A gas knife device for a galvanizing line

Abstract

The application discloses a galvanizing line air knife device and belongs to the technical field of air knives.The air knife device comprises a ring-shaped air knife shell, a base mounted on the ring-shaped air knife shell, a gas guide cavity formed in the ring-shaped air knife shell, a first gas connection end and a second gas connection end oppositely arranged on the ring-shaped air knife shell, a gas guide hose connected between the first gas connection end and the second gas connection end, a gas outlet ring arranged on the inner side of the ring-shaped air knife shell, and an adjusting mechanism arranged in the gas guide cavity of the ring-shaped air knife shell.The adjusting mechanism comprises a fixing ring arranged in the gas guide cavity of the ring-shaped air knife shell.The size of the air knife air port can be quickly adjusted according to the thickness and running speed of the galvanized plate, for example, the air flow pressure is reduced when processing thin plates to avoid blowing the plates, and the pressure is increased when processing thick plates to ensure that the thickness of the zinc layer meets the standards.Compared with a traditional single-structure air knife, the size of the air port can be flexibly adjusted, the air knife can be adapted to galvanized plates with different thicknesses and running speeds, and the universality of the equipment is improved.

Description

Technical Field

[0001] This application relates to the field of air knife technology, specifically an air knife device for galvanized lines. Background Technology

[0002] During the galvanizing process, the main function of the air knife device is to blow away excess zinc liquid from the surface of the steel strip to ensure the quality of the coating.

[0003] However, existing annular air knife devices typically employ a single ventilation structure with a fixed air inlet position, making effective adjustment impossible. This design flaw has caused some significant problems during production, particularly when the galvanizing line speed changes. The air pressure and speed of the air knife device cannot match the speed of the galvanizing line, resulting in unstable coating quality.

[0004] When the production line enters the high-speed section, the fixed structure of the airflow cannot be adjusted, and the airflow pressure often cannot meet the purging requirements, resulting in an increase in the residual amount of zinc liquid, which in turn forms zinc nodules or excessively thick coatings, seriously affecting the smoothness and quality of the steel strip surface. At low speeds, the airflow velocity at the fixed air inlet is too strong, which may have an adverse effect on the unsolidified zinc layer, resulting in a rough surface or localized exposed iron, further affecting the uniformity and appearance quality of the coating.

[0005] Therefore, this application provides an air knife device for galvanizing lines to solve the above-mentioned problems. Utility Model Content

[0006] This application provides an air knife device for galvanizing lines, which aims to solve the problem that the airflow pressure and speed of the air knife device proposed in the background art cannot match the speed of the galvanizing line, resulting in unstable coating quality.

[0007] To achieve the above objectives, this application provides the following technical solution: a galvanizing line air knife device, comprising an annular air knife housing and a base mounted on the annular air knife housing, wherein an air guiding cavity is provided inside the annular air knife housing, and a first air receiving end and a second air receiving end are arranged opposite to each other on the annular air knife housing, the first air receiving end and the second air receiving end are connected by an air guiding hose, and an air outlet ring is provided on the inner side of the annular air knife housing;

[0008] An adjustment mechanism is provided inside the annular air knife housing;

[0009] The adjustment mechanism includes a fixed ring disposed within the air guide cavity of the annular air knife housing. The side of the fixed ring away from the annular air knife housing is fixedly connected to the base. A movable ring is inserted through the annular air knife housing. A pointer is symmetrically installed on one end of the movable ring extending out of the annular air knife housing. A first vent hole is opened on the fixed ring, and a second vent hole is opened on the movable ring. The airflow is adjusted by the overlapping area of ​​the vent holes to meet the requirements of different galvanizing processes for the air knife blowing force.

[0010] Preferably, the first vent hole and the second vent hole have the same specifications, and the movable ring is sleeved outside the fixed ring to ensure that when the movable ring is rotated, the two holes can completely overlap or completely misalign, so as to realize the linear adjustment of the airflow from the maximum to the minimum. When the two holes completely overlap, the airflow is the maximum. As the movable ring rotates, the overlapping area decreases and the airflow decreases.

[0011] Preferably, a limiting ring groove is provided on the base, and one end of the movable ring is rotatably connected to the limiting ring groove, so that the movable ring can be flexibly adjusted to change the overlapping area of ​​the vent holes.

[0012] Preferably, the annular air knife housing is provided with a scale dial, and a lever is fixedly installed on the pointer.

[0013] Preferably, an I-beam is fixedly mounted on the movable ring, the pointer is sleeved on the I-beam, a threaded rod is fixedly mounted on the I-beam, and the lever is threadedly sleeved on the threaded rod.

[0014] This air knife device can quickly adjust the size of the air knife nozzle according to parameters such as the thickness of the galvanized sheet and the running speed. For example, when processing thin sheets, the air pressure can be reduced to avoid damaging the sheet, while when processing thick sheets, the pressure can be increased to ensure that the zinc layer thickness meets the standard. Compared with traditional single-structure air knives, the size of the nozzle can be flexibly adjusted, so that the air knife can be adapted to galvanized sheets of different thicknesses and running speeds, thus improving the versatility of the equipment.

[0015] This air knife device uses a scale dial on the annular air knife housing. Operators can visually obtain the current airflow adjustment status by observing the position of the pointer on the scale dial. The lever is used to manually move the pointer, which drives the movable ring to rotate, thereby realizing the adjustment operation and making the air outlet adjustment more precise. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a galvanizing line air knife device.

[0017] Figure 2 This is a schematic diagram of the structure of the movable ring;

[0018] Figure 3 This is a schematic diagram of the fixed ring structure;

[0019] Figure 4 This is a schematic diagram of the structure of the back of the air vent ring;

[0020] Figure 5 for Figure 1 Enlarged structural diagram at point A in the middle.

[0021] In the picture:

[0022] 1. Annular air knife housing; 2. Base; 21. Limiting ring groove; 3. Air guide hose; 31. First air inlet end; 32. Second air inlet end; 4. Air outlet ring; 5. Adjustment mechanism; 51. Fixed ring; 511. First air vent; 52. Movable ring; 521. Second air vent; 53. Scale dial; 54. Pointer; 55. Lever. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] This embodiment provides an air knife device for galvanizing lines, such as... Figure 1-5 As shown, the air knife device includes an annular air knife housing 1 and a base 2 mounted on the annular air knife housing 1. An air guiding cavity is provided inside the annular air knife housing 1. A first air receiving end 31 and a second air receiving end 32 are arranged opposite to each other on the annular air knife housing 1. The first air receiving end 31 and the second air receiving end 32 are connected by an air guiding hose 3. An air outlet ring 4 is provided on the inner side of the annular air knife housing 1.

[0025] An adjustment mechanism 5 is provided inside the annular air knife housing 1;

[0026] The adjustment mechanism 5 includes a fixed ring 51 disposed in the air guide cavity of the annular air knife housing 1. The fixed ring 51 is fixedly connected to the base 2 on the side away from the annular air knife housing 1. A movable ring 52 is inserted through the annular air knife housing 1. A pointer 54 is symmetrically installed on one end of the movable ring 52 extending out of the annular air knife housing 1. A first vent hole 511 is opened on the fixed ring 51, and a second vent hole 521 is opened on the movable ring 52.

[0027] Specifically, compressed air or other gas enters from the first air inlet 31, flows through the air guide hose 3 to the second air inlet 32, and is simultaneously discharged into the air guide cavity of the annular air knife housing 1 from the first air inlet 31 and the second air inlet 32. Finally, it is ejected through the air outlet ring 4 to form an air curtain. In the adjustment mechanism 5, the fixed ring 51 is fixed to the base 2, and the movable ring 52 can rotate relative to the annular air knife housing 1. When the movable ring 52 is rotated, the overlapping area of ​​the second air vent 521 on it and the first air vent 511 of the fixed ring 51 changes, thereby adjusting the airflow and controlling the airflow size and pressure of the air outlet ring 4. Thus, the corresponding overlapping surface is adjusted according to the transmission speed of the galvanizing line, thereby adjusting the airflow.

[0028] The first vent 511 and the second vent 521 have the same specifications, and the movable ring 52 is sleeved on the outside of the fixed ring 51.

[0029] More specifically, the first vent 511 and the second vent 521 are both rectangular, and there are 12 of them, which are evenly distributed on the fixed ring 51 and the movable ring 52. When the movable ring 52 is not rotated for adjustment, the ventilation areas of the first vent 511 and the second vent 521 overlap. The movable ring 52 is sleeved on the outside of the fixed ring 51, and a sealing rubber ring is set at the gap to avoid pressure leakage during rotation.

[0030] A limiting ring groove 21 is provided on the base 2, and one end of the movable ring 52 is rotatably connected to the limiting ring groove 21.

[0031] Furthermore, one end of the movable ring 52 is embedded in the limiting ring groove 21 of the base 2. The limiting ring groove 21 plays a radial limiting role on the movable ring 52, so that it can only rotate around the axis of the annular air knife housing 1, avoiding shaking or deviation, and ensuring the stability of the adjustment process.

[0032] A scale dial 53 is provided on the annular air knife housing 1, and a lever 55 is fixedly installed on the pointer 54.

[0033] It should be noted that the scale dial 53 is fixed on the annular air knife housing 1, and the pointer 54 moves with the rotation of the movable ring 52. The operator can intuitively obtain the current airflow adjustment status by observing the position of the pointer 54 on the scale dial 53. The lever 55 is used to manually move the pointer 54, which drives the movable ring 52 to rotate, thereby realizing the adjustment operation.

[0034] An I-beam is fixedly installed on the movable ring 52, the pointer 54 is sleeved with the I-beam, a threaded rod is fixedly installed on the I-beam, and the lever 55 is threadedly sleeved with the threaded rod.

[0035] It is worth mentioning that the I-beam on the movable ring 52 provides a support for the pointer 54, allowing it to move along the axial direction of the I-beam for easy installation and disassembly. The threaded rod is fixed on the I-beam, and the lever 55 is threadedly connected to the threaded rod. When the movable ring 52 is rotated to the designated position, the lever 55 can be manually rotated to bring it closer to the pointer 54 along the axial direction of the threaded rod. Finally, the pointer 54 is held in place against the surface of the annular air knife housing 1 to keep the movable ring 52 fixed, preventing the movable ring 52 from moving after adjustment.

[0036] In use, the fixed ring 51 is fixed to the base 2, and the movable ring 52 can rotate relative to the annular air knife housing 1. When the movable ring 52 is rotated, the overlapping area of ​​the second vent hole 521 on it and the first vent hole 511 of the fixed ring 51 changes, thereby adjusting the airflow and controlling the airflow size and pressure of the air outlet ring 4. The corresponding overlapping surface is adjusted according to the transmission speed of the galvanizing line, thereby adjusting the airflow.

[0037] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A galvanizing line air knife device, comprising an annular air knife housing (1) and a base (2) mounted on the annular air knife housing (1), wherein an air guiding cavity is provided inside the annular air knife housing (1), and a first air receiving end (31) and a second air receiving end (32) are arranged opposite to each other on the annular air knife housing (1), the first air receiving end (31) and the second air receiving end (32) are connected by an air guiding hose (3), and an air outlet ring (4) is provided on the inner side of the annular air knife housing (1); Its features are: An adjustment mechanism (5) is provided inside the annular air knife housing (1); The adjustment mechanism (5) includes a fixed ring (51) disposed in the air guide cavity of the annular air knife housing (1). The fixed ring (51) is fixedly connected to the base (2) on the side away from the annular air knife housing (1). A movable ring (52) is inserted on the annular air knife housing (1). A pointer (54) is symmetrically installed on one end of the movable ring (52) extending out of the annular air knife housing (1). A first vent hole (511) is opened on the fixed ring (51), and a second vent hole (521) is opened on the movable ring (52).

2. The air knife device for galvanizing lines according to claim 1, characterized in that: The first vent (511) and the second vent (521) have the same specifications, and the movable ring (52) is sleeved on the outside of the fixed ring (51).

3. The air knife device for galvanizing lines according to claim 2, characterized in that... A limiting ring groove (21) is provided on the base (2), and one end of the movable ring (52) is rotatably connected to the limiting ring groove (21).

4. The air knife device for galvanizing lines according to claim 1, characterized in that: The annular air knife housing (1) is provided with a scale dial (53), and a lever (55) is fixedly installed on the pointer (54).

5. The air knife device for galvanizing lines according to claim 4, characterized in that: An I-beam is fixedly installed on the movable ring (52), the pointer (54) is sleeved with the I-beam, a threaded rod is fixedly installed on the I-beam, and the lever (55) is threadedly sleeved with the threaded rod.

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