CN102606822A - High-temperature high-pressure elastic sealing gasket - Google Patents
High-temperature high-pressure elastic sealing gasket Download PDFInfo
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- CN102606822A CN102606822A CN2012100774681A CN201210077468A CN102606822A CN 102606822 A CN102606822 A CN 102606822A CN 2012100774681 A CN2012100774681 A CN 2012100774681A CN 201210077468 A CN201210077468 A CN 201210077468A CN 102606822 A CN102606822 A CN 102606822A
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- refractory alloy
- sealing gasket
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Abstract
The invention discloses a high-temperature high-pressure elastic sealing gasket. A traditional method for connecting a high-temperature high-pressure pipeline with a valve usually is welding the valve and the pipeline fixedly, in this way, maintenances of the valve and the pipeline, particularly the valve which is frequently dismantled, are inconvenient, and the pipeline becomes shorter as the pipeline is frequently cut. The high-temperature high-pressure elastic sealing gasket disclosed by the invention is characterized in that: the high-temperature high-pressure elastic sealing gasket comprises an inner ring made of high-temperature steel, an outer ring, and an annular skeleton between the inner ring and the outer ring; the skeleton is composed of a plurality of annular high-temperature alloy plates, of which the sections are -shaped like a crescent; a plurality of high-temperature alloy plates are arranged in a row, and at least one heat-resisting flexible grapheme belt is arranged between the adjacent high-temperature alloy plates. According to the high-temperature high-pressure elastic sealing gasket disclosed by the invention, by utilizing shrinking and resetting functions of the sealing gasket, the tightness between the sealing gasket and a flange is guaranteed in and after the temperature rise process, and the problem caused by temperature rise lag of a bolt is solved.
Description
Technical field
The present invention relates to the Sealing field, specifically a kind of HTHP elastic packing pad.
Background technique
Along with the quickening of China's modernization of industry process, the pipeline of high temperature, superhigh temperature, high pressure is increasing, because the complexity that pipeline valve connects again with the multiple physical phenomenon that heats up and change, connects the high temperature flange and becomes more and more impossible.As adopting conventional gasket seal between the high temperature flange; When pipeline heated up, because flange connects the hysteresis that heats up with bolt, bolt produced tightening force to two side flanges of pad; Pad is compressed and can not get timely expansion; When the temperature of connecting bolt rises to flange temperature unanimity by the time, produced the gap between pad and the flange, thereby made the joint of high temperature, high pressure pipe line be prone to problem loosening, that leak.Existing common way is that dead valve and pipeline weldering, like this, extremely inconvenient to the maintenance of valve, pipeline, the valve that particularly often will dismantle has only frequent pipe cutting road, causes pipeline to cut shorter and shorter.
Summary of the invention
Technical problem to be solved by this invention is to overcome the defective that above-mentioned existing technology exists, and a kind of HTHP elastic packing pad is provided, and contraction and the reset function of utilizing gasket seal self to have are to solve the problem that heats up and lag behind and bring owing to bolt.
For this reason; The present invention adopts following technological scheme: HTHP elastic packing pad; It is characterized in that it comprises interior ring, outer shroud and the cyclic skeleton of being processed by high-temperature steel between inside and outside ring, said skeleton is ">by a plurality of cross sections " the ring-type refractory alloy sheet of shape forms; Described a plurality of refractory alloy sheet is arranged in a row, and is provided with one deck high-temperature-resistant flexible graphite tape at least between the adjacent refractory alloy sheet.
The cross section of refractory alloy sheet is ">" shape, this shape has effectively guaranteed the contraction of refractory alloy sheet and has resetted.When pipeline heated up, because the hysteresis that bolt heats up, bolt was strained two side flanges; The elasticity of gasket seal is carried out deformation-compensated effectively; Be refractory alloy sheet compressive deformation, flexible graphite belt is compressive deformation thereupon also, along with reducing of bolt tightening force; The refractory alloy sheet also recovers to normality gradually, thereby can in temperature-rise period, guarantee the sealing between flange and the pad; By the time bolt is warming up to temperature with flange when consistent, the elongation of bolt heat expansion, and the complete obiteration of bolt tightening force, the refractory alloy sheet in the gasket seal returns to normality again, has guaranteed the sealing between intensification rear flange and the pad.
As preferably, the height of said refractory alloy sheet and the thickness of interior ring are than being 1.2-1.8:1, and this ratio is the most reasonable, and ratio is excessive, and the elasticity of refractory alloy sheet is excessive, has recovered not; Ratio is too small, and the elasticity of refractory alloy sheet is not enough, poor sealing, and the thickness of outer shroud is consistent with interior ring.
As preferably, the thickness of said refractory alloy sheet is 0.6-0.8mm, and the distance between the adjacent high-temperature alloy slice is 1.2-1.4mm.
As preferably, described flexible graphite belt is wrapped in and is positioned on the inboard refractory alloy sheet outer wall, and is easy to process.
As preferably, said in the exterior edge face of ring be welded on and be positioned on the refractory alloy sheet of skeleton in, the interior edge face of outer shroud is welded on the refractory alloy sheet that is positioned at the skeleton outermost.
As preferably, the width of said skeleton is 20-50mm, and this width suitably selects according to the size of gasket seal.
Contraction and reset function that the present invention utilizes gasket seal self to have have guaranteed the sealing between itself and the flange in temperature-rise period and after heating up, solved the problem that hysteresis brings because bolt heats up.
Below in conjunction with Figure of description and embodiment the present invention is described further.
Description of drawings
Fig. 1 is structural representation of the present invention (sectional view of half structure).
Embodiment
HTHP elastic packing pad as shown in Figure 1; Its interior ring 1 of being processed by high-temperature steel (25-20), outer shroud 3 and the cyclic skeleton between inside and outside ring are formed; Said skeleton is ">by a plurality of cross sections " the ring-type refractory alloy sheet 2 (GH600) of shape forms; Described a plurality of refractory alloy sheet is arranged in a row, and the exterior edge face of interior ring is welded on and is positioned on the refractory alloy sheet of skeleton in, and the interior edge face of outer shroud is welded on the refractory alloy sheet that is positioned at the skeleton outermost.Be provided with multilayer high-temperature-resistant flexible graphite tape 4 between the adjacent refractory alloy sheet, described flexible graphite belt is wrapped in and is positioned on the inboard refractory alloy sheet outer wall.The height of refractory alloy sheet is 1.5:1, the thickness of outer shroud and the consistency of thickness of interior ring with the thickness of interior ring ratio.The thickness of said refractory alloy sheet is 0.7mm, and the distance between the adjacent high-temperature alloy slice is 1.3mm.The width of skeleton is 35mm.
Claims (6)
1. HTHP elastic packing pad; It is characterized in that; It comprises interior ring (1), outer shroud (3) and the cyclic skeleton of being processed by high-temperature steel between inside and outside ring; Said skeleton is ">by a plurality of cross sections " the ring-type refractory alloy sheet (2) of shape forms, and described a plurality of refractory alloy sheets are arranged in a row, and are provided with one deck high-temperature-resistant flexible graphite tape (4) at least between the adjacent refractory alloy sheet.
2. HTHP elastic packing pad according to claim 1 is characterized in that, the height of said refractory alloy sheet is 1.2-1.8:1 with the thickness of interior ring ratio, and the thickness of outer shroud is consistent with interior ring.
3. HTHP elastic packing pad according to claim 1 and 2 is characterized in that the thickness of said refractory alloy sheet is 0.6-0.8mm, and the distance between the adjacent high-temperature alloy slice is 1.2-1.4mm.
4. HTHP elastic packing pad according to claim 3 is characterized in that, described flexible graphite belt is wrapped in and is positioned on the inboard refractory alloy sheet outer wall.
5. HTHP elastic packing pad according to claim 4 is characterized in that, said in the exterior edge face of ring be welded on and be positioned on the refractory alloy sheet of skeleton in, the interior edge face of outer shroud is welded on the refractory alloy sheet that is positioned at the skeleton outermost.
6. HTHP elastic packing pad according to claim 5 is characterized in that the width of said skeleton is 20-50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100774681A CN102606822A (en) | 2012-03-21 | 2012-03-21 | High-temperature high-pressure elastic sealing gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100774681A CN102606822A (en) | 2012-03-21 | 2012-03-21 | High-temperature high-pressure elastic sealing gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102606822A true CN102606822A (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100774681A Pending CN102606822A (en) | 2012-03-21 | 2012-03-21 | High-temperature high-pressure elastic sealing gasket |
Country Status (1)
| Country | Link |
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| CN (1) | CN102606822A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2351764Y (en) * | 1999-01-08 | 1999-12-01 | 中国科学院上海硅酸盐研究所 | Improved high temperature (420 degree centigrade) piezoelectric accelerometer |
| WO2009058738A2 (en) * | 2007-11-02 | 2009-05-07 | Lamons Gasket Company | Spiral-wound gasket |
| CN201250971Y (en) * | 2008-08-25 | 2009-06-03 | 浙江国泰密封材料股份有限公司 | Low pre-tightening force spirotallic gasket |
| CN201884649U (en) * | 2010-11-04 | 2011-06-29 | 洛阳永定密封件有限公司 | Metal spiral wound gasket with double fixing rings |
| CN202469302U (en) * | 2012-03-21 | 2012-10-03 | 浙江高中压阀门有限公司 | High-temperature high-pressure elastic sealing gasket |
-
2012
- 2012-03-21 CN CN2012100774681A patent/CN102606822A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2351764Y (en) * | 1999-01-08 | 1999-12-01 | 中国科学院上海硅酸盐研究所 | Improved high temperature (420 degree centigrade) piezoelectric accelerometer |
| WO2009058738A2 (en) * | 2007-11-02 | 2009-05-07 | Lamons Gasket Company | Spiral-wound gasket |
| CN201250971Y (en) * | 2008-08-25 | 2009-06-03 | 浙江国泰密封材料股份有限公司 | Low pre-tightening force spirotallic gasket |
| CN201884649U (en) * | 2010-11-04 | 2011-06-29 | 洛阳永定密封件有限公司 | Metal spiral wound gasket with double fixing rings |
| CN202469302U (en) * | 2012-03-21 | 2012-10-03 | 浙江高中压阀门有限公司 | High-temperature high-pressure elastic sealing gasket |
Non-Patent Citations (2)
| Title |
|---|
| 《中华人民共和国机械行业标准》 20050923 中华人名共和国国家发展和改革委员会 柔性石墨金属缠绕垫片 , * |
| 中华人名共和国国家发展和改革委员会: "柔性石墨金属缠绕垫片", 《中华人民共和国机械行业标准》, 23 September 2005 (2005-09-23) * |
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Application publication date: 20120725 |