CN219670618U - Nitrogen protection system for coating - Google Patents
Nitrogen protection system for coating Download PDFInfo
- Publication number
- CN219670618U CN219670618U CN202320350621.7U CN202320350621U CN219670618U CN 219670618 U CN219670618 U CN 219670618U CN 202320350621 U CN202320350621 U CN 202320350621U CN 219670618 U CN219670618 U CN 219670618U
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- baffle
- module
- knife
- nitrogen protection
- 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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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 37
- 238000000576 coating method Methods 0.000 title claims abstract description 22
- 239000011248 coating agent Substances 0.000 title claims abstract description 19
- 238000007747 plating Methods 0.000 claims abstract description 52
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 34
- 229910010293 ceramic material Inorganic materials 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 20
- 239000010959 steel Substances 0.000 abstract description 20
- 230000003647 oxidation Effects 0.000 abstract description 11
- 238000007254 oxidation reaction Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 6
- 230000001681 protective effect Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract description 2
- 229910052725 zinc Inorganic materials 0.000 abstract description 2
- 239000011701 zinc Substances 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 abstract 1
- 238000010408 sweeping Methods 0.000 abstract 1
- -1 zinc-aluminum-magnesium Chemical compound 0.000 description 7
- 239000002893 slag Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Abstract
The utility model relates to a nitrogen protection system for coating, and belongs to the field of cooling after strip steel coating. The nitrogen knife device comprises a nitrogen knife module and baffle modules arranged on two sides of the nitrogen knife module, wherein the baffle modules and the nitrogen knife module form a sealing structure; the end part of the baffle plate module is connected with a servo motor and a lifting mechanism, and the servo motor is used for driving the lifting mechanism to drive the baffle plate module to move along the direction approaching to or far from the plating solution pond. And forming a protective cover on the surface of the plating solution tank in the plating process, and creating a protective atmosphere to prevent oxidation of the liquid surface of the plating solution tank and oxidation after metal plating. The baffle plate module can be lifted in the deslagging process, and the gas blown out by the air knife module flows outwards to form a liquid level sweeping effect so as to blow out the scum on the liquid level from the nitrogen protection cover. The utility model can effectively solve the problems of nitrogen protection, scum being sucked to the surface of strip steel and the like in the plating area, and eliminate the defects of zinc, aluminum and magnesium plating.
Description
Technical Field
The utility model belongs to the field of cooling after strip steel plating, and relates to a nitrogen protection system for coating.
Background
In recent years, zinc-aluminum-magnesium plating has been developed to a great extent, and in some fields, there is a trend to replace the conventional hot galvanizing, and the change of the coating causes a great change in the equipment of the plating unit, wherein the conventional air knife is being replaced by a nitrogen air knife, so as to prevent oxidation of the metal plating layer or the plating solution and prevent surface defects in the plating area.
However, the surface defect of the zinc-aluminum-magnesium coating cannot be thoroughly eliminated by adopting a nitrogen air knife only because the zinc-aluminum-magnesium coating has specificity. The reason for this is that: the simple nitrogen gas knife can not completely seal the surface of the plating solution tank, the surface of the plating solution still contacts with air under the boiling state to oxidize, magnesium oxide in the product is easy to stay on the surface of the plating solution tank to form scum because of small density, the scum is easy to adhere to the surface of a strip steel plating layer under the entrainment effect of strip steel high-speed motion on the liquid level, and MgO in the scum is easy to cause defects such as black spots and the like on the surface of the plating layer.
Therefore, it is necessary to provide a coating method, which forms a sealed environment during the coating process and is cooled rapidly, so as to reduce oxidation of the plating solution during and after the coating process, and further avoid the defect of black spots on the surface of the strip steel coating.
Disclosure of Invention
In view of the above, the utility model aims to provide a nitrogen protection system for coating, which effectively solves the problems of nitrogen protection in a coating area, entrainment of scum on the surface of strip steel and the like, and eliminates zinc-aluminum-magnesium coating defects.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the nitrogen protection system for coating comprises a nitrogen gas knife module and baffle plate modules arranged on two sides of the nitrogen gas knife module, wherein the baffle plate modules and the nitrogen gas knife module form a sealing structure; the end part of the baffle plate module is connected with a servo motor and a lifting mechanism, and the servo motor is used for driving the lifting mechanism to drive the baffle plate module to move along the direction approaching to or far from the plating solution pond.
Optionally, the nitrogen gas knife module comprises two nitrogen gas knives which are respectively arranged at two sides of the metal to be coated.
Optionally, the nitrogen gas air knife module is arranged on the knife rest.
Optionally, the nitrogen gas air knives are all arranged on the knife rest, and an air inlet channel is formed between the two knife rests which are oppositely arranged.
Optionally, the tool rest is connected to the baffle module.
Optionally, the baffle module includes a fixed baffle connected to the tool rest and a sealing baffle disposed outside the fixed baffle.
Optionally, the jetting port of the nitrogen gas air knife module is in a flat slot shape.
Optionally, the servo motor has a position detection function.
Optionally, the baffle module is made of ceramic material.
Optionally, the fixed baffle and the sealing baffle arranged on the outer side of the fixed baffle are made of ceramic materials.
The utility model has the beneficial effects that:
(1) The utility model forms a complete sealing area on the surface of the plating bath, for example, a zinc-aluminum-magnesium plating layer is plated, a reliable nitrogen protection environment is formed in the plating area, the oxidation speed of zinc-aluminum-magnesium plating solution is effectively reduced, especially the oxidation speed of magnesium metal is reduced, the utilization rate of the plating solution is improved, and the influence of scum on the surface quality of strip steel is also reduced;
(2) The utility model effectively utilizes the gas blown by the nitrogen gas knife to form a blowing effect at the position where the strip steel breaks away from the liquid surface, effectively prevents the scum on the liquid surface from being sucked to the surface of the strip steel by the strip steel moving at high speed, and avoids the influence of the scum on the surface quality of the strip steel; the reverse flow of the air knife gas sprayed to the surface of the strip steel after being rebounded by the strip steel can form a reverse blowing effect on the surface of the plating solution, can blow the scum of the liquid level out of a sealing area, is beneficial to greatly purifying the plating solution impurities in the plating area, and creates a high-purity metal solution environment for plating; has multiple protection effects on zinc-aluminum-magnesium coating quality.
(3) The nitrogen protection atmosphere is sourced from the nitrogen knife, and an additional nitrogen source is not needed; the device is arranged on the existing air knife rest and the air inlet channel, does not need additional installation equipment, and has higher reliability and economy.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic diagram of the slag discharging state.
Reference numerals: servo motor 1, elevating system 2, fixed baffle 3, sealing baffle 4, nitrogen gas air knife 5, nitrogen gas 6 that the air knife blown out, dross 7, plating solution liquid level 8, belted steel 9, knife rest 10.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present utility model, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1-2, the utility model provides a nitrogen protection system for coating, which provides a nitrogen gas knife module and baffle modules arranged at two sides of the nitrogen gas knife module, wherein the nitrogen gas knife module and the baffle modules form a sealing structure, and an air inlet channel is arranged on the nitrogen gas knife module; and forming a protective cover on the surface of the plating solution tank in the plating process, and creating a protective atmosphere to prevent oxidation of the liquid surface of the plating solution tank and oxidation after metal plating. In this embodiment, the nitrogen gas knife modules are two oppositely arranged nitrogen gas knives 5, and zinc-coated aluminum magnesium is taken as an example for explanation.
The front and back sides of the nitrogen gas knife 5 facing the strip steel 9 are arranged at two sides of the strip steel 9 in pairs; the nitrogen gas knife 5 is provided with a knife rest 10 and a nitrogen gas inlet channel; the air inlet channel is provided with a fixed baffle 3; the fixed baffle 3 outside is provided with sealing baffle 4, fixed baffle 3, sealing baffle 4 and nitrogen gas air knife 5 form the nitrogen gas safety cover at plating bath surface, effectively utilize the nitrogen gas 6 that the air knife blew off, build the nitrogen gas protective atmosphere of coating region, prevent the oxidation of plating solution liquid level 8 and oxidation after the metal is coated. In the purging process, the surface of the strip steel 9 is cooled by the gas blown out by the nitrogen gas knife 5, so that the surface temperature of the strip steel is reduced, and the oxidation of the plating solution can be reduced. The knife rest 10 can be arranged on the fixed baffle plate 3 and can be lifted and lowered along with the movement of the fixed baffle plate 3; and can also not move together with the fixed baffle 3, only ensuring sealing.
The sealing baffle plate 4 is provided with a servo motor 1, a lifting mechanism 2 and a position detection device in a matching way, for example, the private clothes motor 1 has an absolute value encoder function, and during normal coating, the lower end of the sealing baffle plate 4 is immersed into a plating bath to form stable nitrogen protection atmosphere in a coating area; when the dross 7 in the plating solution tank is enriched to a certain extent and slag is required to be discharged, the sealing baffle plate 4 is lifted to be separated from the surface of the plating solution tank, a slag discharge gap is formed between the sealing baffle plate 4 and the liquid level 8 of the plating solution, nitrogen sprayed by the nitrogen gas knife 5 flows outwards to form a purging effect of the liquid level, and the dross 7 of the liquid level is blown out of the range of the nitrogen protection cover.
The jetting port of the nitrogen gas knife 5 is in a flat slot shape, and the jetting direction is perpendicular to the running direction of the strip steel 9; the range of the height H1 of the jetting port of the nitrogen gas knife 5 from the liquid level of the plating liquid tank is 50 mm-150 mm; the height H2 of the slag discharging channel ranges from 10mm to 50mm; the baffle module is made of ceramic materials, and the fixed baffle 3 and the sealing baffle 4 are made of ceramic materials; the sealing baffle 4 and the fixed baffle 3 can be integral or segmented, so that the installation and the replacement are convenient.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.
Claims (10)
1. A nitrogen protection system for coating is characterized in that: the nitrogen knife device comprises a nitrogen knife module and baffle modules arranged on two sides of the nitrogen knife module, wherein the baffle modules and the nitrogen knife module form a sealing structure; the end part of the baffle plate module is connected with a servo motor and a lifting mechanism, and the servo motor is used for driving the lifting mechanism to drive the baffle plate module to move along the direction approaching to or separating from the liquid level of the plating solution pond.
2. The nitrogen protection system for plating according to claim 1, wherein: the nitrogen gas air knife module comprises two nitrogen gas air knives which are respectively arranged at two sides of the plated metal.
3. The nitrogen protection system for plating according to claim 1, wherein: the nitrogen gas air knife module is arranged on the knife rest.
4. The nitrogen protection system for plating according to claim 2, wherein: the nitrogen gas air knives are arranged on the knife rest, and an air inlet channel is formed between the two knife rests which are arranged oppositely.
5. A nitrogen protection system for plating according to claim 3, wherein: the knife rest is connected with the baffle module.
6. The nitrogen protection system for plating according to claim 1, wherein: the baffle module comprises a fixed baffle connected with the knife rest and a sealing baffle arranged on the outer side of the fixed baffle.
7. The nitrogen protection system for plating according to claim 1, wherein: the jetting mouth of the nitrogen gas air knife module is in a flat slot shape.
8. The nitrogen protection system for plating according to claim 1, wherein: the servo motor has a position detection function.
9. The nitrogen protection system for plating according to claim 1, wherein: the baffle plate module is made of ceramic materials.
10. The nitrogen protection system for plating according to claim 6, wherein: the fixed baffle and the sealing baffle arranged on the outer side of the fixed baffle are made of ceramic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320350621.7U CN219670618U (en) | 2023-03-01 | 2023-03-01 | Nitrogen protection system for coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320350621.7U CN219670618U (en) | 2023-03-01 | 2023-03-01 | Nitrogen protection system for coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219670618U true CN219670618U (en) | 2023-09-12 |
Family
ID=87922367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320350621.7U Active CN219670618U (en) | 2023-03-01 | 2023-03-01 | Nitrogen protection system for coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219670618U (en) |
-
2023
- 2023-03-01 CN CN202320350621.7U patent/CN219670618U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |