CN102564859A - Instability test device of external pressure vessel - Google Patents
Instability test device of external pressure vessel Download PDFInfo
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- CN102564859A CN102564859A CN2011104437729A CN201110443772A CN102564859A CN 102564859 A CN102564859 A CN 102564859A CN 2011104437729 A CN2011104437729 A CN 2011104437729A CN 201110443772 A CN201110443772 A CN 201110443772A CN 102564859 A CN102564859 A CN 102564859A
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Abstract
The invention discloses an instability test device of an external pressure vessel. The instability test device comprises a cylinder body, a test frame, a flange, a flange cover, a pressing cover, an exhaust valve, a security valve, a digital display pressure meter, a computer, a pressure source, a water discharging valve of a buffering tank, a water discharging valve of the cylinder body, the buffering tank and a pressure sensor. When in use, the instability test device is used for pressurizing to the cylinder body, so that instability test data of a vessel to be measured can be measured under an effect of uniformly distributing external pressure on the circumference or combined circumference external pressure and axial loading effect. The instability test device has the characteristics of simple structure, accurate measurement and real-time data recording.
Description
Technical field
The present invention relates to bearing device experimental technique field, relate in particular to a kind of external pressure vessel unstability test unit.
Background technology
The pressure vessel of daily life at present and commercial production widespread use much is that pressure condition is worked down outside.For external pressure cylinder, main design problem is not an intensity, but stability; Guarantee its not the condition of unstability be that design pressure allowable is less than critical pressure in buckling.Therefore, emergent pressure is to judge the main foundation of external pressure thin cylinder unstability.The design formula of confirming emergent pressure is an experimental formula often, and error is bigger, can not be found the solution accurately, causes a lot of inconvenience to practical applications.For fear of because the external pressure effect causes the unexpected external pressure unstability of cylinder to bring the engineering loss and the potential safety hazard of Unpredictability, a kind of Mechanics Performance Testing device of external pressure vessel need be provided.
Though Chinese patent ZL200920032926.3 provides a kind of thin-wall pipe external pressure unstability test unit, it does not consider to eliminate the influence of axial load to the test specimen buckling pressure, thereby can not test be provided to only bearing the pipe fitting that is uniformly distributed with circumferential outer compressive load.And it only is applicable to thin-wall pipe, and usable range is narrower.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of external pressure vessel unstability test unit, solving external pressure vessel perhaps only is circumferentially to be uniformly distributed with the destabilization problems that exists under the external pressure effect under circumferential external pressure and axial load synergy.
In order to achieve the above object; The technical scheme that the present invention adopts is: a kind of external pressure vessel unstability test unit; Said container is a testing container, and it comprises: cylindrical shell, test stand, flange, blind flange, gland, vent valve, safety valve, numeral show tensimeter, computing machine, pressure source, surge tank draining valve, cylindrical shell draining valve, surge tank and pressure transducer; Wherein, Said cylindrical shell is fixed on the test stand, and flange is welded on the cylindrical shell, and blind flange is connected with flange; Gland is fixed on testing container on the blind flange; Blind flange and gland center all have through hole, and cylinder lateral wall shows that with vent valve, safety valve, numeral tensimeter and pressure transducer communicate respectively through pipeline, and computing machine links to each other with pressure transducer; The cylindrical shell bottom links to each other with surge tank, and surge tank is connected with pressure source, and the cylindrical shell draining valve is housed on the outlet conduit of cylindrical shell, and the surge tank draining valve is housed on the outlet conduit of surge tank.
Further, also comprise a push rod, the bottom of said push rod contacts with the bottom of testing container, and the top of push rod is fixed on the blind flange.
Further, comprise that also one places the pad and that seals between blind flange and the flange to place the O RunddichtringO that seals between blind flange and the gland.
The invention has the beneficial effects as follows; External pressure vessel unstability test unit of the present invention can test container external pressure performance under circumferentially external pressure and axial load synergy; Can only bear the external pressure performance that is uniformly distributed with circumferential external pressure effect by test container again; Tested object is not limited to the test unit of external pressure thin-wall pipe simultaneously, and is significant for accuracy, the safe operation under the external pressure operating mode of assurance container of raising external pressure vessel critical pressure in buckling.
Description of drawings
Accompanying drawing is the structure principle chart of apparatus of the present invention;
Among the figure: cylindrical shell 1, push rod 2, test stand 3, flange 4, blind flange 5, screw 6, O RunddichtringO 7, testing container 8, gland 9, pad 10, bolt 11, vent valve 12, safety valve 13, numeral show tensimeter 14, computing machine 15, pressure source 16, surge tank draining valve 17, cylindrical shell draining valve 18, surge tank 19, pressure transducer 20.
Embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and principle of work are described in detail.
As shown in Figure 1; External pressure vessel unstability test unit of the present invention comprises: cylindrical shell 1, test stand 3, flange 4, blind flange 5, gland 9, vent valve 12, safety valve 13, numeral show tensimeter 14, computing machine 15, pressure source 16, surge tank draining valve 17, cylindrical shell draining valve 18, surge tank 19 and pressure transducer 20.
Wherein, cylindrical shell 1 is fixed on the test stand 3, and flange 4 is welded on the cylindrical shell 1, and blind flange 5 is connected with flange 4 through bolt 11, and pad 10 places between blind flange 5 and the flange 4, seals; Gland 9 is pressed on testing container 8 above the blind flange 5 through screw 6, and O RunddichtringO 7 places between blind flange 5 and the gland 9, seals; Blind flange 5 all has through hole with gland 9 centers; Testing container 8 inside and atmosphere; Cylindrical shell 1 side shows that with vent valve 12, safety valve 13, numeral tensimeter 14 and pressure transducer 20 communicate respectively through pipeline; Computing machine 15 links to each other with pressure transducer 20, and computing machine 15 is through the pressure in the pressure transducer 20 real time record cylindrical shells 1, and cylindrical shell 1 bottom links to each other with surge tank 19; Surge tank 19 is connected with pressure source 16, is equipped with on the outlet conduit of cylindrical shell 1 on the outlet conduit of cylindrical shell draining valve 18, surge tank surge tank draining valve 17 is housed.
External pressure vessel unstability test unit of the present invention can also comprise a push rod 2, and the bottom of push rod 2 contacts with the bottom of testing container 8, and screw retention is passed through on blind flange 5 in the top of push rod 2.
The course of work of the present invention is following:
1, tights a bolt 11 before the test, make flange 4 closely be connected with blind flange 5.Cylindrical shell draining valve 18 is in closed condition at this moment with surge tank draining valve 17.
2, cylindrical shell 1 is filled water, put testing container 8 in the circular hole of the blind flange 5 that is lined with O RunddichtringO 7 into then, tighten screw 6, gland 9 is fixed on the blind flange 5, thus fixing testing container 8; Push rod 2 is installed then to eliminate axial force (, then removing push rod 2) if need consider circumferential external pressure and axial load synergy simultaneously.
3, open pressure source 16 (pressure source 16 can be wobble pump); Add low pressure in advance and discharged the gas in the cylindrical shell 1 by vent valve 12, exhaust is closed vent valve 12 after finishing, and slowly pressurizes through pressure source 16; Pressure is in surge tank 19 passes to cylindrical shell 1; When testing container 8 sent sound owing to the external pressure unstability, numeral showed that tensimeter 14 shows the force value that this moment is concrete, and simultaneous computer 15 also can write down all force value in the process of the test automatically.
4, test is accomplished, and closing presure source 16 is opened cylindrical shell draining valve 18 and carried out pressure release with surge tank draining valve 17, and pressure release is opened gland 9 after accomplishing, and takes out testing container 8.
The present invention also can be used as the external pressure experimental teaching unit of pressure vessel course, and being provided with of safety valve guaranteed the security of imparting knowledge to students.
Claims (4)
1. external pressure vessel unstability test unit; Said container is testing container (8); It is characterized in that it comprises: cylindrical shell (1), test stand (3), flange (4), blind flange (5), gland (9), vent valve (12), safety valve (13), numeral show tensimeter (14), computing machine (15), pressure source (16), surge tank draining valve (17), cylindrical shell draining valve (18), surge tank (19) and pressure transducer (20) etc.; Wherein, Said cylindrical shell (1) is fixed on the test stand (3); Flange (4) is welded on the cylindrical shell (1); Blind flange (5) is connected with flange (4), and gland (9) is fixed on testing container (8) on the blind flange (5), and blind flange (5) and gland (9) center all have through hole; Cylindrical shell (1) sidewall shows that with vent valve (12), safety valve (13), numeral tensimeter (14) and pressure transducer (20) communicate respectively through pipeline, and computing machine (15) links to each other with pressure transducer (20); Cylindrical shell (1) bottom links to each other with surge tank (19), and surge tank (19) is connected with pressure source (16), and cylindrical shell draining valve (18) is housed on the outlet conduit of cylindrical shell (1), and surge tank draining valve (17) is housed on the outlet conduit of surge tank.
2. according to the said external pressure vessel unstability of claim 1 test unit, it is characterized in that, can also comprise a push rod (2), the bottom of said push rod (2) contacts with the bottom of testing container (8), and the top of push rod (2) is fixed on the blind flange (5).
3. according to the said external pressure vessel unstability of claim 1 test unit, it is characterized in that, can also comprise that one places the pad (10) that seals between blind flange (5) and the flange (4).
4. according to the said external pressure vessel unstability of claim 1 test unit, it is characterized in that, can also comprise that one places the O RunddichtringO (7) that seals between blind flange (5) and the gland (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110443772.9A CN102564859B (en) | 2011-12-27 | 2011-12-27 | Instability test device of external pressure vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110443772.9A CN102564859B (en) | 2011-12-27 | 2011-12-27 | Instability test device of external pressure vessel |
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| CN102564859A true CN102564859A (en) | 2012-07-11 |
| CN102564859B CN102564859B (en) | 2014-07-02 |
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| CN201110443772.9A Expired - Fee Related CN102564859B (en) | 2011-12-27 | 2011-12-27 | Instability test device of external pressure vessel |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759100A (en) * | 2014-02-25 | 2014-04-30 | 大连理工大学 | Adjustable reinforcing ring device used for stability experiment of external pressure vessel |
| CN105571952A (en) * | 2016-02-02 | 2016-05-11 | 浙江大学 | Hyperbaric cabin device for external pressure test of pressure container model |
| CN105699197A (en) * | 2016-02-02 | 2016-06-22 | 浙江大学 | High-pressure testing cabin with high-speed photographing function |
| CN106644537A (en) * | 2016-09-20 | 2017-05-10 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | External pressure fatigue test device for shell structure with built-in energy storage device |
| CN107287402A (en) * | 2017-06-02 | 2017-10-24 | 浙江大学 | A kind of method for improving thin-walled pressure vessel stability of external pressure |
| CN108362568A (en) * | 2018-04-25 | 2018-08-03 | 西南石油大学 | A kind of novel external pressure unstability experimental provision |
| CN111999085A (en) * | 2020-08-14 | 2020-11-27 | 常州大学 | Spiral plate stability determination experimental device |
| CN113433007A (en) * | 2021-06-25 | 2021-09-24 | 武汉钢铁有限公司 | Tank deformation instability fatigue cracking test method |
| CN113607560A (en) * | 2021-07-27 | 2021-11-05 | 浙江工业大学 | Horizontal external pressure experimental device |
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| JP2824827B2 (en) * | 1994-10-26 | 1998-11-18 | 三菱化学株式会社 | Pressure test method and equipment for pressure vessels |
| CN201397272Y (en) * | 2009-05-04 | 2010-02-03 | 陕西科技大学 | Thin walled pipe external pressure instability testing unit |
| CN202393655U (en) * | 2011-12-27 | 2012-08-22 | 浙江大学 | Instability experiment device of external pressure vessel |
-
2011
- 2011-12-27 CN CN201110443772.9A patent/CN102564859B/en not_active Expired - Fee Related
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| JP2824827B2 (en) * | 1994-10-26 | 1998-11-18 | 三菱化学株式会社 | Pressure test method and equipment for pressure vessels |
| CN201397272Y (en) * | 2009-05-04 | 2010-02-03 | 陕西科技大学 | Thin walled pipe external pressure instability testing unit |
| CN202393655U (en) * | 2011-12-27 | 2012-08-22 | 浙江大学 | Instability experiment device of external pressure vessel |
Non-Patent Citations (3)
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| 化学工业部人事教育司 等: "《化工压力容器》", 31 January 1997, 化学工业出版社, article "压力容器的法兰", pages: 74-87 * |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759100A (en) * | 2014-02-25 | 2014-04-30 | 大连理工大学 | Adjustable reinforcing ring device used for stability experiment of external pressure vessel |
| CN105699197B (en) * | 2016-02-02 | 2019-10-18 | 浙江大学 | A kind of high-potting cabin with high-speed camera function |
| CN105571952A (en) * | 2016-02-02 | 2016-05-11 | 浙江大学 | Hyperbaric cabin device for external pressure test of pressure container model |
| CN105699197A (en) * | 2016-02-02 | 2016-06-22 | 浙江大学 | High-pressure testing cabin with high-speed photographing function |
| CN106644537A (en) * | 2016-09-20 | 2017-05-10 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | External pressure fatigue test device for shell structure with built-in energy storage device |
| CN107287402A (en) * | 2017-06-02 | 2017-10-24 | 浙江大学 | A kind of method for improving thin-walled pressure vessel stability of external pressure |
| CN108362568A (en) * | 2018-04-25 | 2018-08-03 | 西南石油大学 | A kind of novel external pressure unstability experimental provision |
| CN108362568B (en) * | 2018-04-25 | 2023-10-13 | 西南石油大学 | Experimental method of external pressure instability test device |
| CN111999085A (en) * | 2020-08-14 | 2020-11-27 | 常州大学 | Spiral plate stability determination experimental device |
| CN111999085B (en) * | 2020-08-14 | 2022-05-20 | 常州大学 | Experimental device for measuring stability of spiral plate |
| CN113433007A (en) * | 2021-06-25 | 2021-09-24 | 武汉钢铁有限公司 | Tank deformation instability fatigue cracking test method |
| CN113607560A (en) * | 2021-07-27 | 2021-11-05 | 浙江工业大学 | Horizontal external pressure experimental device |
| CN113607560B (en) * | 2021-07-27 | 2024-01-30 | 浙江工业大学 | Horizontal outer pressure testing device |
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|---|---|
| CN102564859B (en) | 2014-07-02 |
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Granted publication date: 20140702 Termination date: 20191227 |