CN102564859B - Instability test device of external pressure vessel - Google Patents
Instability test device of external pressure vessel Download PDFInfo
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- CN102564859B CN102564859B CN201110443772.9A CN201110443772A CN102564859B CN 102564859 B CN102564859 B CN 102564859B CN 201110443772 A CN201110443772 A CN 201110443772A CN 102564859 B CN102564859 B CN 102564859B
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- external pressure
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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 instability test device of external pressure vessel.
Background technology
The pressure vessel of daily life at present and commercial production widespread use is much worked under pressure condition outside.For external pressure cylinder, main design problem is not 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 the Main Basis that judges external pressure thin cylinder unstability.The design formula of determining emergent pressure is often experimental formula, and error is larger, can not be solved accurately, and to engineering, application causes a lot of inconvenience.Bring engineering loss and the potential safety hazard of Unpredictability for fear of the unexpected external pressure unstability that causes cylinder due to external pressure effect, a kind of Mechanics Performance Testing device of external pressure vessel need to be provided.
Although Chinese patent ZL200920032926.3 provides a kind of thin walled pipe external pressure instability testing unit, it does not consider to eliminate the impact of axial load on test specimen buckling pressure, thereby can not provide test to only bearing the uniform circumferentially pipe fitting of outer compressive load.And it is only applicable to thin-wall pipe, 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 instability test device of external pressure vessel, solve external pressure vessel under circumferentially external pressure and axial load synergy or be only the destabilization problems existing under circumferential uniform external pressure effect.
In order to achieve the above object, the technical solution used in the present invention is: a kind of instability test device of external pressure vessel, described container is testing container, and it comprises: cylindrical shell, test stand, flange, blind flange, gland, vent valve, safety valve, pressure gauge with digital display, computing machine, pressure source, surge tank draining valve, cylindrical shell draining valve, surge tank and pressure transducer; Wherein, described cylindrical shell is fixed on test stand, flange welding is on cylindrical shell, blind flange is connected with flange, gland is fixed on testing container on blind flange, blind flange and gland center all have through hole, and cylinder lateral wall communicates with vent valve, safety valve, pressure gauge with digital display and pressure transducer respectively by pipeline, and computing machine is connected with pressure transducer; Cylinder body bottom is connected with surge tank, and surge tank is connected with pressure source, and cylindrical shell draining valve is housed on the outlet conduit of cylindrical shell, and surge tank draining valve is housed on the outlet conduit of surge tank.
Further, also comprise a push rod, the bottom of described push rod contacts with the bottom of testing container, and the top of push rod is fixed on blind flange.
Further, also comprise that one is placed in the pad and sealing between blind flange and flange and is placed in the O RunddichtringO sealing between blind flange and gland.
The invention has the beneficial effects as follows, instability test device of external pressure vessel of the present invention can test container external pressure performance under circumferentially external pressure and axial load synergy, again can test container only bear the external pressure performance of uniform circumferential external pressure effect, tested object is not limited to the test unit of external pressure thin-wall pipe simultaneously, significant for the accuracy, the safe operation under external pressure operating mode of assurance container that improve external pressure vessel critical pressure in buckling.
Accompanying drawing explanation
Accompanying drawing is the structure principle chart of apparatus of the present invention;
In 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, pressure gauge with digital display 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, instability test device of external pressure vessel of the present invention, comprising: cylindrical shell 1, test stand 3, flange 4, blind flange 5, gland 9, vent valve 12, safety valve 13, pressure gauge with digital display 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 test stand 3, and flange 4 is welded on cylindrical shell 1, and blind flange 5 is connected with flange 4 by bolt 11, and pad 10 is placed between blind flange 5 and flange 4, seals; Gland 9 is pressed on testing container 8 above blind flange 5 by screw 6, and O RunddichtringO 7 is placed between blind flange 5 and gland 9, seals; Blind flange 5 and gland 9 centers all have through hole, testing container 8 is inner to communicate with atmosphere, cylindrical shell 1 side communicates with vent valve 12, safety valve 13, pressure gauge with digital display 14 and pressure transducer 20 respectively by pipeline, computing machine 15 is connected with pressure transducer 20, computing machine 15 is by the pressure in pressure transducer 20 real time record cylindrical shells 1, cylindrical shell 1 bottom is connected with surge tank 19, surge tank 19 is connected with pressure source 16, is equipped with on the outlet conduit of cylindrical shell draining valve 18, surge tank surge tank draining valve 17 is housed on the outlet conduit of cylindrical shell 1.
Instability test device of external pressure vessel 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 the top of push rod 2 is fixed by screws on blind flange 5.
The course of work of the present invention is as follows:
1, before test, tight a bolt 11, flange 4 is closely connected with blind flange 5.Cylindrical shell draining valve 18 and surge tank draining valve 17 are now in closed condition.
2, cylindrical shell 1 is filled to water, then testing container 8 is put in the circular hole of blind flange 5 that is lined with O RunddichtringO 7, tighten screw 6, gland 9 is fixed on blind flange 5, thus fixing testing container 8; Then push rod 2 is installed to eliminate axial force (if desired consider circumferential external pressure and axial load synergy, push rod 2 is removed) simultaneously.
3, opening pressure source 16(pressure source 16 can be wobble pump), adding in advance low pressure is discharged the gas in cylindrical shell 1 by vent valve 12, after finishing, exhaust closes vent valve 12, slowly pressurize by pressure source 16, pressure is in surge tank 19 passes to cylindrical shell 1, until testing container 8 is while sending sound due to external pressure unstability, pressure gauge with digital display 14 shows now concrete force value, and simultaneous computer 15 also can record all force value in process of the test automatically.
4, tested, closing presure source 16, opens cylindrical shell draining valve 18 and surge tank draining valve 17 carries out pressure release, after pressure release completes, opens gland 9, takes out testing container 8.
The present invention also can be used as the external pressure experiment instructional device of pressure vessel course, and arranging of safety valve guaranteed the security of imparting knowledge to students.
Claims (3)
1. an instability test device of external pressure vessel, described container is testing container (8), it is characterized in that, it comprises: cylindrical shell (1), push rod (2), test stand (3), flange (4), blind flange (5), gland (9), vent valve (12), safety valve (13), pressure gauge with digital display (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, described cylindrical shell (1) is fixed on test stand (3), flange (4) is welded on cylindrical shell (1), blind flange (5) is connected with flange (4), gland (9) is fixed on testing container (8) on blind flange (5), blind flange (5) and gland (9) center all have through hole, cylindrical shell (1) sidewall communicates with vent valve (12), safety valve (13), pressure gauge with digital display (14) and pressure transducer (20) respectively by pipeline, and computing machine (15) is connected with pressure transducer (20); Cylindrical shell (1) bottom is connected 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; The bottom of described push rod (2) contacts with the bottom of testing container (8), and the top of push rod (2) is fixed on blind flange (5).
2. instability test device of external pressure vessel according to claim 1, is characterized in that, also comprises that one is placed in the pad (10) sealing between blind flange (5) and flange (4).
3. instability test device of external pressure vessel according to claim 1, is characterized in that, also comprises that one is placed in the O RunddichtringO (7) sealing between blind flange (5) and 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102564859A CN102564859A (en) | 2012-07-11 |
| CN102564859B true CN102564859B (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Families Citing this family (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 |
| CN105699197B (en) * | 2016-02-02 | 2019-10-18 | 浙江大学 | A kind of high-potting cabin with high-speed camera function |
| CN106644537B (en) * | 2016-09-20 | 2019-04-05 | 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） | Shell Structures Under External Pressure fatigue experimental device with built-in accumulator |
| CN107287402B (en) * | 2017-06-02 | 2018-10-02 | 浙江大学 | A method of improving thin-walled pressure vessel stability of external pressure |
| CN108362568B (en) * | 2018-04-25 | 2023-10-13 | 西南石油大学 | Experimental method of external pressure instability test device |
| CN111999085B (en) * | 2020-08-14 | 2022-05-20 | 常州大学 | Experimental device for measuring stability of spiral plate |
| CN113433007B (en) * | 2021-06-25 | 2022-10-11 | 武汉钢铁有限公司 | Tank deformation instability fatigue cracking test method |
| CN113607560B (en) * | 2021-07-27 | 2024-01-30 | 浙江工业大学 | Horizontal outer pressure testing device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN102564859A (en) | 2012-07-11 |
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