Continuous casting crystallizer

Abstract

The utility model provides a continuous casting crystallizer, and relates to the field of continuous casting equipment. The continuous casting crystallizer comprises an inner pipe, an outer pipe, an outer pipe, an outer pipe and an inner pipe body, and the inner pipe body is in an annular shape and extends from one end to the other end to form the inner pipe; the water jacket is arranged outside the inner pipe in a sleeving mode, a certain interval is formed between the water jacket and the inner pipe, and a narrow water seam is formed; the water jacket is sleeved with the shell, a certain interval is formed between the shell and the water jacket, and an outer side cavity is formed; wherein the narrow water seam communicates with the outer side cavity, and a first sliding assembly and a second sliding assembly are arranged at the two ends of the inner pipe and the two ends of the shell correspondingly; the first sliding assembly and the second sliding assembly can relatively slide in the circumferential direction of the inner pipe, so that the inner pipe can rotate relative to the shell. According to the utility model, the negative slippage time can be shortened, and meanwhile, the metal demolding effect is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to continuous casting equipment field, concretely is a kind of continuous casting crystallizer. BACKGROUND

[0002] Copper rod is cylindrical material made of copper, mainly as raw material for wire and cable production, widely used in electrical, construction and machinery manufacturing industries.Copper rod production method has continuous casting and rolling method, up-drawing continuous casting method, dip coating forming method and loop rolling method, etc., wherein the continuous casting and rolling of copper rod is that refined copper liquid is flowed into ladle through runner, copper liquid is formed into casting blank by entering the crystallizer of casting machine through the nozzle of ladle and cooling crystallization, and casting blank is reduced into bright copper rod after continuous rolling and cleaning of rolling mill.The equipment of continuous casting part in the continuous casting and rolling production of copper rod mainly includes: smelting device (preheating furnace, shaft furnace, chute, holding furnace), continuous casting unit and traction equipment, and these equipment is used to continuously cast molten copper into preliminary copper rod.

[0003] Cooling water needs to be used for cooling in the continuous casting process of copper rod, and the crystallizer used in the water cooling of continuous casting process is a very important component of continuous casting machine, is a forced water-cooled bottomless mold, and is also called the "heart" of continuous casting equipment.The crystallizer is not fixedly arranged, and is usually installed on a vibrating device to make sinusoidal motion or non-sinusoidal motion up and down for facilitating metal demolding.During the vibration of the crystallizer, when the crystallizer vibrates downward, the speed thereof is slowed down relative to the pulling speed of the casting blank, so that the relative speed between the crystallizer and the casting blank is negative, and this phenomenon is called negative slip.The negative slip rate is an important index in the movement of the crystallizer, and the negative slip rate is a basic necessary condition for controlling copper leakage in continuous casting process, and the negative slip can cause periodic vibration marks on the surface of the casting blank, which is the consequence and cost of the vibrating crystallizer to ensure efficient demolding, but can affect the quality of the surface of the casting blank.In addition, if the negative slip rate is not properly controlled during the negative slip, cracks or potential crack sources can appear on the surface of the casting blank, and the probability of surface cracks and copper leakage increases.In order to efficiently demold, the vibration of the crystallizer usually needs to be set to a relatively long negative slip time in the prior art, so that larger vibration marks and surface defects are easily generated. UTILITY MODEL CONTENTS

[0004] The utility model discloses to solve the problem that the vibration of the crystallizer usually needs to be set to a relatively long negative slip time in the prior art for efficient demolding, which leads to the generation of larger vibration marks and surface defects, and provides a continuous casting crystallizer which can reduce the negative slip time while ensuring the demolding effect of metal.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A continuous casting crystallizer comprises:

[0007] an inner tube, a body of the inner tube being annular, the body extending from one end to another end to form the inner tube;

[0008] a water jacket, sleeved outside the inner tube and having a certain interval with the inner tube to form a narrow water gap; and

[0009] a shell, sleeved outside the water jacket and having a certain interval with the water jacket to form an outer chamber;

[0010] wherein the narrow water gap and the outer chamber are in communication, and the two ends of the inner tube and the shell are respectively provided with a first sliding assembly and a second sliding assembly; the first sliding assembly and the second sliding assembly can relatively slide along the circumference of the inner tube, so that the inner tube can rotate relative to the shell.

[0011] Further, the first sliding assembly includes a first annular groove at one end of the inner tube and a second annular groove at the other end of the inner tube; the second sliding assembly includes a first sliding ring on a flange at one end of the shell and a second sliding ring on a flange at the other end of the shell; the first sliding ring and the second sliding ring are respectively slidably embedded in the first annular groove and the second annular groove.

[0012] Further, a plurality of convex ribs are arranged on the outer side of the side wall of the inner tube in the circumferential direction, and the convex ribs extend along the axial direction of the inner tube.

[0013] Further, a plurality of strip-shaped grooves are arranged on the inner side of the side wall of the water jacket in the circumferential direction, and the strip-shaped grooves extend along the axial direction of the water jacket; the strip-shaped grooves are in alignment with the top of the convex ribs, and can limit the rotation angle of the inner tube relative to the shell.

[0014] Further, the axial cross section of the strip-shaped groove is arc-shaped, and the central angle of the arc-shaped axial cross section is 3°-10°.

[0015] Further, an outer flange is arranged on the outer side of the side wall of the water jacket, and the outer flange separates the outer chamber into a water inlet chamber and a water outlet chamber.

[0016] Further, the water inlet chamber is arranged below the outer flange, and the shell is provided with a water inlet communicating with the water inlet chamber; the water outlet chamber is arranged above the outer flange, and the shell is provided with a water outlet communicating with the water outlet chamber.

[0017] Further, an inner flange is arranged on the inner side of the side wall of the shell; the inner flange abuts against the outer flange.

[0018] Furthermore, the inner flange and the outer flange are respectively provided with a third annular groove and a fourth annular groove corresponding to each other; a sealing ring is embedded between the third annular groove and the fourth annular groove.

[0019] Furthermore, a convex ring is provided in the fourth annular groove, and the convex ring can apply pressure to the sealing ring to deform it.

[0020] The beneficial effects of the utility model are:

[0021] 1. The utility model is provided with an inner tube, a water jacket and a shell that are sequentially sleeved from the inside to the outside. The water jacket and the shell are fixedly arranged to form a connected narrow water gap and an outer chamber. The first sliding components at both ends of the inner tube are used to cooperate with the second sliding components at both ends of the shell for sliding connection, so that the shell and the inner tube can rotate relative to each other. The rotation tendency is used to bring about an auxiliary demoulding force in the horizontal direction, thereby enhancing the demoulding effect of the crystallizer, thereby solving the problem in the prior art that in order to achieve efficient demoulding, the vibration of the crystallizer usually needs to set a long negative slip time, which leads to the easy occurrence of large vibration marks and surface defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 A three-dimensional schematic diagram of a crystallizer according to an embodiment of the present invention;

[0024] Figure 2 A top view of a crystallizer according to an embodiment of the present invention;

[0025] Figure 3 for Figure 2 Side cross-section of the middle BB;

[0026] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0027] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0028] Figure 6 for Figure 3 Enlarged view of point D in the middle;

[0029] Figure 7 An exploded view of a crystallizer according to an embodiment of the present invention;

[0030] Figure 8 is a top view of the inner tube of the embodiment of the utility model;

[0031] Figure 9 is a three-dimensional schematic view of the water jacket of the embodiment of the utility model.

[0032] Reference signs: 100-inner tube, 102-narrow water gap, 110-convex rib, 112-top angle, 120-first annular groove, 130-second annular groove;

[0033] 200-water jacket, 203-water inlet chamber, 204-water outlet chamber, 210-strip-shaped groove, 220-outer flange, 222-fourth annular groove, 223-convex ring, 230-stiffener;

[0034] 300-housing, 320-inner flange, 322-third annular groove, 330-water inlet, 340-water outlet, 350-first flange, 352-first sliding ring, 360-second flange, 362-second sliding ring;

[0035] 400-connection plate. DETAILED DESCRIPTION

[0036] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0037] The following disclosure provides many different embodiments or examples for implementing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model.

[0038] The embodiments of the utility model will be described in detail below with reference to the drawings.

[0039] Embodiment 1

[0040] The copper rod continuous casting crystallizer needs to be installed on a vibration device to work. The existing copper rod continuous casting crystallizer is usually divided into two types: sinusoidal vibration mode and non-sinusoidal vibration mode. The vibration device of the sinusoidal vibration mode has simple requirements and low investment, but the negative slip time is long and it is easy to produce large vibration marks. Although the vibration device of the non-sinusoidal vibration mode can reduce the generation of vibration marks, the setting requirements are complex and the investment is high.

[0041] In order to solve the problem that the sinusoidal vibration mode vibration device in the prior art requires a long negative slip time to ensure the demoulding effect, this embodiment provides a continuous casting crystallizer for water-cooling forced cooling ingot molding in the continuous casting production of copper rods. The continuous casting crystallizer can reduce the negative slip time while ensuring the metal demoulding effect. Figures 1-9 The continuous casting crystallizer mainly includes: an inner tube 100, a water jacket 200 and a shell 300, which are sequentially arranged from the inside to the outside.

[0042] The inner tube 100 is the part in direct contact with the molten metal inside the crystallizer, and is used to transfer heat between the molten metal and the coolant, so that the molten metal can be quickly cooled and shaped. Therefore, in the continuous casting crystallizer of copper rods, the inner tube 100 is usually made of graphite material. Figure 7 、 Figure 8 As shown in FIG, the inner tube 100 of this embodiment extends from one end to the other, with a main body having a generally circular cross-section, resulting in an overall cylindrical shape. Furthermore, a plurality of ribs 110 are evenly arranged along the circumference of the outer sidewall of the inner tube 100. These ribs 110 extend axially from one end of the inner tube 100 to the other. The cross-section of the ribs 110 is generally triangular, with two corners connected to the outer sidewall of the inner tube 100 and a top corner 112 extending radially outward from the inner tube 100. The multiple ribs 110 increase the contact area between the outer sidewall of the inner tube 100 and the coolant, thereby enhancing the cooling effect. Furthermore, a first annular groove 120 and a second annular groove 130 are respectively provided on each end surface of the inner tube 100. The first and second annular grooves 120 and 130 are used to couple the ends of the inner tube 100 to the ends of the housing 300.

[0043] The water jacket 200 is a part between the inner tube 100 and the shell 300, and is used to form the narrow water gap 102 together with the inner tube 100. The design of this part is very important to maintain the shape and size of the crystallizer. Since the water flows at high speed in the narrow water gap 102, the water pressure is small to the inner cavity pressure of the water jacket 200, while on the outside of the crystallizer, the outer wall of the lower part of the water jacket is subjected to a larger water inlet pressure, so that the water jacket 200 is compressed, making it difficult to deform, thereby keeping the core structure of the middle part of the crystallizer stable. The water jacket 200 of the present embodiment also extends from one end to the other end, and the cross section of the body is generally annular, and the overall shape of the water jacket 200 is generally cylindrical. At the same time, an outer flange 220 is provided on the outer side of the side wall of the water jacket 200, and the outer flange 220 is used to separate the cavity between the outer surface of the side wall of the water jacket 200 and the inner surface of the side wall of the shell 300 into two parts, forming the lower water inlet chamber 203 and the upper water outlet chamber 204. On the other hand, the outer flange 220 is also used to fix the relative position of the water jacket 200 and the shell 300. Furthermore, two symmetrical reinforcing ribs 230 are provided between the upper part of the outer flange 220 and the outer side of the side wall of the water jacket 200, and the reinforcing ribs 230 are generally triangular plates, which are used to keep the structure of the water jacket 200 stable.

[0044] The shell 300 is the outer structure of the crystallizer, and has the functions of inputting and outputting cooling liquid, connecting external vibration devices and continuous casting roller, etc. As shown in Figure 1 、 Figure 3As shown in FIG, the housing 300 of this embodiment extends from one end to the other, with its main portion having a roughly circular cross-section, resulting in a generally cylindrical shape. An inner flange 320 is provided in the middle of the inner side surface of the sidewall of the housing 300. When the water jacket 200 is installed within the housing 300, the upper surface of the inner flange 320 abuts against the lower surface of the outer flange 220. The first and second flanges 350, 360 at each end of the housing 300 secure the relative positions of the water jacket 200 and the housing 300. Furthermore, a water inlet 330 and a water outlet 340 are provided on the sidewall of the housing 300. Among them, the water inlet 330 is arranged at the lower part of the side wall of the shell 300, connected to the water inlet chamber 203 below, for inputting coolant; the water outlet 340 is arranged at the upper part of the side wall of the shell 300, connected to the water outlet chamber 204 above, for outputting coolant. The cooling water in the crystallizer adopts a bottom-in and top-out flow mode, which is conducive to exhausting air, and the metal in the crystallizer is gradually cooled and crystallized from top to bottom, and the temperature gradually decreases. The water temperature near the upper high-temperature liquid phase zone is higher. The bottom-in and top-out flow mode is conducive to the timely discharge of high-temperature coolant, thereby controlling the water temperature and improving the cooling efficiency. In addition, a first flange 350 and a second flange 360 ​​are mounted at both ends of the housing 300. The diameters of the center holes of the first flange 350 and the second flange 360 ​​match the inner diameter of the inner tube 100, thereby limiting the relative axial positions of the inner tube 100 and the housing 300. A first sliding ring 352 and a second sliding ring 362 are respectively provided on the lower surfaces of the first flange 350 and the second flange 360. The first sliding ring 352 and the second sliding ring 362 are respectively engaged with the first annular groove 120 and the second annular groove 130, and the contact surfaces can slide relative to each other. Thus, while maintaining a stable axial relative position of the inner tube 100 relative to the housing 300, the inner tube 100 can also rotate relative to the housing 300. During the continuous casting process, the instability caused by the vibration device causes the inner tube 100 to rotate, thereby generating a force between the inner tube 100 and the metal in the horizontal direction to assist in demolding, thereby enhancing the demolding effect of the crystallizer without changing the negative slip rate.

[0045] A specific working method of this embodiment is:

[0046] The copper melt is poured into the continuous casting machine to start working; when the copper melt flows through the crystallizer, the cooling liquid is introduced into the crystallizer from the water inlet 330 of the shell 300, and the cooling liquid first enters the lower water inlet chamber 203; then the cooling liquid enters the lower end of the narrow water gap 102 from the water inlet chamber 203, exchanges heat with the melt through the inner tube 100 to cool and cool, so that the melt is gradually crystallized and formed from top to bottom in the inner tube 100; then the cooling liquid enters the water outlet chamber 204 from the upper end of the narrow water gap 102, and is discharged from the water outlet 340 of the shell 300; at the same time, during the entire crystallization process, the crystallizer is driven up and down by the connecting vibration device, and the up and down driving process causes the instability of the crystallizer, causing the rotation tendency of the inner tube 100, thereby generating an auxiliary demolding force between the inner tube 100 and the metal in the horizontal direction, and enhancing the demolding effect of the crystallizer without changing the negative slide ratio.

[0047] In summary, in the present embodiment, the continuous casting crystallizer is provided with the inner tube 100, the water jacket 200 and the shell 300 which are sequentially sleeved from inside to outside, the water jacket 200 and the shell 300 are fixedly arranged to form the narrow water gap 102 and the outer chamber which are communicated, the first annular groove 120 and the second annular groove 130 at both ends of the inner tube 100 are slidably connected with the first sliding ring 352 and the second sliding ring 362 at both ends of the shell 300, so that the shell 300 and the inner tube 100 can rotate relative to each other, the horizontal auxiliary demolding force is generated by the rotation tendency, the demolding effect of the crystallizer is enhanced, and the problem that the vibration of the crystallizer usually needs to be set for a long negative slide time to achieve efficient demolding, which leads to the problem of easy occurrence of large vibration marks and surface defects is solved.

[0048] In the present embodiment, the connecting plate 400 is also sleeved on the outer side of the side wall of the shell 300, the connecting plate 400 is substantially rectangular, and both ends thereof extend to both sides of the shell 300 for connecting the shell 300 and the vibration device; at the same time, the lower part of the connecting plate 400 is used for connecting the shell 300 and the guide roller of the copper rod; and the pipeline of the water outlet 340 of the shell 300 is embedded and passes through the connecting plate 400 to make the pipeline structure of the crystallizer stable.

[0049] As Figure 9As shown, in the embodiment, a plurality of strip-shaped grooves 210 are uniformly arranged on the inner side of the side wall of the water jacket 200, and extend along the axial direction of the water jacket 200 from one end to the other end of the water jacket 200. The axial cross section of the strip-shaped groove 210 is substantially arc-shaped, and the bottom surface of the strip-shaped groove 210 is arc-shaped. When the inner tube 100 is installed, the arc surface at the bottom of the strip-shaped groove 210 is aligned with the top corner 112 of the convex rib 110 but does not contact the top corner 112, so as to limit the movement range of the top corner 112, thereby limiting the rotation angle of the inner tube 100 relative to the shell 300. Therefore, the water jacket 200 can limit the inner tube 100 to rotate only within a small angle relative to the water jacket 200 and the shell 300, thereby avoiding that the inner tube 100 rotates too much during the up-and-down vibration of the entire crystallizer, causing the torsional deformation of the casting, and avoiding the generation of new surface defects and internal stress. Preferably, in the embodiment, the central angle of the arc-shaped cross section of the strip-shaped groove 210 is 5°, and in one or more other embodiments, the central angle of the arc-shaped cross section of the strip-shaped groove 210 can also be set to 3°-10°.

[0050] In addition, as Figure 5 shown, in the embodiment, a third annular groove 322 is arranged at the connection between the upper surface of the inner flange 320 and the inner side of the side wall of the shell 300, and a fourth annular groove 222 is arranged at the outer edge of the lower surface of the outer flange 220, and the third annular groove 322 and the fourth annular groove 222 are located opposite to each other and are used for jointly embedding an annular sealing ring (not shown in the figure), so as to prevent the cooling liquid from leaking between the lower water inlet chamber 203 and the upper water outlet chamber 204. At the same time, a convex ring 223 protruding downward is arranged in the fourth annular groove 222, and the convex ring 223 extends in a ring along the circumferential direction of the fourth annular groove 222. The convex ring 223 can press the lower sealing ring to deform the sealing ring and increase the radial dimension of the sealing ring, so as to abut against the inner walls of the third annular groove 322 and the fourth annular groove 222 on both sides, thereby enhancing the sealing effect.

[0051] In one or more other embodiments, different sliding assemblies can also be arranged at the two ends of the inner tube 100 and the two ends of the shell 300 to replace the first sliding ring 352 and the first annular groove 120, and the second sliding ring 362 and the second annular groove 130, as long as the first sliding assembly and the second sliding assembly between the two ends of the inner tube 100 and the two ends of the shell 300 can relatively slide in the circumferential direction, for example, two annular grooves are arranged on the flanges at the two ends of the shell 300, and two sliding rings are arranged at the two ends of the inner tube 100; or two annular sliding blocks are arranged on the flanges at the two ends of the shell 300, and annular sliding seats are arranged at the two ends of the inner tube 100, and the like.

[0052] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A continuous casting mold, characterized in that: Include: An inner tube (100), wherein the inner tube body is annular, and the inner tube body extends from one end to the other end to form the inner tube (100); a water jacket (200) which is sleeved outside the inner tube (100) and has a certain distance between the inner tube (100) and the water jacket (200) to form a narrow water gap (102); and A housing (300) is sleeved outside the water jacket (200) and has a certain distance between the housing and the water jacket (200) to form an outer chamber; The narrow water gap (102) is in communication with the outer chamber, and a first sliding assembly and a second sliding assembly are respectively provided at both ends of the inner tube (100) and the shell (300); the first sliding assembly and the second sliding assembly can both slide relative to each other along the circumference of the inner tube (100), so that the inner tube (100) can rotate relative to the shell (300).

2. The continuous casting mold according to claim 1, characterized in that The first sliding assembly comprises a first annular groove (120) at one end of the inner tube (100) and a second annular groove (130) at the other end; the second sliding assembly comprises a first sliding ring (352) on a flange at one end of the housing (300) and a second sliding ring (362) on a flange at the other end; the first sliding ring (352) and the second sliding ring (362) are respectively slidably embedded in the first annular groove (120) and the second annular groove (130).

3. The continuous casting mold according to claim 1, characterized in that: A plurality of convex ribs (110) are provided on the outer surface of the side wall of the inner tube (100) in a circumferential direction, and the convex ribs (110) extend along the axial direction of the inner tube (100).

4. The continuous casting mold according to claim 3, characterized in that: A plurality of strip grooves (210) are circumferentially provided on the inner side surface of the side wall of the water jacket (200), and the strip grooves (210) extend along the axial direction of the water jacket (200); the strip grooves (210) are aligned with the top of the convex rib (110), and can limit the rotation angle of the inner tube (100) relative to the shell (300).

5. The continuous casting mold according to claim 4, characterized in that: The axial cross-section of the strip-shaped groove (210) is arc-shaped, and the central angle of the arc-shaped axial cross-section is 3° to 10°.

6. The continuous casting mold according to claim 1, characterized in that: An outer flange (220) is provided on the outer side surface of the side wall of the water jacket (200), and the outer flange (220) divides the outer chamber into a water inlet chamber (203) and a water outlet chamber (204).

7. The continuous casting mold according to claim 6, characterized in that: The water inlet chamber (203) is arranged below the outer flange (220), and a water inlet (330) communicating with the water inlet chamber (203) is provided on the housing (300); the water outlet chamber (204) is arranged above the outer flange (220), and a water outlet (340) communicating with the water outlet chamber (204) is provided on the housing (300).

8. The continuous casting mold according to claim 6, characterized in that: An inner flange (320) is provided on the inner side surface of the side wall of the shell (300); the inner flange (320) is in contact with the outer flange (220).

9. The continuous casting mold according to claim 8, characterized in that: A third annular groove (322) and a fourth annular groove (222) corresponding to each other are respectively provided on the inner flange (320) and the outer flange (220); a sealing ring is embedded between the third annular groove (322) and the fourth annular groove (222).

10. The continuous casting mold according to claim 9, characterized in that: A convex ring (223) is provided in the fourth annular groove (222), and the convex ring (223) can apply pressure to the sealing ring to deform it.

Images