Waste liquid recovery method and device of coil spraying system

Abstract

The invention discloses a waste liquid recycling method and device of a coil spraying system, and relates to the technical field of high-speed wire rod production in the steel industry, the waste liquid recycling device comprises a coil conveying line, a spraying cover longitudinally moving along a spraying station and a plurality of waste liquid recycling assemblies arranged at the opening end of the spraying cover, and a C-shaped hook is arranged on the coil conveying line; a spraying assembly acting on the steel coil is arranged in the spraying cover, an axial notch allowing the C-shaped hook to be inserted is formed in the top of the spraying cover, a flexible sealing piece capable of being opened in the side direction is arranged at the axial notch, and all the waste liquid recycling assemblies are hinged to the spraying cover through swing assemblies. The device has the technical advantages that by arranging the waste liquid recovery assembly, the walking part and the swing assembly, efficient recovery of waste liquid in the whole spraying period is achieved, and the waste liquid recovery rate gt is achieved through the two-stage mode of standing deep recovery and moving synchronous recovery; 95%; and after spraying is finished, the waste liquid recovery assembly is turned inwards through the swing assembly, full sealing of the spraying cover is achieved, and waste liquid is prevented from making contact with a driving wheel, a bearing and other components.

Description

Technical Field

[0001] This application relates to the field of high-speed wire rod production technology in the steel industry, and in particular to a method and apparatus for waste liquid recovery from coil coating systems. Background Technology

[0002] In the modern steel industry, high-speed wire rod, as an important steel product, is widely used in construction, automobile manufacturing, machinery processing, and many other fields. Its production quality and efficiency directly affect the development of downstream industries. After rolling, the surface of steel coils is prone to oxidation and corrosion due to environmental factors (such as moisture and oxygen in the air). Furthermore, during subsequent storage, transportation, and processing, surface damage may occur due to friction and collisions, all of which seriously affect the quality and performance of the steel coils. Therefore, effective coating treatment of the steel coil surface is particularly important. The PF line (i.e., coil conveyor line) is a crucial conveying equipment connecting the rolling and finishing processes in high-speed wire rod production. The PF line transports steel coils via C-shaped hooks, and the coating process applies a coating to the steel coils on the C-shaped hooks.

[0003] After existing spraying equipment finishes operation, a large amount of unrecovered residual waste liquid remains suspended inside the spray nozzle. This waste liquid not only cannot be effectively recovered, but also spreads to surrounding equipment and instruments, causing pollution. At the same time, due to the obstacle avoidance requirements of the spraying equipment and the C-hook transport route, the equipment must use the traveling mechanism to leave the work area after spraying. If the residual waste liquid is not treated in time, it can easily corrode key components such as the drive wheels and bearings of the traveling mechanism, as well as surrounding equipment and instruments. In addition, although some spraying equipment performs static cleaning of residual waste liquid after repositioning, there is still a risk of waste liquid escaping during the repositioning and movement process. Based on the above problems, there is an urgent need to design a coil spraying system with excellent sealing performance, high waste liquid recovery rate, and low leakage risk to completely solve the series of hidden dangers caused by residual waste liquid. Summary of the Invention

[0004] This device provides a method and apparatus for waste liquid recovery from a coil spraying system, the specific implementation of which is as follows:

[0005] The waste liquid recovery device for the coil spraying system includes:

[0006] The coil conveyor line is equipped with C-shaped hooks for laterally conveying steel coils to the spraying station;

[0007] A spray hood that moves longitudinally along the spraying station is equipped with a spraying component that acts on the steel coil. The top of the spray hood has an axial notch for inserting a C-shaped hook, and a flexible seal that can be opened laterally is provided at the axial notch.

[0008] Several waste liquid recovery components are provided at the opening end of the spray hood. Each waste liquid recovery component is hinged to the spray hood through a swing component, and a gap is left between adjacent waste liquid recovery components for C-shaped hooks to be inserted.

[0009] The waste liquid recovery assembly includes a fan shroud and a fan that are interconnected, with the fan's suction and discharge end connected to a guide pipe.

[0010] Based on the above technical solutions, at least three sets of waste liquid recovery components are symmetrically arranged on both sides of the front end of the spray hood; the flexible seal can be a brush or a rubber pad, and before and after passing through the C-shaped hook, the flexible seal can ensure that most of the spray will not leak out from the position where the C-shaped hook and the spray hood are joined.

[0011] Preferably, the spraying assembly includes an inner spray nozzle axially disposed at the center of the spray hood, an outer ring spray nozzle circumferentially arranged on the outer side of the spray hood, and the output port of the outer ring spray nozzle acts on the inner side of the spray hood.

[0012] Based on the above technical solutions, pressure or centrifugal force is generated by the inner and outer spray nozzles in the form of a spray gun or disc atomizer, which then disperses the coating into uniform and fine droplets and applies them to the surface of the steel coil.

[0013] Preferably, each fan cover is equidistant from the circumference of the spray cover, and the edge of the spray cover is provided with jet nozzles for sealing the gaps between the waste liquid recovery components.

[0014] Preferably, the swing assembly includes a connecting rod seat and a cylinder, the cylinder being connected to the fan cover via a connecting rod structure.

[0015] Preferably, the connecting rod structure includes a first driven rod and a driving rod arranged in parallel and hinged on a connecting rod seat, the output end of the cylinder is connected to the driving rod, and the first driven rod has an elongated hole; the connecting rod structure also includes a second driven rod, which is rotatably connected to the end of the driving rod, one end of the second driven rod is rotatably connected to the fan cover, and the other end of the second driven rod is slidably connected to the elongated hole.

[0016] Based on the above technical solution, a four-bar linkage mechanism driven by a cylinder causes the fan shroud to swing between the inside and outside of the spray shroud. The corrugated pipe flows along the outer shell of the spray shroud to the drain port at the bottom of the traveling part. The fan shroud is conical and is assembled with the fan by flanges and bolts. The front end of the second driven rod of the connecting rod seat is bolted to the flange of the fan shroud, and the tail end of the second driven rod is hinged to the long slot of the first driven rod by a pin and arranged on both sides of the fan. The driving rod of the connecting rod seat is hinged to the cylinder joint by a pin, and the front end of the driving rod of the connecting rod seat is hinged to the second driven rod. The cylinder and its related accessories are arranged at the middle tail end of the connecting rod seat.

[0017] Preferably, it also includes a ground rail and a traveling part located at the spraying station, the traveling part being located at the bottom of the spray hood, and the wheel structure of the traveling part being slidably connected to the ground rail.

[0018] Preferably, the walking unit includes a motor, the output end of which is connected to a drive shaft via a gearbox, and the drive shaft is connected to a ground rail via a drive wheel.

[0019] Preferably, the bottom of the spray nozzle has several partitions along its length.

[0020] Based on the above technical solutions, the tail of the spray hood is extended to the front end of the drive wheel of the traveling part, and the tail of the spray hood is fully enclosed to ensure that it will not interfere with the lifting device during operation. Furthermore, a cross hydraulic rod-shaped height adjustment mechanism can be added to the extended tail of the spray hood, so that the spray hood can be raised relative to the traveling part to accommodate coils of different specifications.

[0021] A method for recycling waste liquid from a coil spraying system includes the following steps:

[0022] S100: After the steel coil is introduced into the C-shaped hook on the coil conveyor line, the spraying system is started.

[0023] S200, the coil conveyor line will laterally transport the C-shaped hooks carrying steel coils to the spraying station and then stop;

[0024] S300, the walking unit drives the spray hood to extend longitudinally until the spray hood completely wraps the steel coil on the C-shaped hook;

[0025] S400, the outer ring nozzle and inner nozzle inside the spray hood are activated to spray the steel coil;

[0026] After the S500 steel coil is coated, let it stand for a period of time to ensure that the coating quality meets the standards.

[0027] S600 After the spraying is completed, the swing assembly is activated to flip down the fan cover, and each waste liquid recovery assembly moves inward and surrounds the end of the spray cover circumferentially.

[0028] The fan in the S700 waste liquid recovery unit starts to extract the remaining suspended waste liquid in the spray hood and discharge it to the outside through the guide pipe.

[0029] S800: After the spray hood has been stationary for the required time, the fan and spray hood will gradually flip outwards via the swing assembly.

[0030] S900: After the spray hood is parallel to the steel coil, the traveling unit drives the spray hood to reverse and reset.

[0031] S1000, the fan is always on during the reverse reset process;

[0032] After S1100 and the spray hood reset, the system stops, the fan stops synchronously, and the coil conveyor sends out the C-hook and steel coil, after which the spraying system enters the next cycle.

[0033] In summary, this application includes the following beneficial technical effects:

[0034] 1. This invention achieves efficient waste liquid recovery throughout the entire spraying cycle (including the trolley movement stage) by setting up a waste liquid recovery component, a walking part, and a swinging component. Through the dual-stage mode of "deep recovery by static setting + synchronous recovery by movement", the waste liquid recovery rate is >95%, which also reduces environmental pollution and production costs and improves production efficiency.

[0035] 2. This invention achieves full enclosure of the spray hood by using a swinging component to invert the waste liquid recovery component after spraying, thus preventing waste liquid from contacting key components such as drive wheels and bearings, reducing the risk of equipment corrosion, and extending the service life of the equipment;

[0036] 3. The present invention has a simple structure. By adding air nozzles at the gaps of each fan cover, an air curtain is formed at the gaps to seal the gaps, which further improves the full sealing effect of the spray cover and reduces the chance of waste liquid escaping. Attached Figure Description

[0037] Figure 1 This is a front view of the structure of the present invention before the steel coil is introduced into the spraying process;

[0038] Figure 2 This is a right-side structural diagram of the present invention before and after the steel coil is introduced into the spraying process;

[0039] Figure 3 This is a front view of the structure of the present invention after the steel coil is introduced into the spraying process;

[0040] Figure 4 This is a schematic diagram of the structure of the spray hood in this invention when the waste liquid recovery component is open. Figure 1 ;

[0041] Figure 5 This is a schematic diagram of the structure of the spray hood in this invention when the waste liquid recovery component is open. Figure 2 ;

[0042] Figure 6 This is a schematic diagram of the structure of the spray hood in this invention when the waste liquid recovery component is closed;

[0043] Figure 7 This is a schematic diagram of the structure of the swing component in this invention. Figure 1 ;

[0044] Figure 8 This is a schematic diagram of the structure of the swing component in this invention. Figure 2 ;

[0045] Figure 9 This is a top view of the structure of the present invention before the steel coil is introduced into the spraying process;

[0046] Figure 10 This is a top view of the structure of the present invention after the steel coil is introduced into the spraying process;

[0047] Figure 11 This is a cross-section of the spray hood structure in this invention. Figure 1 ;

[0048] Figure 12 This is a cross-section of the spray hood structure in this invention. Figure 2 .

[0049] Explanation of reference numerals in the attached figures:

[0050] 1. Frame, 2. C-hook, 3. Coil conveyor, 4. Ground rail, 5. Spray hood, 6. Waste liquid recovery assembly, 7. Walking mechanism, 8. Swing assembly, 9. Inner spray nozzle, 10. Steel coil, 11. Outer ring spray nozzle, 12. Partition.

[0051] 501. Flexible seal; 601. Fan cover; 602. Fan; 603. Guide pipe; 604. Air nozzle; 701. Motor; 702. Drive shaft; 703. Drive wheel; 801. Cylinder; 802. Connecting rod seat; 803. Second driven rod; 804. First driven rod; 805. Driving rod; 806. Long slotted hole. Detailed Implementation

[0052] The specific embodiments of the present invention are described below with reference to the accompanying drawings and examples:

[0053] It should be noted that the structures, proportions, sizes, etc. illustrated in the accompanying drawings of this specification are only used to complement the content disclosed in the specification, so that those skilled in the art can understand and read them, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0054] Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0055] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0056] This application discloses a method and apparatus for recycling waste liquid from a coil spraying system.

[0057] Example 1

[0058] Reference Figures 1 to 12 This embodiment discloses a waste liquid recovery device for a coil spraying system, including a coil conveyor line 3, a ground rail 4 and a traveling part 7 located at the spraying station, a spray hood 5 that moves longitudinally along the spraying station, and a plurality of waste liquid recovery components 6 located at the opening end of the spray hood 5. The coil conveyor line 3 is provided with a C-shaped hook 2 for transversely conveying the steel coil 10 to the spraying station. The spray hood 5 is provided with a spraying component that acts on the steel coil 10. The top of the spray hood 5 is provided with an axial notch for inserting the C-shaped hook 2, and a flexible sealing element 501 that can be opened laterally is provided at the axial notch. Each waste liquid recovery component 6 is hinged to the spray hood 5 by a swing component 8, and a gap is left between adjacent waste liquid recovery components 6 for inserting the C-shaped hook 2.

[0059] The waste liquid recovery assembly 6 includes a fan cover 601 and a fan 602 that are interconnected. The suction and discharge end of the fan 602 is connected to the guide pipe 603. Each fan cover 601 is arranged at equal intervals along the circumference of the spray cover 5, and the edge of the spray cover 5 is provided with a jet nozzle 604 for sealing the gap between the waste liquid recovery assemblies 6.

[0060] The swing assembly 8 includes a connecting rod seat 802 and a cylinder 801. The cylinder 801 is connected to the fan cover 601 via a connecting rod structure. The connecting rod structure includes a first driven rod 804 and a driving rod 805 that are hinged together in parallel on the connecting rod seat 802. The output end of the cylinder 801 is connected to the driving rod 805. The first driven rod 804 has an elongated hole 806. The connecting rod structure also includes a second driven rod 803. The second driven rod 803 is rotatably connected to the end of the driving rod 805. One end of the second driven rod 803 is rotatably connected to the fan cover 601, and the other end of the second driven rod 803 is slidably connected to the elongated hole 806.

[0061] Example 2

[0062] Reference Figures 1 to 12Based on the above embodiments, this embodiment also discloses a waste liquid recovery device for a coil spraying system. The walking part 7 is located at the bottom of the spray hood 5, and the wheel structure of the walking part 7 is slidably connected to the ground rail 4. In this structure, the walking part 7 includes a motor 701, the output end of which is connected to a drive shaft 702 through a gearbox. The two ends of the drive shaft 702 are connected to the ground rail 4 through drive wheels 703. The spraying assembly includes an inner spray nozzle 9 axially located at the center of the spray hood 5. The bottom of the spray hood 5 is provided with several partitions 12 along its length. The outer ring spray nozzles 11 are arranged circumferentially on the outer side of the spray hood 5, and the output port of the outer ring spray nozzles 11 acts on the inner side of the spray hood 5. In this structure, the outer ring spray nozzles 11 act on the outer circumferential surface of the steel coil 10, and the inner spray nozzles 9 act on the inner circumferential surface of the steel coil 10. The partitions 12 are used to prevent waste liquid that may remain or has not been cleaned up at the bottom of the spray hood 5 from overflowing directly during the process of the walking part 7 driving the spray hood 5.

[0063] Example 3

[0064] Reference Figures 1 to 12 Based on the above embodiments, this embodiment also discloses a waste liquid recovery method for a coil coating system, which includes the following steps:

[0065] After S100 and steel coil 10 are fed into the C-shaped hook 2 on the coil conveyor line 3, the spraying system is started.

[0066] S200, the coil conveyor 3 will laterally convey the C-shaped hook 2 carrying the steel coil 10 to the spraying station and then stop;

[0067] S300, the walking unit 7 drives the spray hood 5 to extend longitudinally until the spray hood 5 completely wraps the steel coil 10 on the C-shaped hook 2;

[0068] S400, the outer ring spray nozzle 11 and inner spray nozzle 9 inside the spray hood 5 are activated to spray the steel coil 10.

[0069] After S500 and steel coil 10 are sprayed, let them stand for a period of time to ensure that the spraying quality meets the standards.

[0070] S600. After the spraying is completed, the swing assembly 8 is activated to flip down the fan cover 601, and each waste liquid recovery assembly 6 wraps around the end of the spray cover 5 inward along the circumference.

[0071] S700, the blower 602 in the waste liquid recovery component 6 is started to extract the remaining suspended waste liquid in the spray hood 5 and discharge it to the outside through the guide pipe 603.

[0072] S800, after the spray hood 5 has been in place for a certain period of time, the fan 602 and the spray hood 5 are gradually flipped outward by the swing assembly 8;

[0073] After the S900 spray hood 5 is parallel to the steel coil 10, the traveling part 7 drives the spray hood 5 to reverse and reset.

[0074] S1000, during the reverse reset process, the fan 602 is always in the open state;

[0075] After S1100 and spray hood 5 are reset and stopped, fan 602 stops synchronously. After coil conveyor line 3 sends out C-shaped hook 2 and steel coil 10, the spraying system enters the next cycle.

[0076] Many other changes and modifications can be made without departing from the concept and scope of this invention. It should be understood that this invention is not limited to the specific embodiments, and the scope of this invention is defined by the appended claims.

Claims

1. A method for recovering waste liquid from a coil spraying system, characterized in that, Includes the following steps: S100, after the steel coil (10) is fed into the C-shaped hook (2) on the coil conveyor line (3), the spraying system is started; S200, the coil conveyor line (3) will laterally convey the C-shaped hook (2) carrying the steel coil (10) to the spraying station and then stop; S300, the walking part (7) drives the spray hood (5) to extend longitudinally until the spray hood (5) completely wraps the steel coil (10) on the C-shaped hook (2); S400, the outer ring spray nozzle (11) and inner spray nozzle (9) inside the spray hood (5) are activated to spray the steel coil (10); S500. After the steel coil (10) is sprayed, it is left to stand for a period of time to ensure that the spraying quality meets the standards. S600. After the spraying is completed, the swing assembly (8) is activated to flip down the fan cover (601), and each waste liquid recovery assembly (6) wraps around the end of the spray cover (5) inward along the circumferential direction. S700, the blower (602) in the waste liquid recovery component (6) is started to extract the remaining suspended waste liquid in the spray hood (5) and discharge it to the outside through the guide pipe (603); S800, after the spray hood (5) has been in place for a certain period of time, the fan (602) and the spray hood (5) are gradually turned outward by the swing assembly (8); S900, after the spray hood (5) is parallel to the steel coil (10), the walking part (7) drives the spray hood (5) to reverse and reset; S1000 During the reverse reset process, the fan (602) is always in the on state; S1100, the spray hood (5) is reset and stopped, the fan (602) stops synchronously, and after the coil conveyor line (3) sends out the C-shaped hook (2) and the steel coil (10), the spraying system enters the next cycle.

2. A waste liquid recovery device for a coil spraying system, characterized in that, include: A coil conveyor line (3) is provided with C-shaped hooks (2) for transversely conveying steel coils (10) to the spraying station; A spray hood (5) moves longitudinally along the spraying station. The spray hood (5) is equipped with a spraying component that acts on the steel coil (10). The top of the spray hood (5) has an axial notch for inserting the C-shaped hook (2), and a flexible seal (501) that can be opened laterally is provided at the axial notch. A plurality of waste liquid recovery components (6) are provided at the opening end of the spray hood (5). Each waste liquid recovery component (6) is hinged to the spray hood (5) by a swing component (8), and a gap is left between adjacent waste liquid recovery components (6) for the C-shaped hook (2) to be inserted. The waste liquid recovery assembly (6) includes a fan shroud (601) and a fan (602) that are interconnected, and the suction outlet of the fan (602) is connected to the external guide pipe (603).

3. The waste liquid recovery device for the coil spraying system according to claim 2, characterized in that, Each of the fan covers (601) is arranged at equal intervals along the circumference of the spray cover (5), and the edge of the spray cover (5) is provided with a jet nozzle (604) for sealing the gap between the waste liquid recovery components (6).

4. The waste liquid recovery device for the coil spraying system according to claim 3, characterized in that, The swing assembly (8) includes a connecting rod seat (802) and a cylinder (801), the cylinder (801) being connected to the fan cover (601) via a connecting rod structure.

5. The waste liquid recovery device for the coil spraying system according to claim 4, characterized in that, The linkage structure includes a first driven rod (804) and a driving rod (805) that are hinged together in parallel on the linkage seat (802). The output end of the cylinder (801) is connected to the driving rod (805). The first driven rod (804) has an elongated hole (806). The linkage structure also includes a second driven rod (803), which is rotatably connected to the end of the driving rod (805). One end of the second driven rod (803) is rotatably connected to the fan cover (601), and the other end of the second driven rod (803) is slidably connected to the elongated slot (806).

6. The waste liquid recovery device for the coil spraying system according to claim 2, characterized in that, It also includes a ground rail (4) and a traveling part (7) located at the spraying station. The traveling part (7) is located at the bottom of the spray hood (5), and the wheel structure of the traveling part (7) is slidably connected to the ground rail (4).

7. The waste liquid recovery device for the coil spraying system according to claim 6, characterized in that, The walking unit (7) includes a motor (701), the output end of which is connected to a drive shaft (702) via a gearbox, and the two ends of the drive shaft (702) are connected to the ground rail (4) via drive wheels (703).

8. The waste liquid recovery device for the coil spraying system according to claim 2, characterized in that, The bottom of the spray hood (5) is provided with several partitions (12) along its length.

9. The waste liquid recovery device for the coil spraying system according to claim 2, characterized in that, The spraying assembly includes an inner spray nozzle (9) axially disposed at the center of the spray hood (5), and an outer ring spray nozzle (11) circumferentially arranged on the outer side of the spray hood (5), with the output port of the outer ring spray nozzle (11) acting on the inner side of the spray hood (5).

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