Intelligent feeding device and method for zinc ingot

Abstract

The application discloses a kind of zinc ingot intelligent feeding device and method, and base and pushing platform are connected by lifting support, lifting support is arranged and middle part is hinged in X type, one end of lifting support is connected with hinged seat, the other end of lifting support is installed sliding bolt, and sliding bolt slides in slide rail;One end of jacking oil cylinder is hinged with base or pushing platform, and the other end of jacking oil cylinder is hinged with lifting support;Pushing platform surface installs pushing oil cylinder, pushing rod passes through pushing oil cylinder, and the end of pushing rod is provided with pushing shovel, and the tail of pushing rod is provided with lifting limiter;Jacking oil cylinder, lifting limiter, pushing oil cylinder, non-contact height detector and contact digital height gauge are controlled by programmable logic controller;When working, programmable logic controller controls jacking oil cylinder to lift, detects single spacing by lifting limiter, stops working after reaching set value;Then start pushing oil cylinder, and zinc sheet is pushed into discharge hopper.

Description

Technical Field

[0001] This invention relates to the field of non-ferrous metal smelting, specifically to an intelligent feeding device and method for zinc ingots. Background Technology

[0002] Zinc ingot casting systems commonly employ induction furnaces and ladle casting, such as Figure 1 As shown, the system includes an induction furnace 1, a hopper 9 on top of the furnace 1, and a casting device on one side. The casting device includes a mold 11 running on a conveyor platform, a ladle 10 connected to a motor, and a pouring port at the bottom of the ladle 10 located above the mold 11. This zinc ingot casting system melts zinc sheets in an induction furnace and achieves casting by controlling the rotation of the ladle with a motor.

[0003] However, ladle casting requires a high liquid level in the induction furnace. The zinc sheet slides into the furnace from a height, causing surges and large fluctuations in the liquid level. When the liquid level in the induction furnace is high, molten zinc easily overflows from the ladle position, and the cast zinc ingots have significant positive deviations, resulting in waste. When the liquid level in the induction furnace is low, the cast zinc ingots are not fully filled. Furthermore, when the zinc sheet melts, a large amount of oxide slag floats on the surface of the molten zinc. The oxide slag on the surface of the molten zinc and the surges during feeding are bottlenecks in detecting the actual liquid level in the furnace. Currently, manual feeding is commonly used in China, with manual observation of the fullness of the cast zinc ingots to determine the frequency and amount of feeding. Summary of the Invention

[0004] To address the issues of manual feeding and observation, this invention provides an intelligent feeding device and method for zinc ingots, which determines the feeding frequency and amount based on the actual working conditions of manually observing the fullness of the zinc ingot casting.

[0005] A smart feeding device for zinc ingots includes a base 15 and a pushing platform 16. The base 15 and the pushing platform 16 are connected by a lifting bracket 3. The lifting bracket 3 is X-shaped and hinged in the middle. One end of the lifting bracket 3 is connected to a hinge seat 17, and the other end of the lifting bracket 3 is equipped with a sliding bolt 4, which slides within a slide rail 18. One end of a lifting cylinder 2 is hinged to the base 15 or the pushing platform 16, and the other end of the lifting cylinder 2 is connected to the lifting platform 16. The bracket 3 is hinged; a pushing cylinder 19 is installed on the surface of the pushing platform 16, a pushing rod 6 passes through the pushing cylinder 19, a pushing shovel 7 is provided at the end of the pushing rod 6, and a lifting limiter 5 is provided at the tail of the pushing rod 6; a non-contact height detector 12 and a contact digital display height meter 14 are installed on the conveying platform of the mold 11; the lifting cylinder 2, the lifting limiter 5, the pushing cylinder 19, the non-contact height detector 12, and the contact digital display height meter 14 are controlled by a programmable logic controller 13.

[0006] A method for intelligent feeding of zinc ingots, the specific method of which is as follows:

[0007] A1: Set the feeding cycle on the programmable logic controller 13 to be equal to the casting cycle of the ladle 10; set the standard thickness h of the liquid zinc ingot measured by the non-contact height detector 12, and the thickness of the qualified zinc ingot is h±δ.

[0008] A2: Set the single-time limit interval of the lifting limiter 5 so that the single-time feeding weight of the zinc sheet 8 is approximately equal to the single-time casting weight;

[0009] A3: Casting begins; the ladle 10 is rotated via a motor to carry out the casting.

[0010] A4: The non-contact height detector 12 detects the thickness X of the liquid zinc ingot inside the mold 11 and compares X with h;

[0011] A5: If X≤h-δ, then the intelligent feeding device for zinc ingots performs two feedings within a single casting cycle;

[0012] A6: h-δ<X<h+δ, then the intelligent feeding device for zinc ingots performs one feeding operation within a single casting cycle;

[0013] A7: If X≥h+δ, then the intelligent feeding device for zinc ingots will not perform feeding within a single casting cycle;

[0014] A8: When the mold 11 moves to the bottom of the contact digital display height meter 14 on the conveyor platform, the liquid zinc ingot inside the mold 11 cools and solidifies. At this time, the height H of the zinc ingot is detected by the contact digital display height meter 14.

[0015] A9: Based on the comparison of H and X, calibrate the zero point h0 of the non-contact height detector 12:

[0016] h0 = HX.

[0017] Advantages of this invention:

[0018] 1. The intelligent zinc ingot feeding device of the present invention has a simple structure and a high degree of intelligence, realizing continuous and uniform feeding of the induction furnace, reducing product quality problems and energy waste caused by furnace temperature fluctuations;

[0019] 2. When X≤h-δ, it indicates that the liquid level in the induction furnace is low, and two feeding operations are required; when X≥h+δ, it indicates that the liquid level in the induction furnace is high, and no feeding operation is required.

[0020] 3. Because non-contact height detectors are easily affected by high temperatures, dust, and vibrations on site, their working stability is poor. To ensure their stability, it is necessary to calibrate their detection data X: H is detected by a contact digital display height meter, which is used to calibrate the zero position of the non-contact height detector. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 Schematic diagram of zinc ingot thickness detection according to the present invention;

[0023] Figure 3 A schematic diagram of the lowest position of the intelligent zinc ingot feeding device of the present invention;

[0024] Figure 4 This is a schematic diagram of the contact-type digital display altimeter of the present invention;

[0025] Figure 5 This is a schematic diagram of the intelligent feeding method for zinc ingots according to the present invention;

[0026] In the diagram: 1-Induction furnace; 2-Lifting cylinder; 3-Lifting bracket; 4-Sliding bolt; 5-Lifting limiter; 6-Push rod; 7-Push shovel; 8-Zinc sheet; 9-Feeding hopper; 10-Ladle; 11-Mold; 12-Non-contact height detector; 13-Programmable logic controller; 14-Contact digital height indicator; 15-Base; 16-Pushing platform; 17-Hinged seat; 18-Slide rail; 19-Pushing cylinder. Detailed Implementation

[0027] Example 1

[0028] A zinc ingot intelligent feeding device includes a base 15 and a pushing platform 16, which are connected by a lifting bracket 3. The lifting bracket 3 is X-shaped and hinged in the middle. One end of the lifting bracket 3 is connected to a hinge seat 17, and the other end of the lifting bracket 3 is equipped with a sliding bolt 4, which slides in a slide rail 18. One end of a lifting cylinder 2 is hinged to the base 15 or the pushing platform 16, and the other end of the lifting cylinder 2 is hinged to the lifting bracket 3. A pushing cylinder 19 is installed on the surface of the pushing platform 16, and a pushing rod 6 passes through the pushing cylinder 19. A pushing shovel 7 is provided at the end of the pushing rod 6, and a lifting limiter 5 is provided at the tail of the pushing rod 6. A non-contact height detector 12 and a contact digital display height meter 14 are installed on the conveying platform for conveying the mold 11. The lifting cylinder 2, the lifting limiter 5, the pushing cylinder 19, the non-contact height detector 12, and the contact digital display height meter 14 are controlled by a programmable logic controller 13.

[0029] During operation, the programmable logic controller 13 controls the lifting cylinder 2 to rise and fall. The lifting limit switch 5 detects the single limit distance. After reaching the set value, the lifting cylinder 2 stops working. Then, the pushing cylinder 19 is started to push the zinc sheet 8 into the feeding hopper 9 to complete the feeding.

[0030] A smart feeding method for zinc ingots is as follows:

[0031] A1: Set the feeding cycle on the programmable logic controller 13 to be equal to the casting cycle of the ladle 10; set the standard thickness h of the liquid zinc ingot measured by the non-contact height detector 12, and the thickness of the qualified zinc ingot is h±δ.

[0032] A2: Set the single-time limit interval of the lifting limiter 5 so that the single-time feeding weight of the zinc sheet 8 is approximately equal to the single-time casting weight;

[0033] A3: Casting begins; the ladle 10 is rotated via a motor to carry out the casting.

[0034] A4: The non-contact height detector 12 detects the thickness X of the liquid zinc ingot inside the mold 11 and compares X with h;

[0035] A5: If X≤h-δ, then the intelligent feeding device for zinc ingots performs two feedings within a single casting cycle;

[0036] A6: h-δ<X<h+δ, then the intelligent feeding device for zinc ingots performs one feeding operation within a single casting cycle;

[0037] A7: If X≥h+δ, then the intelligent feeding device for zinc ingots will not perform feeding within a single casting cycle;

[0038] A8: When the mold 11 moves to the bottom of the contact digital display height meter 14 on the conveyor platform, the liquid zinc ingot inside the mold 11 cools and solidifies. At this time, the height H of the zinc ingot is detected by the contact digital display height meter 14.

[0039] A9: Based on the comparison of H and X, calibrate the zero position h0 of the non-contact height detector 12: h0 = HX.

[0040] Taking a 100,000-ton / year zinc ingot casting line as an example, a single zinc ingot weighs 25kg, and four zinc ingots are cast at a time, with a casting cycle of 15s; while a single zinc sheet weighs 50kg and is 30mm thick, and two zinc sheets are needed for each casting.

[0041] A1: Set the feeding cycle to 15s on the programmable logic controller, set the standard thickness h of the liquid zinc ingot measured by the non-contact height detector to 50mm, and the thickness of the qualified zinc ingot to 50mm±2mm.

[0042] A2: Set the single limit interval of the lifting limit device to 60mm;

[0043] A3: Casting begins, automatic feeding;

[0044] A4: Non-contact height measuring instrument for measuring zinc ingot thickness X;

[0045] If A5:X≤48mm, the intelligent feeding device for zinc ingots will perform two feedings within a single casting cycle.

[0046] A6: 48mm < X < 52mm, then the intelligent feeding device for zinc ingots will perform one feeding operation within a single casting cycle;

[0047] A7: If X≥52mm, the intelligent feeding device for zinc ingots will not perform feeding within a single casting cycle;

[0048] A8: Contact digital display height gauge for detecting zinc ingot height H;

[0049] A9: Based on the comparison between H and X, calibrate the zero point h0 of the non-contact height detector:

[0050] h0 = HX.

[0051] If the non-contact height gauge measures a zinc ingot thickness X = 50 mm, while the contact digital height gauge measures a zinc ingot height H = 51 mm, then the zero point h0 of the non-contact height gauge should be calibrated to 1 mm.

[0052] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An intelligent feeding device for zinc ingots, characterized in that: The intelligent zinc ingot feeding device includes a base and a pushing platform, which are connected by a lifting bracket. The lifting bracket is X-shaped and hinged in the middle. One end of the lifting bracket is connected to a hinged seat, and the other end of the lifting bracket is equipped with a sliding bolt that slides within a slide rail. One end of a lifting cylinder is hinged to the base or the pushing platform, and the other end of the lifting cylinder is hinged to the lifting bracket. A pushing cylinder is installed on the surface of the pushing platform, and a pushing rod passes through the pushing cylinder. A pushing shovel is installed at the end of the pushing rod, and a lifting limiter is installed at the tail of the pushing rod. A non-contact height detector and a contact digital height display are installed on the conveying platform for conveying the casting mold. The lifting cylinder, lifting limiter, pushing cylinder, non-contact height detector, and contact digital height display are controlled by a programmable logic controller. The intelligent feeding method for zinc ingots in the intelligent zinc ingot feeding device is as follows: A1: Set the feeding cycle on the programmable logic controller to be equal to the casting cycle of the ladle; set the standard thickness h of the liquid zinc ingot measured by the non-contact height detector, and the thickness of the qualified zinc ingot is h±δ; A2: Set the single limit interval of the lifting limit device so that the weight of the zinc sheet added in one go is approximately equal to the weight of the casting in one go; A3: Casting begins; the ladle is rotated by a motor to carry out the casting. A4: A non-contact height detector measures the thickness X of the liquid zinc ingot inside the mold and compares X with h; A5: If X≤h-δ, then the intelligent feeding device for zinc ingots performs two feedings within a single casting cycle; A6: h-δ<X<h+δ, then the intelligent feeding device for zinc ingots performs one feeding operation within a single casting cycle; A7: If X≥h+δ, then the intelligent feeding device for zinc ingots will not perform feeding within a single casting cycle; A8: When the mold moves on the conveyor platform to below the contact digital display height meter, the liquid zinc ingot inside the mold cools and solidifies. At this time, the height H of the zinc ingot is detected by the contact digital display height meter. A9: Based on the comparison of H and X, calibrate the zero point h0 of the non-contact height detector: h0=HX.

Images