CN101915644A - Method for detecting safety of welding line of geomembrane by using positive pressure - Google Patents
Method for detecting safety of welding line of geomembrane by using positive pressure Download PDFInfo
- Publication number
- CN101915644A CN101915644A CN 201010237702 CN201010237702A CN101915644A CN 101915644 A CN101915644 A CN 101915644A CN 201010237702 CN201010237702 CN 201010237702 CN 201010237702 A CN201010237702 A CN 201010237702A CN 101915644 A CN101915644 A CN 101915644A
- Authority
- CN
- China
- Prior art keywords
- surveyed area
- cavity
- air pressure
- detection method
- leakproofness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to a method for detecting the airtightness of a hot-melt double-track welding line of polyethylene geomembrane. The method comprises the following steps of: (1) making the upper and lower films of a detected area form a cavity; (2) inserting a pinhead connected with an inflation device into the cavity and inflating until the air pressure in the cavity reaches 250kPa; (3) judging the change of the air pressure in the cavity within 3 to 5 minutes, if the air pressure does not drop or is no lower than 240kPa, indicating that the airtightness of the welding line of the detected area is qualified, and if the air pressure drops to lower than 240kPa, indicating that the airtightness of the welding line of the detected area is unqualified; and (4) pulling the pinhead out to exhaust air and closing a pinhole. The detection method can effectively and quickly detect the airtightness of the hot-melt double-track welding line of the polyethylene geomembrane.
Description
Technical field
The present invention relates to a kind of detection method of welding the leakproofness of film, relate in particular to a kind of detection method that is used for hot melt double track polyethylene welding geomembrane seam leakproofness.
Background technology
HDPE (high density polyethylene) film is the best impervious material that is used for seepage control projects such as refuse landfill, and most landfill yards both domestic and external all require to use the HDPE geomembrane as main impervious material.The consumption of the HDPE geo-membrane material in China every year is above 5,000 ten thousand square metres.
One of polyethylene film for earthwork welding method in process of deployment is hot melt double track welding, and this welding method is to adopt Welding plate that two edges of the two membranes up and down that overlaps are mutually carried out the double track welding.Two membranes up and down through the welding of hot melt double track will form cavity in the middle of two welding tracks.
Because seepage control project is very high to the requirement of antiseepage, therefore need a kind of can be to the effective method of check of anti-seepage effect, but the detection method of the weld seam leakproofness of antiseepage film is the difficult problem of industry always.At present, need a kind of method that can effectively detect to the leakproofness of polyethylene film for earthwork hot melt double track weld seam.
Summary of the invention
At above-mentioned demand, the invention provides a kind of detection method that is used for polyethylene film for earthwork hot melt double track weld seam leakproofness.
Technical scheme of the present invention is as follows.
The detection method of polyethylene film for earthwork hot melt double track weld seam leakproofness of the present invention may further comprise the steps:
(1) make the upper and lower two membranes of surveyed area form cavity;
(2) in described cavity, insert the air pressure that is connected with the syringe needle of charger and is inflated in the described cavity and reach 250kPa;
(3) variation of air pressure in 3-5 minute in the described cavity of judgement, if air pressure does not descend or is not less than 240kPa, then the welding leakproofness of described surveyed area is qualified; If air pressure drops to less than 240kPa, show that then the weld seam leakproofness of described surveyed area is defective;
(4) extracting described syringe needle discharges gas and pin hole is sealed.
Preferably, in described step (1), the upper layer film at the two ends of described surveyed area is cut, and upper and lower two membranes is welded together, so that make the upper and lower two membranes of described surveyed area form cavity.
Preferably, be the initial end points of next surveyed area with an end of described surveyed area, select the terminal point end points of described next surveyed area, repeating said steps (1)-(4) are to detect the leakproofness of described next surveyed area.
Preferably, in described step (2), insert described syringe needle at an end place near described cavity.
Preferably in, the length of described surveyed area is 0m-150m.
Preferably, adopt the method for welding that described pin hole is sealed.
Detection method of the present invention can detect the leakproofness of polyethylene film for earthwork hot melt double track weld seam effectively and quickly.
Description of drawings
Fig. 1 represents the synoptic diagram of the geomembrane after the hot melt double track in described step (1)-(3) welds;
Fig. 2 represents the cut-open view of the geomembrane after the hot melt double track in described step (1)-(3) welds, and arrow is wherein represented the direction that gas charges into;
Fig. 3 represents the cut-open view through the geomembrane after the hot melt double track welding of described step (4);
Wherein, 1, syringe needle; 2, tensimeter; 3, Feng Bi pin hole; 4, cavity.
Embodiment
Below in conjunction with accompanying drawing method of the present invention is further specified.
Referring to attached Fig. 1 and 2, in the zone of selecting the pre-detection leakproofness through the overlap joint zone of the polyethylene film for earthwork after the welding of hot melt double track.To cut at the upper layer film of this regional ends A, B and upper and lower two membranes be welded together, will form a cavity 4 at weld seam A, B and two weld seams like this.
Insert the syringe needle 1 that is connected with charger at the A of described cavity 4 end, open charger and in cavity 4, inflate, show that until tensimeter 2 air pressure in this cavity 4 reaches 250kPa, stop inflation, wait for 4 minutes.
Judge the variation of air pressure in 4 minutes in this cavity 4, if air pressure does not descend or is not less than 240kPa, then described A holds the weld seam leakproofness between B end qualified; If air pressure drops to less than 240kPa, show that then the weld seam leakproofness of described surveyed area is defective, need repair by welding.
Referring to accompanying drawing 3, gas is extracted and discharged to syringe needle 1, welding forms the pin hole 3 of sealing.
Detect the leakproofness in other geomembrane overlap joint zones if desired, an end points selecting above-mentioned surveyed area is the initial end points of next surveyed area, select the terminal point end points of described next surveyed area, repeating said steps is to detect the leakproofness of described next surveyed area.
Claims (6)
1. the detection method of a polyethylene film for earthwork hot melt double track weld seam leakproofness is characterized in that, may further comprise the steps:
(1) make the upper and lower two membranes of surveyed area form cavity;
(2) in described cavity, insert the air pressure that is connected with the syringe needle of charger and is inflated in the described cavity and reach 250kPa;
(3) variation of air pressure in 3-5 minute in the described cavity of judgement, if air pressure does not descend or is not less than 240kPa, then the weld seam leakproofness of described surveyed area is qualified; If air pressure drops to less than 240kPa, show that then the weld seam leakproofness of described surveyed area is defective;
(4) extracting described syringe needle discharges gas and pin hole is sealed.
2. detection method according to claim 1, it is characterized in that, in described step (1), the upper layer film at the two ends of described surveyed area is cut, and upper and lower two membranes welded together, so that make the upper and lower two membranes of described surveyed area form cavity.
3. detection method according to claim 2, it is characterized in that, end with described surveyed area is the initial end points of next surveyed area, selects the terminal point end points of described next surveyed area, and repeating said steps (1)-(4) are to detect the leakproofness of described next surveyed area.
4. detection method according to claim 1 is characterized in that, in described step (2), inserts described syringe needle at the end place near described cavity.
5. detection method according to claim 1 is characterized in that, the length of described surveyed area is 0m-150m.
6. detection method according to claim 1 is characterized in that, adopts the method for welding that described pin hole is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010237702 CN101915644A (en) | 2010-07-27 | 2010-07-27 | Method for detecting safety of welding line of geomembrane by using positive pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010237702 CN101915644A (en) | 2010-07-27 | 2010-07-27 | Method for detecting safety of welding line of geomembrane by using positive pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101915644A true CN101915644A (en) | 2010-12-15 |
Family
ID=43323206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010237702 Pending CN101915644A (en) | 2010-07-27 | 2010-07-27 | Method for detecting safety of welding line of geomembrane by using positive pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101915644A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500915A (en) * | 2016-10-31 | 2017-03-15 | 哈尔滨电机厂有限责任公司 | The air tightness testing method of airtight welding structure |
| CN108246781A (en) * | 2018-03-12 | 2018-07-06 | 深圳市为民生态技术有限公司 | A kind of smelly deodoration system of refuse landfill control |
| CN109238572A (en) * | 2018-11-12 | 2019-01-18 | 北京星航机电装备有限公司 | Coldplate weld joint air-tight detection device |
| CN111175175A (en) * | 2020-02-26 | 2020-05-19 | 德州宏沃环保工程有限公司 | Fixed connection inflation detection device for plastic film welding seams |
| CN113392476A (en) * | 2021-05-21 | 2021-09-14 | 河海大学 | Geomembrane weld joint strength nondestructive judgment and weld joint repair method |
| CN114211756A (en) * | 2021-09-28 | 2022-03-22 | 中国化学工程第十四建设有限公司 | Geomembrane covering double-rail hot melting technology process for refuse landfill |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4259152A (en) * | 1978-11-30 | 1981-03-31 | The United States Of America As Represented By The Department Of Energy | Weld failure detection |
| CN201311338Y (en) * | 2008-10-17 | 2009-09-16 | 中铁十二局集团第二工程有限公司 | Waterproof board double-welding-line inflatable detector |
-
2010
- 2010-07-27 CN CN 201010237702 patent/CN101915644A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4259152A (en) * | 1978-11-30 | 1981-03-31 | The United States Of America As Represented By The Department Of Energy | Weld failure detection |
| CN201311338Y (en) * | 2008-10-17 | 2009-09-16 | 中铁十二局集团第二工程有限公司 | Waterproof board double-welding-line inflatable detector |
Non-Patent Citations (1)
| Title |
|---|
| 《钻采工艺》 20100630 邓君富 "巴格德雷天然气处理厂工程土工膜施工工艺" 第182-185页 1-6 , 第S1期 2 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500915A (en) * | 2016-10-31 | 2017-03-15 | 哈尔滨电机厂有限责任公司 | The air tightness testing method of airtight welding structure |
| CN108246781A (en) * | 2018-03-12 | 2018-07-06 | 深圳市为民生态技术有限公司 | A kind of smelly deodoration system of refuse landfill control |
| CN109238572A (en) * | 2018-11-12 | 2019-01-18 | 北京星航机电装备有限公司 | Coldplate weld joint air-tight detection device |
| CN111175175A (en) * | 2020-02-26 | 2020-05-19 | 德州宏沃环保工程有限公司 | Fixed connection inflation detection device for plastic film welding seams |
| CN113392476A (en) * | 2021-05-21 | 2021-09-14 | 河海大学 | Geomembrane weld joint strength nondestructive judgment and weld joint repair method |
| CN113392476B (en) * | 2021-05-21 | 2022-08-19 | 河海大学 | Geomembrane weld joint strength nondestructive judgment and weld joint repair method |
| CN114211756A (en) * | 2021-09-28 | 2022-03-22 | 中国化学工程第十四建设有限公司 | Geomembrane covering double-rail hot melting technology process for refuse landfill |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101915644A (en) | Method for detecting safety of welding line of geomembrane by using positive pressure | |
| CN1979152A (en) | Double-electrode detection method and apparatus for seepage of seepage-proof layer | |
| CN211423695U (en) | Non-excavation drainage pipe slip casting prosthetic devices | |
| CN111504561A (en) | Method for detecting air tightness of lithium ion battery | |
| CN205843909U (en) | Anchor bar of waterproof plate in tunnels weld joint air-tight detector | |
| CN104614131A (en) | Underground oil and gas storage cavern airtightness test method | |
| CN204064570U (en) | A kind of air tightness of pipe fitting checkout equipment | |
| CN103802309B (en) | Refuse landfill HDPE film welding method | |
| CN111331849A (en) | Composite HDPE (high-density polyethylene) film prevention and control system for emergency facility base and construction method | |
| CN201716160U (en) | Mechanism using negative method to detect weld seam in geomemberane | |
| CN204882003U (en) | Gas drainage drilling leakproofness detection device | |
| JP2008107338A (en) | Inspection method of sealing sheet joint | |
| CN204903112U (en) | Portable plastic check well leakproofness detection device | |
| CN1595089A (en) | Pipe joint rapid leak hunting method | |
| CN211121781U (en) | Garbage landfill impermeable layer damage leakage detection device capable of being automatically marked | |
| CN202430748U (en) | Geomembrane welded structure | |
| CN104278983A (en) | Coupling device for sound-wave all-around testing dry hole probe | |
| CN104977143A (en) | Gas drainage drilling tightness detection device | |
| CN211825537U (en) | Fixed connection inflation detection device for plastic film welding seams | |
| CN107806970A (en) | A kind of battery seal detection device and detection method | |
| CN113819335A (en) | Pipeline repairing device and pipeline repairing method | |
| CN103831973A (en) | Garbage landfill site HDPE geomembrane welding method | |
| CN206458953U (en) | Duct closing type device | |
| JP3910256B2 (en) | Defect inspection method for water shielding sheet joints | |
| CN105910776A (en) | Indoor testing model for detecting sealing effect of flexible material on high-pressure air in rock cave |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20101215 |