CN218836075U

CN218836075U - Dummy bar for square and rectangular billet compatible continuous casting machine

Info

Publication number: CN218836075U
Application number: CN202223149349.0U
Authority: CN
Inventors: 陈阳; 夏秋
Original assignee: MCC Southern Continuous Casting Technology Engineering Co Ltd
Current assignee: MCC Southern Continuous Casting Technology Engineering Co Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-04-11
Anticipated expiration: 2032-11-25

Abstract

The utility model discloses a dummy bar for square and rectangular billet compatible continuous casting machine, which comprises a dummy bar body and a dummy head, wherein the dummy bar body comprises a plurality of arc units, the arc units are sequentially arranged, two adjacent arc units are connected through a first connecting piece, the head of the first arc unit is connected with the dummy head, and the front end of the dummy head is provided with a hook body; the arc unit comprises two arc side plates which are arranged in parallel, the head parts and the tail parts of the two arc side plates are connected through reinforcing plates respectively, and the middle parts of the two arc side plates are connected through a plurality of second connecting pieces which are arranged at intervals. The utility model has the advantages that: the dummy bar body is designed to be split and is formed by sequentially connecting a plurality of sections of arc-shaped units end to end, so that the overall strength of the dummy bar is improved, and the rigid dummy bar is effectively prevented from deforming due to large radius and large length.

Description

Dummy bar for square and rectangular billet compatible continuous casting machine

Technical Field

The utility model relates to a metallurgical machinery continuous casting equipment technical field, concretely relates to dummy bar of compatible conticaster of square rectangular base.

Background

Generally, a bloom (commonly called rectangular billet) and a billet (billet) are divided according to the boundary of the casting blank thickness of 220mm, and the width-thickness ratio of the bloom (bloom) and the billet (billet) is generally less than 3. The essential difference of the large square billet and the small square billet is whether casting blank bulging is considered or not, the casting blank bulging is not required to be considered for the small square billet, no clamping roller section (or short section) is arranged below the crystallizer, and a rigid dummy bar type can be adopted.

With the progress of continuous casting technology, in order to meet the market demand, save resources, reduce production cost, and simultaneously produce casting blanks with various specifications, square and round billet continuous casting machines, square and slab continuous casting machines and continuous casting machines with square and special-shaped billet compatible forms are sequentially generated; and the slab caster with the bedplate can produce slabs with wider width and slabs with narrower two flows (simultaneously solves the problem that a furnace machine is not matched when narrow slabs are produced). The appearance of square and rectangular billet continuous casting machines is closely related to the composition of rolling mills in steel works, some small and medium-sized steel works produce small-batch and various-variety products for meeting the market demands, and a compatible continuous casting machine is specially adopted to produce square and rectangular casting blanks, namely, the same casting machine can produce small square billets in a double-flow mode and rectangular billets in a single-flow mode by replacing a crystallizer and a spraying system, so that the capital construction and operation cost can be greatly reduced. The square and rectangular billet continuous casting machine has the advantages of small occupied area, low investment cost, multiple varieties and specifications, low production cost and the like, is more and more favored, and occupies a place in the market.

The casting flow guide equipment and the roller way system are shared when square billets and rectangular billets are produced, the withdrawal and straightening machine for the single-flow rectangular billets can provide driving force for double-flow square billets, namely a one-machine double-flow continuous casting machine, water gaps on two sides of a tundish must be opened simultaneously when the square billets are poured, and dummy bars of two flows are started simultaneously. The dummy bar comprises a dummy bar head and a dummy bar body, and is used as a 'movable bottom' of the crystallizer when casting, so as to block the lower opening of the crystallizer and solidify molten steel at the head of the dummy bar under the cooling effect of the crystallizer; and pulling out the casting blank from the lower opening of the crystallizer along with the dummy bar by the traction of the withdrawal and straightening machine until the casting blank is straightened by the withdrawal and straightening machine and then smoothly separated from the dummy bar head, completing the task of the dummy bar, enabling the casting machine to enter a normal withdrawal state, and transporting the dummy bar to a storage position for use in next pouring.

At present, the inner dummy bar in the industry is divided into a lower dummy bar and an upper dummy bar according to the installation mode, and is divided into a flexible dummy bar and a rigid dummy bar according to the structural form. The rigid dummy bar is a circular arc-shaped steel structural member with the same radius as that of the casting machine, so that the rigid dummy bar has the advantages of greatly simplifying a casting blank guiding device and a dummy bar tracking device of the secondary cooling section, and has the advantages of high rigidity, light weight, convenience in manufacturing, stable dummy bar and application of most small square blank casting machines with full arc R less than 11 m. The rectangular billet needs to consider the bulging of a casting blank, a longer clamping roller section is arranged below a crystallizer, a plurality of fan-shaped sections are adopted, a dummy bar is mostly of a flexible structure and generally consists of a dummy bar head, a transition section and a bar body 3, and supporting rollers are required to be arranged on the outer arc line of the existing rectangular billet continuous casting machine with a large radius (R is more than or equal to 11 m) at intervals for supporting the chain links of the dummy bar, so that once breakout is easy to bond, the online treatment is difficult.

In order to adapt to the process layout of a full-arc casting machine, the arc radius and the length of a rigid dummy bar are required to be large so as to adapt to different continuous casting machine models. However, the larger the arc radius is, the longer the dummy bar is, and the heavier the dummy bar is, the dummy bar is easy to deform to cause the whole radian to become larger, and in severe cases, the dummy bar cannot be smoothly fed into the lower opening of the crystallizer or cannot be easily recovered to a storage position, and normal production cannot be carried out, which is a main factor limiting the application of the large-radius rigid dummy bar.

Therefore, there is a need for improvements in the prior art.

Disclosure of Invention

An object of the utility model is to provide a should not warp and the good dummy bar that is used for compatible conticaster of square rectangular base of flexibility to prior art not enough.

The technical scheme of the utility model is that: a dummy bar for a square and rectangular billet compatible continuous casting machine comprises a dummy bar body and a dummy head, wherein the dummy bar body comprises a plurality of arc-shaped units, the arc-shaped units are sequentially arranged, two adjacent arc-shaped units are connected through a first connecting piece, the head of the first arc-shaped unit is connected with the dummy head, and the front end of the dummy head is provided with a hook body; the arc unit comprises two arc side plates which are arranged in parallel, the head parts and the tail parts of the two arc side plates are connected through reinforcing plates respectively, and the middle parts of the two arc side plates are connected through a plurality of second connecting pieces which are arranged at intervals.

According to the scheme, the thickness of the arc-shaped side plate is 40-80 mm.

According to the scheme, the second connecting piece is a round bar, and two ends of the round bar are fixedly connected with the inner surfaces of the two arc-shaped side plates respectively.

According to the scheme, the first connecting piece comprises a connecting plate and a pin shaft; between two adjacent arc units, be provided with the connecting plate on the reinforcing plate of back arc unit head, the front end of connecting plate inserts between two arc curb plates of preceding arc unit afterbody, links to each other through the round pin axle between two arc curb plates of connecting plate and preceding arc unit.

According to the scheme, the rear end of the dummy bar head is connected with the first arc-shaped unit of the dummy bar body through the third connecting piece.

According to the scheme, the dummy bar head is a fork-shaped square billet dummy bar head or a rectangular billet dummy bar head, and the rear end of the fork-shaped square billet dummy bar head or the rectangular billet dummy bar head is connected with the first arc-shaped unit of the dummy bar body through a third connecting piece.

According to the scheme, the third connecting piece comprises a connecting block A arranged on the first arc-shaped unit and a connecting block B arranged at the rear end of the dummy bar head, and the connecting block A and the connecting block B are connected through bolts.

According to the scheme, the dummy bar head comprises a transition section and a hook body, the rear end of the transition section is connected with the dummy bar body through a third connecting piece, and the front end of the transition section is connected with the hook body.

According to the scheme, the transition section of the Y-shaped billet dummy bar head is of a Y-shaped structure, the head parts of two front end sections of the Y-shaped billet dummy bar head are respectively connected with a hook body, and the tail parts of the two front end sections are connected with the head parts of the rear end sections; the front end section and the rear end section have the same structure and respectively comprise two parallel and opposite arc transition plates, and the two arc transition plates are connected through a connecting rod.

According to the scheme, the transition section of the dummy bar head of the rectangular billet comprises two parallel and opposite arc transition plates, and the arc transition plates are connected through a connecting rod.

The utility model has the advantages that: the utility model has the advantages that the arc radius of the dummy bar is large, the dummy bar body is long, the dummy bar body is designed to be split, and the dummy bar body is formed by sequentially connecting a plurality of sections of arc units end to end, so that the overall strength of the dummy bar is improved, and the rigid dummy bar is effectively prevented from deforming due to large radius and large length; the dummy bar body is detachably connected with the dummy bar head, so that the corresponding dummy bar head can be replaced according to actual production products, the flexibility is good, and the repeated utilization of the dummy bar body is facilitated.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is an enlarged view of fig. 1 at B.

Fig. 4 is a view from direction K of fig. 1 (the dummy bar head is a forked billet dummy bar head).

Fig. 5 is an enlarged view of fig. 4 at C.

Fig. 6 is a view along direction K of fig. 1 (the dummy bar head is a rectangular blank dummy bar head).

Wherein: 1. a dummy bar body; 1.1, arc-shaped side plates; 1.2, reinforcing plates; 1.3, connecting plates; 2. a dummy bar head; 2.1, a square billet dummy bar head; 2.2, a rectangular billet dummy bar head; 2.3, a transition section; 2.4, a hook body; 3. a bolt; 4. a round bar; 5. a pin shaft; 6. connecting a block A; 7. and (7) connecting the block B.

Detailed Description

Embodiments of the present invention will be further described with reference to the accompanying drawings, wherein the embodiments are illustrated in the drawings, and the following description is intended to be illustrative, and not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principles of the present invention are included in the scope of the appended claims, and are not described in detail in the technical solutions of the present invention.

The dummy bar for the square and rectangular billet compatible continuous casting machine is shown in figure 1, and specifically is a large-radius rigid dummy bar for the square and rectangular billet compatible continuous casting machine, and comprises a dummy bar body 1 and a dummy bar head 2, wherein the dummy bar body 1 is an arc structure with an arc radius exceeding 11m and comprises a plurality of arc units, the arc units are sequentially arranged, two adjacent arc units are connected through a first connecting piece, the head of the first arc unit is connected with the dummy bar head 2, and a hook body 2.4 is arranged at the front end of the dummy bar head 2, as shown in figure 2.

Preferably, the dummy bar body 1 is of a plate type structure, correspondingly, the arc-shaped unit comprises two arc-shaped side plates 1.1 which are arranged in parallel, the heads and the tails of the two arc-shaped side plates 1.1 are respectively connected through reinforcing plates 1.2, and the middle parts of the two arc-shaped side plates 1.1 are connected through a plurality of second connecting pieces which are arranged at intervals.

Preferably, the thickness of the arc-shaped side plate 1.1 is 40-80 mm.

In this embodiment, the second connecting member is a round bar 4, and two ends of the round bar 4 are respectively fixedly connected (welded) to the inner surfaces of the two arc-shaped side plates 1.1, so as to improve the connection strength and the working performance of the arc-shaped unit.

Preferably, the first connecting piece comprises a connecting plate 1.3 and a pin 5; between two adjacent arc units, be provided with connecting plate 1.3 on the reinforcing plate of back arc unit head, between two arc curb plates 1.1 of preceding arc unit afterbody are inserted to the front end of connecting plate 1.3, link to each other through round pin axle 5 between two arc curb plates 1.1 of connecting plate 1.3 and preceding arc unit. In this embodiment, the pin 5 is a stepped pin 5.

Preferably, the rear end of the dummy bar head 2 is connected to the first arc-shaped unit of the dummy bar body 1 through a third connecting member. The dummy bar head 2 is a fork-shaped square billet dummy bar head 2.1 or a rectangular billet dummy bar head 2.2. The rear end of the forked square billet dummy bar head 2.1 or the rectangular billet dummy bar head 2.2 is connected with the first arc-shaped unit of the dummy bar body 1 through a third connecting piece.

Preferably, as shown in fig. 2, the third connecting member includes a connecting block A6 disposed on the first arc-shaped unit, and a connecting block B7 disposed at the rear end of the dummy bar head 2, and the connecting block A6 and the connecting block B7 are connected by a bolt 3.

In this embodiment, the dummy bar head 2 includes a transition section 2.3 and a hook 2.4, the rear end of the transition section 2.3 is connected to the dummy bar body 1 through a third connecting member, and the front end of the transition section 2.3 is connected to the hook 2.4. As shown in fig. 4 and 5, the transition section 2.3 of the fork-shaped billet dummy bar head 2.1 is of a Y-shaped structure, and comprises two front end sections and two rear end sections, wherein the heads of the two front end sections are respectively connected with a hook body 2.4, and the tails of the two front end sections are connected with the heads of the rear end sections; the front end section and the rear end section have the same structure and respectively comprise two parallel and opposite arc transition plates, and the two arc transition plates are connected through a connecting rod. As shown in fig. 6, the transition section 2.3 of the rectangular blank dummy bar head 2.2 comprises two parallel and opposite arc transition plates which are connected with each other through a connecting rod.

The casting flow guide equipment and the roller way system are shared when square billets and rectangular billets are produced, and the single-flow rectangular billet withdrawal and straightening machine can provide driving force for double-flow square billets, namely, the single-machine double-flow continuous casting machine is used. When a one-machine two-flow continuous casting machine produces square billets with the thickness of less than or equal to 220mm at the same time, a forked square billet dummy bar head 2.1 is arranged at the head of a dummy bar body 1 by using a bolt 3; when the square billet is cast, the water gaps on two sides of each flow of the intermediate tank are required to be opened simultaneously, and the two flows of casting billets are pulled out from the lower opening of the crystallizer along with the dummy bar head 2 of the forked dummy bar (the hook body 2.4 on the dummy bar head 2 hooks the casting billets). When a rectangular blank with the thickness of more than or equal to 250mm is produced, a rectangular blank dummy bar head 2.2 is arranged at the head of the dummy bar body 1 by using a bolt 3; when the rectangular billet is cast, the middle water gap of each flow of the intermediate tank must be opened simultaneously, and the single-flow casting blank is pulled out from the lower opening of the crystallizer along with the dummy ingot head 2.2 of the rectangular billet.

The utility model discloses in, for reducing the deformation of rigidity dummy bar body 1, with dummy bar body 1 design for split type structure, form by a plurality of arc units end to end connection in proper order, notch cuttype's round pin axle 5 penetrates the round pin axle 5 holes of the arc curb plate 1.1 correspondence hookup location setting of arc unit, realize the connection of two arc units, this kind of structural style has improved joint strength and convenient to detach, is favorable to the reuse of dummy bar body 1, large radius rigidity dummy bar non-deformable. The front end of the dummy bar body 1 can be provided with different dummy bar heads 2 by using bolts 3, and the dummy bar heads 2 with two specifications can be flexibly and conveniently switched; the dummy bar has simple processing technology, easy manufacture, light dead weight and reasonable stress, and is particularly suitable for square and rectangular billet compatible continuous casting machines.

Those not described in detail in this specification are within the skill of the art.

It should be noted that the above is only a preferred embodiment of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that the technical solutions described in the foregoing embodiments can be modified or some technical features can be replaced with equivalents, but any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A dummy bar for a square and rectangular billet compatible continuous casting machine is characterized by comprising a dummy bar body and a dummy head, wherein the dummy bar body comprises a plurality of arc-shaped units which are sequentially arranged, two adjacent arc-shaped units are connected through a first connecting piece, the head of the first arc-shaped unit is connected with the dummy head, and the front end of the dummy head is provided with a hook body; the arc unit comprises two arc side plates which are arranged in parallel, the head parts and the tail parts of the two arc side plates are connected through reinforcing plates respectively, and the middle parts of the two arc side plates are connected through a plurality of second connecting pieces which are arranged at intervals.

2. The dummy bar for a square billet compatible continuous casting machine according to claim 1, wherein the thickness of the arc-shaped side plate is 40 to 80mm.

3. The dummy bar for a square billet compatible continuous casting machine according to claim 1, wherein the second connecting member is a round bar, and both ends of the round bar are fixedly connected to the inner surfaces of the two arc-shaped side plates, respectively.

4. The dummy bar for a square rectangular billet compatible continuous casting machine according to claim 1, wherein said first connecting member comprises a connecting plate and a pin; between two adjacent arc units, be provided with the connecting plate on the reinforcing plate of back arc unit head, the front end of connecting plate inserts between two arc curb plates of preceding arc unit afterbody, links to each other through the round pin axle between two arc curb plates of connecting plate and preceding arc unit.

5. The dummy bar for a square billet compatibility continuous casting machine according to claim 1, wherein the rear end of said dummy head is connected to the first arc unit of the dummy bar body through a third connecting member.

6. The dummy bar for a billet compatibility caster of claim 5, wherein said dummy head is a forked billet dummy head or a rectangular billet dummy head, and a rear end of the forked billet dummy head or the rectangular billet dummy head is connected to the first arc unit of the dummy bar body through the third connecting member.

7. The dummy bar for a square billet compatible continuous casting machine according to claim 5, wherein the third connecting member comprises a connecting block A provided at the first arc unit, a connecting block B provided at the rear end of the dummy head, and the connecting block A and the connecting block B are connected by a bolt.

8. The dummy bar for a square billet compatible continuous casting machine according to claim 5, wherein said dummy head comprises a transition section and a hook, a rear end of said transition section is connected to the dummy bar body by a third connecting member, and a front end of the transition section is connected to the hook.

9. The dummy bar of claim 6, wherein the transition section of the fork-shaped billet dummy head is a Y-shaped structure, and comprises two front end sections and a rear end section, the head parts of the two front end sections are respectively connected with the hook bodies, and the tail parts of the two front end sections are connected with the head parts of the rear end sections; the front end section and the rear end section have the same structure and respectively comprise two parallel and opposite arc transition plates, and the two arc transition plates are connected through a connecting rod.

10. The dummy bar of claim 6 wherein the transition section of the dummy head of the rectangular billet comprises two parallel and opposing arcuate transition plates connected by a connecting rod.