A slab scrapper device

Abstract

The utility model discloses a kind of plate blank slag scraping devices, it is related to metallurgical industry continuous casting plate blank production technical field.It includes the slag scraper distributed in the both sides of plate blank width direction, the tail of the scraper is equipped with slag scraper bottom plate, the slag scraper bottom plate is installed on the roll stand through slag scraper support, the tail of the slag scraper bottom plate is connected with counterweight traction rope, the other end of the counterweight traction rope passes through counterweight support and is connected with counterweight block by passing through fixed pulley installed on the counterweight support.The utility model can quickly, safely, automatically to the oxidation scale of plate blank both sides in conveying process due to cooling, carry out slag scraping, make it in solve traditional slag scraper scrape not clean, service life is short, the problem of cumbersome operation, while guaranteeing plate blank quality and measuring width accuracy to reduce plate blank subsequent continuous temperature measurement error and influence on rolling quality.

Description

Technical Field

[0001] This utility model relates to the field of continuous casting slab production technology in the metallurgical industry, and in particular to a device for removing iron oxide scale from the surface of continuous casting slabs. Background Technology

[0002] In the steel industry, continuous casting technology, as a key link in the modern steel production process, plays a vital role in improving steel production efficiency and optimizing product quality. In recent years, most large steel mills both domestically and internationally have equipped themselves with continuous casting machines, which are mainly divided into two categories: billet continuous casting machines and slab continuous casting machines. With the steel industry's increasingly stringent requirements for steel performance and the continuous improvement and upgrading of molten steel composition, the production requirements for slabs have become increasingly stringent. High-quality slab production relies heavily on advanced equipment. As the core equipment for slab production, the slab continuous casting machine has a complex and crucial structure, mainly including casting equipment (such as ladle transport equipment, tundish and tundish trolley or rotary table), a crystallizer and its vibration device, bending section, fan-shaped section, straightening section, horizontal section, cutting equipment (such as a flame cutter), roller conveyor system, and billet discharge equipment.

[0003] Iron oxide scale is a significant challenge in slab production. It is extremely common on the surface of hot-rolled products, and if not removed promptly, it will be pressed into the surface during subsequent processing, inevitably causing product quality defects, severely affecting the product's appearance and performance, and negatively impacting the company's economic benefits. Furthermore, to ensure product quality and production stability, online real-time width measurement of the slab is necessary during production. However, iron oxide scale on the slab surface significantly interferes with the measurement accuracy, reducing the precision of the results. Therefore, removing iron oxide scale as much as possible during slab production is crucial for ensuring slab quality and measurement accuracy.

[0004] Traditional methods for removing iron oxide scale from slabs typically employ a steel plate and spring structure for scraping. Specifically, two steel plates are installed along the slab's conveying path to scrape away the iron oxide scale from both sides. While this traditional method can remove iron oxide scale to some extent, it has revealed several problems in practical application. First, the steel plate scraping method lacks flexibility; for uneven surfaces, it can only scrape partial areas, failing to achieve full coverage and resulting in incomplete scale removal, affecting the slab's surface quality. Second, the spring, a key component of traditional scrapers, experiences a significant decrease in elasticity after prolonged use in high-temperature environments. This is because the physical properties of the spring material change under high-temperature baking, weakening its elasticity and rendering it ineffective at scraping, necessitating replacement. This not only increases equipment maintenance costs but also impacts production efficiency. Furthermore, the spring in traditional scrapers is mounted on one side, limiting the scraper's movement to one direction. During the feeding and positioning process, due to the scraper's unidirectional movement, it must be removed to perform the feeding and positioning operations correctly, increasing operational complexity and reducing the level of automation in production.

[0005] In summary, there is currently a lack of devices, both domestically and internationally, in the field of slab oxide scale removal that can quickly, safely, and automatically scrape slag from both sides of the slab. Summary of the Invention

[0006] This utility model provides a slab slag scraping device, which can quickly, safely and automatically scrape the iron oxide scale generated on both sides of the slab during the conveying process due to cooling. It solves the problems of traditional slag scrapers, such as incomplete scraping, short service life and cumbersome operation, while ensuring slab quality and width measurement accuracy, thereby reducing the subsequent continuous temperature measurement error of the slab and its impact on rolling quality.

[0007] To solve the above problems, the technical solution adopted by this utility model is:

[0008] The slab is conveyed by a roller conveyor device, which includes a roller support and rollers mounted on the roller support. The slab scraping device includes scrapers distributed on both sides of the slab width direction. The tail of the scraper is provided with a scraper base plate, which is mounted on the roller support through the scraper support. The tail of the scraper base plate is connected to a counterweight traction rope, and the other end of the counterweight traction rope passes through the counterweight support and around the fixed pulley mounted on the counterweight support to connect to a counterweight block.

[0009] A more specific technical solution than the above-mentioned technical solution is that the scraper bracket is a rotatable scraper bracket.

[0010] Furthermore, the scraper support includes an upper support and a lower support. The upper end of the upper support is fixedly installed on the scraper base plate, and the lower end of the upper support is sleeved inside the upper end of the lower support and can rotate horizontally relative to the lower support. The lower end of the lower support is fixedly installed on the roller conveyor support.

[0011] Furthermore, the scraper is composed of multiple scraping steel wire ropes.

[0012] Furthermore, the diameter of the scraper wire rope is 20mm.

[0013] Furthermore, the counterweight traction rope is a steel wire rope with a diameter of 10 mm.

[0014] Furthermore, the installation height of the fixed pulley is consistent with the connection height of the counterweight traction rope at the tail of the scraper bottom plate.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0016] 1. This utility model mainly uses the gravity of the counterweight in conjunction with a slag scraper to quickly, safely and automatically remove iron oxide scale from slabs. This solves the problems of traditional slag scrapers, such as incomplete removal, short service life and cumbersome operation, while ensuring slab quality and width measurement accuracy, thereby reducing subsequent continuous temperature measurement errors and their impact on rolling quality.

[0017] 2. This utility model designs the slag scraper bracket to be rotatable, which drives the slag scraper to rotate, thereby dealing with slabs of different widths and automatically adjusting the slag scraping according to the width of the slab.

[0018] 3. The slag scraper of this utility model is composed of multiple scraping steel wire ropes. Due to the elasticity of the steel wire ropes, they can automatically adjust the degree of bending according to the actual contour and undulation of the side of the red billet (i.e., slab). When the red billet passes by, these steel wire ropes will closely fit its side, forming an all-round, no-dead-angle coverage, ensuring that every piece of iron oxide scale can be effectively scraped off. This elastic coverage characteristic greatly improves the comprehensiveness and thoroughness of slag scraping, significantly enhances the slag scraping effect, and provides a strong guarantee for the high-quality production of slabs.

[0019] 4. This utility model eliminates the traditional spring tension and uses a counterweight connected by a traction steel wire rope (i.e., using gravity to replace elastic force) to drive the scraper for scraping operations. This not only ensures sufficient force but also avoids the impact of high-temperature environments on spring performance, reduces equipment failures caused by spring fatigue and deformation, and significantly improves the service life of the scraping device.

[0020] 5. This utility model designs the connection point between the traction steel wire rope and the bottom plate of the scraper at the tail of the scraper bottom plate, so that the scraper can perform bidirectional scraping motion, realizing fully automatic scraping operation without human intervention. This effectively solves the problem of unidirectional movement of traditional scrapers while reducing the labor intensity of personnel. Attached Figure Description

[0021] Figure 1 This is the front view of the present invention.

[0022] Figure 2 This is a top view of the present invention.

[0023] Figures 1-2 In the diagram, the following labels represent the components: 1 – Roller conveyor device, 1-1 – Roller support, 1-2 – Roller, 2 – Scraper, 3 – Scraper base plate, 4 – Scraper support, 4-1 – Upper support, 4-2 – Lower support, 5 – Counterweight traction rope, 6 – Counterweight support, 7 – Fixed pulley, and 8 – Counterweight block. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings: Example

[0025] like Figure 1-2 The diagram illustrates a slab scraping device. The slab is conveyed via a roller conveyor 1, which includes a roller support 1-1 and rollers 1-2 mounted on the support 1-1. The slab scraping device includes scrapers 2 distributed on both sides of the slab's width. A scraper base plate 3 is located at the tail of each scraper 2. The scraper base plate 3 is mounted on the roller support 1-1 via a scraper support 4. A counterweight traction rope 5 is connected to the tail of the scraper base plate 3. The other end of the counterweight traction rope 5 passes through a counterweight support 6 and around a fixed pulley 7 mounted on the support 6, connecting to a counterweight block 8. The counterweight block 8 is at a certain distance from the ground and can move up and down. Because the counterweight traction rope 5 is connected to the tail of the scraper base plate 3, the scraper 2 can perform bidirectional scraping, achieving fully automated scraping without human intervention. This effectively solves the problem of unidirectional movement in traditional scrapers while reducing labor intensity. In addition, the fixed pulley 7 is installed on the counterweight bracket 6, and the bottom of the counterweight bracket 6 can be connected to the ground through expansion screws to ensure that there will be no insufficient strength during use.

[0026] In the above technical solution, the red billet (i.e., slab) moves towards the billet exit direction. When the red billet encounters the slag scraper 2, the slag scraper 2 (e.g., slag scraping wire rope) moves together with the red billet under the force of the red billet. After moving to a certain angle, the red billet continues to move forward through the slag scraper 2. Under the gravity of the counterweight 8, the slag scraper 2 begins to quickly, safely, and automatically scrape off the iron oxide scale on the surface of the red billet. This solves the problems of traditional slag scrapers, such as incomplete scraping, short service life, and cumbersome operation, while ensuring the quality of the slab and the accuracy of width measurement. This reduces the subsequent continuous temperature measurement error of the slab and its impact on the rolling quality.

[0027] Meanwhile, the above technical solution eliminates the traditional spring tension and uses a counterweight block 8 connected by a counterweight traction rope 5 (i.e., using gravity to replace elastic force) to drive the scraper 2 to perform scraping operations. This not only ensures sufficient force but also avoids the impact of high temperature environment on spring performance, reduces equipment failures caused by spring fatigue and deformation, and significantly improves the service life of the scraping device.

[0028] Preferably, the scraper bracket 4 is designed as a rotatable scraper bracket. With this design, the scraper can be rotated by the rotation of the scraper bracket 4 to perform rotational operation, thereby dealing with slabs of different widths and automatically adjusting the scraping according to the width of the slab.

[0029] Preferably, the scraper bracket 4 can be designed to include an upper bracket 4-1 and a lower bracket 4-2. The upper end of the upper bracket 4-1 is fixedly installed on the scraper base plate 3, and the lower end of the upper bracket 4-1 is sleeved inside the upper end of the lower bracket 4-2 and can rotate horizontally relative to the lower bracket 4-2. The lower end of the lower bracket 4-2 is fixedly installed on the roller support 1-1.

[0030] Because the shape of the red billet is not perfectly regular and its surface condition is complex and variable during the conveying process, traditional scrapers often struggle to closely adhere to the side of the billet, resulting in incomplete removal of iron oxide scale in some areas. Therefore, preferably, the scraper 2 can be designed to consist of multiple vertically arranged scraping steel wire ropes. Due to the elasticity of the steel wire ropes, they can automatically adjust their bending degree according to the actual contour and undulation of the red billet's side. As the red billet passes by, these steel wire ropes will closely adhere to its side, forming a comprehensive and thorough coverage, ensuring that every area of ​​iron oxide scale is effectively scraped off. This elastic coverage characteristic greatly improves the comprehensiveness and thoroughness of scraping, significantly enhancing the scraping effect and providing a strong guarantee for high-quality slab production.

[0031] Preferably, the diameter of the slag scraping wire rope can be designed to be 20mm.

[0032] Preferably, the counterweight traction rope 5 can be a steel wire rope with a diameter of 10 mm, thereby preventing breakage during use.

[0033] Preferably, the scraper base plate 3 can be designed to consist of two clamping plates, and the scraper base plate 3 fixes the tail of the scraper 2 through these two clamping plates and screws.

[0034] Preferably, the installation height of the fixed pulley 7 can be designed to be consistent with the connection height of the counterweight traction rope 5 at the tail of the scraper bottom plate 3. This design has two advantages: first, it reduces the additional prestress caused by the diagonal tension due to the height difference, preventing the counterweight traction rope 5 from wearing or breaking due to excessive local stress, thereby extending the service life of the counterweight traction rope 5 and reducing equipment maintenance costs; second, it ensures that the counterweight traction rope 5 is evenly stressed, keeping it in a stable stress state, ensuring that the scraper 2 can operate smoothly and accurately, and improving the reliability and stability of the scraping operation.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A slab scraping device, wherein the slab is conveyed by a roller conveyor, the roller conveyor comprising a roller support and rollers mounted on the roller support, characterized in that: It includes slag scrapers distributed on both sides of the slab width direction. The tail of the slag scraper is provided with a slag scraper base plate. The slag scraper base plate is mounted on the roller support through a slag scraper bracket. The tail of the slag scraper base plate is connected to a counterweight traction rope. The other end of the counterweight traction rope passes through a counterweight bracket and goes around a fixed pulley mounted on the counterweight bracket to connect to a counterweight block.

2. The slab scraping device according to claim 1, characterized in that: The scraper support is a rotatable scraper support.

3. The slab scraping device according to claim 2, characterized in that: The scraper support includes an upper support and a lower support. The upper end of the upper support is fixedly installed on the scraper base plate, and the lower end of the upper support is sleeved inside the upper end of the lower support and can rotate horizontally relative to the lower support. The lower end of the lower support is fixedly installed on the roller support.

4. The slab scraping device according to claim 1, 2, or 3, characterized in that: The slag scraper consists of multiple slag scraping steel wire ropes.

5. The slab scraping device according to claim 4, characterized in that: The diameter of the scraper wire rope is 20mm.

6. The slab scraping device according to claim 5, characterized in that: The counterweight traction rope is a steel wire rope with a diameter of 10 mm.

7. The slab scraping device according to claim 6, characterized in that: The installation height of the fixed pulley is consistent with the connection height of the counterweight traction rope at the tail of the scraper bottom plate.

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