KR101567235B1 - Shielding system for the steam turbine plant lubricating oil tank - Google Patents

Abstract

Disclosed is a shielding system for a lubricating oil tank of a steam turbine facility. The shielding system is installed in an interior of a lubricating oil tank including a first receiving area receiving lubricating oil to be supplied to a turbine and a bearing of a generator, and a second receiving area receiving lubricant oil collected after being supplied to the bearing to shield a space between the first receiving area and the second receiving area. The shielding system comprises: a sealing member positioned inside the lubricating oil tank to be arranged in the space between the first receiving area and the second receiving area to seal the space between the first receiving area and the second receiving area; an insertion part coupled to an interior surface of the lubricating oil tank including a first slot part allowing an edge of the sealing member to be inserted thereinto; a first close contact bar installed in the interior of the insertion part; and a second close contact part installed in one side of the sealing member and coupled to the first close contact bar when the sealing member is inserted into the insertion part.

Description

TECHNICAL FIELD [0001] The present invention relates to a shielding system for a lubricating oil tank of a steam turbine,

The present invention relates to a shielding system, and more particularly to a steam turbine plant for shielding between two separated areas in a lubricant tank during cleaning of a supply and recovery system of a lubricant used for cooling a steam turbine bearing of a power plant and for hydrogen- To a shielding system for a lubricating oil tank.

A generator is an energy conversion device that converts chemical energy or kinetic energy into electrical energy. In the case of thermal power plants, Turbine is responsible for transferring the energy obtained by burning the fuel to the generator. A turbine is a mechanical device that uses a flow of compressible fluid such as steam or gas to obtain a rotational force with a collision force or reaction force.

The turbine is divided into a steam turbine using steam and a gas turbine using combustion gas. Such a turbine is made up of a number of stages, which is a unit of a turbine consisting of a nozzle and a rotating blade. The turbine, which has obtained the rotational force from the steam or the combustion gas, is finally connected to the rotor of the generator to generate electric power by driving the rotor.

That is, the rotor of the turbine and the generator is connected on the same axis and rotates together. The rotation axis of the turbine and the generator rotor is supported by a plurality of journal bearings and thrust bearings.

Bearings such as journal bearings and thrust bearings are lubricated by a separate lubrication device when rotating the turbine. Oil Flushing of the Lubrication System In other words, the lubricant cleaning operation is to remove foreign substances in the piping before commissioning the power plant construction or oil flushing because the bearing or lubricant system is contaminated in the turbine disassembly state during powerplant planning preventive maintenance. An oil flushing operation, that is, a lubricating oil cleaning operation, means a lubricating system such as a mechanical device, a turbine, or an engine, or a foreign substance adhered to a piping device of a hydraulic system, or an operation of removing rust using oil.

The conventional oil cleaning operation for the turbine and generator rotor bearings will be described as follows.

1 is a view for explaining an oil cleaning operation of a conventional turbine and generator rotor bearing.

Referring to FIG. 1, the oil 102 stored in an oil tank 101 is preheated by an electric heater 104. If the temperature of the oil 102 is low, the viscosity of the oil 102 is low and the fluidity of the oil 102 is low, so that the oil 102 is not circulated well.

The preheated oil 102 is pumped by the oil pump 103 and transferred to the bearing 106 through the oil supply pipe 105. On the other hand, a supply strainer 107 is provided in the middle of the oil supply pipe 105 to filter out foreign matter in the oil 102 supplied from the oil tank 101.

The oil 102 delivered to the bearing 106 is recovered to the oil tank 101 through the oil return pipe 108 after cleaning the foreign matter in the bearing 106 area.

In this process, the oil recovered after the cleaning of the bearing is filtered by the recovery part strainer 109, but is not completely filtered, and the residual oil is recovered in the oil tank. Therefore, the residual foreign matter contained in the oil recovered into the oil tank may contaminate the inside of the oil tank. Therefore, the inside of the oil tank is required to be cleaned.

However, since it takes a long time to clean a large oil tank, the inside of the oil tank is divided into two areas to prevent this. That is, the interior of the oil tank is divided into a first receiving area for receiving oil for supplying to the bearings and a second receiving area for lubrication of the bearings or for storing the recovered oil after the bearings are supplied to the bearings for cleaning . In such a case, the first accommodating region and the second accommodating region can be fluidly communicated at normal times, and are sealed using a shielding system during the cleaning operation of the oil tank.

The shielding system is installed at the time of the oil cleaning operation to block the second receiving area from the first receiving area, and the oil containing foreign matter is collected only into the second receiving area. Whereby the foreign matter is present only in the second accommodation area. Therefore, during the cleaning operation of the oil tank, only the second accommodation area is cleaned. The oil containing the foreign substance is discharged into a separate tank for cleaning the second receiving area.

The conventional shielding system is configured such that a plate is inserted into slots provided between the first receiving area and the second receiving area to seal between the first receiving area and the second receiving area, Respectively.

However, such a conventional shielding system has difficulties in tightly sealing between the first receiving area and the second receiving area in the oil tank. That is, in the conventional shielding system, when the oil level is lowered during the drainage for cleaning the second receiving area, a difference is generated between the first receiving area and the level, and due to the water head difference, the sealing material of the installed plate is pressed to hold the airtight It is difficult to maintain a perfect airtightness in the slot structure. As a result, leakage of oil containing foreign matter from the second receiving area to the first receiving area is generated, and the whole of the oil tank is contaminated.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a steam turbine system for a steam turbine of a power plant, which can reliably seal between two separated areas in a lubricant tank and seal oil between two areas of the lubricant tank, The present invention is to provide a shielding system for a lubricant tank of a steam turbine facility which can surely prevent the lubricating oil tank from being tightly closed while rapidly sealing the two regions of the lubricating oil tank.

According to an aspect of the present invention, there is provided a shielding system comprising: a turbine; a first receiving area for receiving lubricating oil to be supplied to bearings of the turbine and generator; and a second receiving area for receiving lubricating oil recovered after being supplied to the bearing A shielding system for shielding between said first receiving area and said second receiving area, provided inside said lubricating oil tank including said first receiving area and said second receiving area, A sealing member which is disposed in the first accommodation space and seals the first accommodation space and the second accommodation space; An insertion portion coupled to an inner surface of the lubricant tank and including a first slot portion into which an edge portion of the sealing member is inserted; A first tightening bar provided inside the insertion part; And a second adhesive bar installed at one side of the sealing member and engaging with the first adhesive bar when the sealing member is inserted into the insertion portion.

The first slot portion may include a first slot facing the entrance of the first slot portion, a second slot and a third slot perpendicularly connected to the first slot and facing each other.

Wherein the first adhesive bar comprises a first inclined surface, the second adhesive bar comprises a second inclined surface, and when the first adhesive bar and the second adhesive bar are engaged, the first inclined surface and the second inclined surface And can be combined to be in close contact with each other.

Wherein the sealing member comprises: a sealing plate inserted into the first slot portion; A sealing member attached to an edge region of one surface of the sealing plate; And a handle provided at one end of the sealing plate, and the second adhesive bar may be provided on the opposite side of the surface to which the sealing member is attached. For example, the sealing material may be made of a urethane material.

The shielding system may further include a pressing member inserted in the first slot portion and pressing the edge of the sealing member in the first slot portion.

The pressing member may include at least one plate inserted into the first slot portion. For example, the pressing member may include at least one first plate; And at least one second plate. In this case, the first plate and the second plate may be inserted into the second slot and the third slot in close contact with each other.

Wherein the first plate includes a third inclined surface and the second plate includes a fourth inclined surface and when the first plate and the second plate are engaged and inserted into the second slot and the third slot respectively The third inclined surface and the fourth inclined surface may be inserted into contact with each other.

One of the first plate and the second plate includes a handle, and the other of the first plate and the second plate may include a drawing hole.

On the other hand, the shielding system may further include a mesh member, and the insertion portion may further include a second slot portion, and the mesh member may be inserted into the second slot portion.

By using the shielding system according to the present invention, it is possible to reliably seal between the two separated areas in the lubricating oil tank of the steam turbine facility of the power plant, and to seal between the two areas of the lubricating oil tank as the sealing force improves, It is possible to reliably prevent the leakage of the lubricating oil leaking from the area containing the lubricating oil to the other area and facilitating the process of installing and separating the lubricating oil in the lubricating oil tank so that the process can be speeded up while sealing the two areas of the lubricating oil tank closely .

1 is a view for explaining an oil cleaning operation of a conventional turbine and generator rotor bearing.
2 is a cross-sectional view illustrating a state in which a shielding system according to an embodiment of the present invention is installed in a lubricant tank.
3 is an exploded perspective view showing a configuration of the shielding system shown in FIG.
4 is a plan view illustrating an assembled state of a shielding system according to an embodiment of the present invention.

Hereinafter, a shielding system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

2 is a cross-sectional view illustrating a state in which a shielding system according to an embodiment of the present invention is installed in a lubricant tank.

The shielding system of the present invention comprises a first receiving area 111 in which a lubricating oil for supply to a turbine and a generator bearing is received in a steam turbine facility of a power plant, and a second receiving area 111 in which lubricating oil recovered after being supplied to the bearing is received. And a shielding system for shielding between the first receiving area 111 and the second receiving area 112. The shielding system is provided inside the lubricating oil tank 10 including the first receiving area 112 and the second receiving area 112. [ The lubricant tank 10 is shown in Fig.

3 is an exploded perspective view showing a configuration of the shielding system shown in FIG.

3, the shielding system according to an embodiment of the present invention includes an insertion portion 100, a mesh member 200, a sealing member 300, a first adhesive bar 510, a second adhesive bar 520, And a pressing member (400).

The insertion portion 100 is positioned between the first receiving region 111 and the second receiving region 112 of the lubricant tank 10 and the mesh member 200, the sealing member 300, and the pressing member 400 So that it can be inserted into the lubricating oil tank (10). The insertion portion 100 may be opened toward one surface of the lubricant tank 10, that is, the top surface portion, so that the mesh member 200, the sealing member 300, and the pressing member 400 are inserted. The insertion portion 100 may include a first slot portion 110 and a second slot portion 120. The first slot portion 110 and the second slot portion 120 are formed by slots 111, 112, 121, 122 extending from the open portion of the insertion portion toward the bottom surface of the lubricant tank 10, And may include slots 113, 123 extending parallel to the open portion of the insert 100 at the bottom surface of the tank 10.

In this case, the first slot portion 110 includes a first slot 111 opposed to the inlet of the first slot portion 110, a second slot 112 perpendicularly connected to the first slot 111 and opposed to the first slot 111, And a third slot 113. The second slot portion 120 may include a fourth slot 121 opposed to the inlet of the second slot portion 120, And may include a fifth slot 122 and a sixth slot 123 facing each other. The slots 121, 122 and 123 constituting the first slot part 110 and the slots 121, 122 and 123 constituting the second slot part 120 are arranged in the longitudinal direction of the lubricant tank 10 And can be arranged so that they are spaced apart from each other.

The mesh member 200 is configured to filter foreign matters contained in the lubricant recovered after being supplied to the bearings accommodated in the second accommodation area 112. The mesh member 200 may be inserted into the insertion portion 100 and positioned between the first receiving region 111 and the second receiving region 112. [ For example, the mesh member 200 may include a frame member 210 having a rectangular frame shape and a mesh net 220 installed in the rectangular frame shape. The mesh member 200 may be inserted into the first slot portion 110 or the second slot portion 120. For example, the mesh member 200 can be inserted into the first slot 121, the second slot 122 and the third slot 123, in which the rim member 210 constitutes the second slot portion 120 have. The mesh member 200 may be located in the lubricant tank 10 at all times except for cleaning the foreign matter caught in the mesh net 220.

The sealing member 300 may be disposed in the first receiving area 111 so that the lubricating oil received in the second receiving area 112 when the user desires to clean the inside of the second receiving area 112 of the lubricant tank 10 does not flow into the first receiving area 111. [ (111) and the second accommodation area (112). For example, the sealing member 300 may include a sealing plate 310, a sealing member 320, and a handle 330.

The sealing plate 310 may be in the form of a rectangular plate having a size corresponding to the size of the insertion portion 100.

The sealing member 320 may be attached to an edge region of one surface of the sealing plate 310. As an example, the sealing material 320 may be a urethane material.

The handle 330 may be provided at one end of the sealing plate 310, for example, at the upper end of the sealing plate 310. [ The handle 330 is configured to grip the sealing plate 310 by hand when the sealing plate 310 is inserted into the insertion portion 100.

The sealing member 300 may be inserted into the first slot portion 110 or the second slot portion 120 to be positioned in front of or behind the mesh member 200. For example, the sealing member 300 can be inserted into the first slot portion 110 with the sealing plate 310 inserted therein. The first slot 111, the second slot 112, and the third slot 113 constituting the first slot 110, as shown in FIG. At this time, the sealing member 320 attached to the edge region of the sealing plate 310 can be closely attached to the inner surfaces of the respective slots 111, 112, and 113 to maintain airtightness.

The first adhesive bar 510 may be mounted on the lower end of one surface of the sealing plate 310 constituting the sealing member 300. At this time, the first adhesive bar 510 may be fixed to the opposite surface of one side of the sealing plate 310 to which the sealing material 320 is attached. The first adhesive bar 510 may extend parallel to the longitudinal direction of the lower end of the sealing plate 310. The length of the first contact bar 510 may be a length corresponding to or shorter than the length of the first slot 111 and the fourth slot 121. [

The first adhesive bar 510 may include a first inclined surface 511. The first inclined surface 511 may be formed on the opposite side of the surface of the first adhesive bar 510 that is fixed to the sealing plate 310. In this case, the first contact bar 510 may have a triangular or trapezoidal shape in cross section taken along a direction perpendicular to the longitudinal direction. For example, the first contact bar 510 may have a trapezoidal shape. The second contact bar 520 may be positioned between the first slot 111 and the fourth slot 121 in parallel.

The second contact bar 520 may include a second inclined surface 521. The second inclined surface 521 may be formed on the opposite side of the surface of the second contact bar 520 fixed to the surface located between the first slot 111 and the fourth slot 121. The second inclined surface 521 may be parallel to the first inclined surface 511 and may be opposed to the direction in which the fifth slot 122 and the sixth slot 123 are located, for example. In this case, the first contact bar 510 may have a triangular or trapezoidal shape in cross section taken along a direction perpendicular to the longitudinal direction. For example, the second adhesive bar 520 may have a trapezoidal shape.

The pressing member 400 is inserted into the slot 110 in which the sealing member 300 is inserted so that one surface of the sealing member 300 is pressed against the inner surface of the slot 110 opposite to one surface of the sealing member 300 Lt; / RTI > For example, the pressing member 400 may include a plurality of first plates 410 and a plurality of second plates 420.

The plurality of first plates 410 may have a rectangular plate shape. In this case, the length of the plurality of first plates 410 may be a length corresponding to the length of the second slot 111 and the third slot 112 constituting the first slot part 110, The width of one plate 410 may be a width or a width that corresponds to the width of the second slot 112 and the third slot 113. The plurality of first plates 410 may be inserted into the second slot 112 and the third slot 113, respectively.

The plurality of second plates 420 may be inserted into the second slot 112 and the third slot 113 together with the plurality of first plates 410. The plurality of second plates 420 may be equal to the length and width of the plurality of first plates 410.

The plurality of first plates 410 may include a third inclined surface 411 and the plurality of second plates 420 may include a fourth inclined surface 421. In this case, each of the first plate 410 and the second plate 420 may have a triangular or trapezoidal sectional shape cut along the longitudinal direction. For example, each of the first plate 410 and the second plate 420 may have a triangular shape.

When the plurality of first plates 410 and the plurality of second plates 420 are to be inserted into the second slot 112 and the third slot 113, The opposite surface of the first plate 411 may be inserted into the second slot 112 and the inner surface of the third slot 113 so that each first plate 410 may be inserted in a forward direction As shown in Fig. Each of the second plates 420 may be inserted such that the opposite side of the fourth inclined surface 421 is in contact with the opposite side of the surface of the sealing plate 310 on which the sealing material 320 is attached, The base plate 420 may be inserted in a triangular shape having a shape with the base of the triangular shape facing upward. According to this insertion mode, the third inclined surface 411 of each first plate 410 and the fourth inclined surface 421 of each second plate 420 can be inserted into contact with each other. This structure facilitates insertion when each first plate 410 and second plate 420 are inserted together into the second slot 112 and the third slot 113. [

One of the first plate 410 and the second plate 420 may include a handle 422 and the other one of the first plate 410 and the second plate 420 may include a plurality of lifting Hole 412. [ For example, the plurality of first plates 410 may include a plurality of lifting holes 412, and the plurality of second plates 420 may include a handle 422. [ In this case, a plurality of lifting holes 412 may be formed on the opposite sides of the base of the triangle shape of the plurality of first plates 410, and the handle 330 may be formed on the triangle shape of the plurality of second plates 420 May be provided at the end forming the base. The handle 330 and the plurality of lifting holes 412 allow the first plate 410 and the plurality of second plates 420 to be easily gripped.

The shielding system according to an embodiment of the present invention allows the lubricating oil to communicate with the first receiving region 111 and the second receiving region 112 at normal times, and when the moving system of the lubricating oil is to be cleaned, the lubricating oil tank 10 between the first receiving region 111 and the second receiving region 112. Each of these processes will be described below.

Normally, only the mesh member 200 is inserted into the insertion portion 100. At this time, the mesh member 200 is inserted into the fourth slot 121, the fifth slot 122, and the sixth slot 123 constituting the second slot part 120, 2 accommodating area 112. In this case,

In this state, the lubricating oil previously stored in the first receiving area 111 is supplied to the bearing side of the turbine and the generator through the supply line of the lubricating oil. The lubricating oil supplied to the bearing side lubricates the bearing, Respectively.

The lubricating oil recovered into the second housing area 112 is again transferred from the second housing area 112 to the first housing area 111 for lubrication of the bearing and then supplied to the bearing side through the supply line.

Here, the lubricating oil recovered into the second receiving area 112 includes foreign substances such as worn metal, ashes and lubricant residues generated during rotation of the turbine and the rotor of the generator, The area 112 is an area provided so that foreign matter contained in the lubricating oil does not spread over the entire interior of the lubricating oil tank 10. [

The lubricant recovered into the second receiving area 112 passes through the mesh net 220 of the mesh member 200 while moving to the first receiving area 111. At this time, The lubricating oil is moved to the first receiving region 111 while being filtered. However, even if the foreign matter contained in the lubricating oil is filtered through the mesh net 220 in this process, the foreign matter remains on the lubricating oil transfer system due to the repeated circulation of the lubricating oil. Therefore, periodic cleaning of the moving system of the lubricating oil should be performed. In this case, the lubricating oil is supplied to the moving system of the lubricating oil while the washing system of the moving system of the lubricating oil is performed. And is collected in the second receiving area 112. [ Therefore, periodic cleaning of the second receiving area 112 must be performed.

The sealing member 300 is inserted into the insertion portion 100 when the lubricating oil transfer system and the second receiving area 112 are to be cleaned. The sealing member 300 is inserted into the first slot 111, the second slot 112 and the third slot 121 of the first slot 110 by inserting the sealing plate 310 into the first slot 111, And then the pressing member 400 is inserted.

When the sealing plate 310 is inserted, the first adhesive bar 510 may be in close contact with the second adhesive bar 520. At this time, the first inclined surface 511 and the second inclined surface 521 may be in close contact with each other. In this case, the second adhesive bar 520 is engaged with the first adhesive bar 510 to prevent the sealing plate 310 from being pushed in the direction in which the second adhesive bar 520 is located, The sealing material 320 attached to the edge region of the first slot 111 can be closely adhered to the inner surface of the first slot 111.

The plurality of first plates 410 and the plurality of second plates 420 are inserted into the second slots 112 and the third slots 113, (411) and the second inclined surface (421) of each second plate (420) are in contact with each other. 4 is a plan view showing an assembly state of a shielding system according to an embodiment of the present invention. Since this process has been described in detail in the description of the pressing member 400, a detailed description thereof will be omitted.

When the plurality of first plates 410 and the plurality of second plates 420 are inserted into the second slots 112 and the third slots 113 as described above, The assembled first plate 410 and the second plate 420 press the sealing plate 310 toward the inner surfaces of the second slot 112 and the third slot 113, The sealing member 320 attached to the edge region of the second slot 112 closely contacts the inner surface of the second slot 112 and the third slot 113.

A part of the sealing material 320 located at the lower end of the sealing plate 310 closely contacts the inner surface of the first slot 111 in a state in which the first and second adhesive bars 510 and 520 are in close contact with each other, And the first plate 410 and the second plate 420 press both sides of the sealing plate 310 toward the inner surfaces of the second slot 112 and the third slot 113, The remaining area of the sealing material 320 located on both sides closely contacts the inner surfaces of the second slot 112 and the third slot 113 to closely contact the first receiving area 111 and the second receiving area 112 And the lubricating oil recovered into the second receiving area 112 can be reliably prevented from leaking into the first receiving area 111. [

In this state, the lubricating oil containing foreign matter in the second receiving area 112 is discharged to a separate tank connected to the second receiving area 112 through the drain pipe. Thereafter, an operator enters the second receiving area 112 to perform a removing operation of foreign matter remaining in the second receiving area 112. [

By using the shielding system according to one embodiment of the present invention, the sealing force of the sealing member 300, which seals between the first receiving area 111 and the second receiving area 112 of the lubricating oil tank, is improved It is possible to reliably prevent oil leaks from leaking from the second receiving area to the first receiving area during the cleaning process of the lubricating oil tank.

Also, it is easy to install and separate the sealing member 300 and the pressing member 400 for sealing the two regions of the lubricant tank, whereby the process can be speeded up while closely sealing the two regions of the lubricant tank.

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features presented herein.

10: Lubricant tank 11: First receiving area
12: second receiving area 100:
200: mesh member 300: sealing member
400: pressing member 510: first adhesive bar
520: second contact bar

Claims (10)

And a second receiving area in which lubricating oil to be supplied to the bearings of the turbine and the generator is received, and a second receiving area in which the lubricating oil recovered after being supplied to the bearing is received, A shielding system for shielding between said second receiving areas,
A sealing member disposed between the first housing region and the second housing region inside the lubricant tank and sealing between the first housing region and the second housing region;
An insertion portion coupled to an inner surface of the lubricant tank and including a first slot portion into which an edge portion of the sealing member is inserted;
A first tightening bar provided inside the insertion part; And
And a second adhesive bar installed at one side of the sealing member and engaging the first sealing bar when the sealing member is inserted into the insertion portion. The method according to claim 1,
Wherein the first adhesive bar comprises a first inclined surface,
Wherein the second adhesive bar comprises a second inclined surface,
And the first inclined surface and the second inclined surface are brought into close contact with each other when the first contact bar and the second contact bar are engaged. The method according to claim 1,
The sealing member
A sealing plate inserted into the first slot portion;
A sealing member attached to an edge region of one surface of the sealing plate; And
And a handle provided at one end of the sealing plate,
And the second adhesive bar is provided on the opposite side of the surface to which the sealant is attached. The method of claim 3,
Wherein the sealing material is made of a urethane material. The method according to claim 1,
Further comprising a pressing member inserted in the first slot portion and pressing the edge of the sealing member within the first slot portion. 6. The method of claim 5,
Wherein the pressing member includes at least one plate inserted into the first slot portion. 6. The method of claim 5,
The pressing member
At least one first plate; And
At least one second plate,
Wherein the first slot portion includes a first slot facing the entrance of the first slot portion, a second slot and a third slot perpendicularly connected to the first slot and facing each other,
Wherein the first plate and the second plate are in close contact with each other and are inserted into the second slot and the third slot, respectively. 8. The method of claim 7,
Wherein the first plate includes a third inclined surface,
The second plate includes a fourth inclined surface,
Wherein when the first plate and the second plate are engaged and inserted into the second slot and the third slot, the third inclined surface and the fourth inclined surface are inserted so as to be in contact with each other. 8. The method of claim 7,
Wherein one of the first plate and the second plate includes a handle,
And the other one of the first plate and the second plate includes a drawing hole. The method according to claim 1,
Wherein the shielding system further comprises a mesh member,
Wherein the insertion portion further comprises a second slot portion,
Wherein the mesh member is inserted into the second slot portion.

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