CN211708094U

CN211708094U - External sleeve of automatic ladle drainage device

Info

Publication number: CN211708094U
Application number: CN201922146845.2U
Authority: CN
Inventors: 程卓
Original assignee: Xixia County Xinyue Metallurgical Materials Development Co ltd
Current assignee: Xixia County Xinyue Metallurgical Materials Development Co ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-10-20
Anticipated expiration: 2029-12-04

Abstract

The utility model discloses an automatic drainage device outside sleeve pipe of ladle has the thin-walled steel cylinder of splendid attire drainage sand, thin-walled steel cylinder upper end is sealed, and the lower extreme is uncovered structure, adopts low temperature to melt plastics and seals thin-walled steel cylinder lower extreme, thin-walled steel cylinder is equipped with two rectangular holes side by side along length direction on stretching out the lateral wall of ladle bottom part, contained angle between two rectangular holes is 85~95 degrees, and low temperature melts plastics and seals two rectangular holes. Compared with the prior art, the utility model discloses can make the drainage sand fill full drainage stick and mouth of a river brick cup space, it is high to open the casting rate, easy operation, the material that economizes on labour.

Description

External sleeve of automatic ladle drainage device

Technical Field

The utility model belongs to the technical field of the ladle drainage, concretely relates to automatic drainage device external sleeve pipe of ladle.

Background

Ladle drainage is a key technology in steel smelting, and the traditional method generally adopts a ladle nozzle to fill drainage sand to realize drainage casting, and is called as a sand pouring method. When the drainage sand is not automatically drained, oxygen guns are used for blowing to perform forced casting, but oxygen-enriched blowing can increase the oxygen content of molten steel to degrade steel, and production can be stopped if the blowing time is too long or the blowing casting fails. Therefore, the automatic drainage rate is an important index for evaluating the quality of the drainage agent. The drainage sand with excellent performance and high automatic drainage rate can realize full-protection pouring in the whole continuous casting process, and ensure the smoothness of a continuous casting production system. The problems of poor stability of the casting rate, complex sand casting process, difficult mastering of field operation, high labor intensity of workers and high cost generally exist in the prior art of drainage casting by the traditional sand casting method.

In order to solve the problems, in the prior art, an automatic ladle drainage device is adopted, such as the automatic ladle drainage device provided in application publication No. CN 104827019A application publication No. 2015.08.12, and the automatic ladle drainage device comprises a cylinder body and a drainage material, wherein the drainage material is of a single-layer or multi-layer structure, the cylinder body is a prefabricated thin-wall steel part, the top of the cylinder body is sealed by adopting prefabricated thin-wall steel, and the bottom of the cylinder body is sealed by adopting hard low-temperature melting plastic. The invention discloses a steel ladle automatic drainage device applied to a steel making system, which has the technical key point that a round cylinder body with one closed end is formed by inserting one cylinder into another cylinder with a slightly larger diameter and is connected, one or more side holes are formed in the side surface of the cylinder body, and drainage sand is filled in the cylinder body. The side hole is sealed by a thin sheet or a thin film with the use temperature of 40-1200 ℃; when the automatic drainage device is used, the automatic drainage device is inserted along a ladle nozzle, and the drainage sand in the cylinder can automatically fill the space in the upper nozzle and the brick cup along with the erection of the ladle. Because there is certain gap between drainage stick and the mouth of a river, a conical space between drainage stick and the mouth of a river brick, two above-mentioned patent drainage devices are at the in-process that the ladle was erect, the drainage sand can not be filled up this toper space completely, generally pile up in one side more, when the ladle was erect, be located ladle bottom one side high temperature slag stream flow in not filling up full-filled toper space, can cause drainage sand sinter bed thickening deepening, when beginning the pouring, the hydrostatic pressure does not break the sinter bed, lead to the ladle can not automatic drainage. At present, the requirement on the quality of molten steel is increasingly improved, the automatic drainage of the steel ladle is the most basic requirement on drainage sand or a drainage device, because if the steel ladle cannot be automatically drained, oxygen is required to be burnt, secondary oxidation of the molten steel is aggravated, inclusions are increased, the quality of the molten steel is influenced, the potential safety hazard of oxygen burning operators is greatly increased, and the normal production rhythm is disturbed.

SUMMERY OF THE UTILITY MODEL

For solving the above-mentioned defect that prior art exists, the utility model aims to provide an automatic drainage device outside sleeve pipe of ladle can make the drainage sand fill full drainage stick and mouth of a river brick cup space, and it is high to start the casting rate, and easy operation saves labour the province material.

In order to achieve the above object, the utility model adopts the following technical scheme: this automatic drainage device of ladle external sleeve pipe, its characterized in that: the ladle is provided with a thin-wall steel cylinder for containing drainage sand, the upper end of the thin-wall steel cylinder is closed, the lower end of the thin-wall steel cylinder is of an open structure, low-temperature melting plastic is adopted to seal the lower end of the thin-wall steel cylinder, two strip holes are arranged on the side wall of the thin-wall steel cylinder extending out of the bottom of the ladle in parallel along the length direction, the included angle between the two strip holes is 85-95 degrees, and the low-temperature melting plastic seals the two strip holes.

Preferably, the included angle between the two elongated holes is 90 degrees.

Preferably, the length of the two elongated holes is 200-400 mm.

Preferably, the outer diameter of the thin-wall steel cylinder is 1-10 mm smaller than the inner diameter of the ladle nozzle.

Preferably, the height of the thin-wall steel cylinder extending out of the bottom of the steel ladle is 100-700 mm.

Adopt above-mentioned technical scheme's beneficial effect: the external sleeve of the automatic ladle drainage device is used for containing drainage sand, the external sleeve is a thin-wall steel cylinder, two strip holes are arranged on the side wall of the thin-wall steel cylinder extending out of the bottom of a ladle in parallel along the length direction, and the included angle between the two strip holes is 85-95 degrees. When the ladle is flat fallen, insert into water with ladle automatic drainage device, two rectangular holes up, close the slide, if along with the ladle from the right side erect the in-process, because of high temperature in the ladle, melt plastics with the low temperature that two rectangular hole seals and melt, the drainage sand on two rectangular hole upper portions flows through the rectangular hole in the steel cylinder, just in time flows the space on mouth of a river seat brick side to the right side earlier, when the steel cylinder is vertical state, the drainage sand flows in the mouth of a river seat brick space of left side and front and back both sides to fill whole toper space. As the conical space on the right side is filled with the drainage sand, the liquid steel slag flowing back in the erecting process cannot flow into the conical space, the problem that the casting cannot be performed due to the fact that the steel slag flows into the conical space easily in the prior art is solved, and the casting rate is improved. The outer diameter of the thin-wall steel cylinder is 1-10 mm smaller than the inner diameter of the ladle nozzle, so that the steel cylinder can be smoothly and tightly inserted into the nozzle from the bottom of the ladle. The length of the two strip holes is 200-400 mm, the height of the thin-wall steel cylinder extending out of the bottom of the steel ladle is 100-700 mm, and the drainage sand in the steel pipe can be used for uniformly filling the water gap of the conical brick cup to form an arch height, so that the waste of the drainage sand is reduced, and the cost is saved.

The action mechanism of the drainage material is as follows: at the initial stage of pouring molten steel into a ladle, the drainage material filled on the upper surface of the water gap is rapidly sintered to block the penetration of molten steel, and a sintered layer can bear the static pressure of the molten steel without being damaged under the support of lower materials; meanwhile, the sintering speed of the materials is slowed down, the sintering layer is kept at a certain thickness, the fusible film for sealing the lower opening of the steel cylinder is heated and melted, the sliding water gap is opened, the drainage sand in the steel cylinder falls under the action of self weight, the sintering layer loses support, the sintering layer is broken under the action of static pressure of molten steel, the molten steel flows out, automatic drainage is formed, and casting is achieved. The utility model discloses a top and bottom are sealed completely, can avoid the drainage sand in the steel cylinder to wet or pollute, guarantee the stability of its performance.

Drawings

The following describes the present invention in further detail with reference to the accompanying drawings.

Fig. 1 is a diagram of the filling effect of drainage sand of an automatic drainage device for a ladle in the prior art.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a cross-sectional view of fig. 2.

Fig. 4 is a schematic view of the present invention during the erection process.

Fig. 5 is a schematic view of the present invention in a vertical state.

Detailed Description

Fig. 1 is a drawing showing the filling effect of the drainage sand of an automatic ladle drainage device applied to a steelmaking system, disclosed in prior art No. CN 101543882B No. 2011.02.23, because less drainage sand is filled in the tapered space of a nozzle pocket brick at an inclined side, steel slag flows into the tapered space, and the casting rate is reduced.

The external sleeve of the automatic ladle drainage device shown in figures 2-5 can fill the space between the drainage rod and the nozzle brick cup with drainage sand, has high casting rate and simple operation, and saves labor and materials.

The external sleeve of the automatic ladle drainage device is provided with a thin-wall steel cylinder 1 for containing drainage sand, the upper end of the thin-wall steel cylinder is closed, the lower end of the thin-wall steel cylinder is of an open structure, low-temperature melting plastic 4 is adopted to seal the lower end of the thin-wall steel cylinder, two strip holes 3 are arranged on the side wall of the thin-wall steel cylinder extending out of the bottom of a ladle in parallel along the length direction, the included angle between the two strip holes is 85-95 degrees, and the low-temperature melting plastic seals the two strip holes.

Preferably, the included angle between the two elongated holes is 90 degrees.

Preferably, the length of the two elongated holes is 200-400 mm.

This automatic drainage device of ladle outside sleeve pipe is used for splendid attire drainage sand, and the intraductal drainage sand of steel just in time can evenly fill toper brick cup mouth of a river during the pouring to form the arch height, it is high to open the casting rate, and easy operation reduces the waste of drainage sand, practices thrift the cost.

Claims

1. The utility model provides a ladle automatic drainage device external sleeve pipe which characterized in that: the ladle is provided with a thin-wall steel cylinder for containing drainage sand, the upper end of the thin-wall steel cylinder is closed, the lower end of the thin-wall steel cylinder is of an open structure, low-temperature melting plastic is adopted to seal the lower end of the thin-wall steel cylinder, two strip holes are arranged on the side wall of the thin-wall steel cylinder extending out of the bottom of the ladle in parallel along the length direction, the included angle between the two strip holes is 85-95 degrees, and the low-temperature melting plastic seals the two strip holes.

2. The external sleeve of the automatic ladle drainage device according to claim 1, wherein: the included angle between the two strip holes is 90 degrees.

3. The external sleeve of the automatic ladle drainage device according to claim 1, wherein: the length of two rectangular holes is 200~400 millimeters.

4. The external sleeve of the automatic ladle drainage device according to claim 1, wherein: the outer diameter of the thin-wall steel cylinder is 1-10 mm smaller than the inner diameter of the ladle nozzle.

5. The external sleeve of the automatic ladle drainage device according to claim 1, wherein: the height of the thin-wall steel cylinder extending out of the bottom of the steel ladle is 100-700 mm.