Finish machining inner water jacket for crystallizer

Abstract

The utility model relates to the technical field of inner water jackets, in particular to a finish machining inner water jacket for a crystallizer, which comprises a square barrel and a flange arranged on the square barrel, and further comprises a support plate and a plurality of mushroom head screws, the support plate is arranged at the end of the square barrel and positioned on one side of the flange, a hoisting opening is formed in the support plate, and the mushroom head screws are arranged in the hoisting opening. A plurality of positioning holes are evenly formed in the square barrel, each mushroom head screw is fixed to the corresponding positioning hole, and a mushroom head of each mushroom head screw is located in the square barrel. According to the finish machining inner water jacket for the crystallizer, firstly, the mushroom head screws are used for replacing outer hexagon screws, after the mushroom head screws are installed on the positioning holes, people do not need to repeatedly adjust the positions of the mushroom head screws, and the positions of the mushroom head screws are fixed, so that automatic positioning of water seams is achieved; the mounting efficiency and the mounting precision of the mushroom head screw are high; and secondly, a supporting plate is designed, and a hoisting opening in the supporting plate achieves overall installation and hoisting of the finish-machined inner water jacket.

Description

Technical Field

[0001] The utility model relates to the technical field of inner water jackets, in particular to a precision-machined inner water jacket for a crystallizer. Background Art

[0002] The principle of continuous casting is to pour molten metal into the crystallizer continuously, and then pull the solidified (crusted) casting out of the crystallizer continuously to obtain castings of any length. In the production of continuous steel casting, an inner water jacket is required; the copper tube of the crystallizer should be installed in the inner water jacket with a water gap between the two. The water in the water gap is used to cool the inner water jacket and the copper tube of the crystallizer installed in the inner water jacket.

[0003] The old-style inner water jacket is usually assembled from a square cylinder, an intermediate flange, struts, adjusting screws and nuts.

[0004] The old inner water jacket has the following problems:

[0005] 1. The old-fashioned inner water jacket uses an external hexagon screw to adjust the water gap. The external hexagon screw needs to be adjusted manually, which has low installation efficiency and poor installation accuracy. Poor accuracy will cause uneven water gaps, which will cause uneven cooling of the steel billet and produce de-squareness, thereby affecting the quality of the steel billet.

[0006] 2. There is no lifting structure, and the installation and lifting of the old inner water jacket is extremely inconvenient.

[0007] 3. The square cylinder has poor rigidity, is easy to change, and has poor resistance to deformation.

[0008] Therefore, there is an urgent need for a finely machined inner water jacket for a crystallizer to solve the above problems. Utility Model Content

[0009] In order to solve the technical problems that when the old inner water jacket adopts external hexagonal screws to adjust the water seam, the installation efficiency is low, the installation accuracy is poor, and there is no lifting structure arranged thereon, and the rigidity of the square cylinder is poor, the utility model provides a fine-machined inner water jacket for a crystallizer. Firstly, mushroom head screws are used instead of external hexagonal screws. After the mushroom head screws are installed in the positioning holes, people do not need to adjust their positions repeatedly. The positions of the mushroom head screws are fixed to realize automatic positioning of the water seam, and the mushroom head screws have high installation efficiency and installation accuracy. Secondly, a support plate is designed, and the lifting opening on the support plate realizes the overall installation and lifting of the fine-machined inner water jacket. In addition, the rigidity of the square cylinder is enhanced and it is not easy to deform.

[0010] The utility model provides a fine-machined inner water jacket for a crystallizer, comprising a square cylinder and a flange arranged on the square cylinder, the fine-machined inner water jacket also comprising a support plate and a plurality of mushroom head screws, the support plate being arranged at the end of the square cylinder and located on one side of the flange, a hoisting opening being provided on the support plate, a plurality of positioning holes being evenly provided on the square cylinder, each of the mushroom head screws being fixed on the positioning hole, and the mushroom head of each of the mushroom head screws being located in the square cylinder. The square cylinder, the flange and the support plate are welded together to achieve a fixed connection, after which a person manually screws the mushroom head screws from the inside of the square cylinder into the positioning hole, and screws the mushroom head screws to the bottom, and the person does not need to repeatedly adjust the position of the mushroom head screws.

[0011] Furthermore, each of the mushroom head screws includes an integrally formed mushroom head and a screw rod, the mushroom head is hemispherical, and the screw rod is fixed on the positioning hole. Since the mushroom head is hemispherical, the contact between the mushroom head and the outer wall of the copper tube is point contact, and the point contact between the mushroom head and the outer wall of the copper tube does not scratch the outer wall of the copper tube.

[0012] Furthermore, the square cylinder includes two fixedly connected U-shaped water jackets, the flanges and the support plates are arranged at the ends of the two U-shaped water jackets, and a plurality of the positioning holes are evenly arranged on the two U-shaped water jackets.

[0013] Furthermore, the two side walls of the two U-shaped water jackets are abutted against and fixedly connected, and the two side walls of the two U-shaped water jackets are provided with ribs located outside the U-shaped water jackets, and the ribs on the two U-shaped water jackets are fixedly connected.

[0014] Furthermore, the rib plate is in the shape of a long strip, and a plurality of fastening holes are formed on the rib plate. The fastening holes on the two rib plates are fixedly connected by fastening bolts and fastening nuts, and washers are provided between each of the fastening bolts and the rib plate. The fastening bolts and fastening nuts realize the fixed connection of the rib plates on the two U-shaped water jackets, and the washers prevent the fastening bolts from slipping.

[0015] Furthermore, the rib plate is provided with a plurality of pin holes, and the pin holes and the fastening holes are arranged at intervals, and the pin holes on the two rib plates are fixedly connected by pins. The pins further stably connect the rib plates on the two U-shaped water jackets.

[0016] Furthermore, a plurality of reinforcing ribs are provided on the outer surfaces of the two U-shaped water jackets, and the plurality of reinforcing ribs are located on the side opposite to the flange and the support plate. The reinforcement ribs are provided to further enhance the structural strength of the two U-shaped water jackets.

[0017] Furthermore, the two U-shaped water jackets are both curved; the two U-shaped water jackets are both curved; the two U-shaped water jackets are both provided with a first slot at one end of the support plate, and the two U-shaped water jackets are both provided with a second slot at the other end. The second slot is provided to increase the cooling water flow through the water gap, thereby enhancing the cooling effect.

[0018] Furthermore, a plurality of the support plates are provided, and the plurality of the support plates are circumferentially arranged along the outer wall of the square cylinder.

[0019] Furthermore, the flange includes two semicircular rings that are fixedly connected, and the two semicircular rings are arranged on the square cylinder.

[0020] Compared with the prior art, the utility model has the following technical effects:

[0021] 1. The square cylinder, flange and support plate are welded together to achieve a fixed connection. After that, people manually screw the mushroom head screws from the inside of the square cylinder into the positioning hole and screw the mushroom head screws to the bottom. People do not need to repeatedly adjust the position of the mushroom head screws. After multiple mushroom head screws are installed, the mushroom heads of the multiple mushroom head screws form an area for fixing the copper tube of the crystallizer. When the fine-machined inner water jacket is in use, the copper tube of the crystallizer is inserted into the inner cavity of the square cylinder and stuck between the mushroom heads of the multiple mushroom head screws. The multiple mushroom heads fix the copper tube. Because the mushroom heads have a certain thickness, there is a gap between the inner wall of the square cylinder and the copper tube at this time, and the gap becomes a water gap. The mushroom head screws can realize the automatic positioning of the water gap, and the water gap is automatically and evenly adjusted in place without manual adjustment.

[0022] 2. A support plate is designed, and the lifting opening on the support plate realizes the overall installation and lifting of the finely machined inner water jacket.

[0023] 3. After setting the ribs and reinforcing ribs, the rigidity of the square cylinder is enhanced and it is not easy to deform, and its anti-deformation ability is greatly enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a precision-machined inner water jacket for a crystallizer of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the mushroom head screw of the utility model when it is installed on the positioning hole;

[0026] Figure 3 It is a schematic cross-sectional structure diagram of the precision-machined inner water jacket of the utility model;

[0027] Figure 4 This utility model Figure 3 Schematic diagram of the cross-sectional structure at the middle BB;

[0028] The reference numerals in the accompanying drawings are:

[0029] 1. Square cylinder; 11. Positioning hole; 12. Rib plate; 13. Fastening bolt; 14. Fastening nut; 15. Pin; 16. Reinforcement rib; 17. First slot; 18. Second slot; 19. Washer;

[0030] 2. Flange; 21. Sealing cylinder;

[0031] 3. Support plate; 31. Lifting opening;

[0032] 4. Mushroom head screws;

[0033] 5. Fix the nut. DETAILED DESCRIPTION

[0034] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0035] like Figures 1 to 4 As shown, it includes a square cylinder 1 and a flange 2 arranged on the square cylinder 1, and the finely machined inner water jacket also includes a support plate 3 and a plurality of mushroom head screws 4. The support plate 3 is arranged at the end of the square cylinder 1 and is located on one side of the flange 2. The lifting opening 31 has an arc to facilitate the connection between the support plate 3 and the external lifting ear. The square cylinder 1 is evenly provided with a plurality of positioning holes 11, and each of the mushroom head screws 4 is fixed on the positioning hole 11 by a fixing nut 5, and the mushroom head of each of the mushroom head screws 4 is located in the square cylinder 1. It is worth noting that according to the requirements of continuous steel casting, the square cylinder 1 used in the crystallizer must be provided with an arc.

[0036] The square cylinder 1 of this embodiment is usually made of stainless steel plates with a wall thickness of 18mm to 22mm. After cold extrusion, the stainless steel plates are pressed into a groove shape and arc pressed, and finally welded into a square cylinder 1. The thickness of the final square cylinder 1 is in the range of 16mm to 20mm. Compared with the old inner water jacket, the cylinder wall thickness of the old inner water jacket is relatively thin, so it is easy to deform, and it is difficult to ensure its own dimensional accuracy and shape and position tolerance accuracy, and the anti-deformation ability is poor. The square cylinder 1 of this embodiment has a thicker wall, and see Figure 1, there is a grid-like structure on the square cylinder 1, which has enhanced rigidity and is not easy to deform, and its anti-deformation ability is greatly enhanced. The square cylinder of the old-style inner water jacket requires mold processing. The production cycle of the mold itself is long and the production cost is high. In addition, a set of special molds must be manufactured for each specification of the old-style inner water jacket to process the square cylinder. This embodiment uses a CNC machine tool to perform CNC processing on the inner cavity of the square cylinder 1, which can well ensure its manufacturing accuracy and shape and position tolerance accuracy, shorten the manufacturing cycle of the square cylinder 1, and improve the production efficiency of the square cylinder 1. The flange 2 is made of stainless steel, which does not rust. Compared with the old-style inner water jacket, the middle flange of the old-style inner water jacket is made of carbon steel, which will rust and produce rust residue that falls into the water chamber in the crystallizer. The flange of this embodiment makes the water chamber and the water seam free of rust residue.

[0037] In the assembly of the fine-machined inner water jacket of this embodiment, the square cylinder 1, flange 2 and support plate 3 are welded together to achieve a fixed connection, and then the mushroom head screw 4 is manually screwed into the positioning hole 11 from the inside of the square cylinder 1, and the mushroom head screw 4 is screwed to the bottom, and the person does not need to repeatedly adjust the position of the mushroom head screw 4. After the multiple mushroom head screws 4 are installed, the mushroom heads of the multiple mushroom head screws 4 form an area for fixing the copper tube of the crystallizer. When the fine-machined inner water jacket is in use, the copper tube of the crystallizer penetrates into the inner cavity of the square cylinder and is stuck between the mushroom heads of the multiple mushroom head screws 4. The multiple mushroom heads fix the copper tube (the mushroom heads are in contact with the outer wall of the copper tube). Because the mushroom heads have a certain thickness, there is a gap between the inner wall of the square cylinder 1 and the copper tube at this time, and the gap becomes a water gap. The mushroom head screw 4 thus realizes the automatic positioning of the water gap, and the water gap is automatically and evenly adjusted in place, without the need for manual adjustment.

[0038] In the fine-machined inner water jacket of this embodiment, mushroom head screws 4 are first used to replace the hexagonal screws. After the mushroom head screws 4 are installed in the positioning holes 11, people do not need to repeatedly adjust their positions. The positions of the mushroom head screws 4 are fixed, thereby realizing automatic positioning of the water gap, and the mushroom head screws 4 have high installation efficiency and high installation accuracy. Secondly, the support plate 3 is designed, and the hoisting opening 31 on the support plate 3 realizes the overall installation and hoisting of the fine-machined inner water jacket.

[0039] As an implementation method, each of the mushroom head screws 4 includes an integrally formed mushroom head and a screw rod, the mushroom head is hemispherical, the screw rod is fixed on the positioning hole 11, and the positioning hole 11 and the screw rod are respectively provided with threads so that the two can be fixedly connected. Since the mushroom head is hemispherical, the contact between the mushroom head and the outer wall of the copper tube is point contact, and the point contact between the two prevents the mushroom head from scratching the outer wall of the copper tube. Generally, the number of mushroom head screws 4 is set between 10 and 50; specifically, the number of mushroom head screws 4 is selected according to the size of the finely machined inner water jacket. In this embodiment, there are 36 mushroom head screws 4, so the mushroom head is in 36 point contact with the outer wall of the copper tube. The thickness of the mushroom head in this embodiment is designed to be 3.8 mm.

[0040] As an implementable embodiment, the support plate 3 is a trapezoidal support plate 3, the top of the support plate 3 is higher than the top of the square cylinder 1 and is fixedly connected thereto, in this embodiment, the portion of the top of the support plate 3 higher than the top of the square cylinder 1 is set to 20 mm, and the bottom of the support plate 3 is fixedly connected to the upper surface of the flange 2. Specifically, the support plate 3, the square cylinder 1 and the flange 2 can be welded together to achieve fixed connection.

[0041] As an implementation method, the square cylinder 1 includes two fixedly connected U-shaped water jackets, the flange 2 and the support plate 3 are arranged at the ends of the two U-shaped water jackets, and a plurality of the positioning holes 11 are evenly arranged on the two U-shaped water jackets. The two U-shaped water jackets are pressed into grooves and arcs, and the CNC machine tool then performs CNC processing on the two U-shaped water jackets. Finally, the two U-shaped water jackets are respectively welded together. After CNC processing, the U-shaped water jacket, i.e., the cylinder wall thickness of the square cylinder 1, is 16 mm.

[0042] As an implementation method, the two side walls of the two U-shaped water jackets are abutted and fixedly connected, and the two side walls of the two U-shaped water jackets are provided with ribs 12 located outside the U-shaped water jackets, and the ribs 12 on the two U-shaped water jackets are fixedly connected. Specifically, the two U-shaped water jackets are pressed into grooves and arcs, and are welded to each other with the ribs 12 to finally form a square cylinder 1, and the square cylinder 1 is then welded to the middle flange 2 to form a finely processed inner water jacket.

[0043] Furthermore, a notch is provided on the flange 2 and part of the rib plate 12 is located in the notch. The flange 2 avoids the rib plate 12, making the overall structure more streamlined.

[0044] As an implementation method, the rib plate 12 is in the shape of an elongated strip, wherein the elongated strip of the rib plate 12 is the same length as that of the U-shaped water jacket, and a plurality of fastening holes are provided on the rib plate 12, and the fastening holes on the two rib plates 12 are fixedly connected by fastening bolts 13 and fastening nuts 14, and washers 19 are provided between each of the fastening bolts 13 and the rib plate 12. The fastening bolts 13 and fastening nuts 14 realize the fixed connection of the rib plates 12 on the two U-shaped water jackets, and the washers 19 prevent the fastening bolts 13 from slipping. Furthermore, a plurality of pin holes are provided on the rib plate 12, and the pin holes and the fastening holes are arranged at intervals, and the pin holes on the two rib plates 12 are fixedly connected by pins 15. The pins 15 further enable the rib plates 12 on the two U-shaped water jackets to be stably connected and accurately positioned.

[0045] As an implementation method, a plurality of reinforcing ribs 16 are provided on the outer surface of the two U-shaped water jackets, and the plurality of reinforcing ribs 16 are located on the side of the flange 2 opposite to the support plate 3. The reinforcement ribs 16 are provided to further enhance the structural strength of the two U-shaped water jackets. Specifically, the grid-like structure on the square cylinder 1 is composed of the rib plate 12 and the reinforcement ribs 16. After the rib plate 12 and the reinforcement ribs 16 are provided, the rigidity of the square cylinder 1 is enhanced and it is not easy to deform, and the anti-deformation ability of the square cylinder 1 is greatly enhanced.

[0046] As an implementation method, both of the two U-shaped water jackets have curvatures to meet the requirements of continuous steel casting; both of the two U-shaped water jackets are provided with a first slot 17 at one end of the support plate 3, and both of the other ends of the two U-shaped water jackets are provided with a second slot 18. After the wall thickness of the square cylinder 1 is thickened, the first slots 17 are opened on the top of the two U-shaped water jackets. The two first slots 17 correspond to external devices (such as a radiation source and a receiver). The setting of the first slots 17 enables the external device to detect the liquid level of the molten steel in the copper tube in the square cylinder 1. The second slot 18 is opened, which is conducive to increasing the cooling water flow through the water gap, thereby enhancing the cooling effect.

[0047] As an implementable embodiment, the support plates 3 are provided in plurality, and the plurality of support plates 3 are circumferentially arranged along the outer wall of the square cylinder 1. The number of support plates 3 is not limited. When there is one support plate 3, the structure of the support plate 3 can meet the requirements of installation and lifting of the entire inner water jacket for fine machining. When there are multiple support plates 3, the multiple support plates 3 work together to meet the requirements of installation and lifting of the entire inner water jacket for fine machining. It should be noted that as long as the structure of the support plate 3 can achieve the installation and lifting of the entire inner water jacket for fine machining, it is within the protection scope of this solution.

[0048] As an implementation method, the flange 2 includes two semicircular rings that are fixedly connected, and the two semicircular rings are arranged on the square cylinder 1. The circular ring flange is cut by gas cutting of steel plate, and then cut into two semicircular rings after turning and milling. The two semicircular rings are then welded with the square cylinder 1 to form a finely machined inner water jacket (the two semicircular rings are welded to one end of the two U-shaped water jackets close to the support plate 3). The finely machined inner water jacket after welding is processed for inner cavity size on a CNC machine tool.

[0049] As an implementation method, a sealing cylinder 21 is provided on one of the semicircular rings. When the fine-machined inner water jacket is installed in the crystallizer for use, the flange 2 fixes the fine-machined inner water jacket in the crystallizer, and the radiation source used in the crystallizer is located in the sealing cylinder 21, which accommodates the radiation source, making the overall structure of the fine-machined inner water jacket more streamlined.

[0050] The heat dissipation process of the copper tube of the crystallizer by the finely processed inner water jacket: the copper tube of the crystallizer penetrates into the inner cavity of the square cylinder 1 and is stuck between the mushroom heads of multiple mushroom head screws 4. The molten metal steel (1500℃ liquid steel) is injected from the upper mouth of the copper tube of the crystallizer. Because the mushroom heads of the mushroom head screws 4 have a certain thickness, there is a gap between the inner wall of the square cylinder 1 and the copper tube at this time, and the gap becomes a water gap. The cooling water enters from the bottom of the square cylinder 1 and the water window under water pressure and flows out from the water gap evenly, taking away the heat on the copper tube, and finally flows out from the top of the square cylinder 1; the cooling water flows continuously and at high speed in the water gap, so as to achieve the purpose of uniformly cooling the molten metal steel in the copper tube. The molten metal steel is cooled and solidified into a square solid steel billet, and finally pulled out continuously from the lower mouth of the copper tube of the crystallizer.

[0051] The embodiments described above are only preferred embodiments of the present invention and are only used to explain the present invention, not to limit the scope of implementation of the present invention. For those skilled in the art, other implementation methods can certainly be easily made by replacement or modification based on the technical contents disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A finely machined inner water jacket for a crystallizer, comprising a square cylinder (1) and a flange (2) arranged on the square cylinder (1), characterized in that: The finely machined inner water jacket further comprises a support plate (3) and a plurality of mushroom head screws (4); the support plate (3) is arranged at the end of the square cylinder (1) and located on one side of the flange (2); a lifting opening (31) is provided on the support plate (3); a plurality of positioning holes (11) are evenly provided on the square cylinder (1); each of the mushroom head screws (4) is fixed on the positioning hole (11), and the mushroom head of each of the mushroom head screws (4) is located inside the square cylinder (1).

2. The finely machined inner water jacket according to claim 1, characterized in that: Each of the mushroom head screws (4) comprises an integrally formed mushroom head and a screw rod, the mushroom head is hemispherical, and the screw rod is fixed on the positioning hole (11).

3. The finely machined inner water jacket according to claim 1, characterized in that: The square cylinder (1) comprises two fixedly connected U-shaped water jackets, the flange (2) and the support plate (3) are arranged at the ends of the two U-shaped water jackets, and a plurality of positioning holes (11) are evenly arranged on the two U-shaped water jackets.

4. The finely machined inner water jacket according to claim 3, characterized in that: The two side walls of the two U-shaped water jackets are abutted against each other and fixedly connected, and rib plates (12) located outside the U-shaped water jackets are arranged on the two side walls of the two U-shaped water jackets, and the rib plates (12) on the two U-shaped water jackets are fixedly connected.

5. The finely machined inner water jacket according to claim 4, characterized in that: The rib plate (12) is in the shape of an elongated strip and is provided with a plurality of fastening holes. The fastening holes on two rib plates (12) are fixedly connected by fastening bolts (13) and fastening nuts (14). A washer (19) is provided between each fastening bolt (13) and the rib plate (12).

6. The finely machined inner water jacket according to claim 5, characterized in that: The rib plate (12) is provided with a plurality of pin holes, and the pin holes and the fastening holes are arranged at intervals, and the pin holes on the two rib plates (12) are fixedly connected by a pin (15).

7. The finely machined inner water jacket according to claim 3, characterized in that: A plurality of reinforcing ribs (16) are provided on the outer surfaces of the two U-shaped water jackets, and the plurality of reinforcing ribs (16) are located on the side of the flange (2) opposite to the support plate (3).

8. The finely machined inner water jacket according to claim 3, characterized in that: The two U-shaped water jackets both have an arc; one end of the two U-shaped water jackets provided with the support plate (3) is provided with a first slot (17), and the other end of the two U-shaped water jackets is provided with a second slot (18).

9. The finely machined inner water jacket according to claim 1, characterized in that: A plurality of the support plates (3) are provided, and the plurality of the support plates (3) are arranged in a circumferential direction along the outer wall of the square cylinder (1).

10. The finely machined inner water jacket according to claim 1, characterized in that: The flange (2) comprises two semicircular rings that are fixedly connected, and the two semicircular rings are arranged on the square cylinder (1).

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