Segmented flange connecting device for balance cylinder of working roll of rolling mill

Abstract

The utility model relates to the field of hot rolling machining, in particular to a rolling mill working roll balance cylinder sectional type flange connecting device which comprises a flange short connector, one side of the flange short connector is sleeved with a halving flange, and the halving flange comprises an upper halving flange part and a lower halving flange part; the side, away from the flange short connector, of the halving flange is connected with a rolling mill balance cylinder. Flange oil leakage accidents are greatly reduced, the time for disassembling the flange and the rubber pipe is shortened, working efficiency is improved, flange bolts can be prevented from being blocked by thick and hard oxide layers left on the side face of a rolling mill, production efficiency is improved, spare part loss is reduced, and production cost is reduced. The rubber tube replacement efficiency is improved, and the impact resistance and vibration resistance of the flange bolt and the flange during rolling are enhanced, so that the hydraulic cylinder has the advantages that the operation is stable, the maintenance is convenient, accidents are reduced, a large amount of energy and cost are saved, the field production requirement is met, and the hydraulic cylinder is also applicable to rolling mill balance control connection systems in other industries.

Description

Technical Field

[0001] This utility model relates to the field of hot rolling processing, and more specifically, to a segmented flange connection device for the balance cylinder of a rolling mill work roll. Background Technology

[0002] Hot rolling is the opposite of cold rolling. Cold rolling is rolling performed below the recrystallization temperature, while hot rolling is rolling performed above the recrystallization temperature. A steel billet is heated and then rolled several times, then trimmed and straightened to become a steel plate. This is called hot rolling. It can significantly reduce energy consumption and costs. During hot rolling, the metal has high plasticity and low deformation resistance, which greatly reduces the energy consumption of metal deformation. Hot rolling can improve the processing performance of metals and alloys.

[0003] During the rolling process, the rolling mill generates a large amount of harmful factors such as water vapor, high temperature, vibration, and iron scale, which significantly damage the normal operation of hydraulic pipes and their fastening bolts. This often causes deformation of the high-pressure hose flange of the work roll balance cylinder connected to the rolling mill, resulting in oil spraying accidents. A thick and hard layer of iron oxide scale remains on the side of the rolling mill, clogging the bolt holes of the high-pressure hose flange connected to the work roll balance cylinder. This makes it very difficult to disassemble the flange bolts when dealing with oil leaks or replacing hoses, seriously affecting the time required to handle equipment oil leaks and replace hoses. To prevent similar accidents from occurring, the structure is improved by proposing a segmented flange connection device for the work roll balance cylinder of the rolling mill. Utility Model Content

[0004] The purpose of this invention is to address the problem that, under long-term use, a thick and hard layer of iron oxide scale remains on the side of the rolling mill, which clogs the bolt holes of the high-pressure hose flange connecting to the rolling mill work roll balance cylinder, making it very difficult to disassemble the flange bolts when dealing with oil leaks or replacing the hose.

[0005] In order to achieve the above-mentioned objectives, this utility model provides a segmented flange connection device for the balance cylinder of a rolling mill work roll, so as to improve the above-mentioned problems.

[0006] The application is as follows:

[0007] A segmented flange connection device for a rolling mill work roll balance cylinder includes a flange short joint, a split flange sleeved on one side of the flange short joint, the split flange including an upper split flange part and a lower split flange part, a rolling mill balance cylinder connected to the side of the split flange away from the flange short joint, a high-strength bolt penetrating the surface of the split flange, and a protective cap connected to one side of the high-strength bolt.

[0008] As a preferred technical solution of this application, the side of the flange short joint away from the split flange is connected to a high-pressure hose, and one side of the high-pressure hose is connected to a welded union.

[0009] As a preferred technical solution of this application, the flange short joint has an integrally formed flange head on the left side, and an annular groove is formed on one side of the flange head, with a sealing ring embedded in the inner wall of the annular groove.

[0010] As a preferred technical solution of this application, a semi-circular groove is provided on one side of both the upper split flange and the lower split flange. One side of the flange head extends into the inner cavity of the semi-circular groove, and one side of the sealing ring extends to the outside of the annular groove and contacts the inner wall of the semi-circular groove.

[0011] As a preferred technical solution of this application, the left side of the high-strength bolt penetrates the split flange and extends to the inner wall of the mill balance cylinder, and the surface of the high-strength bolt is threadedly connected to the inner wall of the mill balance cylinder.

[0012] As a preferred technical solution of this application, the nut surface of the high-strength bolt is provided with a hexagonal groove, and a plug is connected to one side of the protective cap.

[0013] As a preferred technical solution of this application, one side of the insert extends into the inner cavity of the hexagonal groove, and a grease layer is provided inside the hexagonal groove.

[0014] As a preferred technical solution of this application, the high-pressure hose is connected to connecting pipes on both sides, and a nut is connected to one side of the connecting pipe.

[0015] As a preferred technical solution of this application, the inner wall of the nut is provided with a first sealing gasket, one side of the flange short joint is connected to a tube, one side of the tube extends into the inner cavity of the nut, the surface of the tube is threadedly connected to the inner wall of the nut, and the tube is located on one side of the inner cavity of the nut and contacts the first sealing gasket.

[0016] As a preferred technical solution of this application, a second sealing gasket is connected to the opposite side of the upper split flange and the lower split flange, and the two second sealing gaskets are in contact with each other.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] In the scheme of this application:

[0019] 1. To address the problem in existing technologies where a thick and hard layer of iron oxide scale accumulates on the sides of the rolling mill during long-term use, clogging the bolt holes of the high-pressure hose flange connecting the rolling mill work roll balance cylinder and making flange bolt disassembly extremely difficult when dealing with hose flange oil leaks or replacing hoses, this application significantly reduces the occurrence of flange oil leaks, reduces the time spent disassembling flanges and hoses, improves work efficiency, avoids flange bolt clogging due to a thick and hard oxide layer remaining on the sides of the rolling mill, increases production efficiency, reduces spare parts wear, improves hose replacement efficiency, and strengthens the impact and vibration resistance of flange bolts and flanges during rolling, thereby maximizing the advantages of smooth hydraulic cylinder operation, convenient maintenance, reduced accidents, and significant energy and cost savings, meeting on-site production needs, and can also be applied to rolling mill balance control connection systems in other industries;

[0020] 2. By setting up flange short joints, split flanges, upper split flange sections, lower split flange sections, rolling mill balance cylinders, high-strength bolts, and protective caps, flange deformation and blockage caused by thick and hard oxide layers remaining on the sides of the rolling mill are avoided. This facilitates replacement and disassembly, prevents prolonged disassembly time in case of oil leakage accidents, and allows for rapid replacement, improving the efficiency of hose replacement. It also strengthens the flange bolts and flanges' resistance to impact and vibration during rolling, thereby maximizing the smooth operation of the hydraulic cylinder, facilitating maintenance, reducing accidents, saving a significant amount of energy and costs, and meeting the needs of on-site production. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of the segmented flange connection device for the rolling mill work roll balance cylinder provided in this application;

[0022] Figure 2 A cross-sectional structural schematic diagram of the annular groove and sealing ring of the segmented flange connection device for the rolling mill work roll balance cylinder provided in this application;

[0023] Figure 3 A cross-sectional schematic diagram of the nut and the first sealing gasket of the segmented flange connection device for the rolling mill work roll balance cylinder provided in this application;

[0024] Figure 4 This is a side view of the upper and lower split flange sections of the segmented flange connection device for the mill work roll balance cylinder provided in this application.

[0025] Figure 5 A cross-sectional structural diagram of the insert block and grease layer of the segmented flange connection device for the working roll balance cylinder of the rolling mill provided in this application.

[0026] The image shows:

[0027] 1. Flange short joint; 2. Split flange; 20. Upper split flange section; 21. Lower split flange section; 3. Insert pipe; 4. Second gasket; 5. Rolling mill balance cylinder; 6. High-strength bolt; 7. Protective cap; 8. High-pressure hose; 9. Welded union; 10. Flange head; 11. Circular groove; 12. Sealing ring; 13. Semicircular groove; 14. Hexagonal groove; 15. Insert block; 16. Grease layer; 17. Connecting pipe; 18. Nut; 19. First gasket. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0029] As described in the background art, under long-term use, a thick and hard layer of iron oxide scale will remain on the side of the rolling mill, which will block the bolt holes of the high-pressure hose flange connecting the working roll balance cylinder of the rolling mill. When dealing with oil leakage of the hose flange or replacing the hose, it is very difficult to disassemble the flange bolts.

[0030] To solve this technical problem, this utility model provides a segmented flange connection device for the balance cylinder of a rolling mill work roll, which is applied in the field of hot rolling.

[0031] For details, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A segmented flange connection device for a rolling mill work roll balance cylinder includes a flange short joint 1, a split flange 2 is sleeved on one side of the flange short joint 1, the split flange 2 includes an upper split flange part 20 and a lower split flange part 21, a rolling mill balance cylinder 5 is connected to the side of the split flange 2 away from the flange short joint 1, a high-strength bolt 6 is connected through the surface of the split flange 2, and a protective cap 7 is connected to one side of the high-strength bolt 6.

[0032] A high-pressure hose 8 is connected to the side of the flange short joint 1 away from the split flange 2, and a welded union 9 is connected to the side of the high-pressure hose 8.

[0033] A semi-circular groove 13 is provided on one side of both the upper split flange 20 and the lower split flange 21. One side of the flange head 10 extends into the inner cavity of the semi-circular groove 13, and one side of the sealing ring 12 extends into the outside of the annular groove 11 and contacts the inner wall of the semi-circular groove 13.

[0034] This application, by setting up a flange short joint 1, a split flange 2, an upper split flange part 20, a lower split flange part 21, a rolling mill balance cylinder 5, high-strength bolts 6, and a protective cap 7, avoids flange deformation and blockage caused by a thick and hard oxide layer remaining on the side of the rolling mill. It facilitates replacement and disassembly, prevents prolonged disassembly time in case of oil leakage accidents, allows for rapid replacement, improves the efficiency of hose replacement, and enhances the impact and vibration resistance of the flange bolts and flange during rolling. This maximizes the advantages of smooth hydraulic cylinder operation, convenient maintenance, reduces accidents, saves a lot of energy and costs, and meets the needs of on-site production.

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0036] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] Example 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A segmented flange connection device for a rolling mill work roll balance cylinder includes a flange short joint 1, a split flange 2 is sleeved on one side of the flange short joint 1, the split flange 2 includes an upper split flange part 20 and a lower split flange part 21, a rolling mill balance cylinder 5 is connected to the side of the split flange 2 away from the flange short joint 1, a high-strength bolt 6 is connected through the surface of the split flange 2, and a protective cap 7 is connected to one side of the high-strength bolt 6.

[0039] By adding a segmented flange joint, the short flange joint 1 is made of 304 stainless steel to prevent corrosion and leakage. The joint length is 200-300mm, and the flange head thickness is 16-21mm. The split flange 2 is also made of 304 stainless steel, with a flange thickness of 25-30mm, a length of 80-90mm, a width of 60-70mm, and a flange groove depth of 15-20mm. The hole spacing of the flange connection remains the same as the original hole spacing.

[0040] By setting up flange short joint 1, split flange 2, upper split flange part 20, lower split flange part 21, mill balance cylinder 5, high-strength bolts 6, and protective caps 7, flange deformation and blockage caused by thick and hard oxide layers remaining on the side of the mill are avoided. This facilitates replacement and disassembly, prevents prolonged disassembly time in case of oil leakage accidents, and allows for rapid replacement, improving the efficiency of hose replacement. It also enhances the impact and vibration resistance of flange bolts and flanges during rolling, thereby maximizing the smooth operation of the hydraulic cylinder, facilitating maintenance, reducing accidents, saving a lot of energy and costs, and meeting the needs of on-site production.

[0041] A high-pressure hose 8 is connected to the side of the flange short joint 1 away from the split flange 2, and a welded union 9 is connected to the side of the high-pressure hose 8.

[0042] By installing high-pressure hose 8, the original flange connection on one side and knot connection on one side are changed to knot connection on both sides, preventing glue-related accidents during disassembly.

[0043] The flange head 10 is integrally formed on the left side of the flange short joint 1. A circular groove 11 is provided on one side of the flange head 10, and a sealing ring 12 is embedded in the inner wall of the circular groove 11.

[0044] By setting the annular groove 11, it is convenient to install the sealing ring 12 in the inner cavity of the annular groove 11, which improves the stability of the installation of the sealing ring 12. By setting the sealing ring 12, the flange head 10 and the split flange 2 are sealed, which improves the sealing performance and prevents oil leakage.

[0045] A semi-circular groove 13 is provided on one side of both the upper split flange 20 and the lower split flange 21. One side of the flange head 10 extends into the inner cavity of the semi-circular groove 13, and one side of the sealing ring 12 extends into the outside of the annular groove 11 and contacts the inner wall of the semi-circular groove 13.

[0046] By setting a semi-circular groove 13, it is easy to snap onto the flange head 10, which facilitates the connection between the split flange 2 and the flange short joint 1. The connection is firm and tight, and it is not easy to leak.

[0047] The left side of the high-strength bolt 6 penetrates the split flange 2 and extends to the inner wall of the mill balance cylinder 5. The surface of the high-strength bolt 6 is threadedly connected to the inner wall of the mill balance cylinder 5.

[0048] By setting high-strength bolts 6, the connection between the split flange 2 and the mill balance cylinder 5 is made secure and will not loosen.

[0049] The nut surface of the high-strength bolt 6 has a hexagonal groove 14, and a plug 15 is connected to one side of the protective cap 7.

[0050] The flange connection uses M10 internal hexagonal high-strength bolts 6, and the protective cap 7 is made of plastic. The protective cap 7 has a hexagonal sleeve inside, which matches the hexagonal groove 14.

[0051] Example 2 is a further optimization of Example 1, specifically, as follows: Figure 3 and Figure 5 As shown, one side of the insert 15 extends into the inner cavity of the hexagonal groove 14, and a grease layer 16 is provided inside the hexagonal groove 14.

[0052] Lubricant is added inside the hexagonal groove 14 to prevent clogging, facilitate replacement, and prevent the protective cap 7 from sticking to the high-strength bolt 6 and becoming difficult to disassemble.

[0053] Both sides of the high-pressure hose 8 are connected to connecting pipes 17, and one side of the connecting pipe 17 is connected to a nut 18.

[0054] By setting the connecting pipe 17, the two sides of the high-pressure hose 8 are reinforced and connected, which improves the stability of the two sides of the high-pressure hose 8. By setting the nut 18, it is easy to connect the high-pressure hose 8 to external components.

[0055] The inner wall of the nut 18 is provided with a first sealing gasket 19. One side of the flange short joint 1 is connected to the insertion tube 3. One side of the insertion tube 3 extends into the inner cavity of the nut 18. The surface of the insertion tube 3 is threadedly connected to the inner wall of the nut 18. The insertion tube 3 is located on one side of the inner cavity of the nut 18 and contacts the first sealing gasket 19.

[0056] By setting the insertion tube 3 to cooperate with the nut 18, it is convenient to connect the high-pressure hose 8 and the flange short connector 1, and at the same time, it is convenient to disassemble them, making it easy to replace and maintain them. By setting the first sealing gasket 19, the inner wall of the nut 18 and the insertion tube 3 are sealed, which improves the sealing performance and prevents oil leakage.

[0057] The upper split flange 20 and the lower split flange 21 are each connected to a second sealing gasket 4 on their opposite sides, and the two second sealing gaskets 4 are in contact with each other.

[0058] By setting a second sealing gasket 4, the upper split flange 20 and the lower split flange 21 are sealed, ensuring good sealing and preventing oil leakage.

[0059] During disassembly, the protective cap 7 is separated from the high-strength bolt 6. The disassembly tool is used to engage with the hexagonal groove 14. The high-strength bolt 6 is rotated to disassemble it. Then, the upper split flange 20 and the lower split flange 21 are disassembled. The nut 18 is rotated to connect with the threaded tube 3, so that the nut 18 is separated from the tube 3 and disassembled.

[0060] In hot rolling mills, a large amount of iron scale is generated during rolling. Under the washing of the roll cooling water, a thick and hard layer of iron oxide scale remains on the side of the mill, which can clog the flange bolt holes. To prevent clogging, a protective device consisting of a protective cap 7, a high-strength bolt 6, and a grease layer 16 is used. The grease is applied into the hexagonal groove 14, and then the protective cap 7 is pressed into the hexagonal groove 14. When disassembling the bolt, the protective cap 7 is removed first, and then the bolt can be removed with an Allen wrench. This method not only prevents the iron scale from clogging the bolt holes, but also prevents the protective cap 7 and the high-strength bolt 6 from sticking together after a long period of time, making them difficult to remove and affecting disassembly. It also avoids corrosion of the high-strength bolt 6 under high temperature and moisture conditions, making it easier to disassemble the high-strength bolt 6.

[0061] Without changing the bolt hole spacing of the balance cylinder, the flange is designed to remain undeformed under impact and vibration, thus preventing oil leakage. At the same time, the bolt holes are protected to prevent blockage and corrosion, greatly improving disassembly time, reducing labor intensity, and achieving a safe and reliable outcome.

[0062] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0063] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A segmented flange connection device for a rolling mill work roll balance cylinder, characterized in that, The device includes a flange short joint (1), on one side of which a split flange (2) is fitted. The split flange (2) includes an upper split flange part (20) and a lower split flange part (21). A rolling mill balance cylinder (5) is connected to the side of the split flange (2) away from the flange short joint (1). A high-strength bolt (6) is connected through the surface of the split flange (2). A protective cap (7) is connected to one side of the high-strength bolt (6).

2. The segmented flange connection device for the working roll balance cylinder of a rolling mill according to claim 1, characterized in that, The side of the flange short joint (1) away from the split flange (2) is connected to a high-pressure hose (8), and the side of the high-pressure hose (8) is connected to a welded union (9).

3. The segmented flange connection device for the balance cylinder of a rolling mill work roll according to claim 2, characterized in that, The flange head (10) is integrally formed on the left side of the flange short joint (1), and a circular groove (11) is provided on one side of the flange head (10), and a sealing ring (12) is embedded in the inner wall of the circular groove (11).

4. The segmented flange connection device for the balance cylinder of a rolling mill work roll according to claim 3, characterized in that, A semi-circular groove (13) is provided on one side of both the upper split flange (20) and the lower split flange (21). One side of the flange head (10) extends into the inner cavity of the semi-circular groove (13), and one side of the sealing ring (12) extends to the outside of the annular groove (11) and contacts the inner wall of the semi-circular groove (13).

5. A segmented flange connection device for a rolling mill work roll balance cylinder according to claim 4, characterized in that, The left side of the high-strength bolt (6) passes through the split flange (2) and extends to the inner wall of the mill balance cylinder (5), and the surface of the high-strength bolt (6) is threaded to the inner wall of the mill balance cylinder (5).

6. A segmented flange connection device for a rolling mill work roll balance cylinder according to claim 5, characterized in that, The nut surface of the high-strength bolt (6) is provided with a hexagonal groove (14), and a plug (15) is connected to one side of the protective cap (7).

7. A segmented flange connection device for a rolling mill work roll balance cylinder according to claim 6, characterized in that, One side of the insert (15) extends into the inner cavity of the hexagonal groove (14), and the interior of the hexagonal groove (14) is provided with a grease layer (16).

8. The segmented flange connection device for the balance cylinder of a rolling mill work roll according to claim 7, characterized in that, The high-pressure hose (8) is connected to connecting pipes (17) on both sides, and a nut (18) is connected to one side of the connecting pipe (17).

9. A segmented flange connection device for a rolling mill work roll balance cylinder according to claim 8, characterized in that, The inner wall of the nut (18) is provided with a first sealing gasket (19). One side of the flange short joint (1) is connected to a tube (3). One side of the tube (3) extends into the inner cavity of the nut (18). The surface of the tube (3) is threadedly connected to the inner wall of the nut (18). The tube (3) is located on one side of the inner cavity of the nut (18) and contacts the first sealing gasket (19).

10. A segmented flange connection device for a rolling mill work roll balance cylinder according to claim 9, characterized in that, The upper split flange (20) and the lower split flange (21) are each connected to a second sealing gasket (4) on their opposite sides, and the two second sealing gaskets (4) are in contact with each other.

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