KR20170111794A - Safe insulation gasket in adverse conditions of flame or electric - Google Patents

Abstract

It is an object of the present invention to provide an insulated gasket which is safe even in a flame or electric environment and is provided with a through hole so that the fluid passes through the center of the insulated gasket and has a circular shape having concentric inner and outer grooves along the circumference spaced outwardly from the through hole A disc main body; An inner sealing portion coupled to the inner groove; And an outer sealing part having an outer tube coupled to the outer groove and an outer coil spring inserted along the longitudinal direction inside the outer tube to apply a predetermined elastic force to the entire outer tube, The outer coil spring is inserted and the outer tube is annularly shaped and both ends of the outer tube are welded to each other to form an O-ring shape. Whereby the inner sealing portion and the outer sealing portion can be easily engaged in the inner groove and the outer groove of the disc body.

Description

[0001] The present invention relates to a safety gasket for a flame or an electrical environment,

The present invention relates to an insulating gasket which is safe even in a flame or electric environment, and more particularly, to an insulating gasket which can securely insulate even the bad conditions of flame or electricity which can easily join an inner sealing portion and an outer sealing portion in an inner groove and an outer groove of a disk body. Gaskets.

Generally, a gasket is inserted between two pipes which are mainly stopped, and it is a part for blocking the leakage of fluid to a gap between the pipes. It is a part between two defective parts where a fluid such as a valve or a pipe is transferred And has a sealing function for preventing leakage of fluid and for preventing foreign matter from entering from the outside. Such a gasket has a flange for connecting a valve, a pipe, or the like, and functions to block the flange from the outside while being compressed by the compression force applied in the axial direction by being assembled between the flanges. At this time, the gasket comes into contact with a fluid such as a valve or a pipe and comes into contact with outside air, and is accompanied by thermal deformation due to thermal contraction or thermal expansion due to a considerable temperature difference between the temperature of the fluid and the outside air. Further, various deformations and damages are caused in the gasket due to the high temperature, high pressure of the fluid, and over-tightening pressure of the flange or the like in the valve or pipe, and the sealing property is lowered.

Such a gasket is used between a connection portion of a fluid pipe functioning as a fluid passage, such as the prior art 'US Patent No. 8,678,398 ISOLATION GASKET, SYSTEM AND METHOD OF MANUFACTURE' A dielectric material layer disposed on at least one surface of said opposite surfaces and an inner and outer grooves formed on at least one surface of said opposite surfaces, A second seal member disposed within the outer groove and a compression limiter, the first seal member being formed to extend through the dielectric material layer and into the metal plate, the first seal member completely surrounding the opening, The fluid piping is used between the connecting parts. Such a structure is a state in which the secondary seal member is exposed to the outside, so that there is a high risk that the secondary seal member is damaged by external impact.

In the case of a gasket for high-temperature and high-pressure insulated gasket equipped with a sealing sheet and an insulating gasket for a high-temperature and high-pressure gasket fitted with a metal O-ring, a planar annular metal plate And an insulating support plate of a GRE material, which is an inorganic or organic composite material attached to both side surfaces of the planar annular metal plate. The planar illusory metal plate to which the insulating material plate is attached has inner side grooves and outer side grooves formed on both sides, And a secondary sealing member disposed in the outer groove, wherein the primary sealing member has a structure in which a reinforcing spring is mounted in a shell of a PTFE material. In this structure, since the reinforcing springs mounted inside the primary sealing member are arranged in the vertical direction, a plurality of reinforcing springs must be mounted in order to arrange the reinforcing springs along the inner grooves. As described above, when a plurality of reinforcing springs are mounted, a plurality of shells must be used, and the process of mounting the reinforcing springs is complicated.

United States Patent and Trademark Office Patent US 8,678,398 Korea Patent Office Registration No. 10-1560189 Korea Patent Office Registration No. 10-1560190

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a safety insulating gasket which can easily join an inner sealing portion and an outer sealing portion in an inner groove and an outer groove of a disk body, even in a flame or electricity.

The above-described object is achieved by a disk apparatus comprising: a circular disk body having a through-hole formed therethrough so as to allow a fluid to pass through the center thereof and having an inner groove and an outer groove concentrically formed along a periphery spaced from the through- An inner sealing portion coupled to the inner groove; And an outer sealing part having an outer tube coupled to the outer groove and an outer coil spring inserted along the longitudinal direction inside the outer tube to apply a predetermined elastic force to the entire outer tube, The gasket for high temperature and high pressure is characterized in that the outer coil spring is inserted, the outer tube is annularly formed, and the both ends of the outer tube are welded to each other to form an O-ring.

Here, the outer tube is formed of a metal material, and an outer layer and a corrosion prevention layer are coated on the outer surface of the metal material. The inner sealing portion includes a 'C' shaped inner tube coupled to the inner groove, And an inner coil spring connected to the groove of the inner tube and elastically supported in an O-ring shape.

In addition, the inner and outer grooves of the inner and outer grooves gradually increase in width from the inlet to the bottom, so that the inner and outer sealing portions are fitted to each other. It is preferable that the width of the bottom portion is 1.2 to 1.5 times wider than the width.

According to the above-described structure of the present invention, the inner sealing portion and the outer sealing portion can be easily engaged in the inner groove and the outer groove of the disc body.

1 is a front view of an insulating gasket according to an embodiment of the present invention,
Fig. 2 is a detailed sectional view of Fig. 1,
3 is a side cross-sectional view of the gasket,
Figs. 4 and 5 are cross-sectional views showing an inner sealing portion and an outer sealing portion which are engaged with the inner groove and the outer groove, respectively,
6 is a state diagram showing a state in which the outer coil spring is coupled to the outer tube.

Hereinafter, an insulating gasket according to the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the insulating gasket 10 includes a disc main body 100, an inner sealing portion 300 and an outer sealing portion 500 coupled to the disc main body 100.

The disc main body 100 is formed in a circular shape and a through hole 110 is formed in the central region of the disc main body 100 so that the fluid passes through the center. In the case of the high-temperature and high-pressure gasket 10, since the gasket 10 is inserted between the two pipes and blocks the leakage of the fluid to the gap between the pipes, the fluid passing through the two pipes must pass through the gasket 10 do. Therefore, a through hole 110 is formed in the disc main body 100.

In addition, concentric inner and outer grooves 130 and 150 are formed in the disc main body 100 along the circumference spaced from the through hole 110 in the outward direction. That is, the inner grooves 130 and the outer grooves 150 have the same center, and the inner grooves 130 are formed at positions close to the center and the outer grooves 150 are formed at positions far from the center. The inner grooves 130 and the outer grooves 150 may be formed on one side of the disc main body 100 but are formed on both sides of the disc main body 100 in order to facilitate fluid sealing.

The disk body 100 is preferably made of a metal material so as not to deform its shape due to fluid passing through the through hole 110, fire extinguisher externally applied thereto, high pressure, etc. However, it may be made of a plastic material. An insulating support plate 170 of an organic or inorganic composite material may be additionally formed on both sides of the disc main body 100. In the case of the insulating support plate 170, the insulating support plate 170 has high insulation, prevents leakage due to excessive tightening pressure, It is advantageous to further construct the insulating support plate 170 because it acts to prevent interference and deformation by external fluid or influent.

The inner sealing portion 300 coupled to the inner groove 130 includes an inner tube 310 and an inner coil spring 330. Among the inner sealing parts 300, the inner tube 310 is coupled to the inner groove 130 and has a 'C' -shaped section having a groove formed at one side thereof, and an area facing the groove has an oblique trapezoidal section. That is, the inner tube 310 has a shape which is opened at one side along the longitudinal direction, and the inner coil spring 330 can be inserted through the opened region. The inner coil spring 330 is coupled to the groove of the inner tube 310 and is coupled to the inner groove 130 in an O-ring shape, so that the sealing of the gasket 10 is smoothly performed through the elastic support. At this time, the inner tube 310 is provided with grooves in a direction close to the center, so that the O-ring-shaped inner tube 310 supports the inner coil spring 330 from the outside so as to prevent the inner coil spring 330 from escaping.

In this case, when the inner groove 130 is formed in a rectangular cross-section, the inner groove 130 and the inner sealing portion 300 must be coupled using a separate adhesive after inserting the inner sealing portion 300, The manufacturing process is cumbersome. Therefore, in order to solve this problem, in the present invention, the inner groove 130 has the same trapezoidal shape as the inner tube 310. That is, the width of the groove gradually increases from the inlet portion 131 facing the outside of the inner groove 130 towards the bottom portion 133 toward the inside, and the inner sealing portion 300 is formed so as to extend from the inlet of the inner groove 130 So that the inner sealing portion 300 is fitted into the inner groove 130 by pressurization. If the inner groove 130 is formed to be finer than the inner sealing portion 300 and has a rectangular cross-section, it is not easy to fit the inner sealing portion 300 into the inner groove 130. Accordingly, the inlet of the inner groove 130 is formed to be smaller than the inner sealing portion 300, and the bottom portion 133 is gradually increased in width, so that the inner sealing portion 300 is easily fitted. It is preferable that the width of the bottom portion 133 of the inner groove 130 is 1.2 to 1.5 times wider than the width of the inlet portion 131. If the width of the bottom portion 133 is 1.2 times smaller than the width of the inlet portion 131 It is inconvenient for the inner sealing part 300 to be inserted. If it exceeds 1.5 times, the inlet part 131 is not firmly formed, and there is a fear that the inner sealing part 300 is broken while fitting the inner sealing part 300.

The outer sealing part 500 is coupled to the outer groove 150 to protect the inner sealing part 300 from an external fire or shock and includes an outer tube 510 and an outer coil spring 530 . The outer tube 510 is configured to be coupled to the outer groove 150 and has a tubular shape having a circular cross section. Since the outer coil spring 530 inserted into the outer tube 510 is not structured such that the outer tube 510 is opened like the inner tube 310, 500 to impart a certain elastic force to the entire outer tube 510. In order to form the outer sealing part 500, the outer coil spring 530 is inserted into the long outer tube 510, the outer tube 510 and the outer coil spring 530 are bent in an annular shape And both ends of the outer tube 510 are welded together to form an O-ring shape.

The outer tube 510 is made of a metal material to protect the inner sealing part 300 from an external fire or shock and further coated with an insulating layer and an anti-corrosion layer on the outside of the metal material outer tube 510 desirable. Here, the outer tube 510 of the metal material is a material made of stainless steel, iron (Fe), copper (Cu), aluminum (Al), tungsten (W), titanium In the case of the anti-corrosive layer, it is preferable that it is made of xylan coating.

At this time, if the outer groove 150 has the same cross-section as the outer sealing part 500, the outer sealing part 500 is inserted and then the outer groove 150 and the outer sealing part 500 are coupled using a separate adhesive The manufacturing cost is increased and the manufacturing process is troublesome. In particular, when the outer groove 150 has a semi-circular cross-section, it is impossible to insert the outer sealing portion 500 into the outer groove 150 when using an adhesive, Like shape of the inner groove 130. The width of the groove gradually increases from the inlet portion 151 toward the outside toward the interior of the bottom portion 153 toward the outside of the outer groove 150 as in the inner groove 130. The outer sealing portion 500 So that the outer sealing portion 500 is fit into the outer groove 150 by fitting the inner sealing portion 500 into the outer groove 150.

Here, it is preferable that the width of the bottom portion 153 of the outer groove 150 is 1.2 to 1.5 times wider than the width of the inlet portion 151. If the width of the bottom portion 153 is 1.2 times smaller than the width of the inlet portion 151 It is inconvenient for the outer sealing portion 500 to be inserted. If the outer sealing portion 500 is more than 1.5 times, the inlet portion 151 may not be formed firmly and the outer sealing portion 500 may be broken while being inserted. Also, the outer groove 150 is preferably formed such that the height of the outer sealing portion 500 is about 1/4 to 1/3 of the height of the outer groove 150 so as to protrude outwardly and be fit-fitted. This is because when the outer groove 150 is formed so that the height of the outer sealing part 500 protrudes less than 1/4 of the height, the outer sealing part 500 having a circular cross section is not fixed to the outer groove 150, There is a fear that the outer sealing portion 500 may be separated from the outer groove 150 when the height is larger than the 1/3 height portion.

In the conventional gasket, since the reinforcing springs are arranged in the vertical direction, a plurality of reinforcing springs must be mounted in order to arrange the reinforcing springs along the inner grooves. As described above, when a plurality of reinforcing springs are mounted, a plurality of sealing portions must be used, and the process of mounting the reinforcing springs is complicated. Further, since the inner groove and the outer groove are formed to have the same cross-section as the sealing portion, there is a disadvantage in that an adhesive must be separately used in order to bond them together. The inner coil springs 330 and the outer coil springs 530 are disposed along the longitudinal direction to utilize elastic force in the longitudinal direction and the inner grooves 130 and the outer grooves 150 are connected to the inlet 131 151 and the bottoms 133, 153, the width of the grooves gradually increases from the bottoms 133, 153 to the bottoms 133, 153, so that it is possible to perform the fitting engagement without using any additional adhesive.

10: Gasket
100: disk body
110: Through hole
130: Inner groove
131, 151: inlet portion
133, 153:
150: outer groove
170: Insulation support plate
300: Inner sealing part
310: Inner tube
330: Inner coil spring
500: outer sealing part
510: outer tube
530: outer coil spring

Claims (5)

A circular disk body having a through hole formed so that fluid passes through the center and having concentric inner and outer grooves formed along a circumference spaced outwardly from the through hole;
An inner sealing portion coupled to the inner groove;
And an outer sealing part composed of an outer tube coupled to the outer groove and an outer coil spring inserted along the longitudinal direction inside the outer tube to apply a constant elastic force to the entire outer tube,
Wherein the outer coil spring is inserted into the outer tube having a long length and the outer tube is formed into an annular shape, and both ends of the outer tube are welded to each other to form an O-ring. Secure insulation gasket. The method according to claim 1,
Wherein the outer tube comprises:
The insulating gasket is formed of a metal material and is coated with an insulating layer and a corrosion preventing layer on the outside of the metal material. The method according to claim 1,
The inner sealing portion
An inner tube coupled to the inner groove and having a groove formed at one side thereof and an inner coil spring connected to the groove of the inner tube and elastically supported in an O-ring shape. Isolation gasket also safe. The method according to claim 1,
Wherein the inner grooves and the outer grooves have cross-
And the width of the groove gradually increases from the inlet portion to the bottom portion so that the inner sealing portion and the outer sealing portion are engaged with each other. 5. The method of claim 4,
Wherein the inner groove and the outer groove are 1.2 to 1.5 times as wide as the width of the inlet portion.

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