CN102679168A - Method for searching for leakage point of steel-wrapped-steel direct buried steam pipeline - Google Patents
Method for searching for leakage point of steel-wrapped-steel direct buried steam pipeline Download PDFInfo
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- CN102679168A CN102679168A CN2012101901805A CN201210190180A CN102679168A CN 102679168 A CN102679168 A CN 102679168A CN 2012101901805 A CN2012101901805 A CN 2012101901805A CN 201210190180 A CN201210190180 A CN 201210190180A CN 102679168 A CN102679168 A CN 102679168A
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Abstract
The invention discloses a method for searching for a leakage point of a steel-wrapped-steel direct buried steam pipeline. The method comprises the following steps: drilling temperature-sensing holes at 5-10m intervals above the steel-wrapped-steel direct buried steam pipeline, wherein the bottoms of the temperature-sensing holes are 0.1-0.2m away from the steam pipeline; measuring the temperature at the bottoms of the temperature-sensing holes by using a far infrared temperature measurer; and confirming the position of the leakage point of the steam pipeline. According to the method, the specific position of the leakage point of the steam pipeline is quickly and accurately confirmed and the time for emergency maintenance is gained. The method has the characteristics of convenience, high speed and accuracy.
Description
Technical field
The invention belongs to directly buried type steam line technical field, what relate generally to is a kind of method of searching the direct buried steam pipe with steel jacket leakage point.
Background technique
As shown in Figure 1: existing direct buried steam pipe with steel jacket is embedded in ground and works below 1; The working steel tube 4 of direct buried steam pipe with steel jacket is by external protective steel tube 2 protections; Between working steel tube 4 outer walls and external protective steel tube 2, be provided with thermal insulation layer 3, working steel tube 4 is supported by supporting element 5.Because getting wet when construction easily, thermal insulation layer 3 makes moist; Will produce moisture in the work,, whenever be spaced a distance for the moisture in the thermal insulation layer 3 is in time discharged; A humidity discharging pipe 6 (as shown in Figure 2) just need be set; Humidity discharging pipe 6 is guided to ground more than 1 from the thermal insulation layer space, and one section (AB section) between every adjacent two humidity discharging pipes is called the packing section, and each packing section two ends is provided with packing plate 7.The humidity discharging pipe also has and in time finds the function that working pipe is revealed except the function of humidity discharging gas.For example, if reveal working pipe certain of packing section AB section, humidity discharging pipe 6 will spray a large amount of steam, and the steam flow of its ejection is obviously much bigger than normal humidity discharging amount.
Because the packing segment length of direct buried steam pipe with steel jacket is short different, long have hundreds of rice, and short has tens meters.When finding that certain packing section working pipe is revealed, just need repairing in time, need to confirm the particular location of leak point before the repairing.Present emergency repair method has two kinds: a kind of is that the packing segment pipe of revealing is all changed, but the cost of this emergency repair method is higher, and the repairing workload is big, and the repairing time is long.Another kind is to be only applicable to heavy caliber working pipe (greater than DN500), can crawl into the people in the working pipe.In the humidity discharging pipe, inflate body through adopting, make the thermal insulation layer space of packing section that pressurized air arranged, the people gets into and listens leak point sound in the working pipe; Confirm to keep in repair behind the position, leak point; Generally be with the external protective steel tube incision of leak point, weld leak source, and then mend external protective steel tube.The shortcoming of this method; The one, be not suitable for small-bore pipeline, the 2nd, wait by the time the working pipe temperature can be checked the leak point when dropping to the temperature that the people can enter, because the temperature-fall period of working pipe often needs the long time; Sometimes even reach first quarter moon, have a strong impact on the conveying of steam.How to search position, direct buried steam pipe with steel jacket leak point, remain a world-famous puzzle that needs to be resolved hurrily at present.
Summary of the invention
The objective of the invention is to propose a kind of method of searching the direct buried steam pipe with steel jacket leakage point.Adopt this method can quick and precisely find the particular location of steam line leakage point,, have convenient, fast and accurate characteristics for repairing gains time.
The present invention realizes the technological scheme that above-mentioned purpose is taked: a temperature measuring hole is made a call to for 5 meters～10 meters in every interval above direct buried steam pipe with steel jacket; The bottom of temperature measuring hole is apart from steam line 0.1-0.2 rice; Through the temperature of far infrared thermometric instrument measurement temperature measuring hole bottom, confirm the position of steam line leakage point.
The aperture of temperature measuring hole according to the invention is a 0.05-0.15 rice.
No matter the present invention is superheated vapor or saturated vapour according to thermodynamic (al) principle, and steam is superheated vapor when working pipe is gone out in the leak point, and through outside after the pillar cooling, gradually become saturated vapour.Because the thermal insulation layer space is through humidity discharging pipe and atmosphere, so the saturated-steam temperature in the thermal insulation layer space is 100 ℃.Because near the leak point be superheated vapor, so near the temperature the leak point is greater than 100 ℃.The present invention makes a call to a temperature measuring hole for 5 meters～10 meters through every interval above direct buried steam pipe with steel jacket; According to the temperature measuring hole bottom temp; Can confirm roughly that the working pipe leak point is in 5 meters～10 meters scope; Earthing on this segment pipe is excavated, survey the temperature on outer pillar surface again with the far infrared thermometric instrument, the position of temperature peak promptly is the position of working pipe leak point.Adopt this method can quick and precisely find the particular location of steam line leakage point,, have convenient, fast and accurate characteristics for repairing gains time.
Description of drawings
Fig. 1, Fig. 2 are the structural representations of existing direct buried steam pipe with steel jacket, and wherein Fig. 1 is the cross-sectional figure of Fig. 2.
Fig. 3 is a structural representation of the present invention.
Fig. 4 is a temperature variation schematic representation of the present invention.
Among the figure: 1, ground, 2, external protective steel tube, 3, thermal insulation layer, 4, working steel tube; 5, supporting element, 6, the humidity discharging pipe, 7, the packing plate, 8, the far infrared thermometric instrument; 9, temperature measuring hole, 10, the working pipe leak point, 11, near the temperature variation curve the working pipe leak point, T, y coordinate.
Embodiment
In conjunction with accompanying drawing, it is following to provide embodiments of the invention:
As shown in Figure 3: the described method of searching the direct buried steam pipe with steel jacket leakage point of present embodiment is to imbed above the direct buried steam pipe with steel jacket of ground below 1 existing; A temperature measuring hole 9 is made a call to for 5 meters～10 meters in every interval; The aperture is generally 0.05-0.15 rice; Apart from the external protective steel tube 0.1-0.2 rice of steam line, confirm the approximate location of steam line leakage point through the temperature of far infrared thermometric instrument 8 measurement temperature measuring holes 9 bottoms at the bottom of the hole of temperature measuring hole 9.As shown in Figure 4: y coordinate T representes temperature; Near near the working pipe leak point the temperature variation curve 11 expression working pipe leakage points temperature; Working pipe leak point 10 and near temperature thereof are greater than 100 ℃, and the external protective steel tube hull-skin temperature at 10 places, working pipe leak point is the highest.The vapor (steam) temperature of working pipe is high more, and the outer pillar surface temperature of leakage point is just high more.The temperature peak of outer pillar 2 is exactly the leakage point of working pipe.Temperature according to 8 temperature measuring hole bottoms of far infrared thermometric instrument; Confirm that roughly the working pipe leak point is in 5 meters～10 meters scope; Earthing on this segment pipe is excavated, survey the temperature on outer pillar surface again with the far infrared thermometric instrument, up to searching out the leak point particular location.Temperature is the highest is the position, leak point.
Claims (2)
1. method of searching the direct buried steam pipe with steel jacket leakage point; It is characterized in that: a temperature measuring hole is made a call to for 5 meters～10 meters in every interval above direct buried steam pipe with steel jacket; The position of steam line leakage point is confirmed apart from steam line 0.1-0.2 rice in the bottom of temperature measuring hole through the temperature of far infrared thermometric instrument (8) measurement temperature measuring hole (9) bottom.
2. method of searching the direct buried steam pipe with steel jacket leakage point according to claim 1 is characterized in that: the aperture of said temperature measuring hole (9) is a 0.05-0.15 rice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101901805A CN102679168A (en) | 2012-06-11 | 2012-06-11 | Method for searching for leakage point of steel-wrapped-steel direct buried steam pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101901805A CN102679168A (en) | 2012-06-11 | 2012-06-11 | Method for searching for leakage point of steel-wrapped-steel direct buried steam pipeline |
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| CN102679168A true CN102679168A (en) | 2012-09-19 |
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| CN2012101901805A Pending CN102679168A (en) | 2012-06-11 | 2012-06-11 | Method for searching for leakage point of steel-wrapped-steel direct buried steam pipeline |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698010A (en) * | 2014-11-25 | 2016-06-22 | 烟台地源空调科技有限公司 | Winter pipe network field construction leakage check method |
| CN106090625A (en) * | 2016-08-23 | 2016-11-09 | 苏州工业园区蓝天燃气热电有限公司 | A kind of buried jet chimney leakage inspection method |
| CN107388045A (en) * | 2017-08-23 | 2017-11-24 | 上海山南勘测设计有限公司 | A kind of device and detection method for underground heat hydraulic piping detection |
| CN111022833A (en) * | 2019-12-10 | 2020-04-17 | 张声振 | Direct-buried heat-insulation steam pipe with pipeline leakage monitoring function |
| CN113639207A (en) * | 2021-10-13 | 2021-11-12 | 海门市晨光照明电器有限公司 | Buried heat-insulating pipeline convenient to detect and detection method thereof |
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| CN2434517Y (en) * | 2000-08-18 | 2001-06-13 | 陈述增 | Straightly buried leakage checking casing pipe compensator |
| CN2550621Y (en) * | 2002-07-18 | 2003-05-14 | 上海益能电力工程有限公司 | Directly buried leakage detecting type corrugated pipe compensation joint |
| CN2611722Y (en) * | 2002-12-18 | 2004-04-14 | 齐克先 | Multi-shielded vacuum composite corrosion-proof thermal insulating and directly buryed steam pipe |
| CN102086972A (en) * | 2010-11-17 | 2011-06-08 | 广州精测管线技术有限公司 | Method for detecting leaking point position of buried pipeline by gas |
| KR20120032890A (en) * | 2010-09-29 | 2012-04-06 | 서울대학교산학협력단 | Method for predicting boil-off gas production |
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2012
- 2012-06-11 CN CN2012101901805A patent/CN102679168A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2434517Y (en) * | 2000-08-18 | 2001-06-13 | 陈述增 | Straightly buried leakage checking casing pipe compensator |
| CN2550621Y (en) * | 2002-07-18 | 2003-05-14 | 上海益能电力工程有限公司 | Directly buried leakage detecting type corrugated pipe compensation joint |
| CN2611722Y (en) * | 2002-12-18 | 2004-04-14 | 齐克先 | Multi-shielded vacuum composite corrosion-proof thermal insulating and directly buryed steam pipe |
| KR20120032890A (en) * | 2010-09-29 | 2012-04-06 | 서울대학교산학협력단 | Method for predicting boil-off gas production |
| CN102086972A (en) * | 2010-11-17 | 2011-06-08 | 广州精测管线技术有限公司 | Method for detecting leaking point position of buried pipeline by gas |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698010A (en) * | 2014-11-25 | 2016-06-22 | 烟台地源空调科技有限公司 | Winter pipe network field construction leakage check method |
| CN106090625A (en) * | 2016-08-23 | 2016-11-09 | 苏州工业园区蓝天燃气热电有限公司 | A kind of buried jet chimney leakage inspection method |
| CN107388045A (en) * | 2017-08-23 | 2017-11-24 | 上海山南勘测设计有限公司 | A kind of device and detection method for underground heat hydraulic piping detection |
| CN111022833A (en) * | 2019-12-10 | 2020-04-17 | 张声振 | Direct-buried heat-insulation steam pipe with pipeline leakage monitoring function |
| CN113639207A (en) * | 2021-10-13 | 2021-11-12 | 海门市晨光照明电器有限公司 | Buried heat-insulating pipeline convenient to detect and detection method thereof |
| CN113639207B (en) * | 2021-10-13 | 2021-12-21 | 海门市晨光照明电器有限公司 | Buried heat-insulating pipeline convenient to detect and detection method thereof |
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Application publication date: 20120919 |