KR20200050783A - Snorkel and Snorkel manufacturing method - Google Patents

Abstract

The present invention relates to a snorkel and a manufacturing method thereof, wherein the snorkel includes a body of which one side in the longitudinal direction is coupled to a snout through which a steel sheet heated by a heating furnace passes and the other side in the longitudinal direction is immersed in a plating bath and in which a moving path for the steel sheet having passed through the snout to move to the plating bath is formed, and the snorkel has both corrosion resistance and durability as the surface of the body is plated with aluminum.

Description

Snorkel, 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, which can have both corrosion resistance and heat resistance.

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

After the hot dip galvanized steel sheet is cold rolled or hot rolled, the coiled steel sheet is mounted on a pay-off reel to complete welding between the preceding and subsequent steel sheets in a welding machine, and a heating furnace to secure plating adhesion when entering the zinc bath. In the heat treatment, the heat-treated steel sheet is drawn into the applied zinc plating bath while being maintained at an appropriate temperature for the applied zinc plating operation.

At this time, in order to prevent the oxidation of the surface of the steel sheet caused by the high temperature heat-treated steel sheet exposed to the atmosphere and the plating peeling phenomenon caused by this, the steel sheet guiding facility between the heating furnace and the applied zinc plating bath is coupled to a snout and a snout. The snorkel is placed, and the steel plate is moved to the applied zinc plating bath through these snouts and snorkels.

Inside the snout and snorkel are filled with an inert gas (NHx) to prevent plating peeling due to oxidation of 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 excreted on the top of the bath surface. The plating adhesion amount is adjusted to the thickness corresponding to the demand of the demanded price by the air knife, and the plated steel sheet is manufactured in a processed state on the surface through a temper rolling mill, after which a post-processing and cutting machine to secure the shape corrector and corrosion resistance After being wound up on the tension reel, it becomes the final product.

At this time, the snorkel coupled to the snout must not only pass through the steel plate heated to a certain temperature in the heating furnace, but also must be in a state where zinc is melted at a temperature above a certain level and inserted into the applied zinc plating tank, which is present in the liquid phase, thereby heating and cooling. Since the process is repeated and thermally deformed, the operator has a problem in that the snorkel coupled to the snout must be replaced by a certain cycle.

That is, 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 rubs against the snorkel to degrade the product quality. Since it needs to be periodically replaced or repaired, there is a problem in that product productivity decreases and unnecessary costs are consumed.

Therefore, there is a need for a new snorkel that can solve these problems.

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

The present invention has been devised to solve the above problems, and an object to be solved in the present invention is to provide a snorkel capable of minimizing thermal deformation occurring while the snorkel is heated and cooled.

The snorkel according to the present invention for achieving the above object is coupled to the snout 2 through which the object to be plated ST heated in the heating furnace 1 passes, and the other side in the longitudinal direction is a plating bath. Included in (3), the body 100 is formed with a movement passage 110 through which the plated object ST passing through the snout 2 moves to the plating tank 3 inside; (100) is characterized in that the surface is aluminum plated.

In addition, a horizontal portion 121 horizontally coupled to the other end portion in the longitudinal direction, and a vertical portion 122 in which one side in the longitudinal direction is coupled to the horizontal portion 121 and the other side in the longitudinal direction is bent into the movement passage 110. It characterized in that it comprises a dam portion 120 is made of.

In addition, further comprising a nitrogen discharge unit 200 for discharging nitrogen into the mobile passage 110, nitrogen introduced into the mobile passage 110 through the nitrogen discharge unit 200 on the inner peripheral surface of the body 100 It is characterized in that the guide portion 130 is formed to guide the outer side of the vertical portion 122 in the longitudinal direction and the outer isolation space 110-1 located between the inner wall of the body 100.

In addition, the guide portion 130 is characterized in that it is disposed on the inner side of the body 100 and spaced apart from the inner wall of the body 100 to adjust the movement path and the emission angle of nitrogen 131. .

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

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

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

The snorkel manufacturing method of the present invention for achieving the above object, a plating step of plating aluminum on the surface of the body 100 by an aluminizing technique (S100); 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-treating the body 100 plated with aluminum.

내지 610

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

To 610

It is made of in steel.

In addition, the alloy layer diffusion step (S200) is characterized in that made 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 and has both corrosion resistance and heat resistance, it is possible to minimize occurrence of thermal deformation when a 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 in the case of a material having good corrosion resistance, there is a problem in that heat deformation is easily generated due to weak strength, so the body of the snorkel is used in the present invention. The base material is formed of a high-strength material, but the surface of the snorkel body formed of a high-strength material is aluminum-plated so that the snorkel can have both heat resistance and corrosion resistance.

In addition, since the air curtain is formed of 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 the different metals meet can prevent the galvanization of the steel sheet. .

In addition, an inclined surface for controlling the direction of nitrogen forming an air curtain is formed in the vertical portion, and thus, the movement path of nitrogen can be smoothly adjusted.

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

In addition, the reinforcing portion is positioned between the body and the space formed by the dam portion, thereby increasing the degree of resistance to deformation.

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

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

Advantages and features of embodiments of the present invention, and methods of achieving them will be apparent with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present 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 person having the scope of the invention, and the present invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

In describing embodiments of the present invention, when it is determined that a detailed description of known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description 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 a user's or operator's intention or practice. 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.

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

1 and 2, the snorkel 1000 according to the present invention is coupled to the snout 2 through which the plated object ST heated in one of the longitudinal furnaces 1 passes, and the other in the longitudinal direction. Includes a body 100 that is immersed in the plating bath 3 and forms a movement passage 110 through which the plating target ST passing through the snout 2 moves to the plating bath 3, wherein the The body 100 is aluminum-plated.

The snorkel 1000 is immersed in the zinc solution on the plating bath 3, the other side of which is in the longitudinal direction maintaining a temperature of about 460 degrees, and is liquefied, and a temperature of about 460 degrees through the movement passage 110 formed therein. The plated object ST heated by is passed through.

At this time, the snorkel 1000 is in contact with the zinc solution located on the plating bath 3 may cause a problem that corrosion occurs.

~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 such a problem, the lengthwise side of the snorkel connected to the snout is 400

~ 510

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

That is, the other side of the snorkel is formed of SUS316L material having strong corrosion resistance to minimize corrosion of the snorkel.

However, the conventional snorkel has a problem in that the other side in the longitudinal direction in contact with the zinc solution located inside the zinc bath is made of SUS316L, which has low heat resistance, and thus easily deforms due to heat.

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

3 and 4, in the case of the conventional snorkel 10, the corrosion resistance is strong, but it is made of a material having weak heat resistance, and a plated object heated to 460 degrees passing through the inside and zinc maintained at a temperature of 460 degrees. When heat is continuously transmitted from the solution, the shape is deformed from the steady state shown in the conceptual diagram shown in FIG. 3 to the thermally deformed state shown in FIG. 4, inside the snorkel 10 or inside the snorkel 10. Since the formed dam 11 and the steel sheet 12 come into contact, the surface of the steel sheet 12 may be scratched, resulting in a problem that zinc plating is not properly performed. In the present invention, the plating object in the longitudinal direction ( The movement passage 110 through which ST) passes 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 distortion and corrosion. It will be able to have all of the resistance.

At this time, the snorkel 1000, the surface of which is plated, is plated (S100) in which aluminum is plated on the surface of the body 100 by an aluminizing technique, and heat is applied to the body 100, which is plated with aluminum. It may be manufactured by a snorkel manufacturing method comprising an alloy layer diffusion step (S200) for diffusing the alloy layer 5 formed between the body 100 and the aluminum plating layer (4).

Referring to FIG. 1, after the aluminum is melted in the plating step (S100), the body 100 made of steel or steel based on iron is immersed in the molten aluminum to form an aluminum plating layer 4 on the surface of the body 100. ) To expand 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 FIG. 6 shows that the alloy layer 5 of the metal layer is expanded by the alloy layer diffusion step (S200). City.

5 and 6, in the plating step (S100), when plating aluminum using an aluminizing method on the surface of the body 100, the body 100 as shown in FIG. An aluminum plating layer 4 is located on the surface of the alloy layer, and the body 100 made of iron and the aluminum plating layer 4 are chemically reacted at the position where the aluminum plating layer 4 and the body 100 are in contact with each other, and the alloy layer 5 ) 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, the aluminum plating layer 4 may be made of aluminum (Al) material, so the alloy layer 5 is FeAl formed by chemical reaction of iron and aluminum May be, the body 100 is the tensile strength of the Fe material is the main 490

To 610

Phosphorus SM490, tensile strength 570

Of course, it may be steel such as SM570 or 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 as shown in FIG. 6, the highest efficiency can be obtained when it is performed for 7 hours at 950 degrees, In the case of the snorkel 1000 according to the present invention, as described above, the plating target ST heated to 460 degrees passes, and heat is transferred to the molten zinc at 460 degrees located in the plating tank 3, thereby receiving heat. Of course, the alloy layer diffusion step (S200) can be made naturally.

Once again, the alloy layer 5 has superior heat resistance and corrosion resistance compared to simple iron or aluminum, and thus increases the thickness of the alloy layer 5 through the alloy layer diffusion step (S200). , It is to enable the present invention snorkel (1000) to have more excellent resistance to corrosion or thermal deformation.

7 shows an A-A sectional view of the snorkel 1000.

Referring to FIG. 7, the snorkel 1000 has a horizontal portion 121 horizontally coupled to the other end portion in the longitudinal direction, and one side in the longitudinal direction is coupled to the horizontal portion 121 and the other side in the longitudinal direction is the movement passage. (110) may include a dam portion 120 made of a vertical portion 122 is bent inside.

In detail, the plating object (ST) such as a steel sheet and the plating solution such as zinc located in the plating bath (3) are heterogeneous metals having different properties, and thus chemical reactions occur when they are in contact with 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 target ST is floating on the surface of the zinc solution that is introduced into the zinc solution, the plating target ST Since the zinc powder is attached to the plating of the object to be plated (ST) is not completely made, in the present invention, each metal plate forming the body 100 at the other end in the longitudinal direction of the body 100 faces each other. Combined in a bent form, the horizontal portion 121 is horizontally coupled to the surface of the zinc solution, and is coupled to the end of the horizontal portion 121 to be level with each metal plate forming the body 100 By forming the dam portion 120 in which the vertical portion 122 is 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 tank 3 through the body 100. It was prevented.

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

Referring to FIG. 7, the snorkel 1000 according to the present invention further includes a nitrogen discharge unit 200 that discharges nitrogen into the movement passage 110, and the nitrogen discharge unit 200 on the inner circumferential surface of the body 100. A guide portion for guiding nitrogen introduced into the movement passage 110 through the other end portion in the longitudinal direction of the vertical portion 122 to 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 from the snorkel 1000 in the present invention, the zinc powder is dropped onto the outer isolation space 110-1 so that the plating object ST passes through the inner isolation. When the zinc powder is floating on the surface of the zinc solution located on the space 110-2, when the plating target ST is plated, the zinc powder is attached to the surface of the zinc solution or the zinc powder is plated (ST ) To prevent the zinc solution from being plated on the surface of the plated object (ST).

However, when the zinc powder attached to the inner circumferential surface of the body 100 falls due to vibration caused by the operation of the device, the zinc powder does not fall into the outer isolation space 110-1 and the inner isolation space 110 Since the problem of falling to -2) may occur, in the present invention, as shown in FIG. 7, a nitrogen discharge unit 200 that receives gas such as nitrogen from the outside on the upper side of the body 100 and discharges it into the body 100 ), And is formed at a predetermined distance from the inner surface of the body 100 inside the body 100, the nitrogen introduced into the movement passage 110 through the nitrogen discharge unit 200 to the outer isolation space (110-1) ) Is formed to guide the plate-shaped guide portion 130 to guide the zinc powder detached from the body 100 to move to the outer isolation space 110-1.

At this time, the guide portion 130 is attached to the inner wall of one side in the longitudinal direction of the body 100, as shown in Figure 7, the inner wall of the body 100 along the inner wall of the body 100 and constant The guide plate 130A and the guide plate, which are spaced apart and formed to extend to the other side in the longitudinal direction of the body 100, are formed with a direction adjusting plate 131 for adjusting a movement path and an emission angle of nitrogen discharged at the other end in the longitudinal direction. The guide plate 130A may include a displacement limiting member 130B connecting the 130A and the body 100 to maintain a state spaced apart from the inner wall of the body 100 by a predetermined distance.

That is, the guide plate 130A is disposed at a predetermined distance from the body 100 to form a movement path in which nitrogen moves, and the displacement limiting member 130B is between the body 100 and the guide plate 130A. The guide plate 130A is prevented from being deformed or deformed at a designated position, and 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 detached from the inner wall of the body 100 to serve as an air curtain to limit the location where the falling zinc powder falls to the outer isolation space 110-1.

In addition, the vertical portion 122 may be formed with an inclined surface 122-1 on the other outer peripheral surface in the longitudinal direction facing the movement passage 110.

In detail, the snorkel 1000, which is the present invention, releases nitrogen discharged by the directional control plate 131 to the other end of the vertical portion 122 forming the outer isolation space 110-1. Thus, to form an air curtain that limits the location 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 portion in the longitudinal direction of the vertical portion 122, when the other end portion in the longitudinal direction of the vertical portion 122 has a flat shape, the zinc powder is a vertical portion 122 ) May encounter a problem that is intruded into the inner isolation space 110-2 and hits the end of the vertical direction of the vertical portion 121 in the present invention. Forming the inclined surface (122-1) inclined in one direction from the other side, when the zinc powder moved on nitrogen and nitrogen hits the end of the vertical portion (122), naturally moves to the outer isolation space (110-1) It was done.

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

In detail, the zinc powder introduced into the outer isolation space 110-1 is sucked from the foreign matter removal unit 300 through the foreign matter absorption hole 101 formed on the body 100, and the outer isolation space It is to prevent zinc powder from accumulating at a height higher than (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 putting the suction nozzle onto the outer isolation space 110-1, as shown in FIG. 9. When the screw 310 is rotated together, the absorption space 320 and the outer isolation space 110-1 of the foreign matter removal unit 300 communicated with the outer isolation space 110-1 through the absorption hole 101. It is of course possible to allow the zinc powder located in the outer isolation space 110-1 to be absorbed by the foreign material removal unit 300 through the movement of the fluid generated by the pressure difference.

In addition, referring to FIG. 7, the snorkel 1000 according to the present invention is located in the outer isolation space 110-1 to limit a change in the separation distance A between the inner peripheral surfaces of the vertical portion 122 and the body 100. The reinforcement unit 140 may be further included.

In detail, the present invention formed the body 100 of a material having a certain rigidity or higher to increase heat resistance, and prevented the body 100 from being corroded by plating aluminum on the surface of the body 100. In the case of the keel 1000, deformation may occur because it is always exposed to more than a certain amount of heat, so 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 distance between the body 100 and the inner circumference (A) is to be kept constant at all times.

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 material removing part 300 and the body 100.

In detail, when the body 100 is deformed by heat applied from the outside, the debris removal part 300 and the body 100 are separated from each other, and the debris removal part 300 through the absorption hole 101 Since absorption of the zinc powder into the absorption space 320 may not occur well, in the present invention, the absorption hole 101 communicates with the lower side of the body 100 where the absorption hole 101 is formed and the absorption hole 101 is absorbed. The lower side of the foreign material removal unit 300 having the absorption space 320 for sucking the zinc powder located in the outer isolation space 110-1 through the ball 101 is connected to the deformation prevention unit 400 to each other. It solved the problem that occurs when the binding of the is released.

At this time, the deformation preventing part 400 may be a form in which one side in the longitudinal direction is inserted and coupled into the body 100 and the other side in the longitudinal direction is inserted and coupled to the foreign material removal unit 300 as shown in FIG. 9. However, in addition to this, 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 various coupling structures such as a structure in which the foreign matter removal part 300 is welded or bolted to the outer peripheral surface. I never do that.

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

In detail, in the present invention, the body 100 has an inner isolation space 110-2, which is a space through which the movement passage 110 is plated (ST) 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 submerged on the plating tank (3) so that the outer isolation space (110-1) and the inner isolation space The zinc solution of the plating bath 3 is positioned on the (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 unit 120, the zinc powder introduced into the outer isolation space 110-1 is externally isolated. The problem of stagnating in the zinc solution located on the space 110-1 may occur.

Therefore, in the present invention, the inner isolation space 110-2 and the outer isolation space 110-1 communicate with each other through the communication hole, so that the flow of zinc solution on the inner isolation space 110-2 is the outer isolation space ( It is to prevent the stagnation of powder submerged on the zinc solution in the outer isolation space (110-1) by allowing it to be delivered to the zinc solution located on 110-2).

In addition, the communication hole is disposed on the left and right sides of the vertical portion 122 and opposite to the absorption hole 101, the zinc powder located on the outer isolation space 110-1 through the absorption hole 101 and When the zinc solution flows into the foreign matter removal 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 is possible to induce the movement of the zinc powder accumulated in 1).

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

In addition, the communication hole is located below the absorption hole 101, the movement of the zinc solution moving from the inner isolation space 110-2 to the foreign matter removal unit 300 through the outer isolation space 110-1. It is recommended to make it happen from the lower side to the upper side.

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

A: Distance
1: heating furnace 2: snout
3: plating bath
100: body 101: foreign matter absorption hole
110: moving passage 110-1: outer isolation space
120: dam portion 121: horizontal portion
122: vertical portion 122-1 slope
130: guide portion 131: direction adjustment plate
140: reinforcement
200: nitrogen release unit
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 plated object ST heated in the heating furnace 1 passes, the other side in the longitudinal direction is immersed in the plating tank 3, and the snout 2 is inside. Includes a body 100 on which the movement passage 110 through which the object to be plated ST moves to the plating tank 3 is formed;
The body 100 is characterized in that the surface is aluminum plated, snorkel.
According to claim 1,
The horizontal portion 121 horizontally coupled to the other end portion in the longitudinal direction, and the vertical portion 122 where one side in the longitudinal direction is coupled to the horizontal portion 121 and the other side in the longitudinal direction is bent into the movement passage 110. It characterized in that it comprises a dam portion 120 made, snorkel.
According to claim 2,
Further comprising a nitrogen discharge unit 200 for discharging nitrogen to the mobile passage 110,
The nitrogen introduced into the movement passage 110 through the nitrogen discharge part 200 on the inner circumferential surface of the body 100 is positioned between the other end in the longitudinal direction of the vertical part 122 and the inner wall of the body 100. Characterized in that the guide portion 130 is guided to the outer isolation space (110-1) is formed, snorkel.
According to claim 3,
The guide portion 130 is disposed on the inner side of the body 100 and spaced apart from the inner wall of the body 100, characterized in that it comprises a direction control plate 131 for adjusting the movement path and the emission angle of nitrogen, snow Kel.
The method of claim 4,
The vertical portion 122 is a snorkel characterized in that the inclined surface (122-1) is formed on the other outer peripheral surface in the longitudinal direction facing the movement passage 110.
The method of claim 5,
Further comprising a foreign matter removal unit 300 for sucking the foreign matter located in the outer isolation space (110-1),
The outer peripheral surface of the body 100, characterized in that the outer isolation space (110-1) and the foreign matter absorption hole 101 for connecting the foreign matter removal unit 300 is formed, snorkel.
The method according to any one of claims 3 to 6,
Located in the outer isolation space (110-1), characterized in that it further comprises a reinforcing portion (140) for limiting the change in the separation distance (A) of the inner peripheral surface of the vertical portion (122) and the body (100) Kel.
According to claim 3,
The dam portion 120 is a snorkel, characterized in that a communication hole communicating with the movement passage 110 and the outer isolation space (110-1) is formed on the vertical portion (122).
In the snorkel manufacturing method for producing the snorkel according to any one of claims 1 to 6,
A plating step of plating aluminum on the surface of the body 100 by an aluminizing technique (S100);
It characterized in that it comprises; an alloy layer diffusion step (S200) for diffusing the alloy layer 3 formed between the body 100 and the aluminum plating layer 2 by heat-treating the body 100 plated with aluminum; Snorkel manufacturing method.
The method of claim 9,
The alloy layer diffusion step (S200) is characterized in that made for 6 hours to 8 hours at 850 degrees to 950 degrees, snorkel manufacturing method.

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