CN202176714U - Seal gasket capable of controlling stress relaxation scope - Google Patents
Seal gasket capable of controlling stress relaxation scope Download PDFInfo
- Publication number
- CN202176714U CN202176714U CN2011200343342U CN201120034334U CN202176714U CN 202176714 U CN202176714 U CN 202176714U CN 2011200343342 U CN2011200343342 U CN 2011200343342U CN 201120034334 U CN201120034334 U CN 201120034334U CN 202176714 U CN202176714 U CN 202176714U
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- Prior art keywords
- stress relaxation
- gasket
- gasket seal
- pad
- seal gasket
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Abstract
A seal gasket capable of controlling stress relaxation scope is generally used for important sealing connection such as pipeline flange connection, valves and pressure containers. A sensor is inlaid in the gasket and connected with an outer computer. The gasket can analyze an important performance parameter of the gasket-stress relaxation through real-time understanding of temperature and pressure of the seal gasket, enable the stress relaxation of the seal gasket to be in a monitor state at all time, analyze whether stress relaxation parameters meet design requirements or not by understanding the stress relaxation parameters, and timely understand a sealing function state of the seal gasket.
Description
Technical field
The present invention relates to the seal ring of a kind of gasket seal that is widely used in pressurized container, piping flange, pump, the valve, especially high temperature, high pressure and extremely important sealed member.
Background technique
At high temperature, high pressure and extremely important working condition, must consider following gasket seal technical order: 1, guarantee run duration under the situation of temperature and pressure alternation leak-down rate all the time in the design load scope; 2, under various bad working environments, in time understand imminent leak-down rate situation, make the leakage situation in the monitoring state all the time; This situation is such as the voltage stabilizer of nuclear power station, reactor pressure vessel, spentnuclear fuel treatment device etc.; In time find to be about to the leakage that produces, the prevention of accident is played an important role; And adopt usually at present: solid torus pad, spirotallic gasket, grooved metal gasket, turbine pad etc. all do not have this function.
Therefore the invention provides a kind of gasket seal of controlled stress relaxation rate scope; Through built-in sensor; Make pad in the monitoring state at any time; Whether the stress that makes primary sealing area can anticipation be grasped Graphite pad and is in which kind of leak condition all the time in the regulation stress range, meet design requirement.
Summary of the invention
The invention provides a kind of gasket seal of controlled stress relaxation rate scope; This gasket seal is through the residing temperature of sensor measurement pad, pressure; Can understand the important performance characteristic-stress relaxation rate of pad at any time through measuring these indexs, make gasket seal in the monitoring state at any time, through understanding the stress relaxation rate parameter; Whether which kind of leak condition analysis and anticipation pad are in, meet design requirement.
The purpose of this invention is to provide the intellectuality that realizes pad, the cooperation through conventional seals pad and sensor, computer makes this pad become the gasket seal of controlled stress relaxation rate scope, makes the sealability of pad in the monitoring state at any time.
The gasket seal inside and outside ring of this controlled stress relaxation rate scope is that metal comprises: 1, metal outer shroud; 2, ring in the metal; 3, Expanded graphite or PTFE; 4, sensor, this sensor can be measured the residing temperature of pad, pressure and these data are transmitted; 5, computer: the data that the Computer Analysis sensor spreads out of; Draw this important gasket performance desired value of stress relaxation rate; And desired value analyzed, draw conclusion and the working state in following a period of time of anticipation that whether pad is in the working state that meets design requirement.
Description of drawings
According to the description and the accompanying drawing of hereinafter, can understand the present invention well, these accompanying drawings have shown non-restrictive example of the present invention.More particularly, in the accompanying drawings:
Further explain below in conjunction with instance:
Fig. 1 is the axial section of pressurized container, contains the sealing of embodiments of the invention junction point between pressure container cylinder flange and top cover flange.
Fig. 2 is the sectional view of gasket seal of the controlled stress relaxation rate scope of the embodiment of the invention shown in Fig. 1.
1, ring in the stainless steel, 2, the stainless steel outer shroud, 3, content is pure Expanded graphite or PTFE more than 99%, 4, sensor; 5, computer, 6, flange, 7, ozzle, 8, top cover; 9, pressurized container supporting surface, 10, ring segment, 11, guiding device, 12 shells
Embodiment
Shown in Figure 1 is the pressurized container of high temperature, pressure coolant; Cylindrical shell 12 is welded with freezing mixture by the flange of a strap bolt tapped hole 6, one and imports and exports the ring segment 10 of ozzle 7, a changeover portion and a semicircle lower seal head and be welded; Wherein top cover 8 is hot pressed into semicircle by steel plate; Be drilled with bolt hole at upper flange 6 upper peripheries, have on its supporting surface and place groove of the present invention.When high temperature, pressure coolant flow in pressurized container; Wherein some inwall along pressurized container directly flows to the pressure vessel outlet adapter; And follow the variation of temperature and pressure; Because pressure vessels top cover and shell flange are two independent parts of making, in pressurized container, must be assembled together and will guarantee high leak tightness, internal pressure will be far longer than the external pressure that pressurized container belongs to during the pressurized container operation; For preventing that freezing mixture from leaking, a kind of gasket seal of controlled stress relaxation rate scope is installed between pressure container cylinder and top cover.
Junction point will bear in the course of the work between pressure container cylinder and the top cover; Expansion that hot coolant produces and contraction and the radial and axial STRESS VARIATION that causes; This variation is very easy to produce and leaks, and still the initial stage of this leakage can't be detected, and when begins leakage and unclear; The present invention is with the simple and effective leakage situation of anticipation seal arrangement of a kind of gasket seal of controlled stress relaxation rate scope.
Through sectional view shown in Fig. 2, the present invention is able to clearer and more definite description.The gasket seal of this controlled stress relaxation rate scope is made up of five parts, comprising: 1, ring in the stainless steel, 2, the stainless steel outer shroud, 3, content is pure Expanded graphite or the primary sealing area of PTFE more than 99%, 4, sensor, 5, computer.
Should be understood that above-mentioned material does not limit the present invention, can also use the different other materials of hardness, like nonmetallic material or other metallic material such as modification varicosity tetrafluoros.
In preferred embodiment; Interior ring 1 is a stainless steel; Outer shroud 2 is a stainless steel, is that primary sealing area 3,3 is pure Expanded graphite or the PTFE of content more than 99% in the middle of the gasket seal; Two kinds of material stiffnesses of in 3 this are far smaller than the stainless steel inside and outside ring and height E is greater than interior 1 the height F that encircles, and the height F of interior ring 1 should be greater than the height e of outer shroud 2; When the pretightening force pretension; Middle pure Expanded graphite or PTFE more than 99% at first are compressed; And then the increase pretightening force, make the interior ring of stainless steel reach sufficient stress, built-in sensors 4 in middle pure Expanded graphite more than 99% or the PTFE sealing surface; Continuous variation meeting owing to environment during pad work produces stress relaxation on pad; This stress relaxation plays first meeting and in stainless steel, encircles and relax, and then can be to relax on pure Expanded graphite or the PTFE more than 99% at primary sealing area-content, and on primary sealing area, relaxing must be less than 10%.Built-in sensors can be measured temperature, the pressure of pad working environment of living under the pad working state; These parameters are given computer 5 through sensor with data transmission; Computer is analyzed these data; Draw pad and be in which kind of stress relaxation state, the stress relaxation rate that whether on primary sealing area, carries out is less than 10% conclusion.
Should be appreciated that the example that accompanying drawing has only shown to be provided via practical demonstration of the present invention, can change its form and configuration, but can not break away from the scope of the design that the present invention is based on.Any reference mark that in subsidiary claims, provides is that specification and accompanying drawing are read for ease of reference purely, and they do not limit the protection domain of being represented by claim.
Claims (3)
1. the gasket seal of a controlled stress relaxation rate scope comprises:
This gasket seal is generally used in being tightly connected of piping flange connection and valve and pressurized container; Built-in sensors in pad, sensor is connected with outer computer;
It is characterized in that:
Form by three parts: pad, sensor, computer.
2. gasket seal according to claim 1; It is characterized in that: inside and outside ring is a metal; The centre is Expanded graphite or PTFE material, and the centre will be higher than the interior height that encircles for the height of the sealing surface of Expanded graphite or PTFE material, and the height of interior ring will be higher than the height of outer shroud.
3. gasket seal according to claim 1 is characterized in that: built-in sensors in pure graphite and PTFE material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200343342U CN202176714U (en) | 2011-02-01 | 2011-02-01 | Seal gasket capable of controlling stress relaxation scope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200343342U CN202176714U (en) | 2011-02-01 | 2011-02-01 | Seal gasket capable of controlling stress relaxation scope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202176714U true CN202176714U (en) | 2012-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200343342U Expired - Lifetime CN202176714U (en) | 2011-02-01 | 2011-02-01 | Seal gasket capable of controlling stress relaxation scope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202176714U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478386A (en) * | 2017-09-07 | 2017-12-15 | 重庆科技学院 | A kind of method for testing special thread sealing surface high temperature contact stress relaxation |
| CN112524365A (en) * | 2020-12-17 | 2021-03-19 | 中国成达工程有限公司 | Combined sealing gasket suitable for various working conditions |
-
2011
- 2011-02-01 CN CN2011200343342U patent/CN202176714U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478386A (en) * | 2017-09-07 | 2017-12-15 | 重庆科技学院 | A kind of method for testing special thread sealing surface high temperature contact stress relaxation |
| CN107478386B (en) * | 2017-09-07 | 2023-10-20 | 重庆科技学院 | Method for testing high-temperature contact stress relaxation of special thread sealing surface |
| CN112524365A (en) * | 2020-12-17 | 2021-03-19 | 中国成达工程有限公司 | Combined sealing gasket suitable for various working conditions |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120328 |
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| CX01 | Expiry of patent term |