A steel slab surface treatment device for hot-rolled steel production

Abstract

A kind of steel plate blank surface treatment device for hot-rolled steel production, including conveying roller way and being provided with cleaning mechanism, clean water spray component and compressed air injection component in conveying roller way transport direction in sequence, conveying roller way export end and the inlet track of heating furnace butt joint;The cleaning mechanism includes wet roller and steel wire roll, wet roller is rotatably installed on the support frame across conveying roller way, wet roller has cavity inside, wet roller one end is connected with the alkali supply pipe for supplying alkaline cleaning solution by swivel joint, several permeation holes for the alkaline cleaning solution to seep out to the surface of wet roller roller body are opened on the side wall of wet roller, steel wire roll is sleeved on the outer periphery of wet roller;The clean water spray component is arranged on the support frame downstream of cleaning mechanism;The compressed air injection component is arranged on the support frame close to the outlet of surface treatment device.This utility model aims at increasing the surface cleanliness of steel plate blank before entering heating furnace.

Description

Technical Field

[0001] This utility model relates to the field of hot-rolled steel production equipment, specifically a surface treatment device for steel plate blanks used in hot-rolled steel production. Background Technology

[0002] In the production of hot-rolled steel, steel slabs are typically heated in a furnace before entering a hot rolling mill. To ensure the quality of the final product, the slabs generally undergo a specialized pretreatment process to remove surface rust and oil before entering the furnace. If the surface treatment is incomplete, residual oil can burn in the furnace, causing localized overheating of the slab and resulting in localized "overheating." Furthermore, if rust is not removed, it can be pressed into the steel during subsequent rolling, affecting the quality of the steel.

[0003] However, in actual production, due to aging or malfunction of rust removal equipment, or improper operation and lax control parameters by degreasing personnel, the surface treatment effect of steel slabs is often difficult to consistently meet standards. Furthermore, during the transfer of steel slabs, dust, residue, and other contaminants from the workshop environment may fall and adhere to the surface, further affecting the surface quality of the steel slabs before they enter the heating furnace. Utility Model Content

[0004] The present invention aims to provide a surface treatment device for steel slab blanks used in hot-rolled steel production, so as to reduce the problem of insufficient surface cleanliness of steel slab blanks before entering the heating furnace, which affects the production quality of hot-rolled steel.

[0005] To solve the above technical problems, the specific solution adopted by this utility model is as follows: It includes a conveyor roller conveyor and a cleaning mechanism, a water spraying assembly, and a compressed air blowing assembly arranged sequentially along the conveyor roller conveyor's transport direction. The outlet end of the conveyor roller conveyor is connected to the inlet track of the heating furnace. The cleaning mechanism is used to clean rust and oil stains from the surface of the steel slab blank. The cleaning mechanism includes a wetting roller and a wire coil. The wetting roller is rotatably mounted on a support frame spanning the conveyor roller conveyor. The wetting roller has a cavity inside. One end of the wetting roller is connected to an alkali supply pipe for supplying alkaline cleaning solution via a rotary joint. Several permeation holes are opened on the side wall of the wetting roller for allowing the alkaline cleaning solution to seep out to the surface of the wetting roller body. The wire coil is sleeved around the outer periphery of the wetting roller. The water spraying assembly is located on the support frame downstream of the cleaning mechanism and is used to rinse the surface of the steel slab blank with residual alkali solution and loose dirt. The compressed air blowing assembly is located on the support frame near the outlet of the surface treatment device and is used to dry the residual water on the surface of the steel slab blank.

[0006] A further optimization of a surface treatment device for steel slab blanks used in hot-rolled steel production: a cleaning mechanism, a water spraying assembly, and a compressed air blowing assembly are sequentially installed on the support frame located above and below the conveyor rollers and along the conveyor roller transport direction, for simultaneously performing surface treatment on the upper and lower surfaces of the steel slab blanks.

[0007] Further optimization of a surface treatment device for steel slab blanks used in hot-rolled steel production: multiple sets of cleaning mechanisms and water spraying components are sequentially and cyclically installed on the support frames above and below the conveyor rollers along the conveying path of the conveyor rollers.

[0008] Further optimization of a surface treatment device for steel slab blanks used in hot-rolled steel production: the spraying directions of the water spraying assembly and the compressed air blowing assembly are both inclined toward the inlet of the conveyor roller table.

[0009] A further optimization of a surface treatment device for steel plate blanks used in hot-rolled steel production: a first anti-splash baffle and a second anti-splash baffle are respectively provided on the support frame above and below the conveyor roller. The first anti-splash baffle is located outside the steel wire roll rotation path of the cleaning mechanism above the conveyor roller, and the second anti-splash baffle is located outside the steel wire roll rotation path of the cleaning mechanism below the conveyor roller.

[0010] A further optimization of a surface treatment device for steel plate blanks used in hot-rolled steel production: a first scraper is provided on the support frame near the steel wire coil above the conveyor roller, and a second scraper is provided on the support frame near the steel wire coil below the conveyor roller.

[0011] A further optimization of a surface treatment device for steel plate blanks used in hot-rolled steel production: both the first scraper and the second scraper are arc-shaped structures. The arc-shaped structure of the first scraper is used to scrape off impurities and debris from the surface of the wire coil while collecting the scraped impurities and debris. The arc-shaped structure of the second scraper is used to guide the scraped impurities and debris to fall in an orderly manner.

[0012] A further optimization of a surface treatment device for steel plate blanks used in hot-rolled steel production: a chip collection groove is provided below the second scraper, which is used to collect impurities and waste chips guided down by the second scraper.

[0013] Beneficial Effects: This invention features a steel slab surface treatment device installed at the front end of the furnace inlet track. The rotation of a wetting roller drives a wire coil to brush and clean rust and hard impurities from the surface of the steel slab. Simultaneously, alkaline cleaning solution inside the wetting roller seeps through permeation holes to the roller surface and wets the wire coil, ensuring the wire coil evenly distributes the alkaline cleaning solution onto the steel slab surface during mechanical cleaning, effectively removing oil stains. A water spray assembly located downstream of the cleaning mechanism promptly washes away residual alkaline solution and loosened contaminants from the steel slab surface; a compressed air blowing assembly near the device outlet dries any remaining moisture on the steel slab surface. This device significantly improves the surface cleanliness of the steel slab before it enters the furnace, helping to reduce quality problems in hot-rolled steel products caused by surface uncleanliness.

[0014] This utility model is equipped with a cleaning mechanism, a water spraying assembly, and a compressed air blowing assembly on the support frame above and below the conveyor roller, which can simultaneously clean, rinse, and dry the bottom surface of the steel plate blank, further improving the surface cleanliness of the steel plate blank before it enters the heating furnace. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the surface treatment device of this utility model; Figure 2 This is a schematic diagram of the connection structure between the cleaning mechanism and the support frame of this utility model; Figure 3 This is a cross-sectional view of the wetting roller of this utility model; Figure 4 A schematic diagram showing the sequential cyclic arrangement of the cleaning mechanism and the clean water spray assembly in this utility model; The markings in the diagram are: 1. Conveying roller, 2. Steel plate blank, 3. First scraper, 4. Support frame, 5. First anti-splash baffle, 6. Wetting roller, 7. Steel wire coil, 8. Cleaning mechanism, 9. Clean water spray assembly, 10. Compressed air spray assembly, 11. Chip collection trough, 12. Second scraper, 13. Second anti-splash baffle, 14. Alkali supply pipe, 15. Rotary joint, 16. Rotating motor, 17. Permeation hole. Detailed Implementation

[0016] Example 1 like Figure 1 As shown, a surface treatment device for steel slab blanks used in hot-rolled steel production includes a conveyor roller 1 for supporting and continuously conveying steel slab blanks 2. The outlet end of the conveyor roller 1 is connected to the inlet track of the heating furnace. The direct connection between the conveyor roller 1 and the heating furnace allows the steel slab blanks 2 to directly enter the heating furnace after being processed by the surface treatment device, thus avoiding secondary pollution of the treated steel slab blanks 2 by the workshop environment.

[0017] Cleaning mechanisms 8 for cleaning rust and oil stains on the surface of steel slab blank 2 are provided above and below the conveyor roller 1. The cleaning mechanism 8 includes a wetting roller 6 and a wire coil 7. The wetting roller 6 has the function of conveying alkaline cleaning liquid and driving the wire coil 7 to rotate. The wire coil 7 directly contacts the steel slab blank 2 to perform mechanical brushing tasks.

[0018] like Figure 2 and Figure 3 As shown, the wetting roller 6 is rotatably mounted on a support frame 4 spanning the conveyor roller table 1. The support frame 4 forms the skeleton of the entire device, used to install and fix all functional components. The wetting roller 6 has an internal cavity, which serves as a temporary storage and distribution channel for the alkaline cleaning solution. One end of the wetting roller 6 is connected to an alkaline supply pipe 14 for supplying the alkaline cleaning solution via a rotary joint 15. Several permeation holes 17 are formed on the side wall of the wetting roller 6 to allow the alkaline cleaning solution to seep out onto the surface of the roller body. The permeation holes 17 allow the cleaning solution to seep out evenly and slowly, avoiding splashing and ensuring that the wire coil 7 is evenly wetted. The wire coil 7 is sleeved on the outer periphery of the wetting roller 6 and is rotated by the wetting roller 6, thereby removing the adhering substances from the surface of the steel plate blank 2. In this embodiment, the rotation of the wetting roller 6 is driven by the rotating motor 16 mounted on the support frame 4. The rotating motor 16 drives the wetting roller 6 of the cleaning mechanism 8 to rotate, and the wetting roller 6 drives the wire coil 7 to rotate, thereby realizing the removal of dirt from the surface of the steel plate blank 2 by the wire coil 7. The wire coil 7 is made of stainless steel wire.

[0019] A water spraying assembly 9 is provided on the support frame 4 along the transport direction of the conveyor roller 1 and downstream of the cleaning mechanism 8. It is used to rinse the surface of the steel plate blank 2 of residual alkaline solution and loose dirt. The water spraying assembly 9 sprays high-pressure clean water onto the surface of the cleaned steel plate blank 2 and uses the impact force of the water flow to wash away the residue on the surface of the steel plate.

[0020] The support frame 4 is equipped with a compressed air blowing assembly 10 near the outlet of the surface treatment device for drying the residual water on the surface of the steel plate blank 2. The compressed air blowing assembly 10 sprays high-speed compressed air onto the surface of the rinsed steel plate blank 2. The high-speed airflow blows away and dries the residual water on the surface of the steel plate, ensuring that the steel plate is dry before entering the furnace.

[0021] A cleaning mechanism 8, a water spraying assembly 9, and a compressed air blowing assembly 10 are sequentially provided on the support frame 4 located above and below the conveyor roller 1 along the transport direction of the conveyor roller 1. These are used to simultaneously perform surface treatment on the upper and lower surfaces of the steel plate blank 2, further improving the surface cleanliness of the steel plate blank 2. The cleaning mechanism 8 below the conveyor roller 1 is located between the two rollers of the conveyor roller 1.

[0022] A first anti-splash baffle 5 and a second anti-splash baffle 13 are respectively provided on the support frame 4 above and below the conveyor roller 1. The first anti-splash baffle 5 is located outside the rotation path of the steel wire roll 7 of the cleaning mechanism 8 above the conveyor roller 1, and the second anti-splash baffle 13 is located outside the rotation path of the steel wire roll 7 of the cleaning mechanism 8 below the conveyor roller 1. The first anti-splash baffle 5 and the second anti-splash baffle 13 can block the splashed alkaline liquid, water and debris during the cleaning process, protect the surrounding environment and prevent the splashes from causing secondary pollution to the steel plate blank 2.

[0023] A first scraper 3 is provided on the support frame 4 near the steel wire roll 7 above the conveyor roller 1, and a second scraper 12 is provided on the support frame 4 near the steel wire roll 7 below the conveyor roller 1. One end of the first scraper 3 and the second scraper 12 are respectively attached to the edge of their corresponding steel wire roll 7. The first scraper 3 and the second scraper 12 scrape off the surface debris wrapped around the steel wire roll 7 of the cleaning mechanism 8, thus maintaining the cleaning efficiency of the cleaning mechanism 8.

[0024] The first scraper 3 has an arc-shaped structure. The arc-shaped structure is used to scrape off impurities and debris from the surface of the wire coil 7, and at the same time collect the scraped impurities and debris. After the first scraper 3 scrapes off the debris, most of the debris falls into the depression of the arc-shaped structure, which facilitates the centralized treatment of debris and improves the cleanliness of the equipment.

[0025] The second scraper 12 has an arc-shaped structure, and a chip collection groove 11 is provided below the second scraper 12. The arc-shaped structure is used to guide impurities and debris into the chip collection groove 11. After the second scraper 12 scrapes off the debris, the debris will fall to the ground due to gravity. The arc-shaped structure of the second scraper 12 guides the debris to fall into the chip collection groove 11 in an orderly manner, which improves the cleanliness and safety of the equipment.

[0026] The spraying directions of the clean water spraying assembly 9 and the compressed air blowing assembly 10 are both inclined towards the inlet direction of the conveyor roller 1. The spray nozzles inclined towards the inlet direction of the conveyor roller 1 are opposite to the conveying direction of the conveyor roller 1, which avoids the dirt being pushed to the treated area, causing the clean steel plate blank 2 to be recontaminated.

[0027] The method of using the surface treatment device for steel slab blanks in hot-rolled steel production according to this utility model is as follows: First, start the conveyor roller 1 to send the steel slab blank 2 into the surface treatment device; when the steel slab blank 2 passes through the cleaning area of ​​the surface treatment device, the upper and lower cleaning mechanisms 8 are started simultaneously, and the rotating motor 16 drives the wetting roller 6 to drive the wire coil 7 to rotate. The wire coil 7 brushes the upper and lower surfaces of the steel plate with the assistance of alkaline cleaning solution; then, the clean water spray assembly 9 washes away the residual dirt and alkaline solution on the upper and lower surfaces of the steel slab blank 2 in the counter-current direction; finally, at the outlet, the compressed air blowing assembly 10 thoroughly dries the surface of the steel slab blank 2, thereby obtaining a clean and dry steel slab blank 2. The cleaned steel slab blank 2 is directly sent to the subsequent heating furnace process.

[0028] Example 2 This embodiment is an optimization based on Embodiment 1.

[0029] like Figure 4 As shown, multiple sets of cleaning mechanisms 8 and water spraying components 9 are sequentially and cyclically arranged on the support frames 4 above and below the conveyor roller 1 along the conveying path of the conveyor roller 1. The repeated cyclic arrangement of the cleaning mechanisms 8 and water spraying components 9 achieves progressive cleaning and improves the cleaning effect of the device. The number of cleaning mechanisms 8 and water spraying components 9 is selected according to the actual situation of the plant area (the surface contamination of the steel plate blank 2 and the working area of ​​the plant area). In this embodiment, there are two cleaning mechanisms 8 and two water spraying components 9.

Claims

1. A surface treatment device for steel slab blanks used in hot-rolled steel production, characterized in that: It includes a conveyor roller (1) and a cleaning mechanism (8), a water spraying assembly (9) and a compressed air blowing assembly (10) arranged sequentially along the conveyor roller (1) in the transport direction. The outlet end of the conveyor roller (1) is connected to the inlet track of the heating furnace. The cleaning mechanism (8) is used to clean the rust and oil stains on the surface of the steel plate blank (2). The cleaning mechanism (8) includes a wetting roller (6) and a wire coil (7). The wetting roller (6) is rotatably mounted on a support frame (4) that spans the conveying roller track (1). The wetting roller (6) has a cavity inside. One end of the wetting roller (6) is connected to an alkali supply pipe (14) for supplying alkaline cleaning liquid through a rotary joint (15). Several permeation holes (17) are opened on the side wall of the wetting roller (6) for permeating the alkaline cleaning liquid to the surface of the roller body of the wetting roller (6). The wire coil (7) is sleeved on the outer periphery of the wetting roller (6). The water spray assembly (9) is located on the support frame (4) downstream of the cleaning mechanism (8) and is used to rinse the surface of the steel plate blank (2) of residual alkaline solution and loose dirt. The compressed air blowing assembly (10) is mounted on a support frame (4) near the outlet of the surface treatment device and is used to dry the residual water on the surface of the steel plate blank (2).

2. The surface treatment device for steel slabs used in hot-rolled steel production as described in claim 1, characterized in that: A cleaning mechanism (8), a water spraying assembly (9) and a compressed air blowing assembly (10) are sequentially provided on the support frame (4) above and below the conveyor roller (1) along the transport direction of the conveyor roller (1) to simultaneously perform surface treatment on the upper and lower surfaces of the steel plate blank (2).

3. The surface treatment device for steel slabs used in hot-rolled steel production as described in claim 1, characterized in that: Multiple sets of cleaning mechanisms (8) and clean water spraying components (9) are sequentially arranged on the support frame (4) above and below the conveyor roller (1) along the conveying path direction of the conveyor roller (1).

4. The surface treatment device for steel slabs used in hot-rolled steel production as described in claim 1, characterized in that: The spraying directions of the water spraying assembly (9) and the compressed air blowing assembly (10) are both inclined toward the inlet direction of the conveyor roller (1).

5. The surface treatment device for steel slabs used in hot-rolled steel production as described in claim 1, characterized in that: A first anti-splash baffle (5) and a second anti-splash baffle (13) are respectively provided on the support frame (4) above and below the conveyor roller (1). The first anti-splash baffle (5) is located outside the rotation path of the wire roll (7) of the cleaning mechanism (8) above the conveyor roller (1), and the second anti-splash baffle (13) is located outside the rotation path of the wire roll (7) of the cleaning mechanism (8) below the conveyor roller (1).

6. The surface treatment device for steel slabs used in hot-rolled steel production as described in claim 1, characterized in that: A first scraper (3) is provided on the support frame (4) near the wire roll (7) above the conveyor roller (1), and a second scraper (12) is provided on the support frame (4) near the wire roll (7) below the conveyor roller (1).

7. The surface treatment device for steel slabs used in hot-rolled steel production as described in claim 6, characterized in that: Both the first scraper (3) and the second scraper (12) are arc-shaped structures. The arc-shaped structure of the first scraper (3) is used to scrape off impurities and debris from the surface of the wire coil (7) while collecting the scraped impurities and debris. The arc-shaped structure of the second scraper (12) is used to guide the scraped impurities and debris to fall in an orderly manner.

8. The surface treatment device for steel slabs used in hot-rolled steel production as described in claim 7, characterized in that: The second scraper (12) is provided with a chip collection groove (11) below it. The chip collection groove (11) is used to receive the impurities and debris guided down by the second scraper (12).

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