Crystallizer copper pipe die capable of adjusting taper of inner cavity on line

Abstract

The utility model provides a crystallizer copper pipe die capable of adjusting the taper of an inner cavity on line, which relates to the technical field of crystallizers and comprises a tubular main body, at least one wall of the tubular main body is provided with a longitudinal groove, and the opening direction of the longitudinal groove is the outer surface of the tubular main body. The longitudinal groove is the same as the casting channel of the tubular main body in direction and is formed in the feeding end; the expansion pipe is arranged in the longitudinal groove, at least one end of the expansion pipe is provided with a combination connector, and the combination connector is detachably connected with a pressurizing pipeline. And variable field working conditions cannot be adapted. The technical problems of poor attachment degree of a casting blank and the inner wall of a crystallizer copper pipe mold, poor outward heat transfer of the casting blank, deterioration of the quality of a casting product, even cracking of the casting blank and leakage of a casting medium in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The utility model mainly relates to crystallizer technical field, concretely relates to a kind of crystallizer copper pipe mould of online adjustment inner cavity taper. BACKGROUND

[0002] As the core component of continuous casting or semi-continuous casting, different types of crystallizer copper mould are well known, and its main body is a tubular structure. The inner cavity of the tubular structure is a channel for casting, which can promote the formation of cast billets from liquid metal and can adapt to different shape requirements, such as circular, square, rectangular and polygonal, etc. The outer surface of the tubular structure is usually formed with one or more channels along the longitudinal direction, which are part of a closed cooling cycle, and the cooling medium is water.

[0003] Patent 200480010049.X describes a structure of crystallizer for continuous casting, which includes a copper pipe forming a cavity and a device for cooling the copper pipe by water circulation cooling, characterized in that the copper pipe is provided with a support shell on the entire circumference and substantially the entire length, which supports the copper pipe at the outer side on a support surface, and the cooling liquid channels for guiding the cooling water are distributed on the entire circumference and substantially arranged on the entire ingot length in the copper pipe or the support shell.

[0004] The ingot mould for continuous casting of steel in the form of a polygonal, preferably rectangular cross-section, blank and bloom, which includes a copper pipe forming a cavity and a device for cooling the copper pipe by water circulation cooling, characterized in that the copper pipe is provided with a support plate connected to the copper pipe and supporting the copper pipe wall at the support surface substantially on the entire circumference and substantially on the entire length at the outer side of the pipe, and the cooling liquid channels for guiding the cooling water are distributed on the entire circumference and substantially arranged on the entire ingot length in the copper pipe or the support plate.

[0005] The function of the support plate is to maintain the distance between the cooling device and the copper pipe, and the connecting plate is inserted into the attachment base made on the cooling device, which defines a fixed joint type mechanical connection, so that the copper pipe can be detached from the external cooling device.

[0006] Patent CN 105473253 A describes another form of crystallizer copper pipe mould for continuous casting, which includes a tubular body having at least one wall defining a longitudinal casting cavity and a plurality of longitudinal grooves formed on at least a portion of the at least one wall and opening to the outside of the at least one wall, characterized in that a covering adhesive comprising one or more layers of fibrous material is immovably wrapped on the outer surface of the at least one wall.

[0007] The longitudinal recesses are closed by a metal layer made with electrolytic deposition techniques, said metal layer defining a plurality of corresponding cooling liquid channels configured to flow a cooling fluid therein, characterized in that said covering adhesive is wrapped around said metal layer and is in direct contact with said metal layer, so that the whole consisting of said at least one wall and said metal layer becomes more resistant.

[0008] Patent 200480010049.X although the support plate is mechanically connected to the copper pipe and the external cooling device, but this connection is not tight, and is affected by the manufacturing tolerance of the copper pipe and the external cooling device, so the overall rigidity is poor, and the copper pipe is easy to deform, and the deformation direction is not controlled.

[0009] Patent CN 105473253A although the inner and outer tubular bodies are connected by high-strength electrodeposition, the overall strength is improved, and there is no deformation or little deformation during use, but the taper of the inner tubular body cannot be changed after the processing and manufacturing are completed.

[0010] The taper of the known conventional crystallizer copper pipe mold does not match the site, which causes a series of casting defects. In one case, the crystallizer strength is not high, the thermal stress caused by the contact temperature between the liquid steel and the inner wall of the crystallizer copper pipe mold mainly exists inward bulging in the meniscus region, which reduces the taper between the meniscus region and the upper inlet portion, and makes the lower section of the crystallizer copper pipe mold always have a larger taper than the specified taper relative to the meniscus region, which is a passive deformation of the crystallizer copper pipe. In another case, the strength of the crystallizer copper pipe mold is enhanced by the external cooling device to prevent the copper pipe from deforming. In the above two cases, the taper of the inner cavity of the crystallizer copper pipe mold cannot be actively changed. When the carbon content of the steel grade or the drawing speed and other site process conditions change, the taper of the crystallizer copper pipe mold that has been made cannot be adjusted to adapt to the changing site working conditions. This causes the casting blank to be poorly fitted to the inner wall of the crystallizer copper pipe mold, the heat transfer of the casting blank to the outside to be poor, and the casting product quality to deteriorate, and even the casting blank to break, causing the casting medium to leak.

[0011] It should be noted that the above content belongs to the technical cognition range of the utility model person, and since the technical content in the art is vast and complex, the above content of the present application does not necessarily constitute the prior art. Utility model content

[0012] 1. Technical problem to be solved by the utility model:

[0013] The utility model provides a crystallizer copper pipe mold capable of adjusting the taper of the inner cavity on line, so as to solve the technical problems in the background art.

[0014] 2. Technical scheme:

[0015] To achieve the above object, the utility model provides a technical scheme for a crystallizer copper pipe mould capable of adjusting the inner cavity taper on line, comprising

[0016] The tubular body is provided with a longitudinal groove on at least one wall thereof, the opening direction of the longitudinal groove is the outer surface of the tubular body, and the longitudinal groove is arranged at the feeding end and has the same casting channel direction as the tubular body.

[0017] The expansion pipe is arranged inside the longitudinal groove, and at least one end of the expansion pipe is provided with a connecting joint which is detachably connected with a pressurizing pipeline.

[0018] When the device is used, the liquid metal enters from the top of the tubular body and flows out from the bottom, and the heat of the liquid metal is quickly conducted out of the tubular body. When the metal changes from liquid to solid, the temperature of the metal decreases, and at the same time, the metal shrinks. Different pulling speeds are suitable for different metal shrinkage rates in the conventional crystallizer. If the metal shrinkage rate exceeds the suitable range, the quality of the discharged steel will decrease. Therefore, the conventional operation mode needs to replace the suitable crystallizer. This mode is easy to delay the manufacturing period and has a large manufacturing cost. When the device is used to crystallize materials with a small shrinkage rate, the crystallization operation can be normally carried out. When the shrinkage rate is large, the shrinkage of the metal changes from liquid to solid, which will affect the product quality. Therefore, the material in the expansion pipe is transported by the pressurizing pipeline, so that the expansion pipe expands in the longitudinal groove, the longitudinal groove of the tubular body becomes wider, the opening size of the feeding end of the tubular body becomes larger, the size of the discharging end of the tubular body remains unchanged, the taper of the casting channel becomes larger, the inner cavity taper of the tubular body is tightly combined with the casting metal with a high shrinkage rate, and the purpose of good cooling is achieved.

[0019] Further, the tubular body is made of high-thermal-conductivity materials, including but not limited to one or more of TP2, Tag0.1P, CuZrCr or CuNiBe.

[0020] Further, the tubular body is provided with cooling liquid channels on four sides, and the cooling liquid channels are respectively provided with cooling liquid inlets and outlets at two ends.

[0021] Further, the outer wall of the tubular body is directly connected with the cooling liquid channels.

[0022] Further, the longitudinal grooves are annularly arranged on four side walls of the tubular body, and two longitudinal grooves are symmetrically arranged on each side wall.

[0023] Further, the longitudinal grooves have a circular, square, triangular or polygonal shape.

[0024] Further, the length of the longitudinal groove is less than the length of the tubular body.

[0025] Further, the longitudinal groove is provided with a plurality of expansion tubes, and the expansion tubes are detachably connected to the pressurizing pipeline through the connecting joints.

[0026] Further, the expansion tube is made of high-temperature-resistant rubber tube and has good ductility.

[0027] Further, the distance between the bottom of the longitudinal groove and the inner wall of the casting channel is 3-15 mm, and the width of the longitudinal groove is 3-40 mm.

[0028] 3. Beneficial effects:

[0029] Compared with the prior art, the technical scheme has the following beneficial effects:

[0030] The utility model discloses a reasonable design, through setting up longitudinal groove cooperation expansion tube on the outer wall of tubular body, can carry out the taper of the inlet end of tubular body on -line adjustment to different shrinkage rate's carbon steel, and then improve the adaptation ability of tubular body, improve the fitting degree of crystallizer copper pipe mould inner wall and casting blank, to guarantee the casting blank quality after the crystallizer copper pipe mould, and the utility model discloses the design is reasonable, through setting up longitudinal groove cooperation expansion tube on the outer wall of tubular body, can carry out the taper of the inlet end of tubular body on -line adjustment to different shrinkage rate's carbon steel, and then improve the adaptation ability of tubular body, improve the fitting degree of crystallizer copper pipe mould inner wall and casting blank, to guarantee the casting blank quality after the crystallizer copper pipe mould,

[0031] And the device is simple in structure, and has no taboo during installation, and will not affect the use of electromagnetic stirring and liquid level detection, and is high in adaptation ability, can save a large amount of mould cost, and can improve the crystallization efficiency since different specifications of crystallizers do not need to be frequently replaced.

[0032] It should be noted that the structures not introduced in the utility model are the same as the prior art or can be realized by using the prior art since they do not involve the design points and improvement direction of the utility model, and details are not repeated here. DRAWINGS

[0033] Figure 1 is a structural schematic view of the utility model;

[0034] Figure 2 is a structural schematic view of the side of the utility model;

[0035] Figure 3 is a structural schematic view of the top section of the utility model;

[0036] Figure 4 is a structural schematic view of the side section of the utility model;

[0037] Figure 5 is a structural schematic view of the side section of the utility model at another depth.

[0038] REFERENCE SIGNS:

[0039] 1 - tubular body; 2 - casting channel; 3 - outer surface of the copper mold wall; 4 - cooling liquid channel; 5 - longitudinal groove; 6 - expansion tube; 7 - coupling joint; 8 - cooling liquid inlet; 9 - cooling liquid outlet; 10 - sealing plug. DETAILED DESCRIPTION

[0040] In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the relevant drawings, which show several embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0041] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise" are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0043] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing", "provided with", "provided in" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] It should be noted that the structures not introduced in the present application are not related to the design points and improvement direction of the present application, and can adopt the existing technology known to those skilled in the art.

[0045] The specific implementation of the present application will be described in detail below in combination with specific embodiments.

[0046] Referring to the drawings Figures 1-4 A crystallizer copper pipe mold with adjustable inner cavity taper, comprising

[0047] A tubular body 1, at least one wall of the tubular body 1 is provided with a longitudinal groove 5, the opening direction of the longitudinal groove 5 is the outer surface of the tubular body 1, the longitudinal groove 5 is in the same direction as the casting channel 2 of the tubular body 1 and is arranged at the inlet end;

[0048] An expansion pipe 6, the expansion pipe 6 is arranged inside the longitudinal groove 5, at least one end of the expansion pipe 6 is provided with a connecting joint 7, and the connecting joint 7 is detachably connected with a pressurizing pipe.

[0049] When the device is used, liquid metal enters from the top of the tubular body 1 and flows out from the bottom, the heat of the liquid metal is quickly conducted out of the tubular body 1, and the metal that changes from liquid to solid will shrink at the same time of temperature reduction, and the shrinkage rate is different, the metal shrinkage rate that the conventional crystallizer can adapt to is in a certain range, if the metal shrinkage rate exceeds the range that the crystallizer can adapt to, the quality of the discharged steel will be reduced, therefore, the conventional operation mode needs to replace the crystallizer that can adapt to it, this mode is easy to delay the manufacturing period and has high manufacturing cost, when the device is used for crystallization of materials with small shrinkage rate, normal crystallization operation can be performed, when the shrinkage rate is large, the large shrinkage of the metal that changes from liquid to solid will affect the product quality, therefore, the material in the expansion pipe 6 is transported through the pressurizing pipe, the expansion pipe 6 expands in the longitudinal groove 5, the longitudinal groove 5 of the tubular body 1 is widened, the opening size of the inlet end of the tubular body 1 is increased, the size of the outlet end of the tubular body 1 is unchanged, the taper of the casting channel 2 is increased, the inner cavity taper of the tubular body 1 is closely combined with the casting metal with high shrinkage rate, and the purpose of good cooling is achieved.

[0050] The tubular body 1 is made of high thermal conductivity material, including but not limited to one or more of TP2, Tag0.1P, CuZrCr or CuNiBe, it should be noted that the material of the tubular body 1 can also use other conventional materials that can be used by persons skilled in the art, which are not enumerated here.

[0051] The tubular body 1 is provided with cooling liquid channels 4 on four sides, and the two ends of the cooling liquid channels 4 are respectively provided with cooling liquid inlets 8 and cooling liquid outlets 9. In order to improve the crystallization efficiency of the tubular body 1, the cooling liquid channels 4 are arranged in the side wall of the tubular body 1. The cooling liquid channels 4 continuously circulate the cooling medium through the cooling liquid inlets 8 and the cooling liquid outlets 9, thereby rapidly cooling and solidifying the internal liquid metal. It should be noted that if the cooling liquid channel 4 is larger, the internal cooling medium will exert a certain pressure on the tubular body 1, thereby causing the tubular body 1 to become smaller. At this time, a pressurized pipeline is needed to transport materials inside the expansion pipe 6, so that the expansion pipe 6 slightly expands in the longitudinal groove 5 to offset the deformation caused by the pressure of the cooling medium on the tubular body 1. The end of the cooling liquid channel 4 can be sealed by a sealing plug 10.

[0052] The outer wall of the tubular body 1 is directly connected to the cooling liquid channel 4. In this embodiment, the cooling liquid channel 4 is arranged on the outer surface 3 of the copper mold wall of the tubular body 1, which can reduce the deformation caused by excessive pressure in the cooling liquid channel 4. The tubular outer wall is directly connected to the cooling liquid channel 4, which is a prior art and will not be described in detail here.

[0053] The longitudinal grooves 5 are arranged in a ring shape on the four side walls of the tubular body 1, and two longitudinal grooves 5 are symmetrically arranged on each side wall. In this embodiment, the expansion pipe 6 is placed in the eight ring-shaped longitudinal grooves 5. The expansion pipe 6 can be placed one or more, and the expansion pipe 6 can exert different pressures according to the metal shrinkage rate, thereby completing the adjustment of the taper of the tubular body 1.

[0054] The shape of the longitudinal groove 5 can be circular, square, triangular or polygonal. It should be noted that the specific shape of the longitudinal groove 5 is not limited in practice. When the expansion pipe 6 expands, pressure can be applied to both sides to complete the taper adjustment.

[0055] The length of the longitudinal groove 5 is less than the length of the tubular body 1, which is convenient for adjusting the taper of the tubular body 1.

[0056] The longitudinal groove 5 is provided with a plurality of expansion pipes 6, and the plurality of expansion pipes 6 are respectively detachably connected to the pressurized pipeline through the combination joint 7. The plurality of expansion pipes 6 are continuously arranged in the longitudinal groove 5, so that the pressure of each expansion pipe 6 can be controlled to control the change of the taper, thereby more accurately controlling the taper of the tubular body 1.

[0057] The expansion pipe 6 is made of high-temperature-resistant rubber pipe, which has good ductility and can uniformly apply pressure to the side wall of the longitudinal groove 5. The material transported by the expansion pipe 6 can be hydraulic oil or cooling water.

[0058] The distance between the bottom of the longitudinal groove 5 and the inner wall of the casting channel 2 is 3-15 mm, and the width of the longitudinal groove 5 is 3-40 mm.

[0059] In another embodiment of the present application, the casting channel 2 inside the tubular body 1 is used for the skull cooling of high-temperature liquid metal, the longitudinal grooves 5 are arranged on the outer surfaces of the four walls of the tubular body 1, the opening direction is on the outer surface of the tubular body 1, the distance between the longitudinal groove 5 and the longitudinal inner casting channel 2 is 5 mm, the longitudinal groove 5 is manufactured by machining, the width of the longitudinal groove 5 is 20 mm, the length direction of the longitudinal groove 5 is consistent with the direction of the casting channel 2 of the tubular body 1, and the length of the longitudinal groove 5 is about half the length of the tubular body 1. One or more high-temperature-resistant rubber tubes are placed in each longitudinal groove 5, the high-temperature-resistant rubber tube is in contact with the longitudinal groove 5 of the copper mold, and the high-temperature-resistant rubber tube can expand in diameter under the pressure of the high-pressure fluid, thereby transmitting the pressure to the longitudinal groove 5 of the tubular body 1. When the tubular body 1 is subjected to pressure from the high-temperature-resistant rubber tube, the longitudinal groove 5 on the tubular body 1 will deform, and the width of the longitudinal groove 5 will increase, and the deformation rule is as follows: the width change of the longitudinal groove 5 near the casting channel 2 of the tubular body 1 is small, and the width change of the longitudinal groove 5 far from the casting channel 2 of the tubular body 1 is large. The high-temperature-resistant rubber tube is connected to a metal joint at both ends, and the metal joint is used for connecting the high-pressure fluid sealing pipeline.

[0060] When the liquid metal enters from the upper end of the casting channel 2 of the tubular body 1, the heat of the high-temperature liquid metal is transmitted to the outer cooling liquid channel 4 of the tubular body 1 through the wall of the tubular body 1, and the cooling medium such as water, oil, etc. passes through the outer cooling liquid channel 4 of the tubular body 1 to take away the heat. The liquid metal in the casting channel 2 of the tubular body 1 gradually lowers the temperature of the part in contact with the wall of the tubular body 1 while the heat is taken away, and the liquid becomes solid. The solid metal in the casting channel 2 of the tubular body 1 will shrink while its temperature decreases, and the shrinkage rule is inconsistent for different pulling speeds and different liquid metal compositions. Taking steel as an example, the low-carbon steel has a larger shrinkage rate, such as Q195 or 08Al, and the linear expansion coefficient at 1300°C is about 130.96x10-6 / °C, and the high-carbon steel has a smaller shrinkage rate, such as Gr15 or 83B, and the linear expansion coefficient at 1300°C is about 71.81x10-6 / °C.

[0061] In the embodiment, the inner cavity of the copper mold casting channel 2 is designed with the minimum shrinkage when the tubular body 1 is manufactured. When the metal composition shrinkage of the casting channel 2 of the tubular body 1 is the minimum, the cooling medium in the cooling liquid channel 4 outside the tubular body 1 applies a certain pressure to the tubular body 1. At this time, the liquid with a small pressure is injected into the high-temperature-resistant rubber tube to resist the compression deformation of the tubular body 1 by the cooling liquid channel 4, ensure that the width of the longitudinal groove 5 on the tubular body 1 does not change, and make the taper of the inner cavity of the casting channel 2 of the tubular body 1 tightly fit with the casting metal. When the metal composition shrinkage of the casting channel 2 of the tubular body 1 is large, the cooling medium in the cooling liquid channel 4 outside the tubular body 1 applies a certain pressure to the tubular body 1. At this time, the liquid with a large pressure is injected into the hydraulic expansion rubber tube to ensure that the longitudinal groove 5 on the tubular body 1 is widened, the wall of the tubular body 1 is deformed, the casting channel 2 protrudes to the cooling liquid channel 4, the size of the casting channel 2 of the tubular body 1 is increased, the size of the casting channel 2 at the entrance is increased due to the arrangement position of the longitudinal groove 5 outside the tubular body 1 being close to the entrance of the casting channel 2, the size of the lower opening of the casting channel 2 is unchanged, the taper of the casting channel 2 is increased, the taper of the inner cavity of the tubular body 1 is tightly fitted with the casting metal with high shrinkage, and the purpose of good cooling is achieved.

[0062] The above-described embodiments only express certain embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A crystallizer copper tube die with adjustable inner cavity taper in-line, characterized by: Comprising A tubular body (1) having at least one wall with a longitudinal groove (5) opened in the direction of the outer surface of the tubular body (1), the longitudinal groove (5) being in the same direction as the casting channel (2) of the tubular body (1) and located at the inlet end; An expansion tube (6) located inside the longitudinal groove (5), at least one end of the expansion tube (6) being provided with a coupling joint (7) for detachable connection with a pressurizing pipeline.

2. The crystallizer copper tube die with online adjustable inner cavity taper according to claim 1, characterized in that: The tubular body (1) is made of high thermal conductivity material, including but not limited to one or more of TP2, Tag0.1P, CuZrCr or CuNiBe.

3. The crystallizer copper tube die of claim 1, wherein: The tubular body (1) has a cooling liquid channel (4) on each of the four sides, and the two ends of the cooling liquid channel (4) are respectively provided with a cooling liquid inlet (8) and a cooling liquid outlet (9).

4. The adjustable internal taper crystallizer copper tube die of claim 1, wherein: The outer wall of the tubular body (1) is directly connected to the cooling liquid channel (4).

5. The adjustable internal taper crystallizer copper tube die of claim 1, wherein: The longitudinal groove (5) is annularly arranged on the four side walls of the tubular body (1), and two longitudinal grooves (5) are symmetrically arranged on each side wall.

6. The adjustable internal taper crystallizer copper tube die of claim 1, wherein: The shape of the longitudinal groove (5) is circular, square, triangular or polygonal.

7. The adjustable internal taper crystallizer copper tube die of claim 1, wherein: The length of the longitudinal groove (5) is less than the length of the tubular body (1).

8. The on-line adjustable internal cavity tapering crystallizer copper tube die according to claim 1, characterized in that: A plurality of expansion tubes (6) are arranged in the longitudinal groove (5), and the plurality of expansion tubes (6) are detachably connected to the pressurizing pipeline through the coupling joint (7).

9. The on-line adjustable internal cavity tapering crystallizer copper tube die according to claim 1, characterized in that: The expansion tube (6) is made of high-temperature-resistant rubber tube and has good ductility.

10. The adjustable internal taper crystallizer copper tube die of claim 1, wherein: The distance between the bottom of the longitudinal groove (5) and the inner wall of the casting channel (2) is 3-15 mm, and the width of the longitudinal groove (5) is 3-40 mm.

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