Slab continuous casting dummy bar head

Abstract

The utility model belongs to the technical field of casting systems, and particularly discloses a slab continuous casting dummy bar head which comprises a dummy bar head body, a crystallization groove is formed in the dummy bar head body, pressing plates are connected to the two sides of the dummy bar head body through bolts, arc-shaped grooves are formed in the surfaces of the pressing plates, the dummy bar head body is fixedly connected with an installation plate, and the installation plate is fixedly connected with the crystallization groove. And the mounting plate is fixedly connected with a dummy bar chain for pulling the dummy bar head. An existing plane dummy bar head cannot be applied to a convex copper plate crystallizer, the operation and storage space needed by a dummy bar is large, the pressing plate provided with the arc-shaped groove is tightly attached to the convex face, the pressing plate cannot scratch a copper plate, and the modularized dummy bar chain is convenient to store, operate and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of casting systems, and particularly relates to a dummy bar head for slab continuous casting. Background Art

[0002] The inner cavity of the mold conventionally used in slab continuous casting machines has a flat right-angle structure. The narrow face of the slab produced by the mold with a flat right-angle inner cavity is flat, and the cross-section of the slab is a rectangular structure. When this slab is rolled into medium and heavy plates, a sideline will be formed at the position near the edge of the rolled material at the right-angle corner. This sideline usually forms a defect of heavy skin folding on the rolled material. To ensure that the rolled material has no defects, the sideline formed on the rolled material must be cut off, thus reducing the rolling成材率 (成材率 is not a recognized English word, it may be a wrong input, assuming it should be "成材率", which may be "yield rate" in English). The slab with a narrow face concave arc structure produced by a narrow face copper plate with a convex surface and a certain arc is closer to the edge when rolled into medium and heavy plates than the slab produced by the old-fashioned flat-structured mold, which can better improve the yield rate. However, the traditional dummy bar head cannot be applied to the use of a convex surface copper plate mold.

[0003] CN113102700A discloses a dummy bar head for billet continuous casting, including a dummy bar head body and a dummy bar. Both ends of the dummy bar are hook-shaped. A downward concave inner groove is provided at the top of the dummy bar head body. The inner groove is used to connect the dummy bar. The longitudinal section of the inner groove is "convex"-shaped, and the cross-section of the inner groove is "U"-shaped. The notch formed by the inner groove extends to one side of the dummy bar head body. A dummy bar hook clamping groove runs through the middle of the inner groove from top to bottom. A fixing piece is inserted into the dummy bar hook clamping groove. The fixing piece is used to cooperate with the inner groove to fix the dummy bar. The dummy bar head body can effectively and quickly fix the dummy bar, enabling personnel to complete the operation of fixing the dummy bar above the mold, shortening the time for changing casting cycles, and improving the production rhythm.

[0004] However, the adjusting gasket pressing plate at the edge of the above-mentioned structure dummy bar head is flat, which will scratch the copper plate when inserted into the lower opening of the mold. Moreover, the rigid straight structure of the dummy bar requires a large space for storage and operation in the continuous casting machine. Utility Model Content

[0005] The purpose of the present utility model is to provide a dummy bar head for slab continuous casting to solve the problems that the dummy bar head scratches the copper plate when inserted into the lower opening of the mold and the storage and operation of the dummy bar are difficult.

[0006] To achieve the above object, the basic solution provided by the present utility model is: A dummy bar head for slab continuous casting, including a dummy bar head body. A crystallization groove is provided in the dummy bar head body. Pressing plates are bolted on both sides of the dummy bar head body. An arc-shaped groove is provided on the surface of the pressing plate. An installation plate is fixedly connected to the dummy bar head body. An installation plate is fixedly connected with a dummy bar chain for pulling the dummy bar head.

[0007] The principle and beneficial effects of this utility model are as follows: By sealing the crystallizer with the ingot head, a sealing effect is achieved to prevent molten steel leakage. The molten steel flows and fills the crystallization tank in the crystallizer. When the molten steel begins to cool and solidify in the crystallizer, it gradually forms a cast billet shell with a certain shape and strength, forming a dovetail tenon that interlocks with the crystallization tank. The connection between the cast billet and the ingot head is more secure. The pressure plate with an arc-shaped groove on its surface fits the shape of the convex copper plate in the crystallizer, resulting in a better sealing effect and preventing scratches on the copper plate, thus reducing process losses.

[0008] Option 2, a preferred embodiment of the basic option, includes a chain head and several sets of chain links and connecting sections. The mounting plate has a slot, the chain head has a tenon, and the tenon engages with the slot. The chain head and mounting plate have semi-pin holes, and the chain head has a mounting plate fixedly connected to a first pin. Each chain link has a locking connector fixedly connected to both ends, and each connecting section has a second pin fixedly connected to both sides. The locking connector engages with both the first and second pins. Due to the chain link structure, the dummy chain can better absorb and buffer the impact and vibration from the casting billet during operation. The chain head, chain links, and connecting sections of the dummy chain all use locking connections, resulting in a simple structure and convenient assembly and disassembly. The slot and tenon have semi-pin holes, and the two semi-pin holes opposite each other form a pin hole. Inserting a pin into the pin hole prevents the slot and tenon from separating.

[0009] Option 3, a preferred embodiment of Option 2, involves two sets of mounting plates, each connecting a set of chain links and a connecting section. The two sets of chain structures provide traction for the ingot head, resulting in a more stable traction process, preventing billet displacement during traction, and the additional chain structure absorbs sufficient impact and vibration.

[0010] Option four, a preferred embodiment of option two, involves a connecting section at the end of the guide chain that is snapped into a chain tail for connecting to the tension leveler. The two chain structures are snapped onto the chain tail, connecting the tension leveler to the chain tail for easy assembly and disassembly.

[0011] Option 5, a preferred embodiment of Option 2, features a first step on the chain head and connecting link, and a second step on the chain link. The first and second steps engage with each other. The first step of the connecting link and the second step of the chain link cooperate to restrict the rotation direction at the engagement point, ensuring the entire chain structure can only rotate in one direction. This provides a certain rigidity and support to the traction chain, preventing the chain links from loosening from the connecting links.

[0012] Option 6, an optimal choice from the basic option, involves several adjusting shims between the ingot-drawing head body and the pressure plate. By adjusting the thickness and number of these shims, the effective sealing area of ​​the ingot-drawing head can be adjusted to adapt to the ingot-drawing operation of different crystallizers, and to ensure a tighter contact between the pressure plate and the convex copper plate, thereby improving the sealing effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a slab continuous casting ingot head according to the present invention;

[0014] Figure 2 This is a top view of a slab continuous casting ingot head according to the present invention;

[0015] Figure 3 yes Figure 2 Sectional view from point A;

[0016] Figure 4 This is a front view of a slab continuous casting ingot pressure plate according to this utility model;

[0017] Figure 5 This is a left view of a slab continuous casting ingot pressure plate according to the present invention;

[0018] Figure 6 This is a schematic diagram of the structure of a slab continuous casting chain link according to this utility model;

[0019] Figure 7 This is a structural schematic diagram of a slab continuous casting connecting joint according to the present invention;

[0020] Figure 8 This is a schematic diagram of the structure of a slab continuous casting chain head according to the present invention;

[0021] Figure 9 This is a schematic diagram of the main body of a slab continuous casting ingot head according to the present invention. Detailed Implementation

[0022] The present invention will be further described in detail below through specific embodiments:

[0023] The reference numerals in the accompanying drawings of the instruction manual include: 1-Ingot head body, 2-Crystallization tank, 3-Pressure plate, 4-Arc-shaped groove, 5-Mounting plate, 6-Ingot chain, 7-Chain link, 8-Connecting section, 9-Chain head, 10-Slot, 11-Tick, 12-Half pin hole, 13-Mounting plate, 14-First pin, 15-Second pin, 16-Mounting joint, 17-Chain tail, 18-First step, 19-Second step, 20-Adjusting shim.

[0024] Example

[0025] like Figures 1 to 9As shown: A slab continuous casting dummy bar head includes a dummy bar head body 1, a crystallization groove 2, and pressure plates 3 bolted to both sides of the dummy bar head body 1. The surface of the pressure plates 3 has an arc-shaped groove 4. Several adjusting shims 20 are provided between the pressure plates 3 and the dummy bar head. A mounting plate 5 is fixedly connected to the dummy bar head body 1. A slot 10 is provided on the mounting plate 5, and a dummy bar chain 6 for pulling the dummy bar head is engaged within the slot 10. The dummy bar chain 6 includes a chain head 9 and several sets of chain links 7 and connecting links. A tenon 11 is provided on the chain head 9, and the tenon 11 engages with the slot 10. Each of the chain head 9 and the connecting link 8 has a half pin hole 12. The two half pin holes 12 are positioned opposite each other. Two sets of clamping plates 13 are fixedly connected to the chain head 9. The clamping plate 13 has a first pin 14. The connecting link 8 has a second pin 15. The two ends of the chain link 7 have clamping heads 16. The clamping heads 16 at both ends are respectively clamped to the first pin 14 and the second pin 15. The connecting link 8 at the end of the lead chain 6 is clamped to the chain tail 17 for connecting to the straightening machine. The chain head 9 and the connecting link 8 have a first step 18. The chain link 7 has a second step 19. The first step 18 and the second step 19 are interlocked.

[0026] The implementation method of this embodiment is as follows: the dummy bar chain 6 is pushed towards the crystallizer by the straightening machine, and the dummy bar head body 1 is sent to the lower opening of the crystallizer. By increasing or decreasing the number of shims 20, the size of the dummy bar head is made to match the size of the crystallizer opening, so that the arc groove 4 of the pressure plate 3 can fit tightly with the convex copper plate of the crystallizer. After casting begins, the molten steel poured into the crystallizer is firmly connected to the crystallization groove 2 on the dummy bar head body 1. The other end of the dummy bar chain 6 is pulled down by the drive roller of the straightening machine or the support roller of the secondary cooling zone, continuously pulling the initially solidified hot billet out of the casting machine until the solidified billet enters the straightening machine. Then, the billet is pressed down by the head removal roller on the straightening machine to separate the billet from the dummy bar head body 1.

[0027] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A slab continuous casting ingot head, characterized in that, The device includes a main body (1) for drawing a crystallization groove (2), and pressure plates (3) bolted to both sides of the main body (1). The surface of the pressure plates (3) has an arc-shaped groove (4). The main body (1) is fixedly connected to an installation plate (5), and the installation plate (5) is fixedly connected to a chain (6) for drawing the main body (1).

2. The slab continuous casting ingot head according to claim 1, characterized in that... The lead chain (6) includes a chain head (9) and several sets of chain links (7) and connecting links (8). The mounting plate (5) has a slot (10). The chain head (9) has a tenon (11). The tenon (11) is engaged with the slot (10). Both the chain head (9) and the mounting plate (5) have half pin holes (12). The chain head (9) has a mounting plate (13). The mounting plate (13) is fixedly connected to a first pin (14). The two ends of the chain link (7) are fixedly connected to a connector (16). The two sides of the connecting link (8) are fixedly connected to a second pin (15). The connector (16) is engaged with the first pin (14) and the second pin (15).

3. The slab continuous casting ingot head according to claim 2, characterized in that, The mounting plate (13) is provided in two sets, and the mounting plate (13) is connected to a set of chain links (7) and connecting links (8) respectively.

4. A slab continuous casting ingot head according to claim 2, characterized in that, The connecting section (8) at the end of the derrick chain (6) is engaged with the chain tail (17) for connecting to the straightening machine.

5. A slab continuous casting ingot head according to claim 2, characterized in that, The chain head (9) and the connecting section (8) are provided with a first step (18), and the chain section (7) is provided with a second step (19). The first step (18) and the second step (19) engage with each other.

6. A slab continuous casting ingot head according to claim 1, characterized in that... Several adjusting shims (20) are provided between the main body (1) of the ingot head and the pressure plate (3).

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