CN103323189B - A kind of ship pipeline negative pressure leakage detection cover - Google Patents
A kind of ship pipeline negative pressure leakage detection cover Download PDFInfo
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- CN103323189B CN103323189B CN201310223280.8A CN201310223280A CN103323189B CN 103323189 B CN103323189 B CN 103323189B CN 201310223280 A CN201310223280 A CN 201310223280A CN 103323189 B CN103323189 B CN 103323189B
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- leakage detection
- negative pressure
- detection cover
- pipeline
- pressure leakage
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Abstract
A kind of ship pipeline negative pressure leakage detection cover, described negative pressure leakage detection cover is rectangle bag shaped structure, and negative pressure leakage detection cover comprises film, splenial bone chain, powerful clay, vacuum seal silicone grease, elastic webbing, magnet.The tight coated measured piece of negative pressure leakage detection cover, splenial bone chain is utilized to seal thermoplastic polyurethane film, outer secondary is with pressure sensitive adhesive (powerful clay) and magnet closed conduit sealing surface, inner utilization elastic webbing Clad pipe seals, when detected device occurs that negative pressure is revealed, leakage detection cover can be shunk rapidly, is close to measured piece surface, by reading the pressure difference of digital vacuum table, determine leak degree.The present invention is a kind of on-line measuring device, and this device can check fast, determine leak site, installs, fast easy to detect, easy to use, and instruction obviously, is specially adapted to boats and ships heap cabin, steam turbine, the detection of refrigerating plant and extract system and maintenance.
Description
Technical field
The present invention relates to a kind of vacuum detecting utility appliance, particularly a kind of ship pipeline negative pressure leakage detection cover of a kind of vacuum for equipment such as boats and ships (negative pressure) system.
Background technology
Along with the high development of modern science and technology, the vacuum tank used in industry, business, science and research institution, systems grow are large.Because manufacturing process can not be flawless, seal point is thousands of, and along with the aging of components and parts loosens in the middle of using, packoff unavoidably exists the possibility of leakage.In actual production and life, every part requiring sealing, it is impossible for definitely " not leaking ", we only refer to that actual leakage rate is very small at said at ordinary times " not leaking " or " No leakage ", and people out or not do not affect certain request for utilization with instrument detection, people specify to be less than the leakage of a certain order of magnitude for " not leaking ".
Vacuum (negative pressure) system is heap cabin, steam turbine, refrigerating plant and extract system important component part, once break down, generally can have a strong impact on the normal operation of ship power, refrigeration system.The main generator of boats and ships, the vacuum system of main frame is in vacuum process of establishing, the situation that frequent generation vacuum cannot be set up, usually be all due to vacuum pump, flange, the hermetic unit of the equipment such as pipeline occurs that breakage causes leaking, owing to being negative pressure leakage, system equipment, pipeline external does not have obvious presentation, cannot Timeliness coverage, boats and ships do not have special checkout facility at present, can only by the switch of valve, the methods such as the replacement of redundancy pipeline valve search pipeline section and the scope at leak source place, definite location is abnormal difficult, sometimes have to carry out " covering " maintenance leakage point by the method changing sealings all in certain limit, cause servicing time long, accuracy is not high, waste time and energy, also maneuverability can be affected in navigation process.The common method that current industrial circle detects vacuum system leakage has: freon detection, helium Mass Spectrometer Method, candle detect, ultrasound examination.The research of hunting leak online about vacuum system is both at home and abroad mainly in the following areas: (1) ultrasound examination, ultrasonic technology detects vacuum system and leaks, have and detect the features such as simple, accurate, cost is low, but need to use supersonic reflectoscope along closely (within the 15cm) detection of the suspicious leakage position of unit under test, and ultrasound examination requires that leak source must send the ultrasound wave of some strength, once leak source does not meet the demands, or background ultrasonic hash is excessive, just leak source cannot be measured; (2) candle detects, and candle method is the most original method, and in some urgent or simple occasion still in use, but candle method exists potential safety hazard.Thus send out vacuum system for the master of boats and ships and study the strong vacuum leak hunting technology of a kind of applicability, there is very important economic benefit.
Summary of the invention
The object of the invention is to, overcome the deficiencies in the prior art part, there is provided a kind of for detecting the device that vacuum pipe leaks, principle of the present invention utilizes the tight coated unit under test of thermoplastic polyurethane film, make it effectively isolated with atmosphere outside, thus set up one by coated cover inner surface and the space that formed by lateral body outside surface, once measured body occurs leaking hole, then this space is by leaking hole and vacuum system UNICOM, by detecting the pressure change in this space, can know that leakage situation appears in testee.
For achieving the above object, the present invention realizes by the following technical solutions:
A kind of ship pipeline negative pressure leakage detection cover, described negative pressure leakage detection cover is rectangle bag shaped structure, specifically comprises digital vacuum table, film, splenial bone chain, powerful clay, elastic webbing, magnet, described film is rectangle bag shaped structure, be divided into, lower two-layer, the negative pressure leakage detection cover of described rectangle bag shaped structure is connected with valve and seal for pipe joints, flange is equipped with at described valve two ends, flange is connected with pipeline, described pipeline surrounding arranges bulge-structure, described valve, flange and duct wrap are in film, wherein the double-layer films of negative pressure leakage detection cover upper end seals completely, and be connected with digital vacuum table, described leakage detection cover lower end is provided with splenial bone chain, splenial bone chain is utilized to seal, two ends, described leakage detection cover left and right utilize its double-layer films to pass through elastic webbing, powerful clay, magnet and splenial bone chain and pipeline seal.
Further, the double-layer films held about described negative pressure leakage detection cover and the sealing of pipeline are achieved in the following ways, inside leakage detection cover, first two ends, described leakage detection cover left and right are sealed pipeline by elastic webbing, the projection on pipeline and splenial bone chain fitted seal is utilized outside pipeline, then the pipeline surrounding that splenial bone chain is coated is coated powerful clay and is carried out three sealings, finally utilizes magnet to be mutually adsorbed on film and seals the pipeline of film coated.
Further, described film is thermoplastic polyurethane film, its toughness and intensity high, not easily punctured by metal burr and sharp shaped material; The process of corona treatment method is adopted to described film surface, improves the bounding force of adhesive and film.
Further, described powerful clay is pressure sensitive adhesive.
Further, described digital vacuum table, by the pressure difference before display screen read test and after test, realizes on-line checkingi.
Compared with prior art, the present invention has following useful effect:
(1) propose to adopt soft clad type leakage detection cover technology for detection pipeline vacuum leak, visual result, has interim leak stopping effect simultaneously.
(2) leakage detection cover is by selecting suitable splenial bone chain, polyurethane seal membrane material, magnet and elastic webbing, and make tightness reach designing requirement, diaphragm seal is cracky not, solves sealing problem.
(3) two ends, rectangle bag shaped structure negative pressure leakage detection cover left and right of the present invention adopt three sealings, outside utilizes coordinating of pipeline and splenial bone chain, pipe ends utilizes magnet and the sealing of powerful clay, and inner side utilizes the sealing function of elastic webbing and magnet, adds sealing.
Accompanying drawing explanation
Fig. 1 is the structural representation of negative pressure leakage detection cover of the present invention;
1. digital vacuum table, 2. conduit, 3. thermoplastic polyurethane film (TPU), 4. valve, 5. powerful clay, 6. splenial bone chain, 8. elastic webbing, 9. magnet
Embodiment
Elaborate to embodiments of the invention below in conjunction with accompanying drawing, the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
A kind of ship pipeline negative pressure leakage detection cover, structure is rectangle bag shaped structure.As shown in Figure 1, the leakage detection cover of rectangle bag shaped structure is mainly used in the detection of valve type, flange, vibroshock class and round pie flange, can be determined the size of the leakage detection cover of rectangle bag shaped structure by the size measuring part on boats and ships.
Rectangle bag shaped structure leakage detection cover comprises digital vacuum table 1, thermoplastic polyurethane film (TPU) 3, powerful clay 5, splenial bone chain 6, elastic webbing 8, magnet 9, as shown in Figure 1, the thermoplastic polyurethane film 3 of rectangle bag shaped structure leakage detection cover is divided into two-layer, the upper end of the leakage detection cover double-layer films 3 of rectangle bag shaped structure seals completely, lower end is installed splenial bone chain 6 and is sealed, the structure of splenial bone chain 6 is protruding and spill is interlocked, wherein the projection of splenial bone chain 6 coordinates with another spill and realizes sealing, on the upside of two ends, rectangle bag shaped structure negative pressure leakage detection cover left and right, 3/4ths length seal completely, all the other 1/4th length install splenial bone chain 6 structure, splenial bone chain 6 is utilized to seal.Pipeline surrounding design bulge-structure on flange, the protrusions match assembling of splenial bone chain 6 and pipeline, all the other utilize bilevel splenial bone chain 6 to seal.In inside, two ends 3/4ths, rectangle bag shaped structure left and right, length seals completely, thin film 3 is increased in the inside of outer membrane 3, utilize at 3/4ths length places elastic webbing 8 through inner side film 3, make round and elastic band 8, two ends remainder installs splenial bone chain 6.
When the flange being provided with pipeline is detected, open the splenial bone chain 6 of lower end, make the two separate up and down of film 3, open the splenial bone chain 6 at two ends, left and right simultaneously, pipeline and flange are coated in film 3, the upper end of pipeline is near the upper end of film 3 opening, pipeline is respectively by the circular elastic webbing 8 in two ends, left and right, the elastic reaction of elastic webbing 8 is utilized to seal pipeline, projection on pipeline and splenial bone chain 6 fitted seal is utilized in two ends, left and right outermost, again pipeline surrounding coated for splenial bone chain 6 is coated powerful clay 5 and carry out three sealings, all the other utilize the splenial bone chain 6 on double-layer films 3 to seal, the mutual absorption of magnet 9 pipeline coated to film 3 is utilized to seal at the two ends of film 3 and elastic webbing 8 Clad pipe.Rectangle bag shaped structure negative pressure leakage detection cover upper end seals completely and is connected with digital vacuum table 1, utilize the rectangle bag shaped structure negative pressure leakage detection cover tightly unit under test such as the coated valve as vacuum system, flange, thus set up the space be made up of coated cover inner surface and measured body outside surface, once measured body occurs leaking hole, then this space is by leaking hole and vacuum system UNICOM, by detecting the pressure change in this space, can know that the degree of leaking appears in measured body.
Copy the vacuum pipe on boats and ships to simulate and set up an empirical model, utilize the present invention to detect measured piece, testing coated speed is 3.5 minutes, when negative pressure leakage appears in device, and leakage detection cover can be shunk rapidly, and be close to unit under test surface, result is obvious.Analyze experimental result: (1) leakage detection cover seal leakage amount is less than 6sccm/m, these data illustrate that the covered effect of film is fine; (2) compared for multiple leakage detection cover material, toughness and the tensile strength of discovery thermoplastic polyurethane film are better, and reliability is higher, is not easily punctured by sharp things such as metal burrs; (3) can people's complete operation, operation easier is low, and the deadline is short, and result easily judges; (4) result instruction obviously, and because leakage detection cover sealing is very excellent, once valve member leaks, leakage detection cover is obviously close to the surface of measured piece.
The present invention is a kind of Portable negative pressure pick-up unit, by utilizing the pressure difference of the coated reading closed system of thermoplastic polyurethane film, thus determine whether to leak and leakiness, be specially adapted to pile cabin, steam turbine, refrigeration dress and the detection of extract system and maintenance, there is good effect.
Claims (3)
1. a ship pipeline negative pressure leakage detection cover, described negative pressure leakage detection cover is rectangle bag shaped structure, specifically comprises digital vacuum table (1), film (3), splenial bone chain (6), powerful clay (5), elastic webbing (8) and magnet (9), it is characterized in that, described film (3) is rectangle bag shaped structure, be divided into, lower two-layer, the negative pressure leakage detection cover of described rectangle bag shaped structure is connected with valve (4) and seal for pipe joints, flange is equipped with at described valve (4) two ends, flange is connected with pipeline, described pipeline surrounding arranges bulge-structure, described valve, flange and duct wrap are in film, wherein the double-layer films (3) of negative pressure leakage detection cover upper end seals completely, and be connected with digital vacuum table (1), described negative pressure leakage detection cover lower end is provided with splenial bone chain (6), described splenial bone chain (6) is protruding and that spill is staggered structure, the projection of one of them splenial bone chain coordinates with spill and realizes sealing, two ends, described negative pressure leakage detection cover left and right utilize its double-layer films (3) by elastic webbing (8), powerful clay (5), magnet (9) and splenial bone chain (6) seal with pipeline, described film (3) is thermoplastic polyurethane film, described powerful clay (5) is pressure sensitive adhesive.
2. ship pipeline negative pressure leakage detection cover according to claim 1, it is characterized in that, the double-layer films (3) at two ends, described negative pressure leakage detection cover left and right and the sealing of pipeline are achieved in the following ways, inside negative pressure leakage detection cover, first two ends, described negative pressure leakage detection cover left and right are sealed pipeline by elastic webbing (8), the projection on pipeline and splenial bone chain (6) fitted seal is utilized outside pipeline, then the pipeline surrounding that splenial bone chain (6) is coated is coated powerful clay (5) and is carried out three sealings, finally utilize magnet (9) to be mutually adsorbed on pipeline coated to film (3) on film to seal.
3. ship pipeline negative pressure leakage detection cover according to claim 1 and 2, is characterized in that, described digital vacuum table (1), by the pressure difference before display screen read test and after test, realizes on-line checkingi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310223280.8A CN103323189B (en) | 2013-06-07 | 2013-06-07 | A kind of ship pipeline negative pressure leakage detection cover |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310223280.8A CN103323189B (en) | 2013-06-07 | 2013-06-07 | A kind of ship pipeline negative pressure leakage detection cover |
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| CN103323189A CN103323189A (en) | 2013-09-25 |
| CN103323189B true CN103323189B (en) | 2016-01-20 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104913193B (en) * | 2015-06-30 | 2016-10-26 | 宜昌江峡船用机械有限责任公司 | The leak hunting method of a kind of interlayer low-temperature (low temperature) vessel inner pressurd vessel and device |
| CN106932153A (en) * | 2017-04-27 | 2017-07-07 | 保定天威电气设备结构有限公司 | A kind of method and device of container part leak detection |
| CN108168800A (en) * | 2017-12-25 | 2018-06-15 | 沪东中华造船(集团)有限公司 | A kind of method for butterfly valve being replaced to carry out pipeline tightness test using polyethylene tube |
| CN109752281A (en) * | 2019-01-18 | 2019-05-14 | 浙江大学 | A kind of grouting grout outlet self-closed and compaction rate monitoring device and application method |
| CN110608855A (en) * | 2019-10-21 | 2019-12-24 | 启迪蓝光(福建)新材料有限公司 | Device for detecting air leakage in target piece production process |
| CN110702328B (en) * | 2019-10-21 | 2021-06-18 | 中船澄西船舶修造有限公司 | Vacuum state detector in ship tail shaft sealing cavity |
| CN114216386A (en) * | 2021-12-07 | 2022-03-22 | 中煤浙江测绘地理信息有限公司 | Pipeline inner surface detection method and system, storage medium and intelligent terminal |
| CN116642070B (en) * | 2023-07-27 | 2023-11-03 | 枣庄市天一实业有限公司 | Ocean oil gas conveying high-pressure steel wire rubber pipe joint |
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