A copper tube water jacket assembly structure, a method for using the same and a continuous casting machine crystallizer

Abstract

This invention provides a copper tube-water jacket combination structure, its usage method, and a continuous casting machine crystallizer. The water jacket is fitted around the copper tube, with a gap between the outer surface of the copper tube and the inner surface of the water jacket. The inner surface of the water jacket has N grooves extending parallel to the axial direction, where N is an integer greater than or equal to 2. Each groove corresponds to a separating strip; one side of the separating strip extends into the groove along its depth direction, and the other side connects to the outer surface of the copper tube, forming N channels extending parallel to the axial direction for the flow of liquids or gases. When this copper tube-water jacket combination structure is used in a continuous casting machine crystallizer, it can significantly reduce costs and improve production efficiency. Furthermore, the water cooling efficiency and uniformity can be adjusted by regulating the channel structure according to actual needs.

Description

Technical Field

[0001] This invention belongs to the fields of mechanical technology and iron and steel metallurgy technology, and particularly relates to a copper tube water jacket combination structure, its usage method and continuous casting machine crystallizer. Background Technology

[0002] The crystallizer, often referred to as the "heart" of a continuous casting machine, is closely related to the quality and output of the produced billets. It mainly consists of three parts: copper tubes, a water jacket, and an outer shell. The molten steel inside the copper tubes is continuously cooled to form the billet shell. A water gap is created between the copper tubes and the water jacket, allowing high-speed flowing cooling water to carry away the heat from the copper tubes, thus achieving cooling. The outer shell supports the copper tubes and water jacket and connects the water gap to external cooling water pipes. Clearly, the copper tubes and water jacket are the core components of the crystallizer.

[0003] Achieving efficient and uniform cooling of the cast billet through copper tube cooling is crucial. Uneven cooling, with varying cooling intensities around the billet's cross-section, results in inconsistent shell thickness, leading to production accidents such as leakage and detachment of the shell after exiting the crystallizer. Currently, grooves are typically engraved on the outer surface of the copper tube to improve cooling efficiency and uniformity. For example, patent CN208960940U incorporates water troughs 6-16mm wide and 4-10mm deep at the corners of the copper tube's outer surface. The depth of the troughs gradually decreases from top to bottom along the length of the copper tube, exhibiting a hyperbolic distribution. This distribution curve is determined based on boundary conditions such as steel grade and casting speed, ensuring that the heat transfer intensity along the casting direction matches the heat transfer intensity of the copper tube's hot surface along the casting direction. The circumferential dimensions and arrangement of the water troughs meet the requirement of uniform heat transfer between the inner surface of the copper tube and the cast billet, effectively solving the problems of uniform and efficient heat transfer in the copper tube. However, this grooving technology requires CNC precision machining on the copper tube, and each copper tube may need to have 30-50 grooves, approximately 900m long, grooving, resulting in high time and processing costs. For example, patent CN207642259U also grooves the corners of the copper tube, and patent CN115351248A sets grooves on the outer surface of the copper tube, with the density of the first groove near the chamfer being greater than the density of the second groove further away from the chamfer, thereby increasing the uniformity of surface temperature distribution on the continuously cast billet. However, both of these technologies also face the problems of long copper tube production time and high processing costs.

[0004] Patent CN210848241U discloses a combined, repairable, high-speed crystallizer for small square billets. This technology essentially transplants the plate crystallizer technology used for large-section rectangular billets to a crystallizer for small-section square billets. It primarily highlights the repairability of wear when the copper plate has a certain thickness (40-65mm) and the benefits of uniform cooling brought about by grooves on the outer surface of the copper plate. This technology is a beneficial attempt to increase the lifespan of copper tubes, but it may bring other disadvantages: First, the high drawing speed of small square billets necessitates that the crystallizer design prioritize rapid heat exchange; excessively thick copper plates (far exceeding the conventional thickness of around 14mm) will affect the rapid heat exchange. Second, grooving on excessively thick copper plates will diminish the uniform cooling effect due to low heat exchange efficiency. Third, the current speed-increasing effect of grooved copper tubes allows for a steel throughput of up to 10,000 tons; even if a crystallizer using thick copper plates can be repaired, it offers no significant economic advantage.

[0005] Patent CN111136229A discloses a copper tube-water jacket combination structure for crystallizers. The outer surface of the copper tube is grooved, and a non-metallic material is used to wrap the copper tube, replacing the conventional metal water jacket. The inner surface of the wrapping material and the water groove outside the copper tube form a cooling channel, achieving efficient and uniform cooling. Using a non-metallic wrapping material to replace the traditional water jacket is beneficial for improving the energy efficiency of crystallizers using electric stirring and for on-site copper tube replacement. However, the high manufacturing requirements, long production cycle, high manufacturing cost, and the need for product returns due to defects limit the widespread adoption of this technology.

[0006] In summary, existing technologies for efficient and uniform cooling of the billet in the crystallizer have the following shortcomings:

[0007] (1) Copper tubes are consumables that are frequently replaced. High-precision grooving on a large number of copper tubes is not only costly but also time-consuming. Spare parts are needed to overcome the problem of long supply cycles.

[0008] (2) Repairable grooved copper plates have unsatisfactory performance and cost on small cross-section billet casting machines;

[0009] (3) The integrated copper tube water jacket structure with grooved copper tube covered with non-metallic materials has too high requirements for manufacturing process and is currently difficult to promote on a large scale.

[0010] (4) In addition, the current mature high-efficiency crystallizer schemes generally use grooved copper tubes in conjunction with precision-machined water jackets. In order to facilitate the assembly of copper tubes, there is a gap of about 0.5-1mm between the outer wall of the water tank and the inner diameter of the water jacket on the outer surface of the actual copper tube. On the one hand, due to the existence of this gap, it is difficult to achieve true isolation of water flow between water tanks to achieve the ideal uniform heat exchange effect. On the other hand, the gap is too small to achieve true rapid replacement of crystallizer copper tubes. Summary of the Invention

[0011] In view of the above-mentioned technical status, the present invention provides a copper tube water jacket combination structure, which is simple in structure and low in cost, and can provide a channel for liquid or gas flow on the outer surface of the copper tube, and has good application prospects in continuous casting machine crystallizers and other technologies.

[0012] The technical solution adopted in this invention is: a copper pipe and water jacket combination structure, wherein the water jacket is sleeved around the copper pipe, and there is a gap between the outer surface of the copper pipe and the inner surface of the water jacket.

[0013] The inner surface of the water jacket is provided with N grooves extending parallel to the axial direction, where N is an integer greater than or equal to 2; each groove corresponds to an isolation strip, and one side of the isolation strip extends into the groove along the depth direction of the groove, while the other side of the isolation strip is connected to the outer surface of the copper tube, forming N channels extending parallel to the axial direction.

[0014] The copper tube has a tubular structure with openings at both ends. Its axial direction is the axial direction described in this invention. The cross-section perpendicular to the copper tube's axial direction is the cross-section described in this invention, and the cross-section parallel to the copper tube's axial direction is the longitudinal section described in this invention. Along the axial direction, the end of the copper tube with one opening is called the top end, and the end of the copper tube with the other opening is called the bottom end. The top end and bottom end can be used for grooves and partition strips. That is, along the axial direction, the two ends of the groove are called the top end and bottom end of the groove, and the two ends of the partition strip are called the top end and bottom end of the partition strip.

[0015] The axial direction refers to the axial direction of the copper tube, the cross section refers to the cross section perpendicular to the copper tube axis, and the longitudinal section refers to the cross section parallel to the copper tube axis.

[0016] The length L1 of the copper tube is not limited. When the copper tube water jacket combination structure is used in the continuous casting machine crystallizer, the length L1 of the copper tube is determined according to the actual situation of the crystallizer, for example, the length is 800mm-1000mm.

[0017] The length L2 of the water jacket and the length of each groove are not limited. To increase the channel length, the length L2 of the water jacket and the length of each groove are comparable to, and preferably equal to, the length L1 of the copper tube. When the copper tube and water jacket assembly structure is used in the continuous casting machine crystallizer, other accessories need to be assembled. Preferably, the length L2 of the water jacket and the length of each groove are less than or equal to the length L1 of the copper tube.

[0018] The length L3 of the isolation strip is not limited, and is generally equivalent to the length of the groove and the length L1 of the copper tube. When the copper tube water jacket combination structure is used in the continuous casting machine crystallizer, other accessories need to be assembled. Preferably, the length L3 of the isolation strip is less than or equal to the length L1 of the copper tube.

[0019] The depth H1 of each groove refers to the distance from the opening end of the groove to the bottom of the groove.

[0020] Liquids or gases can flow through the various channels. To prevent interference between the liquids or gases flowing through each channel, preferably, each isolation strip is sealed to the groove and to the outer surface of the copper tube. As one implementation, the isolation strips are made of a soft material, such as a metal or non-metal softer than the copper tube, which facilitates sealing.

[0021] This invention allows for the adjustment of one or more of the following adjustment channel structures: a groove structure, including the groove cross-sectional shape, groove depth, groove length, and centerline spacing between adjacent grooves; and / or a separator strip structure, including the separator strip cross-sectional shape and the shape of the separator strip extending into the groove. The cross-sectional shape of the groove is not limited; it can be a regular shape, such as a rectangle or an arc, or an irregular shape. Similarly, the cross-sectional shape of the separator strip is not limited; it can be a regular shape, such as a rectangle or an arc, or an irregular shape.

[0022] The top width of the groove is denoted as W1, and the bottom width is denoted as W2. The width of the groove decreases from the top to the bottom, meaning that the longitudinal cross-section of the groove has an inverted conical structure, and W1 > W2.

[0023] The top width of the isolation strip inserted into the groove is denoted as W3, and the bottom width as W4. The top width of the isolation strip connected to the outer surface of the copper pipe is denoted as W5, and the bottom width as W6. Preferably, the shape of the isolation strip inserted into the groove matches the structure of the groove, i.e., W3 = W1, W4 = W2, thereby enabling tight insertion and sealing. In this case, the longitudinal section of the isolation strip is preferably an inverted conical structure, and more preferably, the longitudinal section of the resulting channel is conical. This inverted conical isolation strip facilitates the assembly and disassembly of the copper pipe water jacket assembly structure. For example, during assembly, the copper pipe is placed inside the water jacket, and the inverted conical isolation strip is wedged into the groove from the top to the bottom. During disassembly, the inverted conical isolation strip is pushed out from the bottom to the top of the groove, and then the copper pipe is removed.

[0024] The cross-sectional structure of the copper tube is not limited and can be circular or angled, such as a rectangle, triangle or other polygons, including rectangles with chamfers.

[0025] When the copper tube water jacket combination structure is used in the continuous casting machine crystallizer, the copper tube is preferably a drawn copper tube for the continuous casting machine crystallizer.

[0026] Preferably, the channels are evenly distributed on the outer surface of the copper tube. The cross-sectional structure of the copper tube is not limited; it can be circular, elliptical, or angled, such as a rectangle, triangle, or other polygon. Rectangles include chamfered rectangles. When the copper tube has a chamfered cross-section, grooves and isolation strips can be provided at the chamfers, with the channels positioned between adjacent chamfers. Alternatively, the channels can be positioned at the chamfers themselves. When grooves and isolation strips are provided at the chamfers, a groove structure matching the chamfer shape and an isolation strip structure matching the groove structure are provided. In this case, the channels are preferably evenly distributed between adjacent chamfers. The chamfers are preferably arc-shaped chamfers; more preferably, the arc angle R1 of the chamfer is 45°-90°.

[0027] When the copper tube water jacket combination structure is used in the continuous casting machine crystallizer, the copper tube is preferably a drawn copper tube for the continuous casting machine crystallizer.

[0028] When the copper tube water jacket combination structure is used in the continuous casting machine crystallizer, each channel serves as a cooling water channel. Considering that the heat exchange demand is greater near the top of the copper tube compared to the bottom, it is preferable that each channel has a positive conical structure from top to bottom. As the water flows from the bottom to the top of the channel, the flow velocity gradually increases as the cross-section gradually decreases, and the heat exchange effect gradually enhances. This better conforms to the rule that the heat exchange demand is greater near the top of the copper tube and less near the top, facilitating the formation of a uniform shell during the downward movement of the billet. To achieve this positive conical structure of the channel, as one implementation method, the longitudinal section of two adjacent isolation strips is an inverted cone. The channel formed by these two isolation strips, the copper tube, and the groove has a positive conical structure. Preferably, the structure of the isolation strip extending into the groove matches the structure of the groove to form a tight contact, and the structure of the isolation strip connected to the copper tube matches the outer surface structure of the copper tube to form a tight contact. In this case, preferably, the width of the groove gradually decreases from the top to the bottom of the groove along the parallel axial direction. The inverted conical isolation strips facilitate the assembly and disassembly of the crystallizer. The assembly method is as follows: place the copper tube inside the water jacket, and wedge the inverted conical isolation strip into the groove from the top to the bottom. Preferably, wedging stops when the top of the isolation strip is flush with the top of its corresponding groove. More preferably, the length of each isolation strip is equal to the length of its corresponding groove. The disassembly method is as follows: after removing the components from the crystallizer shell used to fix the copper tube and water jacket assembly, push each inverted conical isolation strip out from the bottom to the top of the groove, thus separating the copper tube from the water jacket.

[0029] When the copper tube water jacket combination structure is used in the continuous casting machine crystallizer:

[0030] As a preferred structure, L1 is in the range of 800mm-1000mm;

[0031] As a preferred structure, L2 is in the range of 800mm-1000mm;

[0032] As a preferred structure, L3 is in the range of 800mm-1000mm;

[0033] As a preferred structure, the H1 value is in the range of 3mm-15mm;

[0034] As a preferred structure, H2 is in the range of 5mm-21mm;

[0035] As a preferred structure, D1 is in the range of 3mm-30mm;

[0036] As a preferred structure, D2 is in the range of 2mm-12mm;

[0037] As a preferred structure, the chamfer arc angle R1 is in the range of 45°-90°;

[0038] As a preferred structure, W1 is in the range of 3mm-25mm, and W2 is in the range of 3mm-25mm;

[0039] As a preferred structure, W3 is in the range of 3mm-25mm, and W4 is in the range of 3mm-25mm;

[0040] As a preferred structure, W5 is in the range of 3mm-25mm, and W6 is in the range of 3mm-25mm.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] (1) Instead of grooving the copper tubes that are frequently replaced, this invention grooves the inner surface of the water jacket and forms a channel for liquid or gas flow with the help of the isolation strip. On the one hand, the cost and difficulty of grooving the water jacket is lower than that of precision grooving the copper tube, thus greatly reducing the cost and improving the efficiency of grooving. On the other hand, both the water jacket and the isolation strip can be reused and are replaced less frequently than the copper tube. Even if the isolation strip is consumed in small amounts during use, its manufacturing time and procurement cost are much lower than those of precision copper tubes, thus greatly reducing the production cost and achieving a uniform cooling effect.

[0043] (2) The present invention uses an isolation strip that extends into the groove of the water jacket. The positioning accuracy is high, which makes it easy to realize the channel structure. Moreover, the isolation strip is simple to prepare and has low cost. Compared with realizing the channel by precision machining of grooves on the outer surface of the copper tube, the cost is greatly reduced and the preparation efficiency is improved. In particular, when the isolation strip forms a sealed connection with the groove of the water jacket and the outer surface of the copper tube, each channel is isolated from each other, which also solves the problem of gas or liquid crosstalk between channels.

[0044] (3) The present invention can adjust the channel structure by adjusting the groove structure, including the groove cross-sectional shape, groove depth, groove length, center line spacing between adjacent grooves, and the isolation strip structure, including the isolation strip cross-sectional shape, the shape of the isolation strip extending into the groove, etc.

[0045] (4) The copper tube water jacket assembly structure of the present invention is easy to assemble and disassemble. During assembly, the copper tube is placed inside the water jacket, and then each isolation strip is inserted, so that one side of each isolation strip extends into the groove along the depth direction of the groove, and the other side is connected to the outer surface of the copper tube. During disassembly, each isolation strip is pulled out and the copper tube is removed. In particular, when the isolation strip is preferably inverted conical in shape from the top to the bottom, each isolation strip can be wedged into the corresponding groove from the top to achieve the centering of the copper tube. During disassembly, each inverted conical isolation strip is pushed out from the bottom to the top and the copper tube and the water jacket are naturally separated.

[0046] (5) The copper tube water jacket combination structure of the present invention can be used in the crystallizer of a continuous casting machine. By adjusting one or more of the following: the groove structure, including the groove cross-sectional shape, groove depth, groove length, and centerline spacing between adjacent grooves; and the isolation strip structure, including the isolation strip cross-sectional shape and the shape of the isolation strip extending into the groove, the channel structure can be adjusted, thereby adjusting the water cooling efficiency and water cooling uniformity according to actual needs. For example, adjusting the channel to a conical structure is beneficial for forming a uniform billet shell during the downward movement of the billet. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the longitudinal cross-section of the copper pipe water jacket combination structure in Embodiment 1 of the present invention.

[0048] Figure 2 This is a schematic diagram of the cross-sectional structure of the copper pipe water jacket combination structure in Embodiment 1 of the present invention.

[0049] Figure 3 This is a partial cross-sectional view of the copper pipe water jacket assembly structure along the AA direction in Embodiment 1 of the present invention.

[0050] Figure 4 These are schematic diagrams of three common cross-sectional structures of spacer strips.

[0051] Figure 5 yes Figure 4 A schematic diagram showing the combination of three types of isolation strips with copper pipe water jackets.

[0052] Figures 1 to 5 The reference numerals and letter markings in the diagram are: 101-water jacket, 102-isolation strip, 103-copper pipe.

[0053] L1 - Copper pipe length

[0054] L2 - Water jacket length

[0055] L3 - Separator bar length

[0056] D1 - Spacing between the center lines of adjacent grooves

[0057] D2 - Distance between the outer surface of the copper pipe and the inner surface of the water jacket.

[0058] H1 - Groove depth

[0059] H2 - Overall thickness of the separation strip

[0060] W1 - Top width of the groove

[0061] W2 - Bottom width of the groove

[0062] W3 / W4 - Width of the partition strip extending into the groove side, where W3 is the top width and W4 is the bottom width.

[0063] W5 / W6 - Width of the insulating strip connecting the copper pipe side, W5 is the top width, W6 is the bottom width.

[0064] R1 - Chamfered arc angle Detailed Implementation

[0065] The present invention will be further described in detail below with reference to the embodiments. It should be noted that the embodiments described below are intended to facilitate the understanding of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention are still within the protection scope of the present invention.

[0066] Example 1:

[0067] like Figure 1-2 As shown, the copper pipe-water jacket assembly structure includes a copper pipe 103, a water jacket 101, and several isolation strips 102. The water jacket 101 is fitted around the copper pipe 103, and there is a gap D2 between the outer surface of the copper pipe 103 and the inner surface of the water jacket 101. The inner surface of the water jacket 101 is provided with 32 grooves extending along a direction parallel to the axial direction. Each groove corresponds to an isolation strip 102. One side of the isolation strip extends into the corresponding groove, and the other side of the isolation strip is connected to the outer surface of the copper pipe 103, forming 32 channels parallel to the axial direction.

[0068] The channel can be used for the flow of liquids, gases, etc. The structure of the channel can be adjusted according to actual needs. This adjustment can be achieved by modifying one or more of the following: the cross-sectional shape of the grooves, the groove depth, the groove length, the center-line spacing between adjacent grooves, and the isolation strip structure, including the cross-sectional shape of the isolation strip and the shape in which the isolation strip extends into the groove.

[0069] In this embodiment, as Figure 2As shown, the copper tube has a rectangular cross-section with curved chamfers. The angle R1 of the four chamfers is 90°. Channels are set between adjacent chamfers; that is, grooves and isolation strips are set at the chamfers. The groove structure at the four chamfers is adapted to the chamfer and is curved. The angle of the curved groove is 90°, and the shape of the isolation strip matches the shape of the groove. Channels can also be set at the chamfers when needed.

[0070] In this embodiment, the cross-sectional shape of the groove structure between the chamfers is the same, and the depth H1 of each groove is the same.

[0071] In this embodiment, the center line spacing D1 between adjacent grooves between chamfers is equal, but the center line spacing between adjacent grooves can also be set to be unequal according to actual needs.

[0072] In this embodiment, as Figure 3 As shown, along a direction parallel to the axial direction, the width of each groove between the chamfers refers to the distance from one sidewall of the groove to the other. From the top to the bottom of the groove, the width of each groove decreases, meaning the longitudinal cross-section of the groove has an inverted conical structure. Figure 3 The top width W1 of each groove is greater than the bottom width W2.

[0073] In this embodiment, the structure on one side of each isolation strip inserted into the groove between the chamfers matches the structure of the inserted groove, i.e., W3=W1, W4=W2, so that they can form a tight connection and achieve a sealed contact.

[0074] In this embodiment, the cross-sectional shape of each groove provided between the chamfers is as follows: Figure 4 The central diagram shows a rectangle, and the cross-sections of each corresponding isolation strip are also rectangular. The longitudinal cross-sections of each corresponding isolation strip are shown below. Figure 3 As shown, the structure is inverted conical, with each channel formed by the isolation strip 102, copper pipe 103, and water jacket 101 having a conical structure. A schematic diagram showing the interaction between the isolation strip, copper pipe, and water jacket positioned between the chamfers is shown below. Figure 5 As shown in the topmost image.

[0075] In this embodiment, the copper pipe length L1 is 1000mm, the water jacket length L2 is 900mm, and the isolation strip length L3 is 900mm.

[0076] In this embodiment, the top width W1 of each groove between the chamfers is 7mm, the bottom width W2 is 5mm, the groove depth H1 is 4mm, the center-line distance between adjacent grooves D1 is 12mm, the distance D2 between the outer surface of the copper pipe and the inner surface of the water jacket is 6mm, and the overall thickness of the isolation strip H2 = D2 + H1 = 10mm. The top width W3 of each isolation strip extending into the groove between the chamfers is W1, the bottom width W4 is W2, the top width W5 is W3, and the bottom width W6 is W4. The groove taper A1 is defined as ((W1-W2) / W1) / L2, in % / m, and the taper A2 of the isolation strip extending into the groove is defined as ((W3-W4) / W3) / L3, in % / m. In this embodiment, A2 = A1.

[0077] In this example, the channel between the corners is a right cone shape, with a 6mm×5mm rectangular cross-section at the top and a 6mm×7mm rectangular cross-section at the bottom. The channel length is equal to the length of the isolation strip, which is 900mm.

[0078] The copper tube water jacket assembly structure in this embodiment can be used in the continuous casting machine crystallizer. In this case, each channel is used as a cooling water channel. During cooling, such as Figure 3 As indicated by the arrows, the cross-section gradually decreases and the flow velocity gradually increases as the water flows from the bottom to the top of the channel, thus enhancing the heat exchange effect. This aligns with the principle that the heat exchange demand is greater near the top of the copper tube and less near the bottom, facilitating the formation of a uniform shell as the billet moves downward (from the top to the bottom).

[0079] In this embodiment, the assembly method of the copper tube water jacket structure in the continuous casting machine crystallizer is as follows: The copper tube is placed inside the water jacket, and the inverted conical isolation strip is wedged into the groove of the water jacket from top to bottom. Specifically, the top of the isolation strip is tapped, causing its small end (5mm wide) to move downwards 7mm from the top of the groove in the water jacket. When the top of the isolation strip is aligned with the top of the groove, the copper tube will naturally be centered. The method of removing the copper tube water jacket is as follows: After removing the components that fix the copper tube water jacket to the crystallizer shell, the inverted conical isolation strip is pushed out from bottom to top (from bottom to top). After all the isolation strips around the copper tube are pushed out, the copper tube will naturally detach.

[0080] Example 2:

[0081] In this embodiment, the copper pipe water jacket assembly structure is basically the same as that in Embodiment 1, except that the longitudinal cross-section of each isolation strip set between the chamfers is as follows: Figure 4 The leftmost diagram shows the arrangement of the spacer strip between the chamfers with the copper pipe and water jacket. Figure 5As shown in the middle diagram, the top width of the isolation strip connected to the copper tube is W5 = W3 + 2mm, the bottom width is W6 = W4 + 2mm, A2 = A1, D1 is 15mm, the top cross-section is a rectangle of 6mm × 6mm, and the bottom cross-section is a rectangle of 6mm × 8mm.

[0082] Example 3:

[0083] In this embodiment, the copper pipe water jacket assembly structure is basically the same as that in Embodiment 1, except that the longitudinal cross-section of each isolation strip set between the chamfers is as follows: Figure 4 The rightmost diagram shows the arrangement of the spacer strip between the chamfers with the copper pipe and water jacket. Figure 5 The bottom image is shown below.

[0084] Example 4:

[0085] In this embodiment, the copper pipe water jacket assembly structure is basically the same as that in Embodiment 1, except that the centerline spacing D1 between adjacent grooves located at the corners is different, with a larger D1 value near the corners; in addition, the longitudinal section of the isolation strip near the corners is as follows: Figure 4 As shown in the middle diagram, the longitudinal section of the isolation strip away from the corner is as follows: Figure 4 As shown in the leftmost image.

[0086] Finally, it should be noted that the specific embodiments described herein are merely illustrative of the spirit of the invention and are not intended to limit the implementation of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them; it is neither necessary nor possible to exemplify all embodiments here. However, these obvious variations or modifications derived from the essential spirit of the invention still fall within the scope of protection of the invention, and interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A copper pipe-water jacket assembly structure, wherein the water jacket is fitted around the copper pipe, and a gap exists between the outer surface of the copper pipe and the inner surface of the water jacket; characterized in that: The inner surface of the water jacket is provided with N grooves extending parallel to the axial direction of the copper tube, where N is an integer greater than or equal to 2; each groove corresponds to an isolation strip, and one side of the isolation strip extends into the groove along the depth direction of the groove, while the other side of the isolation strip connects to the outer surface of the copper tube, forming N channels extending parallel to the axial direction.

2. The copper pipe water jacket assembly structure as described in claim 1, characterized in that: Each isolation strip is sealed to the groove, and each isolation strip is sealed to the outer surface of the copper tube.

3. The copper pipe water jacket assembly structure as described in claim 1, characterized in that: The isolation strip is made of a soft material.

4. The copper pipe water jacket assembly structure as described in claim 3, characterized in that: The isolation strip is made of a metal or non-metal that is softer than a copper tube.

5. The copper pipe water jacket assembly structure as described in claim 1, characterized in that: The channel structure can be adjusted by adjusting the groove structure and / or the isolation strip structure; The groove structure includes one or more of the following: groove cross-sectional shape, groove depth, groove length, and centerline spacing between adjacent grooves; The isolation strip structure includes one or both of the following: the cross-sectional shape of the isolation strip and the shape in which the isolation strip extends into the groove.

6. The copper pipe water jacket assembly structure as described in claim 1, characterized in that: The width of the groove decreases from the top to the bottom, meaning the longitudinal cross-section of the groove has an inverted conical structure.

7. The copper pipe water jacket assembly structure as described in claim 1, characterized in that: The shape of the insulating strip inserted into the groove side matches the structure of the groove into which it is inserted, thus forming a sealed contact.

8. The copper pipe water jacket assembly structure as described in claim 1, characterized in that: The structure of the insulating strip on the side connected to the copper tube matches the structure of the outer surface of the copper tube to form a sealed contact.

9. The copper pipe water jacket assembly structure as described in claim 5, characterized in that: The longitudinal section of the isolation strip has an inverted conical structure, and the longitudinal section of the resulting channel has a conical structure.

10. The copper pipe water jacket assembly structure as described in claim 1, characterized in that: When the cross-section of the copper tube is chamfered, a groove and a partition strip are provided at the chamfer, and the channel is provided between adjacent chamfers; or, a channel is provided at the chamfer.

11. The copper pipe water jacket assembly structure as described in claim 10, characterized in that: The arc angle R1 of the chamfer is 45°-90°.

12. The method of using the copper pipe water jacket assembly structure as described in any one of claims 1-11, characterized in that: During assembly, place the copper tube inside the water jacket, then insert each isolation strip, so that one side of each isolation strip extends into the groove along the depth direction of the groove, and the other side connects to the outer surface of the copper tube; during disassembly, remove each isolation strip and then take out the copper tube.

13. The method of using the copper pipe water jacket assembly structure as described in claim 12, characterized in that: When the longitudinal section of the isolation strip is an inverted conical structure, during assembly, the copper tube is placed inside the water jacket, and the inverted conical isolation strip is wedged into the groove from the top to the bottom; during disassembly, the inverted conical isolation strip is pushed out from the bottom to the top of the groove and the copper tube is removed.

14. A continuous casting machine crystallizer, characterized in that: It includes the copper pipe water jacket assembly structure as described in any one of claims 1 to 11.

Images