CN202393655U - Instability experiment device of external pressure vessel - Google Patents
Instability experiment device of external pressure vessel Download PDFInfo
- Publication number
- CN202393655U CN202393655U CN2011205540347U CN201120554034U CN202393655U CN 202393655 U CN202393655 U CN 202393655U CN 2011205540347 U CN2011205540347 U CN 2011205540347U CN 201120554034 U CN201120554034 U CN 201120554034U CN 202393655 U CN202393655 U CN 202393655U
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- cylindrical shell
- external pressure
- flange
- surge tank
- blind flange
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Abstract
The utility model discloses an instability experiment device of an external pressure vessel, which comprises a tube body, an experiment frame, a flange, a flange cover, a press cover, an air exhaust valve, a safety valve, a digital display pressure meter, a computer, a pressure source, a buffer tank water discharge valve, a tube body water discharge valve, a buffer tank and a pressure sensor. In work, the tube body is pressurized, and instability experiment data of a container to be tested under the effect of circumferential even distribution external pressure or under the combining effect of circumferential external pressure and axial load can be measured. The instability experiment device has the advantages of being simple in structure, accurate in measurement and capable of recording data in real time.
Description
Technical field
The utility model relates to bearing device experimental technique field, relates 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 purpose of the utility model is to provide a kind of external pressure vessel unstability test unit, and 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 utility model 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 beneficial effect of the utility model is; The external pressure vessel unstability test unit of the utility model 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
Fig. 1 is the structure principle chart of the utility model device;
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
Be described in detail below in conjunction with the structural principle and the principle of work of accompanying drawing the utility model.
As shown in Figure 1; The utility model external pressure vessel unstability test unit 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.
The external pressure vessel unstability test unit of the utility model 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 utility model 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 utility model 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); 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, 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, comprise that also one places the pad (10) 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, comprise that also one places the O RunddichtringO (7) between blind flange (5) and the gland (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205540347U CN202393655U (en) | 2011-12-27 | 2011-12-27 | Instability experiment device of external pressure vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205540347U CN202393655U (en) | 2011-12-27 | 2011-12-27 | Instability experiment device of external pressure vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202393655U true CN202393655U (en) | 2012-08-22 |
Family
ID=46668569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205540347U Withdrawn - After Issue CN202393655U (en) | 2011-12-27 | 2011-12-27 | Instability experiment device of external pressure vessel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202393655U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564859A (en) * | 2011-12-27 | 2012-07-11 | 浙江大学 | Instability test device of external pressure vessel |
| CN108362568A (en) * | 2018-04-25 | 2018-08-03 | 西南石油大学 | A kind of novel external pressure unstability experimental provision |
-
2011
- 2011-12-27 CN CN2011205540347U patent/CN202393655U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564859A (en) * | 2011-12-27 | 2012-07-11 | 浙江大学 | Instability test device of external pressure vessel |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120822 Effective date of abandoning: 20140702 |
|
| RGAV | Abandon patent right to avoid regrant |