A continuous casting double-section shared high-precision centering positioning steam-water nozzle

Abstract

This invention discloses a high-precision centering and positioning steam-water nozzle for dual-section continuous casting, belonging to the field of metallurgical equipment technology. It includes a nozzle body, a connector, and a nozzle head. The nozzle body has a cuboid structure with a groove for connection to the connector, and two slots within the groove. One end of the connector is detachably equipped with the nozzle head, and the other end has a locking nut and a positioning pin. The locking nut is fixedly fitted onto the end of the connector, and the connector is threadedly connected to the groove on the nozzle body via the locking nut. Two positioning pins are symmetrically positioned on the end of the connector with the locking nut, and these pins are adapted to the slots within the nozzle body. The nozzle has a simple structure, is easy to use, reduces maintenance time when changing sections, and accurately, efficiently, and conveniently meets the installation requirements for the vertical dimension and centering accuracy of the nozzle head relative to the billet end face during production of different sections, ensuring the uniformity of secondary cooling of the continuously cast billet during actual production.

Description

Technical Field

[0001] This invention relates to a nozzle, specifically a high-precision centering and positioning steam-water nozzle for dual-section continuous casting, belonging to the field of metallurgical equipment technology. Background Technology

[0002] The quality of continuously cast billets is a key aspect of quality management in steel enterprises. High quality, high efficiency, low consumption, and safe operation are the production requirements for continuous casting machines. In the increasingly competitive steel industry, special steel production processes require ensuring both the internal and surface quality of the cast billets.

[0003] High-quality billets require uniform cooling during continuous casting. Currently, the common approach is to replace the entire spray pipe. However, this takes too long, impacting casting machine operating rate and production efficiency. Another approach is to replace the nozzles. Since different nozzle sections have varying distances from the billet and different alignment positions, and the nozzle short pipe uses a conical thread structure for fixing, it's difficult to guarantee a 90° tightening angle. Sometimes the angle exceeds 90°, sometimes it's less, making it impossible to guarantee the nozzle alignment accuracy and the vertical distance from the billet surface. If the distance and alignment accuracy between the nozzle and the billet cannot be guaranteed, uneven cooling of the billet will occur, leading to problems such as central shrinkage cavities, accelerated squareness loss, and cracks in the billet, resulting in poor billet quality.

[0004] Therefore, developing a high-precision centering and positioning steam-water nozzle for continuous casting with two cross-sections that can overcome the problems of reducing cross-section changing time and effectively ensuring the distance between the nozzle and the billet size and centering accuracy during two-section production has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a high-precision centering and positioning steam-water nozzle for dual sections of continuous casting. The nozzle has a simple structure, is easy to use, reduces maintenance time when changing sections, and accurately, efficiently and conveniently meets the installation requirements of the nozzle head distance from the end face of the billet and the centering accuracy when producing different sections, thus ensuring the uniformity of secondary cooling of the continuous casting billet in the actual production process.

[0006] To solve the above technical problems, the present invention provides a high-precision centering and positioning steam-water nozzle for dual sections of continuous casting, including a nozzle body, a connector and a nozzle head; The nozzle body has a cuboid structure, and a groove is provided inside the nozzle body for connection with the connecting piece. Two slots are provided in the groove. One end of the connector is detachably equipped with a nozzle, and the other end is equipped with a locking nut and a positioning pin. The locking nut is fixedly sleeved on the end of the connector. The connector is connected to the groove thread on the nozzle body through the locking nut. Two positioning pins are symmetrically provided on the end of the connector with the locking nut. The positioning pins are adapted to the slots in the nozzle body and are set in the slots.

[0007] Technical advantages: This invention features a slot, and the connector (also known as a short pipe) has two protruding positioning pins that mate with the slot, ensuring a 90° positioning accuracy. The tightening nut ensures the connector is locked in place, preventing water leakage and shaking, and facilitating installation and disassembly. The connector is used to connect and install with the nozzle body (also known as a nozzle seat). Based on a 220mm cross-section, the center lines of the 153mm and 220mm side arcs differ. To ensure the 153mm side arc nozzle center corresponds to the side arc center line, the connector (also known as a short pipe) ensures the 153mm side arc nozzle and the side arc center line are aligned. When producing 220mm nozzles, the nozzle body remains stationary; only the connector (also known as a short pipe) needs to be removed, and the nozzle can be directly installed onto the nozzle body for shared production. (The nozzle threads and the locking nut threads are the same; after removing the connector, the nozzle can be directly screwed onto the nozzle body.)

[0008] The technical solution further defined in this invention is: Furthermore, in the aforementioned high-precision centering and positioning steam-water nozzle shared by the dual sections of continuous casting, the nozzle body is provided with an air inlet channel and a water inlet channel. The air inlet channel and the water inlet channel are connected by a connecting groove. One end of the air inlet channel and the water inlet channel are located on the surface of the nozzle body to form an air inlet and a water inlet respectively. One end of the nozzle body is provided with a groove I, which is connected to the air inlet channel. An impact bolt is provided in the groove I. The end of the nozzle body away from the groove I is provided with a groove II, which is connected to the water inlet channel. A plug is provided in the groove II.

[0009] Technical benefits: This invention features an impact bolt for impacting and diverting secondary cooling water; a nozzle that atomizes the secondary cooling water and air, spraying it onto the surface of the hot casting at a designed angle and shape to achieve casting cooling; a nozzle body (also known as a nozzle seat) for atomizing the secondary cooling water and air; and a plug for sealing the secondary cooling water and air.

[0010] In the aforementioned high-precision centering and positioning steam and water nozzle shared by two sections of continuous casting, bolt holes that penetrate the nozzle body are evenly distributed on the nozzle body, and bolts are installed in the bolt holes to fix the nozzle body to the spray pipe.

[0011] Technical advantages: By providing bolt holes, the nozzle body can be detachably installed on the spray pipe, making installation and disassembly convenient and improving efficiency.

[0012] In the aforementioned high-precision centering and positioning steam-water nozzle shared by two sections of continuous casting, the threads of the nozzle and the threads of the locking nut are consistent.

[0013] Technical advantages: In this invention, the threads of the nozzle and the locking nut are identical, meaning that the specifications of the nozzle's external thread (thread shape, pitch, diameter, etc.) are completely matched with the specifications of the locking nut's internal thread. After removing the connector, the nozzle can be directly screwed onto the nozzle body, which can meet the needs of using dual-section nozzles and has strong adaptability.

[0014] The beneficial effects of this invention are: This invention is a high-precision centering and positioning steam-water nozzle specifically designed for use on both sides of a small billet continuous casting machine, based on the cross-sectional dimensions of the billet. This invention can achieve shared nozzles for both 153mm and 220mm billet billets. The centering accuracy of the nozzle is guaranteed by replacing the spray short connecting pipe. The 220mm billet uses a straight short connecting pipe, while the 153mm billet uses an elbow short connecting pipe (connector). To ensure 90° installation accuracy, the elbow short connecting pipe (connector) uses double locating pins for 90° precision positioning, ensuring the required centering accuracy. The connection between the connector and the nozzle body is optimized from the current conical thread connection to a loose metric thread connection (i.e., a threaded connection with a locking nut), effectively guaranteeing the vertical distance accuracy between the nozzle and the billet end face. This effectively ensures the uniformity of secondary cooling during casting, guaranteeing the internal and surface quality of the billet when producing small billets on both sides or even multiple sides. It also reduces maintenance time for changing sections, improving casting machine production efficiency and operating rate. Installation difficulty is reduced, efficiency is increased, and precision assurance performance is high.

[0015] This invention can effectively solve the problems in the production of small billet continuous casting machines with double or even multiple sections. In order to improve the production efficiency of the casting machine and ensure the uniformity of secondary cooling, and to ensure the surface and internal quality of the billet, it can achieve high precision, high efficiency and convenient control of the distance and centering accuracy between the nozzle and the end face of the billet. In other words, it provides equipment guarantee for ensuring the internal quality and accurate surface quality of the billet of high-quality special steel small billet products. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a high-precision centering and positioning steam-water nozzle shared by two sections in continuous casting, according to an embodiment of the present invention. Figure 2 The main view is 1; Figure 3 for Figure 1 Rear view; Figure 4 for Figure 3 AA cross-section view; In the diagram: 1-nozzle body, 2-connector, 3-nozzle head, 4-locking nut, 5-positioning pin, 6-air inlet channel, 7-water inlet channel, 8-connecting groove, 9-impact bolt, 10-plug, 11-bolt hole. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solutions of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments. All other embodiments obtained by those skilled in the art based on the given embodiments without innovative effort are within the scope of protection of this application. Example 1

[0018] This embodiment provides a high-precision centering and positioning steam-water nozzle for dual-section continuous casting, see reference. Figure 4 As shown, it includes a nozzle body 1, a connector 2, and a nozzle 3; For details, please refer to Figure 1 , 3 As shown in Figure 4, the nozzle body 1 has a cuboid structure. The nozzle body 1 has a groove for connecting with the connector 2. The groove has two slots. The nozzle body 1 has an air inlet channel 6 and a water inlet channel 7. The air inlet channel 6 and the water inlet channel 7 are connected by a connecting groove 8. One end of the air inlet channel 6 and the water inlet channel 7 are located on the surface of the nozzle body 1 to form an air inlet and a water inlet respectively. One end of the nozzle body 1 has a groove I, which is connected to the air inlet channel 7. The groove I has an impact bolt 9. The end of the nozzle body 1 away from the groove I has a groove II, which is connected to the water inlet channel 7. The groove II has a plug 10.

[0019] For details, please refer to Figure 1 and 4 As shown, the connector is connected to the air intake channel. The connector is a short elbow pipe. One end of the connector 2 is detachably equipped with a nozzle 3, and the other end is equipped with a locking nut 4 and a positioning pin 5. The locking nut 4 is fixedly sleeved on the end of the connector 2. The connector 2 is threadedly connected to the groove on the nozzle body 1 through the locking nut 4. Two positioning pins 5 are symmetrically provided on the end of the connector 2 where the locking nut 4 is located. The positioning pins 5 are adapted to the slots in the nozzle body 1 and are set in the slots. The threads of the nozzle 3 on the connector are the same as those of the locking nut 4. That is, the specifications of the external thread of the nozzle (thread shape, pitch, diameter and other parameters) are completely matched with the specifications of the internal thread of the locking nut. After removing the connector, the nozzle can be directly screwed onto the nozzle body, which can meet the use of dual-section nozzles and has strong adaptability.

[0020] For details, please refer to Figure 2 As shown, bolt holes 11 are evenly distributed on the nozzle body 1, and bolts are installed in the bolt holes 11 to fix the nozzle body 1 to the spray pipe. By setting the bolt holes, the nozzle body can be detachably installed on the spray pipe, which is convenient for installation and disassembly and improves efficiency.

[0021] This invention addresses the challenges of producing small square billets with dual or even multiple cross-sections. To improve casting machine efficiency, ensure uniform secondary cooling, and guarantee the surface and internal quality of the cast billet, this invention provides a high-precision, centering, and positioning steam-water nozzle for continuous casting with dual cross-sections. Using this invention, the installation requirements for the nozzle's vertical distance from the billet end face and its centering accuracy can be accurately, efficiently, and conveniently met for different cross-section production processes. This ensures uniform secondary cooling of the continuously cast billet during actual production, preventing issues such as central shrinkage cavities, increased squareness, and cracks caused by uneven cooling. In other words, it provides equipment assurance for ensuring the accurate internal and surface quality of high-quality special steel small square billet products.

[0022] In addition to the embodiments described above, the present invention may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. A high-precision centering and positioning steam-water nozzle for dual-section continuous casting, characterized in that: Includes nozzle body (1), connector (2) and nozzle (3); The nozzle body (1) is a cuboid structure. The nozzle body (1) has a groove for connecting with the connector (2). The groove has two slots. The nozzle (3) is detachably provided at one end of the connector (2), and a locking nut (4) and a positioning pin (5) are provided at the other end. The locking nut (4) is fixedly sleeved on the end of the connector (2). The connector (2) is threadedly connected to the groove on the nozzle body (1) through the locking nut (4). Two positioning pins (5) are symmetrically provided at one end of the connector (2) where the locking nut (4) is provided. The positioning pins (5) are adapted to the slots in the nozzle body (1). The positioning pins (5) are set in the slots.

2. The high-precision centering and positioning steam-water nozzle for dual-section continuous casting as described in claim 1, characterized in that: The nozzle body (1) is provided with an air intake channel (6) and a water intake channel (7). The air intake channel (6) and the water intake channel (7) are connected by a connecting groove (8). One end of the air intake channel (6) and the water intake channel (7) are located on the surface of the nozzle body (1) to form an air inlet and a water inlet respectively. One end of the nozzle body (1) is provided with a groove I. The groove I is connected to the air intake channel (7). An impact bolt (9) is provided in the groove I. The end of the nozzle body (1) away from the groove I is provided with a groove II. The groove II is connected to the water intake channel (7). A plug (10) is provided in the groove II.

3. The high-precision centering and positioning steam-water nozzle for dual-section continuous casting as described in claim 1, characterized in that: The nozzle body (1) is provided with bolt holes (11) that penetrate the nozzle body (1), and bolts are provided in the bolt holes (11) to fix the nozzle body (1) to the spray pipe.

4. The high-precision centering and positioning steam-water nozzle for dual-section continuous casting as described in claim 1, characterized in that: The threads of the nozzle (3) are the same as those of the locking nut (4).

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