A duplex stainless steel billet rolling pretreatment device

Abstract

The utility model discloses a kind of duplex stainless steel billet rolling pretreatment device, belong to stainless steel billet rolling pretreatment technical field, including pretreatment rack;High-pressure water pump of scale-removing mechanism provides high-pressure water flow, through the rotary nozzle of annular water spray pipe to billet multi-angle all-around impact, can thoroughly remove surface oxide scale and stubborn rust mark;Compared with traditional fixed nozzle, the flow of rotary nozzle is more uniform, can adapt to different thickness oxide layer, avoid the rolling defect caused by scale-removing not clean, provide clean surface basis for subsequent rolling;Cleaning mechanism sprays special cleaning liquid by spray pipe and dissolves billet surface oil stain, cooperate with the mechanical wiping of brush roller to enhance cleaning effect, finally through clean water flushing pipe to wash residual cleaning liquid, realize the depth cleaning of "chemical dissolution+physical wiping+clean water rinsing";This combination mode can effectively remove dust, oil stains and other impurities, avoid impurities to be pressed into surface or to contaminate roll when rolling.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel billet rolling pretreatment technology, specifically to a duplex stainless steel billet rolling pretreatment device. Background Technology

[0002] Duplex stainless steel, possessing the excellent properties of both austenitic and ferritic materials, is widely used in petrochemical, marine engineering, and other fields. The quality of the pretreatment of its billets before rolling directly affects the surface finish and mechanical properties of the final product.

[0003] Currently, the pretreatment of duplex stainless steel billets has many shortcomings: existing technologies do not completely remove scale, and if the oxide scale on the billet surface is not completely removed, it is easily pressed into the surface during rolling, forming defects and affecting product quality; the cleaning effect is poor, and residual oil, dust and other impurities on the billet surface can cause slippage or mold contamination during rolling, and traditional cleaning methods cannot balance cleanliness and efficiency; if drying is not timely, if the cleaned billet enters the rolling process with water, it is prone to surface corrosion, especially since duplex stainless steel is sensitive to moisture, and corrosion will damage its corrosion resistance; these problems restrict the quality stability of duplex stainless steel rolled products, so this device provides a pretreatment device for duplex stainless steel billet rolling. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a pre-treatment device for rolling duplex stainless steel billets, thereby solving the aforementioned technical problems.

[0005] The present invention adopts the following technical solution: a pretreatment device for rolling duplex stainless steel billets, including a pretreatment frame, a conveyor roller table fixedly installed on the inner side of the pretreatment frame, a descaling mechanism, a cleaning mechanism and a drying mechanism fixedly installed sequentially on the top of the pretreatment frame along the conveying direction, and a control system fixedly installed on the outer side of the pretreatment frame, the control system being electrically connected to the conveyor roller table, the descaling mechanism, the cleaning mechanism and the drying mechanism respectively.

[0006] The descaling mechanism includes a high-pressure water pump, an annular spray pipe, and rotating nozzles. The high-pressure water pump is fixedly installed on the outside of the pretreatment frame, the annular spray pipe is fixedly installed on the top of the inside of the pretreatment frame, and the rotating nozzles are evenly distributed on the inside of the annular spray pipe. The high-pressure water pump and the annular spray pipe are connected by a pipe.

[0007] Preferably, the cleaning mechanism includes a cleaning liquid tank, a spray pipe, a brush roller, and a clean water rinsing pipe. The cleaning liquid tank is fixedly installed on the outside of the pretreatment frame. The spray pipe and the clean water rinsing pipe are sequentially fixedly installed on the top of the inside of the pretreatment frame. The brush roller is rotatably installed on the inside of the pretreatment frame, located between the spray pipe and the clean water rinsing pipe.

[0008] Preferably, the drying mechanism includes a hot air blower, an air duct, and a strip-shaped air outlet. The hot air blower is fixedly installed on the outside of the pretreatment frame, the air duct is fixedly installed on the top of the inside of the pretreatment frame, the strip-shaped air outlet is opened at the bottom of the air duct, and the hot air blower is connected to the air duct.

[0009] Preferably, the conveyor roller conveyor includes a drive motor, a transmission gear set, and a conveyor roller. The drive motor is fixedly installed on the outside of the pretreatment frame, the conveyor roller is rotatably installed on the inside of the pretreatment frame, the transmission gear set is fixedly installed at the end of the conveyor roller, and the drive motor is connected to the conveyor roller through the transmission gear set.

[0010] Preferably, a guide assembly is fixedly installed on the inner side of the pretreatment frame. The guide assembly includes a side guide roller and an adjusting screw. The side guide roller is slidably installed on the inner side of the pretreatment frame, and the adjusting screw is threaded on the outer side of the pretreatment frame, with its end connected to the side guide roller.

[0011] Preferably, the surface of the control system is provided with a touch screen, control buttons and an emergency stop switch, and a temperature sensor and a liquid level sensor are fixedly installed on the inner side of the pretreatment frame, both of which are electrically connected to the control system.

[0012] Preferably, a protective frame is fixedly installed on the outside of the pretreatment frame, an observation window is provided on the surface of the protective frame, and an inspection door is hinged to one side of the protective frame.

[0013] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0014] 1. The descaling mechanism's high-pressure water pump provides a high-pressure water flow, which impacts the steel billet from multiple angles and in all directions through the rotating nozzles of the annular spray pipe, thoroughly removing surface oxide scale and stubborn rust. Compared to traditional fixed nozzles, the rotating nozzles provide more uniform water coverage, adapting to oxide layers of varying thicknesses and avoiding rolling defects caused by incomplete descaling, thus providing a clean surface foundation for subsequent rolling. The cleaning mechanism uses a spray pipe to spray a special cleaning solution to dissolve oil stains on the steel billet surface, combined with mechanical wiping by brush rollers to enhance the cleaning effect. Finally, residual cleaning solution is rinsed away through a clean water rinsing pipe, achieving deep cleaning through "chemical dissolution + physical wiping + clean water rinsing." This combination effectively removes dust, oil, and other impurities, preventing impurities from being pressed into the surface or contaminating the rolls during rolling.

[0015] 2. The hot air blower of the drying unit generates hot air, which is blown evenly onto the surface of the steel billet through the air duct and the strip-shaped air outlet, evaporating residual moisture in a short time. The temperature sensor monitors the hot air temperature in real time to ensure rapid drying without affecting the metallographic structure of duplex stainless steel, and to prevent the steel billet from rusting due to water retention during storage or transportation after cleaning. The conveyor rollers drive the steel billet through the descaling, cleaning and drying processes in sequence, realizing the continuity of the pretreatment process and avoiding the time-consuming steel billet transfer and secondary pollution of traditional decentralized processes. The drive motor drives the conveyor rollers to operate synchronously through the transmission gear set, ensuring that the steel billet moves at a uniform speed and that the processes are closely connected, greatly improving the pretreatment efficiency. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a partial three-dimensional structural diagram of the control system in this utility model;

[0019] Figure 3 This is a partial three-dimensional structural diagram of the cleaning mechanism in this utility model;

[0020] Figure 4 This is a partial structural diagram of the guide component in this utility model.

[0021] Figure Labels

[0022] 1. Pre-treatment frame; 2. Conveyor roller conveyor; 21. Drive motor; 22. Transmission gear set; 23. Conveyor roller; 3. Descaling mechanism; 31. High-pressure water pump; 32. Annular water spray pipe; 33. Rotary nozzle; 4. Cleaning mechanism; 41. Cleaning liquid tank; 42. Spray pipe; 43. Brush roller; 44. Clean water rinsing pipe; 5. Drying mechanism; 51. Hot air blower; 52. Air duct; 53. Strip air outlet; 6. Control system; 61. Touch screen; 62. Control button; 63. Emergency stop switch; 64. Temperature sensor; 65. Liquid level sensor; 7. Guide assembly; 71. Side guide roller; 72. Adjusting screw; 8. Protective frame; 81. Observation window; 82. Inspection door. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] The following is in conjunction with the appendix Figure 1-4 This document provides a detailed description of the technical solutions provided in each embodiment of the present invention.

[0025] This utility model provides a pretreatment device for rolling duplex stainless steel billets, including a pretreatment frame 1. A conveyor roller 2 is fixedly installed on the inner side of the pretreatment frame 1. A descaling mechanism 3, a cleaning mechanism 4, and a drying mechanism 5 are fixedly installed sequentially on the top of the pretreatment frame 1 along the conveying direction. A control system 6 is fixedly installed on the outer side of the pretreatment frame 1. The control system 6 is electrically connected to the conveyor roller 2, the descaling mechanism 3, the cleaning mechanism 4, and the drying mechanism 5 respectively.

[0026] The descaling mechanism 3 includes a high-pressure water pump 31, an annular spray pipe 32, and a rotating nozzle 33. The high-pressure water pump 31 is fixedly installed on the outside of the pretreatment frame 1, the annular spray pipe 32 is fixedly installed on the top of the inside of the pretreatment frame 1, and the rotating nozzle 33 is evenly distributed on the inside of the annular spray pipe 32. The high-pressure water pump 31 and the annular spray pipe 32 are connected by a pipe.

[0027] Furthermore, the high-pressure water pump 31 of the descaling mechanism 3 provides high-pressure water flow, which impacts the steel billet 360° in all directions through the rotating nozzle 33 of the annular water spray pipe 32, which can thoroughly remove surface oxide scale and stubborn rust. Compared with the traditional fixed nozzle, the water flow of the rotating nozzle 33 is more uniform and can adapt to oxide layers of different thicknesses, avoiding rolling defects caused by incomplete descaling and providing a clean surface foundation for subsequent rolling.

[0028] In a further preferred embodiment of this utility model, the cleaning mechanism 4 includes a cleaning liquid tank 41, a spray pipe 42, a brush roller 43, and a clean water rinsing pipe 44. The cleaning liquid tank 41 is fixedly installed on the outside of the pretreatment frame 1. The spray pipe 42 and the clean water rinsing pipe 44 are sequentially fixedly installed on the top of the inner side of the pretreatment frame 1. The brush roller 43 is rotatably installed on the inner side of the pretreatment frame 1, located between the spray pipe 42 and the clean water rinsing pipe 44.

[0029] Furthermore, the cleaning mechanism 4 sprays a special cleaning solution through the spray pipe 42 to dissolve the oil stains on the surface of the steel billet, and the mechanical wiping of the brush roller 43 enhances the cleaning effect. Finally, the residual cleaning solution is rinsed off through the clean water rinsing pipe 44, achieving deep cleaning through "chemical dissolution + physical wiping + clean water rinsing". This combination can effectively remove impurities such as dust and oil stains, and prevent impurities from being pressed into the surface or contaminating the rolls during rolling.

[0030] In a further preferred embodiment of the present invention, the drying mechanism 5 includes a hot air blower 51, an air duct 52, and a strip-shaped air outlet 53. The hot air blower 51 is fixedly installed on the outside of the pretreatment frame 1, the air duct 52 is fixedly installed on the top of the inside of the pretreatment frame 1, and the strip-shaped air outlet 53 is opened at the bottom of the air duct 52. The hot air blower 51 is connected to the air duct 52.

[0031] Furthermore, the hot air blower 51 of the drying unit 5 generates hot air, which is blown evenly onto the surface of the steel billet through the air duct 52 and the strip-shaped air outlet 53, which can evaporate residual moisture in a short time; the temperature sensor 64 monitors the hot air temperature in real time to ensure that rapid drying is achieved without affecting the metallographic structure of duplex stainless steel, and to prevent the steel billet from rusting due to water retention during storage or transportation after cleaning.

[0032] In a further preferred embodiment of the present invention, the conveyor roller 2 includes a drive motor 21, a transmission gear set 22 and a conveyor roller 23. The drive motor 21 is fixedly installed on the outside of the pretreatment frame 1, the conveyor roller 23 is rotatably installed on the inside of the pretreatment frame 1, the transmission gear set 22 is fixedly installed on the end of the conveyor roller 23, and the drive motor 21 is connected to the conveyor roller 23 through the transmission gear set 22.

[0033] Furthermore, the conveyor roller 2 drives the steel billet through the descaling, cleaning and drying processes in sequence, realizing the continuity of the pretreatment process and avoiding the time-consuming steel billet transfer and secondary pollution of the traditional decentralized process; the drive motor 21 drives the conveyor roller 23 to operate synchronously through the transmission gear set 22, ensuring that the steel billet moves at a uniform speed and that the processes are closely connected, which greatly improves the pretreatment efficiency.

[0034] In a further preferred embodiment of the present invention, a guide assembly 7 is fixedly installed on the inner side of the pretreatment frame 1. The guide assembly 7 includes a side guide roller 71 and an adjusting screw 72. The side guide roller 71 is slidably installed on the inner side of the pretreatment frame 1, and the adjusting screw 72 is threadedly installed on the outer side of the pretreatment frame 1, with its end connected to the side guide roller 71.

[0035] Furthermore, the side guide rollers 71 of the guide assembly 7 can adjust the spacing according to the width of the billet by adjusting the screw 72 to ensure that the billet does not deviate during the conveying process. This positioning function allows the water flow and brush during descaling and cleaning to act evenly on the surface of the billet, avoiding local inadequate treatment due to deviation and improving the consistency of pretreatment.

[0036] In a further preferred embodiment of this utility model, the surface of the control system 6 is provided with a touch screen 61, a control button 62 and an emergency stop switch 63, and a temperature sensor 64 and a liquid level sensor 65 are fixedly installed on the inner side of the pretreatment frame 1. Both the temperature sensor 64 and the liquid level sensor 65 are electrically connected to the control system 6.

[0037] Furthermore, the touch screen 61 of the control system 6 allows for intuitive setting of parameters such as descaling pressure, cleaning fluid concentration, and hot air temperature. The temperature sensor 64 and liquid level sensor 65 provide real-time data feedback, enabling precise parameter control. The control button 62 and emergency stop switch 63 facilitate manual intervention, adapting to the pretreatment needs of steel billets of different specifications and reducing reliance on operator experience.

[0038] In a further preferred embodiment of the present invention, a protective frame 8 is fixedly installed on the outer side of the pretreatment frame 1, an observation window 81 is provided on the surface of the protective frame 8, and an inspection door 82 is hinged to one side of the protective frame 8.

[0039] Furthermore, the protective frame 8 prevents water splashing and hot air leakage during descaling and cleaning, the observation window 81 facilitates real-time monitoring of the processing status, and the maintenance door 82 facilitates equipment maintenance; the overall structure has good sealing performance, which not only protects the safety of operators, but also reduces the interference of the external environment on the pretreatment process and improves the reliability of the device operation.

[0040] Specifically, the descaling mechanism 3 uses a high-pressure water pump 31 to provide high-pressure water flow, which impacts the steel billet 360° from all directions through the rotating nozzle 33 of the annular spray pipe 32, thoroughly removing surface oxide scale and stubborn rust. Compared with traditional fixed nozzles, the water flow from the rotating nozzle 33 is more uniform and can adapt to oxide layers of different thicknesses, avoiding rolling defects caused by incomplete descaling and providing a clean surface foundation for subsequent rolling. The cleaning mechanism 4 uses a spray pipe 42 to spray a special cleaning solution to dissolve oil stains on the surface of the steel billet, and the mechanical wiping with the brush roller 43 enhances the cleaning effect. Finally, the residual cleaning solution is rinsed off through the clean water rinsing pipe 44, achieving deep cleaning through "chemical dissolution + physical wiping + clean water rinsing". This combination method can effectively remove dust, oil stains and other impurities, preventing impurities from being pressed into the surface or contaminating the rolls during rolling.

[0041] The hot air blower 51 of the drying unit 5 generates hot air, which is blown evenly onto the surface of the steel billet through the air duct 52 and the strip-shaped air outlet 53, evaporating residual moisture in a short time. The temperature sensor 64 monitors the hot air temperature in real time to ensure rapid drying without affecting the metallographic structure of duplex stainless steel, and to prevent the steel billet from rusting due to water retention during storage or transportation after cleaning. The conveyor roller 2 drives the steel billet through the descaling, cleaning and drying processes in sequence, realizing the continuity of the pretreatment process and avoiding the time-consuming steel billet transfer and secondary pollution of traditional decentralized processes. The drive motor 21 drives the conveyor roller 23 to operate synchronously through the transmission gear set 22, ensuring that the steel billet moves at a uniform speed and that the processes are closely connected, greatly improving the pretreatment efficiency.

[0042] The side guide rollers 71 of the guide assembly 7 can adjust the spacing according to the width of the billet by adjusting the screw 72 to ensure that the billet does not deviate during the conveying process. This positioning function allows the water flow and brush during descaling and cleaning to act evenly on the surface of the billet, avoiding local inadequate treatment due to deviation and improving the consistency of pretreatment.

[0043] The touch screen 61 of the control system 6 allows for intuitive setting of parameters such as descaling pressure, cleaning fluid concentration, and hot air temperature. The temperature sensor 64 and liquid level sensor 65 provide real-time data feedback, enabling precise parameter control. The control button 62 and emergency stop switch 63 facilitate manual intervention, adapting to the pretreatment needs of steel billets of different specifications and reducing reliance on operator experience.

[0044] The protective frame 8 prevents water splashing and hot air leakage during descaling and cleaning. The observation window 81 facilitates real-time monitoring of the processing status, and the maintenance door 82 facilitates equipment maintenance. The overall structure has good sealing performance, which not only protects the safety of operators but also reduces the interference of the external environment on the pretreatment process and improves the reliability of the equipment operation.

[0045] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A pretreatment device for rolling duplex stainless steel billets, characterized in that, include: A pretreatment frame (1) is provided, with a conveyor roller (2) fixedly installed on the inner side of the pretreatment frame (1). A descaling mechanism (3), a cleaning mechanism (4), and a drying mechanism (5) are fixedly installed sequentially on the top of the pretreatment frame (1) along the conveying direction. A control system (6) is fixedly installed on the outer side of the pretreatment frame (1). The control system (6) is electrically connected to the conveyor roller (2), the descaling mechanism (3), the cleaning mechanism (4), and the drying mechanism (5) respectively. The descaling mechanism (3) includes a high-pressure water pump (31), an annular spray pipe (32), and a rotating nozzle (33). The high-pressure water pump (31) is fixedly installed on the outside of the pretreatment frame (1), the annular spray pipe (32) is fixedly installed on the top of the inside of the pretreatment frame (1), and the rotating nozzle (33) is evenly distributed on the inside of the annular spray pipe (32). The high-pressure water pump (31) and the annular spray pipe (32) are connected by a pipe.

2. The pretreatment device for rolling duplex stainless steel billets according to claim 1, characterized in that, The cleaning mechanism (4) includes a cleaning liquid tank (41), a spray pipe (42), a brush roller (43), and a clean water rinsing pipe (44). The cleaning liquid tank (41) is fixedly installed on the outside of the pretreatment frame (1). The spray pipe (42) and the clean water rinsing pipe (44) are fixedly installed on the top of the inner side of the pretreatment frame (1) in sequence. The brush roller (43) is rotatably installed on the inner side of the pretreatment frame (1) and is located between the spray pipe (42) and the clean water rinsing pipe (44).

3. The pretreatment device for rolling duplex stainless steel billets according to claim 1, characterized in that, The drying mechanism (5) includes a hot air blower (51), an air duct (52), and a strip-shaped air outlet (53). The hot air blower (51) is fixedly installed on the outside of the pretreatment frame (1), the air duct (52) is fixedly installed on the top of the inside of the pretreatment frame (1), and the strip-shaped air outlet (53) is opened at the bottom of the air duct (52). The hot air blower (51) is connected to the air duct (52).

4. The pretreatment device for rolling duplex stainless steel billets according to claim 1, characterized in that, The conveyor roller conveyor (2) includes a drive motor (21), a transmission gear set (22), and a conveyor roller (23). The drive motor (21) is fixedly installed on the outside of the pretreatment frame (1), and the conveyor roller (23) is rotatably installed on the inside of the pretreatment frame (1). The transmission gear set (22) is fixedly installed at the end of the conveyor roller (23), and the drive motor (21) is connected to the conveyor roller (23) through the transmission gear set (22).

5. The pretreatment device for rolling duplex stainless steel billets according to claim 1, characterized in that, A guide assembly (7) is fixedly installed on the inner side of the pretreatment frame (1). The guide assembly (7) includes a side guide roller (71) and an adjusting screw (72). The side guide roller (71) is slidably installed on the inner side of the pretreatment frame (1), and the adjusting screw (72) is threaded on the outer side of the pretreatment frame (1) and its end is connected to the side guide roller (71).

6. The pretreatment device for rolling duplex stainless steel billets according to claim 1, characterized in that, The surface of the control system (6) is provided with a touch screen (61), control buttons (62) and an emergency stop switch (63). A temperature sensor (64) and a liquid level sensor (65) are fixedly installed on the inner side of the pretreatment frame (1). The temperature sensor (64) and the liquid level sensor (65) are both electrically connected to the control system (6).

7. The pretreatment apparatus for rolling duplex stainless steel billets according to claim 1, characterized in that, A protective frame (8) is fixedly installed on the outside of the pretreatment frame (1). An observation window (81) is provided on the surface of the protective frame (8). A maintenance door (82) is hinged to one side of the protective frame (8).

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