light.

[0021] Furthermore, the output end of the length measuring sensor is electrically connected to the input end of the PLC; the output end of the PLC is electrically connected to the input end of the touch screen, and the output end of the touch screen is electrically connected to the input end of the PLC.

[0022] Further, the input end of the wire feeding frequency converter is electrically connected to the output end of the PLC, and the output end of the wire feeding frequency converter is electrically connected to the input end of the wire feeding motor;

[0023] The input end of the platform vehicle inverter is electrically connected to the output end of the PLC, and the output end of the platform vehicle inverter is electrically connected to the input end of the platform vehicle motor.

[0024] After adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0025] Automatically process data. The operation status of the wire feeder is automatically controlled by PLC27. PLC communicates with the weighing module to obtain the weight of each package of molten iron. Under the control of the pre-made program, PLC27 can automatically calculate the length of wire to be fed according to the weight of molten iron in each spheroidizing package. This ensures that the length of each wire feeding matches the weight of spheroidizing molten iron, realizing information-based automatic wire feeding and saving core wire.

[0026] The platform car motor and wire feeding motor are frequency-controlled, with smooth start and stop, stable positioning and accurate measurement; convenient for data statistics, it can automatically record the time of each spheroidization, the weight of molten iron each spheroidization, the length of wire feeding line each spheroidization, and alarm signal display;

[0027] The spheroidizing bag cover is sleeved with the dust removal air duct through a vertical smoke exhaust pipe with a shrinking and variable diameter on the upper part. The shrinking and variable diameter vertical smoke exhaust pipe increases the resistance when the spheroidizing smoke and dust overflows. The smoke inside the bag is in a positive pressure state relative to the outside of the bag, which improves the absorption rate of the magnesium alloy.

[0028] The bag cover is separated by a spatial parallel four-bar linkage, which reduces the weight of the spheroidizing bag, facilitates the removal of slag inside the bag, and reduces the frequency of bag repair and bag cleaning. The whole set of equipment has a simple and practical structure.

[0029] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a spheroidizing station in the prior art;

[0031] Figure 2 It is a schematic diagram of the dust removal structure of the spheroidizing station in the prior art;

[0032] Figure 3 It is a structural schematic diagram of the spheroidizing station of the present invention;

[0033] Figure 4 It is a schematic diagram of the dust removal structure of the spheroidizing station of the present invention;

[0034] Figure 5 It is the electrical principle diagram of the spheroidizing station of the present invention.

[0035] In the figure, 1-wire feeder, 2-wire feeder platform, 3-spheroidizing bag with cover, 4-dust hood, 5-dust removal duct, 6-bag dust collector, 7-core wire, 8-spheroidizing bag cover, 9-short link chain, 10-bag cover bracket, 11-connecting rod support, 12-first connecting rod, 13-second connecting rod, 14-hinge support seat, 15-channel steel frame, 16-cylinder, 17-rail electric flat car, 18-spheroidizing bag, 19-vertical smoke exhaust Tube, 20-weighing wireless transmitting module, 21-weighing wireless receiving module, 22-weight display screen, 23-RS232 communication module, 24-save button, 25-spheroidization start button, 26-spheroidization stop button, 27-PLC, 28-touch screen, 29-alarm light, 30-length measuring sensor, 31-wire feeding inverter, 32-platform car inverter, 33-wire feeding motor, 34-platform car motor. DETAILED DESCRIPTION

[0036] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0037] Example 1 Intelligent Spheroidization Station

[0038] like Figure 3 and Figure 4 As shown together, the present invention provides an intelligent spheroidizing station, including a spheroidizing bag 18, with a spheroidizing bag cover 8 that can be lifted and lowered translationally on the top of the spheroidizing bag 18, and the translational lifting of the spheroidizing bag cover 8 is driven by a space parallel four-bar linkage mechanism driven by the extension and contraction of a cylinder 16.

[0039] The four-bar linkage mechanism comprises a first link 12 and a second link 13 which are arranged in parallel along a vertical direction. The length of the second link 13 is greater than that of the first link 12 .

[0040] The bottom ends of the first connecting rod 12 and the second connecting rod 13 are hingedly connected to the connecting rod support 11, and the connecting rod support 11 is fixedly connected to the horizontally arranged bag cover bracket 10 through fasteners. The spheroidizing bag cover 8 is horizontally suspended at the bottom of the bag cover bracket 10 through four short-link chains 9.

[0041] The top of the first connecting rod 12 and the middle of the second connecting rod 13 are hingedly connected to the hinge support seat 14, and the hinge support seat 14 is fixed to the bottom end of the channel steel frame 15 by fasteners. The channel steel frame 15 is fixed to the wire feeding machine platform 2. The hinge support seat 14 and the channel steel bracket 15 together constitute the frame in the four-bar linkage mechanism.

[0042] The second connecting rod 13 is hinged to the head of the cylinder 16 near the top, and the tail of the cylinder 16 is hinged to the wire feeding machine platform 2. A counterweight iron plate is fixed above the top of the second connecting rod 13 by welding, thus forming a lever mechanism.

[0043] A wire feeder 1 is provided on the wire feeder platform 2, and the wire feeder 1 outputs the cored wire 7 continuously.

[0044] The spheroidizing bag cover 8 is provided with a smoke exhaust outlet, and a vertical smoke exhaust pipe 19 is fixedly connected to the outside of the smoke exhaust outlet. The bottom end of the vertical smoke exhaust pipe 19 is fixedly connected to the upper surface of the spheroidizing bag cover 8, and the inner cavities of the two are connected. The vertical smoke exhaust pipe 19 is contracted and reduced in diameter near the bottom end.

[0045] The vertical smoke exhaust pipe 19 is sleeved inside the dust removal air duct 5, and the diameter of the vertical smoke exhaust pipe 19 is much smaller than the diameter of the dust removal air duct 5. The top of the dust removal air duct 5 is connected to the bag dust collector 6. During spheroidization, the smoke is sucked away from the smoke exhaust outlet by the dust removal air duct 5 and sent to the bag dust collector 6 for treatment.

[0046] The spheroidizing bag cover 8 is sleeved with the dust removal air duct 5 through a vertical smoke exhaust pipe 19 with a shrinking diameter at the upper part. The shrinking diameter vertical smoke exhaust pipe 19 increases the resistance when the spheroidizing smoke and dust overflows, and reduces the overall speed of the smoke when it overflows compared to the structure without a smoke pipe. Here, the smoke is simplified as an ideal fluid. From the Bernoulli equation, it can be seen that the dynamic pressure of the smoke decreases, the energy remains unchanged, and the static pressure of the smoke will increase. In this way, the smoke in the spheroidizing bag 18 is in a positive pressure state relative to the outside of the bag, thereby improving the absorption rate of the magnesium alloy.

[0047] The spheroidization bag 18 is transported by a rail electric flat car 17 , and the rail electric flat car 17 transports the separation and merging of the spheroidization bag 18 and the spheroidization bag cover 8 .

[0048] Working principle of intelligent spheroidization station:

[0049] The rail electric flat car 17 transports the spheroidizing bag 18 to the vicinity of the predetermined position and decelerates, and stops at the predetermined position after encountering the travel switch;

[0050] The cylinder 16 retracts, and the second connecting rod 13 overcomes the counterweight resistance torque under the self-weight of the front spherical cover 8 and the cover bracket 10, and rotates 30 degrees counterclockwise around the central hinge; in the spatial parallel four-bar mechanism, the connecting rod support 11 and the hinge support seat 14 always maintain a parallel relationship, and the hinge support seat 14 as a part of the frame always maintains a vertical state, so the connecting rod support 11 also maintains a vertical state; during the rotation of the second connecting rod 13, the cover bracket 10 always maintains parallel movement, and in the second connecting rod 13, the cover bracket 10 always maintains parallel movement. When the rod 13 rotates counterclockwise by 30 degrees, the bag cover bracket 10 and the spheroidizing bag cover 8 move horizontally downward to the lowest point. The spheroidizing bag cover 8 just covers the pre-positioned spheroidizing bag 18 at the lowest point. At the lowest point, the distance between the spheroidizing bag cover 8 and the bag cover bracket 10 is shortened, and the short link chain 9 is in a completely relaxed state. In this way, the spheroidizing bag cover 8 is pressed on the spheroidizing bag 18 with its entire deadweight to prevent it from being lifted up by the spheroidizing reaction airflow. After the spheroidizing bag cover 8 covers the spheroidizing bag 18, the wire feeder 1 feeds the wire through the wire feeding tube and starts spheroidization.

[0051] After the spheroidization operation is completed, the cylinder 16 extends, pushing the second connecting rod 13 to overcome the resistance torque of the spheroidization bag cover 8 and the bag cover bracket 10 and rotate clockwise to a horizontal state; under the constraint and drive of the spatial parallel four-bar mechanism, the connecting rod support 11 and the bag cover bracket 10 move the spheroidization bag cover 8 upward to the highest point, and the rail electric flat car 17 can move freely below, and the rail electric flat car 17 outputs the spheroidization bag 18 from the spheroidization position.

[0052] Example 2 Control system of intelligent spheroidization station

[0053] like Figure 3 and Figure 5 As shown together, the present invention provides a control system of an intelligent spheroidizing station, including a weighing wireless transmitting module 20, a weighing wireless receiving module 21, a weight display screen 22, an RS232 communication module 23, a PLC 27, a touch screen 28, an alarm light 29, a length measuring sensor 30, a wire feeding inverter 31, a platform vehicle inverter 32, a wire feeding motor 33 and a platform vehicle motor 34.

[0054] When the medium frequency furnace distributes molten iron to the spheroidizing bag, the molten iron weighing wireless transmitting module 20 sends the molten iron weight signal to the weighing wireless receiving module 21 in real time. The weighing wireless receiving module 21 communicates with PLC27 through the RS232 communication module 23. The output end of the weighing wireless receiving module 21 is connected to the input end of the weight display screen 22, and the weight of the molten iron is displayed on the weight display screen 22.

[0055] The input end of PLC27 is connected to the save button 24, the spheroidization start button 25 and the spheroidization stop button 26, and the output end of PLC27 is electrically connected to the input end of the alarm light 29.

[0056] The output terminal of the length measuring sensor 30 is electrically connected to the input terminal of the PLC 27 .

[0057] The input end of the wire feeding frequency converter 31 is electrically connected to the output end of the PLC 27 , and the output end of the wire feeding frequency converter 31 is electrically connected to the input end of the wire feeding motor 33 .

[0058] The output end of the PLC 27 is electrically connected to the input end of the touch screen 28 , and the output end of the touch screen 28 is electrically connected to the input end of the PLC 27 .

[0059] The functions of the touch screen 28 are: displaying the real-time weight signal, the current real-time wire feeding length, setting the ratio of molten iron weight to wire feeding length, the time of each spheroidization, the amount of molten iron for each spheroidization, the wire feeding line length for each spheroidization and the alarm signal display.

[0060] The input end of the platform vehicle inverter 32 is electrically connected to the output end of the PLC 27 , and the output end of the platform vehicle inverter 32 is electrically connected to the input end of the platform vehicle motor 34 .

[0061] Operation process:

[0062] After the medium frequency furnace has finished distributing the molten iron to the spheroidizing bag, wait until the digital display of the weight display screen 22 is stable, press the save button 24 to save the stabilized molten iron weight in the PLC 27. After the molten iron weight is saved, the alarm light 29 will sound and light alarm, indicating that the data saving is completed. If the saving is unsuccessful, the alarm light 29 will not sound and light alarm;

[0063] When the weight of the molten iron is successfully preserved, the spheroidizing ladle 18 is placed on the rail electric flat car 17, and the platform car inverter 32 controls the platform car motor 34 to run forward;

[0064] When the balling position is reached, the platform vehicle inverter 32 controls the platform vehicle motor 34 to stop rotating forward;

[0065] The spheroidizing bag cover 8 is dropped down and covered on the spheroidizing bag 18 through a four-bar linkage;

[0066] Press the balling start button 25, the wire feeding inverter 31 controls the wire feeding motor 33 to start running, and the balling stop button 26 can be pressed if it needs to be stopped, and the length measuring sensor 30 feeds back the wire feeding length to the PLC 27;

[0067] When the PLC obtains the wire feeding length of the stored molten iron weight that should be spheroidized according to the ratio set by the touch screen 28, the wire feeding inverter 31 controls the wire feeding motor 33 to stop, and the wire feeding is completed;

[0068] The spheroidizing bag cover 8 is translated upward by a four-bar linkage, and the spheroidizing bag 18 is hoisted out.

[0069] The specific working principle of the present invention is:

[0070] The above is an example of the best implementation of the present invention, and the parts not described in detail are common knowledge of ordinary technicians in the field. The protection scope of the present invention shall be based on the content of the claims, and any equivalent transformation based on the technical enlightenment of the present invention is also within the protection scope of the present invention.

Claims

1. An intelligent spheroidizing station, comprising a spheroidizing bag (18), characterized in that: The top of the spheroidizing bag (18) is provided with a spheroidizing bag cover (8) which can be lifted and lowered in translation, and the translational lifting of the spheroidizing bag cover (8) is driven by a space parallel four-bar linkage mechanism driven by the extension and contraction of the cylinder (16); The four-link mechanism comprises a first link (12) and a second link (13) which are arranged in parallel in a vertical direction, wherein the length of the second link (13) is greater than the length of the first link (12); the bottom ends of the first link (12) and the second link (13) are both hingedly connected to a link support (11), and the top end of the first link (12) and the middle part of the second link (13) are both hingedly connected to a hinge support seat (14); The spheroidizing bag cover (8) is provided with a smoke exhaust outlet, and a vertical smoke exhaust pipe (19) is fixedly connected to the outside of the smoke exhaust outlet. The vertical smoke exhaust pipe (19) is configured to be reduced in diameter near the bottom, and the vertical smoke exhaust pipe (19) is sleeved inside the dust removal air duct (5).

2. The intelligent spheroidization station according to claim 1, characterized in that: The connecting rod support (11) is fixedly connected to a horizontally arranged bag cover support (10) via a fastener, and a spheroidized bag cover (8) is horizontally suspended at the bottom of the bag cover support (10) via four short-link chains (9).

3. The intelligent spheroidization station according to claim 1, characterized in that: The hinge support seat (14) is fixed to the bottom end of the channel steel frame (15) by means of fasteners, and the channel steel frame (15) is fixed to the wire feeding machine platform (2).

4. The intelligent spheroidization station according to claim 1, characterized in that: The second connecting rod (13) is hinged to the head of the cylinder (16) at a position close to the top end, and the tail end of the cylinder (16) is hinged to the wire feeding machine platform (2). A counterweight iron plate is fixed above the top end of the second connecting rod (13) by welding.

5. The intelligent spheroidization station according to claim 1, characterized in that: The diameter of the vertical smoke exhaust pipe (19) is smaller than the diameter of the dust removal air duct (5); the top end of the dust removal air duct (5) is connected to the bag filter (6); and the spheroidizing bag (18) is transported by a rail electric flat car (17).

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