Hot-rolled slab oxide scale removing device

By designing a hot-rolled slab iron oxide strip removal device, including a flexible side scale descaling device, the problem of the existing equipment's edge temperature drop too large and the side spray cannot be closed separately when removing the slab edge iron oxide strip, achieving efficient removal of the slab edge and extending the service life of the equipment.

CN222551694UActive Publication Date: 2025-03-04BENGANG STEEL PLATES CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202420563713.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-22
Publication Date
2025-03-04
Estimated Expiration
2034-03-22

AI Technical Summary

Technical Problem

When removing the iron oxide sheet of the slab edge, the existing hot-rolled slab descaling equipment has a fixed side spray height, which can easily lead to excessive temperature drop in the edges and corners to aggravate the side cracks, and the side spray cannot be closed separately, making it inflexible to use.

Method used

A hot-rolled slab iron oxide removal device is designed, including an upper scale descaling device, a lower scale descaling device and a side scale descaling device. The side scale descaling device is connected to the water inlet pipe of the lower scale descaling device through the side scale descaling nozzle opposite to both sides of the lower scale descaling device. The first side nozzle and the second side nozzle are provided on the nozzle. The injection flat port is provided with different angles from the horizontal direction. Combined with the side spray pressure detection and adjustment device, flexible scale descaling operation is realized through the PLC controller.

Benefits of technology

The effective removal of the iron oxide sheet on the edge of the slab is achieved, avoiding the problem of excessive corner temperature drop caused by concentrated blow of descaling water at the edge, improving the edge quality of hot-rolled products, reducing the wear of the iron oxide sheet particles on the equipment, and extending the service life of the equipment.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222551694U_ABST
    Figure CN222551694U_ABST
Patent Text Reader

Abstract

The utility model relates to a hot-rolled slab oxide scale removing device which comprises an upper descaling device, a lower descaling device and side descaling devices, the side descaling devices comprise side descaling spray pipes oppositely arranged on the two sides of the lower descaling device, the side descaling spray pipes are communicated with a water inlet pipe of the lower descaling device, the side descaling spray pipes comprise a first side spray pipe and a second side spray pipe, and the first side spray pipe is communicated with the second side spray pipe. The first side spraying pipe and the second side spraying pipe are arranged in an angular symmetry mode, the first side spraying pipe is connected with a first side nozzle, the second side spraying pipe is connected with a second side nozzle, the end face of the first side nozzle and the end face of the second side nozzle are each provided with a spraying flat opening, and an included angle ranging from 30 degrees to 35 degrees is formed between the spraying flat opening of the first side nozzle and the horizontal direction. An included angle ranging from 15 degrees to 20 degrees is formed between a jet flat opening of the second side nozzle and the horizontal direction. The side descaling device further comprises a side jet pressure detecting device and a side jet pressure adjusting device. According to the utility model, the problem that the temperature drop of the corners is too large because the edge descaling water intensively strikes the corners of the plate blank can be avoided.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to hot-rolled slab descaling equipment, in particular to a hot-rolled slab iron oxide scale removing device. Background Art

[0002] The competition in the steel industry is becoming increasingly fierce, and users have strict requirements on product quality. Therefore, only by improving the quality level of physical products can we stand out. Iron sheet defects have always been one of the factors affecting product quality, especially edge iron sheet defects.

[0003] Patent CN214869813U discloses a descaling manifold with side spray descaling and an installation structure, the descaling manifold includes a lower descaling manifold and a plurality of lower descaling nozzles arranged on the lower descaling manifold, a water inlet is arranged on the lower descaling manifold, the water inlet is connected to a high-pressure water pipe through a water inlet pipe to introduce high-pressure water into the lower descaling manifold, side spray descaling manifolds are arranged at both ends of the lower descaling manifold, the side spray descaling manifold is arranged vertically, the upper end of the side spray descaling manifold is closed, and the lower end is connected to the lower descaling manifold, so that the high-pressure water in the lower descaling manifold enters the side spray descaling manifold, and a plurality of side spray descaling nozzles are arranged on the side spray descaling manifold, all of which are evenly distributed along the longitudinal direction of the side spray descaling manifold and are inclined toward the plate to descale the side of the plate. The descaling manifold can effectively descale the side of the plate to prevent the iron oxide scale on the side of the plate from entering the subsequent process. The side spraying height of the device is fixed, and the edge of the steel plate is completely sprayed, which easily leads to excessive temperature drop at the corners and aggravates the edge cracking. The side spraying of the device cannot be closed separately, and its use is not flexible enough. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a device for removing iron oxide scale from hot-rolled slabs, so as to solve the problem of iron oxide scale of hot-rolled products.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for removing iron oxide scale from a hot-rolled slab comprises an upper descaling device, a lower descaling device and a side descaling device. The side descaling device comprises side descaling nozzles arranged on both sides of the lower descaling device, the side descaling nozzles are connected to a water inlet pipe of the lower descaling device, the side descaling nozzles comprise a first side nozzle and a second side nozzle, the first side nozzle and the second side nozzle are symmetrically arranged at an angle, the first side nozzle is connected to a first side nozzle, the second side nozzle is connected to a second side nozzle, end faces of the first side nozzle and the second side nozzle are both provided with injection flat openings, an angle of 30°-35° is set between the injection flat opening of the first side nozzle and the horizontal direction, an angle of 15°-20° is set between the injection flat opening of the second side nozzle and the horizontal direction, and the side descaling device also comprises a side spray pressure detection device and a side spray pressure regulating device.

[0007] The side descaling nozzles on both sides are symmetrically arranged.

[0008] The side spray pressure detection device is respectively arranged on the water inlet side of the first side nozzle and the second side nozzle, and the side spray pressure regulating device is respectively arranged on the water outlet side of the first side nozzle and the second side nozzle. The side spray pressure detection device and the side spray pressure regulating device are both connected to the PLC controller.

[0009] The side spray pressure detection device is a hydraulic pressure sensor.

[0010] The side spray pressure regulating device is a pressure regulating valve.

[0011] The angle between the first side nozzle and the second side nozzle is 30°-40°.

[0012] The first side nozzle and the second side nozzle are both bent pipes.

[0013] The end faces of the first side nozzle and the second side nozzle are arranged parallel to the side faces of the hot-rolled slab.

[0014] Compared with the existing technology, the beneficial effects of the utility model are:

[0015] The utility model can remove the oxidized iron scale on the edge of the slab, which can ensure the descaling effect of the edges of slabs of different widths, and can also avoid the problem of excessive temperature drop at the corners caused by the concentrated impact of the edge descaling water on the corners of the slab. Improve the edge quality of hot-rolled products. After the oxidized iron scale on the edge of the slab is removed, the wear of the oxidized iron scale particles on the hammer head and the surface of the vertical roller of the width setting machine can be reduced, effectively improving the surface quality of the hot-rolled strip, extending the service life of the vertical roller, and reducing roller consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 for Figure 1 AA section view.

[0018] Figure 3 Schematic diagram of the first side nozzle.

[0019] Figure 4 Schematic diagram of the second side nozzle.

[0020] Figure 5 This is the control principle diagram of the side descaling device.

[0021] In the figure: an upper descaling device 1, a lower descaling device 2, a side descaling device 3, a side descaling nozzle 4, a first side nozzle 5, a second side nozzle 6, a first side nozzle 7, a second side nozzle 8, a jet flat port 9, a side spray pressure detecting device 10, and a side spray pressure regulating device 11. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means more than two.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0024] like Figure 1-Figure 5 A device for removing iron oxide scale from a hot-rolled slab comprises an upper descaling device 1, a lower descaling device 2, and a side descaling device 3. The side descaling device 3 comprises side descaling nozzles 4 symmetrically arranged on both sides of the lower descaling device 2. The side descaling nozzles 4 are connected to the water inlet pipe of the lower descaling device 2. The side descaling nozzles 4 comprise a first side nozzle 5 and a second side nozzle 6. The first side nozzle 5 and the second side nozzle 6 are arranged symmetrically at an angle. The first side nozzle 5 is connected to a first side nozzle 7, and the second side nozzle 6 is connected to a second side nozzle 8. The end faces of the first side nozzle 8 and the second side nozzle 9 are arranged parallel to the side face of the hot-rolled slab. The end faces of the first side nozzle 7 and the second side nozzle 8 are both provided with a jet flat opening 9. The jet flat opening 9 of the first side nozzle 7 is arranged at an angle of 30°-35° with the horizontal direction, and the jet flat opening 9 of the second side nozzle 8 is arranged at an angle of 15°-20° with the horizontal direction. The side descaling device 3 also comprises a side jet pressure detection device 10 and a side jet pressure adjustment device 11.

[0025] The first side nozzle 5 and the second side nozzle 6 are both bent pipes.

[0026] The side spray pressure detection device 10 is respectively arranged on the water inlet side of the first side nozzle 5 and the second side nozzle 6, and the side spray pressure regulating device 11 is respectively arranged on the water outlet side of the first side nozzle 5 and the second side nozzle 6. The side spray pressure detection device 10 and the side spray pressure regulating device 11 are both connected to the PLC controller.

[0027] The side spray pressure detection device 10 is a hydraulic pressure sensor.

[0028] The side spray pressure regulating device 11 is a pressure regulating valve.

[0029] The angle between the first side nozzle 5 and the second side nozzle 6 is 30°-40°.

[0030] When descaling the slab, the upper and lower descaling devices spray descaling water on the upper and lower surfaces of the slab, and the side descaling device sprays descaling water on the side of the slab. The spray ports of the first side nozzle 7 and the second side nozzle 8 are arranged at different angles to the horizontal direction, that is, at different angles to the side of the horizontally running slab, so as to ensure the descaling effect on the edges of slabs of different widths, and also avoid the problem of excessive temperature drop at the corners caused by the concentrated impact of the edge descaling water on the corners of the slab.

[0031] The side descaling device is provided with a side spray pressure detection device 10 and a side spray pressure regulating device 11. According to the pressure data fed back by the pressure detection device 10, the required descaling pressure is selected by adjusting the side spray pressure regulating device 11. When the slab passes through, the side descaling is sprayed at a given pressure (optional pressure is 11Mpa, 15Mpa, 20Mpa or the valve is closed), and the side descaling stops spraying after the slab passes through.

[0032] In order to make the purpose, technical scheme and technical effect of the utility model clearer, the technical scheme in the embodiment of the utility model is now described clearly and completely. However, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. In combination with the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Example 1

[0034] A device for removing iron oxide scale from a hot-rolled slab comprises an upper descaling device 1, a lower descaling device 2, and a side descaling device 3. The side descaling device 3 comprises side descaling nozzles 4 symmetrically arranged on both sides of the lower descaling device 2, the side descaling nozzles 4 are connected to the water inlet pipe of the lower descaling device 2, the side descaling nozzles 4 comprise a first side nozzle 5 and a second side nozzle 6, the first side nozzle 5 and the second side nozzle 6 are symmetrically arranged at 30 degrees, the first side nozzle 5 is connected to a first side nozzle 7, the second side nozzle 6 is connected to a second side nozzle 8, and the end faces of the first side nozzle 8 and the second side nozzle 9 are arranged parallel to the side face of the hot-rolled slab. The end faces of the first side nozzle 7 and the second side nozzle 8 are both provided with a jet flat opening 9, the jet flat opening 9 of the first side nozzle 7 is arranged at an angle of 30 degrees to the horizontal direction, and the jet flat opening 9 of the second side nozzle 8 is arranged at an angle of 15 degrees to the horizontal direction, and the side descaling device 3 further comprises a side jet pressure detection device 10 and a side jet pressure adjustment device 11.

[0035] The side spray pressure detection device 10 is respectively arranged at the water inlet side of the first side spray pipe 5 and the second side spray pipe 6, and the side spray pressure regulating device 11 is respectively arranged at the water outlet side of the first side spray pipe 5 and the second side spray pipe 6. The side spray pressure detection device 10 and the side spray pressure regulating device 11 are both connected to the PLC controller. The side spray pressure detection device 10 is a hydraulic pressure sensor. The side spray pressure regulating device 11 is a pressure regulating valve.

[0036] Example 2

[0037] A device for removing iron oxide scale from a hot-rolled slab comprises an upper descaling device 1, a lower descaling device 2, and a side descaling device 3. The side descaling device 3 comprises side descaling nozzles 4 symmetrically arranged on both sides of the lower descaling device 2, the side descaling nozzles 4 are connected to the water inlet pipe of the lower descaling device 2, the side descaling nozzles 4 comprise a first side nozzle 5 and a second side nozzle 6, the first side nozzle 5 and the second side nozzle 6 are symmetrically arranged at 34°, the first side nozzle 5 is connected to a first side nozzle 7, the second side nozzle 6 is connected to a second side nozzle 8, and the end faces of the first side nozzle 8 and the second side nozzle 9 are arranged parallel to the side face of the hot-rolled slab. The end faces of the first side nozzle 7 and the second side nozzle 8 are both provided with a jet flat opening 9, the jet flat opening 9 of the first side nozzle 7 is arranged at an angle of 32° with the horizontal direction, and the jet flat opening 9 of the second side nozzle 8 is arranged at an angle of 18° with the horizontal direction, and the side descaling device 3 further comprises a side jet pressure detection device 10 and a side jet pressure adjustment device 11.

[0038] The first side nozzle 5 and the second side nozzle 6 are both bent pipes. The side spray pressure detection device 10 is respectively arranged on the water inlet side of the first side nozzle 5 and the second side nozzle 6, and the side spray pressure regulating device 11 is respectively arranged on the water outlet side of the first side nozzle 5 and the second side nozzle 6. The side spray pressure detection device 10 and the side spray pressure regulating device 11 are both connected to the PLC controller. The side spray pressure detection device 10 is a hydraulic pressure sensor. The side spray pressure regulating device 11 is a pressure regulating valve.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and basic spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for removing iron oxide scale from hot-rolled slab, characterized in that: The utility model comprises an upper descaling device, a lower descaling device and a side descaling device. The side descaling device comprises side descaling nozzles arranged on both sides of the lower descaling device. The side descaling nozzles are connected with the water inlet pipe of the lower descaling device. The side descaling nozzles comprise a first side nozzle and a second side nozzle. The first side nozzle and the second side nozzle are arranged symmetrically at an angle. The first side nozzle is connected with a first side nozzle, and the second side nozzle is connected with a second side nozzle. The end faces of the first side nozzle and the second side nozzle are both provided with injection flat openings. The injection flat opening of the first side nozzle is provided with an angle of 30°-35° with the horizontal direction, and the injection flat opening of the second side nozzle is provided with an angle of 15°-20° with the horizontal direction. The side descaling device also comprises a side spray pressure detection device and a side spray pressure regulating device.

2. The device for removing iron oxide scale from hot-rolled slab according to claim 1, characterized in that: The side descaling nozzles on both sides are symmetrically arranged.

3. The device for removing iron oxide scale from hot-rolled slab according to claim 1, characterized in that: The side spray pressure detection device is respectively arranged on the water inlet side of the first side nozzle and the second side nozzle, and the side spray pressure regulating device is respectively arranged on the water outlet side of the first side nozzle and the second side nozzle. The side spray pressure detection device and the side spray pressure regulating device are both connected to the PLC controller.

4. The device for removing iron oxide scale from hot-rolled slab according to claim 1, characterized in that: The side spray pressure detection device is a hydraulic pressure sensor.

5. The device for removing iron oxide scale from hot-rolled slab according to claim 1, characterized in that: The side spray pressure regulating device is a pressure regulating valve.

6. The device for removing iron oxide scale from hot-rolled slab according to claim 1, characterized in that: The angle between the first side nozzle and the second side nozzle is 30°-40°.

7. The device for removing iron oxide scale from hot-rolled slab according to claim 1, characterized in that: The first side nozzle and the second side nozzle are both bent pipes.

8. The device for removing iron oxide scale from hot-rolled slab according to claim 1, characterized in that: The end faces of the first side nozzle and the second side nozzle are arranged parallel to the side faces of the hot-rolled slab.