CN202469302U - High-temperature high-pressure elastic sealing gasket - Google Patents

High-temperature high-pressure elastic sealing gasket Download PDF

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Publication number
CN202469302U
CN202469302U CN201220109974XU CN201220109974U CN202469302U CN 202469302 U CN202469302 U CN 202469302U CN 201220109974X U CN201220109974X U CN 201220109974XU CN 201220109974 U CN201220109974 U CN 201220109974U CN 202469302 U CN202469302 U CN 202469302U
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CN
China
Prior art keywords
temperature
ring
alloy sheet
refractory alloy
skeleton
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN201220109974XU
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Chinese (zh)
Inventor
文体杰
章贤根
朱郁玮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHEJIANG HIGH AND MIDDLE PRESSURE VALVE CO Ltd
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ZHEJIANG HIGH AND MIDDLE PRESSURE VALVE CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Priority to CN201220109974XU priority Critical patent/CN202469302U/en
Application granted granted Critical
Publication of CN202469302U publication Critical patent/CN202469302U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a high-temperature high-pressure elastic sealing gasket. According to the existing method, the high-temperature high-pressure pipe and a valve are commonly connected through welding; therefore, the valve and the pipe are extremely inconvenient to maintain, especially the valve needs to be frequently disassembled, and the pipe is cut frequently, and thus the pipe become shorter and shorter. The high-temperature high-pressure elastic sealing gasket is characterized by comprising an inner ring, an outer ring and an annular skeleton, the inner ring and the outer ring are made of high temperature-resistant steel, the annular skeleton is positioned between the inner ring and the outer ring and comprises a plurality of annular high-temperature alloy sheets with left bracket-shaped sections, a plurality of high-temperature alloy sheets are arranged into a row, and at least one layer of high temperature-resistant flexible graphite ribbons are arranged between the adjacent high-temperature alloy sheets. According to the utility model, the shrinkage and reset functions of the sealing gasket can be utilized to ensure the sealing property with a flange in temperature rise and after temperature rise, and the problem caused by temperature rise lagging of a bolt is solved.

Description

A kind of HTHP elastic packing pad
Technical field
The utility model 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.
The model utility content
The utility model technical problem to be solved 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 utility model adopts following technological scheme: a kind of 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 utility model 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 utility model is described further.
Description of drawings
Fig. 1 is the structural representation (sectional view of half structure) of the utility model.
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.
CN201220109974XU 2012-03-21 2012-03-21 High-temperature high-pressure elastic sealing gasket Expired - Lifetime CN202469302U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201220109974XU CN202469302U (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
CN201220109974XU CN202469302U (en) 2012-03-21 2012-03-21 High-temperature high-pressure elastic sealing gasket

Publications (1)

Publication Number Publication Date
CN202469302U true CN202469302U (en) 2012-10-03

Family

ID=46917460

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201220109974XU Expired - Lifetime CN202469302U (en) 2012-03-21 2012-03-21 High-temperature high-pressure elastic sealing gasket

Country Status (1)

Country Link
CN (1) CN202469302U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606822A (en) * 2012-03-21 2012-07-25 浙江高中压阀门有限公司 High-temperature high-pressure elastic sealing gasket
CN104074975A (en) * 2014-06-13 2014-10-01 慈溪市恒立密封材料有限公司 Low-stress efficient sealing gasket and manufacturing method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606822A (en) * 2012-03-21 2012-07-25 浙江高中压阀门有限公司 High-temperature high-pressure elastic sealing gasket
CN104074975A (en) * 2014-06-13 2014-10-01 慈溪市恒立密封材料有限公司 Low-stress efficient sealing gasket and manufacturing method thereof

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Granted publication date: 20121003

CX01 Expiry of patent term