CN202599626U - Bellows interlayer monitoring and alarm device - Google Patents
Bellows interlayer monitoring and alarm device Download PDFInfo
- Publication number
- CN202599626U CN202599626U CN 201120558010 CN201120558010U CN202599626U CN 202599626 U CN202599626 U CN 202599626U CN 201120558010 CN201120558010 CN 201120558010 CN 201120558010 U CN201120558010 U CN 201120558010U CN 202599626 U CN202599626 U CN 202599626U
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- interlayer
- bellows
- corrugated tube
- pressure
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Abstract
The utility model, which belongs to the bellows expansion joint compensation technology field of a duct system, brings forward a bellows interlayer monitoring and alarm device that comprises a detection tube (7). The lower end of the detection tube (7) is connected with a straight pipe section of a two-layer bellows (6); and the upper end of the detection tube (7) is connected with a four-way joint (2). The upper-end interface of the four-way joint (2) is communicated with a pressure gauge (3) for detecting interlamination pressures of the two-layer bellows; an interface at one side of the four-way joint (2) is connected with an air vent valve (1) that is used for venting interlayer air of the two-layer bellows during the temperature rising process of an expansion joint; and an interface at the other side of the four-way joint (2) is connected with an inlet valve (4) that is used for providing pressures for the interlayer of the two-layer bellows; and the inlet valve (4) is connected with a low-pressure nitrogen pipeline (5) that is used for providing air suction. According to the utility model, maneuverability, security and reliability of the alarm device are improved; and popularization and application of the monitoring and alarm device in the petrochemical engineering field can be realized conveniently.
Description
Technical field
The utility model belongs to piping system bellows expansion joint compensation technique field, and particularly a kind of corrugated tube interlayer monitoring alarm judges through the variation of corrugated tube interlayer pressure whether corrugated tube leaks.
Background technology
Expansion joint leakage monitoring warning device be utilize corrugated tube two-layer between the variation of pressure judge whether corrugated tube produces leakage.Corrugated tube is that the principle by " individual layer pressure-bearing; double layer design " designs and makes; Each layer that is corrugated tube can both bear design pressure and action of temperature separately; When one deck of corrugated tube took place to leak, expansion joint still can safe operation, so just can avoid causing device to stop in emergency because of corrugated tube leaks.Therefore monitoring alarm has obtained widespread use in the bellows expansion joint of inflammable, the explosive and poisonous medium of industries such as chemical industry, oil refining.
In practical applications, adopt the corrugated tube interlayer mode of vacuumizing to detect corrugated tube usually and whether leak, as shown in Figure 1.Its principle of work is: when expansion joint dispatches from the factory, make the corrugated tube interlayer keep certain vacuum (negative pressure), in operational process, when the corrugated tube interlayer pressure equals zero, the outer leakage of corrugated tube is described; When the corrugated tube interlayer pressure equals on-stream pressure, explain that the corrugated tube internal layer leaks.Because inevitably there is tiny leakage in pick-up unit; After expansion joint moves a period of time; Detect gauge pressure and will be designated as zero; At this moment need vacuumize once more the corrugated tube interlayer and confirm,, can judge that then the corrugated tube skin leaks if tensimeter is designated as zero (perhaps can't vacuumize) very soon.This detection mode is very high to the sealing requirements of pick-up unit, when the detection gauge pressure is designated as zero, need vacuumizes once more and confirm, execute-in-place is inconvenience very.
The utility model content
For solving the problems of the technologies described above, the purpose of the utility model is to propose a kind of corrugated tube interlayer monitoring alarm, makes its operability that can improve corrugated tube interlayer monitoring alarm, security and reliability, so that in petrochemical industry project, apply.
The utility model adopts following technical scheme for accomplishing the foregoing invention task:
A kind of corrugated tube interlayer monitoring alarm, corrugated tube interlayer monitoring alarm has detector tube; The lower end of said detector tube is connected the straight length of double-ply bellows, is connected with the interlayer of double-ply bellows straight length; The upper end of said detector tube is connected with four-way connection; The last end interface of said four-way connection be connected in order to the tensimeter that detects double-ply bellows layer frame pressure; Side interface connection at said four-way connection is used at the vent valve of expansion joint temperature-rise period with the interlayer gas discharge of double-ply bellows; Opposite side interface at said four-way connection provides the gas admittance valve of pressure to link to each other with the interlayer that is used to double-ply bellows; Described gas admittance valve with link to each other in order to the low-pressure nitrogen pipeline that air inlet is provided.
A kind of corrugated tube interlayer monitoring alarm that the utility model proposes utilizes the pressure of the low-pressure nitrogen pipeline of being convenient in the petrochemical equipment to take that corrugated tube is detected, and has improved the operability of warning device; Utilize vent valve and gas admittance valve to make the corrugated tube interlayer be in slight positive pressure state all the time, avoid taking place the superpressure phenomenon, thereby improved the security and the reliability of corrugated tube, be convenient to monitoring alarm and in petrochemical industry project, apply.
Description of drawings
Fig. 1 is the structural representation of corrugated tube interlayer monitoring alarm in the prior art.
Fig. 2 is the structural representation of the utility model.
Among the figure: 1. vent valve, 2. four-way connection, 3. tensimeter, 4. gas admittance valve, 5. low-pressure nitrogen pipeline, 6. corrugated tube, 7. detector tube.
Embodiment
The utility model is explained that still, the utility model is not limited to these embodiment in conjunction with accompanying drawing and specific embodiment.
As shown in Figure 2, a kind of corrugated tube interlayer monitoring alarm, corrugated tube interlayer monitoring alarm has detector tube 7; The lower end of said detector tube 7 is connected the straight length of double-ply bellows 6, is connected with the interlayer of double-ply bellows 6 straight lengths; The upper end of said detector tube 7 is connected with four-way connection 2; The last end interface of said four-way connection 2 be connected in order to the tensimeter 3 that detects double-ply bellows layer frame pressure; Side interface connection at said four-way connection 2 is used at the vent valve 1 of expansion joint temperature-rise period with the interlayer gas discharge of double-ply bellows; Opposite side interface at said four-way connection provides the gas admittance valve 4 of pressure to link to each other with the interlayer that is used to double-ply bellows; Described gas admittance valve 4 with link to each other in order to the low-pressure nitrogen pipeline 5 that air inlet is provided; The pressure operated by rotary motion of low-pressure nitrogen pipeline 5 is about 50kPa (gauge pressure).When expansion joint dispatched from the factory, vent valve 1 was in open mode, and gas admittance valve 4 is in closed condition.In the expansion joint temperature-rise period, the gas of corrugated tube interlayer expands and discharges through vent valve 1, to avoid the corrugated tube superpressure.When treating that medium temperature reaches normal running temperature, vent valve 1 is closed, and gas admittance valve 4 is opened, when the corrugated tube interlayer is pressurized to predefined pressure, gas admittance valve 4 cuts out, in order to avoid damage corrugated tube because of nitrogen pipeline 5 superpressures.In operational process, if the tensimeter indicated pressure equals pipe operations pressure, show that then the corrugated tube internal layer leaks, because gas admittance valve 4 is in closed condition, can avoid the medium of nitrogen pipeline to get into piping system.If the tensimeter indicated pressure is zero, then gas admittance valve 4 is opened and is made the corrugated tube interlayer be pressurized to predefined pressure, and observe pressure and change, if pressure at short notice (such as 30 minutes) be reduced to zero, show that then the corrugated tube skin leaks.
Claims (1)
1. corrugated tube interlayer monitoring alarm, corrugated tube interlayer monitoring alarm has detector tube (7); The lower end of said detector tube (7) is connected the straight length of double-ply bellows (6), is connected with the interlayer of double-ply bellows straight length (6); It is characterized in that: the upper end of said detector tube (7) is connected with four-way connection (2); The last end interface of said four-way connection (2) be connected in order to the tensimeter (3) that detects double-ply bellows layer frame pressure; Side interface connection at said four-way connection (2) is used at the vent valve (1) of expansion joint temperature-rise period with the interlayer gas discharge of double-ply bellows; Opposite side interface at said four-way connection (2) provides the gas admittance valve (4) of pressure to link to each other with the interlayer that is used to double-ply bellows; Described gas admittance valve (4) with link to each other in order to the low-pressure nitrogen pipeline (5) that air inlet is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120558010 CN202599626U (en) | 2011-12-28 | 2011-12-28 | Bellows interlayer monitoring and alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120558010 CN202599626U (en) | 2011-12-28 | 2011-12-28 | Bellows interlayer monitoring and alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202599626U true CN202599626U (en) | 2012-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120558010 Expired - Lifetime CN202599626U (en) | 2011-12-28 | 2011-12-28 | Bellows interlayer monitoring and alarm device |
Country Status (1)
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| CN (1) | CN202599626U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471789A (en) * | 2013-09-11 | 2013-12-25 | 南京晨光东螺波纹管有限公司 | Device for monitoring pressure between two layers of corrugated pipes or two layers of container shells |
| CN104344148A (en) * | 2014-09-12 | 2015-02-11 | 徐东海 | Water pipe with high temperature alert function |
| CN105864554A (en) * | 2016-05-18 | 2016-08-17 | 洛阳双瑞特种装备有限公司 | Pipeline-used expansion joint with second-level pressurization structure |
| CN106287237A (en) * | 2016-08-05 | 2017-01-04 | 洛阳双瑞特种装备有限公司 | The quantitative testing device revealed for external pressure expansion joint |
| CN108534224A (en) * | 2018-05-02 | 2018-09-14 | 冶金部东北地质辽阳波纹管厂 | A kind of metal corrugation compensator monitoring early-warning device and its monitoring method |
| CN108548938A (en) * | 2018-05-06 | 2018-09-18 | 朱海军 | The electrical mechanism for monitoring of whirl compensator pipe flow speed |
| CN110345330A (en) * | 2019-07-19 | 2019-10-18 | 福建福清核电有限公司 | A kind of online leakage monitor of double-level-metal expansion joint and method |
-
2011
- 2011-12-28 CN CN 201120558010 patent/CN202599626U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471789A (en) * | 2013-09-11 | 2013-12-25 | 南京晨光东螺波纹管有限公司 | Device for monitoring pressure between two layers of corrugated pipes or two layers of container shells |
| CN104344148A (en) * | 2014-09-12 | 2015-02-11 | 徐东海 | Water pipe with high temperature alert function |
| CN105864554A (en) * | 2016-05-18 | 2016-08-17 | 洛阳双瑞特种装备有限公司 | Pipeline-used expansion joint with second-level pressurization structure |
| CN106287237A (en) * | 2016-08-05 | 2017-01-04 | 洛阳双瑞特种装备有限公司 | The quantitative testing device revealed for external pressure expansion joint |
| CN106287237B (en) * | 2016-08-05 | 2018-07-06 | 洛阳双瑞特种装备有限公司 | For the quantitative testing device of external pressure expansion joint leakage |
| CN108534224A (en) * | 2018-05-02 | 2018-09-14 | 冶金部东北地质辽阳波纹管厂 | A kind of metal corrugation compensator monitoring early-warning device and its monitoring method |
| CN108548938A (en) * | 2018-05-06 | 2018-09-18 | 朱海军 | The electrical mechanism for monitoring of whirl compensator pipe flow speed |
| CN110345330A (en) * | 2019-07-19 | 2019-10-18 | 福建福清核电有限公司 | A kind of online leakage monitor of double-level-metal expansion joint and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |
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| CX01 | Expiry of patent term |