KR102284029B1 - Sealing part for gasket and gasket comprising the same - Google Patents

Abstract

The present invention relates to a gasket provided between pipe flanges to prevent leakage.

Description

Sealing member for gasket and gasket including same

The present invention relates to a sealing member provided between pipe flanges and used for a gasket to prevent leakage, and a gasket including the same.

A gasket is a generic term for a static seal that prevents leakage by being fastened with bolts to the fixed joint surfaces of pressure vessels, pipe flanges, and mechanical devices. Depending on the type of shape, material, etc. are used. In contrast to this, the generic name of the dynamic yarn used in the moving part is called packing.

Even for the same type of seal, the name used varies depending on the place where it is used. For example, an O-ring (O-ring) used for fixing is called an O-ring gasket, and Even if it is the same O-ring, it is called O-ring packing. However, although these names are standardized, they are not strictly used.

1 is a view showing one usage aspect in which a general gasket is used. The gasket 100 is installed between the joint surfaces between the pipe flanges 200 , and the gasket 100 thus installed serves to prevent the fluid flowing inside the pipe from leaking to the outside. After the gasket 100 is mounted on the pipe flange 200, the bolt 400 is inserted into the opening of the pipe flange 200 so that the joint surface of the pipe flange 200 does not spread, and both sides of the bolt are screwed into the nut 300 ) is tightened. Before coupling the nut 300 to the bolt 400 , the metal washer 610 and the insulation washer 620 may be coupled first. In addition, the bolt 300 inserted into the opening of the pipe flange 200 may be inserted into the insulating sleeve 500 to be inserted into the pipe flange 200 .

Patent Document 1 (Korean Patent Publication No. 10-2016-0059388 (published on May 26, 2016)) discloses a gasket having a sealing member that prevents double leakage even under vacuum and high pressure conditions.

2 and 3 are a perspective view and a cross-sectional view showing a second embodiment of Patent Document 1 above.

The invention of the gasket shown in Patent Document 1 includes a central layer 100 made of a metallic material, and a first layer 210 and a second layer 220 made of an insulating material disposed in the same shape as the central layer on the upper and lower surfaces of the central layer. be prepared In addition, in Patent Document 1, the first and second grooves penetrate the first layer 210 and the second layer 220, respectively, and are formed up to the central layer 100, and more than the first and second grooves. A third groove and a fourth groove are formed in the first layer 210 and the second layer 220, respectively, farther from the center of the gasket.

In the first and second grooves, a first sealing member 410 and a second sealing member 420 having a trapezoidal shape for preventing leakage, respectively, are opened in the direction toward the center of the gasket, and a first spring ( 510 and the second spring 520 are respectively inserted therein. Additionally, a third sealing member 610 and a fourth sealing member 610, which are metal O-ring members, are inserted into the third and fourth grooves to prevent double leakage.

However, in the case of the sealing member shown in Patent Document 1, particularly the third and fourth sealing members, it is only to insert the O-rings into the third and fourth grooves, but it has a variable function that can adjust the degree of sealing by itself according to the leaking fluid. Since it does not have, there is a problem that the sealing effect is not large. Furthermore, since Patent Document 1 does not describe an embodiment or a structure applicable in a high-temperature environment in which an insulating material can be melted, there is a problem that the sealing purpose cannot be achieved in a high-temperature environment.

Korean Patent Publication No. 10-2016-0059388 (published on May 26, 2016)

An object of the present invention is to propose a gasket including a sealing member having a novel structure that more effectively prevents leakage on a flange joint even in a vacuum and high pressure environment.

Another object of the present invention is to propose a structure in which flanges can be electrically insulated while using a sealing member made of a metal material.

Further, an object of the present invention is to improve durability of the gasket itself in a high-temperature environment and to reduce deterioration in product durability due to abrasion between the gasket and the flange.

To this end, the present invention provides a mounting groove provided with a height smaller than the height of the sealing member, and a sealing member for defending the sealing portion mounted on the mounting groove. In this case, the sealing part may be a V-type or W-type spiral wound, and the mounting groove may be provided on the inside of the sealing member and open in an inward direction.

Additionally, the mounting groove may be provided on the outside of the sealing member and open in an outward direction.

In addition, the mounting groove may be provided at the center of the sealing member.

As another embodiment, the outer upper surface of the sealing member may have a wavy shape in which an upper side is rounded, or an inner upper surface may have a wavy shape in which an upper side is rounded.

In addition, an outer lower end of the sealing member may include an inward cutting portion cut in an inward direction, and an inner lower end may include an outward cutting portion cut in an outward direction.

The present invention provides an insulating gasket including the sealing member described above, wherein the insulating gasket includes a central layer and first and second layers respectively provided on upper and lower surfaces of the central layer, the first and second layers The above-described sealing member may be provided in the first groove portion and the second groove portion respectively provided in the layer.

The first and second layers of the insulating gasket may be made of an electrically insulating material, and the central layer may be made of a metallic material, wherein the first and second grooves pass through the first and second layers, respectively. up to the central layer.

Meanwhile, the insulating gasket may further include a bottom insulating layer between the central layer and the sealing member.

In another embodiment, in the insulating gasket, the first layer and the second layer are made of a metallic material, and the central layer is made of an insulating material, and in this case, the first and second grooves are the first and second layers, respectively. formed only up to

According to the present invention, it is possible to provide a gasket having an excellent sealing effect through a sealing member having a spiral-wound shape different from that of the conventional sealing member structure.

In addition, the gasket including the sealing member according to the present invention has an effect that galvano corrosion does not occur because it is electrically insulated.

Furthermore, according to the present invention, durability of the gasket itself can be improved in a high-temperature environment, and deterioration of product durability due to wear between the gasket and the flange can be reduced.

1 is a view showing one usage aspect in which a general gasket is used.
2 and 3 are perspective and cross-sectional views illustrating the gasket shown in Patent Document 1 above.
4 and 5 are a perspective view and a cross-sectional view of a gasket having a sealing member having a sealing portion of the V-shaped spiral wound according to the present invention.
FIG. 6 is an enlarged cross-sectional view of the sealing member of the gasket shown in FIGS. 4 and 5 .
7 and 8 are views illustrating an embodiment of a sealing member different from the sealing member shown in FIG. 6 .
9(a) to 9(c) are views showing another embodiment of the sealing member shown in FIGS. 6 to 8, respectively.
10(a) to 10(c) are cross-sectional views of a gasket having a sealing member having a sealing portion of a W-shaped spiral wound according to the present invention.

Prior to the description of the present invention, due to the characteristics of the disk-shaped gasket structure, one cross section of the gasket will be entirely described for convenience of description and agreement between the drawings and the description. However, due to the characteristics of the disk-shaped gasket in which the central portion is opened, those skilled in the art are provided with a strip shape only by explaining the cross-section of each configuration with reference to the drawings and description, and based on this, the overall gasket of the disk shape is provided. Can understand shapes and features. In addition, in order to avoid overlapping description, content overlapping with the prior art will be omitted and the features of the present invention will be mainly described.

In the present description, "inner (I)" means a direction toward the central axis in a component having a band shape, and "outer (O)" means a direction away from the central axis. In addition, "upward" means an upward direction in the drawing, and "downward" means a downward direction in the drawing.

Hereinafter, a gasket according to the present invention will be described with reference to FIGS. 4 and 5 , and the sealing members 61 and 62 used in the gasket according to FIGS. 4 and 5 will be described with reference to FIG. 6 .

4 is an overall perspective view of the gasket according to the present invention, and FIG. 5 is a cross-sectional view of the gasket of FIG. 4 . In the gasket according to the first embodiment of the present invention, the first layer 21 and the second layer 22 having the same shape as the center layer are formed on the upper and lower surfaces of the center layer 10 in the shape of a disk having an open center. be prepared As shown in FIG. 5 , a first groove portion 310 and a second groove portion 320 are provided on the first layer 21 and the second layer 22 , respectively, the first layer 21 and the second layer A part of the central layer 10 is formed through (22). However, it is not formed through the central layer 10 . In the first embodiment, the central layer 10 is a metal material, and the first layer 21 and the second layer 22 are electrically insulating materials.

The first sealing member 61 and the second sealing member 62 are provided and disposed inside the first and second grooves 310 and 320, respectively to prevent the fluid leaking from the flange from going out to the outside. It acts as a sealant. The first sealing member 61 and the second sealing member 62 are preferably formed of a metal material, but are not limited thereto. Since the first sealing member 61 and the second sealing member 62 have the same shape provided symmetrically in the upper and lower sides, the first sealing member 61 will be described as a representative for convenience of description below.

Hereinafter, the configuration and function of the first sealing member 61 will be described in detail with reference to FIG. 6 . 6 is an enlarged view of the right side of the cross-section of the first sealing member 61 shown in FIG. 5, and when viewed from FIG. 6, the left side is the inward direction (I) toward the central axis, and the right side is the outside direction ( O).

The first sealing member 61 shown in FIG. 6 has a belt shape to be inserted into the belt-shaped first groove portion 310, and in order to increase the sealing effect, the height of the sealing member is the first groove portion (or the second groove portion). ) is preferably provided larger than the height of the.

The first sealing member 61 has a mounting groove 611 in which a sealing part 610, which will be described later, is mounted. The position of the mounting groove 611 may vary depending on the embodiment, and as shown in FIGS. 7 and 8 , it is provided on the inside of the sealing member 611a and is formed to be opened inwardly (FIG. 6), It may be provided on the outside of the sealing member (611 b) and open to the outside (FIG. 7), or provided at the center of the sealing member (611c) (FIG. 8). Such a mounting groove may be formed by cutting a sealing member made of a metal material in a right angle shape. At this time, since the height of the mounting groove 611 is provided to be smaller than the height of the sealing member, as shown in FIG. 6 , it is preferable that the bottom surface on which the sealing part 610 is mounted is formed such that a certain portion exists.

The sealing member 61 is provided with a sealing part 610 to seal the fluid flowing out from the inside direction. As a preferred embodiment, the sealing part 610 has a spiral wound shape, and may have a high sealing effect inherent to the spiral wound at high temperature and high pressure. The spiral wound is formed by repeatedly winding a hoop and a filler alternately, and the hoop is formed in a V shape 610v consisting of two moe and one trough, and the direction of the two moe of the hoop. is characterized in that it faces the outside of the gasket. The filler may be formed of any one of graphite, ceramic, mica, or a combination thereof. That is, the filler may be made of a non-asbestos material. As a preferred embodiment, the height of the sealing part 610 is preferably greater than the height of the mounting groove 611 .

According to a preferred embodiment, the first wear-resistant layer 613 may be further provided on the upper surface 615 of the first sealing member 61 . As shown in the upper right of FIG. 6 , the first wear-resistant layer 613 has a plate shape having a rectangular cross-section and has a band shape, but is not provided on the entire upper surface of the first sealing member 61 but on the side It is preferable to be provided only on the upper surface. The first wear-resistant layer 413 is to reduce abrasion occurring in a high-temperature environment between the first sealing member 41 and the flange and at the same time additionally seal the fluid leaked from the C-ring shape. In addition, when a graphite material is used as the first wear-resistant layer, the wear-resistant layer 413 has high durability even at high temperatures, and further has an advantage of achieving electrical insulation between the flange and the sealing member.

As another embodiment according to the present invention shown in FIG. 6 , the outer upper surface 615 of the first sealing member 61 may have a wavy shape 615a with a rounded upper end. This shape 615a is configured to improve sealing properties with the first wear-resistant layer 613 and to prevent breakage. The first wear-resistant layer 613 and the outer upper surface of the first sealing member can exhibit more improved sealing properties by contacting the wavy shape 615a and the first wear-resistant layer 613 than the face-to-face contact, The wavy shape of which the upper end is rounded has an effect of reducing damage to the first wear-resistant layer.

According to a preferred embodiment, the first sealing member 61 may further include a second wear-resistant layer 614 above and below the sealing part. This is a configuration similar to the above-described first wear-resistant layer 613, and is provided to reduce wear between the upper end of the sealing unit 610 and the flange, and between the lower end of the sealing unit and the bottom surface of the mounting groove of the sealing member. According to the example shown in FIG. 6, when the second wear-resistant layer 614 is provided at the upper end and lower end of the sealing part, the vertical height of the second wear-resistant layer located on the upper end of the sealing part is the first wear-resistant layer ( 613) can be configured higher.

As an embodiment of the present invention shown in FIG. 6 , an inward cutting portion 617a cut in an inward direction may be provided at an outer lower end of the first sealing member 61 . The inward cutting portion 617a prevents the outer lower end of the first sealing member 61 from physically contacting the center layer 10 . In this embodiment, the first groove portion 310 into which the first sealing member 61 is inserted is formed up to the central layer 10, and since the first sealing member 61 and the central layer 10 are made of a metal material, physically Since there is a problem that galvano corrosion may occur when in contact, it is possible to physically insulate the first sealing member 61 and the central layer 10 by providing such an inward cutting part 617 . The shape in which the inward cutting portion 617a is cut may have a rectangular cross-section or a shape chamfered so as to be inclined at the outer lower end, but is not limited thereto, and the outer lower end of the first sealing member 61 is not limited thereto. and any cutting shape that can physically insulate between the central layer 10 and the central layer 10 .

According to the embodiment of the present invention shown in FIG. 6 , in order to physically insulate the inner lower end 6112 of the first sealing member 61 and the central layer 10 , the inner wall of the first groove portion 310 . 311 and the inner end of the first sealing member 61 may be spaced apart from each other by a predetermined distance. In this case, the left and right widths of the cross section of the first sealing member 61 should be smaller than the left and right widths of the cross section of the first groove portion 310 . In addition, the fact that the inner end of the inner end is spaced apart from the inner wall 311 of the first groove at a predetermined distance in this way is that the inner lower end of the sealing member 61 made of a metal is electrically insulated from the central layer 10 and At the same time, it is possible to exert the effect of increasing the sealing property of the sealing part by the pressure of the leaked fluid.

A bottom insulating layer 619 is provided on the bottom surface of the first sealing member 61 to electrically insulate between the first sealing member 61 made of a metal material and the center layer 10 made of a metal material. The material of the bottom insulating layer may be, for example, an electrical insulating material.

7 and 8 are views showing another embodiment of a gasket according to the present invention. In order to avoid overlapping description, only differences from the first sealing member 61 of the embodiment described with reference to FIG. 6 will be mainly described.

7 is formed by changing the left and right sides of the first sealing member shown in FIG. 6 to be symmetrical. The mounting groove 611b shown in FIG. 7 is provided on the outside of the first sealing member and is opened in the outward direction (O). has been formed The basic configuration corresponds to that described in FIG. 6 , but unlike FIG. 6 , an outward cutting part 617b cut outwardly is provided at the inner lower end to be electrically insulated from the central layer. In addition, similarly to FIG. 6 , the inner upper end is provided in a wavy shape 615b in which the upper side is rounded.

"형상으로 형성되어 있다. 기본적인 구성은 도 6 및 도 7에서 설명한 것과 대응되되, 도 6 및 도 7과 달리 외측 하단 및 내측 하단 양쪽에 각각 외측 방향 및 내측 방향으로 절삭된 외향 절삭부(617b) 및 내향 절삭부(617a)가 모두 구비되어 내측 및 외측 모두 중심층과 전기적 절연된다. 이와 같이 양측 모두 중심층과 절연이 되기 때문에, 도 6에 도시된 실시예와는 달리, 제1 실링부재의 너비는 제1 홈부(310)과 동일하게 구비되어도 좋다. 또한, 도 8에 따른 실링부재는 내측 상단의 물결 형상(615b) 및 외측 상단의 물결 형상(615a)을 모두 구비하는 것이 바람직하다. 이와 같이, 도 8은 도 6 및 도 7의 장점을 결합한 형태로서, 이중으로 유출되는 유체를 밀폐시킬 수 있기 때문에 실링 효과를 극대화 할 수 있다. 8 is a view showing an embodiment in which the first sealing member shown in FIGS. 6 and 7 is combined. The mounting groove 611c shown in FIG. 7 is provided at the center of the first sealing member to view the cross section. at the time "

It is formed in a "shape. The basic configuration corresponds to that described in FIGS. 6 and 7, and unlike FIGS. 6 and 7, an outward-cutting part 617b cut in the outward and inward directions on both the outer lower end and the inner lower end, respectively. and inward cutting portions 617a are provided so that both inner and outer sides are electrically insulated from the central layer. The width may be the same as that of the first groove portion 310. In addition, the sealing member according to Fig. 8 preferably has both a wavy shape 615b at the inner upper end and a wave shape 615a at the outer upper end. Similarly, FIG. 8 is a form that combines the advantages of FIGS. 6 and 7 , and can maximize the sealing effect because the double flowing fluid can be sealed.

9(a), 9(b) and 9(c) are another embodiment of a sealing member provided in a flat shape without a wavy shape on the outer upper end and inner upper end in FIGS. 6, 7 and 8, respectively. is a diagram showing

Figures 10 (a), 10 (b) and 10 (c) is a sealing provided with a W-type spiral wound sealing portion 610w, not the V-type spiral wound sealing portion of FIGS. 6, 7 and 8, respectively. It is a view showing another embodiment of the member.

Hereinafter, another embodiment of the gasket capable of maintaining the sealing effect in a high-temperature environment will be described with reference to FIGS. 11 to 13 .

The sealing member shown in FIG. 11 is basically a perspective view and a cross-sectional view of a gasket to which the embodiment of the first sealing member shown in FIG. 6 is applied, and FIGS. 12 and 13 are the first sealing member shown in FIGS. 7 and 8, respectively. As a cross-sectional view of the gasket to which the embodiment of is applied, since the shape and function of the sealing member itself are the same as those already described, other differences will be mainly described.

The material of the central layer 10 of the embodiment shown in FIGS. 11 to 13 is provided with an insulating material, unlike the one described above. In addition, the first layer 21 and the second layer 22 provided on the upper and lower surfaces of the central layer 10 made of the insulating material are made of a metal material. This is to avoid exposing an insulating material with low heat resistance to the outside in a high temperature environment.

Furthermore, in the embodiment shown in FIGS. 11 to 13 , the first and second grooves 310 and 320 into which the first and second sealing members 61 and 62 are inserted are different from the embodiments described above. , since the first layer and the second layer are insulated by the central layer of the insulating material, they are not formed through the first layer 21 and the second layer 22 but are formed in the first layer and the second layer.

Claims (15)

An insulating gasket comprising a sealing member for sealing the outflow of fluid,
a first layer 21 and a second layer 22 provided on the central layer 10 and the upper and lower surfaces of the central layer, respectively;
a first groove portion 310 and a second groove portion 330 provided in the first layer 21 and the second layer 22, respectively;
a mounting groove 611 provided with a height smaller than the height of the sealing member; and
Including; sealing part 610 mounted on the mounting groove;
The mounting groove 611 is provided on the inside of the sealing member and is formed to be opened in an inward direction,
The insulating gasket, characterized in that the outer lower end of the sealing member is provided with an inward cutting portion (617a) cut in the inward direction.
The method of claim 1,
The insulating gasket, characterized in that the outer upper surface (615a) of the sealing member with the support groove as a center has a wavy shape in which the upper side is rounded.
An insulating gasket comprising a sealing member for sealing the outflow of fluid,
a first layer 21 and a second layer 22 provided on the central layer 10 and the upper and lower surfaces of the central layer, respectively;
a first groove portion 310 and a second groove portion 330 provided in the first layer 21 and the second layer 22, respectively;
a mounting groove 611 provided with a height smaller than the height of the sealing member; and
Including; sealing part 610 mounted on the mounting groove;
The mounting groove 611 is provided on the outside of the sealing member and is formed to be opened in an outward direction,
Insulation gasket, characterized in that the inner lower end of the sealing member is provided with an outward cutting portion (617b) cut outward.
4. The method of claim 3,
The insulating gasket, characterized in that the inner upper surface (615b) of the sealing member around the mounting groove has a wavy shape with an upper side rounded.
An insulating gasket comprising a sealing member for sealing the outflow of fluid,
a first layer 21 and a second layer 22 provided on the central layer 10 and the upper and lower surfaces of the central layer, respectively;
a first groove portion 310 and a second groove portion 330 provided in the first layer 21 and the second layer 22, respectively;
a mounting groove 611 provided with a height smaller than the height of the sealing member; and
Including; sealing part 610 mounted on the mounting groove;
The mounting groove 611 is provided at the center of the sealing member,
Insulation gasket, characterized in that the inner lower end and the outer lower end of the sealing member are provided with an outward cutting portion (617b) and an inward cutting portion (617a) cut in an outward direction and an inward direction, respectively.
6. The method of claim 5,
The insulating gasket, characterized in that the inner upper surface (615b) and the outer upper surface (615a) with the support groove as a center have a wavy shape with an upper side rounded.
6. The method of any one of claims 1, 3 or 5,
Insulation gasket, characterized in that it further comprises a wear-resistant member (614) on the upper and lower sides of the sealing part.
6. The method of any one of claims 1, 3 or 5,
Insulation gasket, characterized in that it further comprises a wear-resistant member (613) above the inner upper surface (615b) or the outer upper surface (615a) of the sealing member.
6. The method of any one of claims 1, 3 or 5,
The insulating gasket, characterized in that the sealing portion is a V-type or W-type spiral wound.
6. The method of any one of claims 1, 3 or 5,
The insulating gasket, characterized in that the first layer (21) and the second layer (22) are made of an electrically insulating material, and the central layer (10) is made of a metal material.
11. The method of claim 10,
The insulating gasket, characterized in that the first groove portion (310) and the second groove portion (320) are formed up to the central layer (10) through the first layer (21) and the second layer (22), respectively.
11. The method of claim 10,
An insulating gasket, characterized in that it further comprises a bottom insulating layer (619) between the central layer (10) and the sealing member.
6. The method of any one of claims 1, 3 or 5,
The inner wall 311 of the first and second grooves and the inner side 6112 of the sealing member are spaced apart from each other by a predetermined distance, so that the sealing member and the central layer 10 are insulated and the sealing member 610 . Insulation gasket, characterized in that the sealing property of the increase.
6. The method of any one of claims 1, 3 or 5,
The insulating gasket, characterized in that the first layer (21) and the second layer (22) are made of a metal material, and the center layer (10) is made of an insulating material.
6. The method of any one of claims 1, 3 or 5,
The insulating gasket, characterized in that the first groove portion (310) and the second groove portion (320) are formed only up to the first layer (21) and the second layer (22), respectively.

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