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

Abstract

The invention 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] The invention relates to the field of hot rolling processing, and in particular to a segmented flange connection device of a balancing cylinder of a working roll of a rolling mill. Background Art

[0002] Hot rolling is relative to cold rolling. Cold rolling is rolling carried out below the recrystallization temperature, while hot rolling is rolling carried out above the crystallization temperature. A piece of steel billet is rolled several times after heating, and then trimmed and corrected into a steel plate. This is called hot rolling, which can significantly reduce energy consumption and reduce 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] The rolling mill generates a large amount of harmful factors such as water vapor, high temperature, vibration, iron sheet, etc. during the rolling process, which have great damage to the normal operation of hydraulic pipe fittings and their fastening bolts. The high-pressure hose flange connecting the working roll balance cylinder of the rolling mill is often deformed, causing oil injection accidents. A thicker and harder iron oxide layer 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. It is very difficult to remove the flange bolts when dealing with oil leakage of the hose flange or replacing the hose, which seriously affects the time for dealing with oil leakage of the equipment and replacing the hose. In order to prevent similar accidents from happening, its structure is improved, and a segmented flange connection device for the working roll balance cylinder of the rolling mill is proposed. Summary of the invention

[0004] The purpose of the present invention is to address the problem that, under the current long-term use condition, a thick and relatively hard iron oxide layer will remain on the side of the rolling mill, causing the bolt holes of the high-pressure hose flange connecting the rolling mill working roll balance cylinder to be blocked, making it very difficult to remove the flange bolts when dealing with oil leakage of the hose flange or replacing the hose.

[0005] In order to achieve the above-mentioned purpose of the invention, the present invention provides a segmented flange connection device of a balancing cylinder of a rolling mill working roll to improve the above-mentioned problem.

[0006] The specific application is as follows:

[0007] A segmented flange connection device for a rolling mill working roll balancing cylinder comprises a flange short joint, one side of the flange short joint is sleeved with a split flange, the split flange comprises an upper split flange portion and a lower split flange portion, the side of the split flange away from the flange short joint is connected to the rolling mill balancing cylinder, high-strength bolts are penetrated and connected to the surface of the split flange, and one side of the high-strength bolts is connected to a protective cap.

[0008] As a preferred technical solution of the present application, a 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 welding flexible joint.

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

[0010] As a preferred technical solution of the present application, a semicircular groove is provided on one side of the upper and lower flange parts, one side of the flange head extends to the inner cavity of the semicircular groove, and one side of the sealing ring extends to the outside of the annular groove and contacts the inner wall of the semicircular groove.

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

[0012] As a preferred technical solution of the present application, a hexagonal groove is provided on the surface of the nut of the high-strength bolt, and an insert is connected to one side of the protective sleeve cap.

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

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

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

[0016] As a preferred technical solution of the present application, second sealing gaskets are connected to opposite sides of the upper and lower flange parts, and the upper and lower second sealing gaskets are in contact with each other.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the scheme of this application:

[0019] 1. In order to solve the problem that in the state of long-term use of the prior art, a thick and relatively hard iron oxide layer will remain on the side of the rolling mill, causing the bolt hole of the high-pressure hose flange connecting the balance cylinder of the rolling mill work roll to be blocked, and the flange bolt is very difficult to remove when dealing with oil leakage of the hose flange or replacing the hose, the present application greatly reduces the occurrence of flange oil leakage accidents, reduces the time for disassembling flanges and hoses, improves work efficiency, and can avoid the clogging of flange bolts due to the thick and hard oxide layer remaining on the side of the rolling mill, thereby improving production efficiency, reducing spare parts loss, and improving the efficiency of replacing hoses. Strengthen the impact and vibration resistance of flange bolts and flanges during rolling, thereby greatly superior to the smooth operation of the hydraulic cylinder, convenient maintenance, reduced accidents, saved a lot of energy and costs, met on-site production needs, and can also be applied to the rolling mill balance control connection system of other industries;

[0020] 2. By setting flange short joints, split flanges, upper split flange parts, lower split flange parts, rolling mill balance cylinders, high-strength bolts and protective caps, flange deformation and clogging due to thick and hard oxide layer remaining on the side of the rolling mill can be avoided, which is convenient for replacement and disassembly, and prevents extended disassembly time in the event of oil leakage accidents. It can be replaced quickly, which improves the efficiency of replacing hoses and strengthens the impact and vibration resistance of flange bolts and flanges during rolling, thereby achieving the greatest advantage of smooth operation of hydraulic cylinders, convenient maintenance, reduced accidents, saved a lot of energy and costs, and met on-site production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The overall structural schematic diagram of the segmented flange connection device of the rolling mill working roll balancing cylinder provided in this application;

[0022] Figure 2 A schematic cross-sectional structure diagram of a circular ring groove and a sealing ring of a segmented flange connection device for a rolling mill work roll balancing cylinder provided in the present application;

[0023] Figure 3 A schematic cross-sectional view of a nut and a first sealing gasket of a segmented flange connection device for a balancing cylinder of a working roll of a rolling mill provided in the present application;

[0024] Figure 4 A schematic structural side view of the upper and lower flange parts of the segmented flange connection device for the balancing cylinder of a rolling mill work roll provided in the present application;

[0025] Figure 5 This is a schematic diagram of the cross-sectional structure of the insert block and grease layer of the segmented flange connection device of the rolling mill working roll balancing cylinder provided in this application.

[0026] Indicated in the figure:

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

[0028] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] As described in the background technology, after long-term use, a thick and relatively hard iron oxide layer will remain on the side of the rolling mill, causing the bolt holes of the high-pressure hose flange connecting the rolling mill working roll balance cylinder to be blocked, making it very difficult to remove the flange bolts when dealing with hose flange oil leakage or replacing the hose.

[0030] In order to solve this technical problem, the present invention provides a segmented flange connection device for a balancing cylinder of a rolling mill working roll, which is applied to the field of hot rolling processing.

[0031] Specifically, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A segmented flange connection device for a rolling mill working roll balancing cylinder comprises a flange short joint 1, one side of the flange short joint 1 is sleeved with a split flange 2, the split flange 2 comprises an upper split flange portion 20 and a lower split flange portion 21, a side of the split flange 2 away from the flange short joint 1 is connected to a rolling mill balancing cylinder 5, a high-strength bolt 6 is penetrated and connected to the surface of the split flange 2, and a protective sleeve cap 7 is connected to one side of the high-strength bolt 6.

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

[0033] A semicircular groove 13 is formed on one side of the upper flange portion 20 and the lower flange portion 21 . One side of the flange head 10 extends to the inner cavity of the semicircular groove 13 . One side of the sealing ring 12 extends to the outside of the annular groove 11 and contacts the inner wall of the semicircular groove 13 .

[0034] The present application avoids flange deformation and clogging due to a thick and hard oxide layer remaining on the side of the rolling mill by arranging 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 sleeve cap 7, so as to facilitate replacement and disassembly, prevent prolonged disassembly time in the event of an oil leakage accident, and enable quick replacement, thereby improving the efficiency of replacing the hose and enhancing the impact and vibration resistance of the flange bolts and flange during rolling, thereby achieving the greatest advantage of smooth operation of the hydraulic cylinder, convenient maintenance, reduced accidents, saving a large amount of energy and cost, and meeting on-site production needs.

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

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[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 working roll balancing cylinder comprises a flange short joint 1, one side of the flange short joint 1 is sleeved with a split flange 2, the split flange 2 comprises an upper split flange portion 20 and a lower split flange portion 21, a side of the split flange 2 away from the flange short joint 1 is connected to a rolling mill balancing cylinder 5, a high-strength bolt 6 is penetrated and connected to the surface of the split flange 2, and a protective sleeve cap 7 is connected to one side of the high-strength bolt 6.

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

[0040] By arranging the flange short joint 1, the split flange 2, the upper split flange part 20, the lower split flange part 21, the rolling mill balance cylinder 5, the high-strength bolts 6 and the protective sleeve cap 7, the flange deformation and the blockage due to the thick and hard oxide layer remaining on the side of the rolling mill can be avoided, the replacement and disassembly are convenient, and the disassembly time is not prolonged in the event of an oil leakage accident. The replacement can be done quickly, the efficiency of replacing the hose is improved, and the impact and vibration resistance of the flange bolts and the flange during rolling is enhanced, thereby achieving the greatest advantage of the smooth operation of the hydraulic cylinder, convenient maintenance, reduced accidents, saving a lot of energy and costs, and meeting the on-site production needs.

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

[0042] By arranging the high-pressure rubber hose 8, the original one-side flange connection and one-side slipknot connection are changed to both sides being slipknot connections, thereby preventing gluing accidents from occurring during disassembly.

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

[0044] By providing the annular groove 11, it is convenient to install the sealing ring 12 in the inner cavity of the annular groove 11, thereby improving the stability of the installation of the sealing ring 12. By providing the sealing ring 12, the flange head 10 and the split flange 2 are sealed, thereby improving the sealing performance here and preventing oil leakage here.

[0045] A semicircular groove 13 is formed on one side of the upper flange portion 20 and the lower flange portion 21 . One side of the flange head 10 extends to the inner cavity of the semicircular groove 13 . One side of the sealing ring 12 extends to the outside of the annular groove 11 and contacts the inner wall of the semicircular groove 13 .

[0046] The semicircular groove 13 is provided to facilitate the clamping connection with the flange head 10, so as to facilitate the connection between the half flange 2 and the flange short joint 1, and the connection is firm and tight, and is not easy to leak.

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

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

[0049] A hexagonal groove 14 is formed on the surface of the nut of the high-strength bolt 6 , and an insert block 15 is connected to one side of the protective sleeve cap 7 .

[0050] The flange connection adopts M10 hexagon socket high-strength bolts 6, and the protective sleeve cap 7 is made of plastic material. The interior of the protective sleeve cap 7 is designed with a hexagonal sleeve to match the hexagonal groove 14.

[0051] Embodiment 2 further optimizes Embodiment 1, specifically, as Figure 3 and Figure 5 As shown, one side of the insert block 15 extends to the inner cavity of the hexagonal groove 14 , and a grease layer 16 is disposed inside the hexagonal groove 14 .

[0052] Lubricating grease is added inside the hexagonal groove 14 to prevent clogging, facilitate replacement, and prevent the protective cap 7 from gluing to the high-strength bolt 6 and making it difficult to disassemble.

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

[0054] By providing the connecting pipe 17, the two sides of the high-pressure hose 8 are reinforced and connected, thereby improving the stability of the two sides of the high-pressure hose 8. By providing the nut 18, the connection between the high-pressure hose 8 and external components is facilitated.

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

[0056] By arranging the insert 3 to cooperate with the nut 18, it is convenient to electrically connect the high-pressure hose 8 and the flange short joint 1, and at the same time, it is convenient to disassemble them, and it is convenient to replace and maintain them. By arranging the first sealing gasket 19, the inner wall of the nut 18 and the insert 3 are sealed, which improves the sealing performance here and avoids oil leakage here.

[0057] The second sealing gaskets 4 are connected to the opposite sides of the upper half flange portion 20 and the lower half flange portion 21 , and the upper and lower second sealing gaskets 4 are in contact with each other.

[0058] By providing the second sealing gasket 4, the upper flange portion 20 and the lower flange portion 21 are sealed, and the sealing performance is good, thereby preventing oil leakage there.

[0059] During disassembly, the protective sleeve cap 7 is separated from the high-strength bolt 6, and the disassembly tool is engaged with the hexagonal groove 14, and the high-strength bolt 6 is rotated to disassemble it, and then the upper flange part 20 and the lower flange part 21 are disassembled, and the rotating nut 18 is threadedly connected with the insert pipe 3 to separate the nut 18 from the insert pipe 3 for disassembly.

[0060] In hot rolling enterprises, a large amount of iron sheets will be produced during rolling. When the roller cooling water is flushed, a thicker and harder iron oxide layer will remain on the side of the rolling mill, blocking the flange bolt hole. To prevent blockage, a protective device is composed of a protective cap 7, a high-strength bolt 6, and a grease layer 16. Grease is applied to the hexagonal groove 14, and then the protective cap 7 is pressed into the hexagonal groove 14. When removing the bolt, the protective cap 7 is taken out first, and the bolt can be removed with an Allen wrench. This method can prevent the iron sheet from clogging the bolt hole, and can also prevent the protective cap 7 and the high-strength bolt 6 from being glued together for a long time without being removed, making it difficult to remove and affecting disassembly. It can also avoid the corrosion of the high-strength bolt 6 under high-temperature water vapor, which is convenient for the disassembly of the high-strength bolt 6.

[0061] The purpose is to ensure that the flange does not deform under impact and vibration without changing the bolt hole distance of the balance cylinder, thereby avoiding oil leakage accidents. At the same time, the bolt holes are protected to avoid blockage and corrosion, which greatly improves the disassembly time and reduces the labor intensity of workers, achieving the purpose of safety and reliability.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A segmented flange connection device for a rolling mill working roll balancing cylinder, characterized in that: The invention comprises a flange short joint (1), one side of the flange short joint (1) is sleeved with a split flange (2), the split flange (2) comprises an upper split flange portion (20) and a lower split flange portion (21), the side of the split flange (2) away from the flange short joint (1) is connected to a rolling mill balance cylinder (5), a high-strength bolt (6) is penetrated and connected to the surface of the split flange (2), and one side of the high-strength bolt (6) is connected to a protective sleeve cap (7).

2. A segmented flange connection device for a rolling mill working roll balancing cylinder 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 one side of the high-pressure hose (8) is connected to a welding joint (9).

3. A segmented flange connection device for a rolling mill working roll balancing cylinder according to claim 2, characterized in that: A 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 on the inner wall of the circular groove (11).

4. A segmented flange connection device for a rolling mill working roll balancing cylinder according to claim 3, characterized in that: A semicircular groove (13) is provided on one side of the upper flange portion (20) and the lower flange portion (21); one side of the flange head (10) extends to the inner cavity of the semicircular 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 semicircular groove (13).

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

6. A segmented flange connection device for a rolling mill working roll balancing cylinder according to claim 5, characterized in that: A hexagonal groove (14) is provided on the surface of the nut of the high-strength bolt (6), and an insert block (15) is connected to one side of the protective sleeve cap (7).

7. The segmented flange connection device for the balancing cylinder of a rolling mill work roll according to claim 6, characterized in that: One side of the plug block (15) extends to the inner cavity of the hexagonal groove (14), and a lubricating grease layer (16) is provided inside the hexagonal groove (14).

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

9. A segmented flange connection device for a rolling mill work roll balancing 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 plug (3); one side of the plug (3) extends to the inner cavity of the nut (18); the surface of the plug (3) is threadedly connected to the inner wall of the nut (18); the plug (3) is located on one side of the inner cavity of the nut (18) and contacts the first sealing gasket (19).

10. The segmented flange connection device for the balancing cylinder of a rolling mill work roll according to claim 9, characterized in that: The second sealing gaskets (4) are connected to the opposite sides of the upper half flange part (20) and the lower half flange part (21), and the upper and lower second sealing gaskets (4) are in contact with each other.

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