Crystallizer protection device for installing dummy ingot on large round billet

Abstract

The utility model belongs to the technical field of loading dummy ingots on large round billet continuous casting machines, and relates to a crystallizer protection device for loading dummy ingots on large round billets. Comprising a device body (1), the device body (1) is of a barrel structure, a trunnion (2) is arranged on the upper portion of the device body (1), the trunnion (2) is of a structure bent outwards, the diameter of an outer wall (3) of the device body is smaller than that of an inner wall (4) of a crystallizer copper pipe, and the device body (1) is provided with an opening part (7) extending from an upper end face (5) of the device body to a lower end face (6) of the device body. The crystallizer protection device for loading the dummy ingot on the large round billet is simple in structure, can effectively protect the inner wall of the crystallizer copper pipe in the production process, prevents the dummy ingot head of the loading dummy ingot from scratching the inner wall of the crystallizer copper pipe, reliably protects the crystallizer copper pipe, prolongs the service life of the crystallizer copper pipe, and is convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of the upper-mounted dummy bar technology for a bloom continuous casting machine, and more specifically, it relates to a mold protection device for the upper-mounted dummy bar of a bloom. Background Art

[0002] The dummy bar is composed of a dummy bar head, a transition block and a bar body, and is one of the important devices for continuous casting. Before the molten steel is cast, the head of the dummy bar and part of the transition block need to be sent to the upper end of the mold to form a movable "inner bottom" of the mold. After the molten steel is cast, the molten steel that first contacts the dummy bar head and the cold material solidifies first, and together with the dummy bar head, it is continuously pulled out from the lower opening of the mold under the traction of the straightening machine. There are usually two ways to install the dummy bar, upper installation and lower installation. Currently, the upper installation is only used for slab continuous casting machines, and there is only one steel plant in China that uses the upper-mounted dummy bar method for bloom continuous casting machines. However, during the process of upper-mounted dummy bar installation, the dummy bar head enters the mold first, and it is very likely to scratch the inner wall of the mold copper tube during the process of sending the dummy bar, reducing the number of online uses of the copper tube. Seriously, it may cause damage to the entire mold copper tube, resulting in uneven heat transfer and even the risk of steel leakage. Bloom continuous casting machines basically use the lower-mounted dummy bar, and the upper-mounted dummy bar is extremely rare. Moreover, when the upper-mounted dummy bar is used, the dummy bar head will inevitably scratch the copper tube, affecting the service life of the copper tube, increasing the preparation time and the labor intensity of the operators. Therefore, there is room for improvement in the prior art.

[0003] In the prior art, there is a technology with the name of "a dummy bar upper-mounted device for a single and double-flow slab continuous casting machine" and the publication number of "CN103506587B". This technology discloses a dummy bar upper-mounted device for a single and double-flow slab continuous casting machine, including a dummy bar vehicle-mounted device, a recovery hoist device, a dummy bar device and related continuous casting devices. The dummy bar device and the recovery hoist device are both connected to the dummy bar vehicle-mounted device. The dummy bar vehicle-mounted device is connected to the continuous casting machine through related continuous casting devices. The dummy bar device is divided into a double-flow dummy bar group and a single-flow dummy bar group. Different dummy bar groups can be selected according to actual needs, and different dummy bar groups are connected to different positions of the same dummy bar vehicle. The present invention solves the problems of the collection, release and feeding of the dummy bar when the single and double-flow slab continuous casting machine realizes the upper-mounted dummy bar, and effectively shortens the tapping interval time of the continuous casting machine.

[0004] However, this technology does not involve the technical problems and technical solutions of the present application. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is: aiming at the deficiencies of the prior art, to provide a mold protection device for the upper-mounted dummy bar of a bloom, which has a simple structure, can effectively protect the inner wall of the mold copper tube during the production process, avoid the inner wall of the mold copper tube being scratched by the dummy bar head during the upper-mounted dummy bar installation, reliably protect the mold copper tube, improve the service life of the mold copper tube, and is convenient for disassembly and assembly.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present utility model is as follows:

[0007] The present utility model is a mold protection device for upper-mounted dummy bar in large round billets, including a device body. The device body is of a cylindrical structure. Trunnions are provided at the upper part of the device body, and the trunnions are structures bent outward. The diameter of the outer wall of the device body is smaller than the diameter of the inner wall of the mold copper tube. An opening part extending from the upper end face to the lower end face of the device body is provided on the device body.

[0008] A guiding ramp surface arranged along the circumference is provided between the upper end face of the device body and the inner wall of the device body.

[0009] Support structures are provided at positions near the upper part of the outer wall of the device body, and multiple support structures are arranged at intervals. The support structure includes a structural frame and multiple stay bars.

[0010] Two trunnions are symmetrically arranged or multiple trunnions are arranged at intervals.

[0011] The trunnions are located above the support structure.

[0012] The device body is made of austenitic stainless steel.

[0013] The device body of the mold protection device for upper-mounted dummy bar in large round billets is arranged to be able to be placed inside the inner wall of the mold copper tube from the upper end of the mold. When the mold protection device for upper-mounted dummy bar in large round billets is placed inside the inner wall of the mold copper tube from the upper end of the mold, the trunnions are arranged to be able to support on the upper end of the mold copper tube, and the outer wall of the device body and the inner wall of the mold copper tube are arranged to have a gap.

[0014] Adopting the technical solution of the present utility model, the working principle and beneficial effects are as follows:

[0015] The mold protection device for the upper-mounted dummy bar of a large round billet of the present utility model is provided with a device body. The device body is of a cylindrical structure. The diameter size of the inner wall of the device body needs to match the size of the upper-mounted dummy bar of the large round billet, so as to facilitate the passage of the upper-mounted dummy bar of the large round billet through the inner wall of the device body. The size of the outer wall of the device body needs to match the inner wall of the mold copper tube, so as to facilitate the sleeving of the device body inside the inner wall of the mold copper tube. An ear shaft is provided at the upper part of the device body. The ear shaft is a structure bent outward. The ear shaft can realize the support and positioning of the device body at the upper part of the mold, ensuring the reliable arrangement of the device body at the upper part of the mold copper tube. The diameter size of the outer wall of the device body is smaller than the diameter size of the inner wall of the mold copper tube, which is convenient for the device body to enter and exit the mold copper tube. The device body is provided with an opening part extending from the upper end face of the device body to the lower end face of the device body. When the device body is not subjected to external force, the opening part maintains the maximum gap, and when the device body is subjected to external force, the gap can increase or decrease. When it decreases, the two end faces of the opening part can fit, and when it increases, the distance between the two end faces increases, so that the diameter of the device body decreases or increases, effectively relieving the impact. When using the mold protection device for the upper-mounted dummy bar of the large round billet, slowly place the device body of the mold protection device for the upper-mounted dummy bar of the large round billet on the upper end of the mold copper tube, and the ear shaft at the upper end of the device body is fixedly supported at the upper part of the mold; then slowly send the dummy bar head to the lower opening of the mold through the upper-mounted dummy bar system, and a gap is maintained between the inner wall of the mold and the device body. In this way, the device body is located between the mold copper tube and the upper-mounted dummy bar of the large round billet, playing an isolation role, avoiding the direct contact between the upper-mounted dummy bar of the large round billet and the inner wall of the mold copper tube, which may cause damage to the inner wall of the mold copper tube, and reliably playing a protective role. Moreover, when the mold protection device for the upper-mounted dummy bar of the large round billet is taken out after use, it is convenient and fast, and can be reused, reducing costs. The opening part enables the diameter of the device body to change within a certain range, reducing collisions. After the upper-mounted dummy bar is completed, take out the mold protection device for the upper-mounted dummy bar of the large round billet from the inside of the mold copper tube, which does not affect the normal casting of molten steel. Brief Description of the Drawings

[0016] The following briefly describes the content expressed by each drawing in this specification and the marks in the drawings:

[0017] Figure 1 is a schematic structural diagram of the mold protection device for the upper-mounted dummy bar of the large round billet of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the mold protection device for the upper-mounted dummy bar of the large round billet of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the mold protection device for the upper-mounted dummy bar of the large round billet of the present utility model;

[0020] The labels in the attached drawings are respectively: 1. Device body; 2. Trunnion; 3. Outer wall of the device body; 4. Inner wall of the mold copper tube; 5. Upper end face of the device body; 6. Lower end face of the device body; 7. Opening; 8. Inner wall of the device body; 9. Guide ramp surface; 10. Support structure; 11. Structural framework; 12. Tie bar; 13. Mold copper tube; 14. Loading dummy bar on the large round billet. Detailed implementation mode

[0021] The following is a further detailed description of the specific implementation mode of the present utility model, such as the shapes, structures of the various components involved, the mutual positions and connection relationships between the various parts, the functions of the various parts, and the working principles, etc., with reference to the attached drawings and through the description of the embodiments:

[0022] As shown in the attached Figure 1As shown in the figure, the utility model relates to a mold protection device for the upper-mounted dummy bar of a large round billet, which includes a device body 1. The device body 1 is of a cylindrical structure. An ear shaft 2 is arranged at the upper part of the device body 1. The ear shaft 2 is a structure bent outward. The diameter of the outer wall 3 of the device body is smaller than the diameter of the inner wall 4 of the mold copper tube. An opening 7 is arranged on the device body 1 and extends from the upper end face 5 of the device body to the lower end face 6 of the device body. For the deficiencies in the prior art, the above structure proposes an improved technical solution. When setting the structure, the device body 1 is set. The device body 1 is of a cylindrical structure. The diameter of the inner wall of the device body needs to be matched with the size of the upper-mounted dummy bar of the large round billet, so that the upper-mounted dummy bar of the large round billet can pass through the inner wall of the device body. The size of the outer wall of the device body needs to be matched with the inner wall of the mold copper tube, so that the device body can be sleeved inside the inner wall of the mold copper tube. An ear shaft 2 is arranged at the upper part of the device body 1. The ear shaft 2 is a structure bent outward. The ear shaft can realize the support and positioning of the device body at the upper part of the mold, ensuring that the device body is reliably arranged on the upper part of the mold copper tube. The diameter of the outer wall 3 of the device body is smaller than the diameter of the inner wall 4 of the mold copper tube, which is convenient for the device body 1 to enter and exit the mold copper tube. An opening 7 is arranged on the device body 1 and extends from the upper end face 5 of the device body to the lower end face 6 of the device body. When the device body 1 is not subjected to external force, the opening 7 maintains the maximum gap. When the device body 1 is subjected to external force, the gap can increase or decrease. When it decreases, the two end faces of the opening can fit together. When it increases, the distance between the two end faces increases, so that the diameter of the device body decreases or increases, effectively alleviating the impact. When using the mold protection device for the upper-mounted dummy bar of the large round billet, slowly place the device body 1 of the mold protection device for the upper-mounted dummy bar of the large round billet on the upper end of the mold copper tube. The ear shaft 2 at the upper end of the device body 1 is fixedly supported on the upper part of the mold. Then, slowly send the dummy bar head to the lower opening of the mold through the upper-mounted dummy bar system. A gap is maintained between the inner wall 4 of the mold and the device body 1. In this way, the device body 1 is located between the mold copper tube and the upper-mounted dummy bar of the large round billet, playing an isolation role, avoiding the inner wall of the mold copper tube being damaged due to the direct contact between the upper-mounted dummy bar of the large round billet and the inner wall of the mold copper tube, and reliably playing a protective role. When the mold protection device for the upper-mounted dummy bar of the large round billet is used up and taken out, it is convenient and fast, and can be reused, reducing costs. The opening 7 enables the diameter of the device body to change within a certain range during use, effectively reducing collisions. After the upper-mounted dummy bar is completed, take out the mold protection device for the upper-mounted dummy bar of the large round billet from the inside of the mold copper tube, which does not affect the normal casting of molten steel. The mold protection device for the upper-mounted dummy bar of the large round billet described in the utility model has a simple structure, can effectively protect the inner wall of the mold copper tube during the production process, avoid the dummy bar head of the upper-mounted dummy bar from scratching the inner wall of the mold copper tube, reliably protect the mold copper tube, improve the service life of the mold copper tube, and is convenient for disassembly and assembly.

[0023] A guiding ramp surface 9 arranged in a circle is provided between the upper end face 5 of the device body 1 and the inner wall 8 of the device body. In the above structure, the guiding ramp surface 9 plays a reliable guiding role when the dummy bar 14 is installed on the large round billet.

[0024] Support structures 10 are provided at positions near the upper part of the outer wall 3 of the device body. A plurality of support structures 10 are arranged at intervals. The support structure 10 includes a structural frame 11 and a plurality of stay bars 12. In the above structure, the support structure 10 can reliably strengthen the local strength.

[0025] Two or a plurality of trunnions 2 are symmetrically arranged or arranged at intervals. In the above structure, the actual number of trunnions 2 is set according to the actual size of the device body, and two or more can be set.

[0026] The trunnion 2 is located above the support structure 10. In the above structure, the trunnion 2 is located above the support structure 10, and the support structure 10 strengthens the connection strength of the trunnion 2 part.

[0027] The device body 1 is made of austenitic stainless steel. The device body 1 of the mold protection device for installing the dummy bar on the large round billet is set to be a structure that can be inserted into the inner wall 4 of the mold copper tube from the upper end of the mold. When the mold protection device for installing the dummy bar on the large round billet is inserted into the inner wall 4 of the mold copper tube from the upper end of the mold, the trunnion 2 is set to be a structure that can support the upper end of the mold copper tube, and a gap is provided between the outer wall 3 of the device body and the inner wall 4 of the mold copper tube. In the above structure, the device use steps are simple, and the technical problems are effectively solved.

[0028] The crystallizer protection device for the upper-mounted dummy bar of the large round billet of the present utility model is provided with a device body 1. The device body 1 is of a cylindrical structure. The diameter dimension of the inner wall of the device body needs to match the dimension of the upper-mounted dummy bar of the large round billet, so as to facilitate the passage of the upper-mounted dummy bar of the large round billet through the inner wall of the device body. The dimension of the outer wall of the device body needs to match the inner wall of the crystallizer copper tube, so as to facilitate the sleeving of the device body inside the inner wall of the crystallizer copper tube. An ear shaft 2 is arranged at the upper part of the device body 1. The ear shaft 2 is a structure bent outward. The ear shaft can realize the support and positioning of the device body at the upper part of the crystallizer, ensuring the reliable arrangement of the device body on the upper part of the crystallizer copper tube. The diameter dimension of the outer wall 3 of the device body is smaller than the diameter dimension of the inner wall 4 of the crystallizer copper tube, which is convenient for the device body 1 to enter and exit the crystallizer copper tube. An opening 7 is arranged on the device body 1 and extends from the upper end face 5 of the device body to the lower end face 6 of the device body. When the device body 1 is not subjected to external force, the opening 7 maintains the maximum gap. When the device body 1 is subjected to external force, the gap can increase or decrease. When it decreases, the two end faces of the opening can fit together. When it increases, the distance between the two end faces increases, so that the diameter of the device body decreases or increases, effectively relieving the impact. When the crystallizer protection device for the upper-mounted dummy bar of the large round billet is used, the device body 1 of the crystallizer protection device for the upper-mounted dummy bar of the large round billet is slowly placed at the upper end of the crystallizer copper tube, and the ear shaft 2 at the upper end of the device body 1 is fixedly supported at the upper part of the crystallizer; then the dummy bar head is slowly sent to the lower opening of the crystallizer through the upper-mounted dummy bar system, and a gap is maintained between the inner wall 4 of the crystallizer and the device body 1. In this way, the device body 1 is located between the crystallizer copper tube and the upper-mounted dummy bar of the large round billet, playing an isolating role, avoiding the inner wall of the crystallizer copper tube being damaged due to the direct contact between the upper-mounted dummy bar of the large round billet and the inner wall of the crystallizer copper tube, and reliably playing a protective role. Moreover, it is convenient and fast to take out the crystallizer protection device for the upper-mounted dummy bar of the large round billet after use, and it can be reused, reducing the cost. The opening 7 enables the diameter of the device body to change within a certain range during use, effectively reducing the collision. After the upper-mounted dummy bar is completed, the crystallizer protection device for the upper-mounted dummy bar of the large round billet is taken out from the inside of the crystallizer copper tube, without affecting the normal casting of molten steel.

[0029] The present utility model has been described exemplarily above in conjunction with the drawings. Obviously, the specific implementation of the present utility model is not limited by the above-mentioned manner. As long as various improvements are made by adopting the method concept and technical solution of the present utility model, or the concept and technical solution of the present utility model are directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A mold protection device for installing an ingot guide on a large round billet, characterized in that: It includes a device body (1). The device body (1) is of a cylindrical structure. Trunnions (2) are arranged at the upper part of the device body (1). The trunnions (2) are structures bent outward. The diameter of the outer wall (3) of the device body is smaller than the diameter of the inner wall (4) of the mold copper tube. An opening (7) extending from the upper end face (5) to the lower end face (6) of the device body is provided on the device body (1).

2. The mold protection device for installing an ingot guide on a large round billet according to claim 1, wherein: A guiding ramp surface (9) arranged in a circle is provided between the upper end face (5) of the device body and the inner wall (8) of the device body in the device body (1).

3. The crystallizer protection device for mounting an ingot guide on a large round billet according to claim 1 or 2, characterized in that: Support structures (10) are arranged at positions near the upper part of the outer wall (3) of the device body. A plurality of support structures (10) are arranged at intervals.

4. The mold protection device for installing an ingot guide on a large round billet according to claim 3, characterized in that: The support structure (10) includes a structural frame (11) and a plurality of stay bars (12).

5. The mold protection device for installing the dummy bar on the large round billet according to claim 1 or 2, characterized in that: Two trunnions (2) are symmetrically arranged or a plurality of trunnions are arranged at intervals.

6. The mold protection device for installing an ingot guide on a large round billet according to claim 4, characterized in that: The trunnions (2) are located above the support structure (10).

7. The crystallizer protection device for installing an ingot guide on a large round billet according to claim 1 or 2, characterized in that: The device body (1) is made of austenitic stainless steel.

8. The mold protection device for installing an ingot guide on a large round billet according to claim 1 or 2, characterized in that: The device body (1) of the mold protection device for loading the dummy bar on the large round billet is arranged to be able to be placed into the inner part of the inner wall (4) of the mold copper tube from the upper end of the mold.

9. The mold protection device for installing an ingot guide on a large round billet according to claim 1, characterized in that: When the mold protection device for loading the dummy bar on the large round billet is placed into the inner part of the inner wall (4) of the mold copper tube from the upper end of the mold, the trunnions (2) are arranged to be able to support on the upper end of the mold copper tube, and the outer wall (3) of the device body and the inner wall (4) of the mold copper tube are arranged to have a gap.

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