CN101408466A - Method and device for detecting leakage of shell type heat exchanger - Google Patents
Method and device for detecting leakage of shell type heat exchanger Download PDFInfo
- Publication number
- CN101408466A CN101408466A CNA2008101742164A CN200810174216A CN101408466A CN 101408466 A CN101408466 A CN 101408466A CN A2008101742164 A CNA2008101742164 A CN A2008101742164A CN 200810174216 A CN200810174216 A CN 200810174216A CN 101408466 A CN101408466 A CN 101408466A
- Authority
- CN
- China
- Prior art keywords
- shell
- heat exchanger
- tube heat
- vacuum pump
- tube
- 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.)
- Granted
Links
Images
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to a detection method and a device thereof, in particular to a leak detection method for a shell-and-tube heat exchanger and a device thereof. The detection device comprises a helium mass spectrometer leak detector and a vacuum pump, and is characterized in that an air inlet tube is arranged on an air intake hood which is hermetically connected with one end of the shell-and-tube heat exchanger, an exhaust hood is hermetically arranged on the other end of the shell-and-tube heat exchanger and is equipped with an exhaust tube on the exhaust hood, a vacuum pump clearance tube is arranged on the outer shell of the shell-and-tube heat exchanger, and an air inlet of the helium mass spectrometer leak detector is communicated with the outlet of the vacuum pump. The detection device can lock the leak situations of all the detected shells and tubes in the air intake hood and the exhaust hood which are respectively arranged on the shell-and-tube heat exchanger at one time, and can accurately determine the leaking shells and tubes by replacing hoods of different specifications, thus greatly enhancing the detection efficiency and lightening the labor intensity. Meanwhile, the helium mass spectrometer leak detector is used, thus enhancing the detection precision of the device and eliminates the external interference.
Description
Technical field
The present invention relates to the leakage detection method and the pick-up unit of a kind of detection method and device, particularly shell-and-tube heat exchanger.
Background technology
The structure of shell-and-tube heat exchanger mainly is by the shrouding at shell, shell two ends and installation tubulation in the enclosure, and the periphery at tubulation two ends links to each other with the shrouding sealing.Feed a kind of medium in the tubulation, in the cavity that between shell and tubulation, forms, feed another kind of medium, carry out work by the heat interchange between the two media.If leaking appears in tubulation in the use, will influence production.The main method that detects the tubulation leakage at present has candlelight method and air-compressing.It is by after tubulation one end is sealed that the fire method detects, feed pressurized air in the enclosure or vacuumize, then with candle flame one by one near the mouth of pipe of tubulation, if leakage is arranged in the pipe, candle flame will be attracted to the mouth of pipe or be blown to the mouth of pipe outside, thereby find the copper pipe of leakage.The air-compressing detection is the end sealing with tubulation, and the other end blocks up tight with the middle rubber stopper that has steam guiding tube, and this tubulation is exactly an airtight container.By wireway pressurized air is fed in the tubulation, detect the tubulation internal pressure by the tensimeter that is connected with wireway, if tubulation has leakage, tensimeter pressure also decreases, and shows this tubulation leakage.All there is certain defective in above-mentioned two kinds of detection methods.The candlelight method is subjected to extraneous interference ratio bigger, and there is certain degree of difficulty in the judgement of flame, and since the quantity of tubulation more for a long time, labour intensity is big.Though air-compressing has overcome extraneous interference, but the rubber stopper of its sealing usefulness need bear bigger compressed air pressure, and its tightness is doubtful, these all can impact testing result, and when tubulation has very little leakage, can't detect, this detection simultaneously also is that every tubulation must be examined, and also has the big problem of labour intensity.
And helium mass spectrum leak detection method at present commonly used is mainly used in the leakage detection of turbine vacuum system, to the tubulation leak detection of shell-and-tube heat exchanger, because structural problem also can't be used.
Summary of the invention
The objective of the invention is to overcome the defective that prior art exists, the leakage detection method and the device of the high shell-and-tube heat exchanger of a kind of accuracy of detection and detection efficiency is provided.
For achieving the above object, technical scheme of the present invention is: the method for utilizing the leak detecting device of shell-and-tube heat exchanger to carry out leak test, it is with in the tubulation in the helium access tube shell heat exchanger, the vacuum pump that utilization links to each other with the shell-and-tube heat exchanger shell vacuumizes shell and the formed cavity of tubulation outer wall, by helium mass spectrometer leak detector the air-flow of vacuum pump outlet is carried out helium and detect, determine whether the tubulation that feeds helium leaks.
The leak detecting device of shell-and-tube heat exchanger, comprise helium mass spectrometer leak detector, vacuum pump, it is characterized in that draft tube is installed on the airscoop shroud, airscoop shroud links to each other with the sealing of shell-and-tube heat exchanger one end, the hood sealing is installed in the other end of shell-and-tube heat exchanger, gas outlet is installed on hood, and vacuum pump is open to the custom piping erection on the shell of shell-and-tube heat exchanger, and the air intake opening of helium mass spectrometer leak detector is connected with vacuum pump outlet.
Seal face at above-mentioned airscoop shroud and hood is equipped with sealing strip.
In above-mentioned airscoop shroud, fan is installed.
On the gas outlet on the above-mentioned hood, exhaust fan is installed.
Pick-up unit of the present invention and detection method are to utilize helium and helium mass spectrometer leak detector that the tubulation in the shell-and-tube heat exchanger is detected, to determine the leakage of tubulation.This device is airscoop shroud and the air leaving cover that is installed in the shell-and-tube heat exchanger two ends by sealing, the leakage situation of all the tested tubulations in just can disposable locking inlet, outlet cover, and by change different size into and out of gas hood, dwindle lock-in range gradually, until the tubulation of determining to reveal, improve detection efficiency greatly, reduced labour intensity.Used helium mass spectrometer leak detector simultaneously, in case there is tubulation to reveal, helium will enter in the housing, enters helium mass spectrometer leak detector by vacuum pump, because the accuracy of detection of helium mass spectrometer leak detector is very high, has improved this Device Testing precision, has got rid of external interference.
Description of drawings
Accompanying drawing 1 is utilization structure synoptic diagram of the present invention;
Accompanying drawing 2 is the mounting structure synoptic diagram of hood of the present invention.
Embodiment
This monitoring method is with in the tubulation in the helium access tube shell heat exchanger, the vacuum pump that utilization links to each other with the shell-and-tube heat exchanger shell vacuumizes shell and the formed cavity of tubulation outer wall, by helium mass spectrometer leak detector the air-flow of vacuum pump outlet is carried out helium then and detect, determine whether the tubulation that feeds helium leaks.Concrete pick-up unit as shown in Figure 1, 2, the left end shrouding 11 of the end face of airscoop shroud 2 and shell-and-tube heat exchanger is tightly connected by sealing strip 12, and fan 3 is installed in airscoop shroud, draft tube 1 is installed on the airscoop shroud; The right-hand member shrouding of the end face of hood 9 and shell-and-tube heat exchanger is tightly connected by sealing strip, is installed on the pipeline of the gas outlet on the hood exhaust fan 10 is installed; In shell 4 lower ends of shell-and-tube heat exchanger, threading a pipe 6 is equipped with vacuum pump 7, and the air intake opening of helium mass spectrometer leak detector 8 is connected with vacuum pump outlet.During detection, at first airscoop shroud and hood are distinguished relative fixed on the shrouding at shell-and-tube heat exchanger two ends, fixed form can adopt the mode of magnet absorption.In tubulation 5, send into helium by draft tube then, helium is evenly distributed in the tubulation of airscoop shroud locking, then slowly by discharging by fan.When leaking, helium enters helium mass spectrometer leak detector by vacuum pump, just can determine that the tubulation that airscoop shroud covers has leakage, is changing the little inlet and outlet cover of area then, repeats said process, can determine that finally which tubulation leaks.
Claims (5)
1, the method for utilizing the leak detecting device of shell-and-tube heat exchanger to carry out leak test, it is with in the tubulation in the helium access tube shell heat exchanger, the vacuum pump that utilization links to each other with the shell-and-tube heat exchanger shell vacuumizes shell and the formed cavity of tubulation outer wall, by helium mass spectrometer leak detector the air-flow of vacuum pump outlet is carried out helium and detect, determine whether the tubulation that feeds helium leaks.
2, the leak detecting device of shell-and-tube heat exchanger, comprise helium mass spectrometer leak detector, vacuum pump, it is characterized in that draft tube (1) is installed on the airscoop shroud (2), airscoop shroud links to each other with the sealing of shell-and-tube heat exchanger (4) one ends, hood (9) sealing is installed in the other end of shell-and-tube heat exchanger, gas outlet is installed on hood, and vacuum pump (7) is open to the custom piping erection on the shell of shell-and-tube heat exchanger, and the air intake opening of helium mass spectrometer leak detector (8) is connected with vacuum pump outlet.
3, the leak detecting device of shell-and-tube heat exchanger according to claim 2 is characterized in that at the seal face of above-mentioned airscoop shroud (2) and hood (9) sealing strip (12) being installed.
4,, it is characterized in that in above-mentioned airscoop shroud (2), being equipped with fan (3) according to the leak detecting device of claim 3 or 3 described shell-and-tube heat exchangers.
5, the leak detecting device of shell-and-tube heat exchanger according to claim 4 is characterized in that being equipped with exhaust fan (10) on the gas outlet on the above-mentioned hood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101742164A CN101408466B (en) | 2008-11-08 | 2008-11-08 | Method and device for detecting leakage of shell type heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101742164A CN101408466B (en) | 2008-11-08 | 2008-11-08 | Method and device for detecting leakage of shell type heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101408466A true CN101408466A (en) | 2009-04-15 |
| CN101408466B CN101408466B (en) | 2010-06-02 |
Family
ID=40571566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101742164A Expired - Fee Related CN101408466B (en) | 2008-11-08 | 2008-11-08 | Method and device for detecting leakage of shell type heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101408466B (en) |
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886966A (en) * | 2009-06-26 | 2010-11-17 | 刘安平 | Helium mass spectrum leak detection fixture for tube plate welding seams of evaporator |
| CN101718610B (en) * | 2009-11-03 | 2012-02-08 | 神华集团有限责任公司 | Leakage detecting method for hydraulic end of high-pressure five-plunger pump |
| CN102564708A (en) * | 2011-12-16 | 2012-07-11 | 杭州中泰深冷技术股份有限公司 | Device for detecting sealing property of multi-cavity container or multiple containers by helium |
| CN102589811A (en) * | 2012-02-15 | 2012-07-18 | 西安泰德实业有限公司 | Method and system for detecting interior leakage of heat exchanger |
| CN102620582A (en) * | 2012-04-19 | 2012-08-01 | 刘猛 | Safety heat exchanger capable of monitoring leakage in real time |
| CN104154783A (en) * | 2014-05-06 | 2014-11-19 | 山东金泽利能源科技有限公司 | Shell and tube heat exchanger easy to repair |
| CN105784284A (en) * | 2016-05-19 | 2016-07-20 | 中国石化集团南京化学工业有限公司化工机械厂 | Detection device for inner hole welded joints |
| CN106595978A (en) * | 2016-11-22 | 2017-04-26 | 首钢京唐钢铁联合有限责任公司 | Leak detection device and method |
| CN106762450A (en) * | 2016-11-30 | 2017-05-31 | 北京金风科创风电设备有限公司 | Air heat exchanger leakage detection system and method and wind driven generator |
| CN107356375A (en) * | 2017-07-10 | 2017-11-17 | 丁梦琪 | A kind of leak detection system and method |
| CN107990776A (en) * | 2017-11-20 | 2018-05-04 | 天津市环亚船用热交换器有限公司 | A kind of detection device of novel ship heat exchanger |
| CN108088623A (en) * | 2017-12-08 | 2018-05-29 | 上海航天设备制造总厂有限公司 | For 3D printing equipment vacuum chamber system leakage detection apparatus and leak hunting method |
| CN108318191A (en) * | 2018-02-27 | 2018-07-24 | 萝北奥星新材料有限公司 | A kind of suction type graphite heat exchanger detection method |
| CN108375456A (en) * | 2018-02-27 | 2018-08-07 | 萝北奥星新材料有限公司 | A kind of device for detecting leak point of graphite heat exchanger |
| CN108387345A (en) * | 2018-02-27 | 2018-08-10 | 萝北奥星新材料有限公司 | A kind of heat exchanger tube repair method of graphite heat exchanger |
| CN109357553A (en) * | 2017-11-26 | 2019-02-19 | 上海电气电站环保工程有限公司 | A kind of pipe heat exchanger of easy access |
| CN109596273A (en) * | 2018-10-30 | 2019-04-09 | 苏州迈拓金属检测服务有限公司 | A kind of method that heat exchanger leak point is accurately positioned |
| CN109696279A (en) * | 2018-12-06 | 2019-04-30 | 王伟波 | A kind of gas leak detection device of heat exchanger ejection coil pipe |
| CN109813176A (en) * | 2019-01-25 | 2019-05-28 | 江苏通盛换热器有限公司 | A kind of leak detection tool equipment of heat exchanger |
| CN109883621A (en) * | 2018-12-21 | 2019-06-14 | 西安航天发动机有限公司 | A kind of telescoping structure sealing position leak rate detection method |
| CN110124586A (en) * | 2019-05-21 | 2019-08-16 | 宁波浙铁江宁化工有限公司 | The examination reaction system of cis-butenedioic anhydride |
| CN112729703A (en) * | 2020-12-25 | 2021-04-30 | 重庆川仪自动化股份有限公司 | Sealing detection equipment, detection method and system for pipeline type electromagnetic flowmeter electrode |
| EP4036546A1 (en) * | 2021-01-29 | 2022-08-03 | Huawei Digital Power Technologies Co., Ltd. | Leakage detection apparatus and leakage detection method |
| CN115165238A (en) * | 2022-08-11 | 2022-10-11 | 中国核动力研究设计院 | Detection system and method |
| CN115655592A (en) * | 2022-12-12 | 2023-01-31 | 中国核动力研究设计院 | Micro-channel heat exchanger leakage detection device and detection method based on helium mass spectrum |
| US11754338B2 (en) | 2021-03-09 | 2023-09-12 | Saudi Arabian Oil Company | Method to detect tube leakage in shell and tube thermosiphon reboilers |
| CN117647368A (en) * | 2024-01-29 | 2024-03-05 | 广汉川亿石油科技有限公司 | Heat exchanger air tightness detection device and method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836753A (en) * | 2019-11-20 | 2020-02-25 | 北京丰凯换热器有限责任公司 | Helium mass spectrum positive pressure detection method for plate-fin heat exchanger with closed chambers on two sides |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19522466A1 (en) * | 1995-06-21 | 1997-01-02 | Leybold Ag | Leak detector with backing pump |
| CN1049049C (en) * | 1995-07-17 | 2000-02-02 | 成都东方仪器厂 | Helium leak detector |
| DE10040074A1 (en) * | 2000-08-16 | 2002-02-28 | Inficon Gmbh | Method and device for leak testing a gas generator |
| CN2526839Y (en) * | 2001-11-28 | 2002-12-18 | 成都东方仪器厂 | Vacuum box leakage tester for helium |
| CN1619274A (en) * | 2004-11-25 | 2005-05-25 | 邓永林 | Leak detecting equipment |
| CN101246074A (en) * | 2007-02-16 | 2008-08-20 | 珠海格力电器股份有限公司 | Air conditioner two-unit helium checking device and technique |
| CN201289424Y (en) * | 2008-11-08 | 2009-08-12 | 宁夏电力科技教育工程院 | Leakage detection device for shell type heat exchanger |
-
2008
- 2008-11-08 CN CN2008101742164A patent/CN101408466B/en not_active Expired - Fee Related
Cited By (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886966A (en) * | 2009-06-26 | 2010-11-17 | 刘安平 | Helium mass spectrum leak detection fixture for tube plate welding seams of evaporator |
| CN101886966B (en) * | 2009-06-26 | 2011-12-28 | 刘安平 | Helium mass spectrum leak detection fixture for tube plate welding seams of evaporator |
| CN101718610B (en) * | 2009-11-03 | 2012-02-08 | 神华集团有限责任公司 | Leakage detecting method for hydraulic end of high-pressure five-plunger pump |
| CN102564708A (en) * | 2011-12-16 | 2012-07-11 | 杭州中泰深冷技术股份有限公司 | Device for detecting sealing property of multi-cavity container or multiple containers by helium |
| CN102564708B (en) * | 2011-12-16 | 2014-04-23 | 杭州中泰深冷技术股份有限公司 | Device for detecting sealing property of multi-cavity container or multiple containers by helium |
| CN102589811A (en) * | 2012-02-15 | 2012-07-18 | 西安泰德实业有限公司 | Method and system for detecting interior leakage of heat exchanger |
| CN102620582A (en) * | 2012-04-19 | 2012-08-01 | 刘猛 | Safety heat exchanger capable of monitoring leakage in real time |
| CN102620582B (en) * | 2012-04-19 | 2014-04-16 | 刘猛 | Safety heat exchanger capable of monitoring leakage in real time |
| CN104154783A (en) * | 2014-05-06 | 2014-11-19 | 山东金泽利能源科技有限公司 | Shell and tube heat exchanger easy to repair |
| CN104154783B (en) * | 2014-05-06 | 2016-01-20 | 山东金泽利能源科技有限公司 | A kind of tubular heat exchanger being easy to overhaul |
| CN105784284A (en) * | 2016-05-19 | 2016-07-20 | 中国石化集团南京化学工业有限公司化工机械厂 | Detection device for inner hole welded joints |
| CN106595978A (en) * | 2016-11-22 | 2017-04-26 | 首钢京唐钢铁联合有限责任公司 | Leak detection device and method |
| CN106595978B (en) * | 2016-11-22 | 2019-02-01 | 首钢京唐钢铁联合有限责任公司 | A kind of leakage detection apparatus and method |
| CN106762450A (en) * | 2016-11-30 | 2017-05-31 | 北京金风科创风电设备有限公司 | Air heat exchanger leakage detection system and method and wind driven generator |
| CN107356375A (en) * | 2017-07-10 | 2017-11-17 | 丁梦琪 | A kind of leak detection system and method |
| CN107990776A (en) * | 2017-11-20 | 2018-05-04 | 天津市环亚船用热交换器有限公司 | A kind of detection device of novel ship heat exchanger |
| CN109357553A (en) * | 2017-11-26 | 2019-02-19 | 上海电气电站环保工程有限公司 | A kind of pipe heat exchanger of easy access |
| CN108088623A (en) * | 2017-12-08 | 2018-05-29 | 上海航天设备制造总厂有限公司 | For 3D printing equipment vacuum chamber system leakage detection apparatus and leak hunting method |
| CN108387345A (en) * | 2018-02-27 | 2018-08-10 | 萝北奥星新材料有限公司 | A kind of heat exchanger tube repair method of graphite heat exchanger |
| CN108318191A (en) * | 2018-02-27 | 2018-07-24 | 萝北奥星新材料有限公司 | A kind of suction type graphite heat exchanger detection method |
| CN108318191B (en) * | 2018-02-27 | 2020-01-17 | 萝北奥星新材料有限公司 | Detection method for negative pressure type graphite heat exchanger |
| CN108375456A (en) * | 2018-02-27 | 2018-08-07 | 萝北奥星新材料有限公司 | A kind of device for detecting leak point of graphite heat exchanger |
| CN109596273A (en) * | 2018-10-30 | 2019-04-09 | 苏州迈拓金属检测服务有限公司 | A kind of method that heat exchanger leak point is accurately positioned |
| CN109696279A (en) * | 2018-12-06 | 2019-04-30 | 王伟波 | A kind of gas leak detection device of heat exchanger ejection coil pipe |
| CN109883621A (en) * | 2018-12-21 | 2019-06-14 | 西安航天发动机有限公司 | A kind of telescoping structure sealing position leak rate detection method |
| CN109813176A (en) * | 2019-01-25 | 2019-05-28 | 江苏通盛换热器有限公司 | A kind of leak detection tool equipment of heat exchanger |
| CN110124586B (en) * | 2019-05-21 | 2022-02-08 | 宁波浙铁江宁化工有限公司 | Maleic anhydride test reaction system |
| CN110124586A (en) * | 2019-05-21 | 2019-08-16 | 宁波浙铁江宁化工有限公司 | The examination reaction system of cis-butenedioic anhydride |
| CN112729703A (en) * | 2020-12-25 | 2021-04-30 | 重庆川仪自动化股份有限公司 | Sealing detection equipment, detection method and system for pipeline type electromagnetic flowmeter electrode |
| CN112729703B (en) * | 2020-12-25 | 2022-07-12 | 重庆川仪自动化股份有限公司 | Sealing detection equipment, detection method and system for pipeline type electromagnetic flowmeter electrode |
| EP4036546A1 (en) * | 2021-01-29 | 2022-08-03 | Huawei Digital Power Technologies Co., Ltd. | Leakage detection apparatus and leakage detection method |
| US11754338B2 (en) | 2021-03-09 | 2023-09-12 | Saudi Arabian Oil Company | Method to detect tube leakage in shell and tube thermosiphon reboilers |
| CN115165238A (en) * | 2022-08-11 | 2022-10-11 | 中国核动力研究设计院 | Detection system and method |
| CN115655592A (en) * | 2022-12-12 | 2023-01-31 | 中国核动力研究设计院 | Micro-channel heat exchanger leakage detection device and detection method based on helium mass spectrum |
| CN117647368A (en) * | 2024-01-29 | 2024-03-05 | 广汉川亿石油科技有限公司 | Heat exchanger air tightness detection device and method thereof |
| CN117647368B (en) * | 2024-01-29 | 2024-04-02 | 广汉川亿石油科技有限公司 | Heat exchanger air tightness detection device and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101408466B (en) | 2010-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101408466B (en) | Method and device for detecting leakage of shell type heat exchanger | |
| CN101271034B (en) | Gas meter leak tightness detecting method and device thereof | |
| CN204694421U (en) | Valve leak detection proving installation | |
| CN110486629A (en) | Air-tightness detection device and method for double fuel host gas pipeline | |
| CN201083590Y (en) | High-temperature high pressure helium-leakage detecting apparatus | |
| CN105910761A (en) | Tube flange gas leakage detection device | |
| CN201503332U (en) | Packing box for hydraulic test on floating tube sheet end of floating head type heat exchanger | |
| CN201289424Y (en) | Leakage detection device for shell type heat exchanger | |
| CN112213045A (en) | Single-tube helium leakage detecting and filling device of heat exchanger and detection method | |
| CN201331421Y (en) | Air tightness detecting device of engine cylinder head | |
| CN114965895B (en) | Integrated gas concentration detection device | |
| CN109765004A (en) | A kind of gas seal property analog synthesis detection system | |
| CN214040539U (en) | Heat exchange tube leak detection device | |
| JP5463727B2 (en) | Condenser cooling pipe leak inspection device | |
| CN211234865U (en) | Online leak detector | |
| CN210108640U (en) | Water heater gas tightness detection device | |
| CN209910908U (en) | Valve test device | |
| CN102853976B (en) | Online leakage detection method and device thereof for heat treatment furnace radiant tube | |
| CN216116610U (en) | Accurate leak detection system of gas-water heat exchanger | |
| CN207007440U (en) | A kind of heat exchanger tube helium checking device | |
| CN101545821A (en) | Method for detecting inside leakage of waste gas air heat exchanger for heating furnace | |
| CN219474910U (en) | Welding quality and internal leakage detection device for plate heat exchanger | |
| CN114018494B (en) | Nuclear condenser tracing leakage detection equipment test simulation system and method | |
| CN113701963A (en) | Accurate leakage detection system and method for gas-water heat exchanger | |
| CN220961005U (en) | Pressure testing assembly for inner and outer double-layer casting pipes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20211108 |