KR102214699B1 - Snorkel and Snorkel manufacturing method - Google Patents

Abstract

The present invention is a body in which one side in the longitudinal direction is coupled to a snout through which the steel sheet heated in the heating furnace passes, the other side in the longitudinal direction is immersed in the plating bath, and a moving passage through which the steel sheet passing through the snout moves to the plating bath is formed. It includes, and the surface of the body is aluminum-plated to have a snorkel that can have both corrosion resistance and durability, and to a manufacturing method for manufacturing such a snorkel.

Description

Snorkel and Snorkel manufacturing method {Snorkel and Snorkel manufacturing method}

The present invention relates to a snorkel and a snorkel manufacturing method, and more particularly, to a snorkel and a snorkel manufacturing method that can have both corrosion resistance and heat resistance.

In general, applied galvanized products have excellent corrosion resistance and surface quality, so the application fields are diversified and the demand for them is increasing.

This applied galvanized steel sheet is cold-rolled or hot-rolled, and then the coiled steel sheet is mounted on a payoff reel to complete the welding between the leading and trailing steel sheets in a welding machine, and a heating furnace to secure plating adhesion when entering the zinc bath. Heat treatment is performed at, and the heat-treated steel sheet is brought into the applied zinc plating bath while being maintained at a suitable temperature for the applied zinc plating operation.

At this time, in order to prevent oxidation of the surface of the steel plate caused by exposure of the steel plate heat-treated to the atmosphere and the resulting plating peeling phenomenon, the steel plate guiding facility, the snout, and the snout are combined between the heating furnace and the applied zinc plating bath. The snorkel is placed, and the steel plate is transferred to the applied zinc plating bath through the snout and snorkel.

The inside of the snout and snorkel is filled with an inert gas (NHx) to prevent plating peeling due to oxidation on the surface of the steel sheet, and the steel sheet that has passed through it is plated in an applied zinc plating bath, and then disposed directly above the hot water surface. The plated adhesion amount is adjusted to the thickness corresponding to the demanded amount by the air knife, and the plated steel sheet is manufactured in a state processed on the surface through a temper rolling machine.After that, post-treatment and cutting machine for securing shape corrector and corrosion resistance are performed. After that, it is wound on a tension reel to make the final product.

At this time, since the snorkel bonded to the snout must not only pass through the steel sheet heated to a certain temperature in the heating furnace, but also be inserted into the applied zinc plating bath in which zinc is melted at a certain temperature or higher, it is heated and cooled. Since the process is repeated and thermally deformed, there is a problem that the operator has to replace the snorkel coupled to the snout by a certain period.

In other words, conventionally, when the snorkel is thermally deformed and the shape of the steel passage formed on the snorkel is deformed, the steel plate moves due to the change in the shape of the passage, and there is a problem that the quality of the product decreases due to friction with the snorkel. Since it has to be replaced or repaired periodically, there is a problem in that product productivity is degraded and unnecessary costs are consumed.

Therefore, there is a need for a new snorkel that can solve this problem.

Public Patent Publication No. 10-2013-0048623 (2013.05.10)

The present invention has been conceived to solve the above problems, and the problem to be solved in the present invention is to provide a snorkel capable of minimizing thermal deformation that occurs while the snorkel is cooled after heating.

The snorkel, which is the present invention for achieving the above object, is coupled to the snout 2 through which the plating object ST heated in the heating furnace 1 passes on one side in the length direction, and the other side in the length direction is a plating bath. Body 100, which is immersed in (3) and has a moving passage 110 through which the object to be plated (ST) passed through the snout (2) moves to the plating bath (3) is formed, and is horizontal at the other end in the longitudinal direction A dam part 120 formed by a horizontal part 121 that is coupled to each other, and a vertical part 122 having one longitudinal side coupled to the horizontal part 121 and the other longitudinal side bent into the moving passage 110, Nitrogen introduced into the moving passage 110 through the nitrogen discharging unit 200 on the inner circumferential surface of the body 100 and the nitrogen discharge unit 200 for discharging nitrogen into the moving passage 110 is transferred to the vertical part 122 ) And a guide part 130 that guides to the outer isolation space 110-1 located between the inner wall of the body 100 and the other end of the body 100, and the body 100 has an aluminum plated surface. Characterized in that, the guide part 130 is disposed inside the body 100 and spaced apart from the inner wall of the body 100 to adjust the movement path and emission angle of nitrogen, but the plating target (ST) and the The movement and release angle of nitrogen is adjusted so that the plating solution powder, which is generated by a chemical reaction of the plating solution located in the plating bath 3 and adheres to the inner wall of the body 100, falls into the outer isolation space 110-1. It characterized in that it includes; direction control plate 131 to limit.

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In addition, the vertical portion 122 is characterized in that the inclined surface (122-1) is formed on the outer peripheral surface of the other longitudinal direction facing the moving passage (110).

In addition, it further includes a foreign material removal unit 300 for sucking the foreign material located in the outer isolation space (110-1), the outer circumferential surface of the body 100 and the outer isolation space (110-1) It characterized in that the foreign material absorption hole 101 connecting the rejection 300 is formed.

In addition, it characterized in that it further comprises a reinforcing portion 140 that is located in the outer isolation space (110-1) to limit the change of the vertical portion 122 and the inner peripheral surface separation distance (A) of the body 100. .

The method for manufacturing a snorkel according to the present invention for achieving the above object includes a plating step (S100) of plating aluminum on the surface of the body 100 by an aluminizing technique; And an alloy layer diffusion step (S200) of diffusing the alloy layer 3 formed between the body 100 and the aluminum plating layer 2 by heat treatment of the aluminum-plated body 100.

내지 610

인 스틸로 이루어진 것을 특징으로 한다.In addition, the body 100 has a tensile strength of 490

To 610

It characterized in that it is made of in steel.

In addition, the alloy layer diffusion step (S200) is characterized in that performed for 6 hours to 8 hours at 850 degrees to 950 degrees.

In the present invention, since aluminum is plated on the surface of the body to have both corrosion resistance and heat resistance, it is possible to minimize the occurrence of thermal deformation when the plating process is performed at a high temperature.

In detail, the existing snorkel is made of a material having good corrosion resistance to prevent corrosion, but the material having good corrosion resistance has a problem that heat deformation easily occurs due to weak strength. In the present invention, the body of the snorkel is The basic material constituting is formed of a high-strength material, but the surface of the snorkel body formed of such a high-strength material is plated with aluminum so that the snorkel can have both heat resistance and corrosion resistance.

In addition, by forming an air curtain with nitrogen, the zinc powder generated when the steel sheet and the liquid zinc meet each other can be isolated on a designated space, so that the zinc powder generated when dissimilar metals meet can prevent the zinc plating of the steel sheet from interfering. .

In addition, there is an advantage in that an inclined surface for adjusting the direction of nitrogen forming the air curtain is formed on the vertical portion, so that the movement path of nitrogen can be more smoothly adjusted.

In addition, since it is possible to limit the space where the zinc powder is located, there is an advantage in that the zinc powder located inside the snorkel can be removed more efficiently.

In addition, there is an advantage that the reinforcing portion is positioned between the body and the space formed by the dam portion to further increase the degree of resistance to deformation.

In addition, the area of the Fe-Al alloy layer with excellent heat resistance and corrosion resistance formed between the body made of iron (Fe) and the coating part made of aluminum (Al) can be expanded through the alloy layer diffusion step, thereby improving the reliability of the device. There is an advantage to be able to.

1 is a conceptual diagram showing a zinc plating process using a snorkel of the present invention.
Figure 2 is a front perspective view showing the present invention snorkel.
3 and 4 are conceptual diagrams showing a thermal deformation form of a conventional snorkel.
5 is an experimental data showing a metal layer generated when aluminum is coated on the surface of the body constituting the snorkel of the present invention.
6 is experimental data showing the diffusion of the alloy layer that appears when the surface of the aluminum-coated body is heat treated.
Figure 7 is an AA cross-sectional view of the present invention snorkel.
Figure 8 is a front perspective view showing that the foreign matter removal unit is coupled to the present invention snorkel.

Advantages and features of the embodiments of the present invention, and a method of achieving them will become apparent with reference to the embodiments described later in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

In describing the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in an embodiment of the present invention, which may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification.

Hereinafter, a snorkel 1000 and a snorkel manufacturing method according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a conceptual diagram showing a process in which a plating object ST is heated in a heating furnace 1 and moves to a plating bath 3 through a snout 2 during a zinc plating process, and FIG. 2 is a zinc plating of FIG. It is a front perspective view showing the snorkel 1000 forming a passage through which the plating object ST introduced into the snout during the process moves to the plating bath 3.

1 and 2, the present invention snorkel 1000 is coupled to the snout (2) through which the plating object (ST) heated in the heating furnace (1) one side in the longitudinal direction passes, and the other side in the longitudinal direction It is immersed in the plating bath (3), and includes a body (100) forming a moving passage (110) through which the plating target (ST) passed through the snout (2) inside the plating bath (3), The surface of the body 100 is plated with aluminum.

The snorkel 1000 is immersed in the liquefied zinc solution on the plating bath 3 while the other side in the longitudinal direction maintains a temperature of about 460 degrees, and the temperature of about 460 degrees through the moving passage 110 formed therein. The plating object ST heated by the furnace passes through.

At this time, the snorkel 1000 may contact the zinc solution positioned on the plating bath 3 and corrosion may occur.

~510

의 인장강도를 가지는 스틸인 SS400을 사용하여 제작하였고, 스노켈의 길이방향 타측을 탄소 함량을 낮춰 내식성을 향상시킨 스틸 제품인 SUS316L을 사용하여 제작하였다.Conventionally, in order to prevent this problem, one side in the longitudinal direction of the snorkel connected to the snout is 400

~510

It was manufactured using SS400, a steel having a tensile strength of, and the other side in the longitudinal direction of the snorkel was manufactured using SUS316L, a steel product that improved corrosion resistance by lowering the carbon content.

That is, by forming the other side of the snorkel in the longitudinal direction of SUS316L, which has strong corrosion resistance, corrosion of the snorkel is minimized.

However, since this conventional snorkel is made of SUS316L material with poor heat resistance on the other side in the longitudinal direction in contact with the zinc solution located inside the zinc bath, there is a problem that deformation due to heat is easily generated.

3 shows a cross-sectional view of the snorkel 10 in a normal state, and FIG. 4 shows a cross-sectional view of the snorkel 10 deformed by heat transmitted from the outside.

Referring to Figures 3 and 4, in the case of the conventional snorkel 10, a plating object heated to 460 degrees passing through the material is made of a material having strong corrosion resistance but low heat resistance, and zinc maintaining a temperature of 460 degrees. When continuously receiving heat from the solution, the shape is deformed from the normal state shown in the conceptual diagram shown in FIG. 3 to the heat deformed state shown in FIG. 4, and thus inside the snorkel 10 or inside the snorkel 10 Since the formed dam 11 and the steel plate 12 come into contact with each other, a scratch may occur on the surface of the steel plate 12 and a problem in that galvanization may not be performed properly. In the present invention, the plating target ( ST) through which the moving passage 110 is formed and the surface of the body 100 formed of a material having excellent heat resistance is plated with aluminum having excellent corrosion resistance, so that the snorkel is resistant to heat deformation and corrosion. I made it possible to have all tolerance.

At this time, the snorkel 1000, whose surface is plated, is subjected to a plating step (S100) of plating aluminum on the surface of the body 100 by an aluminizing technique, and by applying heat to the aluminum-plated body 100 It can be manufactured by a snorkel manufacturing method including the alloy layer diffusion step (S200) of diffusing the alloy layer 5 formed between the body 100 and the aluminum plating layer (4).

Referring to FIG. 1, after melting aluminum in the plating step (S100), the body 100 made of iron-based steel or steel is immersed in the molten aluminum, and an aluminum plating layer 4 is formed on the surface of the body 100. ), and expanding the alloy layer 5 formed between the aluminum-coated body 100 and the aluminum plating layer 4 in the alloy layer diffusion step (S200).

5 shows the metal layer appearing on the surface of the body 100 after the plating step (S100), and in FIG. 6, the alloy layer 5 among the metal layers is expanded by the alloy layer diffusion step (S200). Is shown.

When described in detail with reference to FIGS. 5 and 6, when plating aluminum by using an aluminizing method on the surface of the body 100 in the plating step (S100), the body 100 as shown in FIG. 5 The aluminum plating layer 4 is located on the surface of the alloy layer 5 by chemical reaction between the iron body 100 and the aluminum plating layer 4 at a position where the aluminum plating layer 4 and the body 100 contact each other. ) Is formed, and an aluminum oxide layer 6 is formed on the surface of the aluminum plating layer 4 in contact with air.

내지 610

인 SM490, 인장강도 570

이상의 SM570, HT800 등의 스틸일 수 있음은 물론이다.At this time, the body 100 is made of iron (Fe) material, and the aluminum plating layer 4 may be made of aluminum (Al) material, so that the alloy layer 5 is formed by a chemical reaction between iron and aluminum. It may be, and the body 100 has a tensile strength of 490 in which the Fe material is the main

To 610

Phosphorus SM490, tensile strength 570

Of course, it may be steel such as the above SM570 and HT800.

In addition, the alloy layer diffusion step (S200) is recommended to be performed for 6 hours to 8 hours at 900 degrees to 1000 degrees, and the best efficiency can be obtained when performed for 7 hours at 950 degrees as shown in FIG. In the case of the present inventor snorkel 1000, as described above, the plating object ST heated to 460 degrees passes through and receives heat by contacting the molten zinc of 460 degrees located in the plating bath 3, It goes without saying that the alloy layer diffusion step (S200) may be performed naturally.

Once again, since the alloy layer 5 has excellent properties in both heat resistance and corrosion resistance compared to simple iron or aluminum, the thickness of the alloy layer 5 is increased through the alloy layer diffusion step (S200). , The present invention snorkel (1000) is to have a more excellent resistance to corrosion or heat deformation.

7 is an A-A cross-sectional view of the snorkel 1000.

Referring to FIG. 7, the snorkel 1000 includes a horizontal portion 121 horizontally coupled to the other end of the longitudinal direction, and one side in the length direction is coupled to the horizontal portion 121, and the other side in the length direction is the moving passage. (110) It may include a dam portion 120 formed by a collection of vertical portions 122 bent inside.

In detail, since the plating object ST such as a steel sheet and a plating solution such as zinc located in the plating bath 3 are dissimilar metals having different properties, a chemical reaction occurs when they contact each other. The plating solution is powdered by a chemical reaction and is attached to the inner wall of the body 100.

At this time, when the zinc powder attached to the inner wall of the body 100 is separated from the body 100 and the plating object ST is located floating on the surface of the zinc solution introduced into the zinc solution, the plating object ST Since zinc powder is attached to the plated object (ST) so that the plating of the object ST cannot be completed, in the present invention, each metal plate forming the body 100 at the other end in the length direction of the body 100 faces each other. Doedoe coupled in a bent form, the horizontal portion 121 horizontally coupled to the surface of the zinc solution, and coupled to the end of the horizontal portion 121 so as to be horizontal with each metal plate forming the body 100 By forming the dam part 120 formed by the vertical parts 122 gathered, the zinc powder attached to the inner wall of the body 100 is in contact with the plating target ST that is introduced into the plating bath 3 through the body 100. I prevented it.

In other words, the vertical part 122 is the outer isolation space 110-1 adjacent to each metal plate forming the body 100 with the moving passage 110 formed on the other side of the body 100 in the longitudinal direction. And, the plating target (ST) passes through and is separated into an inner isolation space 110-2 formed in the center, and the zinc powder attached to the body 100 and then detached falls into the outer isolation space 110-1. By doing so, the contact between the zinc powder and the plating object ST is prevented.

Referring to FIG. 7, the snorkel 1000 according to the present invention further includes a nitrogen discharge part 200 for discharging nitrogen to the moving passage 110, and the nitrogen discharge part 200 on the inner circumferential surface of the body 100 A guide part for guiding nitrogen introduced into the moving passage 110 through the other longitudinal end of the vertical part 122 and the outer isolation space 110-1 located between the inner wall of the body 100 130 may be formed.

In detail, in the present invention, when the zinc powder attached to the inner wall is detached, the snorkel 1000 drops the zinc powder onto the outer isolation space 110-1 to isolate the inside through which the object ST passes. The zinc powder is located floating on the surface of the zinc solution located in the space 110-2, and when the plating object ST is plated, zinc powder adheres to the surface of the zinc solution or the zinc powder is applied to the plating object ST ) To prevent the zinc solution from being plated on the surface of the object to be plated (ST).

However, when the zinc powder attached to the inner circumferential surface of the body 100 simply falls due to vibrations generated while the device is operated, the zinc powder cannot fall into the outer isolation space 110-1 and the inner isolation space 110 -2) may cause a problem of falling, in the present invention, as shown in FIG. 7, in the present invention, a nitrogen discharge unit 200 that receives gas such as nitrogen from the upper side of the body 100 and discharges it into the body 100. ), and formed inside the body 100 and spaced apart from the inner surface of the body 100 by a certain distance, the nitrogen introduced into the moving passage 110 through the nitrogen discharge unit 200 is transferred to the outer isolation space 110-1. ) To form a guide portion 130 of the plate shape, so that the zinc powder detached from the body 100 is moved to the outer isolation space (110-1).

At this time, as shown in FIG. 7, the guide part 130 is attached to an inner wall of one side of the body 100 in the length direction of the body 100, and a constant with the inner wall of the body 100 along the inner wall of the body 100 A guide plate 130A which is spaced apart and extends to the other side in the length direction of the body 100, and has a direction control plate 131 for adjusting the movement path and emission angle of nitrogen discharged to the other end in the length direction, and a guide plate It may include a displacement limiting member (130B) connecting the body (130A) and the body (100) to maintain a state that the guide plate (130A) is spaced apart from the inner wall of the body (100) by a predetermined distance.

That is, the guide plate (130A) is disposed a predetermined distance from the body (100) to form a movement path through which nitrogen moves, and the displacement limiting member (130B) is between the body (100) and the guide plate (130A) It is located in the guide plate (130A) to prevent separation or deformation from the designated position, the direction control plate 131 is discharged through the direction control plate 131 by adjusting the nitrogen movement path formed by the guide plate (130A). Nitrogen is desorbed from the inner wall of the body 100 so as to act as an air curtain to limit the falling position of the falling zinc powder to the outer isolation space 110-1.

In addition, the vertical portion 122 may have an inclined surface 122-1 formed on the outer peripheral surface of the other longitudinal direction facing the moving passage 110.

In detail, the snorkel 1000 of the present invention discharges nitrogen emitted by the direction control plate 131 to the other end in the longitudinal direction of the vertical part 122 forming the outer isolation space 110-1 As a result, an air curtain is formed that limits the position where the zinc powder falls to the outer isolation space 110-1.

At this time, when the falling powder moves on the nitrogen discharged toward the other end of the vertical part 122 in the longitudinal direction, when the other end of the vertical part 122 has a flat shape, the zinc powder is applied to the vertical part 122 ) Hitting the end and entering the inner isolation space 110-2, in the present invention, the lengthwise direction of the vertical part 122 from the inside to the outside toward the other end in the longitudinal direction of the vertical part 121 By forming the inclined surface 122-1 inclined in one direction from the other side, when the zinc powder moved through nitrogen and nitrogen collides with the end of the vertical part 122, it naturally moves to the outer isolation space 110-1 I made it.

Referring to FIG. 8, the present inventors snorkel 1000 further includes a foreign substance removing part 300 for sucking foreign substances located in the outer isolation space 110-1, and on the outer peripheral surface of the body 100 A foreign material absorption hole 101 connecting the outer isolation space 110-1 and the foreign material removal unit 300 may be formed.

In detail, the zinc powder introduced into the outer isolation space 110-1 is sucked in from the foreign matter removal unit 300 through the foreign matter absorption hole 101 formed on the body 100, and the outer isolation space This is to prevent the accumulation of zinc powder above a certain height in (110-1).

At this time, the method of sucking and removing the zinc powder located on the outer isolation space 110-1 may be a method of inserting a suction nozzle onto the outer isolation space 110-1, but as shown in FIG. When rotating the screw 310 together, the absorption space 320 and the outer isolation space 110-1 of the foreign material removing unit 300 communicated with the outer isolation space 110-1 through the absorption hole 101 It goes without saying that the zinc powder located in the outer isolation space 110-1 can be absorbed into the foreign material removing unit 300 through the movement of the fluid generated by the pressure difference.

In addition, referring to Figure 7, the present inventors snorkel 1000 is located in the outer isolation space (110-1) to limit the change in the separation distance (A) of the inner peripheral surface of the vertical portion 122 and the body 100 A reinforcing part 140 may be further included.

In detail, in the present invention, the body 100 is formed of a material having a certain or more rigidity to increase heat resistance, and the surface of the body 100 is plated with aluminum to prevent the body 100 from being corroded. In the case of the Kel 1000, because it is always exposed to a certain amount of heat, deformation may occur. In the present invention, the reinforcement connecting the vertical part 122 and the body 100 to the outer isolation space 110-1 By forming the part 140, the body 100 and the inner circumferential surface separation distance (A) is to be always kept constant.

In addition, referring to FIG. 8, the snorkel 1000 according to the present invention may further include a deformation preventing part 400 connecting the foreign matter removing part 300 and the body 100.

In detail, when the body 100 is deformed by heat applied from the outside, the foreign material removing unit 300 and the body 100 are separated from each other, and the foreign material removing unit 300 through the absorption hole 101 Since a problem in which zinc powder is not easily inhaled into the absorption space 320 may occur, in the present invention, the absorption hole 101 is in communication with the lower side of the body 100 and the absorption hole 101 for absorption. By connecting the lower side of the foreign matter removing unit 300 formed with the absorption space 320 for sucking zinc powder located in the outer isolation space 110-1 through the hole 101 with the deformation preventing unit 400, It solves the problem that occurs when the combination of is dissociated.

In this case, as shown in FIG. 9, the deformation preventing part 400 may have one side in the length direction inserted into the body 100 and the other side in the length direction inserted into the foreign matter removing part 300. However, in addition to this, since one side in the longitudinal direction may be welded or bolted to the outer circumferential surface of the body 100, and the other side in the longitudinal direction may be welded or bolted to the outer circumferential surface of the foreign matter removing unit 300, etc. I never do that.

In addition, in the snorkel 1000 according to the present invention, the dam part 120 may have a communication hole communicating the moving passage 110 and the outer isolation space 110-1 on the vertical part 122. .

In detail, in the present invention, the body 100 includes an inner isolation space 110-2, which is a space through which the plating object ST passes by the dam part 120, and the dam part 120 ) It is separated into an outer isolation space 110-1 located at the edge, and the other side in the longitudinal direction of the body 100 is partially immersed in the plating bath 3, so that the outer isolation space 110-1 and the inner isolation space The zinc solution of the plating bath 3 is placed on (110-2) to a certain height.

At this time, when the outer isolation space 110-1 and the inner isolation space 110-2 are isolated by the dam part 120, the zinc powder introduced into the outer isolation space 110-1 is externally isolated. There may be a problem of being immersed in the zinc solution located on the space 110-1 and stagnating.

Therefore, in the present invention, the inner isolation space 110-2 and the outer isolation space 110-1 are communicated with each other through the communication hole, so that the flow of the zinc solution in the inner isolation space 110-2 is prevented from the outer isolation space ( 110-2) is transferred to the zinc solution positioned above, thereby preventing the powder immersed in the zinc solution in the outer isolation space 110-1 from stagnating.

In addition, the communication hole is disposed opposite to each other with the absorption hole 101 on the left and right sides of the vertical portion 122, and zinc powder located on the outer isolation space 110-1 through the absorption hole 101 When the zinc solution flows into the foreign substance removing unit 300, the zinc solution located on the inner isolation space 110-2 naturally moves to the outer isolation space 110-1 through the communication hole, and the outer isolation space 110- Of course, it can induce the movement of the zinc powder accumulated in 1).

In addition, although not shown in the drawing, a plurality of communication holes may be formed in the circumferential direction of the vertical portion 122, and in one embodiment, two communication holes are formed at the same height on the left and right sides of the vertical portion 122. It may be a structure that is formed spaced apart.

In addition, the communication hole is located below the absorption hole 101, so that the movement of the zinc solution moving from the inner isolation space 110-2 to the foreign material removal unit 300 through the outer isolation space 110-1 It is recommended to make it occur from the bottom to the top.

The present invention is not limited to the above-described embodiments, and the scope of application thereof is diverse, as well as anyone with ordinary knowledge in the field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Of course, various modifications are possible.

A: separation distance
1: heating furnace 2: snout
3: plating bath
100: body 101: foreign matter absorption hole
110: mobile passage 110-1: outer isolation space
120: dam part 121: horizontal part
122: vertical part 122-1 slope
130: guide part 131: direction control plate
140: reinforcement part
200: nitrogen emission part
S100: plating step
S200: alloy layer diffusion step

Claims (10)

One side in the longitudinal direction is coupled to the snout 2 through which the object ST heated in the heating furnace 1 passes, and the other side in the longitudinal direction is immersed in the plating bath 3, and the snout 2 is placed inside. A body 100 in which a moving passage 110 through which the passed plating object ST moves to the plating bath 3 is formed;
A horizontal portion 121 that is horizontally coupled to the other end of the longitudinal direction and a vertical portion 122 that is coupled to the horizontal portion 121 and the other side in the length direction is bent into the moving passage 110 are collected. Dam part 120 made;
A nitrogen discharge unit 200 for discharging nitrogen through the moving passage 110; And
The nitrogen introduced into the moving passage 110 through the nitrogen discharge unit 200 on the inner circumferential surface of the body 100 is located between the other end of the vertical part 122 in the longitudinal direction and the inner wall of the body 100 Includes; a guide portion 130 for guiding to the outer isolation space (110-1),
The body 100 is characterized in that the surface is plated with aluminum,
The guide part 130 is disposed inside the body 100 to be spaced apart from the inner wall of the body 100 to adjust the movement path and discharge angle of nitrogen, but the plating object ST and the plating bath 3 A direction control plate ( 131); characterized in that it comprises, snorkel.
delete delete delete The method of claim 1,
The vertical portion 122 is characterized in that the inclined surface (122-1) is formed on the outer peripheral surface of the other longitudinal direction facing the moving passage (110), snorkel.
The method of claim 5,
Further comprising a foreign material removal unit 300 for sucking the foreign material located in the outer isolation space (110-1),
A snorkel, characterized in that a foreign material absorption hole 101 connecting the outer isolation space 110-1 and the foreign material removal unit 300 is formed on the outer circumferential surface of the body 100.
The method of claim 5 or 6,
It is located in the outer isolation space (110-1), characterized in that it further comprises a reinforcing part (140) for limiting the change in the distance (A) of the vertical part (122) and the inner peripheral surface of the body (100), snow Kell.
The method of claim 1,
The dam part 120 is characterized in that a communication hole for communicating the moving passage 110 and the outer isolation space 110-1 is formed on the vertical part 122, a snorkel.
In the snorkel manufacturing method for manufacturing the snorkel of any one of claims 1, 5 and 6,
Plating step of plating aluminum on the surface of the body 100 by an aluminizing technique (S100);
An alloy layer diffusion step (S200) of diffusing the alloy layer 3 formed between the body 100 and the aluminum plating layer 2 by heat treatment of the aluminum-plated body 100 (S200); How to make a snorkel.
The method of claim 9,
The alloy layer diffusion step (S200) is characterized in that made for 6 to 8 hours at 850 degrees to 950 degrees, snorkel manufacturing method.

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