A blowing system for reducing surface residual defects of a tinned substrate

Abstract

The present application relates to the technical field of rolling steel, and in particular to a kind of purging system for reducing residual defects on the surface of tinned substrate, comprising: device shell, the left and right side lower part of device shell is opened with strip steel pass-through, and strip steel pass-through is movably inserted with strip steel;First hydraulic cylinder, the left end of the transmission rod of first hydraulic cylinder is fixedly connected with nozzle, and the outer right side of the transmission rod of first hydraulic cylinder is movably sleeved with positioning ring, and the upper end of positioning ring is fixedly connected with second hydraulic cylinder.The overall structure of the equipment, the downward force is applied to the positioning ring by the second hydraulic cylinder, so that the left end connecting rod of the transmission rod of the first hydraulic cylinder can apply downward force, and the lower left end of the nozzle can be extruded and fitted with the upper end of the support rod, so that the position of the nozzle is further fixed, the relative position accuracy of the nozzle and the work roll is improved, that is, the position control accuracy of the nozzle in the purging system is significantly improved, and the purging effect of the leveling liquid is obviously improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel rolling technology, in particular to a blowing system for reducing residual defects on the surface of tinned base plate. BACKGROUND

[0002] The surface quality of tinned base plate is required to be high. In the wet flattening process, the flattening liquid is sprayed on the surface of the support roll and the roll gap between the work roll and the support roll, so as to effectively clean the roll surface, eliminate the dust adhered to the roll surface, remove the metal scraps or oily bonding residues remaining on the surface of the rolled strip after rolling, reduce the roll surface wear and the indentation of the rolled strip caused by the flattening process, and improve the surface quality of the finished rolled strip.

[0003] Since the flattening liquid flows down, drops, splashes and scatters from the roll surface and the roll gap, or disperses in the form of mist from the rolling mill area to the outside, and remains on the surface of the rolled strip, a blowing device is generally arranged at the outlet of the rack of the flattening mill set to blow off the remaining flattening liquid by using high-pressure air, so as to avoid the quality defects such as yellow spots caused by the foreign matters brought in by the flattening liquid and the remaining flattening liquid. Generally, in order to achieve good blowing effect, a special high-pressure blowing nozzle is also arranged above and below the rolled strip at a position away from the work roll.

[0004] However, the installation angle, position and precision of the blowing system of the rolling mill flattening liquid may change due to the change of the gas supply pressure of the nozzle, the vibration of the equipment, the inspection, maintenance or replacement, the gas flow fields of the outlets of the nozzles may interfere with each other, the shape of the blowing space is relatively complex, and the gas flow distribution is not reasonable, which may cause incomplete blowing and other problems, so that the flattening liquid remains on the surface of the rolled strip, and thus white spots, bright spots and rusting and other surface quality defects may occur on the surface of the rolled strip. Therefore, the present application provides a blowing system for reducing residual defects on the surface of tinned base plate. SUMMARY

[0005] The present application provides a blowing system for reducing residual defects on the surface of tinned base plate, so as to solve or at least partially solve the above technical problems.

[0006] Alternatively,

[0007] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a blowing system for reducing residual defects on the surface of tinned base plate, which comprises:

[0008] The device housing is provided with a rolled strip passing opening penetrating through the lower part of the left and right sides, and a rolled strip is movably inserted into the rolled strip passing opening.

[0009] The working roller is located at the upper end of the strip steel.

[0010] The first hydraulic cylinder is fixedly connected with a nozzle at the left end of the transmission rod, and the outer right side of the transmission rod of the first hydraulic cylinder is movably sleeved with a positioning ring, and the upper end of the positioning ring is fixedly connected with a second hydraulic cylinder.

[0011] Optionally, the inner cavity of the device shell is fixedly connected with a support rod at the lower part through a bolt, and a bolt fixing hole is formed in the middle of the front and rear ends of the support rod.

[0012] Optionally, the support rod is located at the right lower part of the working roller, and the support rod is located at the upper side of the strip steel.

[0013] Optionally, the lower left side of the nozzle is provided with a horizontal inclined surface.

[0014] Optionally, the first hydraulic cylinder and the nozzle are provided with a set angle with the horizontal plane.

[0015] Optionally, the second hydraulic cylinder is arranged vertically with the first hydraulic cylinder.

[0016] Optionally, the inner side wall of the positioning ring is annularly and uniformly inlaid with a plurality of ball bearings.

[0017] Optionally, the right end of the first hydraulic cylinder and the upper end of the second hydraulic cylinder are fixedly connected with a connecting disc, and the connecting disc is fixedly connected to the inner side of the device shell through a bolt.

[0018] Optionally, the nozzle is connected with a temperature controller through a pipeline, and the temperature controller is connected with a high-pressure gas station through a pipeline.

[0019] Optionally, the front and rear ends of the working roller are provided with a rotating shaft, and the rotating shaft is installed on the front and rear side walls of the device shell through a bearing.

[0020] The beneficial effects of the present application are:

[0021] Through the overall structure of the equipment, the second hydraulic cylinder is at a 90° angle with the first hydraulic cylinder, when the first hydraulic cylinder moves the nozzle to the working position, the second hydraulic cylinder applies a downward force to the positioning ring, so that the left end connecting rod of the first hydraulic cylinder transmission rod can apply a downward force, and the lower left side of the nozzle can be extruded and attached to the upper end of the support rod, so that the position of the nozzle is further fixed, the relative position accuracy of the nozzle and the working roller is improved, the position control accuracy of the nozzle in the blowing system is significantly improved, the flat liquid blowing effect is obviously improved, and the probability of water vapor condensation on the equipment and dripping onto the strip steel in the blowing system is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation to the scope. Other related drawings can also be obtained by those of ordinary skill in the art without any creative effort, on the premise that the specific postures shown in the drawings are changed.

[0023] Figure 1 The overall structural diagram of the embodiment of the present application.

[0024] Figure 2 The internal overall structural diagram of the embodiment of the present application.

[0025] Figure 3 The overall structural diagram of the nozzle of the embodiment of the present application.

[0026] Figure 4 The overall structural diagram of the embodiment of the present application. Figure 2 The enlarged view of A in the figure.

[0027] Figure 5 The sectional view of the positioning ring of the embodiment of the present application.

[0028] Figure 6 The schematic diagram of the initial position and working position of the overall structure of the embodiment of the present application.

[0029] Markings in the figure: 1. working roll, 2. strip steel, 3. support rod, 4. nozzle, 5. first hydraulic cylinder, 6. second hydraulic cylinder, 7. positioning ring, 8. ball, 9. horizontal slope, 10. device housing. DETAILED DESCRIPTION

[0030] The technical solutions of the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort, are within the scope of protection of the present application.

[0031] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture such as shown in the drawings. If the specific posture is changed, the directional indications will also change accordingly.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a rolled steel connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean 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 invention according to the specific circumstances.

[0033] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0034] In the prior art, since leveling fluid flows down, drips, splashes out, or diffuses outward from the rolling mill area in the form of mist along the roll surface and roll gap, and remains on the surface of the strip, a purging device is generally installed at the stand outlet of the leveling unit. High-pressure air is used to blow off the residual leveling fluid to avoid the leveling fluid from bringing in foreign objects and causing quality defects such as yellow spots caused by the leveling fluid residue. Usually, in order to achieve a good purging effect, special high-pressure nozzles are also installed above and below the strip at the rolling exit and away from the work roll.

[0035] To address the aforementioned problems, this invention proposes a purging system to reduce residual defects on the surface of tin-plated substrates. This system solves the problems in existing mill leveling fluid purging systems, which suffer from incomplete purging due to variations in nozzle air supply pressure, equipment vibration, changes in installation angle, position, and accuracy caused by maintenance or replacement, interference between airflow fields at the nozzle outlets, complex purging space shapes, and unreasonable airflow distribution. As a result, leveling fluid remains on the strip surface, leading to surface quality defects such as white spots, bright spots, and rust.

[0036] like Figures 1 to 6 As shown, this embodiment provides a purging system for reducing residual defects on the surface of a tin-plated substrate, comprising:

[0037] Device housing 10, the left and right side of the lower part of the device housing 10 is through the steel passageway, and the steel passageway is movably inserted with the steel 2;

[0038] Work roll 1, the work roll 1 is located on the upper end of the steel 2;

[0039] The first hydraulic cylinder 5, the left end of the transmission rod of the first hydraulic cylinder 5 is fixedly connected with the nozzle 4, and the outer right side of the transmission rod of the first hydraulic cylinder 5 is movably sleeved with the positioning ring 7, and the upper end of the positioning ring 7 is fixedly connected with the second hydraulic cylinder 6.

[0040] Specifically: the right end of the first hydraulic cylinder 5 and the second hydraulic cylinder 6 are all existing hydraulic cylinders in the market, the right end of the first hydraulic cylinder 5 and the second hydraulic cylinder 6 are connected with the external hydraulic oil supply device through the conduit, the second hydraulic cylinder 6 is at a 90° angle with the first hydraulic cylinder 5, when the first hydraulic cylinder 5 moves the nozzle 4 to the working position, the second hydraulic cylinder 6 applies downward force to the positioning ring 7, so that the left end of the transmission rod of the first hydraulic cylinder 5 can apply downward force to the connecting rod, and the lower left end of the nozzle can be extruded and attached to the upper end of the supporting rod 3, so that the position of the nozzle 4 is further fixed, and the relative position accuracy of the nozzle 4 and the work roll 1 is improved.

[0041] In this embodiment, as shown in Figure 1 The inner cavity of the device housing 10 is fixedly connected with the supporting rod 3 through bolts, and the front and rear ends of the supporting rod 3 are movably sleeved with the bolt fixing holes.

[0042] Specifically: the supporting rod 3 is a high-strength horizontal rod.

[0043] In this embodiment, as shown in Figure 2 The supporting rod 3 is located on the right lower part of the work roll 1, and the supporting rod 3 is located on the upper side of the steel 2.

[0044] Specifically: the steel 2 is a workpiece for transfer processing, and the supporting rod 3 is used to support and limit the nozzle 4.

[0045] In this embodiment, as shown in Figure 2 And Figure 3 The lower left end of the nozzle 4 is provided with a horizontal inclined surface 9.

[0046] Specifically: the horizontal inclined surface 9 can extrude the upper end of the supporting rod 3 when the nozzle 4 is obliquely displaced downward, so that the positioning of the nozzle 4 is more stable, and the vibration of the nozzle 4 during work is avoided.

[0047] In this embodiment, as shown in Figure 2 The first hydraulic cylinder 5 and the nozzle 4 are all at a set angle with the horizontal plane.

[0048] Specifically: the angle is θ, and θ control range 30 ° to 45 °, the optimal is 40 degrees.

[0049] In this embodiment, as shown in Figure 2 and Figure 4 The second hydraulic cylinder 6 is perpendicular to the first hydraulic cylinder 5.

[0050] Specifically, the second hydraulic cylinder 6 can exert a set force downward, so that the nozzle 4 does not vibrate during operation.

[0051] In this embodiment, as shown in Figure 4 and Figure 5 The inner wall of the positioning ring 7 is annularly arrayed with a plurality of ball bearings 8.

[0052] Specifically: the ball bearing 8 can rotate, and the transmission rod of the first hydraulic cylinder 5 can move left and right.

[0053] In this embodiment, as shown in Figure 2 The right end of the first hydraulic cylinder 5 and the upper end of the second hydraulic cylinder 6 are fixedly connected with the connecting disc, and the connecting disc is fixedly connected inside the device housing 10 through the bolt.

[0054] Specifically: the right end of the first hydraulic cylinder 5 and the second hydraulic cylinder 6 are both existing hydraulic cylinders on the market, and the right end of the first hydraulic cylinder 5 and the second hydraulic cylinder 6 are connected to the external hydraulic oil supply device through the conduit.

[0055] In this embodiment, as shown in Figure 6 The nozzle 4 is connected with the temperature controller through the pipeline, and the temperature controller is connected with the high-pressure gas station through the pipeline.

[0056] Specifically: the nozzle 4, the temperature controller and the high-pressure gas station all adopt the existing equipment on the market, and the working principle is not described here.

[0057] In this embodiment, as shown in Figure 1 and Figure 2 The front and rear ends of the work roll 1 are provided with shafts, and the shafts are installed on the front and rear side walls of the device housing 10 through bearings.

[0058] Specifically: the work roll 1 can rotate, and is located at the upper end of the strip steel 2, extruding the strip steel 2, so that the strip steel 2 runs more stably.

[0059] When the equipment is in use, the position of the nozzle 4 in the blowing system is controlled by the first hydraulic cylinder 5, the first hydraulic cylinder 5 ensures the stability of the position precision of the nozzle, the initial distance between the nozzle and the work roll surface is △, and the angle between the first hydraulic cylinder 5 and the horizontal line is θ, Figure 6 The upper part is a schematic view of the nozzle 4 in the initial position,Figure 6 The lower part is a schematic view of the nozzle moving to the working position, when the nozzle 4 is moved from the initial position to the working position, the stroke of the first hydraulic cylinder 5 is L, and the gap between the nozzle 4 and the roll surface of the work roll 1 is λ.

[0060] The second hydraulic cylinder 6 is at an angle of 90° with the first hydraulic cylinder 5. When the first hydraulic cylinder 5 moves the nozzle 4 to the working position, the second hydraulic cylinder 6 exerts a downward force on the positioning ring 7, so that the left end connecting rod of the transmission rod of the first hydraulic cylinder 5 can exert a downward force, and the lower left end of the nozzle can be pressed and fitted with the upper end of the support rod 3, so that the position of the nozzle 4 is further fixed, and the relative position accuracy of the nozzle 4 and the work roll 1 is improved.

[0061] The nozzle 4 of the blowing system is supplied with gas by a high-pressure gas station. The temperature control device between the high-pressure gas station and the nozzle 4 heats the compressed air of the high-pressure gas station by resistance wire, and adjusts by feedback through the temperature detection device. The control range of the temperature T of the compressed air is 60℃ to 80℃.

[0062] During blowing, the high-temperature compressed air sprayed by the nozzle 4 not only takes the leveling liquid away from the surface of the work roll 1 and the strip steel 2, but also makes it difficult for water vapor to condense on the equipment such as the rack and the pipeline, avoiding the defects such as residual stains caused by the condensation of water vapor and the dropping of water vapor on the strip steel 2,

[0063] and the initial gap Δ between the nozzle 4 and the work roll 1, the gap λ between the nozzle 4 and the work roll 1 when the nozzle 4 is in the working position, the stroke L of the first hydraulic cylinder 5 from the initial position to the working position, and the angle θ between the first hydraulic cylinder 5 and the horizontal line should satisfy the following relationship:

[0064] Δ = λ + L × tgθ

[0065] In order to ensure stable leveling blowing and good blowing effect, through on-site control, the control range of the temperature of the compressed air is 60℃ to 80℃; at the same time, the control range of Δ is 18mm to 22mm, the control range of λ is 3mm to 5mm, the control range of L is 24mm to 28mm, and the control range of θ is 30° to 45°, so as to finally obtain a surface quality qualified tin-plated substrate.

[0066] The overall structure can avoid the change of the position of the nozzle 4 caused by the reaction force of high-pressure air, equipment vibration and other reasons, maintain the stability of the gap between the nozzle 4 and the surface of the work roll 1, form a stable airflow field, improve the blowing effect of the leveling liquid residue on the surface of the strip steel 2, and further improve the surface quality of the strip steel 2. At the same time, through the temperature controller between the high-pressure gas station and the nozzle 4, the temperature of the compressed air is controlled, so that the temperature of the air field between the roll and the strip steel is kept constant, avoiding the condensation caused by the change of air temperature and the formation of stain defects on the strip steel.

[0067] The foregoing is considered as illustrative only of the principles of the application. Numerous modifications and changes will readily occur to those skilled in the art, and it is intended to embrace all such modifications and changes that fall within the scope of the application. Accordingly, the application is not to be restricted in scope to the specific embodiments disclosed herein but is to be accorded the full scope that the principles and novel features request appropriately granted.

Claims

1. A blow-off system for reducing surface residual defects of a tinned substrate, characterized by, Include: Device shell (10), the left and right sides of the lower part of the device shell (10) is opened with a steel passageway, and the steel passageway is movably inserted with a steel (2); Work roll (1), the work roll (1) is located on the upper end of the steel (2); The first hydraulic cylinder (5), the left end of the transmission rod of the first hydraulic cylinder (5) is fixedly connected with the nozzle (4), and the outer side of the transmission rod of the first hydraulic cylinder (5) is movably sleeved with the positioning ring (7), and the upper end of the positioning ring (7) is fixedly connected with the second hydraulic cylinder (6); The inner cavity of the device shell (10) is fixedly connected with the support rod (3) through the bolt at the lower part, and the support rod (3) is movably sleeved with the positioning ring (7) at the outer side of the transmission rod; The support rod (3) is located at the right lower part of the work roll (1), and the support rod (3) is located at the upper side of the steel (2); The lower end of the nozzle (4) is provided with a horizontal inclined plane (9) on the left side; The first hydraulic cylinder (5) and the nozzle (4) are provided with a set angle with the horizontal plane; The second hydraulic cylinder (6) is arranged vertically with the first hydraulic cylinder (5); The inner wall of the positioning ring (7) is evenly embedded with a plurality of ball bearings (8) in the form of annular array.

2. A purging system for reducing surface residual defects of a tinned substrate according to claim 1, wherein: The right end of the first hydraulic cylinder (5) and the upper end of the second hydraulic cylinder (6) are fixedly connected with the connecting disc, and the connecting disc is fixedly connected to the inner side of the device shell (10) through the bolt.

3. The purging system for reducing surface residual defects of a tinned substrate according to claim 1, wherein: The nozzle (4) is connected with the temperature controller through the pipeline, and the temperature controller is connected with the high pressure gas station through the pipeline.

4. The purging system for reducing surface residual defects of a tinned substrate according to claim 1, wherein: The front and rear ends of the work roll (1) are provided with the rotating shaft, and the rotating shaft is installed on the front and rear side walls of the device shell (10) through the bearing.

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