CN111750104A - Embedded flexible graphite gasket - Google Patents
Embedded flexible graphite gasket Download PDFInfo
- Publication number
- CN111750104A CN111750104A CN201910251548.6A CN201910251548A CN111750104A CN 111750104 A CN111750104 A CN 111750104A CN 201910251548 A CN201910251548 A CN 201910251548A CN 111750104 A CN111750104 A CN 111750104A
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- China
- Prior art keywords
- flexible graphite
- gasket
- metal ring
- embedded
- annular groove
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention belongs to the technical field of sealing, and particularly relates to an embedded flexible graphite gasket which is formed by combining a metal ring and flexible graphite, wherein the flexible graphite is a graphite cylinder with a groove in the middle, the upper side and the lower side of the inner ring of the metal ring are respectively provided with an up-down symmetrical annular groove, the metal ring is embedded in the groove in the middle of the flexible graphite and fixed with the flexible graphite through the annular grooves, and the flexible graphite and the metal ring are pressed into an integral gasket. Because the flexible graphite is positioned between the inner ring and the outer ring and is pressed into a whole, the gasket cannot be lost due to the washing of a fluid medium even if the gasket is installed in an incompletely closed space, and the sealing performance can be kept for a long time.
Description
Technical Field
The invention belongs to the technical field of sealing, and particularly relates to an embedded flexible graphite gasket.
Background
The common flexible graphite gasket structure is shown in figure 1, is formed by pressing pure flexible graphite and has good sealing performance.
The flexible graphite gasket is punched or cut from a pure graphite plate, has good corrosion resistance, high/low temperature resistance, good compression resilience and high strength, and various circular complex geometric gaskets are widely used for pipelines, valves, pumps, pressure vessels, heat exchangers, condensers, generators, air compressors, exhaust pipes, refrigerators and the like.
The flexible graphite is also called expanded graphite, which takes scale graphite as raw material and generates an interlaminar compound through chemical treatment.
At the high temperature of 800-. Loose and porous, and has elasticity. Working under high temperature, high pressure or radiation condition, no decomposition, deformation or aging, and stable chemical property.
The birth of the flexible graphite declares that the development of the ancient board in the chemical sealing field will be finished. Compared with asbestos gaskets, flexible graphite has the following obvious advantages:
no radiation and no pollution.
The flexible graphite contains no harmful components to human body, while the asbestos product has the harm of radiating human body and can pollute environment.
Secondly, the high temperature resistance.
The flexible graphite reinforced composite gasket can resist the high temperature of 1650 ℃, and even if chemical equipment is melted, the gasket is still safe and innocent.
The crystal water inside the asbestos product is decomposed at 500 ℃, so that the asbestos product is pulverized and loses efficacy.
Thirdly, the application range is wide.
Besides strong oxidizing acid, the flexible graphite can resist most chemical media, including radioactive chemical media, while the asbestos product has poor adaptability and cannot be used for the radioactive media.
Some chemical towers, heat exchangers and the like require that the connecting parts are not heat-insulated, flexible graphite can be used, and stone plate products cannot be used.
Fourthly, the use is simple, convenient and quick.
The gasket coefficient of the flexible graphite is only half of that of the asbestos product, that is, the tightening force of the screw can be much smaller to achieve the same sealing effect.
The flexible graphite has the obvious characteristics, and also has the characteristics of excellent sealing performance, compressibility, good elasticity and oxidation resistance, and has extremely strong self-lubricating property and plasticity.
Meanwhile, the composite material has the characteristics of good conductivity, high specific gravity, high density and the like, and can be used for manufacturing various pipelines, flange gaskets and the like for adjusting diesel engines, compressors and the like.
The disadvantages of the above structure: a flexible graphite gasket needs to be installed in a closed space to obtain a good sealing effect.
If not installed in a closed space, the flexible graphite will be lost under the scouring of the fluid medium and gradually lose the sealing performance.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a flexible graphite gasket structure, which can be arranged in an incompletely closed space, cannot be lost due to the flushing of a fluid medium and can keep the sealing performance for a long time.
The technical scheme of the invention is as follows:
the utility model provides an embedded flexible graphite gasket, is formed by the combination of becket and flexible graphite, and flexible graphite presses into whole graphite cylinder as middle notched groove, and the upper and lower both sides in the middle of the metal annular district all process a vertically symmetrical ring channel, and the becket nestification is in the middle recess of flexible graphite to realize the fixed of becket and flexible graphite through the ring channel, flexible graphite becomes an integral gasket through the suppression with the becket.
The width B of the annular groove is the width of the sealing surface of the flexible graphite, and the depth h0 of the annular groove is 1mm-1.5 mm.
An embedded flexible graphite gasket, the depth h0 of the annular groove is 1.25 mm.
An embedded flexible graphite gasket, a plurality of round holes are arranged in the middle of an annular groove, the number of the round holes is not less than 4,
an embedded flexible graphite gasket having a circular hole diameter a of about 1/2 a of the annular groove width B.
The thickness H of the metal ring of the embedded flexible graphite gasket is 70-80% of the thickness H of the flexible graphite.
An embedded flexible graphite gasket, the thickness h of the metal ring is 75% of the thickness of the flexible graphite.
The invention has the beneficial effects that:
because the flexible graphite is positioned in the groove of the metal ring and is pressed into a whole, the gasket cannot be lost due to the washing of a fluid medium even if the gasket is installed in an incompletely closed space, and the sealing performance can be kept for a long time.
Drawings
Fig. 1 shows a conventional flexible graphite gasket structure.
Fig. 2 is a view of the structure of the embedded flexible graphite gasket of the present invention.
In the figure: 1. flexible graphite; 2. a metal ring.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in the attached drawing, the embedded flexible graphite gasket is formed by combining a metal ring 2 and flexible graphite 1, and the flexible graphite 1 is pressed into a graphite cylinder with a groove in the middle.
The upper side and the lower side of the annular area of the metal ring 2 are both provided with an annular groove which is symmetrical up and down, the metal ring is embedded in the groove in the middle of the flexible graphite, and the metal ring and the flexible graphite are fixed through the annular groove.
The width B of the annular groove is the width of the sealing surface of the flexible graphite 1, and the depth h0 of the annular groove is 1mm-1.5 mm.
The middle of the annular groove is provided with a plurality of round holes, the number of the round holes is not less than 4, the diameter A of the round holes is about 1/2 of the width B of the annular groove, the thickness H of the metal ring 2 is 70% -80% of the thickness H of the flexible graphite 1 so as to control the appropriate compression amount of the flexible graphite 1, and the flexible graphite 1 and the metal ring 2 are pressed into an integral gasket.
An embedded flexible graphite gasket is formed by combining a metal ring 2 and flexible graphite 1, and the flexible graphite 1 is pressed into a graphite cylinder with a groove in the middle.
The upper side and the lower side of the annular area of the metal ring 2 are both provided with an annular groove which is symmetrical up and down, the metal ring is embedded in the groove in the middle of the flexible graphite, and the metal ring and the flexible graphite are fixed through the annular groove.
The width B of the annular groove is the width of the sealing surface of the flexible graphite 1, and the depth h0 of the annular groove is 1.25 mm.
The middle of the annular groove is provided with a plurality of round holes, the number of the round holes is not less than 4, the diameter A of the round holes is about 1/2 of the width B of the annular groove, the thickness H of the metal ring 2 is 70% -80% of the thickness H of the flexible graphite 1 so as to control the appropriate compression amount of the flexible graphite 1, and the flexible graphite 1 and the metal ring 2 are pressed into an integral gasket.
The thickness h of the metal ring is 75% of the thickness of the flexible graphite.
The technical characteristics for realizing the invention are as follows:
because the flexible graphite is pressed in the metal ring, and because of the relationship of the annular groove of the metal ring and the round hole thereof, the flexible graphite can not be separated from the metal ring, thereby forming an integral gasket with the metal ring.
Therefore, even if the sealing device is installed in an incompletely closed space, the sealing device can not be lost due to the flushing of the fluid medium, and the sealing performance can be kept for a long time.
Claims (7)
1. The utility model provides an embedded flexible graphite gasket, is formed by the metal ring and the combination of flexible graphite which characterized in that: the flexible graphite is pressed into a graphite cylinder with a groove in the middle, the upper side and the lower side in the middle of the metal annular area are both provided with an up-down symmetrical annular groove, the metal ring is embedded in the groove in the middle of the flexible graphite and fixed with the flexible graphite through the annular groove, and the flexible graphite and the metal ring are pressed into an integral gasket.
2. An embedded flexible graphite gasket as recited in claim 1, wherein: the width B of the annular groove is the width of the sealing surface of the flexible graphite, and the depth h0 of the annular groove is 1mm-1.5 mm.
3. An embedded flexible graphite gasket as recited in claim 2, wherein: the depth h0 of the annular groove is 1.25 mm.
4. An embedded flexible graphite gasket as recited in claim 1, wherein: the middle of the annular groove is provided with a plurality of round holes, and the number of the round holes is not less than 4.
5. An embedded flexible graphite gasket as recited in claim 4, wherein: the circular hole diameter a is about 1/2 of the annular groove width B.
6. An embedded flexible graphite gasket as recited in claim 1, wherein: the thickness H of the metal ring is 70-80% of the thickness H of the flexible graphite.
7. An embedded flexible graphite gasket as recited in claim 6, wherein: the thickness h of the metal ring is 75% of the thickness of the flexible graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910251548.6A CN111750104A (en) | 2019-03-29 | 2019-03-29 | Embedded flexible graphite gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910251548.6A CN111750104A (en) | 2019-03-29 | 2019-03-29 | Embedded flexible graphite gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111750104A true CN111750104A (en) | 2020-10-09 |
Family
ID=72671649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910251548.6A Pending CN111750104A (en) | 2019-03-29 | 2019-03-29 | Embedded flexible graphite gasket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111750104A (en) |
-
2019
- 2019-03-29 CN CN201910251548.6A patent/CN111750104A/en active Pending
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