CN217701270U

CN217701270U - Square billet connector

Info

Publication number: CN217701270U
Application number: CN202221247115.7U
Authority: CN
Inventors: 季必云
Original assignee: Maanshan Jiangrun Metallurgy Co ltd
Current assignee: Maanshan Jiangrun Metallurgy Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-11-01
Anticipated expiration: 2032-05-20

Abstract

The utility model discloses a square billet connector, which belongs to the technical field of molten steel smelting equipment. The square billet connecting piece of the utility model comprises an upper square frame and a lower square frame which are fixedly connected through a vertical connecting rod; and a diagonal draw frame consisting of closed diagonal draw bars is fixedly connected below the lower square frame. The tundish is arranged in a replacement gap, the square billet connector is quickly arranged at the liquid level of the square billet crystallizer, the initial pre-solidification state of molten steel in the crystallizer is fully utilized, the whole connector has certain viscosity, the whole connector can float on the surface of the molten steel, the vertical connecting rods and the diagonal ribs play a role in supporting the upper part and the lower part, and the molten steel in the tundish at the front and the rear of the square billet connector is integrated after the molten steel is solidified in the crystallizer along with the melting of the whole square billet connector in the molten steel, so that the casting flow of the square casting blank is reduced. And the problem that the head cutting ratio of a casting blank is high in the molten steel continuous casting process in the prior art is solved.

Description

Square billet connector

Technical Field

The utility model relates to a molten steel smelting equipment technical field, more specifically say, relate to a connector that molten steel square billet continuous casting was used.

Background

The advantages of the near-net-shape continuous casting billets of non-ferrous and ferrous metals in the aspects of production efficiency, yield, product quality, automation degree, energy conservation, emission reduction and the like are rapidly developed, and the continuous casting ratio becomes one of indexes for measuring the continuous casting technology level and the manufacturing capability of continuous casting equipment in various countries. The trend of heavy continuous casting light die casting of various countries is formed in a metallurgical large environment, the specific gravity of die casting research and application is small, and the design capability and system innovation are lacked. However, the continuous casting can not meet the special requirements of ultra-thick casting blanks in the fields of nuclear power, high-speed rail, military industry and the like, for example, ITER nuclear radiation shielding blocks, tokamak cooling walls, nuclear power turbine rotors, aircraft carrier deck steel, high-temperature high-pressure container steel and high-rise building shockproof thick plate steel still depend on die casting with the characteristics of large forging ratio, large single weight and small lot diversity.

The molten steel tundish is important equipment on a continuous casting production line, molten steel is poured into the crystallizer by the tundish, the molten steel on the liquid level of the crystallizer can be rapidly cooled in a replacing gap to generate the cropping of a casting blank in the replacement process of the conventional tundish, the cropping can be generated once every time the molten steel is replaced, the more cropping is, the more the waste is, in addition, the cropping and cropping occupation ratio of the casting blank can also reduce the production efficiency, and the continuous casting processing cost is improved.

Through retrieval, the Chinese patent publication No. CN 106180659A, publication No. 2016.12.07 discloses a combined water-cooled casting mold with directional solidification and zone selective cooling of a casting blank, the forced cooling and the directional solidification of the casting blank from bottom to top are realized, the over-development of a vertical mold wall and a columnar crystal growing nondirectionally is avoided, so that the vertical chassis of the casting blank grows, the problems of central shrinkage porosity and V-shaped segregation are eliminated, a large single-heavy casting blank with refined crystal grains, uniform ultrasonic detection crystal grains and compact and uniform solidification tissues without defects is obtained, and the ultrasonic flaw detection qualification rate is improved; the upper half part of the casting mould body is of a hollow heat preservation structure, the cooling water channel and the chassis of the lower half part of the casting mould body are water-cooled, different areas of the casting mould can be selectively cooled in a segmented manner, a one-dimensional temperature field and high cooling strength are established, most of sensible heat and latent heat of a casting blank are conducted from the chassis, and directional solidification is realized; the hot-feeding shrinkage head is used, and the molten glass layer, the heating agent layer and the covering layer are arranged in the hot-feeding shrinkage head, so that the shrinkage hole area is mainly concentrated on the hot-feeding shrinkage head part, the solid height in the hot-feeding shrinkage head is improved, and the proportion of cutting the head and the tail of a casting blank is reduced. This patent requires the provision of a special mold with a complex structure, a high operating threshold and a limited applicability.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to overcome the continuous casting in-process of molten steel among the prior art, the crop of square billet casting blank accounts for the higher problem, plans to provide a square billet connector, through setting up hooklike lacing wire and lacing wire frame, inserts the crystallizer fast when changing the centre package, and the molten steel in the centre package is cast into wholly in succession around making, and then reaches standard continuous casting billet size, reduces to open the technological effect of watering flow and crop.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model relates to a square billet connector, which comprises an upper frame and a lower frame which are fixedly connected through a vertical connecting rod; the lower square frame is fixedly connected with a diagonal frame consisting of closed diagonal ribs, and the fixed connection is generally fixed by welding. The tundish is arranged in the replacement gap, the billet connecting piece is quickly placed in the liquid level of the square billet crystallizer, the initial pre-solidification state of the molten steel in the crystallizer is fully utilized, the whole connecting piece can float on the surface of the molten steel, the vertical connecting rods and the diagonal ribs play a role in supporting the upper part and the lower part, and the molten steel in the tundish at the front and the rear of the square billet connecting piece is integrated after the molten steel is solidified in the crystallizer along with the melting of the whole square billet connecting piece in the molten steel, so that the end cutting of the square casting blank is reduced.

Furthermore, the baffle is fixedly connected to the bottom of the diagonal brace frame, the effect of reinforcing the diagonal brace frame is achieved, the effect of buffering the impact force of molten steel is achieved, the diagonal brace frame is preheated, and the integral consistency of the casting blank during replacement of the tundish is further improved.

Furthermore, the vertical connecting rods and the diagonal braces are in one-to-one correspondence and are fixedly connected, and are symmetrically distributed in a shape like a Chinese character 'mi' in a overlooking state, so that the integral consistency of uniform casting blanks after molten steel is solidified is ensured.

Furthermore, the lower square frame is positioned at a liquid level line of molten steel in the crystallizer, and the upper half and the lower half of the liquid level line have balanced functions of opening and closing.

Furthermore, the vertical connecting rod, the upper frame, the lower frame and the diagonal draw frame are made of steel and are the same as molten steel, so that impurities are prevented from being mixed.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) The square billet connecting piece of the utility model can be quickly placed into the liquid level of the square billet continuous casting crystallizer in the gap of the tundish replacement, the lacing wire plays a role of bearing up and down, and after the molten steel is solidified in the crystallizer along with the melting of the whole square billet connecting piece in the molten steel, the molten steel casting blanks in the tundish at the front and the back of the square billet connecting piece are integrated, thereby reducing the casting process and reducing the crop ends of the casting blanks; moreover, the structure is simple, and the installation is convenient and quick when the crystallizer is inserted;

(2) The utility model discloses a square billet connector, the setting of baffle plays when consolidating the diagonal draw frame, still plays the effect of buffering molten steel impact force to preheat the diagonal draw frame, there is better promotion effect to the holistic uniformity of casting blank when the improvement middle package is changed.

Drawings

FIG. 1 is a perspective view of a square billet connector of the present invention;

FIG. 2 is a schematic top view of the square billet connector of the present invention;

fig. 3 is a schematic view of the use state of the square billet connector of the present invention.

In the figure: 1. an upper square frame; 2. a lower square frame; 3. a vertical connecting rod; 5. a diagonal brace frame; 6. a baffle plate; 30. a crystallizer; 51. a diagonal brace; 100. a liquid level line.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Example 1

The square billet connector of the embodiment, as shown in fig. 1 and 2, comprises an upper frame 1 and a lower frame 2 which are fixedly connected through a vertical connecting rod 3; a diagonal draw frame 5 consisting of a closed diagonal draw bar 51 is fixedly connected below the lower square frame 2; the shapes of the upper frame 1 and the lower frame 2 are matched with the shape and the specification of the square billet; the vertical connecting rod 3, the upper square frame 1, the lower square frame 2 and the diagonal draw frame 5 are made of steel, round steel can be used, the supporting strength is high and is the same as that of molten steel, and impurities in the molten steel are prevented from being mixed.

In the application of the square billet connector of the embodiment, the square billet connector is inserted into the position of a liquid level line 100 of molten steel in the crystallizer 30 at the gap for replacing a tundish, the initial pre-solidification state of the molten steel in the crystallizer is fully utilized, the viscosity is certain, and the molten steel is equivalent to the liquid level of the molten steel suspended in the square billet crystallizer 30, at the moment, the vertical connecting rods 3 and the diagonal ribs 51 play a role of bearing up and down, and the molten steel casting blanks in the crystallizer 30 at the front and the rear of the square billet connector are integrated after the molten steel is solidified in the crystallizer 30 along with the melting of the whole square billet connector in the molten steel, so that the end cutting of the square casting blanks is reduced. Moreover, the whole square billet connector has a simple structure, is conveniently and quickly inserted into a crystallizer, achieves the technical effects of standardizing the size of a continuous casting billet and reducing the casting process and the end cutting.

Example 2

The basic structure of the square billet connector of the embodiment is the same as that of the embodiment 1, and the difference and the improvement are that: as shown in fig. 1 and 2, the bottom of the diagonal brace frame 5 is fixedly connected with a baffle 6, which plays a role of reinforcing the diagonal brace frame 5, also plays a role of buffering molten steel impact force, preheats the diagonal brace frame 5, and further improves the consistency of the whole casting blank when the tundish is replaced.

Example 3

The basic structure of the square billet connector of the embodiment is the same as that of the embodiment 2, and the difference and the improvement are that: as shown in fig. 2, the vertical connecting rods 3 and the diagonal braces 51 are fixedly connected in a one-to-one correspondence manner, and are symmetrically distributed in a shape like a Chinese character 'mi' in a plan view, so as to ensure the integral consistency of uniform casting blanks after molten steel is solidified.

Example 4

The basic structure of the square billet coupling piece of the embodiment is the same as that of the embodiment 3, and the difference and the improvement are that: as shown in fig. 3, the lower box 2 is located at the level line 100 of the molten steel in the mold 30, and the level line 100 is located in the upper half and the lower half, and has the effect of balancing the upper effect and the lower effect.

The application of the square billet connector of the embodiment comprises the following specific steps:

step one, tundish replacement: in the continuous casting process of the steel billet, two tundishes to be replaced before and after are assumed to be a tundish A and a tundish B, after the molten steel of the tundish A is completely poured to the crystallizer 30, a liquid level line 100 is generated in the crystallizer 30, and the tundish B is quickly prepared to be replaced:

step two, inserting the square billet connecting piece: in the gap between tundish a and tundish B, which is rapidly replaced, as shown in fig. 3, the billet coupling body is inserted at the level line 100 of the molten steel in the mold 30, the lower half of the billet coupling body below the lower box 2 being immersed below the level line 100 of the molten steel;

step three: molten steel casting: pouring the molten steel in the tundish B into the crystallizer 30 to submerge the upper half section of the square billet connector body;

step four: and (3) solidification: after the molten steel in the crystallizer 30 is solidified, the molten steel in the tundish A and the tundish B is continuously cast into a whole.

Repeating the steps, so that only one head and tail of the planned square casting blank in the whole batch can be cut after the continuous casting is finished.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the present invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solutions, but shall fall within the protection scope of the present invention.

Claims

1. A square billet coupling, characterized by: comprises an upper frame (1) and a lower frame (2) which are fixedly connected through a vertical connecting rod (3); and a diagonal draw frame (5) consisting of closed diagonal draw bars (51) is fixedly connected below the lower square frame (2).

2. The square billet coupling as set forth in claim 1, wherein: and the bottom of the diagonal brace frame (5) is fixedly connected with a baffle (6).

3. The square billet coupling according to claim 1, wherein: the vertical connecting rods (3) and the diagonal draw bars (51) are in one-to-one correspondence and are fixedly connected, and are symmetrically distributed in a shape like a Chinese character 'mi' in a overlooking state.

4. The square billet coupling as set forth in claim 1, wherein: the lower box (2) is located at the level line (100) of the molten steel in the mould (30).

5. Square billet coupling according to any of the claims 1 to 4, wherein: the vertical connecting rod (3), the upper square frame (1), the lower square frame (2) and the diagonal draw frame (5) are all made of steel.