CN219752402U - Air knife baffle plate of hot galvanizing unit - Google Patents
Air knife baffle plate of hot galvanizing unit Download PDFInfo
- Publication number
- CN219752402U CN219752402U CN202320555089.2U CN202320555089U CN219752402U CN 219752402 U CN219752402 U CN 219752402U CN 202320555089 U CN202320555089 U CN 202320555089U CN 219752402 U CN219752402 U CN 219752402U
- Authority
- CN
- China
- Prior art keywords
- air knife
- baffle
- strip steel
- baffle body
- hot galvanizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000005246 galvanizing Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 35
- 239000010959 steel Substances 0.000 claims abstract description 35
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 230000007704 transition Effects 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 24
- 239000011701 zinc Substances 0.000 abstract description 24
- 229910052725 zinc Inorganic materials 0.000 abstract description 24
- 239000002893 slag Substances 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 8
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- -1 and meanwhile Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Abstract
The utility model relates to an air knife baffle of a hot galvanizing unit, which is arranged on an air knife and comprises a baffle body, wherein the bottom angle of the baffle body, which is close to the side of strip steel, is a curve shape with a middle bulge and concave two sides; the surface of the baffle body is sprayed with a tungsten carbide coating. The advantages are that: the structure is more reasonable, the bottom angle of the baffle body close to the strip steel side is in a curve shape with concave two sides of the middle bulge, the airflow vortex flow direction of the air knife and the strip steel part is changed while the airflow of the air knife and the strip steel part is blocked, so that the airflow vortex flow direction is dispersed, the defects of edge thickness, slag formation, zinc flow lines, zinc fluctuation and the like caused by vortex flow are avoided at the edge part of the strip steel, and the thickness of a galvanized layer at the edge part of the strip steel is effectively controlled.
Description
Technical Field
The utility model belongs to air knife auxiliary equipment of a hot galvanizing unit, and particularly relates to an air knife baffle of the hot galvanizing unit.
Background
The air knife equipment is an important equipment for controlling the thickness and the surface quality of zinc layers in the production process of a hot galvanizing unit at present. When the strip steel reaches the air knife device after hot galvanizing is carried out by the zinc liquid in the zinc pot, nitrogen is blown out by the air knife through the knife lip, the zinc liquid on the surface of the strip steel is blown out, and redundant zinc liquid on the surface of the strip steel is scraped off, so that the zinc layer on the surface of the strip steel is uniform. However, in actual production, the edge of the strip steel is provided with air knife baffles at two sides of the air knife to solve the problems due to the defects of edge thickness, slag formation, zinc flow lines, zinc fluctuation and the like caused by vortex. In the prior art, patent application number: CN202122671273.7 discloses an edge baffle for hot galvanizing air knife, which adopts hanging mode to fix baffle body, and sets up air current wind guiding groove on one side of baffle body near strip steel, and through the air current collision of air knife and strip steel part is blocked to the wind guiding groove, reduces the noise that it produced, also avoids the strip steel edge to be thick because of the limit that the vortex produced simultaneously. However, the air flow guide groove with the arc-shaped groove structure can reduce the edge thickness in the actual production process, and the defects of the edge thickness and zinc flow lines still occur.
The air knife baffle is used in a long-term high-temperature state, and has a great influence on the baffle. The thickness range of the conventional air knife baffle plate is 0.5mm plus or minus 0.1mm. The air knife baffle works within the range of 200-500mm above the zinc pot for a long time, and the temperature of the zinc pot of the hot galvanizing production line is generally controlled within the range of 450+/-10 ℃. Therefore, the air knife baffle is in a high-temperature working environment for a long time, so that the air knife baffle is easy to deform.
Disclosure of Invention
The utility model aims to provide an air knife baffle of a hot galvanizing unit, optimize the structure of the air knife baffle, better reduce the defects of zinc slag condensation, edge thickness, zinc flow lines, zinc fluctuation and the like caused by gas vortex at the edge of strip steel, and prolong the service life of the air knife baffle.
In order to achieve the above purpose, the present utility model is realized by the following technical scheme:
the air knife baffle of the hot galvanizing unit is arranged on an air knife and comprises a baffle body, wherein the bottom angle of the baffle body, which is close to the strip steel side, is a curve shape with concave middle bulges at two sides; the surface of the baffle body is sprayed with a tungsten carbide coating.
The thickness of the tungsten carbide coating is 100-200 mu m.
The bottom angle of the baffle body consists of three transition circular arcs.
The baffle plate also comprises a clamping plate, a positioning block and a hanging part, wherein the baffle plate body is fixedly connected with the clamping plate, the top of the clamping plate is fixedly connected with the positioning block, the bottom of the hanging part is fixedly connected with the positioning block, and the hanging part is fixedly connected with the air knife.
The clamping plate is transversely provided with a plurality of long holes, and the clamping plate is fixedly connected with the baffle body through the long holes and bolts.
The surface roughness Ra of the bottom of the baffle body is below 3.2.
Compared with the prior art, the utility model has the beneficial effects that:
1. the air knife baffle plate structure of the hot galvanizing unit is more reasonable, the bottom angle of the baffle plate body close to the strip steel side is in a curve shape with concave middle protrusions and concave two sides, the air knife and the air flow of the strip steel part are blocked, the airflow vortex flow direction is changed, the airflow vortex flow direction is dispersed, the defects of edge thickness, slag formation, zinc flow lines, zinc fluctuation and the like caused by vortex flow are avoided at the edge of the strip steel, and the thickness of a galvanized layer at the edge of the strip steel is effectively controlled.
2. The tungsten carbide coating is sprayed on the surface of the baffle body to protect the baffle body, so that the deformation phenomenon is reduced, the tungsten carbide coating is high in hardness and good in wear resistance, the service life of the air knife baffle is prolonged, and the use cost is reduced. Compared with the whole baffle body material replacement, the material cost and the processing cost are saved.
3. The bottom of the baffle body adopts a smoother structure, particularly adopts a curved base angle part to adopt a smooth structure, after the baffle body is contacted with strip steel, gas vortex can not be generated at the contact position of the bottom of the baffle body and the strip steel, and meanwhile, zinc slag coagulation phenomenon can not be generated.
Drawings
Fig. 1 is a schematic view of the installation location of the present utility model.
Fig. 2 is a schematic structural view of the present utility model.
FIG. 3 is a schematic diagram showing the relative positions of the present utility model and a strip steel.
Fig. 4 is a front view of the present utility model.
Fig. 5 is a side view of the present utility model.
FIG. 6 is a schematic diagram showing the relative positions of the present utility model and a strip steel.
In the figure: 1-an air knife 2-strip steel 3-an air knife baffle 4-a handle 5-a hanging part 6-a positioning block 7-a clamping plate 8-a baffle body 9-a base angle.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1-3, an air knife baffle plate 3 of a hot galvanizing unit is arranged on two air knives 1, the air knife baffle plate 3 can be directly and fixedly connected with the air knives 1 (a frame body for supporting the air knives 1), the air knife baffle plate 3 comprises a baffle plate body 8, a clamping plate 7, a positioning block 6 and a hanging part 5, the baffle plate body 8 is fixed on the clamping plate 7, the top of the clamping plate 7 is fixedly connected with the positioning block 6, the bottom of the hanging part 5 is fixedly connected with the positioning block 6, and the hanging part 5 is fixedly connected with the air knives 1. The bottom corners 9 of the baffle body 8, which are close to the strip steel 2, are curved with concave middle protrusions and concave two sides, and the air flow is split under the action of the bottom corners 9 from bottom to top, so that the impact of the air flow on the strip steel 2 is weakened; the surface of the baffle body 8 is sprayed with a tungsten carbide coating. The bottom of the baffle body 8 is smooth, and the surface roughness Ra is 3.2 or less.
Example 2
Referring to fig. 4-6, the bottom corner 9 of the baffle body 8 is formed by three transition arcs, the middle arc is convex towards the strip steel 2, the arcs on two sides are concave towards the center of the baffle body 8, the bottom corner 9 is smooth, and the surface roughness Ra is below 1.6. The bottom angle 9 adopts a curve structure, the air flow is split, and after the baffle body 8 and the edge of the strip steel 2 are at a position 3-10mm away, the air flow cannot impact the strip steel 2 after being dispersed, gas vortex can not be generated between the bottom of the baffle body 8 and the strip steel 2, the edge thickness phenomenon can not occur, the zinc slag coagulation phenomenon can not occur, and the zinc slag defect can be effectively reduced. The zinc slag defect does not appear any more when the novel air knife baffle 3 is put on the machine for 1 year at present.
Example 3
This example is substantially the same as example 1, except that the tungsten carbide coating layer has a thickness of 100 to 200 μm. Tungsten powder with the average particle size of 3-5 mu m and carbon black with the same amount of substances are dry mixed by a ball mill, heated in a graphite resistance furnace or an induction furnace to obtain WC with uniform particle size, and then sprayed with tungsten carbide by supersonic flame to obtain a tungsten carbide coating, so that the surface of the baffle body 8 is fully protected, the heat-resistant temperature of the tungsten carbide coating is above 600 ℃, the use condition of the air knife baffle 3 is completely met, and the flatness of the air knife baffle 3 can be effectively ensured.
Example 4
The present embodiment is substantially the same as embodiment 1, and for convenient fine adjustment of the position of the baffle body 8, see fig. 1 to 5, a plurality of long holes are transversely opened on the clamping plate 7, the clamping plate 7 is fixedly connected with the baffle body 8 through the long holes and bolts, and the distance between the baffle body 8 and the strip steel 2 can be adjusted by adopting the long holes. The upper edge of the baffle body 8 is abutted against the lower edge of the positioning block 6, so that the transverse position of the baffle body 8 is adjusted on site without influencing the longitudinal position of the baffle body 8.
In addition, for convenient dismantlement, handle 4 is connected at suspension element 5 top, conveniently takes and changes air knife baffle 3, and suspension element 5 vertically opens there are two holes, and suspension element 5 is connected with air knife 1 (or the support body that supports air knife 1) through the round pin axle, plays fixed effect in location, see fig. 4, fig. 5.
The utility model improves the service life of the air knife baffle plate 3, can better reduce zinc slag condensation caused by air vortex at the edge of the strip steel 2, and effectively controls the thickness of a galvanized layer at the edge of the strip steel 2. Meanwhile, the generation probability of zinc layer defects is reduced, the manufacturing and spare part cost is reduced, and the product qualification rate is improved.
The technical principle of the present utility model is described above in connection with the specific embodiments. These descriptions are meant only to illustrate the principles of the utility model; and should not be construed as limiting the scope of the utility model in any way. Based on the explanation herein; other embodiments of the present utility model will occur to those skilled in the art without the need for inventive effort; all of which fall within the scope of the present utility model.
Claims (6)
1. The air knife baffle of the hot galvanizing unit is arranged on an air knife and is characterized by comprising a baffle body, wherein the bottom angle of the baffle body, which is close to the strip steel side, is a curve shape with middle bulges and concave two sides; the surface of the baffle body is sprayed with a tungsten carbide coating.
2. The air knife baffle of a hot galvanizing unit according to claim 1, wherein the thickness of the tungsten carbide coating is 100-200 μm.
3. The air knife baffle of a hot galvanizing unit according to claim 1, wherein the bottom angle of the baffle body is composed of three transition arcs.
4. The air knife baffle of the hot galvanizing unit according to claim 1, further comprising a clamping plate, a positioning block and a hanging part, wherein the baffle body is fixedly connected with the clamping plate, the top of the clamping plate is fixedly connected with the positioning block, the bottom of the hanging part is fixedly connected with the positioning block, and the hanging part is fixedly connected with the air knife.
5. The air knife baffle of hot galvanizing unit according to claim 4, wherein the clamping plate is transversely provided with a plurality of long holes, and the clamping plate is fixedly connected with the baffle body through the long holes and bolts.
6. The air knife baffle of a hot galvanizing unit according to claim 1, wherein the roughness Ra of the bottom surface of the baffle body is below 3.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320555089.2U CN219752402U (en) | 2023-03-21 | 2023-03-21 | Air knife baffle plate of hot galvanizing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320555089.2U CN219752402U (en) | 2023-03-21 | 2023-03-21 | Air knife baffle plate of hot galvanizing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219752402U true CN219752402U (en) | 2023-09-26 |
Family
ID=88091000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320555089.2U Active CN219752402U (en) | 2023-03-21 | 2023-03-21 | Air knife baffle plate of hot galvanizing unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219752402U (en) |
-
2023
- 2023-03-21 CN CN202320555089.2U patent/CN219752402U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |