KR102330358B1 - A heat resistand and insulated gasket with multi sealing layer - Google Patents

Abstract

The present invention is an insulating warming gasket having a plurality of sealing parts, a gasket body made of a metal material having serrated bent parts on upper and lower surfaces, a plurality of sealing layers formed on the surface of the body to improve insulation and heat resistance, and an outward direction from the outer periphery of the body It is opened with an elastic body and includes a wing part for mounting an outer ring, and provides a gasket further comprising an organic/inorganic thin film coating layer formed on the surface of the sealing layer and an inorganic layer formed on the surface of the organic/inorganic thin film coating layer do. According to the present invention, by using an insulating high-temperature gasket having a plurality of sealing layers, the airtightness of the pipe used for fluid transport is increased, durability and heat resistance of the gasket can be maximized, and at the same time, the gasket is easy to manufacture and process. The versatility in high-temperature and high-pressure environments can be remarkably improved, and the sealing member can be easily attached and detached, so that the operation can be performed easily.

Description

A HEAT RESISTAND AND INSULATED GASKET WITH MULTI SEALING LAYER

The present invention relates to an insulating high-temperature gasket having a high-functionality multi-sealing layer that can be used in various industrial fields.

Gaskets, which are widely used industrially for sealing pipe connections, generally require insulation and heat resistance as basic characteristics. Insulation is required for insulation of the flange part or when galvanic (contact) corrosion is a concern due to the use of different materials. In addition, in the case of heat resistance, it is required for durability and safety of a gasket applied to a connection part of a pipe that transports a fluid having a high temperature or a flammable fluid in the pipe.

There are many insulating high-pressure gasket products used in various industrial fields, but there are not many products that completely satisfy both insulation and heat resistance at the same time. However, considering that gaskets used in harsh environments are used with periodic replacement in mind rather than semi-permanent use, it is required to develop products that are durable for a certain period of time in consideration of the replacement cycle while satisfying the usage conditions.

In the conventional insulating gasket, a sealing function was provided by inserting a rubber sealing material into the grooves formed in a ring shape on the upper and lower edge surfaces of the gasket core made of an insulating material, respectively. There was a problem in that perfect sealing was not achieved. In addition, another conventional insulating gasket is to achieve the purpose of sealing and insulation at the same time by inserting a neoprene rubber or fluororesin-based PTFE sealing member into the entire upper and lower surfaces of the insulating material (Epoxy or Phenollic, etc.) In a harsh environment of high temperature and high pressure, sufficient performance was not achieved and durability was low, so there was a limit in achieving satisfactory performance as a sealing member.

In addition, in the case of a piping that transports a high-temperature environment and flammable liquid, the durability of the gasket cannot withstand the conditions of use and deteriorates, resulting in poor airtightness. As a result, when an external fire occurred, the gasket did not maintain sealing properties, so there was a problem in that the fluid in the pipe leaked and caused a secondary explosion.

It is an object of the present invention to provide an insulating high-temperature gasket having multiple sealing layers that have high insulation and heat resistance and maintain durability and stability even under harsh conditions of use.

To this end, the present invention includes a gasket body made of a metal material having a sawtooth pattern on the upper and lower surfaces, a sealing layer formed on the surface of the body to improve insulation and heat resistance, and a wing part that is opened outward from the outer periphery of the body and into which an elastic body is inserted. And, to provide a gasket in which an organic-inorganic thin film coating layer formed on the surface of the body is formed.

According to the present invention, by using an insulating high-temperature gasket having one or more sealing layers, the airtightness of the pipe used for transferring the fluid is increased.

In addition, according to the present invention, durability and heat resistance of the gasket can be maximized, and at the same time, because the gasket is easy to manufacture and process, versatility in high-temperature and high-pressure environments can be significantly improved.

In addition, the present invention can easily perform the operation because the sealing member can be easily attached and detached.

1 is a diagram schematically showing a perspective view of a basic structure of an insulating high-temperature gasket according to the present invention.
2 is a view schematically showing a cross-section of the basic structure of the insulating high-temperature gasket according to the present invention.
3 is a view schematically showing that an elastic body is provided between the outer ring and the main body in the insulating high-temperature gasket according to the present invention.
4 is a view schematically showing that two elastic bodies are provided between the outer ring and the main body in the insulating high-temperature gasket according to the present invention.
5 is a view schematically showing that a stopper is additionally provided between the elastic body in the insulating high-temperature gasket of FIG. 4 .
6 is a view schematically illustrating a case in which a sealing member is additionally inserted into the inner circumferential surface of the main body in the structure of FIG. 3 in the insulating high-temperature gasket according to the present invention.
7 is a view schematically illustrating a case in which an elastic body is inserted into the sealing member in the structure of FIG. 5 in the insulating high-temperature gasket according to the present invention.
8 is a view schematically showing that in the insulating high-temperature gasket according to the present invention, an inner circumferential sealing portion is provided on the inner circumferential surface of the main body, and an elastic body and a stopper are inserted therein.
9 is a view schematically showing that two elastic bodies and a stopper are inserted into the inner circumferential sealing part of the main body in the insulating high-temperature gasket according to FIG. 8 .
10 is a view showing a first section, a second section, and a third section according to the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them. However, the present invention may be implemented in several different forms and is not limited to the embodiments disclosed below. In addition, in order to clearly disclose the present invention in the drawings, parts irrelevant to the present invention are omitted, and the same or similar symbols in the drawings indicate the same or similar components.

Objects and effects of the present invention can be naturally understood or made clearer by the following description, and the objects and effects of the present invention are not limited only by the following description.

The objects, features and advantages of the present invention will become more apparent from the following detailed description. In addition, in describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

From now on, a gasket according to the present invention will be described.

1 is a perspective view showing an embodiment of an insulating high-temperature gasket having one or more sealing layers according to the present invention, and FIG. 2 shows a cross-section of the insulating high-temperature gasket as one embodiment of the present invention.

As shown in FIG. 2 , the insulating high-temperature gasket 10 having one or more sealing layers according to the present invention includes a body 100 having a circular ring shape, and a thin film on the surface of the body 110 . Formed between the organic-inorganic thin film coating layer 110 to be coated and the sealing layer 200 provided on the upper and lower surfaces of the main body 100 to perform an insulating function, and the sealing layer 200 and the organic-inorganic thin film coating layer 110 . It is composed of an organic layer 230 and the like.

The organic-inorganic thin film coating layer 110 may be a ceramic coating layer, and may be selected from one or more ceramic materials selected from alumina, silica, zircon, zirconium, chromium and nitric oxide, magnesium oxide, and aluminum oxide. In addition, the organic/inorganic thin film coating layer 110 may be selected from polyimide, polyketone, and liquid crystal polymer (LCP) as an organic polymer layer. Through the organic-inorganic thin film coating layer 110 as described above, the insulation of the gasket can be further improved.

The main body 100, as shown, has a circular ring shape in which the central hole 11 is formed to penetrate vertically, and is made of a flat plate having a predetermined thickness. In addition, the main body 100 is made of a metal material with strong heat resistance and corrosion resistance, and is preferably a so-called “kammprofile” disk gasket in which a toothed wheel-shaped irregularity or curve is formed on the surface of the metal material. , but not limited thereto. In addition, pattern portions 101 are provided on the upper and lower surfaces of the body 100 . In detail, the portion in direct contact with the flange portion of the pipe may further include a pattern portion 101 to have a wavy cross-section. Through this, it is possible to increase the fastening force with respect to other components that may be disposed in the vertical direction of the main body 100 . In addition, the inner peripheral portion of the body 100 may be further provided with a bent portion 170 formed so that the sealing member 500 can be additionally installed. By providing the bent portion 170 , it is possible to increase the fastening force with respect to the sealing member 500 that may be positioned on the bent portion 170 . In addition, the present invention can perform a buffering action for a configuration that can be located on the main body 100 when an external force is applied toward the gasket, compared to the case where the bent portion 170 is not provided, so that the sealing member ( 500) can be minimized.

The sealing layer 200 is composed of a single or a plurality of layers and is formed on the upper and lower surfaces of the main body 100 to protect the inner main body 100 due to its high heat resistance, insulation and corrosion resistance, and serves as an insulating function. . As an embodiment of the present invention, in one or more sealing layers 200 , when the sealing layer attached to the surface of the body 100 is composed of n layers as one layer, the thickness (D) of each sealing layer is It provides an insulating high-temperature gasket, characterized in that it satisfies the condition of Dn < Dn+1. As described above, if the one or more sealing layers 200 have a structure that becomes thicker toward the outer surface of the gasket while having different materials, it is advantageous to improve sealing performance or insulation performance.

As another embodiment of the present invention, when the one or more sealing layers 200 are composed of n layers with the sealing layer attached to the surface of the main body 100 as one layer, each sealing layer is Provided is an insulating high-temperature gasket, characterized in that the relative magnitude of the dielectric strength (DS) satisfies the condition of (DS)n > (DS)n+1. That is, it is advantageous to maximize the insulation durability of the gasket when the insulation durability (DS) of the lower layer in contact with the body is greater than the insulation durability (DS) of the upper layer in the relative magnitude of the insulation durability in the plurality of sealing layers.

The organic/inorganic thin film coating layer 110 may be made of an epoxysilyl phosphate ester resin into which melamine is introduced. In more detail, the organic-inorganic thin film coating layer 110 contains 0 to 25 parts by weight of an extender pigment, 4 to 30 parts by weight of an inorganic pigment, and aluminum hydroxide or ammonium polyphosphate based on 20 to 50 parts by weight of the epoxysilyl phosphate ester resin. to 45 parts by weight, 0 to 14 parts by weight of a solvent, and an amine-based curing agent may be included. In addition, one surface of the organic-inorganic thin film coating layer 110 may be formed as a thin film having a thickness of 100 to 1,000 μm on the upper and lower surfaces of the main body 100 . The organic-inorganic thin film coating layer 110 is also formed to have a circular ring shape having a predetermined thickness, and is formed by coating the upper and lower surfaces of the body 100 with a thin film, respectively.

The sealing layer 200 is provided on the upper surface direction and the lower surface direction of the gasket body 100 as shown, and is formed on the upper surface of the organic/inorganic thin film coating layer 110 , respectively. The sealing layer 200 is made of graphite or mica, and as a more preferred embodiment, one or more selected from vermiculite, mica, biotite, pegmatite and synthetic mica may be used. can In addition, the sealing layer 200 may be formed as a thin film having a thickness of 100 to 1,000 μm.

As another embodiment of the present invention, the sealing layer 200 is the first section 201, the second section 202, and the third section 203 from the inner direction to the outer direction of the main body 100. ) can be delimited. In detail, in the sealing layer 200, the first section 201, the second section 202, and the third section 203 may be sequentially provided from the inside to the outside (see FIG. 10). ). The first section 201 , the second section 202 , and the third section 203 may be made of the same graphite or mica material, respectively, or may have graphite or mica material, or different materials corresponding thereto.

As another embodiment of the present invention, the second section 202 may be made of graphite, and the first section 201 and the third section 203 may be made of mica. Through the sealing layer 200 as described above, since the portion in direct contact with the gasket of the pipe has greater heat resistance and strength, it is possible to prevent damage to the body 100 in advance even in high temperature and high pressure environments, thereby maximizing versatility. can do. In particular, a second section portion 202 made of graphite material capable of securely maintaining airtightness is provided, and a first section section 201 made of mica material in the outer and inner directions of the second section section 202 is provided. And by being provided with the third section 203, it has the effect of easily maintaining airtightness while supplementing the insulation of the gasket. That is, as the sealing layer 200 as described above is located on the portion where the pattern portion 101 is formed among the surface of the gasket, the insulation and heat resistance of the gasket required in the portion in direct contact with the flange of the pipe is maximized, and durability can be significantly improved. have. The present invention, including the organic-inorganic thin film coating layer 110 and the sealing layer 200 as described above, is easy to manufacture and process because it has high chemical resistance, insulation and moldability without being easily altered or damaged by an external force, After manufacturing and processing, damage such as thermal deformation can be minimized.

As another embodiment of the present invention, an organic layer 230 may be further provided between the organic/inorganic thin film coating layer 110 and the sealing layer 200 . In detail, between the first section 201 , the second section 202 , and the third section 203 and the organic-inorganic thin film coating layer 110 , an organic material assisting to facilitate processing and handling of the gasket A layer 230 may be further provided. That is, the organic layer 230 is a configuration provided to further increase the flexibility, adhesion, chemical resistance, insulation and moldability of the body 100 and the sealing layer 200, and is a component of cyclohexane, propane, butane and dimethyl. It is preferable that a material containing or corresponding to DME is used.

As another embodiment of the present invention, the organic layer 230 may be disposed between the sealing layer 200 and the organic/inorganic thin film coating layer 110 of FIG. 10 , and the material of the organic layer 230 is mentioned first. One organic layer 230 may be formed of the same material.

The main body 100 of the gasket is formed with a 'C'-shaped outer wing part 150 having one side opened in the outer circumferential direction of the gasket, and the first elastic body 300 is accommodated in the wing part 150 . . The first elastic body 300 is accommodated inside the outer wing portion 150 and functions to apply elasticity so that both ends of the wing portion 150 move away from each other. The material of the first elastic body 300 may be a metal material or a polymer having chemical resistance, for example, a fluororesin including Teflon, rubber including silicon, and a metal spring including stainless steel. The first elastic body 300 serves to increase the sealing performance of the gasket by absorbing vibration caused by various factors, such as movement of a fluid, when the gasket is mounted on the flange and used while improving the restoring force. This first elastic body 300 strengthens the elastic force on the outer ring wing 150, and at the same time strengthens the bonding force between the outer ring 400 and the gasket body 100, the sealing layer 200 is better with the outer ring. function to bind. As described above, the outer ring wing 150 including the first elastic body 300 therein forms a mechanical structure that can be combined with the outer ring 400, and the ring-shaped outer ring 400 is a gasket body ( 100) is responsible for the sealing function of the outer periphery. The material of the outer ring 400 may be one selected from carbon steel, stainless steel, and Inconel alloy.

As a more preferred embodiment, the diameter of the first elastic body 300 may be provided to be 1.05 to 1.50 times the thickness of the outer ring 400 . As described above, since the diameter of the first elastic body 300 is greater than the thickness of the outer ring 400 , the function of the first elastic body 300 can be more effectively performed. That is, when a compressive force compressing the gasket acts, excessive compressive force is applied to the outer ring 400 due to the elastic resistance of the first elastic body 300 and damage can be prevented. On the other hand, when the diameter of the first elastic body 300 is less than 1.05 of the thickness of the outer ring 400, it is difficult to exhibit a sufficient function of the elastic body, and when the diameter of the elastic body exceeds 1.50 of the thickness of the outer ring 400, the elastic body is too large It is undesirable because it puts a burden on the overall gasket structure and may decrease sealing performance.

As another more preferred embodiment, the second elastic body 320 may be further provided in the outer direction of the first elastic body 300 . In detail, the second elastic body 320 is provided to more effectively prevent damage to the first elastic body 300 and the outer ring 400 while inducing a more robust sealing. To this end, the second elastic body 320 is located inside the wing part 150 or the inner circumferential sealing part 160 , but is disposed between the first elastic body 300 and the outer ring 400 . The second elastic body 320 as described above may be equally applied to the embodiment according to FIG. 9 .

The outer ring 400 may be made of the same material as the gasket body 100 . Alternatively, the outer ring may be used in a structure in which an inconel alloy having good high temperature elasticity is double-folded, and the surface may be coated with xylene for insulation. The outer ring 400 of such a material and structure exhibits excellent flame resistance and excellent airtightness at the same time.

Inconel alloy is a heat-resistant alloy containing nickel as a main component and adding 15% chromium, 6-7% iron, 2.5% titanium, 1% or less aluminum, manganese, and silicon. Such an Inconel alloy has good heat resistance, does not oxidize even in an oxidizing air stream of 900° C. or higher, and does not immerse in an atmosphere containing sulfur. In addition, various properties such as elongation strength, tensile strength, and yield point are excellent in mechanical properties such as not changing up to 600°C, and excellent in chemical resistance properties that do not corrode organic substances and salt solutions.

As described above, the outer ring 400 has a circular ring shape and is in close contact with the outer periphery of the gasket body 100 to serve as a secondary sealing of the gasket. In addition, the outer ring 400 prevents the gasket from deviating from its original position due to pressure by contacting the outer surface of the outer ring with the inner surface of the flange bolt. As a more preferred embodiment, the outer ring 400 may be formed to have a thickness of 0.5 to 1.0 times the minimum thickness of the body, which maintains the original airtightness of the gasket by the outer ring 400 provided with an excessively large thickness. It may have the effect of suppressing the phenomenon in which the function is not performed. As described above, since the gasket body 100 and the outer ring 400 are closely coupled to each other using the first elastic body 300 as a medium, it is possible to fully realize the gas tightness of the gasket as a whole.

FIG. 3 shows an insulating high-temperature gasket according to an embodiment of the present invention, and FIG. 4 shows an insulating high-temperature gasket according to an embodiment of the present invention. It shows a case where the elastic body 300 is installed. When one or more elastic bodies are installed, the sealing function can be further improved, and the compressive force acting between the outer ring 400 and the main body 100 can be more efficiently absorbed to improve the restoring force. When there is more than one first elastic body 300 , the size of the elastic body may be the same, or different diameters may be disposed. However, when one or more first elastic bodies 300 are disposed, the length in the outer circumferential direction of the outer wing part 150 may be designed to be longer than that of one.

5 is a view showing an insulating high-temperature gasket according to an embodiment of the present invention. In the gasket structure shown in FIG. 4, a stopper serving as an impact mitigating means between the first elastic body 300 and the second elastic body 320 is shown in FIG. , 310) is added. When the first elastic body 300 and the second elastic body 320 are brought into direct contact within the outer wing portion 150, point contact is made, and there is a possibility that the absorption performance for the compressive force decreases, and the elastic body is deformed under local pressure. There is also a possibility that the shock-absorbing ability may be lowered. In this case, by arranging the stopper 310, which is a shock mitigating means, between the elastic bodies, surface contact is made between the first elastic body 300 and the second elastic body 320 to improve the shock absorption efficiency, and the first elastic body 300 ) and the function of the second elastic body 320 can be further strengthened. In addition, the stopper 310 may prevent damage to the first elastic body 300 and the second elastic body 320 and may also have an effect of preventing excessive compression. In addition, the stopper 310 as described above may be equally applied to the embodiments according to FIGS. 8 and 8 .

6 illustrates a case in which the sealing member 500 is installed on the inner periphery of the main body 100 in the basic structure of FIG. 3 . Such a sealing member may be a metal tube O-ring or a spring. The material of the metal tube O-ring can be stainless steel, an Inconel alloy material, or a metal material coated with fluororesin. can also be used

7 schematically illustrates the installation of the second elastic body 320 inside the sealing member 500 installed on the inner periphery of the main body 100 in the insulating high-temperature gasket structure of FIG. 6 . When the second elastic body 320 is installed inside the sealing member 500, the elastic force of the sealing member 500 is further strengthened to effectively absorb the compressive force acting on the sealing member 500, and It has the advantage of increasing durability. The material of the second elastic body 320 may be the same as that of the first elastic body 300 .

In Figure 8, contrary to the case of Figure 3, a C-shaped opening is provided on the inner circumferential surface of the body 100 to form the inner circumferential sealing portion 160, and the first elastic body 300 and the stopper 310 are installed therein. It schematically shows one thing. In this case, the outer ring 400 may be mechanically coupled to the body 100 or coupled by thermal fusion. When the inner circumferential sealing part 160 is formed in this way, there is an advantage in that the sealing function of the gasket can be strengthened from the inner circumferential surface in contact with the fluid. However, since the stopper 310 or the first elastic body 300 mounted on the inner circumferential sealing part 160 is in direct contact with the fluid, the material of the stopper 310 and the first elastic body 300 depends on the properties and usage conditions of the fluid. should be appropriately selected. In general, as a material of the stopper 310, a metal material including stainless steel or a fluororesin including PTFE may be used.

9 shows the first elastic body 300 and the second elastic body 320 on the inner circumferential sealing part 160 in the insulating high-temperature gasket shown in FIG. The structure for preventing excessive deformation of the first elastic body 300 and the second elastic body 320 to enhance durability is schematically illustrated. Materials of the first elastic body 300 , the second elastic body 320 , and the stopper 310 may be the same as those of the other embodiments described above.

The above-described preferred embodiments of the present invention are disclosed for the purpose of illustration, and those skilled in the art with ordinary knowledge for the present invention will be able to make various modifications, changes and additions within the spirit and scope of the present invention, such modifications, changes and additions should be considered to be within the scope of the above claims.

Those of ordinary skill in the art to which the present invention pertains, within the scope of not departing from the technical spirit of the present invention, various substitutions, modifications and changes are possible, so the present invention is described in the above-described embodiments and the accompanying drawings. not limited by

Claims (16)

A gasket body 100 made of a metal material having a sawtooth-shaped pattern portion 101 on the upper and lower surfaces;
a sealing layer 200 formed on the surface of the body 100 to improve insulation and heat resistance; and
and a wing portion 150 that is opened outwardly from the outer periphery of the main body 100 and into which the first elastic body 300 is inserted.
An organic-inorganic thin film coating layer 110 formed on the surface of the body 100; is formed,
The sealing layer 200 is made of graphite or mica,
The insulating high-temperature gasket further comprising an organic layer (230) positioned between the organic-inorganic thin film coating layer (110) and the sealing layer (200).
A gasket body 100 made of a metal material having a sawtooth-shaped pattern portion 101 on the upper and lower surfaces;
a sealing layer 200 formed on the surface of the body 100 to improve insulation and heat resistance; and
and an inner circumferential sealing part 160 that is opened inward from the inner periphery of the main body 100 and reinforced the sealing performance of the main body 100 by inserting the first elastic body 300,
An organic-inorganic thin film coating layer 110 formed on the surface of the body 100; is formed,
The sealing layer 200 is made of graphite or mica,
The insulating high-temperature gasket further comprising an organic layer (230) positioned between the organic-inorganic thin film coating layer (110) and the sealing layer (200).
The method of claim 1,
Insulation high-temperature gasket, characterized in that it further comprises a bent portion (170) formed so that the sealing member (500) can be additionally installed on the inner periphery of the main body (100).
3. The method according to claim 1 or 2,
Insulation high-temperature gasket, characterized in that the outer ring 400 is further provided in the outer direction of the main body (100).
5. The method of claim 4,
The thickness of the outer ring (400) is 0.5 to 1.0 times the minimum thickness of the main body (100) insulation high-temperature gasket, characterized in that.
5. The method of claim 4,
The first elastic body (300) has a diameter of 1.05 to 1.50 times the thickness of the outer ring (400).
5. The method of claim 4,
Insulation high-temperature gasket, characterized in that it further comprises a second elastic body (320) positioned between the first elastic body (300) and the outer ring (400).
8. The method of claim 7,
The insulating high-temperature gasket further comprising a stopper (310) provided between the first elastic body (300) and the second elastic body (320).
3. The method according to claim 1 or 2,
The organic-inorganic thin film coating layer 110 is an insulating high-temperature gasket, characterized in that the melamine-introduced epoxy silyl phosphate ester resin.
10. The method of claim 9,
The organic-inorganic thin film coating layer 110 is a flame retardant comprising 0 to 25 parts by weight of an extender pigment, 4 to 30 parts by weight of an inorganic pigment, and aluminum hydroxide or ammonium polyphosphate based on 20 to 50 parts by weight of the epoxysilyl phosphate ester resin. An insulating high-temperature gasket comprising parts by weight, 0 to 14 parts by weight of a solvent, and an amine-based curing agent.
delete 3. The method according to claim 1 or 2,
The sealing layer 200 is divided into a first section 201, a second section 202, and a third section 203 from the inside to the outside,
The sealing layer 200 is an insulating high-temperature gasket, characterized in that provided with graphite or mica material.
13. The method of claim 12,
The second section 202 is made of a graphite material,
The first section 201 and the third section 203 are made of mica material.
delete 3. The method according to claim 1 or 2,
The organic layer 230 includes at least one selected from polyimide, fluororesin including PTFE, liquid crystal polymer (LCP), epoxy, and polyketone.
3. The method according to claim 1 or 2,
The organic layer 230 is an insulating high-temperature gasket comprising cyclohexane, propane, butane and dimethyl ether (DME).

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