Ratchet wheel type oxygen lance slag scraper

Abstract

The invention discloses a ratchet wheel type oxygen lance slag scraper which can improve a slag scraping effect and prolong service life. The ratchet wheel type oxygen lance slag scarper comprises two symmetrically arranged cylinders, two symmetrically arranged bearing block groups, two symmetrically arranged slag scraping ratchet wheel groups, wherein the cylinders are hinged to a cylinder support, a connecting shaft is arranged in each of the two bearing block groups, each slag scraper ratchet wheel group at least comprises two slag scraper ratchet wheels, and a pin shaft is in clearance fit with the slag scraping ratchet wheels. The ratchet wheel type oxygen lance slag scraper has the advantages that multiple slag scraper ratchet wheels are arranged, so that multiple force bearing points are formed on steel slag on the outer wall of an oxygen lance, and therefore the steel slag can be crushed very well, the slag scraping effect is improved; in addition, since the slag scraper ratchet wheels can rotate, the slag scraper ratchet wheels rotate when too much steel slag is adhered, fracture of a steel wire rope or damage of equipment can be avoided, and service lives of related equipment such as the ratchet wheel type oxygen lance slag scraper and the oxygen lance are prolonged.

Description

technical field [0001] The invention relates to a ratchet type oxygen lance slag scraper. Background technique [0002] Oxygen lance is one of the key equipments in converter steelmaking. It is responsible for blowing oxygen into the molten pool in the converter during blowing and blowing nitrogen into the converter after blowing to protect the furnace lining by splashing slag. Oxygen lance will inevitably adhere to steel slag on the outer steel pipe of the oxygen lance during blowing and slag splashing to protect the furnace. The steel slag is getting thicker and thicker, and in severe cases, the oxygen lance cannot be raised and lowered normally. If the forced operation will burn the oxygen lance lifting motor or break the steel wire rope, at this time, the oxygen lance that has stuck to the slag can only be cut off with a flame cutter, and the cut oxygen lance can be removed and replaced with a new oxygen lance. Therefore, the service life of the oxygen lance is greatly...

AI Technical Summary

Problems solved by technology

However, the complexity of the oxygen lance operation will inevitably lead to the mixture of steel slag on the oxygen lance, sometimes even a layer of steel and a layer of slag. In this case, it is difficult for the existing oxygen lance slag scraper to scrape off the steel slag adhered to the oxygen lance

[0006] There are two types of automatic slag scraping equipment at present, such as figure 1 As shown, the mechanical arm pushes and pulls the slag scraper head towards or away from the oxygen lance through the horizontal push and pull of the cylinder. When the slag scraper with this structure is seriously sticky, the oxygen lance can not be lifted up to scrape off the steel slag on the oxygen lance. , the cutter head of the slag scraper will not retreat, which will cause the following two consequences: one is that the slag scraper is separated from the oxygen lance when the screw or cylindrical pin fixing the slag scraper is broken, and the other is that the lifting device of the oxygen lance is broken In severe cases, the steel wire rope of the oxygen lance is broken and the serious safety equipment accident caused by the oxygen lance falling

The other is a self-protected oxygen lance slag scraper, such as figure 2 As shown, when the oxygen lance slag scraper with this structure is seriously sticky to the slag, and the oxygen lance is lifted upwards and the steel slag cannot be scraped off, the torque of the oxygen lance lifting the slag scraper head is greater than that of the mechanical arm of the slag scraper. When the torque generated by the cylinder pressure, the slag scraper cutter will slide on the steel slag surface of the oxygen lance without breaking the wire rope, but it cannot scrape off the steel slag adhered to the oxygen lance

[0007] It can be seen that the current automatic slag scraper cannot effectively scrape off the steel slag adhering to the oxygen lance when it encounters steel slag mixed or a layer of steel slag on the oxygen lance, which affects the normal operation of the oxygen lance, and even cause serious safety accidents

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